/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header styles */
.header {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
}

.header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Main content */
.main {
    display: grid;
    gap: 3rem;
    grid-template-columns: 1fr;
    max-width: 800px;
    margin: 0 auto;
}

/* Subscription card */
.subscription-card {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.card-header h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.card-header p {
    color: #718096;
    font-size: 1.1rem;
}

/* Form styles */
.subscription-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-weight: 500;
    color: #2d3748;
    font-size: 0.95rem;
}

.form-input {
    padding: 1rem 1.25rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.form-input::placeholder {
    color: #a0aec0;
}

/* Preferences section */
.preferences-section {
    margin: 1rem 0;
}

.preferences-title {
    font-weight: 500;
    color: #2d3748;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

/* Custom checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.95rem;
    color: #4a5568;
    transition: color 0.3s ease;
    position: relative;
}

.checkbox-label:hover {
    color: #2d3748;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    margin-right: 0.75rem;
    position: relative;
    transition: all 0.3s ease;
    background: white;
}

.checkbox-label:hover .checkmark {
    border-color: #667eea;
    transform: scale(1.05);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: #667eea;
    border-color: #667eea;
    transform: scale(1.05);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* Consent sections */
.consent-section, .marketing-consent {
    padding: 1.5rem;
    background: #f7fafc;
    border-radius: 12px;
    border-left: 4px solid #667eea;
}

.required-consent {
    font-weight: 500;
}

.consent-text {
    line-height: 1.5;
}

.privacy-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.privacy-link:hover {
    color: #5a67d8;
    text-decoration: underline;
}

/* Submit button */
.submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 1.25rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    margin-top: 1rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Loading spinner */
.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 0.5rem;
}

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

/* Success message */
.success-message {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    border-radius: 12px;
    margin-top: 1rem;
}

.success-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.success-message h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* Error messages */
.error-message {
    color: #e53e3e;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    font-weight: 500;
}

/* Features section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature {
    background: rgba(255, 255, 255, 0.9);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.feature p {
    color: #718096;
    font-size: 0.95rem;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

.footer-links a:hover {
    color: white;
    text-decoration: underline;
}

.footer-text {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    .subscription-card {
        padding: 2rem;
    }
    
    .card-header h2 {
        font-size: 1.5rem;
    }
    
    .checkbox-group {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.75rem;
    }
    
    .subscription-card {
        padding: 1.5rem;
    }
    
    .form-input {
        padding: 0.875rem 1rem;
    }
    
    .submit-btn {
        padding: 1rem 1.5rem;
    }
}

/* Form validation states */
.form-input.error {
    border-color: #e53e3e;
    box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.1);
}

.form-input.success {
    border-color: #48bb78;
    box-shadow: 0 0 0 3px rgba(72, 187, 120, 0.1);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subscription-card {
    animation: fadeInUp 0.6s ease-out;
}

.features .feature {
    animation: fadeInUp 0.6s ease-out;
}

.features .feature:nth-child(2) {
    animation-delay: 0.2s;
}

.features .feature:nth-child(3) {
    animation-delay: 0.4s;
}