/* =====================================================================
   NIS Design System — Shared Components (Phase 1)
   ---------------------------------------------------------------------
   Opt-in `.nis-*` classes built on the tokens in nis-tokens.css.
   Adding this file changes nothing on its own: existing pages only
   pick up the new look where they use these classes (Phase 2+).

   One card, one KPI card, one table, one filter card, one empty state,
   one badge, one page header, one action hierarchy — shared, not copied.
   ===================================================================== */

/* ---------- Page shell ---------- */
.nis-page {
    background: var(--nis-bg);
    min-height: 100%;
    padding: var(--nis-space-5);
}

.nis-page-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--nis-space-4);
    padding-bottom: var(--nis-space-4);
    margin-bottom: var(--nis-space-5);
    border-bottom: 1px solid var(--nis-border);
}

.nis-page-header .nis-title {
    margin: 0;
    font-size: var(--nis-fs-2xl);
    font-weight: var(--nis-fw-bold);
    color: var(--nis-heading);
    line-height: 1.2;
    display: flex;
    align-items: center;
    gap: var(--nis-space-3);
}

.nis-page-header .nis-title > i {
    color: var(--nis-primary);
    font-size: .9em;
}

.nis-page-header .nis-subtitle {
    margin: var(--nis-space-1) 0 0;
    color: var(--nis-muted);
    font-size: var(--nis-fs-sm);
}

.nis-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: var(--nis-space-2);
    align-items: center;
    list-style: none;
    padding: 0;
    margin: 0 0 var(--nis-space-2);
    font-size: var(--nis-fs-xs);
    color: var(--nis-muted);
}

.nis-breadcrumb a { color: var(--nis-muted); text-decoration: none; }
.nis-breadcrumb a:hover { color: var(--nis-primary); }
.nis-breadcrumb li:not(:last-child)::after { content: "/"; margin-left: var(--nis-space-2); color: var(--nis-border-strong); }
.nis-breadcrumb li[aria-current="page"] { color: var(--nis-text); font-weight: var(--nis-fw-semibold); }

.nis-page-actions { display: flex; flex-wrap: wrap; gap: var(--nis-space-2); align-items: center; }

/* ---------- Card ---------- */
.nis-card {
    background: var(--nis-surface);
    border: 1px solid var(--nis-border);
    border-radius: var(--nis-radius);
    box-shadow: var(--nis-shadow);
    margin-bottom: var(--nis-space-5);
    overflow: hidden;
}

.nis-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--nis-space-3);
    padding: var(--nis-space-3) var(--nis-space-4);
    border-bottom: 1px solid var(--nis-border);
    background: var(--nis-surface-2);
}

.nis-card-title {
    margin: 0;
    font-size: var(--nis-fs-lg);
    font-weight: var(--nis-fw-semibold);
    color: var(--nis-heading);
    display: flex;
    align-items: center;
    gap: var(--nis-space-2);
}

.nis-card-title > i { color: var(--nis-primary); }
.nis-card-body { padding: var(--nis-space-4); }

/* ---------- KPI / stat card (one canonical design) ---------- */
.nis-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--nis-space-4);
    margin-bottom: var(--nis-space-5);
}

.nis-stat-card {
    --nis-accent: var(--nis-primary);
    --nis-accent-soft: var(--nis-primary-soft);
    display: flex;
    align-items: center;
    gap: var(--nis-space-3);
    background: var(--nis-surface);
    border: 1px solid var(--nis-border);
    border-radius: var(--nis-radius);
    box-shadow: var(--nis-shadow-sm);
    padding: var(--nis-space-4);
    transition: box-shadow .15s ease, transform .15s ease;
}

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

.nis-stat-card .nis-stat-icon {
    flex: 0 0 auto;
    width: 44px;
    height: 44px;
    border-radius: var(--nis-radius-sm);
    display: grid;
    place-items: center;
    font-size: 1.15rem;
    color: var(--nis-accent);
    background: var(--nis-accent-soft);
}

.nis-stat-card .nis-stat-body { min-width: 0; }
.nis-stat-card .nis-stat-value {
    font-size: var(--nis-fs-xl);
    font-weight: var(--nis-fw-bold);
    color: var(--nis-heading);
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
}
.nis-stat-card .nis-stat-label {
    font-size: var(--nis-fs-sm);
    color: var(--nis-muted);
    margin-top: 2px;
}
.nis-stat-card .nis-stat-sub { font-size: var(--nis-fs-xs); color: var(--nis-muted); margin-top: 2px; }

.nis-stat-card.is-primary { --nis-accent: var(--nis-primary); --nis-accent-soft: var(--nis-primary-soft); }
.nis-stat-card.is-success { --nis-accent: var(--nis-success); --nis-accent-soft: var(--nis-success-soft); }
.nis-stat-card.is-warning { --nis-accent: var(--nis-warning); --nis-accent-soft: var(--nis-warning-soft); }
.nis-stat-card.is-danger  { --nis-accent: var(--nis-danger);  --nis-accent-soft: var(--nis-danger-soft); }
.nis-stat-card.is-info    { --nis-accent: var(--nis-info);    --nis-accent-soft: var(--nis-info-soft); }

/* ---------- Table ---------- */
.nis-table { width: 100%; border-collapse: collapse; font-size: var(--nis-fs-sm); }
.nis-table thead th {
    text-align: left;
    padding: var(--nis-space-3) var(--nis-space-4);
    background-color: var(--nis-surface-2);
    color: var(--nis-heading);
    font-weight: var(--nis-fw-semibold);
    border-bottom: 2px solid var(--nis-border);
    white-space: nowrap;
}
.nis-table tbody td {
    padding: var(--nis-space-3) var(--nis-space-4);
    border-bottom: 1px solid var(--nis-border);
    color: var(--nis-text);
    vertical-align: middle;
}
.nis-table tbody tr:hover td { background: var(--nis-primary-soft); }
.nis-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.nis-table-sticky thead th { position: sticky; top: 0; z-index: 1; }
.nis-table-wrap { overflow-x: auto; border-radius: var(--nis-radius); }

