:root{
  --bg:#f5f4f0; --surface:#fbfbf9; --panel:#ffffff; --panel-soft:#f7f6f2;
  --ink:#1c1c1a; --ink-hover:#3a3935; --ink-2:#55534d; --sub:#7a776f; --muted:#8a877f;
  --line:#e3e1db; --line-2:#dcdad3; --line-3:#efeee9; --hover:#efeee9; --soft:#f3f2ee; --track:#ebe9e3;
  --accent:#5b4ee0; /* 밤하늘 라벤더 */
  --accent-soft:rgba(91,78,224,.1);
  /* 하늘 패널은 테마와 상관없이 밤 */
  --night-1:#0b0f2e; --night-2:#1a1850; --night-3:#3b2a6e;
  --star:#fff7d6; --sky-ink:#f1efff; --sky-sub:#b9b5e6; --sky-line:rgba(255,255,255,.14); --glow:#ffd98a; --lav:#b8afff;
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.app{min-height:calc(100vh - 48px);display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:var(--surface);flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:14px;min-width:0;flex-wrap:wrap}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em;margin:0}
.actions{display:flex;gap:8px}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer;white-space:nowrap}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
button:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.select{height:38px;padding:0 10px;border:1px solid var(--line-2);border-radius:8px;background:var(--surface);color:var(--ink);font:inherit;font-size:13.5px;width:100%}

.wrap{width:100%;max-width:1120px;margin:0 auto;padding:24px 28px 48px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}

/* 밤하늘 */
.sky{grid-column:1/-1;position:relative;overflow:hidden;border-radius:24px;color:var(--sky-ink);
  background:radial-gradient(120% 90% at 85% 0%,rgba(255,217,138,.16),transparent 45%),linear-gradient(170deg,var(--night-1) 0%,var(--night-2) 55%,var(--night-3) 100%);
  padding:26px 28px 22px;min-height:420px}
.stars{position:absolute;inset:0;pointer-events:none}
.stars i{position:absolute;border-radius:50%;background:var(--star);opacity:.75;animation:tw 3.6s ease-in-out infinite}
@keyframes tw{0%,100%{opacity:.85}50%{opacity:.25}}
.moon{position:absolute;right:42px;top:30px;width:74px;height:74px;border-radius:50%;box-shadow:-14px 8px 0 0 var(--glow);transform:rotate(-12deg);filter:drop-shadow(0 0 18px rgba(255,217,138,.35));pointer-events:none}
.sky::after{content:"";position:absolute;left:0;right:0;bottom:0;height:46px;background:linear-gradient(180deg,transparent,rgba(5,6,24,.55));pointer-events:none}
.sky-in{position:relative;z-index:1;display:flex;flex-direction:column;gap:16px}

.mode{display:inline-flex;gap:6px;padding:5px;border-radius:16px;background:rgba(255,255,255,.07);border:1px solid var(--sky-line);align-self:flex-start;max-width:calc(100% - 110px)}
.mode-btn{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:9px 16px;border:none;border-radius:12px;background:transparent;color:var(--sky-sub);cursor:pointer;font-size:14px;font-weight:700;text-align:left}
.mode-btn span{font-size:11.5px;font-weight:400;opacity:.85}
.mode-btn[aria-pressed="true"]{background:var(--sky-ink);color:var(--night-2)}
.mode-btn:focus-visible{outline-color:var(--glow)}

.ask{display:flex;flex-direction:column;gap:8px}
.ask-q{font-size:14px;color:var(--sky-sub)}
.time-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.time-input{height:62px;padding:0 16px;border-radius:14px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);color:var(--sky-ink);font-family:var(--mono);font-size:32px;font-weight:700;letter-spacing:-.01em;color-scheme:dark;min-width:0;max-width:100%}
.time-input:focus{outline:2px solid var(--glow);outline-offset:2px}
.quick{display:flex;gap:6px;flex-wrap:wrap}
.quick button{height:32px;padding:0 12px;border-radius:999px;border:1px solid var(--sky-line);background:transparent;color:var(--sky-sub);font-family:var(--mono);font-size:12.5px;cursor:pointer}
.quick button:hover,.quick button[aria-pressed="true"]{border-color:var(--glow);color:var(--glow)}
.quick button:focus-visible{outline-color:var(--glow)}
.now-toggle{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--sky-sub);cursor:pointer}
.now-toggle input{width:17px;height:17px;margin:0;accent-color:var(--glow)}

