:root{--bg:#f4f6fb;--surface:#ffffff;--ink:#1a2332;--muted:#6b7590;--line:#e6eaf2;--accent:#3b5bdb;--accent-d:#2f47b5;--ba:#2f6b5e;--pu:#5a4fcf;--sa:#d97706;--str:#db2777;--danger:#b42318;--ok:#087443;--shadow:0 10px 30px rgba(23,32,70,.06)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:linear-gradient(180deg,#eef2fb 0%,var(--bg) 320px);color:var(--ink);font-family:Segoe UI,system-ui,-apple-system,Roboto,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased;min-height:100vh}button{font-family:inherit}a{color:var(--accent)}.wrap{max-width:1200px;margin:0 auto;padding:0 24px}header{color:#fff;padding:22px 0 20px;position:relative;overflow:hidden;background:radial-gradient(900px 340px at 12% -10%,rgba(255,255,255,.14),transparent 60%),radial-gradient(700px 300px at 95% 5%,rgba(255,255,255,.1),transparent 55%),linear-gradient(120deg,#1f2f8f,#3b5bdb 45%,#2f6b5e 110%)}header .wrap{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.brand h1{font-size:19px;font-weight:700;letter-spacing:-.01em}.brand p{margin-top:3px;font-size:13px;color:#ffffffd9}.logout{border:1px solid rgba(255,255,255,.3);background:#ffffff1f;color:#fff;border-radius:10px;padding:8px 14px;font-size:13.5px;font-weight:600;cursor:pointer;transition:.16s}.logout:hover{background:#ffffff38}.tabbar{background:#fafbfef0;-webkit-backdrop-filter:saturate(180%) blur(10px);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}.tabbar .wrap{display:flex;gap:6px;align-items:center;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}.tab{border:none;background:transparent;color:var(--muted);font-weight:700;font-size:14.5px;padding:10px 16px;border-radius:10px;cursor:pointer;transition:.16s;display:inline-flex;align-items:center;gap:8px}.tab:hover{color:var(--ink);background:#eef2fb}.tab.on{color:#fff;background:var(--accent)}.tab .cnt{font-size:12px;font-weight:700;background:#00000014;border-radius:999px;padding:1px 8px}.tab.on .cnt{background:#ffffff40}.filters{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:20px auto 0}.pill{display:inline-flex;align-items:center;gap:7px;border:1.5px solid var(--line);background:#fff;color:var(--muted);font-weight:600;font-size:13.5px;padding:7px 13px;border-radius:999px;cursor:pointer;transition:.16s;-webkit-user-select:none;user-select:none}.pill:hover{border-color:#c8d0e0;color:var(--ink)}.pill .dot{width:9px;height:9px;border-radius:50%;background:currentColor;opacity:.55}.pill.on{color:#fff;border-color:transparent}.pill.on .dot{opacity:1;background:#fff}.search{position:relative;flex:1 1 220px;max-width:340px;margin-left:auto}.search input{width:100%;border:1.5px solid var(--line);background:#fff;border-radius:11px;padding:9px 14px;font-size:14px;color:var(--ink);outline:none;transition:.16s}.search input:focus{border-color:#aab4ff;box-shadow:0 0 0 3px #3b5bdb1f}main{padding:8px 0 80px}.month{margin-top:22px}.month-h{display:flex;align-items:center;gap:10px;cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--accent);font-weight:800;font-size:13px;text-transform:uppercase;letter-spacing:.06em;padding:8px 2px}.month-h .caret{width:20px;height:20px;display:grid;place-items:center;border-radius:6px;background:#fff;border:1px solid var(--line);color:var(--accent);font-weight:800;font-size:14px;line-height:1}.month-h .mc{color:var(--muted);font-weight:600;letter-spacing:0;text-transform:none;font-size:12.5px}.day{background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden;margin-top:12px}.day-head{display:flex;align-items:baseline;gap:10px;padding:12px 18px;background:#fafbfe;border-bottom:1px solid var(--line)}.day-date{font-weight:800;color:var(--accent);font-size:15px}.day-time{font-size:12px;color:var(--muted);font-weight:600}.lesson{display:flex;gap:14px;padding:14px 18px;border-bottom:1px solid