/* ===== Custom 2048 — Full Russian + Dark Theme + Music ===== */

:root {
  --font-main: 'Plus Jakarta Sans', 'Clear Sans', 'Helvetica Neue', Arial, sans-serif;
  --color-bg: #faf8ef;
  --color-surface: #fff;
  --color-brown: #8f7a66;
  --color-brown-light: #bbada0;
  --color-text: #776e65;
  --color-text-secondary: #999;
  --color-accent: #f2b179;
  --color-gold: #edc22e;
  --color-border: #eee4da;
  --color-card-bg: #eee4da40;
  --color-input-bg: #fff;
  --color-modal-bg: #fff;
  --color-hover-light: #eee4da;
  --color-btn-secondary-bg: #e8e4df;
  --color-btn-secondary-hover: #d6d1cb;
  --color-overlay: rgba(0,0,0,0.5);
  --radius: 8px;
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Dark Theme ===== */
[data-theme="dark"] {
  --color-bg: #1a1a2e;
  --color-surface: #16213e;
  --color-brown: #a8967e;
  --color-brown-light: #4a4458;
  --color-text: #e0d6cc;
  --color-text-secondary: #8a8494;
  --color-accent: #e8a55a;
  --color-gold: #f0c850;
  --color-border: #2a2a4a;
  --color-card-bg: rgba(42,42,74,0.4);
  --color-input-bg: #1a1a2e;
  --color-modal-bg: #16213e;
  --color-hover-light: #2a2a4a;
  --color-btn-secondary-bg: #2a2a4a;
  --color-btn-secondary-hover: #3a3a5a;
  --color-overlay: rgba(0,0,0,0.7);
}

[data-theme="dark"],
[data-theme="dark"] body {
  background: var(--color-bg) !important;
  color: var(--color-text);
}

[data-theme="dark"] .container {
  color: var(--color-text);
}

[data-theme="dark"] .game-container {
  background: var(--color-brown-light) !important;
}

[data-theme="dark"] .grid-cell {
  background: rgba(255,255,255,0.06) !important;
}

[data-theme="dark"] .tile .tile-inner {
  /* Darken tile backgrounds slightly */
  filter: brightness(0.85) saturate(1.1);
}

[data-theme="dark"] h1.title {
  color: var(--color-text) !important;
}

[data-theme="dark"] .score-container,
[data-theme="dark"] .best-container {
  background: var(--color-brown-light) !important;
  color: #e0d6cc !important;
}

[data-theme="dark"] .score-container:after,
[data-theme="dark"] .best-container:after {
  color: #8a8494 !important;
}

[data-theme="dark"] .restart-button {
  background: var(--color-brown) !important;
  color: #fff !important;
}

[data-theme="dark"] .game-intro,
[data-theme="dark"] .game-explanation {
  color: var(--color-text-secondary) !important;
}

[data-theme="dark"] .game-explanation strong {
  color: var(--color-text) !important;
}

/* ===== Localized Score Labels ===== */
[data-lang="ru"] .score-container:after {
  content: "СЧЕТ" !important;
}

[data-lang="ru"] .best-container:after {
  content: "ЛУЧШ" !important;
}

[data-lang="en"] .score-container:after {
  content: "SCORE" !important;
}

[data-lang="en"] .best-container:after {
  content: "BEST" !important;
}

/* ===== Base ===== */
body {
  font-family: var(--font-main);
  transition: background 0.3s ease, color 0.3s ease;
}

h1.title {
  font-family: var(--font-main);
  font-weight: 800;
  letter-spacing: -2px;
}

/* ===== Above-game buttons ===== */
.above-game-buttons {
  display: flex;
  gap: 8px;
  float: right;
}

.customize-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  border-radius: 3px;
  padding: 0 16px;
  text-decoration: none;
  color: #fff;
  height: 40px;
  line-height: 42px;
  text-align: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  transition: background var(--transition);
}