/* DataTables renders its length/search/info/pagination controls inside Bootstrap
   row/col wrappers whose negative gutter margins would otherwise spill past the
   overflow container and trigger a phantom horizontal scrollbar even when the
   table fits. Contain those control rows so the scrollbar only appears when the
   TABLE is genuinely wider than the card. */
.nis-table-wrap :is(.row, .dt-layout-row) {
    margin-left: 0;
    margin-right: 0;
}
.nis-table-wrap :is(.row, .dt-layout-row) > [class*="col"] {
    padding-left: 0;
    padding-right: 0;
}

/* ---------- Filter card ---------- */
.nis-filter-card { }
.nis-filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--nis-space-3);
    align-items: end;
}
.nis-filter-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--nis-space-2);
    margin-top: var(--nis-space-4);
    padding-top: var(--nis-space-3);
    border-top: 1px solid var(--nis-border);
}
.nis-filter-actions .spacer { flex: 1 1 auto; }
.nis-active-filters { display: flex; flex-wrap: wrap; gap: var(--nis-space-2); margin-top: var(--nis-space-3); }

/* ---------- Empty state ---------- */
.nis-empty {
    text-align: center;
    padding: var(--nis-space-6) var(--nis-space-4);
    color: var(--nis-muted);
}
.nis-empty .nis-empty-icon { font-size: 2.4rem; color: var(--nis-border-strong); margin-bottom: var(--nis-space-3); }
.nis-empty .nis-empty-title { font-weight: var(--nis-fw-semibold); color: var(--nis-text); }
.nis-empty .nis-empty-msg { font-size: var(--nis-fs-sm); margin-top: var(--nis-space-1); }

/* ---------- Status badge ---------- */
.nis-badge {
    display: inline-flex;
    align-items: center;
    gap: .35em;
    font-size: var(--nis-fs-xs);
    font-weight: var(--nis-fw-semibold);
    padding: .28em .7em;
    border-radius: 999px;
    line-height: 1.4;
    white-space: nowrap;
}
.nis-badge.is-success { background: var(--nis-success-soft); color: var(--nis-success); }
.nis-badge.is-warning { background: var(--nis-warning-soft); color: var(--nis-warning); }
.nis-badge.is-danger  { background: var(--nis-danger-soft);  color: var(--nis-danger); }
.nis-badge.is-info    { background: var(--nis-info-soft);    color: var(--nis-info); }
.nis-badge.is-neutral { background: var(--nis-surface-2);    color: var(--nis-muted); border: 1px solid var(--nis-border); }

/* ---------- Forms ---------- */
.nis-form-section { margin-bottom: var(--nis-space-5); }
.nis-form-section > .nis-section-title {
    font-size: var(--nis-fs-base);
    font-weight: var(--nis-fw-semibold);
    color: var(--nis-heading);
    padding-bottom: var(--nis-space-2);
    margin-bottom: var(--nis-space-4);
    border-bottom: 1px solid var(--nis-border);
    display: flex;
    align-items: center;
    gap: var(--nis-space-2);
}
.nis-form-section > .nis-section-title > i { color: var(--nis-primary); }
.nis-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--nis-space-4);
}
.nis-required::after { content: " *"; color: var(--nis-danger); font-weight: var(--nis-fw-bold); }
.nis-help { font-size: var(--nis-fs-xs); color: var(--nis-muted); margin-top: var(--nis-space-1); }

.nis-actions {
    display: flex;
    gap: var(--nis-space-2);
    justify-content: flex-end;
    padding-top: var(--nis-space-4);
    margin-top: var(--nis-space-4);
    border-top: 1px solid var(--nis-border);
}
.nis-actions-sticky {
    position: sticky;
    bottom: 0;
    background: var(--nis-surface);
    border-top: 1px solid var(--nis-border);
    box-shadow: 0 -2px 8px rgba(15, 23, 42, .05);
    padding: var(--nis-space-3) var(--nis-space-4);
    margin: var(--nis-space-4) calc(-1 * var(--nis-space-4)) calc(-1 * var(--nis-space-4));
    display: flex;
    gap: var(--nis-space-2);
    justify-content: flex-end;
    z-index: 2;
}

/* ---------- Action hierarchy (icon-only action buttons for tables) ---------- */
.nis-action-btn {
    display: inline-grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: var(--nis-radius-sm);
    border: 1px solid var(--nis-border);
    background: var(--nis-surface);
    color: var(--nis-muted);
    cursor: pointer;
    transition: color .12s ease, border-color .12s ease, background .12s ease;
}
.nis-action-btn:hover { color: var(--nis-primary); border-color: var(--nis-primary); background: var(--nis-primary-soft); }
.nis-action-btn.is-danger:hover { color: var(--nis-danger); border-color: var(--nis-danger); background: var(--nis-danger-soft); }
.nis-action-group { display: inline-flex; gap: var(--nis-space-2); }

/* ---------- Accessibility: visible focus for interactive NIS controls ---------- */
.nis-action-btn:focus-visible,
.nis-page a:focus-visible,
.nis-card a:focus-visible {
    outline: none;
    box-shadow: var(--nis-focus-ring);
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .nis-page { padding: var(--nis-space-3); }
    .nis-page-header { align-items: flex-start; }
    .nis-actions, .nis-actions-sticky { flex-direction: column; }
    .nis-actions .btn, .nis-actions-sticky .btn { width: 100%; }
}