/* ============================================================
   CHESS DUEL — chess.css
   Premium dark-mode chess UI — Pro Edition
   ============================================================ */

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

:root {
  --font: 'Outfit', system-ui, sans-serif;
  --bg: #0a0e1a;
  --surface: rgba(255,255,255,0.045);
  --border: rgba(255,255,255,0.1);
  --text: #e8eef8;
  --muted: rgba(200,215,240,0.55);
  --light-sq: #e8dcc8;
  --dark-sq: #7b6b4f;
  --light-sq-hover: #f0e8d6;
  --dark-sq-hover: #8d7c5e;
  --selected: rgba(255,215,0,0.55);
  --move-dot: rgba(72,187,120,0.7);
  --capture-dot: rgba(245,66,66,0.65);
  --check-glow: rgba(255,50,50,0.7);
  --last-move: rgba(255,255,100,0.25);
  --accent-gold: #ffd060;
  --accent-green: #48bb78;
  --accent-red: #f54242;
}

/* Board themes */
[data-theme="walnut"] {
  --light-sq: #f0d9b5; --dark-sq: #b58863;
  --light-sq-hover: #f5e2c4; --dark-sq-hover: #c49a75;
}
[data-theme="ocean"] {
  --light-sq: #dee3e6; --dark-sq: #5b8baa;
  --light-sq-hover: #e8ecee; --dark-sq-hover: #6d9bb8;
}
[data-theme="emerald"] {
  --light-sq: #ffffdd; --dark-sq: #5f915f;
  --light-sq-hover: #ffffe8; --dark-sq-hover: #6fa06f;
}
[data-theme="midnight"] {
  --light-sq: #c8c8d4; --dark-sq: #4a4a6a;
  --light-sq-hover: #d4d4de; --dark-sq-hover: #5a5a7a;
}

html, body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ======== OVERLAYS ======== */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4,6,16,0.92);
  backdrop-filter: blur(16px);
}

.overlay-card {
  background: linear-gradient(170deg, #151b2e 0%, #0e1220 100%);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 48px;
  max-width: 560px;
  width: 92vw;
  text-align: center;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.06);
}

/* Logo */
.game-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
}

.logo-chess-icon {
  font-size: 3.5rem;
  filter: drop-shadow(0 0 24px rgba(255,215,0,0.5));
  animation: floatIcon 3s ease-in-out infinite;
}

@keyframes floatIcon {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.logo-chess {
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  background: linear-gradient(135deg, #ffd700 0%, #ffaa00 50%, #ff8800 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-duel {
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: #fff;
  margin-left: 6px;
}

.game-tagline {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 32px;
}

/* Setup section */
.setup-section {
  margin-bottom: 24px;
}

.settings-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-gold);
  margin-bottom: 12px;
}

.timer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.timer-opt {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 8px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.2s;
}

.timer-opt input { display: none; }

.timer-opt.selected,
.timer-opt:has(input:checked) {
  background: rgba(255,215,0,0.15);
  border-color: rgba(255,215,0,0.5);
  box-shadow: 0 0 16px rgba(255,215,0,0.15);
}

.timer-name {
  font-size: 0.8rem;
  font-weight: 600;
}

/* ── Toggle options ── */
.setup-toggles {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toggle-opt {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
}

.toggle-opt:hover {
  background: rgba(255,255,255,0.06);
}

.toggle-opt input { display: none; }

.toggle-switch {
  position: relative;
  width: 40px;
  height: 22px;
  background: rgba(255,255,255,0.12);
  border-radius: 100px;
  transition: background 0.25s;
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background: #888;
  border-radius: 50%;
  transition: all 0.25s cubic-bezier(0.34,1.56,0.64,1);
}

.toggle-opt input:checked ~ .toggle-switch {
  background: rgba(255,215,0,0.3);
}

.toggle-opt input:checked ~ .toggle-switch::after {
  left: 21px;
  background: var(--accent-gold);
  box-shadow: 0 0 8px rgba(255,215,0,0.4);
}

.toggle-label {
  font-size: 0.88rem;
  font-weight: 600;
}

/* ── Theme swatches ── */
.theme-grid {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.theme-swatch {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 2px solid var(--border);
  cursor: pointer;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  overflow: hidden;
  transition: all 0.2s;
  background: none;
  padding: 0;
}

.theme-swatch:hover {
  transform: scale(1.1);
  border-color: rgba(255,255,255,0.3);
}

