:root{--bg: #f6f7f4;--surface: #ffffff;--text: #1d2321;--muted: #5e6864;--border: #d9ddd8;--accent: #2f7d5b;--accent-text: #ffffff;--accent-soft: #e2f1e9;--ok: #2f7d5b;--ok-soft: #e2f1e9;--ng: #b5432f;--ng-soft: #fbe7e2;--warn: #8a5a00;--warn-soft: #fff3d6;color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--bg: #141816;--surface: #1e2421;--text: #e6ebe8;--muted: #9aa5a0;--border: #333c38;--accent: #5fbf92;--accent-text: #0d1a14;--accent-soft: #1f3a2d;--ok: #5fbf92;--ok-soft: #1f3a2d;--ng: #f08a74;--ng-soft: #3d221c;--warn: #f2c35b;--warn-soft: #3a2f14}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans,Noto Sans KR,Apple SD Gothic Neo,Malgun Gothic,sans-serif;font-size:17px;line-height:1.5}:lang(ko){word-break:keep-all}a{color:var(--accent)}h1{font-size:1.35rem;margin:0;line-height:1.3}h2{font-size:1.1rem;margin:1.2rem 0 .6rem}p{margin:.4rem 0}.app{min-height:100vh;display:flex;flex-direction:column}.main{flex:1;width:100%;max-width:640px;margin:0 auto;padding:12px 16px 24px}.page>*+*{margin-top:12px}.banner{padding:10px 16px;font-size:.9rem;text-align:center}.banner.warn{background:var(--warn-soft);color:var(--warn)}.topbar{display:flex;flex-direction:column;gap:4px}.back{text-decoration:none;font-size:.95rem;padding:6px 0;align-self:flex-start}.hero{padding:8px 0}.muted{color:var(--muted)}.small{font-size:.88rem}.big{font-size:1.4rem;font-weight:700}.center{text-align:center}.warn-text{color:var(--warn)}.ng-text{color:var(--ng)}.card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:14px 16px;color:inherit;text-decoration:none}a.card:active{transform:scale(.99)}.card.disabled{opacity:.5;pointer-events:none}.center.card>.btn{margin:6px 4px 0}.daily-card{display:flex;flex-direction:column;gap:4px;background:var(--accent);color:var(--accent-text);border-color:var(--accent);padding:18px 16px}.daily-card strong{font-size:1.25rem}.daily-card .muted{color:inherit;opacity:.85}.daily-card.done{background:var(--accent-soft);color:var(--text);border-color:var(--border)}.menu,.list{display:flex;flex-direction:column;gap:8px}.menu-item{display:flex;justify-content:space-between;align-items:center;gap:8px;min-height:56px}.pill{background:var(--accent-soft);color:var(--text);border-radius:999px;padding:2px 10px;font-size:.82rem;white-space:nowrap}.topic{display:flex;justify-content:space-between;align-items:center;gap:8px;min-height:64px}.topic .ko{font-size:1.15rem;font-weight:600}.topic .vi{color:var(--muted);font-size:.92rem}.topic-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;font-size:.85rem}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 18px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit;font-weight:600;text-decoration:none;cursor:pointer}.btn.primary{background:var(--accent);color:var(--accent-text);border-color:var(--accent)}.btn.ghost{background:transparent}.btn.small{min-height:36px;padding:4px 12px;font-size:.9rem}.btn.wide{width:100%}.btn:disabled{opacity:.6}button.link{background:none;border:0;color:var(--accent);font:inherit;padding:8px 0;cursor:pointer;text-decoration:underline}.nav-row{display:flex;gap:8px;justify-content:space-between}.nav-row .btn{flex:1}.vi-badge{display:inline-block;font-size:.72rem;color:var(--warn);background:var(--warn-soft);border-radius:6px;padding:1px 6px;vertical-align:middle}.vi{color:var(--muted)}.flashcard{background:var(--surface);border:1px solid var(--border);border-radius:18px;min-height:260px;padding:24px 16px;text-align:center;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px}.flashcard .word{font-size:2.6rem;font-weight:700;line-height:1.2}.flashcard .meaning{font-size:1.3rem;font-weight:600;color:var(--text)}.example{border-top:1px dashed var(--border);padding-top:10px;margin-top:6px}.