/* ============================================
   CHESSER — Screen-specific Styles
   ============================================ */

/* ===========================================
   MAIN MENU (#screen-menu)
   =========================================== */
#screen-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-lg);
  overflow-y: auto;
  min-height: 100%;
  position: relative;
}

.floating-pieces-container {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

@media (max-height: 680px) {
  #screen-menu {
    justify-content: flex-start;
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
  }
  .menu-logo {
    margin-bottom: var(--space-sm);
  }
  .menu-logo h1 {
    font-size: 2.2rem;
  }
  .menu-nav {
    gap: var(--space-xs);
    margin-top: var(--space-xs);
    margin-bottom: var(--space-xs);
  }
  .menu-card {
    padding: var(--space-sm) var(--space-xs);
  }
  .menu-card .card-icon {
    width: 38px;
    height: 38px;
    font-size: 1.4rem;
  }
  .menu-chesser {
    margin-top: var(--space-xs);
  }
}

/* --- Logo (compact for viewport fit) --- */
.menu-logo {
  text-align: center;
  margin-bottom: var(--space-md);
  min-height: 0;
  flex-shrink: 1;
  position: relative;
}

/* Radial glow behind the logo text */
.menu-logo::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 320px;
  height: 120px;
  background: radial-gradient(ellipse, rgba(219, 178, 74, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.menu-logo h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vh, 3.2rem);
  font-weight: 900;
  color: var(--color-accent-gold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.menu-logo .tagline {
  font-family: var(--font-body);
  font-size: clamp(0.75rem, 1.5vh, 0.95rem);
  color: var(--color-text-secondary);
  font-weight: 400;
  letter-spacing: 0.1em;
}

/* --- Navigation Grid (compact 2×2, now Flex for 5-card symmetry) --- */
.menu-nav {
  display: grid;
  grid-template-columns: repeat(3, 170px); /* 3 columns of fixed width */
  grid-template-rows: repeat(2, auto);    /* 2 rows */
  justify-content: center;
  justify-items: center;
  align-items: stretch;
  gap: var(--space-sm);
  max-width: 530px; /* Symmetrical container for 3 columns with smaller gap */
  width: 100%;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
  min-height: 0;
  flex-shrink: 1;
}

.menu-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-sm);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 0;
  width: 100%; /* Fill the grid cell */
  max-width: 170px;
}

.menu-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(219, 178, 74, 0.06) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.menu-card:hover {
  transform: translateY(-3px) scale(1.02);
  border-color: var(--color-accent-gold-dim);
  box-shadow: var(--shadow-lg), var(--shadow-gold);
}

.menu-card:hover::before {
  opacity: 1;
}

/* Inner glow on hover */
.menu-card:hover::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 20px rgba(219, 178, 74, 0.08);
  pointer-events: none;
}

.menu-card:active {
  transform: translateY(-1px) scale(1.01);
}

.menu-card .card-icon {
  font-size: 1.8rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(219, 178, 74, 0.1);
  color: var(--color-accent-gold);
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.menu-card:hover .card-icon {
  background: rgba(219, 178, 74, 0.2);
  transform: scale(1.08);
}

.menu-card .card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
}

.menu-card .card-desc {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  line-height: 1.3;
}

/* Exit card - centered bottom, compact row */
.menu-exit-wrap {
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: 480px;
  min-height: 0;
  flex-shrink: 1;
}

.menu-card.card-exit {
  flex-direction: row;
  padding: var(--space-sm) var(--space-lg);
  gap: var(--space-sm);
  max-width: 200px;
  opacity: 0.7;
}
.menu-card.card-exit:hover {
  opacity: 1;
}
.menu-card.card-exit .card-icon {
  font-size: 1.2rem;
  width: 32px;
  height: 32px;
  background: rgba(212, 84, 84, 0.1);
  color: var(--color-error);
}
.menu-card.card-exit .card-title {
  font-size: 0.9rem;
}

/* Locked Menu Card Styling */
.menu-card.locked {
  cursor: not-allowed !important;
  filter: grayscale(0.85) opacity(0.7) !important;
  border-color: var(--glass-border) !important;
}

.menu-card.locked:hover {
  transform: none !important;
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.04) !important;
  border-color: var(--glass-border) !important;
}

.menu-card.locked:hover::after {
  content: none !important;
}

.menu-card.locked:hover .card-icon {
  background: rgba(219, 178, 74, 0.1) !important;
  transform: none !important;
}

.menu-card.locked .card-lock-icon {
  position: absolute;
  top: 10px;
  right: 10px;
  color: var(--color-accent-gold);
  background: rgba(0, 0, 0, 0.35);
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(2px);
  z-index: 10;
}

.theme-cyberpunk .menu-card.locked .card-lock-icon {
  color: var(--color-accent-cyber);
}

.theme-pixel .menu-card.locked .card-lock-icon {
  color: var(--color-accent-pixel);
  border-radius: 0;
}

/* Chesser greeting at bottom — compact */
.menu-chesser {
  margin-top: var(--space-sm);
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
  min-height: 0;
  flex-shrink: 1;
}

.menu-chesser-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-amber));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.menu-chesser-bubble {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md) var(--radius-md) var(--radius-md) var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  max-width: 340px;
  box-shadow: var(--shadow-sm);
}


/* ===========================================
   TRAIL SCREEN (#screen-trail)
   =========================================== */
#screen-trail {
  display: flex;
  flex-direction: column;
  height: 100%;
}

#screen-trail .screen-content {
  display: flex;
  flex-direction: row;
  gap: var(--space-lg);
  padding: var(--space-md);
  flex: 1;
  min-height: 0;
  overflow: hidden !important;
}

.trail-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
}

.trail-progress-header {
  background: var(--color-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.trail-progress-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.trail-progress-title {
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.trail-progress-stat {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent-gold);
}

.trail-path {
  flex: 1;
  padding: var(--space-lg) var(--space-md);
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  min-height: 0;
  background: rgba(10, 13, 20, 0.3);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.trail-timeline-wrapper {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  min-height: 100%;
}

/* Timeline Vertical Line */
.trail-timeline-wrapper::before {
  content: '';
  position: absolute;
  top: 39px; /* Start exactly at center of first node circle */
  bottom: 39px; /* End exactly at center of last node circle */
  left: 50%;
  width: 4px;
  background: linear-gradient(to bottom, var(--color-accent-gold), var(--color-bg-tertiary));
  transform: translateX(-50%);
  z-index: 0;
}

/* Trail card node */
.trail-node {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  width: 90%;
  max-width: 500px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

/* Zigzag offset on desktop */
@media (min-width: 768px) {
  .trail-node {
    width: 40% !important;
    max-width: 400px !important;
    position: relative;
  }
  .trail-node:nth-child(odd) {
    align-self: flex-start;
    margin-left: auto !important;
    margin-right: calc(50% + 30px) !important;
    transform: none !important;
  }
  .trail-node:nth-child(even) {
    align-self: flex-end;
    margin-left: calc(50% + 30px) !important;
    margin-right: auto !important;
    transform: none !important;
    flex-direction: row-reverse;
  }
}

.trail-node:hover {
  border-color: var(--color-accent-gold);
  box-shadow: var(--shadow-md), var(--shadow-gold);
}
@media (min-width: 768px) {
  .trail-node:nth-child(odd):hover {
    transform: translateY(-3px) !important;
  }
  .trail-node:nth-child(even):hover {
    transform: translateY(-3px) !important;
  }
}
@media (max-width: 767px) {
  .trail-node:hover {
    transform: translateY(-3px);
  }
}

.trail-node-circle {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-full);
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition-base);
  flex-shrink: 0;
  color: var(--color-text-secondary);
}

.trail-node.completed {
  border-left: 4px solid var(--color-success);
}

.trail-node.completed .trail-node-circle {
  background: var(--color-success);
  border-color: var(--color-success);
  color: var(--color-bg-primary);
}

