/* ============================================================
   TTA 디자인 시스템 v0.1
   - 원칙: 소리·촉감이 주인공 → 화면은 어둡고 조용하게, 정보는 꼭 필요한 것만
   - 글꼴 1종(시스템 고딕), 크기 5단계, 강조색 1개
   ============================================================ */
:root {
  --bg: #0F0E13;
  --surface: #18171E;
  --surface-2: #211F29;
  --line: rgba(255, 255, 255, .08);
  --text: #F3F1F7;
  --muted: #9C99A8;
  --accent: #FF8A6B;          /* 따뜻한 산호색 — 버튼·현재 위치·순위 */
  --accent-ink: #1A0F0C;
  --ok: #6FD8B3;
  --radius: 18px;
  --radius-sm: 12px;
  --fs-xs: 12px; --fs-sm: 14px; --fs-md: 16px; --fs-lg: 20px; --fs-xl: clamp(34px, 8vw, 60px);
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 var(--fs-md)/1.55 var(--font); letter-spacing: -.01em; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.2; letter-spacing: -.025em; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }
.sm { font-size: var(--fs-sm); }
.m { display: none; }
@media (max-width: 600px) { .m { display: inline; } }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* 상단 */
.top { position: sticky; top: 0; z-index: 10; background: rgba(15, 14, 19, .82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 19px; letter-spacing: .02em; }
.logo.sm { font-size: 15px; }
.logo-dot { width: 12px; height: 12px; border-radius: 50%; background: radial-gradient(circle at 35% 35%, #fff 0 12%, var(--accent) 45%, #c4513a); box-shadow: 0 0 14px rgba(255, 138, 107, .6); }
.nav { display: flex; gap: 4px; }
.nav a { font-size: 13px; font-weight: 700; letter-spacing: .06em; color: var(--muted); padding: 8px 10px; border-radius: 10px; }
.nav a:hover { color: var(--text); }
.nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }

/* 첫 화면 */
.hero { padding: 64px 20px 28px; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: var(--fs-sm); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.hero h1 { font-size: var(--fs-xl); font-weight: 800; }
.lead { margin: 16px 0 0; font-size: clamp(17px, 2.6vw, 21px); color: #D7D4DE; }
.hint { margin: 18px 0 0; color: var(--muted); font-size: var(--fs-sm); }

.section { padding: 28px 20px 40px; }
.section-sm { margin-top: 36px; }
.section-sm h2 { font-size: var(--fs-lg); margin-bottom: 14px; }
.sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.sec-head h1 { font-size: 30px; font-weight: 800; letter-spacing: .02em; }
.sec-head h2 { font-size: var(--fs-lg); font-weight: 800; letter-spacing: .02em; }
.more { color: var(--muted); font-size: var(--fs-sm); font-weight: 600; }
.more:hover { color: var(--text); }

/* 시뮬레이터 카드 */
.sim-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 760px) { .sim-grid { grid-template-columns: 1fr; } }
.sim-card { position: relative; display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: transform .25s cubic-bezier(.2, .8, .2, 1), border-color .25s; }
.sim-card:hover { transform: translateY(-3px); border-color: rgba(255, 255, 255, .16); }
.sim-card:active { transform: scale(.985); }
.sim-meta { display: flex; flex-direction: column; gap: 4px; padding: 16px 18px 18px; }
.sim-meta strong { font-size: var(--fs-lg); font-weight: 800; }
.sim-meta span { color: var(--muted); font-size: var(--fs-sm); }
.sim-go { position: absolute; right: 18px; bottom: 18px; color: var(--muted); font-size: 18px; }
@media (max-width: 760px) {
  .sim-card { flex-direction: row; align-items: center; }
  .sim-card .art { flex: 0 0 112px; height: 112px; }
  .sim-meta { padding: 14px 40px 14px 16px; }
}

