:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{box-sizing:border-box;width:100%;min-height:100svh}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 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input{color:#0f172a;text-align:center;background:#fff;border:none;outline:none;min-width:0;font-size:18px;font-weight:850}.timer-time-stepper span{color:#64748b;text-align:center;font-size:13px;font-weight:850}.timer-display{color:#0f172a;text-align:center;font-variant-numeric:tabular-nums;margin:8px 0 14px;font-size:54px;font-weight:900;line-height:1}.timer-progress{background:#e2e8f0;border-radius:999px;height:10px;margin-bottom:18px;overflow:hidden}.timer-progress span{border-radius:inherit;background:linear-gradient(90deg,#1e5ce6,#4e9bff);height:100%;transition:width .25s;display:block}.timer-actions{grid-template-columns:1.2fr 1fr 1fr;gap:10px;display:grid}.timer-primary-btn,.timer-secondary-btn,.record-save-btn{cursor:pointer;border:1px solid #dbe3ee;border-radius:12px;min-height:48px;font-size:15px;font-weight:850}.timer-primary-btn,.record-save-btn{color:#fff;background:#1e5ce6;border:none}.timer-secondary-btn{color:#334155;background:#f8fafc}.timer-primary-btn:disabled,.timer-secondary-btn:disabled,.record-save-btn:disabled{cursor:default;opacity:.48}.record-row{gap:8px;margin-bottom:16px;display:grid}.record-row label{color:#64748b;font-size:13px;font-weight:800}.count-stepper{background:#f8fafc;border:1.5px solid #e2e8f0;border-radius:14px;grid-template-columns:56px minmax(82px,1fr) 56px;max-width:240px;display:grid;overflow:hidden}.count-stepper button{color:#1e5ce6;cursor:pointer;background:#eef5ff;border:none;min-height:52px;font-size:24px;font-weight:900}.count-stepper input{color:#0f172a;text-align:center;background:#fff;border:none;outline:none;min-width:0;font-size:20px;font-weight:850}.rating-options{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.rating-btn{color:#334155;cursor:pointer;background:#f8fafc;border:1.5px solid #e2e8f0;border-radius:12px;min-height:48px;font-size:14px;font-weight:850}.rating-btn.is-active{color:#15803d;background:#ecfdf5;border-color:#86efac}.memo-input{color:#0f172a;background:#f8fafc;border:1.5px solid #e2e8f0;border-radius:12px;outline:none;min-height:48px;padding:0 14px;font-size:15px;font-weight:650}.record-save-btn{width:100%;margin-top:2px}.record-message{color:#15803d;text-align:center;background:#ecfdf5;border:1px solid #bbf7d0;border-radius:10px;margin-top:12px;padding:10px 12px;font-size:13px;font-weight:800}.record-message.is-error{color:#dc2626;background:#fef2f2;border-color:#fecaca}@media (width<=720px){.lesson-tools-stack{gap:14px}.lesson-tool-card{padding:20px 18px}.rating-options{grid-template-columns:1fr}.timer-display{font-size:46px}.timer-actions{grid-template-columns:1fr}.timer-primary-btn,.timer-secondary-btn,.record-save-btn,.rating-btn{min-height:54px}}.week-lesson-card{transition:transform .18s,box-shadow .18s,border-color .18s,background-color .18s;transform:translateY(0)scale(1);box-shadow:0 6px 16px #0f172a09}.week-lesson-card:hover{transform:translateY(-2px)scale(1.01);box-shadow:0 14px 34px #0f172a17}.week-lesson-card:active{transform:translateY(0)scale(.995);box-shadow:0 7px 18px #0f172a14}@media (hover:none){.week-lesson-card:hover{transform:none;box-shadow:0 6px 16px #0f172a09}}