/* ============================================================
   Mobile-first responsive + uniform UI/UX
   Breakpoints: 576px, 768px, 992px, 1200px
   ============================================================ */

:root {
    --tap-min: 44px;
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --safe-top: env(safe-area-inset-top, 0);
    --safe-bottom: env(safe-area-inset-bottom, 0);
}

/* ---- Uniform buttons (all screens) ---- */
.btn {
    min-height: var(--tap-min);
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background 0.2s, border-color 0.2s, box-shadow 0.2s, opacity 0.2s;
    -webkit-tap-highlight-color: transparent;
}
.btn:active {
    opacity: 0.9;
}
@media (hover: hover) {
    .btn:hover { opacity: 0.95; }
    .btn-primary:hover { box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35); }
    .btn-success:hover { box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35); }
    .btn-danger:hover { box-shadow: 0 4px 12px rgba(239, 68, 68, 0.35); }
    .btn-warning:hover { box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35); }
}
.btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn-sm {
    min-height: 36px;
    padding: 0.4rem 0.85rem;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
}
.btn-lg {
    min-height: 48px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-group .btn,
.btn-toolbar .btn {
    min-height: 36px;
}
.btn i {
    font-size: 1em;
}

/* Disable heavy hover transforms on touch for performance */
@media (hover: none) {
    .card:hover,
    .btn:hover,
    .job-card:hover {
        transform: none;
    }
}

/* ---- Page headers ---- */
.page-header {
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-lg);
}
.page-header h1,
.page-header h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.page-header .d-flex.gap-2 {
    flex-wrap: wrap;
    gap: 0.5rem !important;
}

/* ---- Filters section ---- */
.filters-section {
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-lg);
}
.filter-group {
    gap: var(--space-md);
}
.filter-item {
    min-width: 0;
}
.filter-item .btn {
    width: 100%;
    min-height: var(--tap-min);
}

/* ---- Report / stats cards (dashboard, interview report, etc.) ---- */
.report-stats,
.dashboard-stats {
    display: grid;
    gap: var(--space-md);
    grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 576px) {
    .report-stats,
    .dashboard-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (min-width: 768px) {
    .report-stats,
    .dashboard-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Stat card (single metric) */
.stat-card {
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    border: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: box-shadow 0.2s, transform 0.2s;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}
.stat-card .stat-label {
    font-size: 0.75rem;
    opacity: 0.95;
    margin-top: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
    display: block;
}
.card.bg-primary .stat-label,
.card.bg-success .stat-label,
.card.bg-danger .stat-label,
.card.bg-info .stat-label,
.card.bg-warning .stat-label {
    color: rgba(255,255,255,0.9);
}
.card.bg-warning .stat-label {
    color: rgba(0,0,0,0.7);
}
@media (min-width: 768px) {
    .stat-card .stat-value {
        font-size: 2rem;
    }
}

/* Interview report summary row → horizontal scroll on small screens */
@media (max-width: 767px) {
    .report-summary-row .col-md-2 {
        flex: 0 0 auto;
        max-width: 130px;
        min-width: 110px;
    }
    .report-summary-row {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.5rem;
        margin-left: -0.25rem;
        margin-right: -0.25rem;
        gap: 0.5rem;
    }
    .report-summary-row .card-body {
        padding: 0.75rem;
    }
    .report-summary-row .stat-value {
        font-size: 1.35rem;
    }
}

/* ---- DataTables mobile ---- */
.table-card .card-body,
.card-body > .dataTables_wrapper {
    padding: var(--space-md);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.dataTables_wrapper .dt-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
}
.dataTables_wrapper .dt-toolbar .col-md-3,
.dataTables_wrapper .dt-toolbar .col-md-5,
.dataTables_wrapper .dt-toolbar .col-md-4 {
    max-width: 100%;
    flex: 0 0 100%;
}
.dataTables_wrapper .dt-buttons {
    justify-content: flex-start;
    flex-wrap: wrap;
}
.dataTables_wrapper .dt-buttons .btn {
    min-height: 36px;
    padding: 0.4rem 0.6rem;
    font-size: 0.8rem;
}
.dataTables_filter input {
    min-width: 0;
    width: 100%;
}
.dataTables_wrapper .dt-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
}
.dataTables_wrapper .dt-footer .dataTables_paginate {
    width: 100%;
    text-align: center;
}

