/* ================================================================
   EK SE SRESHTHA - REUSABLE COMPONENT STYLES
   ----------------------------------------------------------------
   Shared component classes used across all pages:
   Buttons, form fields, cards, tables, badges, modals, tabs.
   ================================================================ */

/* ================================================================
   1. BUTTONS
   ================================================================ */

/* Base button - all button variants extend from this */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
    border: 1px solid transparent;
}

/* Primary action button - deep brand blue */
.btn-primary {
    background-color: var(--brand-blue);
    color: var(--white);
}

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

/* Secondary button - outlined */
.btn-secondary {
    background-color: var(--white);
    color: var(--gray-700);
    border-color: var(--gray-300);
}

.btn-secondary:hover {
    background-color: var(--gray-50);
    border-color: var(--gray-400);
}

/* Danger button for destructive actions */
.btn-danger {
    background-color: var(--brand-red);
    color: var(--white);
}

.btn-danger:hover {
    background-color: var(--brand-red-dark);
}

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

.btn-success:hover {
    filter: brightness(0.9);
}

/* Ghost/text button - no background */
.btn-ghost {
    background-color: transparent;
    color: var(--gray-600);
}

.btn-ghost:hover {
    background-color: var(--gray-100);
    color: var(--gray-800);
}

/* Icon-only button */
.btn-icon {
    padding: var(--space-2);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
}

/* Size variants */
.btn-sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
}

/* ================================================================
   2. FORM FIELDS
   ================================================================ */

/* Form group wraps label + input */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

/* Field label */
.form-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-700);
}

/* Required indicator */
.form-label .required {
    color: var(--brand-red);
    margin-left: var(--space-1);
}

/* Text input, textarea, select share the same base look */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    color: var(--gray-800);
    background-color: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--brand-blue);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--gray-400);
}

.form-textarea {
    resize: vertical;
    min-height: 96px;
    font-family: inherit;
}

/* Select field with custom arrow */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    background-size: 16px;
    padding-right: var(--space-10);
}

/* Field error state */
.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--danger);
}

/* Error message text under field */
.form-error {
    font-size: var(--text-xs);
    color: var(--danger);
    margin-top: var(--space-1);
}

/* Helper hint text */
.form-hint {
    font-size: var(--text-xs);
    color: var(--gray-500);
    margin-top: var(--space-1);
}

/* Grid layout for form fields */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-5);
}

.form-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
}

/* Form actions row (submit / cancel) */
.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--gray-200);
}

/* ================================================================
   3. CARDS
   ================================================================ */

/* Base content card */
.card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: 0 1px 3px rgba(30, 58, 138, 0.06), 0 4px 14px rgba(30, 58, 138, 0.05);
    border: 1px solid rgba(30, 58, 138, 0.1);
    overflow: hidden;
}

/* Card header with title - very light blue wash ties the cards
   to the brand palette without darkening the interface. */
.card-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid rgba(30, 58, 138, 0.1);
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.06), rgba(59, 130, 246, 0.02));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.card-subtitle {
    font-size: var(--text-sm);
    color: var(--gray-500);
    margin-top: var(--space-1);
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-4) var(--space-6);
    background-color: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

/* ================================================================
   4. TABLES
   ================================================================ */

/* Table wrapper handles horizontal scroll on mobile */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.table {
    width: 100%;
    background-color: var(--white);
}

.table thead {
    /* Brand blue header band, matching the reference attendance UI */
    background: linear-gradient(180deg, var(--brand-blue), var(--brand-blue-dark));
}

.table th {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--white);
    border-bottom: 1px solid var(--brand-blue-dark);
    white-space: nowrap;
}

.table td {
    padding: var(--space-4);
    font-size: var(--text-sm);
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: var(--gray-50);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* Empty table state */
.table-empty {
    text-align: center;
    padding: var(--space-12);
    color: var(--gray-400);
}

/* Row actions column - align icons */
.table-actions {
    display: flex;
    gap: var(--space-1);
    align-items: center;
}

/* ================================================================
   5. BADGES
   ================================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    line-height: 1.4;
}

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

.badge-danger {
    background-color: var(--brand-red-light);
    color: var(--brand-red-dark);
}

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

.badge-info {
    background-color: var(--info-light);
    color: var(--brand-blue);
}

.badge-neutral {
    background-color: var(--gray-100);
    color: var(--gray-700);
}

/* ================================================================
   6. TOGGLE SWITCH
   ================================================================ */

.toggle {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 22px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--gray-300);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.toggle-slider::before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--white);
    border-radius: 50%;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.toggle input:checked + .toggle-slider {
    background-color: var(--success);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(18px);
}

/* ================================================================
   7. MODAL
   ================================================================ */

.modal-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 640px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.modal-backdrop.active .modal {
    transform: scale(1);
}

.modal-lg {
    max-width: 900px;
}

.modal-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--gray-900);
}

.modal-close {
    padding: var(--space-2);
    color: var(--gray-500);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--gray-100);
    color: var(--gray-800);
}

/* When a <form> wraps modal-body + modal-footer, the form becomes
   the flex child of .modal. It must forward the flex layout so the
   body can shrink and scroll. Without this, long forms overflow and
   scrolling breaks inside the popup. */
.modal > form {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.modal-body {
    padding: var(--space-6);
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.modal-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--gray-200);
    background-color: var(--gray-50);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* ================================================================
   8. TABS
   ================================================================ */

