/* ===== ナンプレ — Premium テーマ専用スタイルシート =====
   濃紺 + 真鍮アクセント。Claude Design ハンドオフの Premium を採用。
*/

/* ---------- Design tokens (Premium: navy + brass) ---------- */
:root {
  --bg: #0c1530;
  --bg-grad:
    radial-gradient(900px 600px at 80% -10%, #1a2a55 0%, transparent 60%),
    radial-gradient(700px 500px at 0% 110%, #2c1f3f 0%, transparent 55%),
    linear-gradient(180deg, #0a1228 0%, #0c1530 100%);
  --surface: #14224a;
  --surface-2: #0f1a3d;
  --ink: #f4ede0;
  --muted: #8a93b3;
  --hairline: #2a3866;
  --accent: #c9a36a;
  --accent-2: #e0bd84;
  --accent-soft: rgba(201,163,106,0.12);
  --accent-ink: #0c1530;
  --given-ink: #f4ede0;
  --given-bg: #0f1a3d;
  --user-ink: #c9a36a;
  --error-ink: #ff7a8a;
  --error-bg: rgba(255,122,138,0.12);
  --memo-ink: #8a93b3;
  --memo-active: #c9a36a;
  --cell-bg: #142046;
  --cell-selected: #1c2c5e;
  --cell-highlight: #182655;
  --cell-same-line: #16234e;
  --box-border: #c9a36a;
  --cell-border: #1f2c5b;
  --multi: rgba(201,163,106,0.32);
  --multi-border: #c9a36a;
  --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset, 0 24px 60px -20px rgba(0,0,0,0.6);
  --shadow-pop: 0 0 0 1px rgba(201,163,106,0.6), 0 12px 32px -8px rgba(201,163,106,0.55);
  --radius: 14px;
  --radius-sm: 10px;
  --font-display: "Fraunces", "Cormorant Garamond", "Noto Serif JP", serif;
  --font-num: "Fraunces", "Cormorant Garamond", "Noto Serif JP", serif;
  --font-num-weight: 500;
  --font-body: "Inter", "Noto Sans JP", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --letter-display: 0.08em;
  --celebrate-1: #c9a36a;
  --celebrate-2: #e0bd84;
  --celebrate-3: #f4ede0;
  --celebrate-4: #8a6f3c;
  --line-flash-from: rgba(201,163,106,0.45);
  --line-flash-to:   rgba(201,163,106,0.05);
  --box-flash-from:  rgba(244,237,224,0.35);
  --box-flash-to:    rgba(244,237,224,0.05);
}

/* ---------- Reset + body ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html, body { height: 100%; }

body {
  background: var(--bg);
  background-image: var(--bg-grad);
  color: var(--ink);
  font-family: var(--font-body);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 18px 12px 28px;
  font-feature-settings: "tnum" 1, "lnum" 1;
}

/* ---------- Top brand ---------- */
.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 14px;
}
h1.title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 7.2vw, 2.6rem);
  letter-spacing: var(--letter-display);
  color: var(--ink);
  font-weight: 600;
  line-height: 1;
}
:root h1.title {
  font-style: italic;
  letter-spacing: 0.04em;
}
:root h1.title em {
  color: var(--accent);
  font-style: italic;
}
.subtitle {
  font-size: 0.62rem;
  color: var(--muted);
  letter-spacing: 0.32em;
  margin-top: 4px;
  text-transform: uppercase;
}
.brand-rule {
  width: 36px; height: 1px; background: var(--accent); margin-top: 8px;
  opacity: 0.7;
}

