/* =====================================================================
   HOLOGRAPHIC CHESS — Interface Stylesheet
   ===================================================================== */
:root {
  --cyan: #46f0ff;
  --cyan-soft: #b8fbff;
  --teal: #1be3c8;
  --blue: #3aa0ff;
  --violet: #9a6bff;
  --magenta: #ff4ddb;
  --warn: #ffcf5a;
  --enemy: #ff5a6e;
  --glass: rgba(8, 26, 46, 0.42);
  --glass-line: rgba(96, 224, 255, 0.32);
  --glow: 0 0 14px rgba(70, 240, 255, 0.55);
  --font-display: 'Orbitron', system-ui, sans-serif;
  --font-mono: 'Share Tech Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 35%, #07182b 0%, #030a14 55%, #01040a 100%);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  user-select: none;
  -webkit-user-select: none;
}

#scene { position: fixed; inset: 0; width: 100%; height: 100%; display: block; z-index: 1; cursor: grab; }
#scene:active { cursor: grabbing; }

/* ---------- Screen overlays ---------- */
#screen-fx { position: fixed; inset: 0; z-index: 5; pointer-events: none; }
.scanlines {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(to bottom,
    rgba(70,240,255,0.045) 0px, rgba(70,240,255,0.045) 1px,
    transparent 2px, transparent 3px);
  mix-blend-mode: screen; opacity: 0.5;
}
.vignette {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 45%, transparent 52%, rgba(0,0,0,0.62) 100%);
}

/* ---------- Panels ---------- */
.panel {
  position: fixed;
  z-index: 10;
  background: linear-gradient(160deg, var(--glass), rgba(4,16,28,0.5));
  border: 1px solid var(--glass-line);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  box-shadow: var(--glow), inset 0 0 22px rgba(70,240,255,0.08);
  border-radius: 12px;
}

#topbar {
  top: 14px; left: 14px; right: 14px;
  height: 58px;
  display: flex; align-items: center; gap: 22px;
  padding: 0 20px;
}
.title {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: 3px;
  font-size: 18px;
  color: #eafdff;
  text-shadow: var(--glow);
  display: flex; align-items: center; gap: 12px;
  white-space: nowrap;
}
.title .glyph { font-size: 24px; color: var(--cyan); }
.status {
  flex: 1;
  font-size: 13px;
  letter-spacing: 1.5px;
  color: var(--cyan);
  opacity: 0.85;
  text-align: center;
}
.author {
  font-size: 11px; letter-spacing: 2px;
  color: var(--teal); opacity: 0.8; white-space: nowrap;
}

#sidebar {
  top: 86px; right: 14px; bottom: 14px;
  width: 268px;
  padding: 16px;
  display: flex; flex-direction: column; gap: 14px;
  overflow-y: auto;
}
.block-h {
  font-family: var(--font-display);
  font-size: 11px; letter-spacing: 2.5px;
  color: var(--teal);
  margin-bottom: 7px;
  border-bottom: 1px solid rgba(70,240,255,0.18);
  padding-bottom: 5px;
}
.turn-indicator {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px; letter-spacing: 4px;
  text-align: center;
  padding: 10px;
  border: 1px solid var(--glass-line);
  border-radius: 8px;
  color: #eafdff;
  text-shadow: var(--glow);
  background: rgba(70,240,255,0.06);
}
.turn-indicator.black { color: #ffd6f4; text-shadow: 0 0 14px rgba(255,77,219,0.6); }
.captured {
  min-height: 30px;
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: 1px;
  word-break: break-all;
  color: var(--cyan-soft);
}
.log {
  flex: 1;
  min-height: 60px;
  font-size: 12px;
  line-height: 1.55;
  overflow-y: auto;
  color: var(--cyan-soft);
  opacity: 0.92;
}
.log .mv { display: flex; gap: 8px; }
.log .num { color: var(--teal); opacity: 0.7; min-width: 26px; }

.controls { display: flex; flex-direction: column; gap: 10px; margin-top: auto; }
button {
  font-family: var(--font-display);
  font-size: 13px; letter-spacing: 2px;
  color: #02101c;
  background: linear-gradient(180deg, var(--cyan), var(--teal));
  border: none;
  padding: 11px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  box-shadow: 0 0 14px rgba(70,240,255,0.4);
  transition: transform 0.1s, box-shadow 0.2s;
}
button:hover { transform: translateY(-1px); box-shadow: 0 0 20px rgba(70,240,255,0.7); }
button:active { transform: translateY(0); }
.toggle {
  font-size: 12px; letter-spacing: 1px;
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; color: var(--cyan-soft);
}
.toggle input { accent-color: var(--cyan); width: 15px; height: 15px; }

.hint {
  position: fixed; bottom: 16px; left: 14px;
  z-index: 10;
  font-size: 11px; letter-spacing: 1.5px;
  color: var(--cyan); opacity: 0.6;
  background: rgba(3,12,22,0.5);
  padding: 8px 14px; border-radius: 8px;
  border: 1px solid rgba(70,240,255,0.14);
}

/* ---------- Promotion dialog ---------- */
.promo {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 30;
  background: linear-gradient(160deg, rgba(8,26,46,0.92), rgba(4,16,28,0.92));
  border: 1px solid var(--glass-line);
  box-shadow: var(--glow);
  border-radius: 14px;
  padding: 22px 26px;
  text-align: center;
}
.promo-h {
  font-family: var(--font-display);
  letter-spacing: 3px; font-size: 14px;
  color: var(--cyan); margin-bottom: 16px;
}
.promo-row { display: flex; gap: 12px; }
.promo-row button { font-size: 14px; padding: 14px 16px; }

/* ---------- Banner ---------- */
.banner {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 28;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 38px; letter-spacing: 6px;
  color: #eafdff;
  text-shadow: 0 0 24px rgba(70,240,255,0.85);
  padding: 26px 50px;
  border: 1px solid var(--glass-line);
  border-radius: 16px;
  background: rgba(3,12,22,0.62);
  box-shadow: var(--glow);
  text-align: center;
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.7; } }

.hidden { display: none !important; }

/* ---------- Mobile ---------- */
@media (max-width: 820px) {
  #sidebar { display: none; }
  .title { font-size: 14px; letter-spacing: 1.5px; }
  .author { display: none; }
  .hint { font-size: 9px; }
}