* { box-sizing: border-box; }
:root {
  --bg: #e3e8f1;
  --card: #ffffff;
  --text: #172033;
  --muted: #68748c;
  --border: #e2e7f0;
  --accent: #4f46e5;
  --accent-dark: #4338ca;
  --accent-soft: #eef0ff;
  --good: #15803d;
  --good-bg: #e7f7ee;
  --bad: #dc2626;
  --bad-bg: #fdecec;
  --shadow: 0 10px 28px rgba(23, 32, 51, 0.09);
  --shadow-sm: 0 3px 10px rgba(23, 32, 51, 0.08);
}
body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #e3e8f1;
  background: linear-gradient(180deg, #eef1f7 0%, #dbe1eb 100%);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  user-select: none;
  -webkit-user-select: none;
  line-height: 1.5;
}

/* HUD */
.hud {
  display: flex; justify-content: space-between; align-items: center;
  gap: 10px; flex-wrap: wrap;
  padding: 12px 20px; background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 5;
}
.logo { font-family: "Space Grotesk", "Inter", sans-serif; font-weight: 700; font-size: 19px; display: flex; align-items: center; gap: 8px; letter-spacing: 0.2px; text-decoration: none; color: var(--text); cursor: pointer; }
.logo-mark {
  width: 32px; height: 32px; display: inline-grid; place-items: center;
  background: var(--accent-soft); border-radius: 10px; font-size: 18px;
}
.logo-img { width: 50px; object-fit: cover; display: block; }
.hud-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  background: #f6f8fc; border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 14px; font-size: 13.5px; color: var(--muted); font-weight: 600;
}
.chip strong { color: var(--text); margin-left: 4px; font-variant-numeric: tabular-nums; }
.chip-score { background: var(--text); color: #cbd2e1; border-color: var(--text); }
.chip-score strong { color: #ffd84d; }
.chip.bump { animation: chipBump 0.4s ease; }
@keyframes chipBump { 0% { transform: scale(1); } 40% { transform: scale(1.1); } 100% { transform: scale(1); } }

/* layout */
.container { width: 100%; max-width: 660px; margin: 0 auto; padding: 28px 16px 48px; flex: 1; display: flex; flex-direction: column; min-height: calc(100vh - 58px); min-height: calc(100svh - 58px); }
.container .card { width: 100%; margin: auto 0; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 20px;
  padding: 30px; box-shadow: var(--shadow);
  animation: cardIn 0.28s ease both;
}
@keyframes cardIn { from { opacity: 0; transform: translateY(10px) scale(0.99); } to { opacity: 1; transform: none; } }
.hidden { display: none !important; }
h1 { margin: 0; font-family: "Space Grotesk", "Inter", sans-serif; font-weight: 700; font-size: 34px; letter-spacing: -0.5px; }
h2 { margin: 4px 0 12px; font-family: "Space Grotesk", "Inter", sans-serif; font-weight: 600; font-size: 22px; letter-spacing: -0.2px; }
.muted { color: var(--muted); }
.tagline { margin: 4px 0 20px; font-size: 15.5px; }
.hint { font-size: 13px; color: var(--muted); text-align: center; margin-bottom: 0; }
.center { text-align: center; }
.kicker {
  display: inline-block; font-size: 11.5px; font-weight: 800; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--accent); margin-bottom: 2px;
}
.kicker.center { display: block; }