.trail-node.current {
  border: 1.5px solid var(--color-accent-gold);
  box-shadow: var(--shadow-gold);
  animation: borderGlow 2s infinite alternate;
}

@keyframes borderGlow {
  0% { box-shadow: 0 0 5px rgba(207, 171, 83, 0.2); }
  100% { box-shadow: 0 0 15px rgba(207, 171, 83, 0.6); }
}

.trail-node.current .trail-node-circle {
  background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-amber));
  border-color: var(--color-accent-gold);
  color: var(--color-bg-primary);
  font-weight: bold;
}

.trail-node.locked {
  cursor: not-allowed;
  border-color: transparent;
  background: var(--color-bg-secondary) !important;
}

.trail-node.locked .trail-node-circle,
.trail-node.locked .trail-node-info,
.trail-node.locked .btn-node-train {
  opacity: 0.5;
}

.trail-node.locked:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
  border-color: transparent;
}

.trail-node-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  min-width: 0;
  text-align: left;
}

.trail-node-title {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.trail-node-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.trail-node-badge {
  font-size: 0.7rem;
  padding: 2px var(--space-sm);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

/* Trail sidebar */
.trail-sidebar {
  width: 300px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-lg);
  max-height: 100%;
  overflow-y: auto;
  align-self: stretch;
}

/* ---- Smart Trail Button ---- */
.btn-smart-trail {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: auto;
  align-self: flex-start;
  padding: 6px 14px;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, rgba(219, 178, 74, 0.12), rgba(219, 178, 74, 0.06));
  border: 1px solid rgba(219, 178, 74, 0.3);
  border-radius: var(--radius-sm);
  color: var(--color-accent-gold);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.btn-smart-trail::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(219, 178, 74, 0.08), transparent);
  transition: left 0.5s ease;
}

.btn-smart-trail:hover::before {
  left: 100%;
}

.btn-smart-trail:hover {
  background: linear-gradient(135deg, rgba(219, 178, 74, 0.2), rgba(219, 178, 74, 0.1));
  border-color: var(--color-accent-gold);
  box-shadow: var(--shadow-gold);
  transform: translateY(-1px);
}

.btn-smart-trail svg {
  flex-shrink: 0;
}

.smart-trail-lock-icon {
  margin-left: auto;
  opacity: 0.6;
  display: flex;
  align-items: center;
}

.btn-smart-trail.unlocked .smart-trail-lock-icon {
  display: none;
}

/* ---- Smart Trail Active Banner ---- */
.smart-trail-active-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, rgba(74, 189, 122, 0.12), rgba(74, 189, 122, 0.06));
  border: 1px solid rgba(74, 189, 122, 0.3);
  border-radius: var(--radius-md);
  flex-shrink: 0;
  animation: smartTrailBannerIn 0.4s ease-out;
}

@keyframes smartTrailBannerIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.smart-trail-banner-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-success);
  font-size: 0.85rem;
  min-width: 0;
}

.smart-trail-banner-info svg {
  flex-shrink: 0;
}

.smart-trail-banner-title {
  font-weight: 600;
  white-space: nowrap;
}

.smart-trail-banner-detail {
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-smart-trail-reset {
  background: rgba(212, 84, 84, 0.1);
  border: 1px solid rgba(212, 84, 84, 0.3);
  color: var(--color-error);
  border-radius: var(--radius-sm);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-smart-trail-reset:hover {
  background: rgba(212, 84, 84, 0.2);
  border-color: var(--color-error);
}

/* ---- Smart Trail Modal ---- */
.smart-trail-card {
  max-width: 480px !important;
  padding: var(--space-xl) !important;
}

.smart-trail-modal-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  color: var(--color-accent-gold);
}

.smart-trail-modal-header h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0;
}

.smart-trail-field {
  margin-bottom: var(--space-lg);
}

.smart-trail-label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.smart-trail-hint {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  margin: 0 0 var(--space-sm) 0;
}

/* ELO Slider Group */
.smart-trail-elo-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.smart-trail-slider-wrap {
  flex: 1;
  min-width: 0;
}

.smart-trail-slider {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: 3px;
  outline: none;
  transition: background 0.2s;
}

.smart-trail-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-amber));
  cursor: pointer;
  border: 2px solid var(--color-bg-primary);
  box-shadow: 0 0 8px rgba(219, 178, 74, 0.4);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.smart-trail-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 14px rgba(219, 178, 74, 0.6);
}

.smart-trail-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-amber));
  cursor: pointer;
  border: 2px solid var(--color-bg-primary);
  box-shadow: 0 0 8px rgba(219, 178, 74, 0.4);
}

.smart-trail-elo-display {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent-gold);
  min-width: 45px;
  text-align: right;
  flex-shrink: 0;
}

.smart-trail-elo-ticks {
  display: flex;
  justify-content: space-between;
  padding: var(--space-xs) 0 0;
  font-size: 0.7rem;
  color: var(--color-text-dim);
}

/* Focus Area Chips */
.smart-trail-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.focus-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--glass-bg);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.focus-chip:hover {
  border-color: var(--color-accent-gold-dim);
  background: rgba(219, 178, 74, 0.05);
  color: var(--color-text-primary);
}

.focus-chip.selected {
  background: rgba(219, 178, 74, 0.15);
  border-color: var(--color-accent-gold);
  color: var(--color-accent-gold);
  font-weight: 600;
  box-shadow: 0 0 8px rgba(219, 178, 74, 0.15);
}

.focus-chip .chip-emoji {
  font-size: 1rem;
  line-height: 1;
}

/* Result Preview */
.smart-trail-result {
  padding: var(--space-sm) var(--space-md);
  background: rgba(74, 189, 122, 0.1);
  border: 1px solid rgba(74, 189, 122, 0.25);
  border-radius: var(--radius-sm);
  color: var(--color-success);
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Generate Button */
.smart-trail-generate {
  margin-top: var(--space-sm);
  font-family: var(--font-display) !important;
  font-weight: 700 !important;
  letter-spacing: 0.03em;
}

.smart-trail-generate:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .smart-trail-active-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  .btn-smart-trail-reset {
    align-self: flex-end;
  }
}


/* ===========================================
   LIBRARY SCREEN (#screen-library)
   =========================================== */
#screen-library .screen-content {
  padding-top: 20px !important;
}

.library-controls {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  align-items: center;
}

.library-search {
  flex: 1;
  min-width: 260px;
  position: relative;
}

.library-search input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  padding-left: 44px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  color: var(--color-text-primary);
}

.library-search .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-dim);
  font-size: 1.1rem;
  pointer-events: none;
}

.library-filter {
  display: flex;
  gap: var(--space-sm);
}

.library-filter select {
  padding: var(--space-sm) var(--space-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  min-width: 140px;
}

.library-filter select option {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.lesson-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
}

.lesson-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-gold);
  border-color: var(--color-accent-gold-dim);
}

.lesson-card-band {
  height: 4px;
  width: 100%;
}
.lesson-card-band.abertura { background: var(--color-cat-abertura); }
.lesson-card-band.tatica { background: var(--color-cat-tatica); }
.lesson-card-band.final { background: var(--color-cat-final); }
.lesson-card-band.armadilha { background: var(--color-cat-armadilha); }
.lesson-card-band.defesa { background: var(--color-cat-defesa); }
.lesson-card-band.estrategia { background: var(--color-cat-estrategia); }

.lesson-card-body {
  padding: var(--space-lg);
}

.lesson-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
}

.lesson-card-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  flex: 1;
}

.lesson-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lesson-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.lesson-card-time {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.library-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-dim);
}

.library-empty .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}


/* ===========================================
   SETTINGS SCREEN (#screen-settings)
   =========================================== */
#screen-settings .screen-content {
  padding-top: 20px !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

