:root{--ink:#17385d;--muted:#8091a8;--blue:#287bef;--line:#e3ebf5;--bg:#f3f7fc}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.65 'Segoe UI','Microsoft YaHei',sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer;background:#fff;border:1px solid var(--line);border-radius:9px;padding:9px 15px;color:var(--ink)}button:hover{border-color:#8bb8f5;background:#f4f8ff}.primary{background:var(--blue);color:#fff;border-color:var(--blue)}.primary:hover{background:#1768d7;color:#fff}input,select,textarea{border:1px solid #dce6f1;background:#fff;border-radius:9px;padding:10px 12px;color:var(--ink);max-width:100%}input:focus,textarea:focus{outline:2px solid #aacdfb}small{color:var(--muted)}h1,h2,h3,p{margin-top:0}h1{font-size:30px;letter-spacing:-1px}h2{font-size:20px}h3{font-size:16px}aside{position:fixed;inset:0 auto 0 0;width:220px;background:#fff;border-right:1px solid var(--line);padding:32px 22px;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;font-size:20px;font-weight:700}.brand small{display:block;font-size:8px;letter-spacing:2px}.logo{display:inline-grid;place-items:center;background:var(--blue);color:white;border-radius:13px;width:44px;height:44px;font-size:24px}.nav-label{font-size:11px;color:#91a1b5;margin:45px 12px 12px}nav{display:grid;gap:7px}nav button{border:0;text-align:left;background:none;color:#657b97;padding:12px 16px}nav button.active{background:#eaf2ff;color:#2674dc;font-weight:600}.side-foot{margin-top:auto;font-size:12px;color:#8b9cb1}.side-foot small{display:block;font-size:10px;margin-top:10px}main{margin-left:220px;padding:28px 40px;max-width:1700px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;gap:15px}header small{display:block;font-size:11px;margin-top:3px}.account{display:flex;gap:10px}.hero{background:linear-gradient(115deg,#e4efff,#f4f8ff 65%,#e3efff);border:1px solid white;border-radius:22px;padding:32px 36px;display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:26px}.hero p{color:#7088a5;margin:0}.eyebrow{letter-spacing:2px;font-size:10px;color:#5c88bd;margin-bottom:12px!important}.hero-art{font-size:65px;color:#88b3eb;transform:rotate(-8deg);padding:0 28px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:24px 0}.stat,.card,.panel{background:#fff;border:1px solid var(--line);border-radius:15px;padding:23px}.stat strong{display:block;font-size:31px;font-weight:600;margin-top:8px}.stat small{font-size:12px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:27px 0 16px}.section-head h2{margin:0}.section-head p{color:var(--muted);font-size:12px;margin:4px 0 0}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card h3{margin:12px 0 6px}.card p{color:var(--muted);font-size:12px}.card .actions{border-top:1px solid var(--line);padding-top:16px;margin-top:19px;display:flex;gap:8px;flex-wrap:wrap}.tag{font-size:11px;background:#edf4ff;color:#4982ca;border-radius:6px;padding:4px 9px;display:inline-block}.tag.green{background:#edf8f4;color:#368b73}.empty{text-align:center;padding:55px 20px;background:#ffffff88;border:1px dashed #ccdced;border-radius:16px;color:var(--muted)}.empty h3{color:#526d8d}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:14px}table{width:100%;border-collapse:collapse;white-space:nowrap}th,td{text-align:left;padding:15px 19px;border-bottom:1px solid #edf1f6;font-size:13px}th{background:#f8faff;font-weight:500;color:#7a8da4}tr:last-child td{border:0}.tools{display:flex;gap:10px;flex-wrap:wrap}.muted{color:var(--muted)}footer{display:flex;justify-content:space-between;font-size:10px;color:#93a4b9;margin-top:45px}.login-card{width:min(470px,calc(100% - 32px));padding:40px;background:white;border:1px solid var(--line);border-radius:24px;box-shadow:0 20px 70px #1d539415}.login-card h1{font-size:36px;line-height:1.5;margin:20px 0}.login-card p{color:#8193a9}.login-card .eyebrow{margin-top:24px}#login{min-height:100vh;display:grid;place-items:center;background:radial-gradient(at 15% 20%,#dceaff,transparent 60%)}[hidden]{display:none!important}label{display:block;font-size:12px;color:#7186a0;margin:14px 0}label input,label textarea,label select{display:block;width:100%;margin-top:6px}form .primary{margin-top:14px}#login-form button{width:100%}dialog{border:1px solid var(--line);border-radius:20px;width:min(660px,calc(100vw - 28px));padding:28px;max-height:90vh;color:var(--ink);box-shadow:0 30px 100px #193c6433}dialog::backdrop{background:#17395b55;backdrop-filter:blur(4px)}.dialog-head{display:flex;justify-content:space-between;align-items:center}.dialog-head h2{margin:0}.dialog-head button{border:0;font-size:24px;padding:0 10px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:0 15px}.fields .wide{grid-column:1/-1}.checklist{display:grid;grid-template-columns:1fr 1fr;gap:3px;max-height:200px;overflow:auto}.checklist label{display:flex;align-items:center;gap:8px;margin:5px}.checklist input{width:auto;margin:0}.attendance-row{display:flex;justify-content:space-between;gap:10px;padding:12px 0;border-bottom:1px solid var(--line)}.photos{display:flex;gap:10px;flex-wrap:wrap;margin:15px 0}.photos img{width:110px;height:110px;object-fit:cover;border-radius:9px}.review-text{white-space:pre-wrap;color:#526980}.notice{border-radius:10px;background:#eef4fd;padding:12px 16px;font-size:12px;color:#6e86a4}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#1a3e65;color:white;padding:12px 24px;border-radius:12px;display:none;z-index:5}button:disabled{opacity:.5;cursor:wait}@media(max-width:1050px){main{padding:24px;margin-left:190px}aside{width:190px;padding:25px 15px}.grid{grid-template-columns:repeat(2,1fr)}.stats{gap:10px}.stat{padding:16px}}@media(max-width:700px){aside{position:static;width:auto;padding:18px}.brand{font-size:17px}.nav-label,.side-foot{display:none}nav{display:flex;overflow:auto;margin-top:15px;gap:4px}nav button{white-space:nowrap;padding:9px 13px}main{margin:0;padding:18px}header{align-items:flex-start}.account{gap:5px}.account select{max-width:145px}.hero{padding:24px}.hero h1{font-size:24px}.hero-art{display:none}.stats{grid-template-columns:repeat(2,1fr)}.grid{grid-template-columns:1fr}.section-head{align-items:flex-start;flex-wrap:wrap}.fields{grid-template-columns:1fr}.fields .wide{grid-column:auto}footer span{display:none}.login-card{padding:28px}.attendance-row{flex-wrap:wrap}}

.lesson-filters{background:white;border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin-top:18px}.filter-row{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:8px 0}.filter-label{width:40px;color:var(--muted);font-size:12px;flex-shrink:0}.filter-chip{font-size:12px;padding:7px 12px;border-color:transparent;background:#f6f8fc;overflow-wrap:anywhere;text-align:left}.filter-chip.selected{background:#e7f0ff;border-color:#b9d4fb;color:#216bd0;font-weight:600}.filter-summary{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:10px;padding-top:12px;font-size:12px;color:var(--muted)}.filter-summary button{border:0;padding:3px 8px;color:#397bcc}#lesson-list>.empty{grid-column:1/-1}@media(max-width:700px){.lesson-filters{padding:12px}.filter-label{width:100%}.filter-chip{max-width:100%}}