:root{--red: #b91c1c;--red-dark: #991b1b;--bg: #fafaf9;--card: #ffffff;--text: #1c1917;--muted: #6b6560;--line: #e7e5e4;--good: #15803d;--good-bg: #dcfce7;--warn: #a16207;--warn-bg: #fef3c7;--bad: #b91c1c;--bad-bg: #fee2e2;--info: #1d4ed8;--info-bg: #dbeafe;--radius: 14px;--tab-h: 64px}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-text-size-adjust:100%}a{color:var(--info)}h1,h2,h3{margin:0 0 .4rem;line-height:1.2}h1{font-size:1.25rem}h2{font-size:1.1rem}h3{font-size:1rem}p{margin:0 0 .6rem}ul{padding-left:1.2rem;margin:0 0 .6rem}button{font:inherit}.app{min-height:100dvh;display:flex;flex-direction:column}.main{flex:1;padding:0 16px calc(var(--tab-h) + 24px + env(safe-area-inset-bottom));max-width:720px;width:100%;margin:0 auto}.app--full .main{padding-bottom:24px}.page{padding:16px;max-width:720px;margin:0 auto}.center{text-align:center;padding-top:40vh}.muted{color:var(--muted)}.small{font-size:.875rem}.error{color:var(--bad)}.header{display:grid;grid-template-columns:44px 1fr 44px;align-items:center;min-height:56px;padding-top:env(safe-area-inset-top)}.header__title{text-align:center;font-size:1.1rem;margin:0}.header__back{font-size:2rem;text-decoration:none;color:var(--text);line-height:1;text-align:center}.header__right{text-align:right}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:14px}.card--hero{background:linear-gradient(135deg,var(--red),var(--red-dark));color:#fff;border:none}.card--hero .muted{color:#fffc}.card--hero a{color:#fff}.card--hero a.btn--light{color:var(--red)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;min-height:48px;padding:0 18px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--text);font-weight:600;cursor:pointer;text-decoration:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background:var(--red);border-color:var(--red);color:#fff}.btn--light{background:#fff;color:var(--red);border-color:#fff}.btn--block{display:flex;width:100%}.btn--ghost{background:transparent;border-color:transparent}.btn--sm{min-height:36px;padding:0 12px;font-size:.9rem}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.row--between{justify-content:space-between}.stack>*+*{margin-top:10px}.badge{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.02em;text-transform:uppercase;padding:2px 8px;border-radius:999px;background:var(--line);color:var(--muted)}.badge--warn{background:var(--warn-bg);color:var(--warn)}.badge--good{background:var(--good-bg);color:var(--good)}.badge--bad{background:var(--bad-bg);color:var(--bad)}.badge--info{background:var(--info-bg);color:var(--info)}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px;text-align:center}.stat__value{font-size:1.5rem;font-weight:700}.stat__label{font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.progress{height:8px;background:var(--line);border-radius:999px;overflow:hidden}.progress__fill{height:100%;background:var(--red);transition:width .2s}.field{display:block;margin-bottom:14px}.field>span{display:block;font-size:.85rem;font-weight:600;margin-bottom:4px}.field input,.field select{width:100%;min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;color:var(--text)}.field input[type=date]{-webkit-appearance:none}.question__stem{font-size:1.1rem;font-weight:600;margin:8px 0 14px}.option{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;padding:12px 14px;margin-bottom:8px;border:2px solid var(--line);border-radius:12px;background:#fff;color:var(--text);cursor:pointer}.option__key{font-weight:700;color:var(--muted);min-width:1.2rem}.option--selected{border-color:var(--red);background:#fff5f5}.option--correct{border-color:var(--good);background:var(--good-bg)}.option--wrong{border-color:var(--bad);background:var(--bad-bg)}.option:disabled{cursor:default}.explain{background:var(--bg);border-left:4px solid var(--line);padding:10px 12px;border-radius:8px;margin-top:10px}.explain--good{border-color:var(--good)}.explain--bad{border-color:var(--bad)}.citation{font-size:.85rem;color:var(--muted)}.flag{font-size:1.2rem;background:none;border:none;cursor:pointer}.flashcard{min-height:120px;display:flex;align-items:center;justify-content:center;text-align:center;padding:16px;border:2px dashed var(--line);border-radius:var(--radius);background:#fff;cursor:pointer;font-size:1.1rem}.flashcard--back{border-style:solid;border-color:var(--red)}.list{list-style:none;padding:0;margin:0}.list__item{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 0;border-top:1px solid var(--line);text-decoration:none;color:var(--text)}.list__item:first-child{border-top:none}.list__item--done{color:var(--muted)}.list__chev{color:var(--muted);font-size:1.2rem}.tabbar{position:fixed;left:0;right:0;bottom:0;height:calc(var(--tab-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line);display:flex;justify-content:space-around;z-index:10}.tab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:.72rem;font-weight:600;text-decoration:none;color:var(--muted)}.tab--active{color:var(--red)}.tab__icon{font-size:1.3rem}.result-q{border-top:1px solid var(--line);padding:12px 0}.result-q:first-child{border-top:none}.heat{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.heat__cell{aspect-ratio:1;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;background:var(--line);color:var(--muted)}.heat__cell--pass{background:var(--good-bg);color:var(--good)}.heat__cell--fail{background:var(--bad-bg);color:var(--bad)}.heat__cell--current{outline:2px solid var(--red);outline-offset:1px}.timer{font-variant-numeric:tabular-nums;font-weight:700}.study{border-top:1px solid var(--line)}.study:first-of-type{border-top:none}.study__head{display:flex;justify-content:space-between;align-items:center;gap:10px;width:100%;text-align:left;padding:12px 0;background:none;border:none;color:var(--text);font-weight:600;font-size:1rem;cursor:pointer}.study__chev{color:var(--muted)}.study__body{padding:0 0 12px;font-size:.95rem;line-height:1.55}.study__p{margin:0 0 .5rem}.study__p--d1{margin-left:1rem}.study__p--d2{margin-left:2rem}.study__p--d3{margin-left:3rem}.study__list{margin:0 0 .6rem;padding-left:1.2rem}.study__list li{margin-bottom:.3rem}.study__note{font-size:.8rem;color:var(--muted);border-left:3px solid var(--line);padding-left:8px;margin:.6rem 0}.study__src{font-size:.8rem;color:var(--muted);margin-top:.6rem}.study__group{margin:18px 0 6px;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}.study__tablewrap{overflow-x:auto;margin:.4rem 0 .8rem;-webkit-overflow-scrolling:touch}.study__table{border-collapse:collapse;font-size:.85rem;min-width:100%}.study__table th,.study__table td{border:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}.study__table th{background:var(--bg);font-weight:600}.study__table tr:nth-child(2n) td{background:#fcfcfb}