:root{color:#0f172a;font-synthesis:none;text-rendering:optimizelegibility;background:#f8fafc;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{background:#f8fafc;min-width:320px;min-height:100vh;margin:0}button,input,select{font:inherit}.app-shell{grid-template-columns:240px 1fr;min-height:100vh;display:grid}.sidebar{color:#fff;background:#0f172a;flex-direction:column;gap:28px;padding:24px 16px;display:flex}.brand{align-items:center;gap:12px;padding:0 8px;display:flex}.brand-mark{color:#0f172a;background:#fff;border:1px solid #e2e8f0;border-radius:12px;place-items:center;width:38px;height:38px;font-weight:800;display:grid}.brand strong,.brand span{display:block}.brand span{color:#94a3b8;margin-top:2px;font-size:12px}.sidebar nav{gap:6px;display:grid}.sidebar nav button{color:#cbd5e1;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:10px;align-items:center;gap:10px;padding:11px 12px;display:flex}.sidebar nav button:hover,.sidebar nav .nav-active{color:#fff;background:#1e293b}.connection-card{color:#cbd5e1;border:1px solid #334155;border-radius:12px;align-items:center;gap:8px;margin-top:auto;padding:12px;font-size:12px;display:flex}.dot{background:#64748b;border-radius:50%;width:8px;height:8px}.dot.online{background:#22c55e}main{min-width:0;padding:28px}.topbar{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.topbar h1{margin:0;font-size:28px}.topbar p{color:#64748b;margin:4px 0 0}.header-actions{align-items:center;gap:8px;display:flex}.role-pill{text-transform:capitalize;background:#e2e8f0;border-radius:999px;padding:8px 12px;font-size:13px;font-weight:700}.icon-button{cursor:pointer;background:#fff;border:1px solid #cbd5e1;border-radius:10px;place-items:center;width:36px;height:36px;display:grid}.metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:18px;display:grid}.metric,.panel{background:#fff;border:1px solid #e2e8f0;border-radius:16px;box-shadow:0 1px 2px #0f172a0a}.metric{padding:18px}.metric span,.metric small,.class-row span{color:#64748b;display:block}.metric strong{margin:8px 0 4px;font-size:30px;display:block}.metric small{font-size:12px}.panel{padding:18px}.panel-title{justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px;display:flex}.panel-title h2{margin:0;font-size:18px}.panel-title p{color:#64748b;margin:4px 0 0;font-size:13px}.class-list{gap:8px;display:grid}.class-row{text-align:left;cursor:pointer;background:#fff;border:1px solid #e2e8f0;border-radius:12px;grid-template-columns:76px 1fr auto;align-items:center;gap:12px;width:100%;padding:12px;display:grid}.class-row:hover{border-color:#94a3b8}.time-box{font-weight:800}.occupancy{color:#475569;font-size:13px}.calendar-layout{grid-template-columns:minmax(0,2fr) minmax(320px,1fr);gap:18px;display:grid}.week-grid{grid-template-columns:repeat(7,minmax(130px,1fr));gap:10px;padding-bottom:4px;display:grid;overflow-x:auto}.day-column{background:#f8fafc;border-radius:12px;min-height:360px;padding:10px}.day-column h3{color:#475569;margin:0 0 3px;font-size:13px}.day-column>small{color:#94a3b8;margin-bottom:10px;font-size:11px;display:block}.class-card{text-align:left;cursor:pointer;background:#fff;border:1px solid #cbd5e1;border-radius:10px;gap:4px;width:100%;margin-bottom:8px;padding:10px;display:grid}.class-card.selected{border-color:#0f172a;box-shadow:0 0 0 1px #0f172a}.class-card span,.class-card small{color:#64748b;font-size:12px}.roster{gap:8px;display:grid}.student-row{border-bottom:1px solid #e2e8f0;justify-content:space-between;align-items:center;gap:12px;padding:10px 0;display:flex}.student-row:last-child{border-bottom:0}.student-row>div{align-items:center;gap:8px;min-width:0;display:flex}.student-row select{background:#fff;border:1px solid #cbd5e1;border-radius:9px;padding:8px}.status{border-radius:999px;align-items:center;padding:4px 8px;font-size:11px;font-weight:700;display:inline-flex!important}.status.pagado{color:#166534;background:#dcfce7}.status.pendiente{color:#92400e;background:#fef3c7}.status.vencido{color:#991b1b;background:#fee2e2}.search{background:#fff;border:1px solid #cbd5e1;border-radius:10px;align-items:center;gap:8px;padding:8px 10px;display:flex}.search input{border:0;outline:0;min-width:180px}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid #e2e8f0;padding:12px;font-size:13px}th{color:#64748b;font-weight:600}.error-banner{color:#9f1239;background:#fff1f2;border:1px solid #fecaca;border-radius:10px;margin-bottom:14px;padding:10px 12px;font-size:13px}.loading-line{color:#64748b;margin:-12px 0 14px;font-size:12px}.empty-state{color:#64748b;text-align:center;padding:22px 8px;font-size:13px}.auth-shell{background:#f8fafc;place-items:center;min-height:100vh;padding:24px;display:grid}.auth-card{background:#fff;border:1px solid #e2e8f0;border-radius:18px;gap:16px;width:min(100%,390px);padding:26px;display:grid;box-shadow:0 8px 30px #0f172a14}.auth-card .brand-mark{color:#fff;background:#0f172a;border:0}.auth-card h1{margin:0;font-size:26px}.auth-card p{color:#64748b;margin:-10px 0 4px}.auth-card label{gap:6px;font-size:13px;font-weight:700;display:grid}.auth-card input{border:1px solid #cbd5e1;border-radius:10px;outline:0;width:100%;padding:10px 12px}.auth-card input:focus{border-color:#0f172a;box-shadow:0 0 0 2px #0f172a14}.primary-button{color:#fff;cursor:pointer;background:#0f172a;border:0;border-radius:10px;padding:11px 14px;font-weight:700}.primary-button:disabled{opacity:.6;cursor:not-allowed}@media (width<=980px){.app-shell{grid-template-columns:72px 1fr}.sidebar{padding:18px 10px}.brand>div:last-child,.sidebar nav button{font-size:0}.sidebar nav button{justify-content:center}.sidebar nav button svg{width:20px;height:20px}.connection-card{display:none}.metrics{grid-template-columns:repeat(2,1fr)}.calendar-layout{grid-template-columns:1fr}.week-grid{grid-template-columns:repeat(7,160px)}}@media (width<=640px){.app-shell{display:block}.sidebar{z-index:10;background:#0f172a;height:68px;padding:8px;display:block;position:fixed;bottom:0;left:0;right:0}.brand,.connection-card{display:none}.sidebar nav{grid-template-columns:repeat(5,1fr);gap:2px;display:grid}.sidebar nav button{justify-content:center;padding:10px 4px}.sidebar nav button svg{width:21px;height:21px}.sidebar nav button:nth-child(n){display:flex}.sidebar nav button:after{content:""}main{padding:18px 14px 88px}.topbar h1{font-size:24px}.metrics{grid-template-columns:repeat(2,1fr);gap:10px}.metric{padding:14px}.metric strong{font-size:24px}.class-row{grid-template-columns:58px 1fr}.occupancy{display:none}.panel-title{flex-direction:column;align-items:flex-start}.search{width:100%}.search input{width:100%;min-width:0}.week-grid{grid-template-columns:repeat(7,150px)}.student-row{flex-direction:column;align-items:flex-start}.student-row select{width:100%}.header-actions{gap:5px}.role-pill{text-overflow:ellipsis;max-width:140px;overflow:hidden}}