:root{--bg:#f5f7fb;--panel:#fff;--text:#172033;--muted:#667085;--line:#e5e7eb;--primary:#2563eb;--primary2:#1d4ed8;--soft:#eff6ff;--ok:#15803d;--warn:#b45309;--shadow:0 10px 30px rgba(15,23,42,.08);--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;line-height:1.7}.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;padding:12px 18px;background:rgba(245,247,251,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.brand{font-weight:900;font-size:18px}.subtitle{font-size:12px;color:var(--muted)}.top-actions{margin-left:auto}.icon-btn,.ghost-btn,.btn,.player-btn{border:1px solid var(--line);background:#fff;border-radius:11px;min-height:40px;padding:8px 12px;cursor:pointer;font-weight:800;color:var(--text)}.btn.primary,.player-btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.success{background:var(--ok);border-color:var(--ok);color:#fff}.btn:disabled,.player-btn:disabled{opacity:.45;cursor:not-allowed}.hidden{display:none!important}#app{max-width:1100px;margin:0 auto;padding:24px 18px 125px}.hero{padding:28px;border-radius:24px;background:linear-gradient(135deg,#1d4ed8,#4f46e5);color:#fff;box-shadow:var(--shadow);margin-bottom:20px}.hero h1,.hero h2{margin:0 0 8px;line-height:1.25}.hero p{margin:0;color:#e0e7ff}.today-card{display:flex;justify-content:space-between;gap:18px;align-items:center;background:#fff;border:1px solid #bfdbfe;border-radius:18px;padding:18px 20px;margin:0 0 18px;box-shadow:var(--shadow)}.today-card h2{margin:2px 0 2px;font-size:20px}.today-card p{margin:0;color:var(--muted)}.today-actions{display:flex;gap:8px;flex-wrap:wrap}.shelf{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.book-card{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px}.book-icon{font-size:34px}.book-card h3{margin:0;font-size:21px}.book-meta{font-size:13px;color:var(--muted)}.progress{height:8px;background:#e2e8f0;border-radius:999px;overflow:hidden}.progress i{display:block;height:100%;background:var(--primary)}.book-actions,.lesson-actions,.lesson-nav,.coach-actions,.listen-only-actions{display:flex;gap:10px;flex-wrap:wrap}.module{margin:20px 0}.module h3{font-size:18px;margin:0 0 10px}.day-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.day-card{border:1px solid var(--line);background:#fff;border-radius:14px;padding:14px;cursor:pointer;text-align:left}.day-card.done{border-color:#86efac;background:#f0fdf4}.day-card.active{border-color:#93c5fd;background:#eff6ff}.day-num{font-size:12px;font-weight:900;color:var(--primary)}.day-title{font-weight:850;margin-top:3px}.day-goal{font-size:13px;color:var(--muted);margin-top:4px}.module-quiz{margin-top:10px;padding:14px;background:#fff;border:1px dashed #cbd5e1;border-radius:14px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.module-quiz>div:first-child{flex:1;min-width:220px}.quiz-badge{font-size:12px;font-weight:900;padding:5px 9px;border-radius:999px}.quiz-badge.good{background:#dcfce7;color:#166534}.quiz-badge.retry{background:#fef3c7;color:#92400e}.quiz-inline{width:100%;display:grid;gap:7px;margin-top:4px}.quiz-option{border:1px solid var(--line);background:#fff;border-radius:10px;text-align:left;padding:9px 11px;cursor:pointer}.quiz-option.correct{border-color:#86efac;background:#f0fdf4}.quiz-option.wrong{border-color:#fca5a5;background:#fef2f2}.quiz-feedback{font-size:13px;color:var(--muted);padding-top:4px}.lesson{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:18px}.lesson-main,.side-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.lesson-main h2{margin:0 0 8px}.eyebrow{font-size:12px;font-weight:900;color:var(--primary);letter-spacing:.05em}.goal{margin:14px 0;padding:14px 16px;border-radius:14px;background:linear-gradient(90deg,#eff6ff,#f5f3ff);border:1px solid #dbeafe}.section{margin:20px 0}.section h3{font-size:17px;margin:0 0 8px}.task{background:#fffbeb;border:1px solid #fde68a;border-radius:14px;padding:14px}.listen-script{background:#f8fafc;border:1px dashed #cbd5e1;border-radius:14px;padding:14px}.listen-script p{margin:8px 0}.side-card{height:max-content;position:sticky;top:82px}.side-card h3{margin-top:0}.stat{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:9px 0}.note{width:100%;min-height:120px;border:1px solid