.settings-section {
  margin-bottom: var(--space-xl);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  padding: 0 var(--space-lg);
}

.settings-section-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-accent-gold);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.settings-section-title .icon {
  font-size: 1.3rem;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  transition: border-color var(--transition-fast);
}

.settings-row:hover {
  border-color: rgba(219, 178, 74, 0.25);
}

.settings-label {
  font-size: 0.95rem;
  color: var(--color-text-primary);
}

.settings-sublabel {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  margin-top: 2px;
}

.settings-slider-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-width: 200px;
}

.settings-slider-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent-gold);
  min-width: 40px;
  text-align: right;
}

/* Theme selector cards styling */
.settings-row-vertical {
  display: flex;
  flex-direction: column;
  padding: var(--space-md) var(--space-lg);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  transition: border-color var(--transition-fast);
}
.settings-row-vertical:hover {
  border-color: rgba(219, 178, 74, 0.25);
}

.theme-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
  width: 100%;
}

.theme-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.01);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.theme-card:hover {
  border-color: var(--color-accent-gold-dim);
  background: rgba(255, 255, 255, 0.03);
  transform: translateX(4px);
}
.theme-card.active {
  border-color: var(--color-accent-gold);
  background: rgba(219, 178, 74, 0.07);
  box-shadow: var(--shadow-gold);
}

.theme-card.locked {
  opacity: 0.55;
  cursor: not-allowed;
  border-color: rgba(255, 255, 255, 0.05);
}

.theme-card.locked .theme-card-preview {
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all 0.3s ease;
}

.theme-card.locked:hover {
  border-color: rgba(212, 175, 55, 0.3);
  background: rgba(212, 175, 55, 0.02);
  transform: none;
  opacity: 0.8;
}

.theme-card.locked:hover .theme-card-preview {
  filter: grayscale(30%);
  opacity: 0.9;
}

.theme-lock-icon {
  margin-left: auto;
  color: var(--color-accent-gold);
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.1);
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.theme-card.locked:hover .theme-lock-icon {
  background: var(--color-accent-gold);
  color: #120e0b;
  box-shadow: 0 0 15px rgba(212, 175, 55, 0.4);
}

.theme-card-preview {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  flex-shrink: 0;
  border: 1px solid var(--glass-border);
}
.theme-card-preview .theme-half {
  width: 50%;
  height: 100%;
}

.theme-card.locked .theme-card-preview::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.45) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%23d4af37" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="11" width="18" height="11" rx="2" ry="2"></rect><path d="M7 11V7a5 5 0 0 1 10 0v4"></path></svg>') no-repeat center;
  background-size: 16px 16px;
  transition: all 0.3s ease;
  z-index: 2;
}

.theme-card.locked:hover .theme-card-preview::after {
  background-color: rgba(0, 0, 0, 0.2);
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%23ffd43b" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="11" width="18" height="11" rx="2" ry="2"></rect><path d="M7 11V7a5 5 0 0 1 10 0v4"></path></svg>');
  transform: scale(1.08);
}


.theme-card-preview.theme-classic .theme-half:first-child { background: #eed9c4; }
.theme-card-preview.theme-classic .theme-half:last-child { background: #8e684a; }

.theme-card-preview.theme-cyberpunk .theme-half:first-child { background: #2e255c; }
.theme-card-preview.theme-cyberpunk .theme-half:last-child { background: #12092b; }

.theme-card-preview.theme-minimalist .theme-half:first-child { background: #3a3a3a; }
.theme-card-preview.theme-minimalist .theme-half:last-child { background: #222222; }

.theme-card-preview.theme-cartoon .theme-half:first-child { background: #ffec99; }
.theme-card-preview.theme-cartoon .theme-half:last-child { background: #4dabf7; }

.theme-card-preview.theme-pixel .theme-half:first-child { background: #8bab85; }
.theme-card-preview.theme-pixel .theme-half:last-child { background: #306230; }

.theme-card-preview.theme-stone .theme-half:first-child { background: #b5ada3; }
.theme-card-preview.theme-stone .theme-half:last-child { background: #5c554c; }

.theme-card-preview.theme-vampiric .theme-half:first-child { background: #b8a6a6; }
.theme-card-preview.theme-vampiric .theme-half:last-child { background: #330000; }

.theme-card-preview.theme-universe .theme-half:first-child { background: #7c69eb; }
.theme-card-preview.theme-universe .theme-half:last-child { background: #0b051a; }

.theme-card-info {
  display: flex;
  flex-direction: column;
  text-align: left;
  min-width: 0;
}
.theme-card-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
}
.theme-card-desc {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  margin-top: 2px;
  white-space: normal;
  line-height: 1.3;
}

/* Language greyed out */
.settings-row.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.settings-row .coming-soon {
  font-size: 0.7rem;
  color: var(--color-text-dim);
  font-style: italic;
}


/* ===========================================
   FREE TRAINING (#screen-training)
   =========================================== */
#screen-training .screen-content,
#screen-coach .screen-content {
  padding-top: 0 !important;
  overflow: hidden !important;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#screen-training.game-active .screen-content,
#screen-coach.game-active .screen-content {
  padding-top: 0 !important;
  padding-left: var(--space-xs) !important;
  padding-right: var(--space-xs) !important;
  overflow: hidden !important;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

#screen-training.game-active .training-game,
#screen-coach.game-active .training-game {
  flex: 1;
  height: 100%;
  min-height: 0;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

/* Setup Panel */
.training-setup {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  max-width: 500px;
  margin: 0 auto;
  padding: var(--space-2xl);
}

.training-setup-section {
  width: 100%;
  text-align: center;
}

.training-setup-section h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-accent-gold);
  margin-bottom: var(--space-md);
}

.difficulty-buttons {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.difficulty-btn {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  font-weight: 600;
  transition: all var(--transition-base);
  font-size: 0.9rem;
}

.difficulty-btn:hover {
  border-color: var(--color-accent-gold-dim);
  color: var(--color-text-primary);
}

.difficulty-btn.active {
  background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-amber));
  color: var(--color-bg-primary);
  border-color: var(--color-accent-gold);
  box-shadow: var(--shadow-gold);
}

.color-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

.color-btn {
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  min-width: 100px;
}

.color-btn .color-icon {
  font-size: 1.8rem;
}

.color-btn:hover {
  border-color: var(--color-accent-gold-dim);
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

.color-btn.active {
  border-color: var(--color-accent-gold);
  background: rgba(219, 178, 74, 0.1);
  color: var(--color-accent-gold);
  box-shadow: var(--shadow-gold);
}

/* Game View */
.training-game {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  align-items: flex-start;
  padding: var(--space-md);
}

#screen-training.game-active,
#screen-coach.game-active,
#screen-review,
#screen-coach-review {
  --board-size: min(620px, 75vh);
}

.game-board-area {
  display: flex;
  gap: var(--space-md);
  align-items: stretch;
}

.game-side-panel {
  width: 320px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  height: var(--board-size);
  max-height: var(--board-size);
  min-height: 0;
  overflow: hidden;
}

/* Turn indicator */
.turn-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-weight: 600;
  flex-shrink: 0;
}

.turn-dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-accent-gold-dim);
}
.turn-dot.white { background: #f0e6d6; }
.turn-dot.black { background: #2a221a; }

/* Move list */
.move-list-panel {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 200px;
  max-height: 350px;
}

.move-list-header {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--glass-border);
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--color-accent-gold);
}

.move-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm);
}

.move-row {
  display: flex;
  align-items: center;
  padding: 2px var(--space-sm);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.move-row:hover {
  background: rgba(219, 178, 74, 0.08);
}

.move-number {
  color: var(--color-text-dim);
  width: 28px;
  flex-shrink: 0;
  font-size: 0.8rem;
}

.move-white, .move-black {
  flex: 1;
  padding: 2px var(--space-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
  color: var(--color-text-primary);
}

