:root{--bg:#f4f7fb;--panel:#fff;--text:#172033;--muted:#6b7280;--line:#e5e7eb;--primary:#3558e8;--primary2:#233fc0;--sidebar:#10182b;--danger:#c0392b;--success:#19764a;--warning:#9a6700;--shadow:0 10px 30px rgba(16,24,43,.07)}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);font-size:14px}.app-shell{display:flex;min-height:100vh}.sidebar{width:255px;background:var(--sidebar);color:#fff;position:fixed;inset:0 auto 0 0;padding:22px 16px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:#fff;color:var(--sidebar);font-weight:900}.brand strong{display:block;font-size:16px}.brand span{display:block;font-size:11px;color:#9aa7c2;margin-top:2px}.sidebar nav{display:flex;flex-direction:column;gap:5px;margin-top:28px;overflow:auto}.nav-link{display:flex;gap:11px;align-items:center;padding:11px 12px;border-radius:9px;color:#c8d1e5;text-decoration:none;font-weight:650}.nav-link:hover,.nav-link.active{background:#1c2a49;color:#fff}.nav-link span{width:20px;text-align:center}.sidebar-footer{margin-top:auto;padding:14px 12px;border-top:1px solid rgba(255,255,255,.1);display:grid;gap:3px}.sidebar-footer small{color:#8898b8}.sidebar-footer a{color:#ff8e8e;text-decoration:none;margin-top:8px}.main{margin-left:255px;min-width:0;flex:1}.topbar{height:86px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 28px;gap:14px;position:sticky;top:0;z-index:10}.topbar h1{font-size:22px;margin:0}.topbar p{margin:3px 0 0;color:var(--muted);font-size:12px}.menu-btn{display:none;border:0;background:transparent;font-size:24px}.content{padding:26px;max-width:1600px;margin:auto}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:20px}.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.stat-label{color:var(--muted);font-weight:650;font-size:12px}.stat-value{font-size:28px;font-weight:850;margin:8px 0 2px}.stat-note{font-size:12px;color:var(--muted)}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.section-head{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:14px}.section-head h2,.card h2{margin:0;font-size:17px}.muted{color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid var(--line);background:#fff;padding:9px 13px;border-radius:9px;color:var(--text);text-decoration:none;font-weight:700;cursor:pointer}.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary2)}.btn.danger{background:#fff5f4;color:var(--danger);border-color:#f3c4be}.btn.small{padding:6px 9px;font-size:12px}.btn.full{width:100%}.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.toolbar input,.toolbar select{max-width:260px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px;background:#fff}table{width:100%;border-collapse:collapse;min-width:760px}th,td{padding:12px 13px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:11px;text-transform:uppercase;letter-spacing:.045em;color:#687186;background:#fafbfc}tbody tr:hover{background:#fbfcff}tbody tr:last-child td{border-bottom:0}a.link{color:var(--primary);text-decoration:none;font-weight:750}.badge{display:inline-flex;padding:4px 8px;border-radius:999px;background:#eef1f6;color:#4b5563;font-size:11px;font-weight:800;text-transform:capitalize}.badge.success{background:#e9f8f0;color:var(--success)}.badge.warning{background:#fff6d8;color:var(--warning)}.badge.danger{background:#fdeceb;color:var(--danger)}.badge.info{background:#edf2ff;color:#3150c8}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-grid.single{grid-template-columns:1fr}.form-grid .full{grid-column:1/-1}label{font-weight:700;font-size:12px;color:#465066;display:grid;gap:7px}input,select,textarea{width:100%;border:1px solid #d7dce5;border-radius:8px;padding:10px 11px;font:inherit;color:var(--text);background:#fff}textarea{min-height:100px;resize:vertical}input:focus,select:focus,textarea:focus{outline:2px solid rgba(53,88,232,.14);border-color:#8094ef}.alert{padding:11px 13px;border-radius:9px;margin-bottom:14px;border:1px solid}.alert.success{background:#ecfaf2;border-color:#bde8cf;color:#13643d}.alert.error{background:#fff1ef;border-color:#f2c2bb;color:#9f3024}.alert.warning{background:#fff9e5;border-color:#eedc95;color:#795500}.empty{padding:28px;color:var(--muted);text-align:center}.tabs{display:flex;gap:5px;overflow:auto;border-bottom:1px solid var(--line);margin-bottom:18px}.tabs a{padding:10px 12px;text-decoration:none;color:var(--muted);font-weight:750;white-space:nowrap;border-bottom:2px solid transparent}.tabs a.active{color:var(--primary);border-color:var(--primary)}.kv{display:grid;grid-template-columns:160px 1fr;gap:8px 14px}.kv dt{color:var(--muted)}.kv dd{margin:0;font-weight:650}.timeline{display:grid;gap:0}.timeline-item{display:grid;grid-template-columns:18px 1fr;gap:12px;padding:0 0 18px}.timeline-dot{width:10px;height:10px;border-radius:50%;background:var(--primary);margin-top:5px;position:relative}.timeline-dot:after{content:"";position:absolute;width:2px;height:35px;background:#dce2f3;left:4px;top:10px}.timeline-item:last-child .timeline-dot:after{display:none}.timeline-item p{margin:0 0 4px}.timeline-item small{color:var(--muted)}.auth-body{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#edf2ff,#f8fafc);padding:25px}.auth-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;width:min(430px,100%);box-shadow:0 25px 70px rgba(16,24,43,.12)}.setup-card{width:min(560px,100%)}.auth-brand{margin-bottom:26px}.auth-card h2{margin:0 0 7px}.auth-card hr{border:0;border-top:1px solid var(--line);width:100%;margin:5px 0}.actions{display:flex;gap:7px;flex-wrap:wrap}.metric-line{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line)}.metric-line:last-child{border-bottom:0}.low-hours{font-weight:850;color:var(--danger)}.calendar-day{padding:13px;border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:10px}.calendar-day h3{font-size:14px;margin:0 0 10px}.class-row{display:grid;grid-template-columns:100px 1fr 140px 130px;gap:12px;align-items:center;padding:9px 0;border-top:1px solid var(--line)}.class-row:first-of-type{border-top:0}.nowrap{white-space:nowrap}@media(max-width:1100px){.cards{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:1fr 1fr}}@media(max-width:800px){.sidebar{transform:translateX(-100%);transition:.2s}.menu-open .sidebar{transform:translateX(0)}.main{margin-left:0}.menu-btn{display:block}.content{padding:16px}.topbar{padding:0 16px}.cards,.grid-2,.grid-3{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.class-row{grid-template-columns:1fr}.kv{grid-template-columns:1fr}.toolbar input,.toolbar select{max-width:none;flex:1 1 180px}}