/* buttons */
.btn {
  border: 1px solid var(--border); background: linear-gradient(180deg, #ffffff 0%, #edf1f7 100%); color: var(--text);
  border-radius: 12px; padding: 10px 16px; font-size: 15px; font-weight: 700; cursor: pointer;
  font-family: "Space Grotesk", "Inter", sans-serif; font-weight: 600; letter-spacing: 0.2px;
  transition: transform 0.08s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { background: linear-gradient(180deg, #ffffff 0%, #e3e9f2 100%); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn:active { transform: scale(0.97); box-shadow: none; }
.btn.primary {
  background: linear-gradient(180deg, #6366f1 0%, #4f46e5 100%); border-color: var(--accent-dark); color: #fff;
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.35);
}
.btn.primary:hover { background: linear-gradient(180deg, #5a5ef0 0%, #4338ca 100%); }
.btn-big { width: 100%; padding: 14px; font-size: 16.5px; border-radius: 14px; margin-top: 4px; }
.btn-share {
  background: linear-gradient(180deg, #f4f6ff 0%, #e2e7fd 100%);
  border-color: #c9cffc;
  color: var(--accent-dark);
  box-shadow: var(--shadow-sm);
}
.btn-share:hover { background: linear-gradient(180deg, #ecefff 0%, #d7ddfc 100%); box-shadow: 0 5px 14px rgba(79, 70, 229, 0.22); }
#shareMsg { min-height: 20px; margin-top: 10px; }
#shareMsg.ok { color: var(--good); font-weight: 700; }
.btn-row { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.btn-row.center { justify-content: center; margin-top: 18px; }
.btn-row.nudge .btn { flex: 1; padding: 9px 0; background: #f6f8fc; }
.btn-row .grow { flex: 1; }

/* memorize */
.row { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.timer {
  font-weight: 800; font-size: 20px; font-variant-numeric: tabular-nums;
  background: var(--text); color: #fff; border-radius: 12px; padding: 4px 14px;
}
.timer.urgent { background: var(--bad); animation: urgentPulse 0.5s ease-in-out infinite; }
@keyframes urgentPulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.08); } }
.timer-bar { height: 10px; background: #e7ebf3; border-radius: 999px; overflow: hidden; margin: 14px 0 18px; }
.timer-bar > div { height: 100%; width: 100%; background: var(--accent); border-radius: 999px; }
.memo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.memo-cell {
  border: 1px solid var(--border); border-radius: 16px; aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center;
  font-size: 58px; background: #f7f9fd; box-shadow: var(--shadow-sm);
  animation: popIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.memo-cell:nth-child(2) { background: #f0fdf6; }
.memo-cell:nth-child(3) { background: #fff8eb; }
@keyframes popIn { from { opacity: 0; transform: scale(0.6); } to { opacity: 1; transform: scale(1); } }
.memo-cell span { display: inline-block; line-height: 1; }

/* recall */
.target {
  background: var(--accent-soft); border-radius: 8px; padding: 0 10px;
  border: 1px solid #d9deff; white-space: nowrap;
}
.recall-layout { display: grid; grid-template-columns: 232px 1fr; gap: 22px; align-items: start; margin-top: 6px; }
.dial-wrap {
  position: relative; width: 224px; height: 224px; margin: 0 auto;
  border: 1px solid var(--border); border-radius: 50%; background: #f7f9fd;
  display: flex; align-items: center; justify-content: center;
  touch-action: none; cursor: grab; box-shadow: inset 0 2px 10px rgba(23,32,51,0.06);
  transition: transform 0.15s ease;
}
.dial-wrap.dragging { transform: scale(1.03); cursor: grabbing; }
.dial-ring { position: absolute; inset: 12px; border-radius: 50%; border: 2px dashed #d3d9e8; pointer-events: none; }
.dial-pointer {
  position: absolute; top: 6px; left: 50%; width: 10px; height: 26px;
  background: var(--accent); border-radius: 6px;
  transform-origin: 50% 106px; transform: translateX(-50%) rotate(0deg);
  box-shadow: var(--shadow-sm); z-index: 2;
}
.big-emoji { font-size: 92px; line-height: 1; pointer-events: none; }
.angle {
  position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: #fff; border-radius: 999px;
  padding: 3px 14px; font-weight: 800; font-size: 14px; font-variant-numeric: tabular-nums;
  box-shadow: var(--shadow-sm);
}
.controls { background: #f7f9fd; border: 1px solid var(--border); border-radius: 16px; padding: 14px; }
input[type="range"] { width: 100%; height: 34px; accent-color: var(--accent); cursor: pointer; }
input[type="range"]::-webkit-slider-runnable-track { height: 8px; background: #dde3ef; border-radius: 999px; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 22px; height: 22px; margin-top: -7px;
  background: #fff; border: 2px solid var(--accent); border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

