:root{color-scheme:light;font-family:ui-rounded,SF Pro Rounded,Nunito,PingFang SC,system-ui,sans-serif;color:#102031;background:#f3fcff;background:oklch(.985 .012 220);--surface: oklch(1 0 0);--surface-soft: oklch(.965 .026 210);--ink: oklch(.22 .045 252);--muted: oklch(.43 .035 248);--primary: oklch(.64 .18 225);--primary-strong: oklch(.52 .2 228);--school-red: oklch(.58 .22 28);--school-coral: oklch(.72 .16 35);--flower: oklch(.66 .22 28);--success: oklch(.63 .16 155);--border: oklch(.88 .03 230);--shadow: 0 8px 24px oklch(.55 .08 230 / .12)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;min-height:100dvh;overflow-x:hidden;-webkit-tap-highlight-color:transparent}button,input,select,textarea{font:inherit}button{border:0;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}.shell{width:min(100%,760px);min-height:100vh;min-height:100dvh;margin:0 auto;padding:max(18px,env(safe-area-inset-top)) max(18px,env(safe-area-inset-right)) max(18px,env(safe-area-inset-bottom)) max(18px,env(safe-area-inset-left))}.centered{display:grid;place-items:center}.loading-card,.identify-panel,.study-card,.finish-panel,.share-panel,.calendar-panel{background:var(--surface);border:1px solid var(--border);border-radius:16px}.loading-card{display:grid;justify-items:center;gap:12px;width:min(100%,520px);padding:32px 22px;color:var(--muted);text-align:center;box-shadow:var(--shadow)}.loading-card strong{color:var(--ink);font-size:1.1rem}.loading-date{display:inline-flex;align-items:center;min-height:34px;padding:0 12px;color:var(--school-red);background:#fff2ec;background:oklch(.97 .055 42);border-radius:999px;font-size:.94rem;font-weight:900}.loading-title{max-width:14ch;margin:2px 0 0;color:var(--ink);font-size:1.72rem;line-height:1.18;text-wrap:balance}.loading-note{max-width:26rem;margin:0;color:var(--muted);font-size:1.02rem;font-weight:750;line-height:1.75;text-wrap:pretty}.loading-dots{display:inline-flex;gap:7px;align-items:center;min-height:24px}.loading-dots i{width:8px;height:8px;background:var(--primary);border-radius:50%;animation:loadingPulse .95s ease-in-out infinite}.loading-dots i:nth-child(2){animation-delay:.14s}.loading-dots i:nth-child(3){animation-delay:.28s}.loading-card button{min-height:46px;padding:0 16px;color:#fff;background:var(--primary);border-radius:12px;font-weight:900}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px;margin-bottom:18px}.brand-strip{display:flex;align-items:center;gap:10px;min-height:92px;margin-bottom:14px;padding:12px 14px;overflow:hidden;color:#fff;background:radial-gradient(circle at 88% 18%,oklch(.88 .11 58 / .95) 0 8px,transparent 9px),linear-gradient(135deg,var(--school-red),var(--school-coral));border-radius:16px}.brand-strip img{width:58px;height:auto;flex:0 0 auto;object-fit:contain}.school-name{display:grid;gap:2px;min-width:0;margin-right:auto;text-shadow:0 1px 2px oklch(.25 .08 28 / .28)}.school-name span{font-size:.95rem;font-weight:950}.school-name strong{font-size:.98rem;font-weight:900;line-height:1.2;text-wrap:balance}.class-mark{display:grid;justify-items:end;gap:3px;text-align:right;text-shadow:0 1px 2px oklch(.25 .08 28 / .28)}.class-mark span{font-size:1.34rem;font-weight:950}.class-mark strong{font-size:.86rem;font-weight:900}.topbar strong{display:block;font-size:1.2rem;text-wrap:balance}.topbar>div:first-child{min-width:0}.date-label{margin:0 0 4px;color:var(--muted);font-size:.92rem}.stats-pill{display:inline-flex;align-items:center;gap:6px;min-height:42px;padding:0 14px;color:var(--flower);background:#fff2ec;background:oklch(.97 .03 45);border-radius:999px;font-weight:800;white-space:nowrap}.lesson-switcher{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:-4px 0 16px}.lesson-switcher button,.review-picker{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;color:var(--primary-strong);background:#d3f1fe;border:1px solid oklch(.88 .04 225);border-radius:14px;font-weight:900}.lesson-switcher button.active{color:#fff;background:var(--primary)}.lesson-switcher button:disabled{opacity:.58}.review-picker{grid-column:1 / -1;justify-content:flex-start;padding:0 12px;overflow:hidden}.review-picker select{width:100%;min-width:0;min-height:48px;color:var(--primary-strong);background:transparent;border:0;outline:0;font:inherit;font-weight:900}.identify-panel{display:grid;justify-items:center;gap:16px;padding:34px 20px;text-align:center}.identify-panel h1{margin:0;font-size:2rem}.identify-panel p{max-width:28rem;margin:0;color:var(--muted);line-height:1.6}.identify-form{display:grid;width:min(100%,420px);gap:12px}.identify-form