:root{--primary: #4f46e5;--primary-hover: #4338ca;--bg-color: #f3f4f6;--card-bg: #ffffff;--text-main: #1f2937;--text-muted: #6b7280;--danger: #ef4444;--success: #10b981;--radius: 12px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}*{box-sizing:border-box;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body{background-color:var(--bg-color);color:var(--text-main);line-height:1.5}.container{max-width:1000px;margin:0 auto;padding:20px}.auth-container{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2)}.card{background:var(--card-bg);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow);width:100%;max-width:400px;transition:transform .2s}.video-card{background:var(--card-bg);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px}.video-card:hover{transform:translateY(-3px);box-shadow:0 10px 15px -3px #0000001a}h2{margin-bottom:1.5rem;text-align:center;color:var(--text-main)}label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-main)}input,select{width:100%;padding:.6rem;border:1px solid #d1d5db;border-radius:8px;margin-bottom:.8rem;font-size:.95rem;transition:border-color .2s}input:focus,select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e533}button{width:100%;padding:.75rem;background-color:var(--primary);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .2s}button:hover{background-color:var(--primary-hover)}button:disabled{background-color:#9ca3af;cursor:not-allowed}.btn-secondary{background-color:transparent;color:var(--text-muted);border:1px solid #d1d5db;margin-top:10px}.btn-secondary:hover{background-color:#f9fafb;color:var(--text-main)}.btn-logout{width:auto;background-color:transparent;border:1px solid #e5e7eb;color:var(--text-muted);padding:.5rem 1rem}.btn-logout:hover{background-color:#fee2e2;color:var(--danger);border-color:#fecaca}.progress-container{width:100%;background-color:#e5e7eb;border-radius:99px;height:10px;overflow:hidden;margin-top:10px}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary) 0%,#818cf8 100%);transition:width .4s ease}.grid-layout{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-top:20px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;border-bottom:1px solid #e5e7eb}.modal-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background-color:#000000b3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;justify-content:center;align-items:center;z-index:9999;animation:fadeIn .2s ease-in-out}.modal-content{background:#1f2937;padding:0;border-radius:16px;width:90%;max-width:900px;overflow:hidden;box-shadow:0 25px 50px -12px #00000080;display:flex;flex-direction:column;position:relative;animation:scaleUp .3s cubic-bezier(.16,1,.3,1)}.modal-header{padding:15px 20px;display:flex;justify-content:space-between;align-items:center;background:#111827;border-bottom:1px solid #374151;color:#fff}.modal-body{background:#000;width:100%;display:flex;justify-content:center;align-items:center}.close-btn{background:#ffffff1a;border:none;color:#fff;width:32px;height:32px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.close-btn:hover{background:#fff3}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleUp{0%{transform:scale(.95);opacity:0}to{transform:scale(1);opacity:1}}