/* ==========================================================================
   MasterChess Atelier - Global UI, Glassmorphism & Layout Engine
   ========================================================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(245, 158, 11, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* App Header */
.app-header {
  height: 68px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface-glass);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--surface-glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  font-size: 26px;
  color: var(--accent-gold);
  filter: drop-shadow(0 0 10px var(--accent-gold-glow));
}

.brand-title {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.12em;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.mode-nav {
  display: flex;
  gap: 8px;
  background: var(--bg-secondary);
  padding: 4px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-glass-border);
}

.mode-tab {
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.mode-tab:hover {
  color: var(--text-main);
}

.mode-tab.active {
  background: var(--bg-tertiary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-glass-border);
  background: var(--surface-glass);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  background: var(--surface-glass-hover);
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

/* Main Workspace */
.app-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  gap: 32px;
  max-width: 1720px;
  margin: 0 auto;
  width: 100%;
}

/* Arena (Left & Center) */
.arena-container {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
  max-width: 960px;
  justify-content: center;
}

/* Dynamic Live Evaluation Bar */
.eval-bar-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: min(82vh, 860px);
  width: 32px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-glass-border);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-card);
  flex-shrink: 0;
}

.eval-track {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column-reverse;
  position: relative;
  background: #1e293b;
}

.eval-fill {
  width: 100%;
  height: 50%;
  background: linear-gradient(180deg, #f8fafc 0%, #cbd5e1 100%);
  transition: height 0.35s var(--ease-spring);
}

.eval-text {
  position: absolute;
  top: 8px;
  width: 100%;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9);
  pointer-events: none;
  z-index: 10;
}

/* Board Center Column */
.board-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: min(82vh, 860px);
}

/* Player Cards (Opponent & You) */
.player-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}

.bot-change-badge-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: var(--radius-sm);
  color: var(--accent-gold);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.bot-change-badge-btn:hover {
  background: var(--accent-gold);
  color: #000000;
  box-shadow: 0 0 14px var(--accent-gold-glow);
  transform: translateY(-1px);
}

.bot-speech-bubble {
  position: absolute;
  top: calc(100% + 8px);
  left: 20px;
  z-index: 120;
  max-width: 340px;
  padding: 8px 14px;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--accent-gold);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.7), 0 0 10px var(--accent-gold-glow);
  color: #ffffff;
  font-size: 12px;
  font-style: italic;
  animation: pop-bubble 0.25s var(--ease-spring);
  pointer-events: none;
}

.bot-speech-bubble::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 18px;
  width: 10px;
  height: 10px;
  background: rgba(15, 23, 42, 0.95);
  border-left: 1px solid var(--accent-gold);
  border-top: 1px solid var(--accent-gold);
  transform: rotate(45deg);
}

.bot-speech-bubble.hidden {
  display: none !important;
}

@keyframes pop-bubble {
  from { opacity: 0; transform: translateY(-4px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Post-Game Floating Action Bar */
.postgame-bar {
  margin-top: 12px;
  background: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(239, 68, 68, 0.45);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.75), 0 0 24px rgba(239, 68, 68, 0.3);
  animation: slide-up-bar 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 80;
}

.postgame-bar.hidden {
  display: none !important;
}

@keyframes slide-up-bar {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.postgame-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.postgame-badge {
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 800;
  padding: 5px 12px;
  background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
  color: #ffffff;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  box-shadow: 0 0 14px rgba(239, 68, 68, 0.6);
  white-space: nowrap;
}

.postgame-text-group {
  display: flex;
  flex-direction: column;
}

.postgame-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
}

.postgame-desc {
  font-size: 12px;
  color: var(--text-muted);
}

.postgame-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.postgame-btn {
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-glass-border);
  background: var(--surface-glass);
  color: var(--text-main);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.postgame-btn:hover {
  background: var(--surface-glass-hover);
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

.postgame-btn.primary {
  background: linear-gradient(135deg, var(--accent-gold) 0%, #d97706 100%);
  color: #000000;
  border: none;
  font-weight: 700;
}

.postgame-btn.primary:hover {
  box-shadow: 0 0 16px var(--accent-gold-glow);
}

.postgame-btn.icon-only {
  padding: 9px 12px;
  font-weight: 700;
}

/* Sidebar Bot Preview Card */
.bot-preview-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.bot-preview-card:hover {
  border-color: var(--accent-gold);
  background: rgba(245, 158, 11, 0.05);
}

.bot-card-avatar {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: var(--bg-tertiary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.bot-card-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.bot-card-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}

.bot-card-title {
  font-size: 11px;
  color: var(--text-muted);
}

.bot-gallery-trigger-btn {
  padding: 5px 10px;
  font-size: 11px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--surface-glass-border);
  background: var(--surface-glass);
  color: var(--accent-gold);
  cursor: pointer;
  font-weight: 700;
  transition: all 0.2s ease;
}

.bot-gallery-trigger-btn:hover {
  border-color: var(--accent-gold);
  background: var(--surface-glass-hover);
}

/* Bot Selection Modal & Grid */
.bot-gallery-sheet {
  max-width: 820px !important;
  width: 95% !important;
  max-height: 85vh;
  overflow-y: auto;
  text-align: left;
  padding: 28px !important;
}

.modal-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease;
}

.modal-close-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.bot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.bot-card {
  background: var(--bg-primary);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: all 0.22s ease;
  position: relative;
  overflow: hidden;
}

.bot-card:hover {
  border-color: var(--accent-gold);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 12px var(--accent-gold-glow);
}

