:root {
  --bg-body: #0f172a;
  --bg-panel: rgba(30, 41, 59, 0.55);
  --bg-input: rgba(15, 23, 42, 0.6);
  --border-subtle: rgba(255, 255, 255, 0.12);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3), inset 0 1px 1px rgba(255, 255, 255, 0.08);
  
  --border-focus: #10b981;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  
  --primary: #10b981;
  --primary-hover: #059669;
  
  --secondary: rgba(255, 255, 255, 0.1);
  --secondary-hover: rgba(255, 255, 255, 0.2);
  
  --board-light: #ebecd0;
  --board-dark: #739552;
  
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
}

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

body {
  background-color: var(--bg-body);
  /* Замените на свою картинку-фон */
  background-image: url('https://images.unsplash.com/photo-1529699211952-734e80c4d42b?q=80&w=2000&auto=format&fit=crop');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-main);
  font-family: 'Inter', sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding: 20px;
  min-height: 100vh;
}

.hidden { display: none !important; }

.page-shell {
  max-width: 1280px;
  margin: 0 auto;
}

.main-header {
  margin-bottom: 24px;
  text-align: left;
}

.main-header h1 {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 12px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.chess-icon {
  color: var(--primary);
  font-size: 32px;
}

.app-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 24px;
  align-items: start;
}

.panel {
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--glass-shadow);
}

.panel-head { margin-bottom: 20px; }

.label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 4px;
}

h3 { font-size: 18px; font-weight: 600; color: #fff; }
h2 { font-size: 20px; font-weight: 700; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  backdrop-filter: blur(4px);
}

.primary-button {
  background-color: var(--primary);
  color: #fff;
  width: 100%;
  padding: 12px;
  font-size: 15px;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}
.primary-button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

.secondary-button {
  background-color: var(--secondary);
  border: 1px solid var(--border-subtle);
  color: #fff;
}
.secondary-button:hover { background-color: var(--secondary-hover); }

.ghost-button {
  background: transparent;
  color: #ff5c5c;
  border: 1px solid rgba(255, 92, 92, 0.5);
  width: 100%;
}
.ghost-button:hover { background: rgba(255, 92, 92, 0.15); color: #ff7676; }

.icon-button {
  background-color: var(--secondary);
  border: 1px solid var(--border-subtle);
  color: #fff;
  padding: 10px;
}
.icon-button:hover { background-color: var(--secondary-hover); }

.mode-switcher {
  display: flex;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 20px;
  border: 1px solid var(--border-subtle);
}

.mode-button {
  flex: 1;
  background: transparent;
  color: var(--text-muted);
  padding: 8px;
  border: none;
}
.mode-button.active {
  background: var(--secondary-hover);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}
.field span { font-size: 13px; font-weight: 500; color: var(--text-muted); }

.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

input[type="text"], select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: #fff;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: all 0.2s;
}
input[type="text"]:focus, select:focus {
  border-color: var(--border-focus);
  background: rgba(15, 23, 42, 0.8);
}
input::placeholder { color: rgba(255,255,255,0.3); }

.join-row { display: flex; gap: 8px; }
.join-row input { flex: 1; }

.muted-copy {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
  text-align: center;
}

.board-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}
.toolbar-actions { display: flex; gap: 8px; }

.board-stage {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(8px);
  padding: 12px;
  border-radius: var(--radius-md);
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.5);
  border: 1px solid var(--border-subtle);
}

.board {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  border: 4px solid rgba(15, 23, 42, 0.8);
  border-radius: var(--radius-sm); 
  overflow: hidden;
}

.board > div:nth-child(even) { background-color: var(--board-dark); }
.board > div:nth-child(odd) { background-color: var(--board-light); }
.board > div:nth-child(16n+9), .board > div:nth-child(16n+11), .board > div:nth-child(16n+13), .board > div:nth-child(16n+15),
.board > div:nth-child(16n+2), .board > div:nth-child(16n+4), .board > div:nth-child(16n+6), .board > div:nth-child(16n+8) {
  background-color: var(--board-dark);
}
.board > div:nth-child(16n+1), .board > div:nth-child(16n+3), .board > div:nth-child(16n+5), .board > div:nth-child(16n+7),
.board > div:nth-child(16n+10), .board > div:nth-child(16n+12), .board > div:nth-child(16n+14), .board > div:nth-child(16n+16) {
  background-color: var(--board-light);
}

