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

        body {
            font-family: Tahoma, Arial, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            position: relative;
            overflow: hidden;
        }

        /* Animated Background Particles */
        .particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 0;
            pointer-events: none;
        }

        .particle {
            position: absolute;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 50%;
            animation: float linear infinite;
        }

        @keyframes float {
            0% {
                transform: translateY(100vh) rotate(0deg);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            90% {
                opacity: 1;
            }
            100% {
                transform: translateY(-100px) rotate(360deg);
                opacity: 0;
            }
        }

        .container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            width: 90%;
            max-width: 420px;
            position: relative;
            z-index: 1;
            animation: slideIn 0.5s ease-out;
        }

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

        .logo-section {
            text-align: center;
            margin-bottom: 30px;
        }

        .logo-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 15px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
        }

        .logo-icon i {
            font-size: 36px;
            color: white;
        }

        h2 {
            margin-bottom: 8px;
            color: #333;
            font-size: 24px;
            font-weight: 700;
        }

        .subtitle {
            color: #666;
            font-size: 14px;
            margin-bottom: 20px;
        }

        .form-group {
            margin-bottom: 25px;
            position: relative;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: 600;
            font-size: 14px;
        }

        .input-wrapper {
            position: relative;
        }

        .input-icon {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #667eea;
            font-size: 18px;
        }

        input {
            width: 100%;
            padding: 14px 45px 14px 15px;
            border: 2px solid #e0e0e0;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: #f8f9fa;
        }

        input:focus {
            outline: none;
            border-color: #667eea;
            background: white;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }

        button {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        button:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
        }

        button:active:not(:disabled) {
            transform: translateY(0);
        }

        button:disabled {
            background: linear-gradient(135deg, #ccc 0%, #999 100%);
            cursor: not-allowed;
            box-shadow: none;
        }

        .message {
            padding: 14px 18px;
            margin-bottom: 20px;
            border-radius: 12px;
            text-align: center;
            font-weight: 500;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            animation: fadeIn 0.3s ease;
        }

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

        .success {
            background: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }

        .error {
            background: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }

        .timer {
            text-align: center;
            color: #666;
            margin-top: 15px;
            font-size: 14px;
            font-weight: 500;
        }

        #codeSection {
            display: none;
        }

        .resend-btn {
            margin-top: 12px;
            background: linear-gradient(135deg, #6c757d 0%, #495057 100%);
        }

        .back-link {
            text-align: center;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid #e0e0e0;
        }

        .back-link a {
            color: #667eea;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .back-link a:hover {
            color: #764ba2;
            gap: 10px;
        }

        .loading-spinner {
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-top-color: white;
            border-radius: 50%;
            animation: spin 0.6s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }