/* ═══════════════════════════════════════════════════════════
   Chess Vision Coach — Stylesheet
   Palette:
     bg-deep    #0d0f12   near-black board felt
     bg-card    #161a20   card surfaces
     bg-card2   #1e242e   slightly lighter card
     accent     #7ec8a4   mint-green (chess coordinate labels)
     accent2    #f0c040   amber (chess piece gold)
     text-main  #e8eaf0
     text-dim   #7a8494
     danger     #e05c5c
   Type: Space Grotesk (UI) + Space Mono (moves/SAN)
   ─────────────────────────────────────────────── */

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

:root {
  --bg-deep:   #0d0f12;
  --bg-card:   #161a20;
  --bg-card2:  #1e242e;
  --accent:    #7ec8a4;
  --accent2:   #f0c040;
  --text:      #e8eaf0;
  --text-dim:  #7a8494;
  --danger:    #e05c5c;
  --radius:    12px;
  --gap:       14px;
}

html { font-size: 16px; }

body {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ── Header ─────────────────────────────────────── */
.header {
  background: var(--bg-card);
  border-bottom: 1px solid #ffffff0d;
  padding: 0 20px;
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}
.logo-icon {
  font-size: 1.5rem;
  line-height: 1;
}
.logo-text { color: var(--text); }

/* Status pill */
.status-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--bg-card2);
  border: 1px solid #ffffff10;
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #555;
  transition: background 0.3s;
}
.status-pill.online .status-dot  { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.status-pill.online .status-label { color: var(--accent); }
.status-pill.offline .status-dot  { background: var(--danger); }
.status-pill.offline .status-label { color: var(--danger); }

/* ── Main layout ────────────────────────────────── */
.main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: var(--gap);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap);
  align-items: start;
}

@media (max-width: 720px) {
  .main { grid-template-columns: 1fr; }
}

.col { display: flex; flex-direction: column; gap: var(--gap); }

/* ── Card ───────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid #ffffff0a;
  border-radius: var(--radius);
  padding: 16px;
}
.card-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Camera card ────────────────────────────────── */
.camera-wrapper {
  position: relative;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 4/3;
}
#cameraFeed {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.camera-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #000000cc;
  color: var(--text-dim);
  font-size: 0.9rem;
  transition: opacity 0.3s;
}
.camera-overlay.hidden { opacity: 0; pointer-events: none; }
.overlay-icon { font-size: 2.5rem; }

/* ── Board preview card ─────────────────────────── */
.board-wrapper {
  border-radius: 8px;
  overflow: hidden;
  background: #222;
}
.board-wrapper img {
  width: 100%;
  display: block;
}
.conf-badge {
  margin-left: auto;
  font-size: 0.7rem;
  background: var(--bg-card2);
  border-radius: 999px;
  padding: 2px 8px;
  color: var(--accent);
  font-family: 'Space Mono', monospace;
  font-weight: 700;
}

/* ── Config card ────────────────────────────────── */
.control-group { margin-bottom: 18px; }
.ctrl-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.elo-hint {
  font-family: 'Space Mono', monospace;
  font-size: 0.78rem;
  color: var(--accent2);
  font-weight: 700;
}

/* Toggle buttons */
.toggle-group {
  display: flex;
  gap: 6px;
}
.toggle-btn {
  flex: 1;
  background: var(--bg-card2);
  border: 1.5px solid #ffffff10;
  border-radius: 8px;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 8px 6px;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.toggle-btn:hover { border-color: #ffffff25; color: var(--text); }
.toggle-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #0d0f12;
  font-weight: 700;
}
.piece-icon { font-size: 1.1rem; }

/* Depth slider */
.depth-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-card2);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 0 3px #7ec8a420;
}
.depth-val {
  font-family: 'Space Mono', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent2);
  min-width: 24px;
  text-align: right;
}
.elo-note {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 6px;
}

/* Action buttons */
.btn-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}
.btn {
  flex: 1;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 11px 0;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: 0.02em;
}
.btn-start {
  background: var(--accent);
  color: #0d0f12;
}
.btn-start:hover { background: #94d6b4; }
.btn-stop {
  background: var(--bg-card2);
  color: var(--danger);
  border: 1.5px solid var(--danger);
}
.btn-stop:hover:not(:disabled) { background: var(--danger); color: #fff; }
.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ── Move card ──────────────────────────────────── */
.move-display {
  background: var(--bg-card2);
  border-radius: 10px;
  padding: 20px 16px;
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  border: 1.5px solid #ffffff08;
}
.move-waiting {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.88rem;
}
.wait-icon { font-size: 1.8rem; }

.move-result { text-align: center; }
.move-text {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.move-san {
  font-family: 'Space Mono', monospace;
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* ── Status bar ─────────────────────────────────── */
.status-bar {
  background: var(--bg-card2);
  border-radius: 7px;
  padding: 8px 12px;
  font-size: 0.78rem;
  color: var(--text-dim);
  min-height: 34px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.status-bar.error { color: var(--danger); }
.status-bar.ok    { color: var(--accent); }

/* ── Mode info card ─────────────────────────────── */
.info-card { padding: 12px 16px; }
.mode-info {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.82rem;
}
.mode-icon { font-size: 1.4rem; flex-shrink: 0; }
.mode-info strong { display: block; margin-bottom: 3px; color: var(--text); }
.mode-info p { color: var(--text-dim); line-height: 1.4; }

/* ── Footer ─────────────────────────────────────── */
.footer {
  text-align: center;
  font-size: 0.72rem;
  color: #ffffff25;
  padding: 16px;
  border-top: 1px solid #ffffff08;
}

/* ── Pulse animation for live indicator ─────────── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}
.pulsing { animation: pulse 1.6s ease-in-out infinite; }

/* ── Slide-in for new move ──────────────────────── */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.move-anim { animation: slideIn 0.3s ease-out; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .pulsing, .move-anim { animation: none; }
}