/* ---------- Difficulty screen ---------- */
#difficulty-screen {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 10px;
  width: 100%;
  max-width: 360px;
  animation: fadeIn 0.4s ease;
}
.diff-label {
  font-size: 0.62rem;
  letter-spacing: 0.32em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 4px;
  text-align: center;
}
.diff-btn {
  position: relative;
  width: 100%;
  padding: 18px 20px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  box-shadow: var(--shadow-card);
}
.diff-btn:hover, .diff-btn:active {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.diff-btn .dn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  color: var(--accent);
  letter-spacing: var(--letter-display);
}
.diff-btn .dd { font-size: 0.7rem; color: var(--muted); letter-spacing: 0.04em; }
.diff-btn .dr {
  font-family: var(--font-num);
  font-size: 0.72rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}
.diff-btn .dr b { color: var(--ink); font-weight: 600; font-size: 0.85rem; }
.diff-screen-foot {
  display: flex;
  gap: 8px;
  margin-top: 4px;
  justify-content: center;
}
.foot-btn {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.15s;
}
.foot-btn:hover { color: var(--ink); border-color: var(--accent); }

/* ---------- Game screen ---------- */
#game-screen {
  display: none;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 420px;
  gap: 12px;
  animation: fadeIn 0.3s ease;
}
.game-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  padding: 0 4px;
  gap: 8px;
}
.diff-badge {
  justify-self: start;
  font-family: var(--font-num);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--hairline);
}
.timer {
  justify-self: center;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 1.55rem;
  font-weight: var(--font-num-weight);
  letter-spacing: 0.06em;
  color: var(--ink);
  line-height: 1;
}
.timer.warning { color: var(--error-ink); animation: warnPulse 1.4s ease-in-out infinite; }
@keyframes warnPulse { 50% { opacity: 0.55; } }

.header-right {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}
.mistake-counter {
  font-size: 0.66rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
  letter-spacing: 0.08em;
}
.mistake-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--hairline);
  transition: background 0.2s, transform 0.2s;
}
.mistake-dot.used { background: var(--error-ink); transform: scale(1.15); }

.icon-btn {
  width: 30px; height: 30px;
  border-radius: 8px;
  border: 1px solid var(--hairline);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.95rem;
  transition: all 0.15s;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Best-time strip ---------- */
.best-strip {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}
.best-strip b {
  color: var(--ink);
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 0.78rem;
  margin-left: 6px;
  text-transform: none;
}
.best-strip .bs-trail {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.18em;
}

/* ---------- Board ---------- */
.board-wrap {
  width: 100%;
  aspect-ratio: 1;
  max-width: 420px;
  position: relative;
  filter: drop-shadow(0 18px 40px rgba(15,23,42,0.18));
}

/* Sparkles for completed line/box */
.sparkle {
  position: absolute;
  pointer-events: none;
  width: 14px; height: 14px;
  z-index: 50;
  opacity: 0;
  transform-origin: center;
  animation: sparkleFloat 0.95s ease-out forwards;
}
.sparkle::before, .sparkle::after {
  content: '';
  position: absolute;
  background: linear-gradient(180deg, var(--accent-2, var(--accent)), var(--accent));
  border-radius: 1.5px;
  box-shadow: 0 0 6px var(--accent), 0 0 12px var(--accent);
}
.sparkle::before {
  width: 100%; height: 2px;
  top: 50%; left: 0;
  transform: translateY(-50%);
}
.sparkle::after {
  width: 2px; height: 100%;
  left: 50%; top: 0;
  transform: translateX(-50%);
}
.sparkle.gold::before, .sparkle.gold::after {
  background: linear-gradient(180deg, #fff5d6, #f4b942);
  box-shadow: 0 0 6px #f4b942, 0 0 14px #f4b942;
}
@keyframes sparkleFloat {
  0%   { opacity: 0; transform: scale(0) rotate(0deg) translateY(0); }
  25%  { opacity: 1; transform: scale(1.3) rotate(60deg) translateY(-2px); }
  60%  { opacity: 0.9; transform: scale(0.85) rotate(140deg) translateY(-6px); }
  100% { opacity: 0; transform: scale(0) rotate(220deg) translateY(-14px); }
}

