/* ==========================================================================
   High Sight Admin — Design System
   ========================================================================== */

:root {
    /* Brand */
    --color-primary: #0284c7;
    --color-primary-dark: #0369a1;
    --color-primary-light: #e0f2fe;

    /* Semantic */
    --color-success: #16a34a;
    --color-success-bg: #dcfce7;
    --color-warning: #d97706;
    --color-warning-bg: #fef3c7;
    --color-error: #dc2626;
    --color-error-bg: #fee2e2;
    --color-info: #0284c7;
    --color-info-bg: #e0f2fe;

    /* Surfaces */
    --color-bg: #f4f6f9;
    --color-surface: #ffffff;
    --color-surface-alt: #f8fafc;
    --color-border: #e2e8f0;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-text-subtle: #94a3b8;

    /* Sidebar (dark, same in both themes) */
    --sidebar-bg: #0f172a;
    --sidebar-bg-hover: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-text-active: #ffffff;
    --sidebar-width: 260px;
    --sidebar-width-collapsed: 76px;
    --topbar-height: 64px;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --fs-page-title: 1.5rem;
    --fs-section: 1.125rem;
    --fs-card-title: 0.8125rem;
    --fs-body: 0.875rem;
    --fs-caption: 0.75rem;

    /* Spacing / radius / shadow */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --transition-fast: 150ms ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg: #0b1220;
        --color-surface: #131c2e;
        --color-surface-alt: #17223a;
        --color-border: #263349;
        --color-text: #e2e8f0;
        --color-text-muted: #94a3b8;
        --color-text-subtle: #64748b;
        --color-primary-light: #0c2a3f;
        --color-success-bg: #0d2818;
        --color-warning-bg: #2e2107;
        --color-error-bg: #2e1215;
        --color-info-bg: #0c2a3f;
    }
}

:root[data-theme="dark"] {
    --color-bg: #0b1220;
    --color-surface: #131c2e;
    --color-surface-alt: #17223a;
    --color-border: #263349;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-text-subtle: #64748b;
    --color-primary-light: #0c2a3f;
    --color-success-bg: #0d2818;
    --color-warning-bg: #2e2107;
    --color-error-bg: #2e1215;
    --color-info-bg: #0c2a3f;
}

* { box-sizing: border-box; }

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: var(--fs-body);
    -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
    }
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ---------- App shell ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    flex-shrink: 0;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-fast);
    z-index: 1030;
}
.app-shell.sidebar-collapsed .sidebar { width: var(--sidebar-width-collapsed); }

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    height: var(--topbar-height);
    padding: 0 1.25rem;
    color: #fff;
    font-weight: 700;
    font-size: 1.05rem;
    white-space: nowrap;
    overflow: hidden;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand .brand-mark {
    width: 32px; height: 32px; border-radius: 8px;
    background: var(--color-primary);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; font-weight: 800;
}

.sidebar-nav { flex: 1; overflow-y: auto; padding: 0.75rem 0.75rem; }
.sidebar-section-label {
    color: #64748b;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.75rem 0.75rem 0.375rem;
    white-space: nowrap;
    overflow: hidden;
}
.app-shell.sidebar-collapsed .sidebar-section-label { opacity: 0; height: 0; padding: 0; }

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--sidebar-text);
    padding: 0.5625rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: 2px;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    transition: background var(--transition-fast), color var(--transition-fast);
}
.sidebar-link i { font-size: 1.05rem; width: 20px; text-align: center; flex-shrink: 0; }
.sidebar-link:hover { background: var(--sidebar-bg-hover); color: #fff; }
.sidebar-link.active { background: var(--color-primary); color: #fff; }
.sidebar-link .link-label { overflow: hidden; text-overflow: ellipsis; }
.app-shell.sidebar-collapsed .sidebar-link .link-label { display: none; }
.app-shell.sidebar-collapsed .sidebar-link { justify-content: center; }

.sidebar-foot {
    padding: 0.75rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.main-area {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
    transition: margin-left var(--transition-fast);
    display: flex;
    flex-direction: column;
}
.app-shell.sidebar-collapsed .main-area { margin-left: var(--sidebar-width-collapsed); }

/* ---------- Topbar ---------- */
.topbar {
    height: var(--topbar-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 1.25rem;
    position: sticky;
    top: 0;
    z-index: 1020;
}
.topbar-icon-btn {
    width: 38px; height: 38px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    position: relative;
    cursor: pointer;
    transition: background var(--transition-fast);
}
.topbar-icon-btn:hover { background: var(--color-surface-alt); color: var(--color-text); }
.topbar-icon-btn .badge-dot {
    position: absolute; top: 4px; right: 4px;
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--color-error);
    border: 2px solid var(--color-surface);
}
.breadcrumb { margin: 0; font-size: var(--fs-caption); }

.global-search { position: relative; flex: 1; max-width: 420px; }
.global-search input {
    width: 100%;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem 0.5rem 2.25rem;
    font-size: var(--fs-body);
    color: var(--color-text);
}
.global-search i { position: absolute; left: 0.75rem; top: 50%; transform: translateY(-50%); color: var(--color-text-subtle); }
.search-results {
    position: absolute; top: calc(100% + 6px); left: 0; right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    max-height: 420px; overflow-y: auto;
    z-index: 1050;
    display: none;
}
.search-results.show { display: block; }
.search-group-label { padding: 0.5rem 0.875rem; font-size: var(--fs-caption); color: var(--color-text-subtle); text-transform: uppercase; letter-spacing: 0.04em; }
.search-result-item { display: block; padding: 0.5rem 0.875rem; color: var(--color-text); border-radius: var(--radius-sm); }
.search-result-item:hover { background: var(--color-surface-alt); }
.search-empty { padding: 1rem; text-align: center; color: var(--color-text-subtle); font-size: var(--fs-caption); }

