/* ================================================================
   PRISM — crystalline glass UI
   Palette: deep void indigo, cyan/violet/magenta facet light, gold accent
   ================================================================ */

:root {
  --void: #07060f;
  --void-deep: #030208;
  --glass: rgba(24, 21, 46, 0.55);
  --glass-deep: rgba(12, 10, 26, 0.7);
  --ink: #eef0ff;
  --ink-dim: #9a93c4;
  --cyan: #63e8ff;
  --violet: #a78bff;
  --magenta: #ff7ae0;
  --gold: #ffd166;
  --shadow: rgba(0, 0, 0, 0.55);
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Manrope", sans-serif;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 28%, #15112d 0%, #0a0818 55%, var(--void-deep) 100%);
  font-family: var(--font-body);
  color: var(--ink);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: pointer;
}

/* ---- fine grain over everything, very subtle ---- */
#grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 60;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.08 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

.hidden { display: none !important; }

/* ===================== HUD ===================== */
#hud {
  position: fixed;
  top: max(18px, env(safe-area-inset-top));
  left: 0;
  right: 0;
  text-align: center;
  z-index: 10;
  pointer-events: none;
}

#score {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(56px, 10vmin, 96px);
  line-height: 1;
  background: linear-gradient(120deg, var(--cyan), var(--violet) 60%, var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 4px 24px rgba(167, 139, 255, 0.45));
  transition: transform 0.12s ease;
}

#score.pop { transform: scale(1.22) rotate(-3deg); }

#best-line {
  margin-top: 2px;
  font-size: 13px;
  letter-spacing: 0.3em;
  font-weight: 700;
  color: var(--ink-dim);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.6);
}

/* ===================== corner chips ===================== */
#corner-buttons {
  position: fixed;
  top: max(14px, env(safe-area-inset-top));
  right: max(14px, env(safe-area-inset-right));
  display: flex;
  gap: 8px;
  z-index: 30;
}

.chip {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  color: var(--ink);
  font-size: 16px;
  font-family: var(--font-body);
  cursor: pointer;
  box-shadow: 0 4px 14px var(--shadow), 0 0 0 1px rgba(99, 232, 255, 0.06) inset;
  transition: transform 0.1s ease, box-shadow 0.1s ease, color 0.1s ease;
}

.chip:active { transform: translateY(2px) scale(0.96); }
.chip.off { color: var(--ink-dim); text-decoration: line-through; }

/* ===================== screens ===================== */
.screen {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}

/* faceted glass card */
.gem-card {
  position: relative;
  width: min(380px, 92vw);
  background: linear-gradient(160deg, rgba(36, 30, 68, 0.65), rgba(12, 10, 26, 0.78));
  backdrop-filter: blur(22px) saturate(180%);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  padding: 40px 30px 28px;
  text-align: center;
  clip-path: polygon(
    22px 0, calc(100% - 22px) 0, 100% 22px,
    100% calc(100% - 22px), calc(100% - 22px) 100%, 22px 100%,
    0 calc(100% - 22px), 0 22px
  );
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow:
    0 30px 70px rgba(0, 0, 0, 0.6),
    0 0 70px rgba(99, 232, 255, 0.08),
    0 0 0 1px rgba(167, 139, 255, 0.05) inset;
  animation: card-in 0.5s cubic-bezier(0.2, 1.4, 0.4, 1) both;
}

.gem-card.slim { width: min(300px, 88vw); }

@keyframes card-in {
  from { transform: translateY(36px) scale(0.96); opacity: 0; }
  to   { transform: translateY(0) scale(1); opacity: 1; }
}

/* glowing diamond badge */
.facet-mark {
  position: absolute;
  top: -20px;
  right: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  color: var(--void-deep);
  font-size: 22px;
  border-radius: 10px;
  transform: rotate(10deg);
  box-shadow: 0 0 24px rgba(99, 232, 255, 0.55), 0 6px 16px rgba(0, 0, 0, 0.5);
  animation: facet-pulse 2.6s ease-in-out infinite;
}

.facet-mark-red {
  background: linear-gradient(135deg, var(--magenta), #ff4d6d);
  box-shadow: 0 0 24px rgba(255, 122, 224, 0.55), 0 6px 16px rgba(0, 0, 0, 0.5);
}

@keyframes facet-pulse {
  0%, 100% { transform: rotate(10deg) scale(1); }
  50% { transform: rotate(10deg) scale(1.08); }
}