/* Hint character */
#hint-character {
  position: fixed;
  bottom: 20px;
  left: 50%;
  width: 280px; height: 280px;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, 200%) scale(0.6);
  transition: transform 0.45s cubic-bezier(.34,1.56,.64,1), opacity 0.3s;
}
#hint-character.show {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
  animation: hintBob 1.2s ease-in-out 0.45s 1;
}
@keyframes hintBob {
  0%, 100% { transform: translate(-50%, 0) rotate(0deg); }
  25%      { transform: translate(-50%, -10px) rotate(-4deg); }
  50%      { transform: translate(-50%, 0) rotate(0deg); }
  75%      { transform: translate(-50%, -6px) rotate(3deg); }
}
#hint-character .hc-bubble {
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--accent-ink);
  padding: 6px 14px;
  border-radius: 16px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  box-shadow: var(--shadow-pop);
  white-space: nowrap;
}
#hint-character .hc-bubble::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--accent);
  border-bottom: 0;
}
#hint-character img {
  width: 100%; height: 100%;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 8px 20px rgba(0,0,0,0.35));
}

/* ヒント書き込みキャラ（ヒント2/3を対象マス上で交互表示） */
.hint-writer {
  position: absolute;
  pointer-events: none;
  z-index: 60;
  transition: transform 0.09s ease, opacity 0.12s ease;
}
.hint-writer img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.4));
}
.hint-writer.done { opacity: 0; }
#hint-character .hc-placeholder {
  width: 100%; height: 100%;
  background: var(--surface);
  border: 2px dashed var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.2rem;
  color: var(--accent);
  box-shadow: var(--shadow-pop);
}
:root #hint-character .hc-placeholder {
  background: linear-gradient(180deg, #14224a 0%, #0f1a3d 100%);
}
:root .board-wrap { filter: drop-shadow(0 18px 40px rgba(0,0,0,0.5)); }

.board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  width: 100%;
  height: 100%;
  border: 2px solid var(--box-border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--box-border);
  gap: 0;
  position: relative;
}

.cell {
  background: var(--cell-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  user-select: none;
  transition: background 0.15s ease;
  border-right: 1px solid var(--cell-border);
  border-bottom: 1px solid var(--cell-border);
  overflow: hidden;
  min-width: 0; min-height: 0;
}
.cell:nth-child(3n) { border-right: 2px solid var(--box-border); }
.cell:nth-child(9n) { border-right: none; }
.cell:nth-child(n+19):nth-child(-n+27) { border-bottom: 2px solid var(--box-border); }
.cell:nth-child(n+46):nth-child(-n+54) { border-bottom: 2px solid var(--box-border); }
.cell:nth-child(n+73):nth-child(-n+81) { border-bottom: none; }

.cell.given { background: var(--given-bg); cursor: default; }
.cell.selected { background: var(--cell-selected); }
.cell.highlight { background: var(--cell-highlight); }
.cell.same-line { background: var(--cell-same-line); }
.cell.error { background: var(--error-bg); }

.cell.same-val .cell-num { color: var(--accent); font-weight: 700; }
:root .cell.same-val .cell-num {
  text-shadow: 0 0 12px rgba(201,163,106,0.5);
}
.cell.same-val-memo .memo-num { opacity: 0.35; }
.cell.same-val-memo .memo-num.active-memo {
  font-weight: 800;
  color: var(--accent);
  opacity: 1;
}

.cell-num {
  font-family: var(--font-num);
  font-weight: var(--font-num-weight);
  font-size: clamp(1rem, 4.6vw, 1.8rem);
  letter-spacing: 0;
  color: var(--user-ink);
  line-height: 1;
}
.cell.given .cell-num { color: var(--given-ink); font-weight: 700; }
.cell.error .cell-num { color: var(--error-ink); }

/* memo */
.cell-memo {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  position: absolute;
  inset: 0;
  padding: 1px;
}
.memo-num {
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-num);
  font-size: clamp(0.45rem, 1.85vw, 0.66rem);
  color: var(--memo-ink);
  font-weight: 600;
  line-height: 1;
  opacity: 0.85;
}

