:root{--bg:#F5F6F3;--surface:#FFFFFF;--ink:#1D2B3A;--muted:#5B6773;--line:#DCE1DD;--accent:#1F7A6D;--accent-ink:#FFFFFF;--accent-soft:#E2F0EC;--wrong:#B8432D;--wrong-soft:#F7E6E1;--warn:#C08A1E}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){color-scheme:dark;--bg:#12181E;--surface:#1A222A;--ink:#E6EBEF;--muted:#9AA6B1;--line:#2C3742;--accent:#5CC2AE;--accent-ink:#0E1A17;--accent-soft:#17332E;--wrong:#E9826C;--wrong-soft:#3A221D;--warn:#E2B452}}
:root[data-theme="dark"]{color-scheme:dark;--bg:#12181E;--surface:#1A222A;--ink:#E6EBEF;--muted:#9AA6B1;--line:#2C3742;--accent:#5CC2AE;--accent-ink:#0E1A17;--accent-soft:#17332E;--wrong:#E9826C;--wrong-soft:#3A221D;--warn:#E2B452}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 "Noto Sans KR",system-ui,sans-serif}
.app{max-width:560px;margin:0 auto;padding-inline:16px;padding-block:calc(18px + env(safe-area-inset-top,0px)) 48px;display:flex;flex-direction:column;gap:16px}
.top{display:flex;align-items:center;gap:10px}
.brand{font:700 22px/1.2 "Gowun Batang",serif;margin:0}
.grade{font-size:12px;border:1px solid var(--line);border-radius:999px;padding:2px 10px;color:var(--muted)}
.top .sp{flex:1}
button{font:inherit;color:inherit}
.link{background:none;border:none;color:var(--accent);font-weight:500;cursor:pointer;padding:6px 0}
h2{font-size:17px;margin:0}
.sub{color:var(--muted);font-size:13px;margin:0}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.subj{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:4px}
.subj:hover{border-color:var(--accent)}
.subj b{font-size:18px}.subj span{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.seg{display:flex;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:4px;gap:4px}
.seg button{flex:1;border:none;background:none;border-radius:7px;padding:9px 4px;font-weight:500;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.seg button:disabled{opacity:.45;cursor:not-allowed}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:10px}
.units{display:flex;flex-direction:column;gap:2px;max-height:46vh;overflow:auto}
.units label{display:flex;gap:10px;align-items:flex-start;padding:7px 4px;border-radius:6px;cursor:pointer}
.units label:hover{background:var(--bg)}
.units input{margin-top:4px;accent-color:var(--accent)}
.units small{color:var(--muted);font-variant-numeric:tabular-nums;margin-left:auto;white-space:nowrap}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.pill{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:5px 12px;font-size:13px;cursor:pointer}
.pill[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);font-weight:700}
.primary{background:var(--accent);color:var(--accent-ink);border:none;border-radius:10px;padding:14px;font-weight:700;font-size:16px;cursor:pointer;width:100%}
.primary:disabled{opacity:.5;cursor:not-allowed}
.ghost{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px;font-weight:500;cursor:pointer;width:100%}
.prog{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.bar{flex:1;height:6px;background:var(--line);border-radius:3px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);transition:width .3s}
.timer{height:4px;background:var(--line);border-radius:2px;overflow:hidden}
.timer i{display:block;height:100%;background:var(--warn);width:100%}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px;display:flex;flex-direction:column;gap:14px}
.qtag{font-size:12px;color:var(--muted)}
.stem{font-size:17px;font-weight:500;margin:0;white-space:pre-line;word-break:keep-all;line-height:1.6}
.opts{display:flex;flex-direction:column;gap:8px}
.opt{display:flex;gap:10px;align-items:flex-start;text-align:left;line-height:1.5;word-break:keep-all;border:1px solid var(--line);background:transparent;border-radius:9px;padding:12px;cursor:pointer}
.opt .n{color:var(--muted);min-width:1.4em}
.opt:hover:not(:disabled){border-color:var(--accent)}
.opt.right{background:var(--accent-soft);border-color:var(--accent)}
.opt.wrong{background:var(--wrong-soft);border-color:var(--wrong)}
.ox{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.ox button{font:700 44px/1 "Gowun Batang",serif;padding:22px 0;border-radius:12px;border:1px solid var(--line);background:transparent;cursor:pointer}
.ox button.right{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.ox button.wrong{background:var(--wrong-soft);border-color:var(--wrong);color:var(--wrong)}