.move-white:hover, .move-black:hover {
  background: rgba(219, 178, 74, 0.15);
}

.move-white.active, .move-black.active {
  background: rgba(219, 178, 74, 0.2);
  color: var(--color-accent-gold);
}

/* Move classifications */
.move-great { color: var(--color-success); }
.move-good { color: #a0d090; }
.move-inaccuracy { color: var(--color-warning); }
.move-mistake { color: #e87830; }
.move-blunder { color: var(--color-error); }

/* Game action buttons */
.game-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.game-actions .btn {
  flex: 1;
  min-width: 120px;
}


/* ===========================================
   LESSON VIEWER (#screen-lesson)
   =========================================== */
#screen-lesson .screen-content {
  padding-top: 0 !important;
}

.lesson-view {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  align-items: flex-start;
  padding: var(--space-md);
}

.lesson-side-panel {
  width: 360px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.lesson-info {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.lesson-info-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-accent-gold);
  margin-bottom: var(--space-md);
}

.lesson-progress-bar {
  width: 100%;
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.lesson-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-gold), var(--color-accent-amber));
  border-radius: 3px;
  transition: width var(--transition-base);
}

.lesson-step-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.lesson-step-counter {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  margin-bottom: var(--space-sm);
}

.lesson-nav {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.lesson-nav .btn {
  flex: 1;
}

.lesson-prompt {
  background: rgba(219, 178, 74, 0.08);
  border: 1px solid rgba(219, 178, 74, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  color: var(--color-accent-gold);
  font-weight: 600;
  animation: glowPulse 2s ease-in-out infinite;
}


/* ===========================================
   REVIEW SCREEN (#screen-review)
   =========================================== */
#screen-review {
  height: 100vh !important;
  overflow: hidden !important;
}

#screen-review .screen-content {
  padding-top: 0 !important;
  height: auto;
  box-sizing: border-box;
  overflow: hidden !important;
  display: flex;
  flex-direction: column;
}

.review-view {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  align-items: stretch;
  padding: var(--space-md);
  height: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.review-side-panel {
  width: 340px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  height: var(--board-size);
  max-height: var(--board-size);
  min-height: 0;
  overflow: hidden;
}

.review-nav-buttons {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-shrink: 0;
}

.review-nav-buttons .btn {
  font-size: 1.1rem;
  width: 48px;
  height: 40px;
  padding: 0 !important;
  min-width: 0 !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.review-move-info {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.review-best-move {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(109, 191, 103, 0.1);
  border: 1px solid rgba(109, 191, 103, 0.2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-success);
  margin-top: var(--space-sm);
}

.review-your-move {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-top: var(--space-xs);
}

.review-no-game {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-3xl);
  text-align: center;
}

.review-no-game .empty-icon {
  font-size: 4rem;
  opacity: 0.3;
}

.review-no-game p {
  color: var(--color-text-dim);
  font-size: 1.1rem;
}

/* --- Training Button on Trail Nodes --- */
.btn-node-train {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: var(--color-bg-secondary); /* Opaque background to block the timeline line */
  border: 2px solid rgba(219, 178, 74, 0.3);
  color: var(--color-accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  flex-shrink: 0;
  margin-left: auto;
  z-index: 10;
}
.btn-node-train:hover {
  background: var(--color-accent-gold);
  color: var(--color-bg-primary);
  transform: scale(1.1);
  box-shadow: 0 0 12px rgba(219, 178, 74, 0.5);
  border-color: var(--color-accent-gold);
}

@media (min-width: 768px) {
  .trail-node {
    position: relative;
  }
  .btn-node-train {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    margin: 0 !important;
  }
  /* Neutralize vertical translate of parent hover to keep the button completely static */
  .trail-node:hover .btn-node-train {
    transform: translateY(calc(-50% + 3px));
  }
  .btn-node-train:hover {
    transform: translateY(calc(-50% + 3px)) scale(1.1) !important;
  }
  /* Precisely center the button on the timeline line in the empty space */
  .trail-node:nth-child(odd) .btn-node-train {
    right: -49px;
    left: auto;
  }
  .trail-node:nth-child(even) .btn-node-train {
    left: -49px;
    right: auto;
  }

  /* Branches (horizontal lines) connecting training buttons to lesson cards */
  .trail-node:nth-child(odd)::after {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 100%;
    width: 30px;
    height: 3px;
    background: rgba(219, 178, 74, 0.25);
    transition: all var(--transition-base);
    z-index: -1;
  }
  .trail-node:nth-child(even)::after {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: 100%;
    width: 30px;
    height: 3px;
    background: rgba(219, 178, 74, 0.25);
    transition: all var(--transition-base);
    z-index: -1;
  }
  /* Branch hover highlights — neutralized vertical translation to remain static while card moves up */
  .trail-node:hover::after {
    transform: translateY(calc(-50% + 3px));
    background: var(--color-accent-gold);
    box-shadow: 0 0 8px rgba(219, 178, 74, 0.6);
  }
}

/* Pulse hint button in training */
@keyframes pulseHint {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(219, 178, 74, 0.5);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(219, 178, 74, 0);
    transform: scale(1.05);
    background-color: rgba(219, 178, 74, 0.15);
  }
}
.pulse-button {
  animation: pulseHint 1.5s infinite;
  border: 1px solid var(--color-accent-gold) !important;
}

/* ===========================================
   RESPONSIVENESS & MOBILE LAYOUTS
   =========================================== */

/* Tablets and small desktops */
@media (max-width: 991px) {
  :root {
    --board-size: min(480px, 92vw, 50vh);
  }

  /* Header refinements */
  .screen-header {
    padding: var(--space-sm) var(--space-md);
    min-height: 60px;
  }
  .screen-header h2 {
    font-size: 1.35rem;
    padding: 0 80px !important;
  }
  .btn-back {
    top: 50%;
    left: var(--space-md);
    transform: translateY(-50%);
    position: absolute;
    padding: var(--space-xs) var(--space-sm);
  }

  /* Adjust padding to fit header changes */
  #screen-lesson .screen-content {
    padding-top: 0 !important;
  }
  #screen-review .screen-content,
  #screen-training .screen-content,
  #screen-coach .screen-content {
    padding-top: 0 !important;
  }

  /* Trail Screen Stack */
  #screen-trail .screen-content {
    flex-direction: column;
    overflow-y: auto !important;
    gap: var(--space-md);
  }
  .trail-container {
    flex: none;
    height: auto;
  }
  .trail-path {
    height: 420px;
    flex: none;
  }
  .trail-sidebar {
    width: 100% !important;
    max-height: none !important;
    align-self: center;
    padding: var(--space-md) !important;
    background: var(--glass-bg);
    border-radius: var(--radius-lg);
  }

  /* Chess Game Screens Stacking (Training, Lesson, Review) */
  .training-game,
  .lesson-view,
  .review-view {
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-sm);
  }

  .game-board-area {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .game-side-panel,
  .lesson-side-panel,
  .review-side-panel {
    width: 100% !important;
    max-width: var(--board-size);
    height: auto !important;
    max-height: 40vh !important;
    flex-shrink: 1;
  }
  
  .lesson-info {
    padding: var(--space-md);
  }

  /* Horizontal Evaluation Bar for Mobile/Tablet */
  .eval-bar {
    width: var(--board-size) !important;
    height: 14px !important;
    flex-direction: row !important;
    margin-bottom: var(--space-sm) !important;
    border-radius: var(--radius-sm) !important;
  }
  .eval-bar-fill {
    height: 100% !important;
    width: var(--eval-pct, 50%) !important;
    bottom: 0 !important;
    left: 0 !important;
    right: auto !important;
    background: linear-gradient(to right, #f0e6d6, #e8e0d4) !important;
    transition: width var(--transition-slow) !important;
  }
  .eval-bar-label {
    writing-mode: horizontal-tb !important;
    text-orientation: normal !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    font-size: 0.65rem !important;
  }
  .eval-bar-label.top {
    right: 8px !important;
    left: auto !important;
    color: var(--color-text-dim) !important;
  }
  .eval-bar-label.bottom {
    left: 8px !important;
    right: auto !important;
    bottom: auto !important;
    color: #444 !important;
  }