var(--line);align-items:flex-start}.lesson:last-child{border-bottom:none}.lesson:hover{background:#f7f9ff}.dbadge{flex:none;width:34px;height:34px;border-radius:9px;display:grid;place-items:center;color:#fff;font-size:11px;font-weight:800;margin-top:2px}.lesson-body{flex:1;min-width:0}.lesson-topic{font-size:14.5px;font-weight:600;line-height:1.4}.lesson-meta{margin-top:4px;font-size:12.5px;color:var(--muted);display:flex;gap:12px;flex-wrap:wrap}.fmt-tag{font-size:11px;font-weight:700;padding:1px 8px;border-radius:999px;background:#eef1f8;color:var(--muted)}.fmt-tag.live{background:#ecfdf3;color:#087443}.lesson-hws{margin-top:10px;display:flex;flex-direction:column;gap:8px}.hw-chip{display:flex;align-items:center;gap:10px;background:#f7f9ff;border:1px solid var(--line);border-radius:10px;padding:8px 12px;cursor:pointer;transition:.14s}.hw-chip:hover{border-color:#c8d0e0;background:#eef3ff}.hw-chip .st-dot{width:9px;height:9px;border-radius:50%;flex:none}.hw-chip .hc-title{font-size:13px;font-weight:600;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.hw-chip .hc-dl{font-size:11.5px;color:var(--muted);white-space:nowrap}.lesson-actions{flex:none}.add-hw{border:1.5px dashed var(--line);background:#fff;color:var(--accent);font-weight:700;font-size:12.5px;border-radius:9px;padding:7px 11px;cursor:pointer;transition:.14s;white-space:nowrap}.add-hw:hover{border-color:var(--accent);background:#f2f5ff}.hw-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:16px;margin-top:20px}.hw-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden}.hw-card.over{border-color:#f5c2bd}.hw-top{padding:15px 17px 12px;border-bottom:1px solid var(--line)}.hw-top-row{display:flex;align-items:center;gap:8px;margin-bottom:9px;flex-wrap:wrap}.chip-disc{font-size:11px;font-weight:800;color:#fff;border-radius:7px;padding:2px 8px}.chip-status{font-size:11.5px;font-weight:700;border-radius:999px;padding:3px 10px}.hw-title{font-size:15.5px;font-weight:700;line-height:1.35;letter-spacing:-.01em}.hw-lesson{margin-top:6px;font-size:12px;color:var(--muted);line-height:1.4}.hw-body{padding:13px 17px;flex:1}.hw-desc{font-size:13.5px;color:#3a4358;line-height:1.55;white-space:pre-wrap;word-break:break-word}.hw-desc.empty{color:var(--muted);font-style:italic}.hw-dl{margin-top:12px;font-size:12.5px;font-weight:700;display:inline-flex;align-items:center;gap:7px}.hw-dl.over{color:var(--danger)}.hw-dl.soon{color:var(--sa)}.hw-dl.ok{color:var(--muted)}.hw-dl.none{color:var(--muted);font-weight:600}.files{margin-top:14px}.files-h{font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin-bottom:7px}.file{display:flex;align-items:center;gap:9px;padding:7px 10px;border:1px solid var(--line);border-radius:9px;background:#fafbfe;margin-bottom:6px}.file .fi{width:26px;height:26px;border-radius:7px;background:#eef1f8;display:grid;place-items:center;flex:none;font-size:11px;font-weight:800;color:var(--accent)}.file a{flex:1;min-width:0;font-size:13px;font-weight:600;text-decoration:none;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file a:hover{color:var(--accent)}.file .fs{font-size:11px;color:var(--muted);white-space:nowrap}.file .del{border:none;background:transparent;color:var(--muted);cursor:pointer;font-size:15px;line-height:1;padding:2px 4px;border-radius:6px}.file .del:hover{color:var(--danger);background:#fef3f2}.upload-btn{display:inline-flex;align-items:center;gap:7px;border:1.5px dashed var(--line);background:#fff;color:var(--accent);font-weight:700;font-size:12.5px;border-radius:9px;padding:8px 12px;cursor:pointer;transition:.14s;margin-top:2px}.upload-btn:hover{border-color:var(--accent);background:#f2f5ff}.upload-btn.busy{opacity:.6;pointer-events:none}.hw-foot{display:flex;align-items:center;gap:8px;padding:12px 17px;border-top:1px solid var(--line);background:#fafbfe;flex-wrap:wrap}.status-seg{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}.status-seg button{border:none;background:#fff;color:var(--muted);font-size:12px;font-weight:700;padding:7px 11px;cursor:pointer;transition:.14s;border-right:1px solid var(--line)}.status-seg