.theme-swatch.selected {
  border-color: var(--accent-gold);
  box-shadow: 0 0 12px rgba(255,215,0,0.3);
  transform: scale(1.08);
}

.swatch-light, .swatch-dark {
  display: block;
}

.swatch-light:first-child { border-radius: 8px 0 0 0; }
.swatch-dark:nth-child(2) { border-radius: 0 8px 0 0; }

.how-to-play {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 20px;
}

.how-to-play p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 8px;
}

.how-to-play p:last-child { margin-bottom: 0; }

.how-to-play strong {
  color: var(--accent-gold);
}

/* Buttons */
.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, #d4a017, #b8860b);
  color: #1a1200;
  font-family: var(--font);
  font-weight: 800;
  font-size: 1.1rem;
  padding: 14px 40px;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: transform 0.18s, filter 0.18s, box-shadow 0.18s;
  box-shadow: 0 4px 24px rgba(212,160,23,0.3);
  margin-top: 8px;
}

.btn-primary:hover {
  transform: scale(1.06);
  filter: brightness(1.15);
  box-shadow: 0 8px 36px rgba(212,160,23,0.45);
}

.btn-primary.btn-sm { padding: 10px 28px; font-size: 0.95rem; }

.btn-secondary {
  display: inline-block;
  background: var(--surface);
  color: var(--text);
  font-family: var(--font);
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 32px;
  border: 1px solid var(--border);
  border-radius: 100px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: transform 0.18s, background 0.18s;
}

.btn-secondary:hover {
  transform: scale(1.04);
  background: rgba(255,255,255,0.08);
}

.btn-secondary.btn-sm { padding: 10px 28px; font-size: 0.95rem; }

.back-link {
  display: block;
  margin-top: 16px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}

.back-link:hover { color: var(--text); }

/* ======== GAME AREA ======== */
.game-area {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: radial-gradient(ellipse at 50% 0%, #151c30 0%, var(--bg) 70%);
}

/* Top Bar */
.top-bar {
  width: 100%;
  max-width: 1100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px 8px;
  gap: 16px;
  flex-wrap: wrap;
}

.top-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 8px 18px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.2s;
}

.top-btn:hover {
  color: var(--text);
  background: rgba(255,255,255,0.08);
}

/* Turn Indicator */
.turn-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 8px 20px;
  font-weight: 700;
  font-size: 0.95rem;
}

.turn-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  box-shadow: 0 0 10px currentColor;
  transition: all 0.3s;
}

.turn-dot--white {
  background: #fff;
  box-shadow: 0 0 12px rgba(255,255,255,0.5);
}

.turn-dot--black {
  background: #333;
  border: 2px solid #888;
  box-shadow: 0 0 12px rgba(100,100,100,0.5);
}

/* Timer */
.timer-display {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 8px 18px;
}

.timer-label {
  font-weight: 700;
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  min-width: 50px;
  text-align: center;
}

.timer-label--white { color: #fff; }
.timer-label--black { color: #aaa; }
.timer-sep { color: var(--border); font-weight: 300; }

.timer-label.timer-low {
  color: var(--accent-red) !important;
  animation: timerPulse 0.6s ease-in-out infinite alternate;
}

@keyframes timerPulse {
  from { opacity: 1; }
  to { opacity: 0.5; }
}

/* ======== TOOLBAR ======== */
.toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  margin-bottom: 8px;
}

.tb-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  padding: 6px 12px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: var(--font);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  border-radius: 12px;
  transition: all 0.2s;
}

.tb-btn:hover:not(:disabled) {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.tb-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.tb-btn--danger:hover:not(:disabled) {
  color: var(--accent-red);
  background: rgba(245,66,66,0.1);
}

.tb-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.tb-label {
  font-size: 0.6rem;
}

.tb-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
  margin: 0 4px;
}

/* ======== SETTINGS DRAWER ======== */
.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
}

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.drawer-panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 340px;
  max-width: 90vw;
  background: linear-gradient(180deg, #151b2e 0%, #0e1220 100%);
  border-left: 1px solid var(--border);
  box-shadow: -8px 0 40px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  animation: slideIn 0.25s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes slideIn {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.drawer-title {
  font-size: 1.1rem;
  font-weight: 800;
}

.drawer-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.drawer-close:hover {
  color: var(--text);
  background: rgba(255,255,255,0.08);
}

