/* Modern Mobile-First CSS */
:root {
    --primary-color: #b85e21;
    --danger-color: #dc3545;
    --info-color: #0dcaf0;
    --light-bg: #f8f9fa;
    --border-radius: 0.375rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --transition: all 0.15s ease-in-out;
}

body,
h4 {
    color: #4d5055 !important;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

.redText {
    color: var(--primary-color) !important;
}

/* Custom primary button styling */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: var(--transition);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: #a0521d;
    border-color: #a0521d;
    transform: translateY(-1px);
    box-shadow: 0 0.25rem 0.5rem rgba(184, 94, 33, 0.2);
}

/* Form styling */
.registration-form-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    min-height: 100vh;
    overflow-y: auto;
}

.required-field::after {
    content: ' *';
    color: var(--danger-color);
    font-weight: bold;
}

.form-control {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: var(--transition);
    padding: 0.75rem 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(184, 94, 33, 0.25);
}

.form-control.is-valid {
    border-color: #198754;
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

/* Alert styling */
.alert {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--box-shadow);
}

.alert-info {
    background-color: #e7f3ff;
    color: #0c5460;
}

.alert-secondary {
    background-color: #f8f9fa;
    color: #495057;
}

.alert-warning {
    background-color: #fff3cd;
    color: #664d03;
}

/* Device image responsive styling */
.device-image {
    transition: var(--transition);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

@media (hover: hover) {
    .device-image:hover {
        transform: scale(1.02);
    }
}

/* Mobile image container styling */
.mobile-image-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Mobile-first responsive design */
@media (max-width: 575.98px) {
    .mobile-image-container {
        padding: 1rem;
        text-align: center;
    }
    
    .device-image {
        max-width: 30% !important;
        max-height: 25vh !important;
        width: auto !important;
        height: auto;
        margin: 0 auto;
        object-fit: contain !important;
    }
    
    .registration-form-container {
        padding: 1.5rem !important;
        min-height: auto;
    }
    
    .container-fluid {
        padding: 0;
    }
    
    .btn-lg {
        padding: 1rem 1.5rem;
        font-size: 1.1rem;
    }
    
    .form-control {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

@media (min-width: 576px) and (max-width: 991.98px) {
    .mobile-image-container {
        padding: 1.5rem;
        text-align: center;
    }
    
    .device-image {
        max-width: 50% !important;
        width: auto !important;
        height: auto;
        margin: 0 auto;
    }
}

@media (max-width: 767.98px) {
    .alert {
        font-size: 0.875rem;
    }
    
    h1, h2 {
        font-size: 1.25rem;
    }
}

@media (min-width: 992px) {
    .registration-form-container {
        border-left: 1px solid #dee2e6;
    }
}

/* Loading states */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Form validation animations */
.is-invalid {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Accessibility improvements */
.form-control:focus,
.btn:focus,
.form-check-input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .btn, .alert {
        display: none;
    }
}

/* Legacy margin/padding utilities (for compatibility) */

.mt10 {
    margin-top: 10px;
}

.mt20 {
    margin-top: 20px;
}

.mb10 {
    margin-bottom: 10px;
}

.mb20 {
    margin-bottom: 20px;
}

.mr10 {
    margin-right: 10px;
}

.mr20 {
    margin-right: 20px;
}

.ml10 {
    margin-left: 10px;
}

.ml20 {
    margin-left: 20px;
}