button:last-child{border-right:none}.status-seg button.on{color:#fff}.btn-ghost{margin-left:auto;border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:9px;padding:7px 11px;font-size:12.5px;font-weight:700;cursor:pointer;transition:.14s}.btn-ghost:hover{color:var(--ink);border-color:#c8d0e0}.btn-ghost.danger:hover{color:var(--danger);border-color:#f5c2bd;background:#fef3f2}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(1000px 500px at 50% -10%,rgba(59,91,219,.14),transparent 60%)}.login-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:0 24px 60px #141c3429;width:100%;max-width:400px;padding:34px 32px}.login-card .lock{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;color:#fff;margin-bottom:16px;background:linear-gradient(135deg,#2f6b5e,#3b5bdb)}.login-card h2{font-size:20px;font-weight:700;letter-spacing:-.01em}.login-card p{margin-top:6px;color:var(--muted);font-size:13.5px}.login-card form{margin-top:20px;display:flex;flex-direction:column;gap:12px}.field{position:relative}.field input{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:12px 44px 12px 14px;font-size:15px;outline:none;transition:.16s}.field input:focus{border-color:#aab4ff;box-shadow:0 0 0 3px #3b5bdb1f}.field .eye{position:absolute;right:8px;top:50%;transform:translateY(-50%);border:none;background:transparent;cursor:pointer;color:var(--muted);padding:6px;font-size:13px}.btn-primary{border:none;background:var(--accent);color:#fff;border-radius:12px;padding:12px 16px;font-size:15px;font-weight:700;cursor:pointer;transition:.16s}.btn-primary:hover{background:var(--accent-d)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.login-err{background:#fef3f2;border:1px solid #f5c2bd;color:var(--danger);border-radius:10px;padding:10px 12px;font-size:13px;font-weight:600}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;background:#18203470;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);display:flex;align-items:center;justify-content:center;padding:20px;animation:fade .16s ease}@keyframes fade{0%{opacity:0}to{opacity:1}}.modal{background:var(--surface);border-radius:18px;max-width:560px;width:100%;max-height:90vh;overflow:auto;box-shadow:0 24px 60px #141c3447}.modal-h{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--line)}.modal-h h3{font-size:17px;font-weight:700}.modal-h .x{border:none;background:transparent;font-size:20px;color:var(--muted);cursor:pointer;line-height:1;padding:4px;border-radius:8px}.modal-h .x:hover{color:var(--ink);background:#eef2fb}.modal-b{padding:20px 22px;display:flex;flex-direction:column;gap:14px}.lbl{font-size:12.5px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.03em;margin-bottom:6px;display:block}.inp,.ta{width:100%;border:1.5px solid var(--line);border-radius:11px;padding:11px 13px;font-size:14.5px;font-family:inherit;outline:none;transition:.16s}.inp:focus,.ta:focus{border-color:#aab4ff;box-shadow:0 0 0 3px #3b5bdb1f}.ta{resize:vertical;min-height:110px;line-height:1.55}.lesson-ref{background:#f7f9ff;border:1px solid var(--line);border-radius:11px;padding:11px 13px;font-size:13px;color:var(--muted)}.lesson-ref b{color:var(--ink)}.modal-f{display:flex;gap:10px;padding:16px 22px;border-top:1px solid var(--line)}.modal-f .btn-primary{flex:1}.modal-f .btn-ghost{margin-left:0}.state{text-align:center;color:var(--muted);padding:60px 20px;font-size:15px;background:#fff;border:1px solid var(--line);border-radius:16px;margin-top:22px}.spinner{width:34px;height:34px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;margin:40px auto;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%);z-index:80;background:var(--ink);color:#fff;padding:11px 18px;border-radius:12px;font-size:13.5px;font-weight:600;box-shadow:0 10px 30px #00000040;animation:fade .16s ease}.toast.err{background:var(--danger)}@media (max-width:600px){.wrap{padding:0 14px}.hw-grid{grid-template-columns:1fr}.brand h1{font-size:16px}.lesson{flex-wrap:wrap}.lesson-actions,.add-hw{width:100%}}