  /* Prevent main page scrolling and stack elements dynamically */
  #screen-lesson .screen-content {
    overflow: hidden !important;
    display: flex;
    flex-direction: column;
    padding: var(--space-xs) !important;
    padding-top: 0 !important;
  }
  #screen-review .screen-content {
    overflow: hidden !important;
    display: flex;
    flex-direction: column;
    padding: var(--space-xs) !important;
    padding-top: 0 !important;
  }
  #screen-training.game-active .screen-content,
  #screen-coach.game-active .screen-content {
    overflow: hidden !important;
    display: flex;
    flex-direction: column;
    padding: var(--space-xs) 0 !important; /* Remove side padding to let the board fill width */
    padding-top: 0 !important; /* Fit screen without scrolling */
  }

  /* Flexible views that fit perfectly on screen */
  #screen-training.game-active .training-game,
  #screen-coach.game-active .training-game,
  #screen-lesson .lesson-view,
  #screen-review .review-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
    justify-content: flex-start;
    padding: 0 !important;
    gap: var(--space-xs) !important;
  }

  #screen-training.game-active .game-board-area,
  #screen-coach.game-active .game-board-area,
  #screen-lesson .game-board-area,
  #screen-review .game-board-area {
    flex: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    gap: 0 !important;
  }

  #screen-training.game-active .game-side-panel,
  #screen-coach.game-active .game-side-panel,
  #screen-lesson .lesson-side-panel,
  #screen-review .review-side-panel,
  #screen-coach-review .review-side-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    height: auto !important;
    max-height: 40vh !important;
    width: 100% !important;
    max-width: var(--board-size);
    gap: var(--space-xs) !important;
  }

  /* Hide Chesser on all playing screens to optimize space */
  #screen-training.game-active .chesser-assistant,
  #screen-lesson .chesser-assistant,
  #screen-review .chesser-assistant,
  #screen-puzzles .chesser-assistant {
    display: none !important;
  }

  /* Generic moves list horizontal scroll (chess.com style) */
  .move-list-panel {
    background: transparent !important;
    border: none !important;
    backdrop-filter: none !important;
    min-height: 0 !important;
    max-height: none !important;
    height: 38px !important;
    flex: none !important;
    margin: 0 !important;
    box-shadow: none !important;
  }
  .move-list-header {
    display: none !important;
  }
  .move-list {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    gap: var(--space-xs) !important;
    padding: 4px 0 !important;
    height: 100% !important;
    align-items: center !important;
    scrollbar-width: none !important;
  }
  .move-list::-webkit-scrollbar {
    display: none !important;
  }
  .move-row {
    display: inline-flex !important;
    flex-direction: row !important;
    align-items: center !important;
    flex-shrink: 0 !important;
    gap: 4px !important;
    padding: 0 var(--space-sm) !important;
    margin: 0 !important;
    background: rgba(223, 189, 131, 0.05) !important;
    border: 1px solid var(--glass-border) !important;
    border-radius: var(--radius-sm) !important;
    height: 30px;
  }
  .move-number {
    color: var(--color-accent-gold) !important;
    font-weight: 600 !important;
    margin-right: 2px;
    font-size: 0.8rem !important;
    width: auto !important;
  }
  .move-white, .move-black {
    font-size: 0.8rem !important;
    font-weight: 500 !important;
    padding: 1px 4px !important;
    border-radius: var(--radius-xs) !important;
    color: var(--color-text-secondary) !important;
  }
  .move-white.active, .move-black.active {
    background: var(--color-accent-gold) !important;
    color: var(--color-bg-primary) !important;
    font-weight: 700 !important;
  }

  /* Free Training active game additions */
  #screen-training.game-active,
  #screen-coach.game-active {
    --board-size: min(450px, 96vw, 42vh) !important;
  }
  #screen-training.game-active .turn-indicator,
  #screen-coach.game-active .turn-indicator {
    padding: 4px var(--space-sm) !important;
    margin: 0 !important;
    font-size: 0.8rem !important;
  }
  #screen-training.game-active .game-actions,
  #screen-coach.game-active .game-actions {
    display: flex;
    flex-direction: row !important;
    flex-wrap: nowrap;
    gap: var(--space-xs) !important;
    width: 100%;
    margin-top: 0 !important;
  }
  #screen-training.game-active .game-actions .btn,
  #screen-coach.game-active .game-actions .btn {
    padding: var(--space-xs) !important;
    font-size: 0.75rem !important;
    flex: 1;
    min-width: 0;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  #screen-training.game-active .game-actions .btn span,
  #screen-coach.game-active .game-actions .btn span {
    display: none !important;
  }

  /* Lesson screen specific optimizations */
  #screen-lesson .lesson-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding: var(--space-sm) !important;
    gap: var(--space-xs) !important;
    margin: 0 !important;
    border-radius: var(--radius-md) !important;
  }
  #screen-lesson .lesson-info-title {
    display: none !important; /* Title is already in the screen header */
  }
  #screen-lesson .lesson-progress-bar {
    margin-bottom: var(--space-xs) !important;
  }
  #screen-lesson .lesson-step-counter {
    margin-bottom: var(--space-xs) !important;
    font-size: 0.75rem !important;
  }
  #screen-lesson .lesson-step-text {
    flex: 1;
    overflow-y: auto !important;
    margin-bottom: var(--space-xs) !important;
    font-size: 0.85rem !important;
    line-height: 1.4 !important;
  }
  #screen-lesson .lesson-prompt {
    margin-bottom: var(--space-xs) !important;
    padding: var(--space-xs) !important;
    font-size: 0.8rem !important;
  }
  #screen-lesson .lesson-nav {
    margin-top: auto !important;
    gap: var(--space-xs) !important;
  }
  #screen-lesson .lesson-nav .btn {
    height: 36px !important;
    padding: var(--space-xs) !important;
    font-size: 0.8rem !important;
  }

  /* Review screen specific optimizations */
  #screen-review .review-move-info {
    flex: 1;
    overflow-y: auto !important;
    padding: var(--space-sm) !important;
    margin: 0 !important;
    font-size: 0.82rem !important;
    background: rgba(223, 189, 131, 0.03) !important;
    border: 1px solid var(--glass-border) !important;
    border-radius: var(--radius-md) !important;
  }
  #screen-review .review-nav-buttons {
    display: flex !important;
    gap: var(--space-xs) !important;
    justify-content: center !important;
    width: 100% !important;
    margin-top: auto !important;
  }
  #screen-review .review-nav-buttons .btn {
    flex: 1 !important;
    max-width: 60px !important;
    height: 36px !important;
  }
}

/* Mobile Screens */
@media (max-width: 767px) {
  /* Trail nodes take full width and disable absolute barbell spacing */
  .trail-node {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
  }
  
  /* Library controls optimization */
  .library-controls {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
  }
  .library-search {
    width: 100% !important;
  }
  .library-filter {
    width: 100% !important;
    display: flex;
    gap: var(--space-sm);
  }
  .library-filter select {
    flex: 1;
    min-width: 0;
  }

  /* Padding adjustments for Settings/Library screen content */
  #screen-settings .screen-content,
  #screen-library .screen-content {
    padding-top: 20px !important;
  }

  /* Prevent pre-game training menu overflow */
  .training-setup {
    width: 100% !important;
    padding: var(--space-md) !important;
    gap: var(--space-md) !important;
    box-sizing: border-box !important;
  }
}

