/* Custom Styles for Participant Registration Form */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 2rem 0;
}

.container {
    max-width: 900px;
}

.form-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.form-title {
    color: var(--dark-color);
    font-weight: 700;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-description {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.section-header {
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--light-color);
}

.section-header h3 {
    color: var(--primary-color);
    font-weight: 600;
    margin: 0;
    font-size: 1.5rem;
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-label.required::after {
    content: " *";
    color: var(--danger-color);
    font-weight: bold;
}

.form-control {
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #fff;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    transform: translateY(-1px);
}

.form-control:invalid:not(.success-state) {
    border-color: var(--danger-color);
}

.form-control.success-state {
    border-color: var(--success-color) !important;
    box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.15);
}

.form-control.success-state:focus {
    border-color: var(--success-color);
    box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.25);
}

.form-control::placeholder {
    color: #adb5bd;
    opacity: 1;
}

.btn {
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    text-transform: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #0056b3);
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(13, 110, 253, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.4);
    background: linear-gradient(45deg, #0056b3, var(--primary-color));
}

.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(13, 110, 253, 0.3);
}

.btn-outline-secondary {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.btn-outline-secondary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-1px);
}

.alert {
    border-radius: 10px;
    border: none;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.alert-success {
    background: linear-gradient(45deg, #d4edda, #c3e6cb);
    color: #155724;
}

.alert-danger {
    background: linear-gradient(45deg, #f8d7da, #f1aeb5);
    color: #721c24;
}

.alert-info {
    background: linear-gradient(45deg, #d1ecf1, #b6dfea);
    color: #0c5460;
}

.form-text {
    font-size: 0.875rem;
    color: var(--secondary-color);
    margin-top: 0.25rem;
}

.bg-light {
    background: linear-gradient(45deg, #f8f9fa, #e9ecef) !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 1rem 0;
    }
    
    .form-container {
        padding: 1.5rem;
        margin: 0.5rem;
        border-radius: 15px;
    }
    
    .form-title {
        font-size: 2rem;
    }
    
    .section-header h3 {
        font-size: 1.3rem;
    }
}

@media (max-width: 576px) {
    .form-title {
        font-size: 1.75rem;
    }
    
    .form-container {
        padding: 1rem;
    }
    
    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

/* Animation for form elements */
.form-control, .btn {
    animation: fadeInUp 0.6s ease-out;
}

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

/* Loading state for buttons */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}

/* Focus indicators for accessibility */
.btn:focus,
.form-control:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    body {
        background: white;
    }
    
    .form-container {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .btn {
        display: none;
    }
}