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

body {
  background: #c8a87a;
  font-family: 'Segoe UI', system-ui, sans-serif;
  color: #e0e0e0;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
}

#game-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* HUD */
#hud {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

#title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 2px;
  color: #a8d8ea;
  text-shadow: 0 1px 4px rgba(0,0,0,0.85), 0 0 10px rgba(0,0,0,0.5);
}

#turn-display {
  font-size: 16px;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.55);
  padding: 6px 12px;
  border-radius: 6px;
  border-left: 3px solid #a8d8ea;
}

#turn-display.black-turn {
  border-left-color: #888;
  color: #bbb;
}

#status-display {
  font-size: 14px;
  font-weight: 600;
  color: #ff6b6b;
  min-height: 20px;
}

#new-game-btn,
#view-toggle-btn,
#undo-btn,
#play-again-btn {
  pointer-events: all;
  background: #2d6a9f;
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s;
  width: 100%;
  text-align: left;
}

#play-again-btn {
  width: fit-content;
  text-align: center;
}

#new-game-btn:hover,
#view-toggle-btn:hover,
#undo-btn:hover,
#play-again-btn:hover {
  background: #3a85c4;
}

#new-game-btn:disabled,
#view-toggle-btn:disabled,
#undo-btn:disabled {
  background: #1e3a55;
  color: #556677;
  cursor: not-allowed;
}

/* "How pieces move" button in dropdown */
#moves-btn {
  pointer-events: all;
  background: none;
  border: none;
  color: #a8d8ea;
  font-size: 13px;
  cursor: pointer;
  text-decoration: underline;
  padding: 6px 16px;
  text-align: left;
  opacity: 0.85;
  transition: opacity 0.15s;
  width: 100%;
}

#moves-btn:hover {
  opacity: 1;
}

/* ── Hamburger menu ─────────────────────────────────────────────────────── */

#hamburger-menu {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10;
}

#hamburger-btn {
  background: rgba(0, 0, 0, 0.55);
  border: none;
  border-radius: 6px;
  padding: 10px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  pointer-events: all;
  transition: background 0.2s;
}

#hamburger-btn:hover {
  background: rgba(0, 0, 0, 0.75);
}

#hamburger-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: #a8d8ea;
  border-radius: 2px;
}

#hamburger-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: #16213e;
  border: 1px solid #2d6a9f;
  border-radius: 8px;
  padding: 8px;
  flex-direction: column;
  gap: 4px;
  min-width: 168px;
  pointer-events: all;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}

#hamburger-dropdown.open {
  display: flex;
}

/* "How pieces move" modal overlay */
#moves-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
}

#moves-modal.hidden {
  display: none;
}

#moves-box {
  background: #16213e;
  border: 1px solid #2d6a9f;
  border-radius: 14px;
  padding: 36px 44px;
  max-width: 580px;
  width: 90vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

#moves-title {
  font-size: 22px;
  font-weight: 700;
  color: #a8d8ea;
}

#moves-subtitle {
  font-size: 13px;
  color: #6699bb;
  text-align: center;
  margin-top: -6px;
}

#moves-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  color: #dde;
}

#moves-table th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #6699bb;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

#moves-table th:first-child {
  width: 24px;
}

#moves-table td {
  padding: 6px 8px 6px 0;
  vertical-align: middle;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

#moves-table td:first-child {
  width: 24px;
  padding-right: 6px;
}

#moves-table td:nth-child(2) {
  font-weight: 600;
  white-space: nowrap;
  padding-right: 16px;
}

#moves-box > button {
  pointer-events: all;
  background: #2d6a9f;
  color: #fff;
  border: none;
  padding: 9px 28px;
  border-radius: 7px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 4px;
}

#moves-box > button:hover {
  background: #3a85c4;
}

.dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.3);
}

.dot.rook     { background: #e07b39; }
.dot.bishop   { background: #9b59b6; }
.dot.knight   { background: #27ae60; }
.dot.queen    { background: #f1c40f; }
.dot.king     { background: #e74c3c; }
.dot.unicorn  { background: #1abc9c; }
.dot.pawn     { background: #95a5a6; }


/* Player color indicator (network mode) */
#player-color-indicator {
  font-size: 14px;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.55);
  padding: 6px 12px;
  border-radius: 6px;
  border-left: 3px solid #a8d8ea;
}

#player-color-indicator.black-turn {
  border-left-color: #888;
  color: #bbb;
}

#player-color-indicator.hidden {
  display: none;
}

/* ── Lobby overlay ──────────────────────────────────────────────────────── */

#lobby-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

#lobby-overlay.hidden {
  display: none;
}

#lobby-box {
  background: #16213e;
  border: 1px solid #2d6a9f;
  border-radius: 14px;
  padding: 44px 56px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  min-width: 320px;
}

/* Each panel is its own flex column so children are evenly spaced */
#lobby-mode,
#lobby-host,
#lobby-join,
#lobby-ai {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.lobby-title {
  font-size: 28px;
  font-weight: 700;
  color: #a8d8ea;
}

.lobby-subtitle {
  font-size: 13px;
  color: #6699bb;
  letter-spacing: 1px;
  margin-top: -6px;
}

