/**
 * OSA Hub Design System
 * Centralized design tokens and reusable components
 */

:root {
    /* Primary Colors */
    --primary-color: #00D9A5;
    --primary-hover: #07be94;
    --primary-light: #e6faf5;
    --primary-dark: #008d6d;
    
    /* Secondary Colors */
    --secondary-color: #4E5AFE;
    --secondary-hover: #3d4ae6;
    --secondary-light: #e9ebff;
    
    /* Status Colors */
    --success-color: #96C93D;
    --success-hover: #7ab032;
    --success-light: #f0f9e6;
    
    --danger-color: #FF4943;
    --danger-hover: #e63e38;
    --danger-light: #ffeaea;
    
    --warning-color: #EED818;
    --warning-hover: #d4c214;
    --warning-light: #fefbe6;
    
    --info-color: #05B4E1;
    --info-hover: #049fc7;
    --info-light: #e6f7fc;
    
    /* Neutral Colors */
    --dark: #343531;
    --light: #F5F9F6;
    --grey: #6E807A;
    --grey-light: #e0e6e3;
    --grey-dark: #4a5753;
    
    /* Typography */
    --font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* Button Styles */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: white;
}

.btn-primary:disabled {
    background-color: var(--grey);
    border-color: var(--grey);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Loading States */
.loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.btn-loading .loading-spinner {
    margin-right: var(--spacing-sm);
}

/* Alert Styles */
.alert {
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
}

.alert-success {
    background-color: var(--success-light);
    border-left-color: var(--success-color);
    color: var(--grey-dark);
}

.alert-danger {
    background-color: var(--danger-light);
    border-left-color: var(--danger-color);
    color: var(--grey-dark);
}

.alert-warning {
    background-color: var(--warning-light);
    border-left-color: var(--warning-color);
    color: var(--grey-dark);
}

.alert-info {
    background-color: var(--info-light);
    border-left-color: var(--info-color);
    color: var(--grey-dark);
}

/* Toast Notification Styles */
.toast-container {
    z-index: 9999;
}

.toast {
    min-width: 300px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
}

.toast-header {
    font-weight: var(--font-weight-semibold);
}

/* Form Validation Styles */
.form-control.is-invalid {
    border-color: var(--danger-color);
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23FF4943' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23FF4943' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-valid {
    border-color: var(--success-color);
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%2396C93D' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.invalid-feedback {
    display: block;
    width: 100%;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--danger-color);
}

.valid-feedback {
    display: block;
    width: 100%;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--success-color);
}

/* Table Enhancements */
.table {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.table thead th {
    background-color: var(--primary-color);
    color: white;
    font-weight: var(--font-weight-semibold);
    border: none;
    padding: var(--spacing-md);
}

.table tbody tr {
    transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
    background-color: var(--primary-light);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

/* Card Styles */
.card {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--grey-light);
    transition: box-shadow var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    font-weight: var(--font-weight-semibold);
    border-bottom: none;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0 !important;
    padding: var(--spacing-md);
}

/* Accessibility Improvements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

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

/* Responsive Utilities */
@media (max-width: 768px) {
    .table-responsive {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .alert {
        border: 1px solid var(--grey);
        page-break-inside: avoid;
    }
}