.status-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
  padding: 16px;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}
.status-message { font-weight: 500; font-size: 15px; }

.status-meta { display: flex; gap: 8px; }
.status-chip {
  padding: 4px 10px;
  border-radius: 20px; 
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.turn-white { background: rgba(255, 255, 255, 0.9); color: #000; }
.turn-black { background: rgba(0, 0, 0, 0.8); color: #fff; border: 1px solid var(--border-subtle); }
.connection-solo { background: var(--secondary); color: #fff; }
.connection-party { background: var(--primary); color: #fff; }

.roster-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.roster-card {
  background: rgba(0, 0, 0, 0.2);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border-subtle);
}
.roster-card.white-player { border-left: 4px solid rgba(255,255,255,0.8); }
.roster-card.black-player { border-left: 4px solid rgba(0,0,0,0.8); }

.roster-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.roster-role {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
}
.roster-card strong { font-size: 14px; }

/* ЧАСЫ */
.player-clock {
  font-family: monospace, sans-serif;
  font-size: 20px;
  font-weight: 700;
  background: rgba(0, 0, 0, 0.4);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  letter-spacing: 1px;
  transition: all 0.3s ease;
  min-width: 80px;
  text-align: center;
}

.player-clock.active {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}

.player-clock.danger {
  background: rgba(239, 68, 68, 0.2);
  border-color: #ef4444;
  color: #ef4444;
  animation: pulse-danger 1s infinite;
}

@keyframes pulse-danger {
  0% { box-shadow: 0 0 0 rgba(239, 68, 68, 0.4); }
  50% { box-shadow: 0 0 10px rgba(239, 68, 68, 0.8); }
  100% { box-shadow: 0 0 0 rgba(239, 68, 68, 0); }
}

/* ЗРИТЕЛИ */
.spectator-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.badge {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}
.spectator-list { list-style: none; font-size: 13px; color: var(--text-muted); }
.empty-state { font-style: italic; opacity: 0.7; }

.captured-grid { display: flex; flex-direction: column; gap: 16px; }
.captured-box {
  background: rgba(0, 0, 0, 0.2);
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}
.captured-label { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.captured-row { min-height: 24px; display: flex; gap: 4px; font-size: 20px; }

.move-history {
  list-style-position: inside;
  font-size: 14px;
  color: var(--text-muted);
  max-height: 200px;
  overflow-y: auto;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-subtle);
  padding: 12px;
  border-radius: var(--radius-sm);
}
.move-history li { padding: 4px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
.move-history li:last-child { border-bottom: none; color: #fff; font-weight: 500;}

/* ФУТЕР И GITHUB */
.footer {
  text-align: center;
  margin-top: 40px;
  padding: 20px 0;
  display: flex;
  justify-content: center;
  align-items: center;
}
.github-link {
  display: inline-block;
  opacity: 0.6;
  transition: all 0.3s ease;
}
.github-link:hover {
  opacity: 1;
  transform: translateY(-3px) scale(1.05);
  filter: drop-shadow(0 4px 8px rgba(255, 255, 255, 0.2));
}
.github-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
  filter: invert(1); /* Делает черную иконку белой. Уберите, если иконка цветная. */
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-card {
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--glass-shadow);
  text-align: center;
  min-width: 300px;
}
.promotion-options {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 24px;
}
.promotion-options button {
  font-size: 32px;
  padding: 16px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-subtle);
}
.promotion-options button:hover {
  background: var(--primary);
  border-color: var(--primary);
}

.toast-host {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (max-width: 960px) {
  .app-grid { grid-template-columns: 1fr; }
  .board-toolbar { flex-direction: column; gap: 16px; align-items: stretch; }
  .toolbar-actions { justify-content: stretch; }
  .toolbar-actions button { flex: 1; }
}