.fb{border-top:1px dashed var(--line);padding-top:12px;display:flex;flex-direction:column;gap:6px}
.foot b.ok{color:var(--accent)}.foot b.no{color:var(--wrong)}
.fb p{margin:0}
.big{font:700 44px/1 "Gowun Batang",serif;font-variant-numeric:tabular-nums}
.wl{display:flex;flex-direction:column;gap:8px}
.wl div{border-left:3px solid var(--wrong);padding:4px 0 4px 10px;font-size:14px}
.wl small{color:var(--muted)}
html,body{height:100%}
.app.quiz{height:100%;padding-block:10px;gap:10px;overflow:hidden}
.app.quiz .card{flex:1;min-height:0;gap:12px;padding:16px}
.app.quiz .qa{display:flex;flex-direction:column;gap:14px;min-height:0;overflow:auto;flex:1}
.app.quiz .stem{font-size:clamp(15px,2.3vh,19px)}
.app.quiz .opt{padding:clamp(8px,1.4vh,13px) 12px}
.app.quiz .opts{gap:clamp(6px,1vh,9px)}
.app.quiz .ox button{padding:clamp(14px,4vh,34px) 0;font-size:clamp(34px,6vh,56px)}
.foot{display:flex;justify-content:center}
.foot .hint{color:var(--muted);font-size:13px}
.sheet-bg{position:fixed;inset:0;background:rgba(10,16,22,.45);display:flex;align-items:flex-end;justify-content:center;z-index:10;animation:fade .15s ease-out}
.sheet{background:var(--surface);color:var(--ink);width:100%;max-width:680px;max-height:78%;overflow:auto;border-radius:18px 18px 0 0;padding:22px 20px calc(20px + env(safe-area-inset-bottom,0px));display:flex;flex-direction:column;gap:14px;box-shadow:0 -8px 30px rgba(0,0,0,.18);animation:up .2s ease-out}
.sheet .verdict{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700}
.sheet .verdict i{font-style:normal;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-size:18px}
.sheet .ok{color:var(--accent)}.sheet .ok i{background:var(--accent-soft)}
.sheet .no{color:var(--wrong)}.sheet .no i{background:var(--wrong-soft)}
.sheet .ans{background:var(--bg);border-radius:10px;padding:12px 14px;font-size:16px}
.sheet .ans span{color:var(--muted);font-size:13px;display:block}
.sheet .exp{font-size:16px;line-height:1.75;margin:0;word-break:keep-all}
@keyframes up{from{transform:translateY(24px);opacity:.6}}
@keyframes fade{from{opacity:0}}
@media (min-width:700px){.sheet-bg{align-items:center}.sheet{border-radius:18px;max-height:70%}}
@media (prefers-reduced-motion:reduce){.sheet,.sheet-bg{animation:none}}
@media (min-width:700px){.app{max-width:680px}}
.ad{border:1px dashed var(--line);border-radius:10px;padding:14px;text-align:center;font-size:12px;color:var(--muted)}
.note{font-size:12px;color:var(--muted);text-align:center}
button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion:reduce){.bar i{transition:none}}
.acct{display:flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:4px 12px;font-size:13px;cursor:pointer;max-width:9em;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.acct.on{border-color:var(--accent);color:var(--accent)}
.sheet h3{margin:0;font-size:19px}
.login{display:flex;align-items:center;justify-content:center;gap:10px;border:none;border-radius:10px;padding:14px;font-weight:700;font-size:16px;cursor:pointer;width:100%}
.login.kakao{background:#FEE500;color:#191600}
.login.google{background:#fff;color:#1F1F1F;border:1px solid #DADCE0}
.login svg{width:20px;height:20px;flex:none}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:2px}
.stat b{font-size:22px;font-variant-numeric:tabular-nums}
.stat span{font-size:12px;color:var(--muted)}
.week{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;align-items:end;height:90px}
.week div{display:flex;flex-direction:column;align-items:center;gap:4px;height:100%;justify-content:flex-end;font-size:11px;color:var(--muted)}
.week i{display:block;width:100%;max-width:28px;background:var(--accent);border-radius:4px 4px 0 0;min-height:2px}
.srow{display:flex;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px;font-variant-numeric:tabular-nums}
.srow:last-child{border-bottom:none}
.syncnote{font-size:12px;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:999px;font-size:14px;z-index:20;max-width:calc(100% - 32px)}
.opts-panel{gap:12px}
.opts-panel .lbl{min-width:4.5em}
.chk{display:flex;gap:8px;align-items:center;font-weight:500;cursor:pointer;flex-wrap:wrap}
.chk input{accent-color:var(--accent)}
.chk small{color:var(--muted);font-weight:400;font-size:12px}
.opts-panel .pill{padding:5px 11px}
#ncount{margin-top:-4px}
@media (max-width:420px){.opts-panel .row{row-gap:6px}.opts-panel .lbl{flex-basis:100%}}
.note a,.syncnote a{color:var(--muted)}