/* hint cell */
.cell.hinted { background: var(--accent-soft) !important; }
.cell.hinted .cell-num {
  animation: hintPop 0.6s cubic-bezier(.17,.67,.35,1.3);
  color: var(--accent) !important;
}
/* 書き込みアニメ中：対象マスを金色にして「書いている」感を出す */
.cell.hint-writing { background: rgba(201,163,106,0.55) !important; }
@keyframes hintPop {
  0% { transform: scale(0.4); opacity: 0; filter: blur(4px); }
  60% { transform: scale(1.25); opacity: 1; filter: blur(0); }
  100% { transform: scale(1); }
}

/* number entry pop */
@keyframes numPop {
  0%   { transform: scale(0.35); opacity: 0; }
  60%  { transform: scale(1.18); opacity: 1; }
  100% { transform: scale(1); }
}
.cell.entered .cell-num { animation: numPop 0.28s cubic-bezier(.34,1.56,.64,1); }

/* error shake */
@keyframes shakeErr {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(3px); }
  30%, 50%, 70% { transform: translateX(-5px); }
  40%, 60% { transform: translateX(5px); }
}
.cell.shake { animation: shakeErr 0.5s; }

/* multi-select */
.cell.multi-selected {
  background: var(--multi) !important;
  outline: 2px solid var(--multi-border);
  outline-offset: -2px;
  z-index: 2;
}

/* line/box flash */
@keyframes lineFlash {
  0%   { background: var(--cell-bg); }
  25%  { background: var(--line-flash-from); }
  60%  { background: var(--line-flash-to); }
  100% { background: var(--cell-bg); }
}
@keyframes boxFlash {
  0%   { background: var(--cell-bg); }
  25%  { background: var(--box-flash-from); }
  60%  { background: var(--box-flash-to); }
  100% { background: var(--cell-bg); }
}
@keyframes givenLineFlash {
  0%   { background: var(--given-bg); }
  25%  { background: var(--line-flash-from); }
  60%  { background: var(--line-flash-to); }
  100% { background: var(--given-bg); }
}
@keyframes givenBoxFlash {
  0%   { background: var(--given-bg); }
  25%  { background: var(--box-flash-from); }
  60%  { background: var(--box-flash-to); }
  100% { background: var(--given-bg); }
}
.cell.flash-line { animation: lineFlash 0.7s ease forwards; }
.cell.flash-box  { animation: boxFlash 0.7s ease forwards; }
.cell.given.flash-line { animation: givenLineFlash 0.7s ease forwards; }
.cell.given.flash-box  { animation: givenBoxFlash 0.7s ease forwards; }

/* ---------- Multi-select bar ---------- */
#multi-select-bar {
  display: none;
  width: 100%;
  background: var(--multi);
  border: 1px solid var(--multi-border);
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  align-items: center;
  justify-content: space-between;
  animation: fadeIn 0.2s ease;
}
#multi-select-bar.show { display: flex; }
.multi-bar-label {
  font-size: 0.72rem;
  color: var(--multi-border);
  font-weight: 700;
  display: flex; align-items: center; gap: 6px;
}
.multi-bar-count {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  color: var(--multi-border);
  letter-spacing: 0.04em;
}
.btn-multi-cancel {
  font-size: 0.7rem;
  color: var(--multi-border);
  background: transparent;
  border: 1px solid var(--multi-border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
  font-family: var(--font-body);
}

/* ---------- Controls ---------- */
.controls {
  display: flex;
  gap: 6px;
  width: 100%;
  justify-content: center;
}
.ctrl-btn {
  flex: 1;
  padding: 10px 4px;
  border: 1px solid var(--hairline);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.66rem;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  letter-spacing: 0.06em;
  box-shadow: var(--shadow-card);
}
.ctrl-btn .ci { font-size: 1.05rem; line-height: 1; }
.ctrl-btn:hover { border-color: var(--accent); color: var(--accent); }
.ctrl-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  box-shadow: var(--shadow-pop);
}