.title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 56px;
  line-height: 0.95;
  letter-spacing: 0.1em;
  background: linear-gradient(120deg, var(--cyan), var(--violet) 55%, var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 4px 30px rgba(167, 139, 255, 0.4));
}

.subtitle {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.5;
}

.rule {
  margin: 18px auto 14px;
  width: 70%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 232, 255, 0.5), rgba(167, 139, 255, 0.5), transparent);
}

.howto {
  font-size: 13px;
  line-height: 2;
  color: var(--ink-dim);
}

.key {
  display: inline-block;
  padding: 1px 9px;
  margin: 0 2px;
  background: rgba(255, 255, 255, 0.06);
  border: 1.5px solid rgba(99, 232, 255, 0.35);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

/* ===================== buttons ===================== */
.big-btn {
  margin-top: 22px;
  width: 100%;
  padding: 14px 18px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(120deg, var(--cyan), var(--violet));
  color: var(--void-deep);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.1em;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(99, 232, 255, 0.3), 0 0 40px rgba(167, 139, 255, 0.25);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.big-btn:hover { transform: translateY(-2px); }
.big-btn:active { transform: translateY(1px); box-shadow: 0 4px 14px rgba(99, 232, 255, 0.25); }

.small-btn {
  padding: 8px 14px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(120deg, var(--magenta), var(--violet));
  color: var(--void-deep);
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.08em;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(255, 122, 224, 0.3);
}

.small-btn:active { transform: translateY(2px); }

.credits {
  margin-top: 18px;
  font-size: 10.5px;
  letter-spacing: 0.15em;
  color: var(--ink-dim);
  opacity: 0.75;
}

.hint {
  margin-top: 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
}

/* ===================== game over ===================== */
.over-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 36px;
  line-height: 1.1;
  color: var(--ink);
  text-shadow: 0 0 30px rgba(255, 122, 224, 0.3);
}

.score-row {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}

.score-box {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 10px 8px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.score-box .label {
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  font-weight: 700;
}

.score-box span:last-child {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--cyan);
}

.new-best {
  margin-top: 14px;
  display: inline-block;
  padding: 4px 16px;
  background: linear-gradient(120deg, var(--gold), var(--magenta));
  color: var(--void-deep);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.2em;
  border-radius: 8px;
  animation: tag-pulse 1.2s ease infinite;
}

@keyframes tag-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.07); }
}

/* ===================== name form ===================== */
.name-form { margin-top: 16px; }

.name-form label {
  display: block;
  font-size: 12px;
  color: var(--ink-dim);
  margin-bottom: 8px;
}

.name-row {
  display: flex;
  gap: 8px;
  justify-content: center;
}

#initials {
  width: 110px;
  padding: 8px 10px;
  border: 1.5px solid rgba(99, 232, 255, 0.35);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.35em;
  text-align: center;
  text-transform: uppercase;
  color: var(--ink);
  outline: none;
}

#initials:focus { border-color: var(--cyan); }

/* ===================== leaderboard ===================== */
.board, .mini-board { margin-top: 16px; text-align: left; }

.board-title {
  font-size: 10px;
  letter-spacing: 0.35em;
  font-weight: 700;
  color: var(--ink-dim);
  text-align: center;
  margin-bottom: 8px;
}

.board-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 3px 10px;
  font-size: 14px;
  border-radius: 6px;
}

.board-row.me {
  background: linear-gradient(120deg, rgba(99, 232, 255, 0.18), rgba(167, 139, 255, 0.18));
}

.board-row.me .board-name, .board-row.me .board-rank { color: var(--cyan); }

.board-rank {
  width: 22px;
  font-size: 11px;
  font-weight: 700;
  color: var(--ink-dim);
}

.board-name {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.2em;
}

.board-dots {
  flex: 1;
  border-bottom: 1px dotted rgba(154, 147, 196, 0.35);
  transform: translateY(-3px);
}

.board-score { font-weight: 700; color: var(--ink); }

.board-empty {
  text-align: center;
  font-size: 12px;
  color: var(--ink-dim);
  font-style: italic;
}

.mini-board .board-row { font-size: 12.5px; padding: 2px 8px; }

/* ===================== small screens ===================== */
@media (max-height: 700px) {
  .gem-card { padding: 30px 24px 22px; }
  .title { font-size: 42px; }
  .mini-board .board-row:nth-child(n+6) { display: none; }
}