.drawer-body {
  padding: 20px 24px;
  flex: 1;
  overflow-y: auto;
}

.drawer-section {
  margin-bottom: 24px;
}

.drawer-section-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-gold);
  margin-bottom: 14px;
}

/* ======== CONFIRM DIALOG ======== */
.confirm-card {
  max-width: 380px;
  padding: 36px 40px;
}

.confirm-emoji {
  font-size: 3rem;
  margin-bottom: 8px;
}

.confirm-title {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.confirm-msg {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
  line-height: 1.5;
}

.confirm-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* ======== Game Content ======== */
.game-content {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
  padding: 0 16px;
  flex-wrap: wrap;
}

/* Captured Pieces Panel */
.captured-panel {
  min-width: 120px;
  max-width: 160px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
}

.captured-header {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.captured-icon { font-size: 0.7rem; }

.material-adv {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--accent-green);
  background: rgba(72,187,120,0.15);
  border: 1px solid rgba(72,187,120,0.3);
  padding: 1px 7px;
  border-radius: 100px;
  display: none;
}

.material-adv.visible {
  display: inline-block;
  animation: advPop 0.3s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes advPop {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

.captured-pieces {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  min-height: 40px;
}

.captured-piece {
  font-size: 1.4rem;
  line-height: 1;
  opacity: 0.85;
  animation: capturedPop 0.3s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes capturedPop {
  from { transform: scale(0); opacity: 0; }
  to { transform: scale(1); opacity: 0.85; }
}

/* Board Wrapper */
.board-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.board-container {
  display: grid;
  grid-template-columns: 28px 1fr;
  grid-template-rows: 1fr 28px;
  gap: 0;
}

.rank-labels {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  padding-right: 4px;
}

.rank-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  height: calc(min(84px, 10vw));
  display: flex;
  align-items: center;
}

.file-labels {
  display: flex;
  justify-content: space-around;
  align-items: center;
  grid-column: 2;
  padding-top: 4px;
}

.file-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  width: calc(min(84px, 10vw));
  text-align: center;
}

/* Chess Board */
.chess-board {
  display: grid;
  grid-template-columns: repeat(8, min(84px, 10vw));
  grid-template-rows: repeat(8, min(84px, 10vw));
  border: 3px solid rgba(255,215,0,0.25);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5), 0 0 80px rgba(255,215,0,0.05);
}

/* Squares */
.square {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
  user-select: none;
  -webkit-user-select: none;
}

.square--light { background: var(--light-sq); }
.square--dark  { background: var(--dark-sq); }

.square--light:hover { background: var(--light-sq-hover); }
.square--dark:hover  { background: var(--dark-sq-hover); }

/* Selected piece */
.square.selected {
  background: var(--selected) !important;
  box-shadow: inset 0 0 20px rgba(255,215,0,0.3);
}

/* Last move highlight */
.square.last-move {
  position: relative;
}

.square.last-move::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--last-move);
  pointer-events: none;
  z-index: 0;
}

.square.just-moved::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 3px solid var(--accent-gold);
  box-shadow: inset 0 0 15px rgba(255,208,96,0.6), 0 0 15px rgba(255,208,96,0.6);
  border-radius: 4px;
  pointer-events: none;
  z-index: 1;
  animation: moveGlowFade 3s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

@keyframes moveGlowFade {
  0% {
    opacity: 1;
    transform: scale(1.02);
  }
  30% {
    transform: scale(1);
  }
  100% {
    opacity: 0.15;
    border-width: 1.5px;
    box-shadow: inset 0 0 4px rgba(255,208,96,0.2);
  }
}


/* King in check */
.square.in-check {
  animation: checkFlash 0.8s ease-in-out infinite alternate;
}

@keyframes checkFlash {
  from { box-shadow: inset 0 0 20px var(--check-glow), 0 0 15px var(--check-glow); }
  to   { box-shadow: inset 0 0 30px var(--check-glow), 0 0 25px var(--check-glow); }
}

/* Pieces */
.piece {
  font-size: min(3.4rem, 8.5vw);
  line-height: 1;
  position: relative;
  z-index: 2;
  cursor: grab;
  transition: transform 0.1s;
}

.piece:hover {
  transform: scale(1.08);
}

.piece.white-piece {
  color: #ffffff;
  text-shadow:
    -1px -1px 0 rgba(0,0,0,0.8),
     1px -1px 0 rgba(0,0,0,0.8),
    -1px  1px 0 rgba(0,0,0,0.8),
     1px  1px 0 rgba(0,0,0,0.8),
     0    2px 4px rgba(0,0,0,0.4);
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.15));
}

