:root {
  --ink: #0d1b16;
  --jade: #1a3c32;
  --jade-bright: #2f6b55;
  --gold: #d4a857;
  --gold-soft: #f0d9a0;
  --lacquer: #b4332a;
  --lacquer-deep: #7a1c18;
  --card: rgba(18, 36, 30, 0.82);
  --card-edge: rgba(212, 168, 87, 0.35);
  --text: #f3e6c8;
  --muted: #a89878;
  --board: #c9a15b;
  --success: #5dba8a;
  --danger: #ff7b6e;
  --radius: 20px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Serif SC", "Songti SC", "STSong", "PingFang SC", serif;
  color: var(--text);
  background-color: var(--ink);
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(212, 168, 87, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 45% at 95% 5%, rgba(180, 51, 42, 0.18), transparent 50%),
    radial-gradient(ellipse 60% 40% at 50% 110%, rgba(47, 107, 85, 0.35), transparent 55%),
    repeating-linear-gradient(
      115deg,
      rgba(255, 255, 255, 0.015) 0 2px,
      transparent 2px 7px
    ),
    linear-gradient(165deg, #081410 0%, #142820 42%, #0c1814 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 30%, rgba(240, 217, 160, 0.06), transparent 25%),
    radial-gradient(circle at 80% 70%, rgba(180, 51, 42, 0.07), transparent 28%);
  animation: ambience 12s ease-in-out infinite alternate;
  z-index: 0;
}

@keyframes ambience {
  from { opacity: 0.55; transform: scale(1); }
  to { opacity: 1; transform: scale(1.04); }
}

.shell {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 22px 14px 40px;
}

.hero {
  text-align: center;
  margin-bottom: 22px;
}

.eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--gold-soft);
  background: linear-gradient(135deg, rgba(212, 168, 87, 0.18), rgba(180, 51, 42, 0.12));
  border: 1px solid rgba(212, 168, 87, 0.35);
  margin: 0 0 12px;
}

.hero h1 {
  margin: 0;
  font-family: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  font-size: clamp(2rem, 6vw, 2.8rem);
  font-weight: 400;
  letter-spacing: 0.12em;
  background: linear-gradient(180deg, #fff6de 0%, var(--gold) 45%, #a8792e 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 6px 18px rgba(212, 168, 87, 0.25));
}

.tagline {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.panel {
  background:
    linear-gradient(145deg, rgba(40, 70, 58, 0.55), rgba(12, 24, 20, 0.88)),
    var(--card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 22px 18px;
  box-shadow:
    0 24px 50px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(240, 217, 160, 0.18);
  border: 1px solid var(--card-edge);
  position: relative;
  overflow: hidden;
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 30h60M30 0v60' stroke='%23d4a857' stroke-opacity='0.05'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.8;
}

.panel > * { position: relative; z-index: 1; }
.panel.hidden { display: none; }

.field { display: grid; gap: 8px; margin-bottom: 14px; }
.field span { font-size: 0.9rem; color: var(--muted); }
.field input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid rgba(212, 168, 87, 0.28);
  border-radius: 12px;
  font-size: 1rem;
  background: rgba(8, 18, 14, 0.65);
  color: var(--text);
  outline: none;
  font-family: inherit;
}
.field input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(212, 168, 87, 0.2);
}

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.btn {
  appearance: none;
  border: none;
  border-radius: 12px;
  padding: 11px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.15s ease, filter 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  color: #2a1408;
  background: linear-gradient(135deg, #f0d9a0 0%, var(--gold) 45%, #b8863a 100%);
  box-shadow: 0 8px 22px rgba(212, 168, 87, 0.28);
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost {
  color: var(--gold-soft);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(212, 168, 87, 0.28);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.user-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(212, 168, 87, 0.15);
  font-size: 0.9rem;
}
.user-bar strong { color: var(--gold); }

.status-banner {
  text-align: center;
  padding: 12px 14px;
  border-radius: 12px;
  background: linear-gradient(90deg, rgba(212, 168, 87, 0.12), rgba(180, 51, 42, 0.1), rgba(212, 168, 87, 0.12));
  color: var(--gold-soft);
  font-size: 0.95rem;
  margin-bottom: 14px;
  border: 1px solid rgba(212, 168, 87, 0.2);
  letter-spacing: 0.04em;
}
.status-banner.is-playing {
  background: linear-gradient(90deg, rgba(93, 186, 138, 0.12), rgba(47, 107, 85, 0.2));
  color: #9be0bc;
  border-color: rgba(93, 186, 138, 0.3);
}
.status-banner.is-playing.is-urgent {
  background: linear-gradient(90deg, rgba(180, 51, 42, 0.25), rgba(212, 168, 87, 0.15));
  color: #ffb0a6;
  border-color: rgba(255, 123, 110, 0.45);
}
.turn-timer {
  text-align: center;
  margin: -6px 0 14px;
  font-family: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  letter-spacing: 0.06em;
  transition: color 0.15s, transform 0.15s;
}
.turn-timer.is-warn {
  color: #ff4d3d;
  font-size: clamp(1.8rem, 7vw, 2.6rem);
  font-weight: 700;
  text-shadow: 0 0 18px rgba(255, 60, 40, 0.45);
  animation: pulseUrgent 0.55s ease-in-out infinite alternate;
}
.turn-timer:not(.is-warn) {
  color: var(--gold-soft);
  font-size: 1.05rem;
}
@keyframes pulseUrgent {
  from { filter: brightness(1); transform: scale(1); }
  to { filter: brightness(1.12); transform: scale(1.03); }
}
.status-banner.is-ended {
  background: linear-gradient(90deg, rgba(180, 51, 42, 0.2), rgba(122, 28, 24, 0.25));
  color: #ffb0a6;
  border-color: rgba(255, 123, 110, 0.3);
}

