* { margin: 0; padding: 0; box-sizing: border-box; }
        
        body {
            font-family: 'Inter', 'Segoe UI', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .container {
            width: 100%;
            max-width: 450px;
            padding: 20px;
        }
        
        .glass-card {
            background: rgba(45, 55, 72, 0.95);
            backdrop-filter: blur(20px);
            border: 2px solid rgba(102, 126, 234, 0.3);
            border-radius: 20px;
            padding: 50px 40px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }
        
        .logo {
            font-size: 48px;
            text-align: center;
            margin-bottom: 10px;
            filter: drop-shadow(0 0 15px rgba(255, 215, 0, 0.5));
        }
        
        .title {
            font-size: 32px;
            font-weight: 900;
            background: linear-gradient(135deg, #ffd700, #ffed4e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-align: center;
            margin-bottom: 10px;
            text-shadow: 0 0 20px rgba(255, 215, 0, 0.6);
        }
        
        .subtitle {
            text-align: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            margin-bottom: 30px;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 600;
        }
        
        .tabs {
            display: flex;
            gap: 10px;
            margin-bottom: 30px;
            border-bottom: 2px solid rgba(102, 126, 234, 0.3);
        }
        
        .tab-btn {
            flex: 1;
            padding: 12px;
            background: transparent;
            border: none;
            color: rgba(255, 255, 255, 0.6);
            font-weight: 600;
            cursor: pointer;
            border-bottom: 3px solid transparent;
            transition: all 0.3s;
            font-size: 14px;
        }
        
        .tab-btn.active {
            color: #ffd700;
            border-bottom-color: #ffd700;
        }
        
        .tab-btn:hover {
            color: rgba(255, 255, 255, 0.9);
        }
        
        .tab-content {
            display: none;
        }
        
        .tab-content.active {
            display: block;
        }
        
        .form-group {
            margin-bottom: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        
        label {
            color: rgba(255, 255, 255, 0.9);
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        input {
            padding: 12px 15px;
            border: 2px solid rgba(102, 126, 234, 0.4);
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            font-size: 14px;
            font-family: inherit;
            transition: all 0.3s;
        }
        
        input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        
        input:focus {
            outline: none;
            border-color: #ffd700;
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
        }
        
        .btn {
            width: 100%;
            padding: 13px;
            margin-top: 15px;
            border: none;
            border-radius: 10px;
            font-weight: 700;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(102, 126, 234, 0.6);
        }
        
        .btn-primary:active {
            transform: translateY(0);
        }
        
        .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }
        
        .alert {
            padding: 12px 15px;
            border-radius: 10px;
            margin-bottom: 20px;
            font-size: 13px;
            font-weight: 600;
            display: none;
            animation: slideDown 0.3s ease-out;
        }
        
        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .alert.show {
            display: block;
        }
        
        .alert-success {
            background: rgba(72, 187, 120, 0.2);
            color: #68f67c;
            border: 1px solid rgba(72, 187, 120, 0.5);
        }
        
        .alert-error {
            background: rgba(245, 101, 101, 0.2);
            color: #ff6b6b;
            border: 1px solid rgba(245, 101, 101, 0.5);
        }
        
        .alert-warning {
            background: rgba(255, 193, 7, 0.2);
            color: #ffc107;
            border: 1px solid rgba(255, 193, 7, 0.5);
        }
        
        .alert-info {
            background: rgba(37, 181, 255, 0.2);
            color: #25b5ff;
            border: 1px solid rgba(37, 181, 255, 0.5);
        }
        
        .loading {
            display: none;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 10px;
        }
        
        .spinner {
            display: inline-block;
            width: 12px;
            height: 12px;
            border: 2px solid rgba(255, 215, 0, 0.3);
            border-top-color: #ffd700;
            border-radius: 50%;
            animation: spin 0.6s linear infinite;
            margin-right: 8px;
            vertical-align: middle;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        .version {
            text-align: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 11px;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(102, 126, 234, 0.2);
        }
        
        .help-text {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 8px;
            line-height: 1.5;
        }
        
        .badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.2);
            color: #ffd700;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 10px;
            font-weight: 600;
            margin-left: 5px;
        }