.content { padding: 1.5rem; flex: 1; }

.page-title { font-size: var(--fs-page-title); font-weight: 700; margin: 0; }
.page-subtitle { color: var(--color-text-muted); font-size: var(--fs-body); }

/* ---------- Cards ---------- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
    font-size: var(--fs-section);
}

/* ---------- KPI cards ---------- */
.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.125rem 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    height: 100%;
}
.kpi-top { display: flex; align-items: flex-start; justify-content: space-between; }
.kpi-label { font-size: var(--fs-card-title); color: var(--color-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.kpi-icon {
    width: 36px; height: 36px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    background: var(--color-primary-light); color: var(--color-primary);
    flex-shrink: 0;
}
.kpi-value { font-size: 1.75rem; font-weight: 700; line-height: 1.1; }
.kpi-trend { font-size: var(--fs-caption); display: flex; align-items: center; gap: 0.25rem; }
.kpi-trend.up { color: var(--color-success); }
.kpi-trend.down { color: var(--color-error); }
.kpi-trend.flat { color: var(--color-text-subtle); }
.kpi-trend-label { color: var(--color-text-subtle); }

/* ---------- Badges ---------- */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.625rem;
    border-radius: 999px;
    font-size: var(--fs-caption);
    font-weight: 600;
}
.status-badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.status-badge.s-success { background: var(--color-success-bg); color: var(--color-success); }
.status-badge.s-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.status-badge.s-error { background: var(--color-error-bg); color: var(--color-error); }
.status-badge.s-info { background: var(--color-info-bg); color: var(--color-info); }
.status-badge.s-neutral { background: var(--color-surface-alt); color: var(--color-text-muted); }

/* ---------- Tables ---------- */
.table-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.table-toolbar { padding: 1rem 1.25rem; border-bottom: 1px solid var(--color-border); display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.table-toolbar .flex-spacer { flex: 1; }
.table-scroll { overflow-x: auto; }
table.data-table { width: 100%; margin: 0; font-size: var(--fs-body); }
table.data-table thead th {
    background: var(--color-surface-alt);
    color: var(--color-text-muted);
    font-size: var(--fs-caption);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-weight: 600;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}
table.data-table thead th a { color: inherit; display: inline-flex; align-items: center; gap: 4px; }
table.data-table tbody td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--color-border); color: var(--color-text); vertical-align: middle; }
table.data-table tbody tr:last-child td { border-bottom: none; }
table.data-table tbody tr:hover { background: var(--color-surface-alt); }

.pagination-bar { padding: 0.875rem 1.25rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.75rem; border-top: 1px solid var(--color-border); }

/* ---------- Empty / error states ---------- */
.empty-state, .error-state { text-align: center; padding: 3rem 1.5rem; color: var(--color-text-muted); }
.empty-state i, .error-state i { font-size: 2.25rem; color: var(--color-text-subtle); margin-bottom: 0.75rem; display: block; }
.empty-state h6, .error-state h6 { color: var(--color-text); margin-bottom: 0.25rem; }

/* ---------- Skeleton loaders ---------- */
.skeleton { background: linear-gradient(90deg, var(--color-surface-alt) 25%, var(--color-border) 37%, var(--color-surface-alt) 63%); background-size: 400% 100%; animation: skeleton-loading 1.4s ease infinite; border-radius: var(--radius-sm); }
@keyframes skeleton-loading { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

/* ---------- Forms ---------- */
.form-label { font-weight: 600; font-size: var(--fs-caption); color: var(--color-text); }
.required-mark { color: var(--color-error); }
.form-control, .form-select {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}
.form-control:focus, .form-select:focus {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}
.form-section-title { font-weight: 600; font-size: var(--fs-section); margin-bottom: 0.25rem; }
.form-section-hint { color: var(--color-text-muted); font-size: var(--fs-caption); margin-bottom: 1rem; }

/* ---------- Buttons ---------- */
.btn-primary { background-color: var(--color-primary); border-color: var(--color-primary); }
.btn-primary:hover { background-color: var(--color-primary-dark); border-color: var(--color-primary-dark); }
.btn-outline-secondary { color: var(--color-text-muted); border-color: var(--color-border); }

/* ---------- Modal / dropdown surfaces follow theme ---------- */
.modal-content, .dropdown-menu { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.dropdown-item { color: var(--color-text); }
.dropdown-item:hover { background: var(--color-surface-alt); color: var(--color-text); }

/* ---------- Toasts ---------- */
.toast-stack { position: fixed; top: 80px; right: 1.25rem; z-index: 1080; display: flex; flex-direction: column; gap: 0.5rem; }

/* ---------- Action-required list ---------- */
.action-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 0; border-bottom: 1px solid var(--color-border); }
.action-item:last-child { border-bottom: none; }
.action-item .action-icon { width: 34px; height: 34px; border-radius: 9px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }

/* ---------- Activity timeline ---------- */
.activity-item { display: flex; gap: 0.75rem; padding: 0.7rem 0; }
.activity-icon { width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 0.8rem; }

/* ---------- Responsive ---------- */
@media (max-width: 991.98px) {
    .sidebar { transform: translateX(-100%); transition: transform var(--transition-fast); }
    .app-shell.mobile-open .sidebar { transform: translateX(0); }
    .main-area, .app-shell.sidebar-collapsed .main-area { margin-left: 0; }
    .sidebar-backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 1025; }
    .app-shell.mobile-open .sidebar-backdrop { display: block; }
    .global-search { display: none; }
}
@media (max-width: 575.98px) {
    .content { padding: 1rem; }
    .kpi-value { font-size: 1.5rem; }
}