.piece.black-piece {
  color: #121316;
  text-shadow:
    -1px -1px 0 rgba(255,255,255,0.85),
     1px -1px 0 rgba(255,255,255,0.85),
    -1px  1px 0 rgba(255,255,255,0.85),
     1px  1px 0 rgba(255,255,255,0.85),
     0    2px 4px rgba(0,0,0,0.6);
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}


/* Move indicators */
.move-dot {
  position: absolute;
  width: 30%;
  height: 30%;
  border-radius: 50%;
  background: var(--move-dot);
  z-index: 3;
  pointer-events: none;
  animation: dotAppear 0.2s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes dotAppear {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

.capture-ring {
  position: absolute;
  width: 85%;
  height: 85%;
  border-radius: 50%;
  border: 4px solid var(--capture-dot);
  z-index: 3;
  pointer-events: none;
  animation: ringAppear 0.25s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes ringAppear {
  from { transform: scale(0.5); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* Special move indicator */
.castle-indicator {
  position: absolute;
  width: 60%;
  height: 60%;
  border-radius: 50%;
  border: 3px dashed var(--accent-gold);
  z-index: 3;
  pointer-events: none;
  opacity: 0.6;
  animation: dotAppear 0.2s cubic-bezier(0.34,1.56,0.64,1);
}

/* Status banner */
.status-banner {
  background: linear-gradient(135deg, rgba(245,66,66,0.2), rgba(255,100,50,0.15));
  border: 1px solid rgba(245,66,66,0.4);
  border-radius: 12px;
  padding: 10px 24px;
  font-weight: 700;
  font-size: 0.95rem;
  color: #ff8888;
  animation: bannerPulse 1.5s ease-in-out infinite alternate;
  text-align: center;
}

@keyframes bannerPulse {
  from { box-shadow: 0 0 10px rgba(245,66,66,0.1); }
  to   { box-shadow: 0 0 20px rgba(245,66,66,0.25); }
}

/* Move History */
.move-history {
  width: 100%;
  max-width: 650px;
  margin: 20px auto 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px 20px;
}

.history-header {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 12px;
}

.history-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  max-height: 120px;
  overflow-y: auto;
  padding-right: 8px;
}

.history-list::-webkit-scrollbar { width: 4px; }
.history-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

.history-move {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  padding: 2px 6px;
  border-radius: 4px;
}

.history-move:nth-child(odd) {
  color: #fff;
}

.history-num {
  color: var(--accent-gold);
  font-weight: 800;
  margin-right: 4px;
  font-size: 0.72rem;
}

/* Promotion overlay */
.promotion-card {
  max-width: 400px;
}

.promotion-title {
  font-size: 1.6rem;
  font-weight: 900;
  margin-bottom: 6px;
  background: linear-gradient(135deg, #ffd700, #ffaa00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.promotion-sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.promotion-choices {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.promotion-choice {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.8rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.2s;
}

.promotion-choice:hover {
  transform: scale(1.12);
  border-color: var(--accent-gold);
  background: rgba(255,215,0,0.12);
  box-shadow: 0 4px 24px rgba(255,215,0,0.2);
}

/* Results */
.results-card {
  max-width: 440px;
}

.results-emoji {
  font-size: 4rem;
  margin-bottom: 12px;
  animation: floatIcon 2s ease-in-out infinite;
}

.results-headline {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #ffd700, #ffaa00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.results-sub {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 28px;
}

.result-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ======== RESPONSIVE ======== */
@media (max-width: 900px) {
  .game-content {
    flex-direction: column;
    align-items: center;
  }
  .captured-panel {
    flex-direction: row;
    max-width: 100%;
    min-width: auto;
    order: 1;
  }
  .board-wrapper { order: 0; }
  #capturedBlack { order: -1; }
}

@media (max-width: 500px) {
  .overlay-card { padding: 28px 20px; }
  .timer-grid { grid-template-columns: repeat(2, 1fr); }
  .top-bar { padding: 10px 12px 4px; }
  .captured-panel { padding: 10px; }
  .move-history { margin: 12px 8px 32px; }
  .toolbar { gap: 2px; padding: 4px 8px; }
  .tb-btn { padding: 4px 8px; }
  .tb-label { display: none; }
}