.lobby-label {
  font-size: 14px;
  color: #aaa;
}

#lobby-loading {
  font-size: 13px;
  color: #556677;
  margin-top: 4px;
}

#lobby-box button {
  pointer-events: all;
  background: #2d6a9f;
  color: #fff;
  border: none;
  padding: 11px 0;
  border-radius: 7px;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s;
  width: 200px;
}

#lobby-box button:hover:not(:disabled) {
  background: #3a85c4;
}

#lobby-box button:disabled {
  background: #1e3a55;
  color: #445566;
  cursor: not-allowed;
}

.btn-back {
  background: transparent !important;
  color: #6699bb !important;
  font-size: 13px !important;
  padding: 6px 0 !important;
  width: auto !important;
  text-decoration: underline;
  align-self: flex-start;
}

.btn-back:hover:not(:disabled) {
  background: transparent !important;
  color: #a8d8ea !important;
}

#room-code-display {
  font-family: 'Courier New', monospace;
  font-size: 38px;
  letter-spacing: 10px;
  color: #f1c40f;
  background: rgba(0, 0, 0, 0.35);
  padding: 12px 20px;
  border-radius: 8px;
  user-select: all;
}

#room-code-input {
  font-family: 'Courier New', monospace;
  font-size: 30px;
  letter-spacing: 8px;
  text-align: center;
  text-transform: uppercase;
  background: rgba(0, 0, 0, 0.35);
  color: #f1c40f;
  border: 1px solid #2d6a9f;
  border-radius: 7px;
  padding: 8px 14px;
  width: 200px;
  outline: none;
}

#room-code-input:focus {
  border-color: #a8d8ea;
}

#join-error {
  font-size: 13px;
  color: #ff6b6b;
}

#join-error.hidden {
  display: none;
}

#lobby-host.hidden,
#lobby-join.hidden,
#lobby-mode.hidden,
#lobby-ai.hidden {
  display: none;
}

/* ── Pawn promotion overlay ─────────────────────────────────────────────── */

#promotion-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 110;
  display: flex;
  align-items: center;
  justify-content: center;
}

#promotion-overlay.hidden {
  display: none;
}

#promotion-box {
  background: #16213e;
  border: 1px solid #2d6a9f;
  border-radius: 12px;
  padding: 32px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  min-width: 200px;
}

#promotion-box .lobby-title { font-size: 56px; }
#promotion-box .lobby-label { font-size: 28px; }
#promotion-box button        { font-size: 30px; width: auto; padding: 10px 32px; }

/* Game over overlay */
#game-over-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

#game-over-overlay.hidden {
  display: none;
}

#game-over-box {
  background: #16213e;
  border: 1px solid #2d6a9f;
  border-radius: 12px;
  padding: 40px 56px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

#game-over-title {
  font-size: 28px;
  font-weight: 700;
  color: #a8d8ea;
}

#game-over-result {
  font-size: 18px;
  color: #e0e0e0;
}

#review-board-btn {
  background: transparent;
  border: 1px solid #4a6fa5;
  color: #a8c0d8;
  font-size: 13px;
  padding: 6px 18px;
  margin-top: -6px;
}

#review-board-btn:hover {
  background: rgba(74, 111, 165, 0.2);
  color: #e0e0e0;
}

/* ── Hint button ────────────────────────────────────────────────────────── */

#hint-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.55);
  font-size: 22px;
  cursor: pointer;
  pointer-events: all;
  transition: background 0.2s, transform 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

#hint-btn:hover:not(:disabled) {
  background: rgba(0, 204, 255, 0.30);
  transform: scale(1.1);
}

#hint-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

#hint-btn.thinking {
  animation: hint-pulse 0.7s ease-in-out infinite alternate;
}

@keyframes hint-pulse {
  from { background: rgba(0, 0, 0, 0.55); }
  to   { background: rgba(0, 204, 255, 0.35); }
}

/* ── Undo request overlay ───────────────────────────────────────────────── */

#undo-request-overlay {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 120;
  display: flex;
  justify-content: center;
}

#undo-request-overlay.hidden {
  display: none;
}

#undo-request-box {
  background: #16213e;
  border: 1px solid #2d6a9f;
  border-radius: 10px;
  padding: 16px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.6);
  font-size: 14px;
  color: #e0e0e0;
  white-space: nowrap;
}

#undo-request-buttons {
  display: flex;
  gap: 10px;
}

#undo-request-buttons.hidden {
  display: none;
}

#undo-accept-btn {
  background: #27ae60;
  color: #fff;
  border: none;
  padding: 7px 20px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.2s;
}

#undo-accept-btn:hover { background: #2ecc71; }

#undo-decline-btn {
  background: #c0392b;
  color: #fff;
  border: none;
  padding: 7px 20px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.2s;
}

#undo-decline-btn:hover { background: #e74c3c; }

/* ── Captured pieces bar ────────────────────────────────────────────────── */

#captures-bar {
  position: fixed;
  bottom: 16px;
  left: 16px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 4px;
  pointer-events: none;
}

.captures-row {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(0, 0, 0, 0.50);
  padding: 3px 8px;
  border-radius: 5px;
}

.captures-row.hidden {
  display: none;
}

.captures-label {
  font-size: 13px;
  opacity: 0.55;
  line-height: 1;
  flex-shrink: 0;
}

.captures-pieces {
  font-size: 15px;
  letter-spacing: 1px;
  line-height: 1;
}