:root{--primary: #4f46e5;--primary-l: #6366f1;--primary-d: #3730a3;--accent: #06b6d4;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--bg: #f1f5f9;--surface: #ffffff;--surface-alt:#f8fafc;--text: #1e293b;--text-muted: #64748b;--text-light: #94a3b8;--border: #e2e8f0;--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow: 0 4px 6px -1px rgba(0,0,0,.07);--shadow-lg: 0 10px 25px -5px rgba(0,0,0,.08);--radius: 12px;--radius-sm: 8px;--radius-xs: 6px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6}.auth-page{min-height:100vh;background:linear-gradient(135deg,#1e1b4b,#312e81 40%,#1e293b);display:flex;align-items:center;justify-content:center}.auth-card{background:var(--surface);border-radius:16px;padding:40px 36px;width:400px;max-width:94vw;box-shadow:0 25px 50px -12px #0006}.auth-card h1{text-align:center;font-size:1.5rem;color:var(--primary-d);margin-bottom:4px}.auth-card p{text-align:center;color:var(--text-muted);margin-bottom:20px;font-size:.9rem}.auth-card label{display:block;font-size:.85rem;font-weight:600;margin-bottom:3px}.auth-card input{width:100%;padding:10px 14px;border:2px solid var(--border);border-radius:var(--radius-xs);font-size:.95rem;margin-bottom:12px;outline:none;transition:border .2s}.auth-card input:focus{border-color:var(--primary)}.auth-error{color:var(--danger);font-size:.82rem;text-align:center;min-height:18px;margin-bottom:4px}.app-layout{display:flex;flex-direction:column;min-height:100vh}.navbar{background:var(--surface);border-bottom:1px solid var(--border);padding:0 24px;height:60px;display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:100}.navbar .logo{font-size:1.2rem;font-weight:700;color:var(--primary)}.navbar nav{display:flex;gap:4px}.navbar nav a{padding:8px 16px;border-radius:var(--radius-xs);text-decoration:none;color:var(--text-muted);font-size:.9rem;font-weight:500;transition:all .2s}.navbar nav a:hover{background:#f1f5f9;color:var(--text)}.navbar nav a.active{background:#eef2ff;color:var(--primary)}.navbar .user-bar{display:flex;align-items:center;gap:12px}.navbar .user-bar span{color:var(--text-muted);font-size:.85rem}.main-content{max-width:1100px;width:100%;margin:0 auto;padding:24px}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:12px;color:var(--text-muted)}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.card{background:var(--surface);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow);margin-bottom:20px}.card h2{font-size:1.1rem;margin-bottom:14px}.btn{padding:9px 18px;border:none;border-radius:var(--radius-xs);font-size:.88rem;font-weight:600;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:6px;font-family:inherit}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-d)}.btn-accent{background:var(--accent);color:#fff}.btn-accent:hover:not(:disabled){opacity:.9}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){opacity:.9}.btn-danger{background:#fef2f2;color:var(--danger)}.btn-danger:hover:not(:disabled){background:#fee2e2}.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}.btn-outline:hover:not(:disabled){background:#eef2ff}.btn-sm{padding:5px 12px;font-size:.78rem}.btn-ghost{background:transparent;color:var(--primary)}.btn-ghost:hover{background:#eef2ff}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:10px}.form-group{display:flex;flex-direction:column}.form-group label{font-size:.82rem;font-weight:600;margin-bottom:2px;color:var(--text-muted)}.form-group input,.form-group select,.form-group textarea{padding:9px 12px;border:2px solid var(--border);border-radius:var(--radius-xs);font-size:.9rem;outline:none;transition:border .2s;font-family:inherit}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--primary)}.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:20px}.stat-card{background:var(--surface);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);text-align:center}.stat-card .value{font-size:1.6rem;font-weight:700;color:var(--primary)}.stat-card .label{font-size:.8rem;color:var(--text-muted)}.task-item{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:8px;background:var(--surface-alt);transition:all .2s}.task-item:hover{box-shadow:var(--shadow-sm)}.task-priority{width:7px;height:32px;border-radius:4px;flex-shrink:0}.task-priority.high{background:var(--danger)}.task-priority.medium{background:var(--warning)}.task-priority.low{background:var(--success)}.task-info{flex:1;min-width:0}.task-info .name{font-weight:600}.task-info .meta{font-size:.78rem;color:var(--text-muted)}.task-actions{display:flex;gap:6px;flex-shrink:0}.timetable{position:relative;padding-left:70px;border-left:3px solid var(--primary);margin-top:8px}.time-slot{position:relative;margin-bottom:8px;padding:12px 14px;border-radius:var(--radius-sm);border:1px solid var(--border);transition:transform .15s}.time-slot:hover{transform:translate(4px)}.time-slot.break{background:#f8fafc;border-style:dashed}.time-slot.study-high{background:#fef2f2;border-left:4px solid var(--danger)}.time-slot.study-medium{background:#fffbeb;border-left:4px solid var(--warning)}.time-slot.study-low{background:#f0fdf4;border-left:4px solid var(--success)}.time-label{position:absolute;left:-73px;font-size:.78rem;font-weight:600;color:var(--text-muted);white-space:nowrap}.slot-subject{font-weight:600}.slot-desc{font-size:.8rem;color:var(--text-muted);margin-top:2px}.resource-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}.resource-card{padding:16px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-alt);transition:all .2s}.resource-card:hover{box-shadow:var(--shadow)}.resource-card h3{font-size:.92rem;margin-bottom:4px}.resource-card .task-tag{display:inline-block;font-size:.7rem;font-weight:600;padding:2px 8px;border-radius:12px;margin-bottom:6px;background:#eef2ff;color:var(--primary)}.resource-links{list-style:none;margin-top:4px}.resource-links li{margin-bottom:3px}.resource-links a{color:var(--primary);font-size:.85rem;text-decoration:none}.resource-links a:hover{text-decoration:underline}.empty-state{text-align:center;padding:30px;color:var(--text-light)}.empty-state .icon{font-size:2.5rem;margin-bottom:6px}@media (max-width: 700px){.navbar{flex-wrap:wrap;height:auto;padding:10px 14px;gap:8px}.navbar nav{order:3;width:100%;justify-content:center}.form-row{grid-template-columns:1fr}.main-content{padding:14px}.resource-grid{grid-template-columns:1fr}}