/* feedback */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 14px 0; }
.compare-box {
  border: 1px solid var(--border); border-radius: 16px; padding: 16px 12px;
  text-align: center; background: #f7f9fd; box-shadow: var(--shadow-sm);
  animation: slideUp 0.35s ease both;
}
.compare-box.correct { background: #f0fdf6; }
.compare-box:nth-child(2) { animation-delay: 0.08s; }
@keyframes slideUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.compare-label { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); font-weight: 800; margin-bottom: 12px; }
.compare-emoji { font-size: 56px; width: 88px; height: 88px; display: flex; align-items: center; justify-content: center; margin: 0 auto; line-height: 1; }
.compare-angle { margin-top: 10px; font-weight: 800; display: inline-block; background: var(--text); color: #fff; padding: 3px 14px; border-radius: 999px; font-variant-numeric: tabular-nums; }
.stat-merged {
  border: 1px solid var(--border); border-radius: 14px; padding: 12px 16px;
  background: #fff; text-align: center; font-size: 17px; font-weight: 600; color: var(--muted);
  margin: 4px 0 12px; font-variant-numeric: tabular-nums;
}
.stat-merged strong { color: var(--text); font-size: 20px; }
.stat-merged strong.pop { animation: scorePop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1); }
@keyframes scorePop { 0% { transform: scale(0.4); } 60% { transform: scale(1.25); } 100% { transform: scale(1); } }
.card.shake { animation: shakeX 0.4s ease; }
@keyframes shakeX { 0%, 100% { transform: translateX(0); } 20% { transform: translateX(-7px); } 40% { transform: translateX(6px); } 60% { transform: translateX(-4px); } 80% { transform: translateX(3px); } }

/* game over */
.final { margin: 0; }
.final strong { font-size: 52px; letter-spacing: -1px; font-variant-numeric: tabular-nums; }
.newbest { display: inline-block; background: var(--good-bg); color: var(--good); padding: 6px 16px; border-radius: 999px; font-weight: 800; margin: 6px 0 0; }
.newbest:not(.hidden) { animation: scorePop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both; }
.history { margin: 18px 0 4px; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; text-align: left; }
.history:empty { display: none; }
.lb-row {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 10px 14px; font-size: 14px; background: #fff;
  border-bottom: 1px solid var(--border);
  animation: slideUp 0.3s ease both;
}
.lb-row:nth-child(odd) { background: #f7f9fd; }
.lb-row:last-child { border-bottom: none; }
.lb-row .pos { color: var(--good); font-weight: 800; }
.lb-row .neg { color: var(--bad); font-weight: 800; }
.confetti-piece { position: fixed; top: 0; left: 0; z-index: 60; pointer-events: none; line-height: 1; will-change: transform, opacity; }

/* SEO content */
.seo { border-top: 1px solid var(--border); background: var(--card); }
.seo-inner { max-width: 660px; margin: 0 auto; padding: 32px 16px 48px; }
.seo-inner h2 { font-size: 20px; margin-bottom: 8px; }
.seo-inner h3 { font-size: 16px; margin: 22px 0 6px; }
.seo-inner p, .seo-inner li { font-size: 14.5px; color: #3c4761; }
.seo-inner ol, .seo-inner ul { padding-left: 20px; margin: 8px 0; display: grid; gap: 6px; }

/* footer */
.footer { text-align: center; font-size: 13px; color: var(--muted); padding: 18px 16px; border-top: 1px solid var(--border); background: var(--card); }

@media (max-width: 600px) {
  .card { padding: 22px 18px; }
  .recall-layout { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}