/* ---------- design tokens ---------- */
:root {
  --bg: #161512;
  --bg-elev: #1f1d18;
  --bg-elev-2: #2a271f;
  --fg: #ecebe3;
  --fg-dim: #b0aea2;
  --fg-faint: #7a7868;
  --accent: #d8a657;
  --accent-strong: #e7b96b;
  --danger: #c95a4b;
  --good: #87a96b;
  --line: #322f26;
  --shadow: 0 6px 20px rgba(0, 0, 0, 0.35);

  --radius: 6px;
  --board-max: 640px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', 'Segoe UI', -apple-system, system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-strong); }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--fg);
  font-size: 0.95rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease;
  font-family: inherit;
}
.btn:hover { background: var(--bg-elev-2); border-color: var(--fg-faint); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn--primary {
  background: var(--accent);
  color: #1c1a13;
  border-color: var(--accent);
  font-weight: 600;
}
.btn--primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn--danger { color: var(--danger); border-color: rgba(201, 90, 75, 0.4); }
.btn--danger:hover { background: rgba(201, 90, 75, 0.1); }
.btn--ghost { background: transparent; }

/* ---------- lobby ---------- */
body.lobby {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}
.lobby__card {
  width: 100%;
  max-width: 540px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--shadow);
}
.lobby__header { text-align: center; margin-bottom: 1.5rem; }
.lobby__header h1 {
  margin: 0;
  font-size: 2.5rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  font-weight: 600;
}
.lobby__tagline {
  color: var(--fg-dim);
  margin: 0.25rem 0 0;
  font-style: italic;
}
.lobby__panel {
  border-top: 1px solid var(--line);
  padding: 1.25rem 0;
}
.lobby__panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--accent-strong);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.lobby__hint {
  color: var(--fg-dim);
  font-size: 0.9rem;
  margin: 0 0 0.75rem;
}
.lobby__form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1rem;
  align-items: end;
}
.lobby__form button { grid-column: 1 / -1; }
.lobby__form--inline {
  grid-template-columns: 1fr auto;
  align-items: stretch;
}
.lobby__form--inline button { grid-column: auto; }
.lobby__footer {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--fg-faint);
  text-align: center;
}
.field { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.85rem; }
.field span { color: var(--fg-dim); }
.field select, .lobby__form--inline input, .panel__chatform input {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.55rem 0.7rem;
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
}
.field select:focus, .lobby__form--inline input:focus, .panel__chatform input:focus {
  border-color: var(--accent);
}

/* ---------- game page ---------- */
body.game {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.game__topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
}
.game__home { font-size: 0.9rem; color: var(--fg-dim); }
.game__home:hover { color: var(--accent); }
.game__title { font-weight: 600; letter-spacing: 0.05em; color: var(--accent); }
.game__share {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--fg-dim);
}
.game__share code {
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  color: var(--fg);
  font-family: 'JetBrains Mono', 'Menlo', monospace;
}

.game__layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  grid-template-rows: auto auto auto;
  gap: 0.75rem;
  padding: 1rem;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  align-items: start;
}
.game__side { grid-column: 1; }
.game__side--top { grid-row: 1; }
.game__side--bottom { grid-row: 3; }
.game__boardwrap {
  grid-column: 1;
  grid-row: 2;
  position: relative;
  width: 100%;
  max-width: var(--board-max);
  margin: 0 auto;
}
.game__board { width: 100%; }
.game__panel {
  grid-column: 2;
  grid-row: 1 / span 3;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.player {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.55rem 0.9rem;
  max-width: var(--board-max);
  margin: 0 auto;
}
.player__name { color: var(--fg); }
.player__clock {
  font-family: 'JetBrains Mono', 'Menlo', monospace;
  font-size: 1.4rem;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 0.2rem 0.7rem;
  border-radius: 4px;
}
.player.is-active .player__clock {
  background: var(--accent);
  color: #1c1a13;
  border-color: var(--accent);
}
.player.is-low .player__clock { color: var(--danger); }
.player.is-active.is-low .player__clock { background: var(--danger); color: #fff; border-color: var(--danger); }

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
}
.panel h3 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
  text-transform: uppercase;
  font-weight: 600;
}
.panel__status { margin: 0; color: var(--fg); }
.panel__moves {
  margin: 0;
  /* padding-left: 1.25rem; */
  max-height: 220px;
  overflow-y: auto;
  font-family: 'JetBrains Mono', 'Menlo', monospace;
  font-size: 0.9rem;
  color: var(--fg);
}
.panel__moves li { padding: 0.05rem 0; }
.panel__actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.panel__chat {
  height: 160px;
  overflow-y: auto;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.5rem 0.6rem;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.panel__chat .msg { color: var(--fg); }
.panel__chat .msg .who { color: var(--accent); margin-right: 0.4rem; font-weight: 600; }
.panel__chatform { display: flex; gap: 0.5rem; }
.panel__chatform input { flex: 1; min-width: 0; }

/* board overlay (game-over modal) */
.game__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(20, 19, 16, 0.78);
  z-index: 5;
  border-radius: var(--radius);
}
/* The browser's [hidden] rule sets display:none, but our display:flex above
   has higher specificity and would otherwise win — re-assert hidden here. */
.game__overlay[hidden] { display: none; }
.game__overlay-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.game__overlay-card p {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  color: var(--fg);
}

/* chessboard.js square highlights */
.highlight-last { box-shadow: inset 0 0 0 4px rgba(216, 166, 87, 0.6); }
.highlight-legal::before {
  content: '';
  display: block;
  position: absolute;
  width: 30%;
  height: 30%;
  top: 35%;
  left: 35%;
  background: rgba(216, 166, 87, 0.45);
  border-radius: 50%;
  pointer-events: none;
}
.highlight-legal-capture {
  box-shadow: inset 0 0 0 4px rgba(201, 90, 75, 0.55);
}

/* responsive */
@media (max-width: 900px) {
  .game__layout {
    grid-template-columns: 1fr;
  }
  .game__panel {
    grid-column: 1;
    grid-row: auto;
  }
}