/* 카드 그림 (이미지 없이 CSS 로 — 빠르게) */
.art { position: relative; height: 170px; display: grid; place-items: center; background: radial-gradient(120% 90% at 50% 10%, color-mix(in srgb, var(--tint) 26%, transparent), transparent 70%), var(--surface-2); overflow: hidden; }
.art-keycap { display: flex; gap: 8px; align-items: center; justify-content: center; flex-wrap: wrap; padding: 24px; }
.art-keycap i { width: 42px; height: 42px; border-radius: 9px; background: linear-gradient(180deg, #fbf6ec, #e3d6bf); box-shadow: 0 5px 0 #b7a68a, 0 9px 14px rgba(0, 0, 0, .45), inset 0 -3px 6px rgba(0, 0, 0, .08); }
.art-keycap i:nth-child(2) { background: linear-gradient(180deg, #ffb39e, #f08a6c); box-shadow: 0 5px 0 #b95b43, 0 9px 14px rgba(0, 0, 0, .45); transform: translateY(3px); }
.art-keycap i.wide { width: 142px; }
.art-slime i { width: 70%; height: 62%; border-radius: 48% 52% 46% 54% / 55% 50% 50% 45%; background: radial-gradient(60% 50% at 35% 30%, #fff 0 6%, #ffd0dc 20%, #f39ab6 60%, #c5577d); box-shadow: 0 16px 30px rgba(0, 0, 0, .45), inset -10px -14px 30px rgba(120, 20, 60, .35); }
.art-squishy i { width: 112px; height: 112px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #fff 0 8%, #bfe6fb 25%, #79bfe6 65%, #3e8fc4); box-shadow: 0 18px 30px rgba(0, 0, 0, .5); }
@media (max-width: 760px) { .art-keycap i { width: 26px; height: 26px; border-radius: 6px; } .art-keycap i.wide { width: 86px; } .art-keycap { gap: 5px; padding: 10px; } .art-squishy i { width: 70px; height: 70px; } }

/* 작품 목록 */
.work-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.work-list a { display: flex; align-items: center; gap: 14px; padding: 10px 14px 10px 10px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.work-list a:hover { border-color: rgba(255, 255, 255, .16); }
.work-list .rank { width: 22px; text-align: center; font-weight: 800; color: var(--muted); }
.work-list li:nth-child(-n+3) .rank { color: var(--accent); }
.work-list .thumb { flex: 0 0 52px; height: 52px; border-radius: 10px; overflow: hidden; }
.work-list .thumb .art { height: 52px; padding: 0; }
.work-list .thumb .art i { transform: scale(.4); }
.wl-meta { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.wl-meta strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wl-meta span { color: var(--muted); font-size: var(--fs-sm); }
.likes { color: var(--accent); font-weight: 700; font-size: var(--fs-sm); white-space: nowrap; }

.empty-card { padding: 26px 22px; border: 1px dashed rgba(255, 255, 255, .14); border-radius: var(--radius); background: var(--surface); }
.empty-card strong { display: block; font-size: 17px; margin-bottom: 6px; }
.empty-card p { margin: 0 0 14px; font-size: var(--fs-sm); }
.empty-state { padding: 90px 20px; text-align: center; }
.empty-state h1 { font-size: 28px; margin-bottom: 10px; }
.empty-state .btn { margin-top: 18px; }
.badge { display: inline-block; padding: 5px 10px; border-radius: 99px; background: var(--surface-2); color: var(--muted); font-size: var(--fs-xs); font-weight: 700; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 20px; border-radius: 99px; border: 1px solid var(--line); background: var(--surface-2); color: var(--text); font: 700 15px var(--font); cursor: pointer; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }

.seg { display: inline-flex; padding: 3px; border-radius: 99px; background: var(--surface); border: 1px solid var(--line); }
.seg a { padding: 6px 14px; border-radius: 99px; font-size: var(--fs-sm); font-weight: 700; color: var(--muted); }
.seg a[aria-selected="true"] { background: var(--surface-2); color: var(--text); }

.arena-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 760px) { .arena-grid { grid-template-columns: 1fr; } }
.panel { padding: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.panel .work-list a { background: var(--surface-2); }
.panel-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 12px; }
.panel-head h2 { font-size: 17px; }
.rules { margin-top: 28px; padding: 16px 18px; background: var(--surface); border-radius: var(--radius-sm); border: 1px solid var(--line); }
.rules summary { cursor: pointer; font-weight: 700; }
.rules ul { margin: 12px 0 0; padding-left: 18px; color: #CFCBD8; font-size: var(--fs-sm); }