.customize-button-icon {
  margin-right: 6px;
}

.download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brown);
  border-radius: 3px;
  padding: 0 16px;
  text-decoration: none;
  color: #fff;
  height: 40px;
  line-height: 42px;
  text-align: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  transition: background var(--transition);
}

.customize-button:hover {
  background: #e5a468;
  color: #fff;
  text-decoration: none;
}

.download-button:hover {
  background: #7d6b59;
  color: #fff;
  text-decoration: none;
}

.restart-button {
  float: none !important;
}

/* ===== Toolbar (Size + Theme + Music) ===== */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 12px;
  margin-bottom: 10px;
  position: relative;
  z-index: 5;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 2px solid var(--color-brown-light);
  border-radius: 10px;
  background: transparent;
}

.lang-btn {
  min-width: 40px;
  height: 30px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--color-text);
  font-family: var(--font-main);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.4px;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn:hover {
  background: var(--color-hover-light);
}

.lang-btn.active {
  background: var(--color-brown);
  color: #fff;
}

.size-label {
  font-weight: 700;
  font-size: 14px;
  color: var(--color-text);
  margin-right: 4px;
}

.size-btn {
  border: 2px solid var(--color-brown-light);
  background: transparent;
  color: var(--color-text);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
}

.size-btn:hover {
  background: var(--color-hover-light);
  border-color: var(--color-brown);
}

.size-btn.active {
  background: var(--color-brown);
  color: #fff;
  border-color: var(--color-brown);
}

.size-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* Icon Buttons (theme, music) */
.icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 2px solid var(--color-brown-light);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.icon-btn:hover {
  background: var(--color-hover-light);
  border-color: var(--color-brown);
}
.icon-btn.active {
  background: var(--color-brown);
  color: #fff;
  border-color: var(--color-brown);
}

/* Theme toggle icons */
.icon-sun { display: block; }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* Music toggle icons */
.icon-music-on { display: none; }
.icon-music-off { display: block; }
.icon-btn.active .icon-music-on { display: block; }
.icon-btn.active .icon-music-off { display: none; }

/* ===== Music Panel ===== */
.music-panel {
  display: none;
  margin-top: 30px;
  margin-bottom: -20px;
  padding: 12px 14px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  position: relative;
  z-index: 4;
}
.music-panel.visible {
  display: block;
}

.music-input-row {
  display: flex;
  gap: 6px;
}

.music-file-btn {
  font-size: 16px;
  padding: 0 8px;
  line-height: 34px;
  height: 34px;
  cursor: pointer;
  flex-shrink: 0;
}

.music-url-input {
  flex: 1;
  height: 34px;
  border: 2px solid var(--color-brown-light);
  border-radius: 6px;
  padding: 0 12px;
  font-size: 13px;
  font-family: var(--font-main);
  outline: none;
  background: var(--color-input-bg);
  color: var(--color-text);
  transition: border-color var(--transition);
}
.music-url-input:focus {
  border-color: var(--color-brown);
}
.music-url-input::placeholder {
  color: var(--color-text-secondary);
}

.music-player-wrap {
  margin-top: 8px;
  border-radius: 8px;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease;
}
.music-player-wrap.has-player {
  max-height: 400px;
}
.music-player-wrap iframe {
  width: 100%;
  border: none;
  border-radius: 8px;
}
.music-player-wrap audio {
  width: 100%;
  border-radius: 8px;
  margin-top: 4px;
}

.music-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.music-now-playing {
  font-size: 12px;
  color: var(--color-text-secondary);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Volume Control */
.volume-control {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.volume-icon {
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 80px;
  height: 4px;
  border-radius: 2px;
  background: var(--color-brown-light);
  outline: none;
  cursor: pointer;
  transition: opacity 0.15s;
}
.volume-slider:hover {
  opacity: 0.9;
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-brown);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-brown);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

[data-theme="dark"] .volume-slider::-webkit-slider-thumb {
  border-color: var(--color-bg);
}
[data-theme="dark"] .volume-slider::-moz-range-thumb {
  border-color: var(--color-bg);
}

