:root {
            --primary-color: #4285F4;
            --secondary-color: #34A853;
            --accent-color: #FBBC05;
            --error-color: #EA4335;
            --dark-color: #202124;
            --light-color: #f8f9fa;
            --success-bg: #e6f4ea;
            --error-bg: #fce8e6;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            transition: background 0.5s ease;
        }
        
        .container {
            width: 90%;
            max-width: 500px;
            text-align: center;
            perspective: 1000px;
        }
        
        .logo {
            margin-bottom: 30px;
            font-size: 3.5rem;
            color: var(--primary-color);
            text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1);
            animation: pulse 2s infinite;
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        
        .form-container {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1), 0 5px 15px rgba(0, 0, 0, 0.07);
            transform-style: preserve-3d;
            transition: transform 0.6s ease, box-shadow 0.6s ease;
            position: relative;
            overflow: hidden;
        }
        
        .form-container:hover {
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15), 0 10px 20px rgba(0, 0, 0, 0.1);
            transform: translateY(-5px);
        }
        
        .form-container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(
                45deg,
                transparent,
                rgba(66, 133, 244, 0.03),
                transparent
            );
            transform: rotate(45deg);
            pointer-events: none;
        }
        
        h1 {
            font-size: 28px;
            margin-bottom: 30px;
            color: var(--dark-color);
            font-weight: 600;
            position: relative;
            display: inline-block;
        }
        
        h1::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 3px;
        }
        
        .input-group {
            margin-bottom: 25px;
            text-align: left;
            position: relative;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
            color: #5f6368;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .input-container {
            position: relative;
        }
        
        .input-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #9aa0a6;
            transition: color 0.3s;
        }
        
        input {
            width: 100%;
            padding: 15px 15px 15px 45px;
            border: 1px solid #dadce0;
            border-radius: 15px;
            font-size: 16px;
            box-sizing: border-box;
            transition: all 0.3s;
            background-color: #f8f9fa;
            color: var(--dark-color);
        }
        
        input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
            background-color: #ffffff;
        }
        
        input:focus + .input-icon {
            color: var(--primary-color);
        }
        
        .input-group:hover label {
            color: var(--primary-color);
        }
        
        button {
            background: linear-gradient(to right, var(--primary-color), #5e9bf9);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
            box-shadow: 0 4px 6px rgba(66, 133, 244, 0.25);
            position: relative;
            overflow: hidden;
        }
        
        button:hover {
            background: linear-gradient(to right, #357ae8, #4e8cfa);
            transform: translateY(-2px);
            box-shadow: 0 7px 14px rgba(66, 133, 244, 0.3);
        }
        
        button:active {
            transform: translateY(0);
            box-shadow: 0 3px 8px rgba(66, 133, 244, 0.2);
        }
        
        button::after {
            content: '';
            position: absolute;
            width: 30px;
            height: 100%;
            top: 0;
            left: -100px;
            background: linear-gradient(
                90deg,
                transparent,
                rgba(255, 255, 255, 0.3),
                transparent
            );
            animation: shine 5s infinite;
        }
        
        @keyframes shine {
            0% { left: -100px; }
            20% { left: 100%; }
            100% { left: 100%; }
        }
        
        .icon-spacing {
            margin-right: 10px;
        }
        
        .result {
            margin-top: 25px;
            padding: 15px;
            border-radius: 15px;
            display: none;
            font-weight: 500;
            opacity: 0;
            transition: opacity 0.5s;
            position: relative;
            overflow: hidden;
        }
        
        .result.show {
            display: block;
            opacity: 1;
        }
        
        .success {
            background-color: var(--success-bg);
            color: var(--secondary-color);
            border-left: 4px solid var(--secondary-color);
        }
        
        .error {
            background-color: var(--error-bg);
            color: var(--error-color);
            border-left: 4px solid var(--error-color);
        }
        
        .result-icon {
            margin-right: 8px;
        }
        
        .animate-pop {
            animation: pop 0.5s ease-out;
        }
        
        @keyframes pop {
            0% { transform: scale(0.8); opacity: 0; }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); opacity: 1; }
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        
        .fade-in-1 { animation-delay: 0.1s; }
        .fade-in-2 { animation-delay: 0.2s; }
        .fade-in-3 { animation-delay: 0.3s; }
        .fade-in-4 { animation-delay: 0.4s; }
        
        @media (max-width: 768px) {
            .form-container {
                padding: 30px 20px;
            }
            
            h1 {
                font-size: 24px;
            }
            
            input {
                padding: 12px 12px 12px 40px;
            }
            
            button {
                padding: 12px 24px;
            }
        }