/* Very small mobile screens and heights */
@media (max-width: 576px) {
  :root {
    --board-size: min(340px, 94vw, 45vh);
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 20px;
    --space-2xl: 24px;
    --radius-lg: 12px;
    --radius-md: 8px;
  }

  /* Main Menu compact adjustments */
  #screen-menu {
    padding: var(--space-md) var(--space-sm) !important;
    justify-content: center !important;
  }
  .menu-logo {
    margin-top: var(--space-xs) !important;
    margin-bottom: var(--space-xs) !important;
  }
  .menu-logo h1 {
    font-size: 1.8rem !important;
  }
  .menu-logo .tagline {
    font-size: 0.75rem !important;
  }
  .menu-nav {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    grid-template-rows: repeat(3, auto) !important;
    gap: var(--space-xs) !important;
    max-width: 320px !important;
    margin-top: var(--space-md) !important;
    margin-bottom: var(--space-md) !important;
  }
  .menu-card {
    padding: var(--space-sm) var(--space-xs) !important;
    border-radius: var(--radius-md) !important;
    width: 100% !important;
    max-width: 160px !important;
  }
  .menu-card .card-icon {
    width: 32px !important;
    height: 32px !important;
    font-size: 1.2rem !important;
  }
  .menu-card .card-title {
    font-size: 0.85rem !important;
  }
  .menu-card .card-desc {
    display: none !important;
  }
  .menu-chesser {
    margin-top: var(--space-xs) !important;
    gap: var(--space-xs) !important;
    max-width: 320px !important;
  }
  .menu-chesser-avatar {
    width: 38px !important;
    height: 38px !important;
  }
  .menu-chesser-bubble {
    font-size: 0.75rem !important;
    padding: var(--space-xs) var(--space-sm) !important;
  }

  /* Library grid and cards */
  .library-grid {
    gap: var(--space-md) !important;
  }
  .lesson-card {
    border-radius: var(--radius-md) !important;
  }
  .lesson-card-body {
    padding: var(--space-sm) !important;
  }
  .lesson-card-title {
    font-size: 1rem !important;
  }
  .lesson-card-desc {
    font-size: 0.8rem !important;
    margin-bottom: var(--space-sm) !important;
  }

  /* Header adjustments */
  .screen-header {
    min-height: 52px;
  }
  .screen-header h2 {
    font-size: 1.15rem;
    padding: 0 48px !important;
  }
  .btn-back {
    padding: var(--space-xs) !important;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
  }
  .btn-back span {
    display: none !important;
  }

  /* Settings screen wrap optimization */
  .settings-row {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
  }
  .settings-slider-wrap {
    min-width: 0;
    width: 100%;
  }
  .theme-selector {
    justify-content: space-between;
    width: 100%;
  }

  /* Floating music player mobile layout */
  .music-player-widget {
    bottom: 12px;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    width: 320px !important;
    max-width: 95vw !important;
    padding: 8px 32px 8px 12px !important;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    min-height: 52px;
    height: auto !important;
    border-radius: var(--radius-md);
    gap: var(--space-xs);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), var(--shadow-gold) !important;
  }
  .music-btn-minimize {
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
  }
  .music-player-controls {
    margin-top: 0;
    flex-shrink: 0;
    gap: 4px !important;
  }
  .music-btn {
    width: 28px !important;
    height: 28px !important;
  }
  .music-player-track {
    flex: 1;
    min-width: 0;
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    height: 100% !important;
  }
  .music-track-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
    gap: 1px;
  }
  .music-track-title {
    font-size: 0.72rem !important;
    line-height: 1.2 !important;
    margin: 0 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }
  .music-track-author {
    font-size: 0.6rem !important;
    line-height: 1.2 !important;
    margin: 0 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    opacity: 0.75;
  }

  /* Free Training active game screen-lock layout constraints */
  #screen-training.game-active,
  #screen-coach.game-active {
    --board-size: min(480px, 99vw, 46vh) !important;
  }
}

/* ============================================
   AUTH BAR & MODAL STYLING
   ============================================ */

.menu-auth-bar {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

#menu-user-profile {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-bg-secondary);
  border: 1px solid var(--glass-border);
  padding: 10px 16px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  user-select: none;
  outline: none;
  height: 44px;
  box-sizing: border-box;
}

#btn-menu-credits, #btn-menu-login, #btn-menu-logout {
  height: 44px;
  box-sizing: border-box;
  border-radius: var(--radius-lg) !important;
}

#menu-user-profile:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(212, 175, 55, 0.4);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3), 0 0 10px rgba(212, 175, 55, 0.15);
}

#menu-user-profile:active {
  transform: translateY(1px);
}

#menu-user-profile.premium-user {
  border-color: var(--color-accent-gold);
  background: rgba(212, 175, 55, 0.04);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4), 0 0 15px rgba(212, 175, 55, 0.2);
}

#menu-user-profile.premium-user:hover {
  background: rgba(212, 175, 55, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), 0 0 20px rgba(212, 175, 55, 0.35);
}

.profile-info-wrapper {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-sm);
  margin-right: 8px;
}

.profile-badge {
  font-size: 0.65rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-secondary);
}

#menu-user-profile.premium-user .profile-badge {
  background: var(--color-accent-gold);
  color: #120e0b;
}

.user-greeting {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.user-greeting strong {
  color: var(--color-accent-gold);
}

/* Auth Modal Card (Glassmorphic) */
.auth-card {
  position: relative;
  background: rgba(18, 14, 11, 0.85) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  border-radius: var(--radius-lg);
  padding: var(--space-xl) !important;
  max-width: 380px !important;
  width: 90%;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6) !important;
}

.auth-close-btn {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  transition: color var(--transition-base);
  line-height: 1;
}

.auth-close-btn:hover {
  color: var(--color-error);
}

.auth-tabs {
  display: flex;
  border-bottom: 2px solid rgba(255, 255, 255, 0.05);
  margin-bottom: var(--space-lg);
  gap: var(--space-md);
}

.auth-tab {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  padding: var(--space-xs) 0;
  cursor: pointer;
  position: relative;
  transition: color var(--transition-base);
}

.auth-tab:hover {
  color: var(--color-text-primary);
}

.auth-tab.active {
  color: var(--color-accent-gold);
}

.auth-tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent-gold);
  border-radius: var(--radius-full);
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group input {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-text-primary);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  transition: all var(--transition-base);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-accent-gold);
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15);
}

.btn-block {
  width: 100%;
  padding: 10px var(--space-md);
  margin-top: var(--space-xs);
}

/* Password Strength Indicator */
.password-strength-meter {
  height: 4px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  margin-top: 4px;
  overflow: hidden;
}

.strength-bar {
  height: 100%;
  width: 0%;
  background: var(--color-error);
  transition: all 0.3s ease;
}

.strength-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

/* Responsive adjustments */
@media (max-width: 576px) {
  .menu-auth-bar {
    top: var(--space-sm);
    right: var(--space-sm);
  }
  
  .user-greeting {
    display: none; /* Hide greeting to save space on mobile */
  }

  #menu-user-profile {
    padding: 6px 12px;
    height: 36px;
  }
  #btn-menu-credits, #btn-menu-login, #btn-menu-logout {
    height: 36px;
    border-radius: var(--radius-lg) !important;
  }
}

.btn-node-train.completed {
  border-color: rgba(74, 189, 122, 0.4);
  color: #4abd7a;
}
.btn-node-train.completed:hover {
  background: #4abd7a;
  color: var(--color-bg-primary);
  border-color: #4abd7a;
  box-shadow: 0 0 12px rgba(74, 189, 122, 0.5);
}

/* Password UX Additions */
.password-input-container {
  position: relative;
  display: flex;
  width: 100%;
}

.password-input-container input {
  width: 100% !important;
  padding-right: 42px !important;
}

.password-toggle-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  width: 32px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  padding: 0;
}