.volume-value {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-secondary);
  min-width: 28px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ===== Music Service Link Box ===== */
.music-link-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  margin-top: 8px;
}

.music-link-text {
  flex: 1;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.4;
}

/* ===== Records Panel ===== */
.records-panel {
  margin-top: 20px;
  padding: 16px;
  background: var(--color-card-bg);
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.records-title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 800;
  color: var(--color-text);
  font-family: var(--font-main);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.record-card {
  background: var(--color-brown-light);
  border-radius: 6px;
  padding: 10px 8px;
  text-align: center;
  transition: all var(--transition);
}

.record-card.record-active {
  background: var(--color-brown);
  transform: scale(1.05);
}

.record-size {
  font-size: 12px;
  font-weight: 700;
  color: #eee4da;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.record-score {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  font-variant-numeric: tabular-nums;
}

/* ===== Win Message ===== */
.win-sub {
  display: block;
  font-size: 18px;
  font-weight: 600;
  margin-top: 8px;
  line-height: 1.4;
  color: #f9f6f2;
}

.game-container .game-message.game-won p {
  font-size: 36px;
  margin-top: 170px;
  height: auto;
  line-height: 1.3;
}

.game-container .game-message .keep-playing-button {
  background: #4CAF50;
  color: #fff;
}
.game-container .game-message .keep-playing-button:hover {
  background: #45a049;
}

/* ===== Tile Images ===== */
.tile-inner.has-image {
  position: relative;
  overflow: hidden;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 3px;
  position: absolute;
  top: 0;
  left: 0;
}

.tile-label {
  position: absolute;
  bottom: 2px;
  right: 4px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.7), 0 0 6px rgba(0,0,0,0.3);
  z-index: 2;
  line-height: 1;
}

/* ===== Modal Overlay ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--color-modal-bg);
  border-radius: 16px;
  width: 100%;
  max-width: 520px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 80px rgba(0,0,0,0.2);
  animation: modal-in 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 12px;
  border-bottom: 1px solid var(--color-border);
}
.modal-header h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text);
  font-family: var(--font-main);
}
.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  color: var(--color-text-secondary);
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background var(--transition);
}
.modal-close:hover {
  background: var(--color-hover-light);
  color: var(--color-text);
}

.modal-body {
  padding: 16px 24px;
  overflow-y: auto;
  flex: 1;
}
.modal-hint {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin: 0 0 16px;
  line-height: 1.5;
}

.modal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px 20px;
  border-top: 1px solid var(--color-border);
}
.modal-footer-left {
  display: flex;
  gap: 8px;
}

/* ===== Tile Config Grid ===== */
.tile-config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.tile-config-card {
  background: var(--color-card-bg);
  border-radius: 12px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 2px solid transparent;
  transition: border-color var(--transition);
}
.tile-config-card:hover {
  border-color: var(--color-brown-light);
}

.tile-preview {
  width: 64px;
  height: 64px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  overflow: hidden;
  position: relative;
}
.preview-number {
  font-size: 22px;
  font-weight: 800;
  font-family: var(--font-main);
}
.preview-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tile-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.tile-value-label {
  font-size: 16px;
  font-weight: 800;
  color: var(--color-text);
  min-width: 42px;
}

.btn-group {
  display: flex;
  gap: 4px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: none;
  border-radius: 6px;
  font-family: var(--font-main);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-sm {
  height: 30px;
  padding: 0 10px;
  font-size: 12px;
}

.btn-upload {
  background: var(--color-brown);
  color: #fff;
  cursor: pointer;
}
.btn-upload:hover {
  background: #7a6758;
}

.btn-url {
  background: var(--color-btn-secondary-bg);
  color: var(--color-text);
}
.btn-url:hover {
  background: var(--color-btn-secondary-hover);
}

.btn-remove {
  background: #f5d5d5;
  color: #c44;
  width: 30px;
  padding: 0;
}
.btn-remove:hover {
  background: #e8b8b8;
}

[data-theme="dark"] .btn-remove {
  background: #3a2020;
  color: #f55;
}
[data-theme="dark"] .btn-remove:hover {
  background: #4a2a2a;
}