.seats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 14px 0;
}
.seat {
  border-radius: 16px;
  padding: 18px 12px;
  text-align: center;
  border: 1px solid rgba(212, 168, 87, 0.22);
  background:
    radial-gradient(circle at 50% 0%, rgba(240, 217, 160, 0.12), transparent 55%),
    rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.seat:hover:not(.seat--disabled):not(.seat--taken) {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.3);
}
.seat--taken { cursor: default; }
.seat--mine {
  border-color: var(--gold);
  box-shadow: 0 0 0 2px rgba(212, 168, 87, 0.25), 0 12px 28px rgba(212, 168, 87, 0.12);
}
.seat--disabled { opacity: 0.5; cursor: not-allowed; }
.seat-stone {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  margin: 0 auto 10px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.15rem;
  position: relative;
}
.seat-stone--red {
  color: var(--lacquer);
  background:
    radial-gradient(circle at 32% 28%, #fff8f0 0%, #f0d0c0 35%, #e8b8a0 70%),
    #e8c4b0;
  border: 2px solid #c44536;
  box-shadow:
    0 8px 14px rgba(0, 0, 0, 0.35),
    inset 0 -4px 8px rgba(120, 40, 30, 0.2),
    inset 0 3px 6px rgba(255, 255, 255, 0.7);
}
.seat-stone--black {
  color: #f5efe6;
  background:
    radial-gradient(circle at 32% 28%, #666 0%, #2a2622 55%, #151210 100%);
  border: 2px solid #0a0908;
  box-shadow:
    0 8px 14px rgba(0, 0, 0, 0.45),
    inset 0 -4px 8px rgba(0, 0, 0, 0.5),
    inset 0 3px 6px rgba(255, 255, 255, 0.15);
}
.seat-label { font-weight: 600; margin-bottom: 4px; color: var(--gold-soft); }
.seat-player { font-size: 0.88rem; color: var(--muted); min-height: 1.2em; }

.spectators-card {
  margin: 4px 0 16px;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(212, 168, 87, 0.14);
}
.spectators-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}
.spectators-title { font-weight: 600; color: var(--gold-soft); }
.spectators-count { color: var(--muted); font-size: 0.85rem; }
.spectator-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.spectator-list li {
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(212, 168, 87, 0.1);
  border: 1px solid rgba(212, 168, 87, 0.22);
  font-size: 0.85rem;
}
.spectator-list li.is-me {
  border-color: var(--gold);
  color: var(--gold);
  font-weight: 600;
}
.spectator-empty {
  color: var(--muted);
  background: transparent !important;
  border: none !important;
}

.game-layout {
  display: grid;
  gap: 16px;
}
@media (min-width: 800px) {
  .game-layout {
    grid-template-columns: 1fr 240px;
    align-items: start;
  }
}

.board-wrap {
  width: min(100%, 600px);
  margin: 0 auto;
  position: relative;
  padding: 8px;
  border-radius: 16px;
  overflow: visible;
  background:
    linear-gradient(145deg, rgba(212, 168, 87, 0.25), rgba(26, 60, 50, 0.5));
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 240, 200, 0.25);
}
.board-wrap::before {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 12px;
  border: 1px solid rgba(240, 217, 160, 0.25);
  pointer-events: none;
  z-index: 1;
}
#boardCanvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  touch-action: none;
  background: #1a2e26;
  box-shadow: inset 0 0 40px rgba(80, 40, 10, 0.25);
}

.side-panel { display: grid; gap: 12px; }
.info-card, .aim-card {
  padding: 14px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(212, 168, 87, 0.16);
}
.info-card h3, .aim-card h3 {
  margin: 0 0 8px;
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.08em;
}
.player-line {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0;
}
.player-line.is-turn {
  font-weight: 700;
  color: var(--gold);
}
.dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}
.dot--red {
  background: radial-gradient(circle at 30% 30%, #ff8a7a, var(--lacquer));
}
.dot--black {
  background: radial-gradient(circle at 30% 30%, #666, #151210);
}

.aim-card.hidden { display: none; }
.aim-hint { margin: 0 0 10px; font-size: 0.85rem; color: var(--muted); }
.power-meter {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.88rem;
}
.power-bar {
  height: 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.35);
  overflow: hidden;
  border: 1px solid rgba(212, 168, 87, 0.2);
}
.power-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, #5dba8a, var(--gold), var(--lacquer));
  box-shadow: 0 0 12px rgba(212, 168, 87, 0.45);
}
.side-actions { flex-direction: column; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  padding: 12px 20px;
  border-radius: 999px;
  background: rgba(12, 24, 20, 0.92);
  color: var(--gold-soft);
  border: 1px solid rgba(212, 168, 87, 0.35);
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 100;
  max-width: calc(100% - 32px);
  text-align: center;
  backdrop-filter: blur(8px);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.offline-hint {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(180, 51, 42, 0.15);
  color: #ffb0a6;
  font-size: 0.85rem;
  border: 1px solid rgba(255, 123, 110, 0.25);
}
.back-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.88rem;
  text-decoration: none;
}
.back-link:hover { color: var(--gold); }
.hidden { display: none !important; }