.password-toggle-btn:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.password-requirements {
  list-style: none;
  padding: 0;
  margin: var(--space-xs) 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.password-requirements li {
  font-size: 0.75rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast);
}

.password-requirements li.met {
  color: #4abd7a;
}

.password-requirements li.unmet {
  color: var(--color-text-secondary);
}

/* Guest Warning Banner Styling */
.guest-warning-banner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(232, 120, 48, 0.08);
  border: 1px solid rgba(232, 120, 48, 0.25);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  font-size: 0.85rem;
  color: #e87830;
  box-shadow: var(--shadow-sm);
  animation: fadeIn 0.4s ease-out;
}

.guest-warning-banner .warning-icon {
  flex-shrink: 0;
  stroke: #e87830;
}

.guest-warning-banner a {
  color: var(--color-accent-gold) !important;
  text-decoration: underline !important;
  font-weight: 600;
}

.guest-warning-banner a:hover {
  color: var(--color-accent-amber) !important;
}

/* ============================================
   PROFILE MODAL & ACCOUNT MANAGEMENT STYLING
   ============================================ */

.profile-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: var(--space-md);
}

.profile-avatar {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-accent-gold);
  border-radius: var(--radius-full);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.profile-title-wrapper {
  text-align: left;
}

.profile-name {
  font-size: 1.4rem;
  margin: 0;
  color: var(--color-text-primary);
  font-family: var(--font-display);
}

.profile-email {
  font-size: 0.9rem;
  margin: 2px 0 0 0;
  color: var(--color-text-secondary);
}

.profile-tabs {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 4px;
}

.profile-tab {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: bold;
  padding: 8px 16px;
  cursor: pointer;
  position: relative;
  transition: color 0.2s ease;
}

.profile-tab:hover {
  color: var(--color-text-primary);
}

.profile-tab.active {
  color: var(--color-accent-gold);
}

.profile-tab.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent-gold);
  border-radius: 2px;
}

.subscription-section {
  display: flex;
  gap: var(--space-md);
  width: 100%;
}

@media (max-width: 580px) {
  .subscription-section {
    flex-direction: column;
  }
}

.plan-card {
  flex: 1;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: left;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.plan-card.highlighted {
  background: rgba(212, 175, 55, 0.03);
  border-color: rgba(212, 175, 55, 0.2);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.plan-card.highlighted:hover {
  border-color: rgba(212, 175, 55, 0.4);
  box-shadow: 0 6px 25px rgba(212, 175, 55, 0.08);
}

.plan-card.active-plan {
  background: rgba(212, 175, 55, 0.05);
  border-color: var(--color-accent-gold);
  position: relative;
  overflow: hidden;
}

.plan-badge-active {
  position: absolute;
  top: 32px;
  right: -28px;
  background: var(--color-accent-gold);
  color: #120e0b;
  font-size: 0.62rem;
  font-weight: bold;
  padding: 4px 40px;
  transform: rotate(45deg);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-align: center;
}

.plan-header {
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.plan-card.highlighted .plan-header {
  color: var(--color-accent-gold);
}

.plan-price {
  font-size: 1.6rem;
  font-weight: bold;
  margin-bottom: var(--space-md);
}

.price-period {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  font-weight: normal;
}

.plan-features {
  list-style-type: none;
  padding-left: 0;
  margin: 0 0 var(--space-lg) 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.plan-features li {
  margin-bottom: 6px;
}

.subscription-details {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  text-align: left;
}

/* Secondary Cancel/Action Buttons */
.btn-danger-ghost {
  background: transparent;
  color: var(--color-error);
  border: 1px solid rgba(235, 87, 87, 0.3);
  padding: 10px;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
}

.btn-danger-ghost:hover {
  background: rgba(235, 87, 87, 0.1);
  border-color: var(--color-error);
}

/* Profile Modal Width Override */
.profile-card {
  max-width: 680px !important;
}

/* ==========================================================================
   Puzzles Screen layout and styling
   ========================================================================== */
.puzzles-view {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  align-items: flex-start;
  padding: var(--space-md);
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
}

.puzzles-side-panel {
  width: 340px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-lg);
}

.puzzle-card-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: var(--space-sm);
}

.puzzle-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.puzzle-rating-badge {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--color-text-secondary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.85rem;
}

.puzzle-streak-badge {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.85rem;
}

.puzzle-themes-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.puzzle-theme-tag {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: capitalize;
}

.puzzle-filters {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: var(--space-md);
}

.puzzle-filters .filter-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.puzzle-filters label {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.puzzle-filters select {
  width: 100%;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  color: var(--color-text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-base);
}

.puzzle-filters select:focus {
  border-color: var(--color-accent-gold);
}

.puzzle-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
}

.puzzle-actions #btn-puzzle-next {
  grid-column: span 2;
  margin-top: 4px;
}

@media (max-width: 992px) {
  .puzzles-view {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }
  
  .puzzles-side-panel {
    max-width: var(--board-size);
    margin: 0 auto;
    width: 100%;
  }
}

/* ==============================================================================
   CHESSER COACH SCREEN
   ============================================================================== */

.coach-move-list-minimized {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 6px var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  overflow-x: auto;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  flex-shrink: 0;
}

.coach-move-list-minimized span {
  flex-shrink: 0;
}

.coach-move-list-minimized .move-white,
.coach-move-list-minimized .move-black {
  flex: none;
  display: inline-block;
  padding: 2px 6px;
}

.coach-move-list-minimized::-webkit-scrollbar {
  height: 4px;
}

.coach-move-list-minimized::-webkit-scrollbar-track {
  background: transparent;
}

.coach-move-list-minimized::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
}

.coach-chat-panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 0;
  position: relative;
}

.coach-chat-header {
  background: rgba(255, 255, 255, 0.02);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.coach-chat-header .coach-status-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 6px #22c55e;
}

.coach-chat-header h4 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.88rem;
  color: var(--color-text-primary);
  font-weight: 600;
}

.coach-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-height: 0;
}

.coach-chat-messages::-webkit-scrollbar {
  width: 5px;
}

.coach-chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.coach-chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
}

.coach-message {
  max-width: 85%;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  line-height: 1.4;
  word-wrap: break-word;
  animation: fadeIn 0.2s ease-out;
}

.coach-message.coach {
  background: rgba(219, 178, 74, 0.08);
  border: 1px solid rgba(219, 178, 74, 0.15);
  color: var(--color-text-primary);
  align-self: flex-start;
  border-bottom-left-radius: 2px;
}

.coach-message.user {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--color-text-primary);
  align-self: flex-end;
  border-bottom-right-radius: 2px;
}

/* Typing indicator animation */
.coach-message.typing-indicator {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 10px 14px;
}

.typing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(219, 178, 74, 0.6);
  animation: typingBounce 1.2s ease-in-out infinite;
}

.typing-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Disabled state for chat input */
.coach-chat-input-area input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.coach-chat-input-area button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.coach-chat-input-area {
  padding: 6px 10px;
  border-top: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.1);
  display: flex;
  gap: 8px;
  flex: none;
}

.coach-chat-input-area input {
  flex: 1;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  color: var(--color-text-primary);
  font-size: 0.82rem;
  outline: none;
  font-family: var(--font-body);
  height: 30px;
  box-sizing: border-box;
}

.coach-chat-input-area input:focus {
  border-color: var(--color-accent-gold-dim);
}

.coach-chat-input-area .btn-send {
  padding: 0;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-gold);
  color: var(--color-bg-primary);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  height: 30px;
  width: 36px;
  flex-shrink: 0;
}

.coach-chat-input-area .btn-send:hover {
  background: var(--color-accent-gold-dim);
  box-shadow: 0 0 8px rgba(219, 178, 74, 0.3);
}