input{width:100%;min-height:58px;padding:0 18px;border:2px solid var(--border);border-radius:14px;color:var(--ink);font-size:1.2rem}.identify-form input:focus{border-color:var(--primary);outline:3px solid oklch(.82 .09 225 / .45)}.identify-form button,.finish-button{min-height:58px;border-radius:14px;color:#fff;background:var(--primary);font-weight:900}.study-area{display:grid;gap:14px}.progress-row{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;font-weight:800}.progress-track{height:10px;overflow:hidden;background:#cde2eb;border-radius:999px}.progress-track div{height:100%;background:var(--success);border-radius:inherit;transition:width .18s 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14px;color:#fff;background:var(--primary);border-radius:16px;font-size:1.08rem;font-weight:900}.round-action.recording{background:var(--flower)}.round-action.muted{color:var(--muted);background:#ddeaf2}.soft-message{max-width:34rem;margin:0;color:var(--muted);line-height:1.5}.recording-panel{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}.recording-panel button,.listen-mine,.page-nav button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:46px;padding:0 14px;color:var(--primary-strong);background:#d3f1fe;border-radius:12px;font-weight:850}.listen-mine{color:#005e28;color:oklch(.42 .14 150);background:#d5f5da}.page-nav{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}.page-nav button{min-height:54px}.page-nav svg,.round-action svg,.finish-button svg,.mini-action svg,.share-copy-button svg,.lesson-switcher button svg{flex:0 0 auto}.finish-panel{min-height:72px;padding:14px;text-align:center}.finish-panel p{margin:0;color:var(--muted);line-height:1.5}.finish-cta{display:grid;justify-items:center;gap:10px}.finish-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;max-width:420px;font-size:1.08rem}.reward{position:relative;display:grid;justify-items:center;gap:10px;min-height:336px;padding:28px 18px 26px;overflow:hidden;color:var(--school-red);background:radial-gradient(circle at 20% 24%,oklch(.95 .11 100 / .95) 0 28px,transparent 29px),radial-gradient(circle at 82% 18%,oklch(.93 .15 36 / .92) 0 22px,transparent 23px),radial-gradient(circle at 74% 82%,oklch(.89 .12 82 / .95) 0 18px,transparent 19px),radial-gradient(circle at 16% 18%,oklch(.9 .12 92) 0 16px,transparent 17px),radial-gradient(circle at 88% 76%,oklch(.86 .14 25) 0 20px,transparent 21px),linear-gradient(180deg,#fffbf7,#ffe5db);background:radial-gradient(circle at 20% 24%,oklch(.95 .11 100 / .95) 0 28px,transparent 29px),radial-gradient(circle at 82% 18%,oklch(.93 .15 36 / .92) 0 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#07172738}.history-badge{justify-self:start;min-height:34px;padding:7px 12px;color:var(--school-red);background:#fff2ec;background:oklch(.97 .07 42);border-radius:999px;font-size:.92rem;font-weight:900}.history-card h2{margin:0;font-size:1.65rem;line-height:1.2}.history-card p{margin:0;color:var(--muted);line-height:1.65}.history-quick-picks{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.history-quick-picks button,.history-save{min-height:50px;border-radius:14px;font-weight:900}.history-quick-picks button{color:var(--primary-strong);background:#d9f4ff;background:oklch(.95 .035 225)}.history-quick-picks button.active{color:#fff;background:linear-gradient(135deg,var(--primary),oklch(.56 .19 200))}.history-field{display:grid;gap:8px;text-align:left;font-weight:800}.history-field input{min-height:54px;padding:0 14px;border:2px solid var(--border);border-radius:14px;font-size:1.2rem}.history-save{color:#fff;background:linear-gradient(135deg,var(--school-red),var(--school-coral))}.toast{position:fixed;right:16px;bottom:16px;left:16px;max-width:560px;margin:0 auto;padding:14px 16px;color:#fff;background:#0e2a45;border-radius:14px;box-shadow:0 8px 20px #07172738;line-height:1.5}.mode-switch{display:inline-flex;gap:8px;margin-bottom:14px;padding:4px;background:#e1f2f9;border-radius:999px}.mode-switch button{min-height:38px;padding:0 14px;color:var(--muted);background:transparent;border-radius:999px;font-weight:800}.mode-switch button.active{color:#fff;background:var(--primary)}.admin-shell{display:grid;gap:18px;padding-bottom:24px}.admin-hero,.admin-section{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}.admin-hero{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding:18px}.admin-hero p{margin:0 0 6px;color:var(--muted)}.admin-hero 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