.answer{margin:2px 0 0;font-size:15px;line-height:1.6;color:var(--sky-sub);min-height:24px}
.answer b{color:var(--sky-ink);font-family:var(--mono);font-size:17px}
.options{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.opt{position:relative;display:flex;flex-direction:column;gap:4px;width:100%;padding:14px 14px 12px;border-radius:16px;border:1px solid var(--sky-line);background:rgba(255,255,255,.05);color:var(--sky-ink);cursor:pointer;text-align:left;transition:transform .2s,border-color .2s,background .2s;animation:rise .4s ease both}
.opt:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.3)}
.opt:focus-visible{outline:2px solid var(--glow);outline-offset:2px}
.opt-ap{font-size:12px;color:var(--sky-sub)}
.opt-t{font-family:var(--mono);font-size:30px;font-weight:700;letter-spacing:-.02em;line-height:1.05}
.opt-day{font-family:var(--font);font-size:11px;font-weight:500;color:var(--sky-sub);margin-left:4px;letter-spacing:0;vertical-align:middle}
.opt-m{font-size:12.5px;color:var(--sky-sub);display:flex;gap:6px;flex-wrap:wrap}
.opt-m b{color:var(--sky-ink);font-weight:500}
.opt-badge{position:absolute;right:10px;top:10px;font-size:10.5px;font-weight:700;padding:3px 7px;border-radius:999px;background:var(--glow);color:#2a2040;letter-spacing:.02em}
.opt.is-rec{border-color:rgba(255,217,138,.55);background:linear-gradient(160deg,rgba(255,217,138,.16),rgba(255,255,255,.04))}
.opt[aria-pressed="true"]{background:var(--sky-ink);color:var(--night-2);border-color:var(--sky-ink)}
.opt[aria-pressed="true"] .opt-ap,.opt[aria-pressed="true"] .opt-m,.opt[aria-pressed="true"] .opt-day{color:#4a4580}
.opt[aria-pressed="true"] .opt-m b{color:var(--night-2)}
.options li:nth-child(2) .opt{animation-delay:.04s}
.options li:nth-child(3) .opt{animation-delay:.08s}
.options li:nth-child(4) .opt{animation-delay:.12s}
.options li:nth-child(5) .opt{animation-delay:.16s}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.legend{margin:0;display:flex;align-items:center;gap:8px;font-size:12px;color:var(--sky-sub)}
.lg-rec{width:12px;height:12px;border-radius:4px;background:var(--glow);flex:none}

/* 타임라인 */
.timeline-card{grid-column:1/-1;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:16px 18px 14px;display:flex;flex-direction:column;gap:8px;min-width:0}
.tl-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap}
.tl-sum{font-size:13px;color:var(--ink-2)}
.tl-sum b{font-family:var(--mono);color:var(--accent)}
#hypno{width:100%;height:auto;display:block}
#hypno .band{fill:var(--soft)}
#hypno .band-t{fill:var(--muted);font-size:10px;font-family:var(--font)}
#hypno .wave{fill:none;stroke:var(--accent);stroke-width:2.4;stroke-linejoin:round;stroke-linecap:round}
#hypno .wave-fill{fill:var(--accent-soft)}
#hypno .lat{fill:none;stroke:var(--muted);stroke-width:2;stroke-dasharray:3 4}
#hypno .cyc{stroke:var(--line-2);stroke-width:1;stroke-dasharray:2 3}
#hypno .cyc-t{fill:var(--sub);font-family:var(--mono);font-size:10px}
#hypno .tick{fill:var(--muted);font-family:var(--mono);font-size:10px}
#hypno .tick-l{stroke:var(--line-2);stroke-width:1}
#hypno .end{fill:var(--accent);font-family:var(--mono);font-size:11px;font-weight:700}
.tl-note{margin:0;font-size:12px;color:var(--muted);line-height:1.6}

/* 설정 */
.settings{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.set{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:8px;min-width:0}
.set-top{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:14px;font-weight:700}
.set input[type="range"]{width:100%;accent-color:var(--accent);margin:4px 0 0}
.set .tb-presets{margin-top:0}
.set-desc{margin:0;font-size:12px;line-height:1.6;color:var(--muted)}
.range-in{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2)}
.range-in label{width:72px}
.num-input{height:36px;width:100%;padding:0 10px;border:1px solid var(--line-2);border-radius:8px;background:var(--surface);color:var(--ink);font-family:var(--mono);font-size:14px;text-align:center}
.num-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}

.caution{grid-column:1/-1;font-size:12.5px;line-height:1.7;color:var(--ink-2);background:var(--panel-soft);border:1px dashed var(--line-2);border-radius:14px;padding:14px 16px}
.caution b{color:var(--ink)}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50}
.toast.is-show{opacity:1;transform:translate(-50%,0)}

@media (max-width:860px){
  .settings{grid-template-columns:1fr 1fr}
  .settings .set:last-child{grid-column:1/-1}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .wrap{padding:16px 16px 40px;gap:14px;grid-template-columns:minmax(0,1fr)}
  .sky{padding:18px 14px 18px;border-radius:18px;min-height:0}
  .moon{width:44px;height:44px;right:16px;top:122px;box-shadow:-9px 5px 0 0 var(--glow)}
  .mode{max-width:100%}
  .mode-btn{padding:8px 11px;font-size:13px}
  .mode-btn span{font-size:11px}
  .time-input{font-size:28px;height:56px}
  .options{grid-template-columns:1fr 1fr;gap:8px}
  .opt{padding:12px 11px 10px}
  .opt-t{font-size:25px}
  .settings{grid-template-columns:minmax(0,1fr)}
  .timeline-card{padding:14px 12px}
}
@media (max-width:380px){
  .mode{max-width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* 다크 모드 (인쇄는 라이트 그대로) */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#11121a; --surface:#171822; --panel:#1c1d28; --panel-soft:#21222e;
    --ink:#ebeaf5; --ink-hover:#ffffff; --ink-2:#c6c4d8; --sub:#a09eb6; --muted:#8a88a0;
    --line:#2b2b3a; --line-2:#373748; --line-3:#242432; --hover:#272836; --soft:#232433; --track:#323345;
    --accent:#a99fff; --accent-soft:rgba(169,159,255,.16);
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .toast{color:var(--bg)}
  :root[data-theme="dark"] .btn--solid{background:var(--accent)}
  :root[data-theme="dark"] .btn--solid:hover{background:var(--ink)}
  :root[data-theme="dark"] .tb-presets button[aria-pressed="true"]{color:var(--bg)}
  :root[data-theme="dark"] .mode-btn[aria-pressed="true"],:root[data-theme="dark"] .opt[aria-pressed="true"]{background:var(--lav);border-color:var(--lav)}
  :root[data-theme="dark"] .sky{box-shadow:0 0 0 1px var(--line)}
}