* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.checkout-form {
    background: #ffffff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 450px;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.checkout-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.checkout-form h1 {
    color: #2c3e50;
    margin-bottom: 8px;
    font-size: 28px;
    font-weight: 700;
    text-align: center;
}

.checkout-form p {
    color: #7f8c8d;
    margin-bottom: 30px;
    font-size: 16px;
    text-align: center;
    font-weight: 500;
}

.checkout-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.checkout-form input[type="email"] {
    padding: 16px 20px;
    border: 2px solid #e1e8ed;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f8f9fa;
    outline: none;
}

.checkout-form input[type="email"]:focus {
    border-color: #667eea;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.checkout-form input[type="email"]::placeholder {
    color: #adb5bd;
}

.checkout-form button {
    padding: 16px 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.checkout-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.checkout-form button:active {
    transform: translateY(0);
}

/* Thank You Page Styles */
.thankyou-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.thankyou-card {
    background: #ffffff;
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 100%;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.thankyou-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.success-icon, .warning-icon, .error-icon {
    font-size: 64px;
    margin-bottom: 20px;
    display: inline-block;
}

.success-icon {
    color: #27ae60;
}

.warning-icon {
    color: #f39c12;
}

.error-icon {
    color: #e74c3c;
}

.thankyou-card h1 {
    color: #2c3e50;
    margin-bottom: 16px;
    font-size: 32px;
    font-weight: 700;
}

.thankyou-card p {
    color: #7f8c8d;
    margin-bottom: 30px;
    font-size: 16px;
    line-height: 1.6;
}

.thankyou-card small {
    color: #95a5a6;
    font-size: 14px;
}

.thankyou-actions {
    margin-top: 30px;
}

.btn-primary {
    display: inline-block;
    padding: 16px 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    text-decoration: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: #ffffff;
}

/* Responsive Design */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .checkout-form {
        padding: 30px 20px;
        margin: 10px;
    }

    .checkout-form h1 {
        font-size: 24px;
    }

    .thankyou-card {
        padding: 40px 20px;
        margin: 10px;
    }

    .thankyou-card h1 {
        font-size: 28px;
    }

    .success-icon, .warning-icon, .error-icon {
        font-size: 48px;
    }
}