.foot { border-top: 1px solid var(--line); margin-top: 40px; }
.foot-in { display: flex; gap: 12px; align-items: center; justify-content: space-between; padding: 22px 20px 34px; font-size: var(--fs-sm); flex-wrap: wrap; }

/* ============================================================
   플레이어 (시뮬레이터 화면) — 화면 전체를 조작 영역으로
   ============================================================ */
body.play { overflow: hidden; overscroll-behavior: none; touch-action: none; }
.player { position: fixed; inset: 0; display: grid; grid-template-rows: auto 1fr auto; background: radial-gradient(120% 80% at 50% 0%, #1d1b25, var(--bg) 70%); user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.p-top { display: flex; align-items: center; gap: 8px; padding: calc(env(safe-area-inset-top) + 8px) 12px 8px; }
.p-title { flex: 1; font-size: 17px; font-weight: 800; }
.p-btn { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: rgba(255, 255, 255, .04); color: var(--text); font-size: 17px; cursor: pointer; }
.stage { position: relative; overflow: hidden; touch-action: none; }
.p-bottom { display: flex; flex-direction: column; gap: 8px; padding: 10px 12px calc(env(safe-area-inset-bottom) + 12px); }
.chips { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; }
.chips > :first-child { margin-left: auto; } .chips > :last-child { margin-right: auto; }
.chips.single { display: none; }
.chips::-webkit-scrollbar { display: none; }
.chips:empty { display: none; }
.chip { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 7px; min-height: 38px; padding: 0 14px; border-radius: 99px; border: 1px solid var(--line); background: rgba(255, 255, 255, .04); color: var(--muted); font: 700 14px var(--font); cursor: pointer; }
.chip[aria-checked="true"] { color: var(--text); border-color: rgba(255, 255, 255, .28); background: rgba(255, 255, 255, .09); }
.chip .sw { width: 16px; height: 16px; border-radius: 50%; background: var(--sw); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .25); }
.player.loading .stage::after { content: "소리 준비 중…"; position: absolute; left: 50%; top: 14px; transform: translateX(-50%); padding: 6px 12px; border-radius: 99px; background: rgba(0, 0, 0, .5); color: var(--muted); font-size: 13px; }
.synthetic-note { display: none; margin: 0; text-align: center; font-size: 11px; color: rgba(255, 255, 255, .3); }
.player.is-synthetic .synthetic-note { display: block; }
.tap-cover { position: absolute; inset: 0; z-index: 5; display: grid; place-items: center; background: rgba(10, 9, 13, .62); backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px); cursor: pointer; transition: opacity .3s; }
.tap-cover.off { opacity: 0; pointer-events: none; }
.tap-in { display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; }
.tap-in strong { font-size: 20px; }
.tap-in span { color: var(--muted); font-size: 14px; }
.tap-ring { width: 74px; height: 74px; border-radius: 50%; border: 2px solid var(--accent); margin-bottom: 10px; animation: ring 1.6s ease-out infinite; }
@keyframes ring { 0% { transform: scale(.85); opacity: 1; } 100% { transform: scale(1.35); opacity: 0; } }
.toast { position: fixed; left: 50%; bottom: 120px; z-index: 20; transform: translate(-50%, 10px); padding: 10px 16px; border-radius: 99px; background: #2A2833; color: var(--text); font-size: 14px; opacity: 0; transition: .2s; pointer-events: none; }
.toast.on { opacity: 1; transform: translate(-50%, 0); }
.dbg { position: fixed; right: 8px; top: 64px; z-index: 30; margin: 0; padding: 8px 10px; background: rgba(0, 0, 0, .7); color: #9f9; font: 11px/1.4 ui-monospace, monospace; border-radius: 8px; pointer-events: none; }
@media (prefers-reduced-motion: reduce) { .tap-ring { animation: none; } .sim-card { transition: none; } }

