/* ============================================
   EducaHt Components - Reusable UI Elements
   ============================================ */

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-decoration: none;
    user-select: none;
}

/* Button Sizes */
.btn-lg {
    padding: 14px 32px;
    font-size: var(--font-size-lg);
}

.btn-md {
    padding: 10px 20px;
    font-size: var(--font-size-base);
}

.btn-sm {
    padding: 8px 16px;
    font-size: var(--font-size-sm);
}

.btn-xs {
    padding: 6px 12px;
    font-size: var(--font-size-xs);
}

/* Primary Button */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

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

.btn-primary:disabled {
    background-color: var(--color-neutral-400);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Secondary Button */
.btn-secondary {
    background-color: var(--color-bg-card);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-hover);
}

.btn-secondary:disabled {
    background-color: var(--color-bg-hover);
    opacity: 0.6;
}

/* Outline Button */
.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary-light);
}

/* Ghost Button */
.btn-ghost {
    background-color: transparent;
    color: var(--color-primary);
    border: none;
}

.btn-ghost:hover {
    background-color: var(--color-primary-light);
}

/* Danger Button */
.btn-danger {
    background-color: var(--color-error);
    color: var(--color-white);
}

.btn-danger:hover {
    background-color: #DC2626;
}

/* Success Button */
.btn-success {
    background-color: var(--color-success);
    color: var(--color-white);
}

.btn-success:hover {
    background-color: #059669;
}

/* Full Width Button */
.btn-block {
    width: 100%;
}

/* Icon Button */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
    margin-bottom: var(--space-xl) !important;
}

.form-label {
    display: block;
    font-size: var(--font-size-lg) !important;
    font-weight: var(--font-weight-bold) !important;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.form-label.required::after {
    content: " *";
    color: var(--color-error);
}

.form-control {
    width: 100%;
    max-width: var(--form-input-width);
    padding: 12px 14px;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    border: 2px solid #999 !important;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-input);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.form-control::placeholder {
    color: var(--color-text-tertiary);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
    background-color: var(--color-white);
}

.form-control:disabled {
    background-color: var(--color-neutral-100);
    color: var(--color-text-tertiary);
    cursor: not-allowed;
}

.form-control-error {
    border-color: var(--color-error);
}

.form-control-error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-control-success {
    border-color: var(--color-success);
}

.form-control-success:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Form Help Text */
.form-help {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-xs);
}

.form-error {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-error);
    margin-top: var(--space-xs);
}

.form-success {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-success);
    margin-top: var(--space-xs);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    flex-shrink: 0;
}

.form-check label {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    cursor: pointer;
    margin: 0;
}

/* Select */
.form-select {
    position: relative;
}

.form-select select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234B5563' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    border: 2px solid #999 !important;
}

/* Textarea */
textarea.form-control {
    max-width: 100%;
    resize: vertical;
    min-height: 100px;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background-color: var(--color-bg-card);
    border: 2px solid #E5E7EB;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-base);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: #D1D5DB;
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 2px solid #E5E7EB;
    background-color: #F9FAFB;
    font-weight: var(--font-weight-bold);
}

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-page);
}

/* Metric Card */
.metric-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.metric-value {
    font-size: 32px;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.metric-label {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

.metric-icon {
    font-size: 32px;
    color: var(--color-secondary);
}

/* ============================================
   BADGES
   ============================================ */

.badge {
    display: inline-block;
    padding: 6px 12px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    background-color: var(--color-neutral-100);
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.badge-success {
    background-color: #ECFDF5;
    color: #065F46;
}

.badge-error {
    background-color: #FEF2F2;
    color: #7F1D1D;
}

.badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-info {
    background-color: #EFF6FF;
    color: #1E40AF;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 2px solid;
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
    margin-bottom: var(--space-lg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.alert-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-xs);
}

.alert-description {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

.alert-primary {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

.alert-success {
    background-color: #ECFDF5;
    border-color: var(--color-success);
    color: #065F46;
}

.alert-error {
    background-color: #FEF2F2;
    border-color: var(--color-error);
    color: #7F1D1D;
}

.alert-warning {
    background-color: #FEF3C7;
    border-color: var(--color-warning);
    color: #92400E;
}

/* ============================================
   TABLES
   ============================================ */

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-base);
}

.table thead {
    background-color: var(--color-bg-hover);
    border-bottom: 1px solid var(--color-border);
}

.table thead th {
    padding: 14px 16px;
    text-align: left;
    font-weight: var(--font-weight-bold);
    color: #374151;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background-color: #E5E7EB;
}

.table tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--transition-base);
}

.table tbody tr:nth-child(odd) {
    background-color: #FFFFFF;
}

.table tbody tr:nth-child(even) {
    background-color: #F8F9FA;
}

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

.table tbody td {
    padding: 14px 16px;
    color: var(--color-text-primary);
}

.table-row-actions {
    display: flex;
    gap: var(--space-sm);
}

.table-row-actions .btn-icon {
    width: 32px;
    height: 32px;
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    align-items: center;
    margin-top: var(--space-xl);
}

.pagination .page-link {
    padding: 8px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-card);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.pagination .page-link:hover {
    background-color: var(--color-neutral-100);
}

.pagination .page-link.active {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.pagination .page-link.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   MODALS
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn var(--transition-base);
}

.modal {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp var(--transition-slow);
}

.modal-header {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-text-tertiary);
    padding: 0;
    width: 32px;
    height: 32px;
}

.modal-body {
    padding: var(--space-xl);
}

.modal-footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* ============================================
   DROPDOWNS
   ============================================ */

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: 100;
    margin-top: var(--space-sm);
    animation: slideUp var(--transition-base);
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: 12px 16px;
    text-align: left;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--font-size-base);
    transition: background-color var(--transition-base);
}

.dropdown-item:hover {
    background-color: var(--color-neutral-50);
}

.dropdown-divider {
    height: 1px;
    background-color: var(--color-border);
    margin: var(--space-sm) 0;
}

/* ============================================
   LOADING STATES
   ============================================ */

.skeleton {
    background-color: var(--color-neutral-200);
    border-radius: var(--radius-md);
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-neutral-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ============================================
   TEXT UTILITIES & CONTRAST IMPROVEMENTS
   ============================================ */

/* Override Bootstrap .text-muted for better contrast */
.text-muted {
    color: var(--color-text-secondary) !important;
}

/* Enhanced contrast for small text */
small.text-muted,
.small.text-muted,
.text-muted.small {
    color: #2a3647 !important;  /* Even darker for small text */
}

@media (prefers-color-scheme: dark) {
    small.text-muted,
    .small.text-muted,
    .text-muted.small {
        color: var(--color-text-secondary) !important;
    }
}