/* Table horizontal scroll on small screens */
@media (max-width: 767px) {
    .dataTables_wrapper .dataTables_scrollBody,
    .table-responsive-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 -1rem;
        padding: 0 1rem;
    }
    table.dataTable {
        font-size: 0.85rem;
    }
    table.dataTable thead th,
    table.dataTable tbody td {
        padding: 0.6rem 0.5rem;
        white-space: nowrap;
    }
    table.dataTable thead th:first-child,
    table.dataTable tbody td:first-child {
        position: sticky;
        left: 0;
        background: #fff;
        z-index: 1;
        box-shadow: 2px 0 4px rgba(0,0,0,0.04);
    }
    table.dataTable tbody tr.even td:first-child {
        background: #fafbfc;
    }
}

@media (min-width: 768px) {
    .dataTables_wrapper .dt-toolbar {
        flex-direction: row;
        align-items: center;
    }
    .dataTables_wrapper .dt-buttons {
        justify-content: flex-end;
    }
    .dataTables_wrapper .dt-footer {
        flex-direction: row;
        align-items: center;
    }
}

/* ---- Charts (dashboard) ---- */
.app-main .card .card-body canvas {
    max-width: 100%;
    display: block;
}
@media (max-width: 767px) {
    .app-main .card .card-body {
        overflow-x: auto;
    }
}

/* ---- Cards (dashboard, reports) ---- */
.app-main .card,
.card {
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.app-main .card-body {
    padding: var(--space-lg);
}
@media (max-width: 767px) {
    .app-main .card-body {
        padding: var(--space-md);
    }
    .card-header {
        padding: var(--space-md) var(--space-lg);
        font-size: 0.95rem;
    }
}

/* Dashboard grid */
.app-main .row .col-md-3,
.app-main .row .col-lg-4,
.app-main .row .col-lg-8 {
    margin-bottom: var(--space-md);
}
.app-main .card.bg-primary .card-body h2,
.app-main .card.bg-success .card-body h2,
.app-main .card.bg-warning .card-body h2,
.app-main .card.bg-info .card-body h2 {
    font-size: 1.5rem;
}
@media (min-width: 768px) {
    .app-main .card.bg-primary .card-body h2,
    .app-main .card.bg-success .card-body h2,
    .app-main .card.bg-warning .card-body h2,
    .app-main .card.bg-info .card-body h2 {
        font-size: 1.75rem;
    }
}

/* ---- Forms (touch-friendly) ---- */
.form-control,
.form-select {
    min-height: var(--tap-min);
    padding: 0.65rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
}
.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}
.form-control-sm {
    min-height: 38px;
}
.form-label {
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
}

/* ---- Modals ---- */
@media (max-width: 575px) {
    .modal-dialog {
        margin: 0.5rem;
        max-width: calc(100vw - 1rem);
    }
    .modal-content {
        border-radius: var(--radius-lg);
        max-height: calc(100vh - 1rem);
        overflow: auto;
    }
    .modal-body {
        padding: var(--space-lg);
    }
    .modal-footer .btn {
        flex: 1;
        min-width: 0;
    }
}

/* ---- Alerts ---- */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
}

/* ---- App shell mobile ---- */
@media (max-width: 767px) {
    .app-main {
        padding: var(--space-md);
    }
    .app-header {
        padding: 0 var(--space-md);
    }
    .app-brand-text {
        font-size: 1rem;
    }
    .app-user-btn .app-user-name {
        display: none !important;
    }
}
@media (max-width: 991px) {
    .app-sidebar {
        width: min(280px, 85vw);
        min-width: min(280px, 85vw);
    }
}

/* ---- Action button groups ---- */
.action-buttons {
    flex-wrap: wrap;
    gap: 0.5rem;
}
.action-buttons .btn {
    min-height: 36px;
}

/* ---- List groups (todos, etc.) ---- */
.list-group-item {
    padding: var(--space-md) var(--space-lg);
    min-height: var(--tap-min);
    display: flex;
    align-items: center;
}

/* ---- Badges ---- */
.badge {
    padding: 0.35rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 6px;
}

/* ---- Print (reports) ---- */
@media print {
    .app-header,
    .app-sidebar,
    .app-quick-panel,
    .app-quick-panel-backdrop,
    .btn,
    .dataTables_wrapper .dt-toolbar,
    .dataTables_wrapper .dt-buttons,
    .dataTables_filter,
    .dataTables_length,
    .page-header .d-flex,
    .filters-section,
    .pagination {
        display: none !important;
    }
    .app-main {
        padding: 0;
    }
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    table.dataTable thead th {
        background: #f1f5f9 !important;
        color: #1e293b !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}