.tabs {
    display: flex;
    gap: var(--space-2);
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: var(--space-6);
    overflow-x: auto;
}

.tab {
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-600);
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    white-space: nowrap;
    cursor: pointer;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}

.tab:hover {
    color: var(--brand-blue);
}

.tab.active {
    color: var(--brand-blue);
    border-bottom-color: var(--brand-blue);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ================================================================
   9. SEARCH BAR
   ================================================================ */

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 400px;
    width: 100%;
}

.search-bar input {
    width: 100%;
    padding: var(--space-3) var(--space-3) var(--space-3) var(--space-10);
    font-size: var(--text-sm);
    background-color: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--brand-blue);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.search-bar-icon {
    position: absolute;
    left: var(--space-3);
    color: var(--gray-400);
    pointer-events: none;
}

/* ================================================================
   10. AVATAR / PROFILE IMAGE
   ================================================================ */

.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--brand-blue);
    color: var(--white);
    font-weight: 600;
    font-size: var(--text-sm);
    overflow: hidden;
    flex-shrink: 0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: var(--text-lg);
}

.avatar-xl {
    width: 96px;
    height: 96px;
    font-size: var(--text-2xl);
}

/* ================================================================
   11. TOAST NOTIFICATIONS
   ================================================================ */

.toast-container {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    pointer-events: none;
}

.toast {
    background-color: var(--white);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--brand-blue);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-width: 280px;
    animation: slideIn var(--transition-base);
    pointer-events: auto;
}

.toast.success {
    border-left-color: var(--success);
}

.toast.danger {
    border-left-color: var(--danger);
}

.toast.warning {
    border-left-color: var(--warning);
}

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

/* ================================================================
   12. IMAGE UPLOAD FIELD
   ================================================================ */

.image-upload {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-5);
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    background-color: var(--gray-50);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.image-upload:hover {
    border-color: var(--brand-blue);
    background-color: var(--info-light);
}

.image-upload-preview {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background-color: var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--gray-400);
}

.image-upload-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-upload input[type="file"] {
    display: none;
}

.image-upload-label {
    font-size: var(--text-sm);
    color: var(--brand-blue);
    font-weight: 500;
}

.image-upload-hint {
    font-size: var(--text-xs);
    color: var(--gray-500);
}

/* ================================================================
   13. GLOBAL LOADER OVERLAY
   ================================================================ */

.global-loader-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.85);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}

.global-loader-overlay.active {
    display: flex;
}

.global-loader-overlay .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--brand-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.global-loader-overlay .loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.global-loader-overlay .loader-text {
    font-size: var(--text-base);
    color: var(--gray-700);
    font-weight: 500;
}

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

/* ================================================================
   14. MODAL BUTTON LOADER
   ================================================================ */

.btn-loader {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.btn:disabled .btn-text,
.btn.loading .btn-text {
    display: none;
}

.btn:disabled .btn-loader,
.btn.loading .btn-loader {
    display: inline-block;
}

/* ================================================================
   15. FORM VALIDATION
   ================================================================ */

.form-input.is-invalid {
    border-color: var(--brand-red);
    box-shadow: 0 0 0 3px var(--brand-red-light);
}

.form-input.is-invalid:focus {
    border-color: var(--brand-red);
    box-shadow: 0 0 0 3px var(--brand-red-light);
}

.form-error {
    display: block;
    color: var(--brand-red);
    font-size: var(--text-xs);
    margin-top: var(--space-1);
}

/* ================================================================
   16. PAGINATION
   ================================================================ */

.pagination-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.pagination-info {
    font-size: var(--text-sm);
    color: var(--gray-600);
    white-space: nowrap;
}

.pagination-info span {
    font-weight: 600;
    color: var(--gray-800);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-3);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    background: var(--white);
    color: var(--gray-700);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.page-btn:hover:not(:disabled) {
    background: var(--brand-blue-light);
    border-color: var(--brand-blue);
    color: var(--brand-blue-dark);
}

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

.page-btn.active {
    background: var(--brand-blue);
    border-color: var(--brand-blue);
    color: var(--white);
}

.page-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    color: var(--gray-400);
    font-size: var(--text-lg);
}

.pagination-prev,
.pagination-next {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

/* ================================================================
   17. TABLE LOADING STATE
   ================================================================ */

.table-wrapper.loading,
#district-tbody.loading {
    opacity: 0.6;
    pointer-events: none;
}

#district-tbody.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    border: 2px solid var(--gray-200);
    border-top-color: var(--brand-blue);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ================================================================
   18. EMPTY STATE
   ================================================================ */

.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-4);
    color: var(--gray-400);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--space-3);
}

.empty-state-title {
    font-size: var(--text-base);
    color: var(--gray-600);
    font-weight: 500;
    margin-bottom: var(--space-1);
}

.empty-state-text {
    font-size: var(--text-sm);
    color: var(--gray-400);
}

/* ================================================================
   19. COUNT PILLS
   ================================================================ */

.count-pill {
    display: inline-block;
    padding: 2px var(--space-2);
    background-color: var(--gray-100);
    color: var(--gray-700);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
}

/* ================================================================
   20. ROW INDEX
   ================================================================ */

.table td.row-index {
    color: var(--gray-400);
    font-weight: 500;
    text-align: center;
}