:root{--ink:#18332d;--muted:#74827d;--paper:#f5f1e8;--card:#fffdf8;--line:#dedbd1;--green:#236b57;--green2:#dcebe5;--amber:#d79b45;--red:#b85d52;--shadow:0 18px 50px rgba(28,54,46,.08)}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans TC","Noto Sans JP","Segoe UI",sans-serif}.shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:244px;padding:32px 22px;background:#17382f;color:#fff;display:flex;flex-direction:column;z-index:10}.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border:1px solid rgba(255,255,255,.35);border-radius:13px;font-family:serif;font-size:23px}.brand strong,.brand small{display:block}.brand strong{font-size:17px;letter-spacing:.04em}.brand small{margin-top:2px;color:#abc3ba;font-size:11px}.sidebar nav{display:grid;gap:8px;margin-top:58px}.sidebar nav a{display:flex;gap:13px;align-items:center;padding:13px 14px;border-radius:11px;color:#b8cdc5;text-decoration:none;font-size:14px}.sidebar nav a span{width:20px;text-align:center}.sidebar nav a:hover,.sidebar nav a.active{color:#fff;background:rgba(255,255,255,.1)}.sync-note{display:flex;gap:10px;align-items:flex-start;margin-top:auto;padding:14px 8px;border-top:1px solid rgba(255,255,255,.12)}.sync-dot{width:8px;height:8px;margin-top:5px;background:#77c69e;border-radius:50%;box-shadow:0 0 0 4px rgba(119,198,158,.12)}.sync-note strong,.sync-note small{display:block}.sync-note strong{font-size:12px}.sync-note small{margin-top:4px;color:#9bb7ad;font-size:10px;line-height:1.4}main{margin-left:244px;min-height:100vh;padding:46px 6vw 70px}.mobile-header{display:none}.page{display:none;max-width:1050px;margin:auto}.page.active{display:block}.page-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:28px}.page-head.compact{margin-bottom:34px}.eyebrow{margin:0 0 9px;color:var(--green);font-size:11px;font-weight:800;letter-spacing:.18em}.page-head h1{margin:0;font-family:"Noto Serif TC","Noto Serif JP",serif;font-size:clamp(28px,4vw,43px);font-weight:650;letter-spacing:-.04em}.muted{margin:10px 0 0;color:var(--muted);font-size:14px}.streak{display:flex;align-items:center;gap:10px;padding:12px 18px;background:#fff9e9;border:1px solid #eadfc2;border-radius:14px}.streak>span{font-size:22px}.streak strong,.streak small{display:block}.streak strong{font-size:20px}.streak small{color:#89795e;font-size:10px}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:25px}.stats-grid article{padding:18px 20px;background:rgba(255,255,255,.5);border:1px solid var(--line);border-radius:15px}.stats-grid small,.stats-grid strong,.stats-grid span{display:block}.stats-grid small{color:var(--muted);font-size:11px}.stats-grid strong{display:inline-block;margin:7px 6px 0 0;font-family:serif;font-size:26px}.stats-grid span{display:inline;color:var(--muted);font-size:11px}.session-area{max-width:790px;margin:auto}.session-top{display:flex;align-items:center;gap:13px;margin:0 5px 10px;color:var(--muted);font-size:11px}.progress{height:4px;flex:1;overflow:hidden;background:#d8ddd9;border-radius:4px}.progress i{display:block;width:10%;height:100%;background:var(--green);border-radius:4px;transition:.3s}.text-button{border:0;background:none;color:var(--muted);cursor:pointer}.flashcard{min-height:510px;padding:28px 38px 32px;background:var(--card);border:1px solid #e2ded3;border-radius:22px;box-shadow:var(--shadow);text-align:center}.card-meta{display:flex;justify-content:space-between}.card-meta span{padding:6px 10px;border-radius:99px;background:var(--green2);color:var(--green);font-size:10px;font-weight:700}.card-meta span+span{background:#f1eee5;color:#7f796d}.prompt-label{margin:55px 0 16px;color:var(--green);font-size:11px;font-weight:800;letter-spacing:.16em}.context{max-width:560px;margin:0 