:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;color:#172d26;background:#f3f7f4;font-synthesis:none;--primary: #176b52;--surface: #fff;--muted: #566d61;--line: #d8e6de;--tint: #e5efe9;color-scheme:light dark}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled,.disabled{opacity:.5;cursor:default}a{color:var(--primary)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #d49326;outline-offset:4px}.app{max-width:900px;margin:auto;padding:calc(18px + env(safe-area-inset-top)) max(22px,env(safe-area-inset-right)) calc(110px + env(safe-area-inset-bottom)) max(22px,env(safe-area-inset-left));min-height:100vh;min-height:100dvh}.masthead{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:28px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:750;font-size:18px}.brand small{display:block;font-size:11px;font-weight:400;margin-top:4px;color:var(--muted)}.brand-icon{background:var(--primary);color:#fff;border-radius:12px;display:grid;place-items:center;width:42px;height:42px;font-size:24px}.connection{font-size:11px;color:var(--muted);max-width:110px;text-align:right}.page-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:32px 0 28px}h1{font-size:clamp(25px,5vw,34px);margin:6px 0;letter-spacing:-1px}h2{font-size:19px;margin:0 0 16px}.eyebrow{font-size:12px;letter-spacing:.08em;color:var(--muted);margin:0 0 8px}.week-badge{flex-shrink:0;font-size:12px;padding:10px;border:1px solid var(--line);border-radius:12px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.section-heading h2{margin:0}.section-heading span{font-size:12px;color:var(--muted)}section{margin-bottom:30px}.lesson{border:1px solid var(--line);background:var(--surface);color:inherit;border-radius:18px;width:100%;text-align:left;padding:20px;display:flex;align-items:flex-start;gap:18px;margin:0 0 10px}.lesson-time{font-size:24px;font-variant-numeric:tabular-nums;letter-spacing:-1px;flex-shrink:0;font-weight:700}.lesson-time small{display:block;font-size:12px;letter-spacing:0;font-weight:400;margin-top:5px}.lesson-content{min-width:0;flex:1;display:grid;gap:8px;overflow-wrap:anywhere}.lesson-content strong{font-size:17px;line-height:1.45}.lesson-content span{font-size:14px;line-height:1.6}.lesson-content small{font-size:11px;color:var(--muted)}.feature{background:var(--primary);color:#fff;padding:28px 20px;border:none;position:relative;border-top:6px solid #90c5ac}.feature .lesson-content small{color:#d8ebe1}.feature .lesson-time{font-size:30px}.empty{padding:32px 20px;background:var(--surface);border:1px solid var(--line);border-radius:24px;text-align:center}.empty p{max-width:370px;margin:16px auto;color:var(--muted);line-height:1.8}.empty-calendar{width:120px;margin:0 auto 28px;border-top:8px solid var(--primary);border-radius:12px;background:var(--tint);padding:12px;font-size:12px;color:var(--muted)}.empty-calendar big{display:block;font-size:54px;color:var(--primary);font-weight:750;letter-spacing:-3px}.empty.small{padding:24px}.primary,.secondary,.file-button{display:block;text-align:center;text-decoration:none;width:100%;padding:15px 18px;border-radius:14px;font-weight:650;min-height:48px;margin:12px 0}.primary{background:var(--primary);color:#fff;border:1px solid var(--primary)}.secondary{background:transparent;border:1px solid var(--line);color:var(--primary)}.quiet{border:0;background:none;color:var(--primary);padding:12px;min-height:44px;flex-shrink:0}.panel{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:24px}.panel p{line-height:1.7}.panel label{display:block;font-weight:600;font-size:14px}input,select,textarea{border:1px solid var(--line);background:var(--surface);color:inherit;border-radius:10px;padding:12px;min-height:48px;max-width:100%}input[type=date]{display:block;width:100%;margin-top:10px}input[type=file]{position:absolute;width:1px;height:1px;opacity:0;min-height:0}.file-button{position:relative;cursor:pointer}.file-button:focus-within{outline:3px solid #d49326}.help{font-size:13px;color:var(--muted);line-height:1.75}.actions{display:flex;gap:10px}.actions a{font-size:13px}.text-link{display:inline-block;font-size:14px;padding:12px 0}ol{padding-left:22px;line-height:1.9;font-size:14px}li{margin-bottom:12px}.notice{padding:16px;background:var(--tint);border-left:3px solid var(--primary);border-radius:8px;line-height:1.6;margin:12px 0;overflow-wrap:anywhere}.week-picker{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;gap:16px}.week-picker button{border:1px solid var(--line);background:var(--surface);color:inherit;width:48px;height:48px;border-radius:12px}.week-picker select{margin-left:12px}.no-class{color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:18px;font-size:14px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--line);display:flex;justify-content:center;padding:8px max(12px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));z-index:5}.bottom-nav button{background:none;border:0;color:var(--muted);width:min(33.33%,220px);padding:8px 4px;border-radius:14px;font-size:12px;min-height:54px}.bottom-nav button span{display:block;font-size:24px;margin-bottom:3px}.bottom-nav button[aria-current]{background:var(--tint);color:var(--primary);font-weight:700}footer{text-align:center;font-size:12px;color:var(--muted);line-height:2.2;margin:30px 0}dialog{width:min(560px,calc(100% - 28px));max-height:85vh;max-height:85dvh;overflow:auto;border:1px solid var(--line);border-radius:22px;background:var(--surface);color:inherit;padding:24px}dialog::backdrop{background:#071e19a6}dialog header{display:flex;justify-content:space-between;align-items:center;gap:12px}dialog h2{margin:0;overflow-wrap:anywhere}dialog textarea{width:100%;min-height:170px;resize:none}.preview-list{max-height:240px;overflow:auto;margin:20px 0}.preview-list>div,.candidate{border-bottom:1px solid var(--line);padding:12px 0}.preview-list small{display:block;color:var(--muted);margin-top:5px}.detail-time{font-size:28px;font-weight:700;font-variant-numeric:tabular-nums}@media(max-width:380px){.app{padding-left:16px;padding-right:16px}.panel{padding:18px}.lesson{gap:12px;padding:16px}.feature .lesson-time{font-size:25px}.actions{flex-direction:column;gap:0}}@media(prefers-color-scheme:dark){:root{background:#14251e;color:#e2f2e9;--primary: #91d6b4;--surface: #1c3026;--muted: #a8c0b2;--line: #365345;--tint: #244c3c}.primary,.feature,.brand-icon{color:#14251e}.feature .lesson-content small{color:#244c3c}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}