: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:#1597c4; /* 물빛 */
  --accent-soft:#e1f3fa;
  --water:#3db7e4;
  --stretch:#f08a3c;
  --stretch-soft:#fdeee2;
  --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;word-break:keep-all}
button,select{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.app{min-height:100vh;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}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.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:disabled{opacity:.4;cursor:default}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.wrap{width:100%;max-width:1100px;margin:0 auto;padding:24px 28px 56px;display:flex;flex-direction:column;gap:22px}
.perm{margin:0;padding:12px 16px;border-radius:14px;background:var(--accent-soft);color:#0c5d7a;font-size:13px;line-height:1.6}
.sec-title{margin:0;font-size:17px}

/* ---------- 타이머 ---------- */
.timers{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.timer{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:22px;display:flex;flex-direction:column;gap:16px;transition:box-shadow .3s,border-color .3s}
.timer--water{--c:var(--water);--cs:var(--accent-soft)}
.timer--stretch{--c:var(--stretch);--cs:var(--stretch-soft)}
.timer.is-on{border-color:var(--c);box-shadow:0 16px 36px -18px var(--c)}
.timer-head{display:flex;align-items:center;gap:12px}
.timer-ic{width:44px;height:44px;border-radius:14px;background:var(--cs);display:grid;place-items:center;font-size:22px}
.timer-title{margin:0;font-size:17px}
.timer-sub{margin:2px 0 0;font-size:12.5px;color:var(--sub)}
.ring-wrap{position:relative;width:190px;height:190px;margin:0 auto}
.ring{width:100%;height:100%;transform:rotate(-90deg)}
.ring-track{fill:none;stroke:var(--track);stroke-width:9}
.ring-bar{fill:none;stroke:var(--c);stroke-width:9;stroke-linecap:round;transition:stroke-dashoffset 1s linear}
.ring-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.ring-text b{font-family:var(--mono);font-size:36px;font-weight:500;letter-spacing:-.03em}
.ring-text span{font-size:11.5px;color:var(--muted)}
.timer-ctrl{display:flex;gap:8px}
.sel{flex:1;min-width:0;height:42px;border:1px solid var(--line-2);border-radius:12px;background:var(--surface);padding:0 10px;font-size:14px;cursor:pointer}
.sel--sm{flex:none;height:34px;font-size:13px}
.btn--go{height:42px;min-width:92px;background:var(--c);color:#fff;border:none;font-weight:700}
.btn--go:hover{background:var(--c);filter:brightness(.95)}
.btn--go.is-on{background:var(--soft);color:var(--ink)}

/* ---------- 물 기록 ---------- */
.water{background:linear-gradient(180deg,#fff,var(--accent-soft));border:1px solid var(--line);border-radius:24px;padding:24px}
.water-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}
.water-date{margin:4px 0 0;font-size:13px;color:var(--sub)}
.goal{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--sub)}
.glasses{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}
.glass{position:relative;width:40px;height:54px;border:2.5px solid #9ccfe2;border-top-width:0;border-radius:3px 3px 10px 10px;overflow:hidden;background:rgba(255,255,255,.6)}
.glass::before{content:"";position:absolute;left:-3px;right:-3px;top:0;height:2.5px;background:#9ccfe2}
.glass i{position:absolute;left:0;right:0;bottom:0;height:0;background:linear-gradient(180deg,#6fd0f2,var(--accent));transition:height .5s cubic-bezier(.2,.8,.2,1)}
.glass.is-full{border-color:var(--accent)}
.glass.is-full::before{background:var(--accent)}
.glass.is-full i{height:82%}
.glass.is-extra{border-style:dashed}
.glass.is-pop{animation:pop .45s cubic-bezier(.3,1.6,.5,1)}
@keyframes pop{0%{transform:scale(.8)}100%{transform:none}}
.water-ctrl{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.water-count{flex:1;text-align:center;font-size:15px;color:var(--sub);min-width:140px}
.water-count b{font-family:var(--mono);font-size:32px;color:var(--accent);font-weight:500}
.water-count small{display:block;font-size:12px;color:var(--muted)}
.btn--water{height:44px;padding:0 20px;background:var(--accent);color:#fff;border:none;font-weight:700;font-size:14px}
.btn--water:hover{background:#0f84ad}
.week{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin-top:22px;padding-top:18px;border-top:1px dashed #b9dceb}
.day{display:flex;flex-direction:column;align-items:center;gap:4px;font-size:11px;color:var(--sub)}
.day-bar{width:100%;max-width:34px;height:60px;background:rgba(255,255,255,.7);border-radius:8px;display:flex;align-items:flex-end;overflow:hidden}
.day-bar i{display:block;width:100%;background:#9ccfe2;border-radius:8px 8px 0 0}
.day.is-goal .day-bar i{background:var(--accent)}
.day b{font-family:var(--mono);font-size:12px;color:var(--ink-2);font-weight:500}
.day.is-today small{color:var(--accent);font-weight:700}