.btn-primary {
  height: 40px;
  padding: 0 24px;
  font-size: 15px;
  background: var(--color-brown);
  color: #fff;
}
.btn-primary:hover {
  background: #7a6758;
}
.btn-primary.btn-sm {
  height: 34px;
  padding: 0 14px;
  font-size: 13px;
}

.btn-secondary {
  height: 40px;
  padding: 0 24px;
  font-size: 15px;
  background: var(--color-btn-secondary-bg);
  color: var(--color-text);
}
.btn-secondary:hover {
  background: var(--color-btn-secondary-hover);
}

/* ===== URL Input Row ===== */
.url-input-row {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.url-text-input {
  flex: 1;
  height: 30px;
  border: 2px solid var(--color-brown-light);
  border-radius: 6px;
  padding: 0 10px;
  font-size: 12px;
  font-family: var(--font-main);
  outline: none;
  background: var(--color-input-bg);
  color: var(--color-text);
  transition: border-color var(--transition);
}
.url-text-input:focus {
  border-color: var(--color-brown);
}

/* ===== Game Layout ===== */
.play-layout {
  margin-top: 8px;
}

.side-panel {
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
}

.side-title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 800;
  color: var(--color-text);
  font-family: var(--font-main);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.side-panel .game-explanation {
  margin: 0 0 12px;
  line-height: 1.55;
}

.side-panel .game-explanation:last-child {
  margin-bottom: 0;
}

.online-card {
  margin-bottom: 16px;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background:
    linear-gradient(145deg, rgba(242, 177, 121, 0.18), rgba(255, 255, 255, 0.2)),
    var(--color-card-bg);
}

.online-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.online-card-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.online-title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.online-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.online-badge-offline {
  background: rgba(143, 122, 102, 0.12);
  color: var(--color-text-secondary);
}

.online-badge-waiting {
  background: rgba(242, 177, 121, 0.18);
  color: #b76c2f;
}

.online-badge-live {
  background: rgba(76, 175, 80, 0.18);
  color: #2f8a42;
}

.online-setup {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.online-server-toggle {
  padding: 0 12px;
  white-space: nowrap;
}

.online-server-toggle.active {
  background: var(--color-brown);
  color: #fff;
  border-color: var(--color-brown);
}

.online-create-btn {
  display: flex;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.online-server-input,
.online-name-input,
.online-room-input,
.online-join-row .btn,
.online-session-actions .btn {
  box-sizing: border-box;
}

.online-server-input,
.online-name-input {
  width: 100%;
  max-width: 100%;
}

.online-server-input,
.online-name-input {
  display: block;
  height: 40px;
  border: 2px solid var(--color-brown-light);
  border-radius: 8px;
  padding: 0 12px;
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-input-bg);
  outline: none;
}

.online-server-row[hidden] {
  display: none;
}

.online-server-input {
  text-transform: none;
  letter-spacing: 0;
}

.online-server-input:focus,
.online-name-input:focus,
.online-room-input:focus {
  border-color: var(--color-brown);
}

.online-join-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
}

.online-room-input {
  flex: 1 1 auto;
  width: auto;
  min-width: 0;
  height: 40px;
  border: 2px solid var(--color-brown-light);
  border-radius: 8px;
  padding: 0 12px;
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text);
  background: var(--color-input-bg);
  outline: none;
}

.online-join-row .btn {
  flex: 0 0 auto;
  white-space: nowrap;
}

.online-session[hidden] {
  display: none;
}

.online-room-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.online-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.online-room-code {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 1px;
}

.online-status-text {
  margin: 12px 0 14px;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.45;
}

.online-scoreboard {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.online-player-card {
  padding: 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.38);
  border: 1px solid rgba(143, 122, 102, 0.12);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.online-player-role {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--color-text-secondary);
}

.online-player-score {
  font-size: 28px;
  line-height: 1;
  font-weight: 800;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.online-player-name {
  font-size: 16px;
  line-height: 1.15;
  font-weight: 800;
  color: var(--color-text);
}

