* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 450px;
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header {
    background: linear-gradient(to right, #2a5298, #1e3c72);
    color: white;
    padding: 25px 20px;
    text-align: center;
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, #4CAF50, #8BC34A);
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 5px;
}

.header p {
    font-size: 14px;
    opacity: 0.9;
}

.form-container {
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s;
}

.form-group input:focus {
    border-color: #2a5298;
    box-shadow: 0 0 0 2px rgba(42, 82, 152, 0.2);
    outline: none;
}

.message {
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 5px;
    font-size: 14px;
    text-align: center;
    transition: all 0.3s ease;
}

.message.success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border-left: 4px solid #4caf50;
}

.message.error {
    background-color: #ffebee;
    color: #c62828;
    border-left: 4px solid #f44336;
}

.btn {
    display: block;
    width: 100%;
    padding: 12px;
    background: linear-gradient(to right, #2a5298, #1e3c72);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn:hover {
    background: linear-gradient(to right, #1e3c72, #2a5298);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.switch-form {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
}

.switch-form a {
    color: #2a5298;
    text-decoration: none;
    font-weight: 500;
}

.switch-form a:hover {
    text-decoration: underline;
}

.form-page {
    display: none;
}

.active {
    display: block;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background-color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    color: #2a5298;
    font-weight: bold;
    font-size: 20px;
}

.message {
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 15px;
    text-align: center;
    display: none;
}

.message.error {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

.message.success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
}

@media (max-width: 480px) {
    .container {
        max-width: 100%;
    }

    .form-container {
        padding: 20px;
    }
}