/* ---------- 키캡 ---------- */
.kb-wrap { position: absolute; inset: 0; display: grid; place-items: center; padding: 16px; }
.kb { --cap: #F3EBDD; --cap-2: #E2D5BE; --side: #B9A98C; --leg: #6E5D45; --plate: #2A2830;
  width: min(100%, 1000px); padding: 14px; border-radius: 22px; background: linear-gradient(180deg, #34313b, #232129); box-shadow: 0 30px 60px rgba(0, 0, 0, .55), inset 0 1px 0 rgba(255, 255, 255, .08); display: flex; flex-direction: column; gap: 8px; }
.kb[data-layout="pad"] { width: min(100%, 420px); gap: 12px; padding: 16px; }
.kb-row { display: flex; gap: 8px; }
.kb[data-layout="pad"] .kb-row { gap: 12px; }
.key { position: relative; min-width: 0; cursor: pointer; touch-action: none; }
/* 줄 높이를 1u(키 하나 너비)로 고정 — 15u 기준 */
.kb[data-layout="full"] .kb-row { aspect-ratio: 15 / 1.02; }
.kb[data-layout="pad"] .kb-row { aspect-ratio: 4 / 1; }
.kb[data-layout="pad"] .kb-row:last-child { aspect-ratio: auto; height: 64px; }
.cap { position: absolute; inset: 0; border-radius: 9px; background: linear-gradient(180deg, var(--cap), var(--cap-2)); box-shadow: 0 6px 0 var(--side), 0 10px 16px rgba(0, 0, 0, .45), inset 0 -4px 7px rgba(0, 0, 0, .07), inset 0 2px 1px rgba(255, 255, 255, .6); transition: transform .045s ease-out, box-shadow .045s ease-out; display: flex; align-items: flex-start; justify-content: flex-start; padding: 8% 10%; }
.kb[data-layout="pad"] .cap { border-radius: 14px; align-items: center; justify-content: center; padding: 0; }
.leg { color: var(--leg); font-weight: 700; font-size: clamp(10px, 1.25vw, 14px); }
.kb[data-layout="pad"] .leg { font-size: 22px; }
.key.down .cap { transform: translateY(5px); box-shadow: 0 1px 0 var(--side), 0 3px 6px rgba(0, 0, 0, .4), inset 0 -2px 5px rgba(0, 0, 0, .1), inset 0 2px 1px rgba(255, 255, 255, .5); transition-duration: .02s; }
.kb-row:first-child .key:first-child .cap, .key[data-code="Enter"] .cap { --cap: #FFB9A3; --cap-2: #F28E6F; --side: #B95B43; --leg: #5A2316; }
.kb.look-ink { --cap: #3A3A42; --cap-2: #2D2D34; --side: #16161A; --leg: #CFCBD8; }
.kb.look-ink .kb-row:first-child .key:first-child .cap, .kb.look-ink .key[data-code="Enter"] .cap { --cap: #FF8A6B; --cap-2: #E66E50; --side: #8E3B27; --leg: #2A0E07; }
.kb.look-pastel { --cap: #FFE1EA; --cap-2: #F8C5D5; --side: #C98CA1; --leg: #8B4A62; }
.kb.look-pastel .key:nth-child(3n) .cap { --cap: #DDF3FF; --cap-2: #BFE3F8; --side: #85AFC9; --leg: #3C6782; }
.kb.look-pastel .key:nth-child(4n) .cap { --cap: #E6FFE9; --cap-2: #C3EDCB; --side: #86B691; --leg: #3C7148; }
.kb.look-jelly { --cap: rgba(190, 225, 255, .55); --cap-2: rgba(140, 195, 245, .45); --side: rgba(80, 140, 200, .7); --leg: #EAF6FF; }
.kb.look-jelly .cap { backdrop-filter: blur(2px); box-shadow: 0 6px 0 var(--side), 0 0 18px rgba(130, 200, 255, .35), inset 0 2px 2px rgba(255, 255, 255, .7); }
.kb.look-jelly .key.down .cap { box-shadow: 0 1px 0 var(--side), 0 0 26px rgba(150, 215, 255, .7), inset 0 2px 2px rgba(255, 255, 255, .7); }
.kb-count { position: absolute; left: 0; right: 0; bottom: 8px; text-align: center; color: rgba(255, 255, 255, .3); font-size: 13px; font-variant-numeric: tabular-nums; pointer-events: none; }

/* ---------- 슬라임·왁뿌볼 ---------- */
.slime-cv, .squishy-cv { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; display: block; }
.play-slime .stage { margin: 0 12px; border-radius: 26px; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06), 0 20px 50px rgba(0, 0, 0, .5); }