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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #7db3f5 0%, #5ba3f7 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
}

.registration-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.registration-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #7db3f5, #5ba3f7);
}

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

.header h1 {
    color: #2d3748;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.header p {
    color: #718096;
    font-size: 16px;
    font-weight: 400;
}

/* Alert messages */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 14px;
    font-weight: 500;
}

.alert.success {
    background-color: #f0fff4;
    color: #22543d;
    border: 1px solid #9ae6b4;
}

.alert.error {
    background-color: #fed7d7;
    color: #742a2a;
    border: 1px solid #feb2b2;
}

/* Form styles */
.registration-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: #2d3748;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.form-group input {
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    background-color: #f7fafc;
}

.form-group input:focus {
    outline: none;
    border-color: #7db3f5;
    background-color: white;
    box-shadow: 0 0 0 3px rgba(125, 179, 245, 0.1);
}

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

.form-help {
    color: #718096;
    font-size: 12px;
    margin-top: 4px;
    font-style: italic;
}

/* Submit button */
.submit-btn {
    background: linear-gradient(135deg, #7db3f5 0%, #5ba3f7 100%);
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(125, 179, 245, 0.3);
}

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

/* Footer */
.footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e2e8f0;
}

.footer p {
    color: #718096;
    font-size: 14px;
}

.footer a {
    color: #7db3f5;
    text-decoration: none;
    font-weight: 600;
}

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

/* Responsive design */
@media (max-width: 600px) {
    .registration-card {
        padding: 30px 20px;
        margin: 10px;
    }
    
    .header h1 {
        font-size: 24px;
    }
    
    .form-group input {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

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

/* Animation for form elements */
.form-group {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }
.form-group:nth-child(5) { animation-delay: 0.5s; }

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