var(--line);border-radius:12px;padding:10px;font:inherit;resize:vertical}.check-row{display:flex;gap:8px;align-items:flex-start;margin:10px 0}.coach{border-top:1px solid var(--line);padding-top:18px}.coach-q{display:block;margin:14px 0}.coach-q textarea{display:block;width:100%;min-height:92px;border:1px solid var(--line);border-radius:12px;padding:10px;margin-top:7px;font:inherit;resize:vertical}.coach-checks{margin-top:12px;padding:12px 14px;border-radius:12px;background:#f0fdf4;border:1px solid #bbf7d0}.coach-checks ol{margin:0;padding-left:22px}.listen-only-head,.listen-only-actions{display:none}.empty{padding:30px;text-align:center;color:var(--muted)}.player{position:fixed;z-index:30;left:12px;right:12px;bottom:10px;max-width:1050px;margin:auto;background:rgba(255,255,255,.97);border:1px solid #cbd5e1;border-radius:16px;padding:10px 12px;box-shadow:0 14px 40px rgba(15,23,42,.18);backdrop-filter:blur(12px)}.player-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.player-meta{margin-right:auto;min-width:0;display:flex;flex-direction:column}.player-meta span{font-size:12px;color:var(--muted);max-width:420px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player-btn{min-width:42px}.select{border:1px solid var(--line);background:#fff;border-radius:10px;min-height:40px;padding:6px 8px}.player-progress{height:3px;background:#e2e8f0;border-radius:999px;overflow:hidden;margin-top:7px}.player-progress i{display:block;height:100%;width:0;background:var(--primary)}.speech-now{outline:3px solid rgba(37,99,235,.2);background:#eff6ff;border-radius:8px}.footer-note{margin-top:18px;color:var(--muted);font-size:12px}body.listen-only .topbar .top-actions{display:none}body.listen-only #app{max-width:760px;padding-top:14px}body.listen-only .hero,body.listen-only .normal-study,body.listen-only .side-card,body.listen-only .coach{display:none!important}body.listen-only .lesson{display:block}body.listen-only .lesson-main{padding:20px}body.listen-only .listen-only-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px}body.listen-only .listen-only-actions{display:flex;justify-content:center;margin:16px 0 6px}body.listen-only .listen-script{font-size:19px;line-height:1.9;padding:18px}body.listen-only .listen-script p{margin:14px 0}body.listen-only .player{max-width:760px}.listen-only-head h2{margin:2px 0 0}@media(max-width:850px){.shelf{grid-template-columns:1fr}.day-list{grid-template-columns:1fr}.lesson{grid-template-columns:1fr}.side-card{position:static}.hero{padding:22px}.today-card{align-items:flex-start;flex-direction:column}}@media(max-width:560px){#app{padding:16px 12px 145px}.topbar{padding:10px 12px}.player{left:8px;right:8px;bottom:7px}.player-meta{width:100%;margin:0}.player-meta span{max-width:none}.book-actions .btn,.lesson-actions .btn,.today-actions .btn{flex:1}.hero h1{font-size:25px}.listen-only-head{align-items:flex-start!important;flex-direction:column}.listen-only-head .btn{width:100%}body.listen-only .listen-script{font-size:18px;padding:14px}}
.top-actions{display:flex;align-items:center;gap:8px}.sync-status{font-size:12px;font-weight:800;color:var(--muted);white-space:nowrap}.sync-status[data-state="synced"]{color:var(--ok)}.sync-status[data-state="pending"],.sync-status[data-state="error"]{color:var(--warn)}
.auth-dialog{width:min(420px,calc(100% - 28px));border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow);color:var(--text)}.auth-dialog::backdrop{background:rgba(15,23,42,.42);backdrop-filter:blur(3px)}.auth-dialog h2{margin:0 34px 6px 0}.auth-dialog p{margin:0 0 18px;color:var(--muted)}.auth-close{position:absolute;right:14px;top:12px;border:0;background:transparent;font-size:26px;cursor:pointer;color:var(--muted)}.auth-form{display:grid;gap:14px}.auth-form label{display:grid;gap:5px;font-size:13px;font-weight:800}.auth-form input{width:100%;border:1px solid var(--line);border-radius:11px;padding:10px 12px;font:inherit}.auth-error{min-height:20px;color:#b91c1c;font-size:13px}.auth-user .btn{width:100%}@media(max-width:560px){.sync-status{display:inline-block;max-width:82px;overflow:hidden;text-overflow:ellipsis;font-size:10px}.subtitle{display:none}.top-actions{gap:5px}.top-actions .ghost-btn{padding:7px 9px}}