:root {
  --bg: #0b1020;
  --card: #141c33;
  --line: #2b3866;
  --text: #e9eefb;
  --muted: #8f9ec9;
  --accent: #ffcc4d;
  --paper: #f3ead7;
  --ok: #4ade80;
  --ng: #ff6b6b;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1000px 600px at 20% -10%, #1c2a55 0%, transparent 60%),
    radial-gradient(800px 500px at 85% 0%, #3a1c46 0%, transparent 58%),
    var(--bg);
  color: var(--text);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  -webkit-tap-highlight-color: transparent;
}
.app { max-width: 560px; margin: 0 auto; padding: 24px 16px 48px; }
button { font-family: inherit; }
a { color: #9fc7ff; }

/* ---- タイトル ---- */
.start h1 {
  margin: 8px 0 14px;
  font-size: clamp(28px, 8vw, 40px);
  line-height: 1.2;
}
.start h1 span {
  display: block;
  font-size: 15px;
  color: var(--accent);
  letter-spacing: 0.35em;
  margin-top: 6px;
}
.lead { color: var(--muted); font-size: 14.5px; margin: 0 0 20px; }
.lead strong { color: var(--text); }
.loading { color: var(--muted); font-size: 14px; }

.levels { display: grid; gap: 12px; margin-bottom: 22px; }
.levels button {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2px 10px;
  text-align: left;
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #18213c, var(--card));
  color: var(--text);
  cursor: pointer;
  transition: transform .15s ease, border-color .15s ease;
}
.levels button:hover { transform: translateY(-2px); border-color: #4a5ea3; }
.levels button b { font-size: 18px; }
.levels button small { grid-column: 1; color: var(--muted); font-size: 12.5px; }
.levels button .best {
  grid-row: 1 / span 2;
  grid-column: 2;
  font-size: 12px;
  color: var(--accent);
  white-space: nowrap;
}
.levels button.primary { border-color: var(--accent); }

.tips { color: var(--muted); font-size: 13px; padding-left: 1.2em; margin: 0 0 18px; }
.tips strong, .tips b { color: var(--text); }
kbd {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 12px;
}
.home { font-size: 13px; }

/* ---- HUD ---- */
.hud {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.stat { display: flex; flex-direction: column; line-height: 1.25; }
.stat .k { font-size: 10.5px; color: var(--muted); letter-spacing: .08em; }
.stat .v { font-size: 17px; font-weight: 700; font-variant-numeric: tabular-nums; }
.hearts { color: #ff6b8b; }
.hearts .dead { color: #3c4772; }
.hud .ghost { margin-left: auto; }

.ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12.5px;
  cursor: pointer;
}
.ghost:hover { color: var(--text); border-color: #4a5ea3; }

.timeTrack {
  height: 8px;
  background: #1b2340;
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 14px;
}
.timeBar {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #4dd0ff, #a78bfa);
  border-radius: 999px;
}
.timeBar.danger { background: linear-gradient(90deg, #ff9f4d, var(--ng)); }

/* ---- ステージ ---- */
.stageWrap {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  overflow: hidden;
  background:
    radial-gradient(120% 120% at 50% 15%, #fffaf0 0%, var(--paper) 62%, #ddd0b4 100%);
  border: 1px solid #6b6247;
  box-shadow: 0 18px 42px rgba(0,0,0,.45);
  margin-bottom: 16px;
}
#stage { width: 100%; height: 100%; display: block; }

.feedback {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(11, 16, 32, .88);
  backdrop-filter: blur(4px);
  font-size: 15px;
}
.feedback .mark { font-weight: 800; }
.feedback.ok .mark { color: var(--ok); }
.feedback.ng .mark { color: var(--ng); }
.feedback .emoji { font-size: 24px; line-height: 1; }
.feedback .name { font-weight: 700; }
.feedback .gain { margin-left: auto; color: var(--accent); font-weight: 700; }

/* ---- 選択肢 ---- */
.choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}
.choice {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #18213c, var(--card));
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: transform .12s ease, border-color .12s ease;
}
.choice:hover:not(:disabled) { transform: translateY(-2px); border-color: #4a5ea3; }
.choice:disabled { cursor: default; opacity: .75; }
.choice .key {
  flex: none;
  width: 20px; height: 20px;
  display: grid; place-items: center;
  border-radius: 6px;
  background: rgba(255,255,255,.08);
  font-size: 11px;
  color: var(--muted);
}
.choice.right {
  border-color: var(--ok);
  background: linear-gradient(180deg, #17402c, #12301f);
  opacity: 1;
}
.choice.wrong {
  border-color: var(--ng);
  background: linear-gradient(180deg, #40191f, #2c1218);
  opacity: 1;
}