/* ---------- Numpad ---------- */
.numpad {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 5px;
  width: 100%;
}
.num-btn {
  aspect-ratio: 1;
  border: 1px solid var(--hairline);
  border-radius: 10px;
  background: var(--surface);
  color: var(--user-ink);
  font-family: var(--font-num);
  font-weight: var(--font-num-weight);
  font-size: clamp(1rem, 4vw, 1.5rem);
  cursor: pointer;
  transition: transform 0.1s, background 0.15s, color 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  padding: 2px 0;
  position: relative;
  box-shadow: var(--shadow-card);
}
.num-btn .num-remain {
  font-family: var(--font-body);
  font-size: clamp(0.42rem, 1.6vw, 0.58rem);
  color: var(--muted);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.04em;
}
.num-btn:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.num-btn:hover .num-remain { color: var(--accent-ink); opacity: 0.8; }
.num-btn:active { transform: scale(0.95); box-shadow: var(--shadow-pop); }

.num-btn.completed {
  pointer-events: none;
  color: transparent;
  background: var(--surface-2);
  border-color: var(--hairline);
  opacity: 0.55;
}
.num-btn.completed::after {
  content: '✓';
  position: absolute;
  inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: clamp(0.9rem, 3.5vw, 1.3rem);
  font-family: var(--font-body);
  font-weight: 700;
}
.num-btn.completed .num-remain { display: none; }

/* ---------- Result screen ---------- */
#result-screen {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
  max-width: 360px;
  animation: fadeIn 0.5s ease;
}
.result-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 9.5vw, 3.6rem);
  letter-spacing: var(--letter-display);
  color: var(--accent);
  text-align: center;
  font-weight: 600;
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  width: 100%;
}
.result-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow-card);
}
.rc-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 2rem;
  font-weight: var(--font-num-weight);
  color: var(--accent);
  letter-spacing: 0.04em;
}
.rc-label { font-size: 0.66rem; color: var(--muted); margin-top: 4px; letter-spacing: 0.18em; text-transform: uppercase; }
.btn-restart {
  width: 100%;
  padding: 16px;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.18em;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-pop);
}
.btn-restart:hover { transform: translateY(-1px); filter: brightness(1.05); }

/* ---------- Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Confetti canvas (FIX for broken CSS) ---------- */
#confetti-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* ---------- Clear overlay ---------- */
#clear-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg);
  background-image: var(--bg-grad);
  z-index: 9998;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 18px;
  padding: 24px;
}
#clear-overlay.show { display: flex !important; }

@keyframes clearTitle {
  0%   { opacity: 0; transform: scale(0.4) rotate(-8deg); filter: blur(8px); }
  60%  { transform: scale(1.18) rotate(2deg); opacity: 1; filter: blur(0); }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}
.clear-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 14vw, 5.5rem);
  letter-spacing: var(--letter-display);
  color: var(--accent);
  font-weight: 600;
  text-align: center;
  line-height: 1;
  animation: clearTitle 0.85s cubic-bezier(.17,.67,.35,1.3) forwards;
}
:root .clear-title {
  font-style: italic;
  text-shadow: 0 4px 30px rgba(201,163,106,0.5);
}
.clear-sub {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 0.5s ease 0.6s forwards;
}
.clear-stats {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 16px;
  padding: 18px 28px;
  display: flex;
  gap: 28px;
  box-shadow: var(--shadow-card);
  opacity: 0;
  animation: fadeIn 0.5s ease 0.85s forwards;
}
.cs-item { text-align: center; }
.cs-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 2rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  font-weight: var(--font-num-weight);
}
.cs-label { font-size: 0.62rem; color: var(--muted); margin-top: 4px; letter-spacing: 0.18em; text-transform: uppercase; }
.cs-best {
  margin-top: 6px;
  font-size: 0.62rem;
  color: var(--celebrate-2);
  font-weight: 700;
  letter-spacing: 0.2em;
}
.clear-btn {
  padding: 14px 36px;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.2em;
  font-weight: 600;
  cursor: pointer;
  opacity: 0;
  animation: fadeIn 0.5s ease 1.1s forwards;
  box-shadow: var(--shadow-pop);
}