.bot-card.active {
  border-color: var(--accent-gold);
  background: rgba(245, 158, 11, 0.08);
  box-shadow: inset 0 0 0 1.5px var(--accent-gold);
}

.bot-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.bot-avatar-large {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  flex-shrink: 0;
}

.bot-card-headings {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.bot-card-headings .name {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bot-card-headings .badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-gold);
}

.bot-card-tagline {
  font-size: 12px;
  font-style: italic;
  color: var(--text-main);
  line-height: 1.4;
  min-height: 34px;
}

.bot-card-bio {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
  flex: 1;
}

.bot-select-btn {
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-glass-border);
  background: var(--surface-glass);
  color: var(--text-main);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.bot-card:hover .bot-select-btn {
  background: linear-gradient(135deg, var(--accent-gold) 0%, #d97706 100%);
  color: #000000;
  border-color: transparent;
  box-shadow: 0 0 10px var(--accent-gold-glow);
}

.player-card.active-turn {
  border-color: var(--accent-gold);
  box-shadow: 0 0 16px var(--accent-gold-glow);
}

.player-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.player-avatar {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  border: 1px solid var(--surface-glass-border);
}

.player-details {
  display: flex;
  flex-direction: column;
}

.player-name-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.player-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}

.player-elo {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-gold);
  font-weight: 600;
}

.player-status {
  font-size: 11px;
  color: var(--text-dim);
}

.captured-tray {
  display: flex;
  align-items: center;
  gap: 2px;
  min-height: 20px;
}

.captured-icon img {
  width: 16px;
  height: 16px;
  opacity: 0.85;
}

.material-lead {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-gold);
  margin-left: 6px;
}

/* Digital Chess Clock */
.clock-display {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--surface-glass-border);
  letter-spacing: 0.05em;
  color: #ffffff;
  transition: all 0.2s ease;
}

.clock-display.low-time {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--accent-crimson);
  color: var(--accent-crimson);
  animation: pulse-clock 1s infinite;
}

@keyframes pulse-clock {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* Sidebar / Control Panel */
.sidebar-panel {
  width: 380px;
  min-width: 340px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--surface-glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow-card);
  max-height: min(88vh, 880px);
}

.panel-section-title {
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 8px;
}

/* Engine Level Selector */
.engine-select-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.custom-select {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--surface-glass-border);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  outline: none;
}

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

/* Move List Table */
.move-list-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 220px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-glass-border);
  overflow: hidden;
}

.move-list-header {
  display: grid;
  grid-template-columns: 44px 1fr 1fr;
  padding: 8px 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-dim);
  border-bottom: 1px solid var(--surface-glass-border);
  text-transform: uppercase;
}

.move-list-body {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

.move-row {
  display: grid;
  grid-template-columns: 44px 1fr 1fr;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  align-items: center;
  transition: background 0.15s ease;
}

.move-row:hover {
  background: var(--surface-glass-hover);
}

.move-num {
  color: var(--text-dim);
  font-size: 11px;
}

.move-san {
  padding: 3px 6px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-main);
  font-weight: 500;
  transition: all 0.15s ease;
}

.move-san:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-gold);
}

.move-san.active {
  background: var(--accent-gold);
  color: #000000;
  font-weight: 700;
}

/* History Controls */
.history-controls {
  display: flex;
  gap: 6px;
}

.history-btn {
  flex: 1;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--surface-glass-border);
  color: var(--text-main);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s ease;
}

.history-btn:hover {
  background: var(--surface-glass-hover);
  border-color: var(--accent-gold);
}

/* Tactical Action Buttons */
.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.action-btn {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-glass-border);
  background: var(--surface-glass);
  color: var(--text-main);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:hover {
  background: var(--surface-glass-hover);
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

.action-btn.primary {
  background: linear-gradient(135deg, var(--accent-gold) 0%, #d97706 100%);
  color: #000000;
  border: none;
  font-weight: 700;
}

.action-btn.primary:hover {
  box-shadow: 0 4px 16px var(--accent-gold-glow);
}

/* Modal Sheets */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  opacity: 1;
  transition: opacity 0.25s ease;
}

.modal-overlay.hidden {
  display: none;
  opacity: 0;
}

.modal-sheet {
  background: var(--bg-secondary);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-xl);
  padding: 32px;
  width: 90%;
  max-width: 480px;
  box-shadow: var(--shadow-board);
  text-align: center;
}

.modal-title {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.modal-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* Puzzle Card Info */
.puzzle-info-card {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.puzzle-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.puzzle-title {
  font-weight: 700;
  font-size: 14px;
  color: var(--accent-blue);
}

.puzzle-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
}

.puzzle-desc {
  font-size: 12px;
  color: var(--text-muted);
}

.puzzle-hint-box {
  display: none;
  font-size: 12px;
  color: var(--accent-gold);
  font-weight: 600;
}

.puzzle-hint-box.visible {
  display: block;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .app-main {
    flex-direction: column;
    padding: 16px;
    gap: 20px;
  }
  .sidebar-panel {
    width: 100%;
    max-width: min(82vh, 860px);
  }
  .arena-container {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .app-header {
    padding: 0 16px;
  }
  .brand-title {
    display: none;
  }
  .eval-bar-wrapper {
    width: 18px;
    height: 380px;
  }
  .eval-text {
    display: none;
  }
  .player-card {
    padding: 8px 12px;
  }
  .clock-display {
    font-size: 16px;
    padding: 4px 8px;
  }
}