/* ---------- 스트레칭 ---------- */
.stretch{display:flex;flex-direction:column;gap:14px}
.stretch-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.stretch-nav{display:flex;align-items:center;gap:8px}
.stretch-nav .btn{width:36px;padding:0}
.moves{position:relative;display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 2px 14px;scrollbar-width:thin}
.move{flex:0 0 300px;scroll-snap-align:start;display:flex;flex-direction:column;gap:12px;background:var(--panel);border:1.5px solid var(--line);border-radius:20px;padding:20px;cursor:pointer;transition:border-color .2s,transform .2s}
.move.is-active{border-color:var(--stretch);background:linear-gradient(180deg,var(--stretch-soft),#fff 60%)}
.move-ic{font-size:40px;line-height:1}
.move h3{margin:6px 0 8px;font-size:17px}
.move ol{margin:0;padding-left:18px;font-size:13.5px;line-height:1.65;color:var(--ink-2)}
.note{margin:0;font-size:12px;color:var(--muted)}

/* ---------- 화면 알림 ---------- */
.alert{position:fixed;inset:0;z-index:100;display:flex;align-items:flex-start;justify-content:center;padding:80px 16px 16px;background:rgba(28,28,26,.35);animation:fade .2s}
.alert-card{width:100%;max-width:380px;background:#fff;border-radius:24px;padding:28px 24px 22px;text-align:center;box-shadow:0 30px 60px rgba(0,0,0,.25);animation:drop .45s cubic-bezier(.3,1.4,.5,1)}
.alert-ic{font-size:52px;display:block;animation:wiggle 1s ease-in-out 2}
.alert-title{margin:10px 0 6px;font-size:21px}
.alert-msg{margin:0 0 20px;font-size:14px;color:var(--sub);line-height:1.6}
.alert-btns{display:flex;gap:8px;justify-content:center}
.alert-btns .btn{height:42px;padding:0 18px}
.alert--water .btn--solid{background:var(--accent)}
.alert--stretch .btn--solid{background:var(--stretch)}
@keyframes fade{from{opacity:0}}
@keyframes drop{from{transform:translateY(-30px);opacity:0}}
@keyframes wiggle{25%{transform:rotate(-12deg)}75%{transform:rotate(12deg)}}

@media (max-width:760px){ .timers{grid-template-columns:minmax(0,1fr)} }
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .wrap{padding:16px 16px 40px;gap:16px}
  .timer{padding:18px 16px}
  .ring-wrap{width:160px;height:160px}
  .ring-text b{font-size:30px}
  .water{padding:20px 16px}
  .glasses{gap:8px}
  .glass{width:32px;height:44px}
  .water-ctrl .btn{flex:1}
  .water-count{order:-1;flex-basis:100%}
  .move{flex-basis:82%}
}
@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:#111518; --surface:#161b1e; --panel:#1b2023; --panel-soft:#20262a;
    --ink:#e6ecef; --ink-hover:#ffffff; --ink-2:#c2cbcf; --sub:#97a2a8; --muted:#838e94;
    --line:#283035; --line-2:#333c42; --line-3:#212a2e; --hover:#252d32; --soft:#222a2f; --track:#2f383d;
    --accent:#4cc3ec; --accent-soft:rgba(76,195,236,.14);
    --water:#4cc3ec; --stretch:#f79a52; --stretch-soft:rgba(247,154,82,.14);
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .btn--go,:root[data-theme="dark"] .btn--water{color:var(--bg)}
  :root[data-theme="dark"] .btn--solid{background:var(--accent)}
  :root[data-theme="dark"] .btn--solid:hover{background:#7ad3f2}
  :root[data-theme="dark"] .btn--go.is-on{color:var(--ink)}
  :root[data-theme="dark"] .btn--water:hover{background:#7ad3f2}
  :root[data-theme="dark"] .perm{color:#a5ddf1}
  :root[data-theme="dark"] .sel{color:var(--ink)}
  :root[data-theme="dark"] .timer.is-on{box-shadow:0 16px 36px -22px var(--c)}
  :root[data-theme="dark"] .water{background:linear-gradient(180deg,var(--panel),#15262e)}
  :root[data-theme="dark"] .glass{border-color:#3b6b7e;background:rgba(255,255,255,.03)}
  :root[data-theme="dark"] .glass::before{background:#3b6b7e}
  :root[data-theme="dark"] .glass.is-full{border-color:var(--accent)}
  :root[data-theme="dark"] .glass.is-full::before{background:var(--accent)}
  :root[data-theme="dark"] .week{border-top-color:#2c4955}
  :root[data-theme="dark"] .day-bar{background:rgba(255,255,255,.05)}
  :root[data-theme="dark"] .day-bar i{background:#3b6b7e}
  :root[data-theme="dark"] .day.is-goal .day-bar i{background:var(--accent)}
  :root[data-theme="dark"] .move.is-active{background:linear-gradient(180deg,var(--stretch-soft),var(--panel) 60%)}
  :root[data-theme="dark"] .alert{background:rgba(0,0,0,.55)}
  :root[data-theme="dark"] .alert-card{background:var(--panel);border:1px solid var(--line-2);box-shadow:0 30px 60px rgba(0,0,0,.5)}
}