/* ---------- Modal (settings / stats) ---------- */
.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(6px);
  z-index: 9990;
  align-items: center; justify-content: center;
  padding: 16px;
}
.modal-backdrop.show { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 22px;
  width: 100%; max-width: 360px;
  box-shadow: var(--shadow-card);
  animation: fadeIn 0.25s ease;
  color: var(--ink);
}
.modal h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: var(--letter-display);
  color: var(--accent);
  margin-bottom: 14px;
}
.modal-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--hairline);
  font-size: 0.85rem;
}
.modal-row:last-of-type { border-bottom: none; }
.modal-row .lbl { color: var(--ink); }
.modal-row .val {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--accent);
}
.toggle {
  width: 42px; height: 24px;
  border-radius: 999px;
  background: var(--hairline);
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
  border: none;
}
.toggle::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.toggle.on { background: var(--accent); }
.toggle.on::after { transform: translateX(18px); }
.modal-close {
  margin-top: 16px;
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.18em;
  cursor: pointer;
}

/* ---------- Stats grid ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 8px 0 4px;
}
.stat-cell {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 10px 6px;
  text-align: center;
}
.stat-cell .sc-diff {
  font-family: var(--font-num);
  font-size: 0.62rem;
  color: var(--muted);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.stat-cell .sc-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 1.6rem;
  font-weight: var(--font-num-weight);
  color: var(--accent);
  margin-top: 4px;
}
.stat-cell .sc-time {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 0.78rem;
  color: var(--ink);
  margin-top: 2px;
}
.stat-cell .sc-foot {
  font-size: 0.6rem;
  color: var(--muted);
  margin-top: 2px;
  letter-spacing: 0.1em;
}

/* ---------- Loader ---------- */
#loader {
  display: none;
  position: fixed; inset: 0;
  background: var(--bg);
  background-image: var(--bg-grad);
  z-index: 9997;
  align-items: center; justify-content: center;
  flex-direction: column; gap: 14px;
}
#loader.show { display: flex; }
.loader-mark {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--accent);
  letter-spacing: 0.32em;
}
.loader-bar {
  width: 120px; height: 2px;
  background: var(--hairline);
  overflow: hidden;
  border-radius: 2px;
}
.loader-bar::after {
  content: '';
  display: block;
  height: 100%;
  width: 40%;
  background: var(--accent);
  animation: loaderSlide 1.1s ease-in-out infinite;
}
@keyframes loaderSlide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(300%); }
}

/* ============================================================
   PREMIUM polish — gold hairlines, vignette, refined detail
   ============================================================ */
:root body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(circle at 50% 50%, transparent 50%, rgba(0,0,0,0.55) 100%),
    repeating-linear-gradient(45deg, transparent 0 6px, rgba(201,163,106,0.014) 6px 7px);
  pointer-events: none;
  z-index: 0;
}
:root body > * { position: relative; z-index: 1; }

:root h1.title {
  background: linear-gradient(180deg, #f4ede0 0%, #c9a36a 70%, #8a6f3c 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-style: italic;
  position: relative;
}
:root h1.title::after {
  content: '';
  position: absolute;
  left: 50%; bottom: -8px;
  transform: translateX(-50%);
  width: 56px; height: 1px;
  background: linear-gradient(90deg, transparent 0%, #c9a36a 50%, transparent 100%);
}
:root .brand-rule { display: none; }