.online-player-meta {
  font-size: 11px;
  line-height: 1.45;
  color: var(--color-text-secondary);
}

.online-preview-wrap {
  margin-top: 8px;
}

.online-preview {
  --preview-size: 4;
  display: grid;
  grid-template-columns: repeat(var(--preview-size), minmax(0, 1fr));
  gap: 4px;
  padding: 8px;
  border-radius: 10px;
  background: rgba(187, 173, 160, 0.18);
  min-height: 96px;
}

.online-preview-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  border-radius: 8px;
  color: var(--color-text-secondary);
  font-size: 11px;
  text-align: center;
}

.online-preview-cell {
  aspect-ratio: 1;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 800;
  line-height: 1;
  color: #776e65;
  background: rgba(238, 228, 218, 0.6);
}

.online-preview-cell-empty {
  background: rgba(255, 255, 255, 0.16);
}

.online-session-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.online-session-actions .btn {
  flex: 1;
}

.online-error {
  margin: 12px 0 0;
  color: #c4554d;
  font-size: 12px;
  line-height: 1.4;
}

[data-theme="dark"] .online-badge-offline {
  background: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .online-badge-waiting {
  color: #f0c850;
}

[data-theme="dark"] .online-badge-live {
  color: #7bd389;
}

[data-theme="dark"] .online-player-card {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .online-preview {
  background: rgba(255, 255, 255, 0.04);
}

[data-theme="dark"] .online-preview-cell {
  color: #f1e7db;
}

[data-theme="dark"] .online-preview-cell-empty {
  background: rgba(255, 255, 255, 0.08);
}

@media screen and (min-width: 960px) {
  html, body {
    height: 100%;
    overflow: hidden;
  }

  body {
    margin: 0 !important;
    padding: 12px 16px;
    box-sizing: border-box;
  }

  .container {
    width: min(1120px, 100%) !important;
    height: calc(100vh - 24px);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
  }

  .play-layout {
    display: flex;
    gap: 18px;
    align-items: flex-start;
    margin-top: 10px;
    flex: 1;
    min-height: 0;
  }

  .play-main {
    width: 500px;
    flex: 0 0 auto;
  }

  .game-container {
    margin-top: 12px;
  }

  .records-panel {
    margin-top: 12px;
  }

  .side-panel {
    margin-top: 0;
    min-width: 250px;
    max-width: 320px;
    max-height: 100%;
    overflow: auto;
  }
}

/* ===== Mobile ===== */
@media screen and (max-width: 520px) {
  .above-game-buttons {
    float: none;
    display: flex;
    margin-top: 8px;
  }
  .restart-button, .customize-button, .download-button {
    flex: 1;
    display: block !important;
    text-align: center;
  }
  .game-intro {
    float: none !important;
    width: 100% !important;
  }
  .modal {
    max-height: 90vh;
    border-radius: 12px;
  }
  .tile-config-grid {
    grid-template-columns: 1fr;
  }
  .tile-label {
    font-size: 10px;
  }
  .tile-inner.has-image .tile-image {
    border-radius: 3px;
  }
  .online-scoreboard {
    grid-template-columns: 1fr;
  }
  .online-session-actions {
    flex-direction: column;
  }
  .toolbar {
    margin-top: 8px;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .toolbar-left {
    flex-wrap: wrap;
  }
  .toolbar-right {
    width: 100%;
    justify-content: space-between;
  }
  .lang-switch {
    order: 1;
  }
  .size-btn {
    padding: 5px 10px;
    font-size: 12px;
  }
  .records-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
  }
  .record-score {
    font-size: 16px;
  }
  .record-size {
    font-size: 11px;
  }
  .game-container .game-message.game-won p {
    font-size: 24px;
    margin-top: 70px;
  }
  .win-sub {
    font-size: 13px;
  }
  .music-panel {
    margin-top: 18px;
    margin-bottom: -8px;
  }
  .music-url-input {
    font-size: 12px;
  }
}