.hint {
  width: 100%;
  padding: 11px;
  border-radius: 12px;
  border: 1px dashed var(--line);
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
}
.hint:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }
.hint:disabled { opacity: .4; cursor: default; }

/* ---- リザルト ---- */
.result h2 { margin: 8px 0 10px; font-size: 26px; }
.result h3 { margin: 22px 0 8px; font-size: 15px; color: var(--muted); }
.newBest { color: var(--accent); font-weight: 700; margin: 0 0 4px; }
.bigScore { margin: 0; font-size: 56px; font-weight: 800; line-height: 1.1; font-variant-numeric: tabular-nums; }
.bigScore small { font-size: 18px; color: var(--muted); margin-left: 6px; }
.best2 { margin: 2px 0 6px; color: var(--accent); font-size: 14px; }
.detail { margin: 0; color: var(--muted); font-size: 14px; }
.missList { margin: 0; padding-left: 1.2em; color: var(--muted); font-size: 14px; }
.missList .perfect { color: var(--ok); }
.resultBtns { display: flex; gap: 10px; margin: 22px 0 14px; flex-wrap: wrap; }
.resultBtns .primary {
  flex: 1;
  padding: 12px 18px;
  border: none;
  border-radius: 999px;
  background: var(--accent);
  color: #12182b;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
}

@media (max-width: 380px) {
  .choices { gap: 8px; }
  .choice { font-size: 14px; padding: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  .levels button, .choice { transition: none; }
}

/* ---- モード選択 ---- */
.modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}
.modes button {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #18213c, var(--card));
  color: var(--muted);
  cursor: pointer;
  text-align: left;
}
.modes button b { font-size: 15px; color: var(--text); }
.modes button small { font-size: 11.5px; }
.modes button.on {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}
.modes button.on b { color: var(--accent); }

/* ---- 二人対戦 ---- */
:root {
  --p1: #ffb02e;
  --p2: #56b8ff;
}
.p1ink { color: var(--p1); }
.p2ink { color: var(--p2); }

.vsHud .stat.p1 .k, .vsHud .stat.p1 .v { color: var(--p1); }
.vsHud .stat.p2 .k, .vsHud .stat.p2 .v { color: var(--p2); }
.vsHud .stat .v { font-size: 22px; }

.choices.side { margin-bottom: 12px; }
.choices.p2side .choice { border-color: rgba(86, 184, 255, .45); }
.choices.p2side .choice .key { color: var(--p2); background: rgba(86, 184, 255, .14); }
#choices.vsMine .choice { border-color: rgba(255, 176, 46, .45); }
#choices.vsMine .choice .key { color: var(--p1); background: rgba(255, 176, 46, .16); }

.choice.locked {
  opacity: .35;
  text-decoration: line-through;
}
.choice.tookit {
  border-color: var(--accent);
  background: linear-gradient(180deg, #3b3016, #2a2210);
  opacity: 1;
}

.vsNote {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.feedback .who { font-weight: 800; }
.feedback .who.p1 { color: var(--p1); }
.feedback .who.p2 { color: var(--p2); }

.winner { margin: 0 0 10px; font-size: 24px; font-weight: 800; }
.vsBoard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 6px;
}
.vsCol {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 14px 8px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--card);
}
.vsCol .who { font-size: 12px; letter-spacing: .12em; }
.vsCol .pt { font-size: 34px; font-weight: 800; line-height: 1.2; font-variant-numeric: tabular-nums; }
.vsCol .sub { font-size: 12px; color: var(--muted); }
.vsCol.p1 { border-color: rgba(255, 176, 46, .5); }
.vsCol.p1 .who, .vsCol.p1 .pt { color: var(--p1); }
.vsCol.p2 { border-color: rgba(86, 184, 255, .5); }
.vsCol.p2 .who, .vsCol.p2 .pt { color: var(--p2); }

@media (max-width: 420px) {
  .choices.side .choice { padding: 10px 11px; font-size: 13.5px; }
}

.vsHud { gap: 14px; }
.vsHud .stat.vs .v { color: var(--muted); font-size: 14px; font-weight: 600; }