*{box-sizing:border-box;margin:0;padding:0}body{color:#111827;background:#fff;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}.container{max-width:1100px;margin:0 auto;padding:0 24px}.navbar{border-bottom:1px solid #e5e7eb;padding:16px 0}.navbar .container{justify-content:space-between;align-items:center;display:flex}.logo{color:#4f46e5;font-size:20px;font-weight:700}.nav-links{align-items:center;gap:24px;display:flex}.nav-links a{color:#6b7280;font-size:14px}.nav-links a:hover{color:#111827}.btn{cursor:pointer;border:none;border-radius:8px;padding:10px 20px;font-size:14px;font-weight:500;transition:all .2s;display:inline-block}.btn-primary{color:#fff;background:#4f46e5}.btn-primary:hover{background:#4338ca}.btn-secondary{color:#374151;background:#f3f4f6}.btn-secondary:hover{background:#e5e7eb}.hero{text-align:center;padding:80px 0}.hero h1{color:#111827;margin-bottom:20px;font-size:48px;font-weight:700;line-height:1.2}.hero p{color:#6b7280;max-width:600px;margin:0 auto 32px;font-size:18px}.hero-buttons{justify-content:center;gap:16px;display:flex}.stats{background:#f9fafb;padding:60px 0}.stats-grid{text-align:center;grid-template-columns:repeat(4,1fr);gap:32px;display:grid}.stat-item h3{color:#4f46e5;margin-bottom:8px;font-size:36px;font-weight:700}.stat-item p{color:#6b7280;font-size:14px}.features{padding:80px 0}.section-title{text-align:center;margin-bottom:48px}.section-title h2{color:#111827;margin-bottom:12px;font-size:32px;font-weight:700}.section-title p{color:#6b7280;font-size:16px}.features-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.feature-card{border:1px solid #e5e7eb;border-radius:12px;padding:32px;transition:box-shadow .2s}.feature-card:hover{box-shadow:0 4px 12px #00000014}.feature-icon{background:#eef2ff;border-radius:10px;justify-content:center;align-items:center;width:48px;height:48px;margin-bottom:20px;font-size:24px;display:flex}.feature-card h3{color:#111827;margin-bottom:8px;font-size:18px;font-weight:600}.feature-card p{color:#6b7280;font-size:14px}.cta{text-align:center;background:#4f46e5;padding:80px 0}.cta h2{color:#fff;margin-bottom:16px;font-size:32px;font-weight:700}.cta p{color:#c7d2fe;margin-bottom:32px;font-size:16px}.cta .btn{color:#4f46e5;background:#fff}.cta .btn:hover{background:#f3f4f6}.footer{border-top:1px solid #e5e7eb;padding:32px 0}.footer .container{justify-content:space-between;align-items:center;display:flex}.footer-links{gap:24px;display:flex}.footer-links a{color:#6b7280;font-size:14px}.footer-links a:hover{color:#111827}.copyright{color:#9ca3af;font-size:14px}.auth-page{background:#f9fafb;justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.auth-card{background:#fff;border-radius:16px;width:100%;max-width:400px;padding:48px;box-shadow:0 4px 24px #0000000f}.auth-card h1{text-align:center;margin-bottom:8px;font-size:24px;font-weight:700}.auth-card .subtitle{color:#6b7280;text-align:center;margin-bottom:32px}.form-group{margin-bottom:20px}.form-group label{color:#374151;margin-bottom:6px;font-size:14px;font-weight:500;display:block}.form-group input{border:1px solid #d1d5db;border-radius:8px;outline:none;width:100%;padding:12px 16px;font-size:14px;transition:border-color .2s}.form-group input:focus{border-color:#4f46e5}.auth-card .btn{width:100%;padding:14px;font-size:16px}.auth-footer{text-align:center;color:#6b7280;margin-top:24px;font-size:14px}.auth-footer a{color:#4f46e5}.error-msg{color:#dc2626;background:#fef2f2;border-radius:8px;margin-bottom:20px;padding:12px;font-size:14px}.dashboard{min-height:100vh;display:flex}.sidebar{background:#fff;border-right:1px solid #e5e7eb;width:240px;padding:24px 16px}.sidebar-logo{color:#4f46e5;margin-bottom:32px;padding:0 8px;font-size:18px;font-weight:700}.sidebar-nav a{color:#6b7280;border-radius:8px;align-items:center;gap:12px;margin-bottom:4px;padding:12px;font-size:14px;display:flex}.sidebar-nav a:hover,.sidebar-nav a.active{color:#111827;background:#f3f4f6}.main-content{background:#f9fafb;flex:1;padding:32px}.page-header{margin-bottom:32px}.page-header h1{color:#111827;font-size:24px;font-weight:700}.page-header p{color:#6b7280;font-size:14px}.dashboard-stats{grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:32px;display:grid}.dashboard-stat{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:24px}.dashboard-stat h3{color:#111827;margin-bottom:4px;font-size:28px;font-weight:700}.dashboard-stat p{color:#6b7280;font-size:14px}.groups-grid{grid-template-columns:repeat(2,1fr);gap:16px;display:grid}.group-card{cursor:pointer;background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:20px;transition:box-shadow .2s}.group-card:hover{box-shadow:0 4px 12px #0000000f}.group-card h3{color:#111827;margin-bottom:4px;font-size:16px;font-weight:600}.group-card p{color:#6b7280;font-size:13px}@media (max-width:768px){.stats-grid,.features-grid,.dashboard-stats{grid-template-columns:1fr 1fr}.hero h1{font-size:32px}.groups-grid{grid-template-columns:1fr}}