:root .diff-btn {
  background: linear-gradient(180deg, #14224a 0%, #0f1a3d 100%);
  border: 1px solid rgba(201,163,106,0.25);
  position: relative;
  overflow: hidden;
}
:root .diff-btn::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent 0%, #c9a36a 30%, #c9a36a 70%, transparent 100%);
  opacity: 0.5;
  transition: opacity 0.2s, width 0.2s;
}
:root .diff-btn:hover::before { opacity: 1; width: 3px; }
:root .diff-btn:hover {
  border-color: #c9a36a;
  box-shadow: 0 12px 32px -16px rgba(201,163,106,0.5), 0 0 0 1px rgba(201,163,106,0.3) inset;
}
:root .diff-btn .dn {
  font-style: italic;
  background: linear-gradient(180deg, #e0bd84, #c9a36a);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

:root .board {
  background: #c9a36a;
  border: 2px solid #c9a36a;
  box-shadow: 0 0 0 1px #14224a, 0 0 0 6px #0c1530, 0 0 0 7px rgba(201,163,106,0.4);
}
:root .cell {
  border-right: 1px solid rgba(201,163,106,0.18);
  border-bottom: 1px solid rgba(201,163,106,0.18);
}
:root .cell:nth-child(3n) { border-right: 1.5px solid rgba(201,163,106,0.65); }
:root .cell:nth-child(9n) { border-right: none; }
:root .cell:nth-child(n+19):nth-child(-n+27) { border-bottom: 1.5px solid rgba(201,163,106,0.65); }
:root .cell:nth-child(n+46):nth-child(-n+54) { border-bottom: 1.5px solid rgba(201,163,106,0.65); }
:root .cell:nth-child(n+73):nth-child(-n+81) { border-bottom: none; }

:root .cell.given .cell-num { font-style: italic; color: #f4ede0; }
:root .cell .cell-num { font-style: italic; font-weight: 500; letter-spacing: -0.02em; }

:root .num-btn {
  background: linear-gradient(180deg, #14224a 0%, #0f1a3d 100%);
  border: 1px solid rgba(201,163,106,0.22);
  color: #c9a36a;
  font-style: italic;
}
:root .num-btn:hover {
  background: linear-gradient(180deg, #c9a36a 0%, #8a6f3c 100%);
  color: #0c1530;
  border-color: #c9a36a;
  box-shadow: 0 0 24px -4px rgba(201,163,106,0.6);
}
:root .num-btn.completed { background: #0a1228; opacity: 0.4; }
:root .num-btn.completed::after { color: #c9a36a; }

:root .ctrl-btn {
  background: linear-gradient(180deg, #14224a 0%, #0f1a3d 100%);
  border: 1px solid rgba(201,163,106,0.18);
}
:root .ctrl-btn:hover { border-color: #c9a36a; color: #c9a36a; }
:root .ctrl-btn.active {
  background: linear-gradient(180deg, #c9a36a 0%, #8a6f3c 100%);
  color: #0c1530;
  border-color: #c9a36a;
}

:root .diff-badge {
  background: rgba(201,163,106,0.1);
  border-color: rgba(201,163,106,0.4);
}
:root .timer { font-style: italic; }
:root .best-strip {
  background: linear-gradient(180deg, #14224a 0%, #0f1a3d 100%);
  border-color: rgba(201,163,106,0.2);
}
:root .best-strip b { color: #c9a36a; font-style: italic; }
:root .clear-stats {
  background: linear-gradient(180deg, #14224a 0%, #0f1a3d 100%);
  border: 1px solid rgba(201,163,106,0.4);
  box-shadow: 0 24px 60px -10px rgba(0,0,0,0.7), 0 0 0 1px rgba(201,163,106,0.2);
}
:root .clear-btn {
  background: linear-gradient(180deg, #c9a36a 0%, #8a6f3c 100%);
  font-style: italic;
}
:root .modal {
  background: linear-gradient(180deg, #14224a 0%, #0f1a3d 100%);
  border: 1px solid rgba(201,163,106,0.3);
}
:root .modal h2 { font-style: italic; }
:root .stat-cell {
  background: rgba(201,163,106,0.04);
  border-color: rgba(201,163,106,0.18);
}
:root .icon-btn {
  background: rgba(201,163,106,0.08);
  border-color: rgba(201,163,106,0.25);
  color: #c9a36a;
}