* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(
                rgba(0, 0, 0, 0.7),
                rgba(0, 0, 0, 0.5)
            ), url('./AASTBACK.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(15px);
            border-radius: 20px;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
            width: 100%;
            max-width: 400px;
            overflow: hidden;
            animation: slideIn 0.8s ease-out;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .header {
            background: rgba(0, 0, 0, 0.3);
            color: white;
            padding: 30px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .header::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.3; }
            50% { transform: scale(1.1) rotate(180deg); opacity: 0.6; }
        }

        .header h1 {
            font-size: 2rem;
            margin-bottom: 5px;
            font-weight: 700;
            position: relative;
            z-index: 1;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        .header p {
            font-size: 1rem;
            opacity: 0.9;
            position: relative;
            z-index: 1;
        }

        .form-container {
            padding: 40px 30px;
            text-align: center;
        }

        .form-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: #2c3e50;
            margin-bottom: 30px;
        }

        .form-group {
            margin-bottom: 25px;
            text-align: left;
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #374151;
            font-size: 1.1rem;
        }

        input {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 1.2rem;
            transition: all 0.3s ease;
            background: white;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            text-align: center;
            font-weight: 600;
        }

        input:focus {
            outline: none;
            border-color: #2c3e50;
            box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
            transform: translateY(-2px);
        }

        .btn {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: white;
            padding: 18px 40px;
            border: none;
            border-radius: 12px;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 6px 20px rgba(44, 62, 80, 0.3);
            width: 100%;
            margin-top: 10px;
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(44, 62, 80, 0.4);
        }

        .btn:active {
            transform: translateY(-1px);
        }

        .btn:disabled {
            background: #94a3b8;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .alert {
            padding: 15px;
            margin-bottom: 20px;
            border-radius: 10px;
            display: none;
            animation: slideDown 0.5s ease-out;
            text-align: center;
            font-weight: 600;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .alert.success {
            background: #dcfce7;
            border: 2px solid #bbf7d0;
            color: #166534;
        }

        .alert.error {
            background: #fef2f2;
            border: 2px solid #fecaca;
            color: #991b1b;
        }

        .alert.info {
            background: #dbeafe;
            border: 2px solid #bfdbfe;
            color: #1e40af;
        }

        .loading {
            display: none;
            text-align: center;
            margin-top: 10px;
        }

        .spinner {
            border: 3px solid #f3f3f3;
            border-top: 3px solid #2c3e50;
            border-radius: 50%;
            width: 30px;
            height: 30px;
            animation: spin 1s linear infinite;
            margin: 0 auto 10px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .setup-instructions {
            margin-top: 30px;
            padding: 20px;
            background: #f8fafc;
            border-radius: 10px;
            border: 1px solid #e2e8f0;
            font-size: 0.9rem;
            color: #64748b;
        }

        .setup-instructions h3 {
            color: #2c3e50;
            margin-bottom: 10px;
        }

        .setup-instructions ol {
            padding-left: 20px;
        }

        .setup-instructions li {
            margin-bottom: 8px;
        }

        .setup-instructions code {
            background: #e2e8f0;
            padding: 2px 6px;
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-size: 0.8rem;
        }

        @media (max-width: 480px) {
            .container {
                max-width: 350px;
            }
            
            .header h1 {
                font-size: 1.8rem;
            }
            
            .form-container {
                padding: 30px 20px;
            }
            
            .form-title {
                font-size: 1.3rem;
            }
        }