auto 13px;color:var(--muted);font-size:13px}.flashcard h2{max-width:650px;margin:0 auto 15px;font-family:"Noto Serif JP","Noto Serif TC",serif;font-size:clamp(24px,3vw,34px);line-height:1.55}.hint{min-height:22px;color:#9a8e79;font-size:12px}.primary,.secondary{border-radius:11px;padding:12px 18px;font:inherit;font-size:13px;font-weight:700;cursor:pointer}.primary{border:1px solid var(--green);background:var(--green);color:#fff}.primary:hover{background:#174f40}.secondary{border:1px solid var(--line);background:#fff;color:var(--ink)}#revealButton{margin-top:24px;padding:14px 28px}#revealButton span{margin-left:18px;padding:3px 6px;border-radius:5px;background:rgba(255,255,255,.15);font-size:9px}.meaning{font-size:16px}.example{max-width:620px;margin:24px auto 14px;padding:17px 20px;background:#f4f3ed;border-radius:13px;text-align:left}.example small{color:var(--green);font-size:10px;font-weight:800}.example p{margin:8px 0;font-size:14px;line-height:1.6}.example p:last-child{color:var(--muted);font-size:12px}.note{max-width:620px;margin:0 auto;padding:11px 15px;border-left:3px solid var(--amber);background:#fff9e9;text-align:left;color:#695f4d;font-size:12px;line-height:1.6}.rate-label{margin:24px 0 10px;color:var(--muted);font-size:11px}.ratings{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;max-width:520px;margin:auto}.ratings button{padding:11px;border:1px solid var(--line);border-radius:11px;background:#fff;cursor:pointer}.ratings strong,.ratings small{display:block}.ratings small{margin-top:4px;color:var(--muted);font-size:9px}.ratings .again:hover{border-color:var(--red);color:var(--red)}.ratings .hard:hover{border-color:var(--amber);color:#9d6c27}.ratings .good:hover{border-color:var(--green);color:var(--green)}.empty{padding:70px 20px;text-align:center}.empty span{font-family:serif;color:var(--green)}.empty h2{font-size:30px;margin:12px}.empty p{color:var(--muted)}.empty button{margin-top:14px}.hidden{display:none!important}.toolbar{display:flex;gap:12px;margin-bottom:15px}.toolbar input,.toolbar select,.panel input[type=url]{padding:13px 15px;border:1px solid var(--line);border-radius:11px;background:#fff;font:inherit;color:var(--ink);outline:none}.toolbar input{flex:1}.toolbar select{min-width:150px}.toolbar input:focus,.panel input:focus{border-color:var(--green)}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.65)}table{width:100%;border-collapse:collapse;text-align:left}th,td{padding:15px 18px;border-bottom:1px solid #e8e4dc;font-size:13px}th{color:var(--muted);font-size:10px;letter-spacing:.08em}td ruby{font-size:17px}rt{font-size:9px;color:var(--muted)}.badge{padding:5px 8px;border-radius:99px;background:#eeeae1;color:#766f63;font-size:9px}.badge.ready{background:var(--green2);color:var(--green)}.settings-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:16px}.panel{padding:26px;background:rgba(255,255,255,.7);border:1px solid var(--line);border-radius:17px}.panel .step{color:var(--green);font-size:11px;font-weight:800}.panel h2{margin:8px 0 12px;font-family:serif;font-size:20px}.panel p{color:var(--muted);font-size:13px;line-height:1.7}.link-button{display:inline-block;text-decoration:none}.panel label{display:block;margin:18px 0 7px;font-size:11px;font-weight:700}.panel input[type=url]{width:100%}.panel label.check{display:flex;gap:8px;align-items:center;font-weight:400;color:var(--muted)}.button-row{display:flex;gap:9px;margin-top:20px}.form-message{min-height:20px!important;margin-bottom:0!important}.sync-explainer{margin-top:16px}.flow{display:flex;align-items:center;justify-content:center;gap:18px;padding:15px}.flow div{min-width:140px;padding:14px;text-align:center;background:#f5f2ea;border-radius:12px}.flow strong,.flow small{display:block}.flow small{margin-top:5px;color:var(--muted);font-size:9px}.flow>span{color:var(--green)}