.coach-chat-input-area .btn-send svg {
  stroke: var(--color-bg-primary);
}

/* Specific theme overrides */
.theme-cyberpunk .coach-chat-header .coach-status-dot {
  background: var(--color-accent-cyber);
  box-shadow: 0 0 6px var(--color-accent-cyber);
}
.theme-cyberpunk .coach-message.coach {
  background: rgba(236, 72, 153, 0.08);
  border-color: rgba(236, 72, 153, 0.2);
}
.theme-cyberpunk .coach-chat-input-area .btn-send {
  background: var(--color-accent-cyber);
  color: #000;
}
.theme-cyberpunk .coach-chat-input-area .btn-send svg {
  stroke: #000;
}

.theme-pixel .coach-chat-header .coach-status-dot {
  background: var(--color-accent-pixel);
  box-shadow: 0 0 6px var(--color-accent-pixel);
  border-radius: 0;
}
.theme-pixel .coach-message.coach {
  background: transparent;
  border: 2px double var(--color-accent-pixel);
}
.theme-pixel .coach-chat-input-area .btn-send {
  background: var(--color-accent-pixel);
  border: 2px solid var(--color-accent-pixel);
  border-radius: 0;
}
.theme-pixel .coach-chat-input-area input {
  border-radius: 0;
  border: 2px solid var(--glass-border);
}

@media (max-width: 992px) {
  .coach-chat-messages {
    max-height: 250px;
  }
}


/* ===========================================
   GAMIFICATION — Menu Pill Buttons
   =========================================== */
.menu-gamification-pills {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: var(--space-sm);
  margin-bottom: var(--space-md);
}

.gamification-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  color: var(--color-text-dim);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: all 0.3s ease;
}

.gamification-pill:hover {
  border-color: var(--color-accent-gold);
  color: var(--color-accent-gold);
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.15);
}

.pill-league-icon {
  font-size: 16px;
}

.pill-streak-count {
  background: var(--color-accent-gold);
  color: var(--color-bg);
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.pill-streak.streak-active .fire-icon {
  color: #ff6b35;
  filter: drop-shadow(0 0 4px rgba(255, 107, 53, 0.5));
}

.pill-streak.streak-active .fire-icon path {
  fill: #ff6b35;
}


/* ===========================================
   GAMIFICATION — Ranking Screen (#screen-ranking)
   =========================================== */
.ranking-container {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* --- League Name Header --- */
.ranking-league-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
}

.ranking-league-icon {
  font-size: 36px;
}

.ranking-league-name {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent-gold);
}

.ranking-timer {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
}

.ranking-timer .countdown-value {
  color: var(--color-accent-gold);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: var(--font-size-md);
}

.ranking-my-stats {
  display: flex;
  justify-content: space-around;
  padding: var(--space-md);
}

.my-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.my-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-dim);
}

.my-stat-value {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-accent-gold);
}

/* --- League Tabs --- */
.ranking-league-tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.ranking-league-tabs::-webkit-scrollbar {
  display: none;
}

.league-tab {
  flex-shrink: 0;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--color-border-subtle);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--color-text-dim);
}

.league-tab:hover {
  border-color: var(--color-accent-gold);
  color: var(--color-text-primary);
}

.league-tab.active {
  background: var(--color-accent-gold);
  color: var(--color-bg);
  border-color: var(--color-accent-gold);
}

.league-tab-icon {
  font-size: 16px;
}

.league-tab-name {
  font-size: var(--font-size-xs);
}

/* --- Ranking Table --- */
.ranking-table {
  overflow: hidden;
}

.ranking-table-header {
  display: grid;
  grid-template-columns: 50px 1fr 80px;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-subtle);
  font-size: var(--font-size-xs);
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ranking-row {
  display: grid;
  grid-template-columns: 50px 1fr 80px;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  transition: background 0.2s ease;
  align-items: center;
}

.ranking-row:hover {
  background: rgba(255, 255, 255, 0.03);
}

.ranking-row-me {
  background: rgba(212, 175, 55, 0.08);
  border-left: 3px solid var(--color-accent-gold);
}

.ranking-row-me:hover {
  background: rgba(212, 175, 55, 0.12);
}

/* Hide the zone indicator column (zones now shown as divider lines) */
.rank-zone-indicator {
  display: none;
}

/* --- Zone Divider Lines (Duolingo/Chess.com style) --- */
.zone-divider {
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  gap: var(--space-sm);
}

.zone-divider::before,
.zone-divider::after {
  content: '';
  flex: 1;
  height: 2px;
}

.zone-divider-promote::before,
.zone-divider-promote::after {
  background: linear-gradient(90deg, transparent, #4ade80, transparent);
}

.zone-divider-demote::before,
.zone-divider-demote::after {
  background: linear-gradient(90deg, transparent, #f87171, transparent);
}

.zone-divider-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 6px 14px;
  border-radius: 12px;
  white-space: nowrap;
  flex-shrink: 0;
}

.zone-divider-promote .zone-divider-label {
  color: #4ade80;
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.2);
}

.zone-divider-demote .zone-divider-label {
  color: #f87171;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.2);
}

.rank-medal {
  font-size: 18px;
}

.rank-position {
  font-weight: 600;
}

.ranking-empty {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-dim);
}


/* ===========================================
   GAMIFICATION — Streaks Screen (#screen-streaks)
   =========================================== */
.streaks-container {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* --- Streak Hero --- */
.streak-hero {
  text-align: center;
  padding: var(--space-lg);
}

.streak-fire {
  margin: 0 auto;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.1);
  color: var(--color-text-dim);
  transition: all 0.3s ease;
}

.streak-fire .fire-icon {
  width: 52px;
  height: 52px;
  transition: all 0.3s ease;
}

.streak-fire.active {
  color: #ff6b35;
  background: rgba(255, 107, 53, 0.15);
  animation: firePulse 2s ease-in-out infinite;
}

.streak-fire.active .fire-icon,
.streak-fire.active .fire-icon path {
  stroke: #ff6b35;
  fill: rgba(255, 107, 53, 0.25);
}

.streak-fire:not(.active) .fire-icon,
.streak-fire:not(.active) .fire-icon path {
  stroke: var(--color-text-dim);
  fill: none;
  opacity: 0.4;
}

.streak-value {
  font-size: 48px;
  font-weight: 800;
  color: var(--color-accent-gold);
  margin-top: var(--space-sm);
}

.streak-label {
  color: var(--color-text-dim);
  font-size: var(--font-size-sm);
}

@keyframes firePulse {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 0 8px rgba(255, 107, 53, 0.3));
  }
  50% {
    transform: scale(1.1);
    filter: drop-shadow(0 0 16px rgba(255, 107, 53, 0.6));
  }
}

/* --- Streak Stats Grid --- */
.streak-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.streak-stat-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
}

.stat-icon {
  font-size: 24px;
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-dim);
}

.stat-value {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-text-primary);
}

/* --- Streak Timer --- */
.streak-timer {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
}

.streak-timer .countdown-value {
  color: var(--color-accent-gold);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: var(--font-size-md);
}

/* --- Streak Calendar --- */
.streak-calendar-section {
  padding: var(--space-md);
}

.streak-calendar-section h3 {
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-dim);
}

.streak-calendar {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
}

.calendar-cell {
  aspect-ratio: 1;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--color-text-dim);
  transition: all 0.2s ease;
}

.calendar-cell.active {
  background: var(--color-accent-gold);
  color: var(--color-bg);
  font-weight: 700;
}

.calendar-cell.today {
  outline: 2px solid var(--color-accent-gold);
  outline-offset: 1px;
}

.calendar-day-label {
  pointer-events: none;
}


/* ===========================================
   GAMIFICATION — Responsive
   =========================================== */
@media (max-width: 480px) {
  .ranking-table-header,
  .ranking-row {
    grid-template-columns: 40px 1fr 60px;
  }

  .streak-stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .streak-calendar {
    grid-template-columns: repeat(7, 1fr);
  }

  .menu-gamification-pills {
    flex-wrap: wrap;
  }
}