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.grades .btn{padding:10px 4px}.grade-again{color:var(--ng)}.grade-easy{color:var(--ok)}.progress{display:flex;align-items:center;gap:10px;font-size:.9rem;color:var(--muted)}.bar{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden}.bar>div{height:100%;background:var(--accent);transition:width .2s}.question>*+*{margin-top:10px}.passage{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:12px;white-space:pre-line}.prompt{font-size:1.15rem;font-weight:600;white-space:pre-line}.choices{display:flex;flex-direction:column;gap:8px}.choice{display:flex;gap:10px;align-items:flex-start;text-align:left;min-height:52px;padding:12px 14px;border-radius:12px;border:1.5px solid var(--border);background:var(--surface);color:var(--text);font:inherit;cursor:pointer}.choice:disabled{cursor:default}.choice .mark{font-weight:700;color:var(--muted)}.choice.selected{border-color:var(--accent);background:var(--accent-soft)}.choice.right{border-color:var(--ok);background:var(--ok-soft)}.choice.wrong{border-color:var(--ng);background:var(--ng-soft)}.explain{border-radius:12px;padding:12px 14px;border-left:4px solid;background:var(--surface)}.explain.ok{border-color:var(--ok)}.explain.ng{border-color:var(--ng)}.verdict{font-weight:700}.audio-box{display:flex;flex-direction:column;gap:8px;min-height:48px}.script{background:var(--surface);border:1px dashed var(--border);border-radius:10px;padding:10px 12px}.note{font-size:.85rem;color:var(--warn)}.exam-bar{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:center;background:var(--bg);padding:8px 0;border-bottom:1px solid var(--border)}.timer{font-variant-numeric:tabular-nums;font-weight:700}.timer.low{color:var(--ng)}.qgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:6px}.qnum{min-height:40px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit;font-size:.9rem;cursor:pointer}.qnum.answered{background:var(--accent-soft)}.qnum.current{border:2px solid var(--accent);font-weight:700}.submit{margin-top:16px}.floors{padding-left:1.2rem}.floors .ok{color:var(--ok)}.floors .ng{color:var(--ng)}.warn-box{background:var(--warn-soft);color:var(--warn);border-radius:10px;padding:10px 12px;font-weight:600}.wrong-item summary{cursor:pointer}.wrong-item[open]>*+*{margin-top:10px}.history{padding-left:1.2rem;margin:0}.ad-slot{height:90px;border:1px dashed var(--border);border-radius:8px;display:flex;align-items:center;justify-content:center}.ad-slot span{font-size:.7rem;color:var(--muted)}.footer{border-top:1px solid var(--border);padding:16px;font-size:.8rem;color:var(--muted);text-align:center;max-width:640px;margin:0 auto;width:100%}.footer p{margin:2px 0}.rate-toggle{display:inline-flex;gap:6px;margin-left:8px;vertical-align:middle}.choice.pic{align-items:center}.pic-body{display:flex;flex-direction:column;gap:4px}.pic-img{font-size:2.4rem;line-height:1.2;letter-spacing:4px}.pic-cap{font-size:.9rem;opacity:.8}.tip{font-size:.92rem;line-height:1.5}#about{max-width:640px;margin:0 auto;padding:8px 16px 24px;color:var(--muted);font-size:.9rem;line-height:1.6;border-top:1px solid var(--border)}#about h2{font-size:1.05rem;color:var(--text, inherit);margin:16px 0 8px}#about h3{font-size:.95rem;margin:14px 0 4px}#about ul{padding-left:18px;margin:4px 0}body[data-route=other] #about{display:none}body[data-route=home] .app{min-height:0}.track-switch{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.writing-box{width:100%;box-sizing:border-box;font:inherit;font-size:1rem;line-height:1.6;padding:12px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text);resize:vertical}.model{white-space:pre-wrap;line-height:1.7}.criteria{list-style:none;padding:0;margin:0}.criteria li{margin:8px 0}.app,#about{padding-bottom:64px}body[data-route=home] .app{padding-bottom:0}