.content-queue{display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center;margin-bottom:16px;padding:18px 20px;background:#17382f;color:#fff;border-radius:15px}.content-queue small{color:#a9c1b8;font-size:10px}.content-queue p{margin:4px 0 0;font-size:11px;color:#b9cec6}.content-queue>div:first-child p{color:#fff}.content-queue strong{font-size:20px}.content-queue span{font-size:10px;color:#b9cec6}.queue-progress{height:6px;overflow:hidden;background:rgba(255,255,255,.14);border-radius:9px}.queue-progress i{display:block;height:100%;width:0;background:#83caaa;border-radius:9px;transition:.35s}
@media(max-width:800px){.sidebar{transform:translateX(-100%);transition:.25s}.sidebar.open{transform:translateX(0)}main{margin-left:0;padding:20px 18px 50px}.mobile-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:34px}.mobile-header .brand-mark{background:var(--green);color:#fff}.mobile-header button{border:0;background:none;font-size:24px}.stats-grid{grid-template-columns:1fr}.stats-grid article{padding:12px 16px}.settings-grid{grid-template-columns:1fr}.flashcard{padding:20px 18px;min-height:530px}.page-head{display:block}.streak{display:none}.flow{flex-direction:column}.flow>span{transform:rotate(90deg)}.toolbar{display:grid}.content-queue{grid-template-columns:1fr;gap:10px}.ratings{gap:6px}.ratings button{padding:10px 5px}th:nth-child(3),td:nth-child(3){display:none}}
.phase-label{padding:5px 9px;border-radius:99px;background:var(--green2);color:var(--green);font-weight:800;white-space:nowrap}.study-guide{max-width:560px;margin:-5px auto 20px;color:var(--muted);font-size:12px}.study-next{margin-top:24px;padding:14px 28px}.study-next span{margin-left:18px;padding:3px 6px;border-radius:5px;background:rgba(255,255,255,.15);font-size:9px}
.inline-answer{display:inline-block;width:clamp(110px,22vw,220px);margin:0 8px;padding:3px 8px;border:0;border-bottom:3px solid var(--green);border-radius:0;background:#f4f7f4;color:var(--ink);font:inherit;text-align:center;outline:none;vertical-align:baseline}.inline-answer:focus{background:var(--green2);box-shadow:0 3px 0 rgba(35,107,87,.15)}.input-guide{margin:18px 0 -8px;color:var(--muted);font-size:10px}.answer-feedback{max-width:620px;margin:0 auto 18px;padding:11px 14px;border-radius:10px;font-size:12px;font-weight:700}.answer-feedback.correct{background:#e1f1e8;color:#176044}.answer-feedback.incorrect{background:#fff0ed;color:#9b433a}.answer-feedback.skipped{background:#f1eee5;color:#756d60}
.stats-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.stats-grid article{min-width:0}.stats-grid article strong{font-size:24px}.stats-grid article span{font-size:9px}@media(max-width:1100px){.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:800px){.stats-grid{grid-template-columns:1fr}}
.toolbar input{min-width:180px}.toolbar #statusFilter{min-width:175px}.toolbar select:focus{border-color:var(--green)}
.backup-panel{margin-top:16px}.backup-actions{flex-wrap:wrap}.import-backup-label{display:inline-flex;align-items:center;justify-content:center}
.material-summary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:18px 0 6px}.material-summary div{padding:14px 16px;background:#f5f2ea;border:1px solid #ebe5d8;border-radius:12px}.material-summary small,.material-summary strong{display:block}.material-summary small{color:var(--muted);font-size:10px}.material-summary strong{margin-top:5px;font-family:serif;font-size:26px}