:root {
    color-scheme: light;
    --bg: #f4f6f9;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --muted: #64748b;
    --accent: #2563eb;
    --accent-soft: #eff6ff;
    --ok: #059669;
    --ok-soft: #ecfdf5;
    --warn: #d97706;
    --warn-soft: #fffbeb;
    --bad: #dc2626;
    --bad-soft: #fef2f2;
    --info: #0284c7;
    --info-soft: #f0f9ff;
    --muted-badge: #64748b;
    --muted-soft: #f1f5f9;
    --input-bg: #ffffff;
    --code-bg: #0f172a;
    --code-fg: #cbd5e1;
    --soft-surface: #fbfcfe;
    --radius: 12px;
    --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .08);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ---- Persian font (Shabnam, self-hosted) -------------------------------- */
@font-face {
    font-family: 'Shabnam';
    src: url('../fonts/Shabnam.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Shabnam';
    src: url('../fonts/Shabnam-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* In Persian (RTL) the whole UI uses Shabnam; form controls are included
   because they do not inherit the page font by default. */
[dir="rtl"] body,
[dir="rtl"] input,
[dir="rtl"] select,
[dir="rtl"] textarea,
[dir="rtl"] button {
    font-family: 'Shabnam', var(--font);
}

/* Dark theme — activated by <html data-theme="dark"> (localStorage, no FOUC). */
[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0f172a;
    --surface: #1e293b;
    --border: #334155;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --accent: #3b82f6;
    --accent-soft: rgba(59, 130, 246, .16);
    --ok: #34d399;
    --ok-soft: rgba(16, 185, 129, .16);
    --warn: #fbbf24;
    --warn-soft: rgba(217, 119, 6, .16);
    --bad: #f87171;
    --bad-soft: rgba(220, 38, 38, .16);
    --info: #38bdf8;
    --info-soft: rgba(2, 132, 199, .16);
    --muted-badge: #94a3b8;
    --muted-soft: #334155;
    --input-bg: #0f172a;
    --code-bg: #020617;
    --code-fg: #cbd5e1;
    --soft-surface: #172033;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 1px 3px rgba(0, 0, 0, .5);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

.shell { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
    width: 232px;
    flex-shrink: 0;
    background: #0f172a;
    color: #cbd5e1;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 16px;
    border-bottom: 1px solid rgba(148, 163, 184, .15);
}

.brand-mark {
    width: 34px;
    height: 34px;
    border-radius: 9px;
    background: var(--accent);
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 15px;
    flex-shrink: 0;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { color: #f1f5f9; font-size: 13px; }
.brand-text span { color: #64748b; font-size: 11px; }

.nav { padding: 12px 8px; display: flex; flex-direction: column; gap: 2px; flex: 1; }

.nav-link {
    display: block;
    padding: 8px 12px;
    border-radius: 8px;
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 500;
    font-size: 13.5px;
    transition: background .12s ease, color .12s ease;
}

.nav-link:hover { background: rgba(148, 163, 184, .12); color: #f1f5f9; }
.nav-link.is-active { background: var(--accent); color: #fff; }

.sidebar-foot {
    padding: 14px 16px;
    border-top: 1px solid rgba(148, 163, 184, .15);
    font-size: 12px;
    color: #94a3b8;
    display: flex;
    align-items: center;
    gap: 8px;
}

.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot-ok { background: var(--ok); }
.dot-warn { background: var(--warn); }
.dot-bad { background: var(--bad); }

/* ---------- Main ---------- */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 28px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.topbar h1 { margin: 0; font-size: 20px; font-weight: 650; letter-spacing: -.01em; }

.topbar-meta { display: flex; gap: 8px; align-items: center; }

.footer {
    margin-top: auto;
    padding: 16px 28px;
    display: flex;
    justify-content: space-between;
    color: var(--muted);
    font-size: 12px;
    border-top: 1px solid var(--border);
}

/* ---------- Cards / grid ---------- */
.content { padding: 24px 28px; }
.cards { padding: 24px 28px 0; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px 20px;
}

.card.block { margin: 24px 28px 0; }

.card-title {
    margin: 0 0 14px;
    font-size: 14px;
    font-weight: 650;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -.01em;
}

.card-icon { color: var(--accent); }

.kv { margin: 0; display: flex; flex-direction: column; gap: 8px; }
.kv dt { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.kv dd { margin: 0; font-weight: 550; font-size: 13.5px; word-break: break-word; }

.kv-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px 24px; }

.muted { color: var(--muted); }

/* ---------- Badges ---------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 9px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 650;
    letter-spacing: .03em;
    text-transform: uppercase;
    white-space: nowrap;
}

.badge-ready { background: var(--ok-soft); color: var(--ok); }
.badge-available { background: var(--info-soft); color: var(--info); }
.badge-unavailable { background: var(--bad-soft); color: var(--bad); }
.badge-degraded { background: var(--warn-soft); color: var(--warn); }
.badge-muted { background: var(--muted-soft); color: var(--muted-badge); }
.badge-link { text-decoration: none; }

/* ---------- Capability grid ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }

.cap {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    background: var(--soft-surface);
}

.cap-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.cap-name { font-weight: 650; font-size: 13px; }
.cap-detail { margin: 8px 0 0; font-size: 12.5px; color: var(--muted); }
.cap-latency { margin: 6px 0 0; font-size: 11.5px; color: var(--accent); font-weight: 600; }

/* ---------- Table ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 13px; }

.table th {
    text-align: left;
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .05em;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
}

.table td { padding: 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table tbody tr:last-child td { border-bottom: none; }

/* ---------- Cache selection ---------- */
.cache-selection { display: flex; flex-direction: column; gap: 8px; }

.cache-driver {
    font-size: 26px;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .02em;
}

/* ---------- Reasons ---------- */
.reason-list { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; color: var(--text); }

/* ---------- Empty state ---------- */
.empty-state {
    margin: 48px 28px;
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 48px 32px;
    text-align: center;
    max-width: 640px;
}

.empty-icon { font-size: 34px; color: var(--accent); opacity: .7; }
.empty-state h2 { margin: 12px 0 8px; font-size: 18px; }
.empty-state p { margin: 0 0 8px; color: var(--muted); }

/* ---------- Forms / tester ---------- */
.tester-form { margin-top: 14px; }

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px 18px;
}

.field { display: flex; flex-direction: column; gap: 6px; font-size: 12.5px; color: var(--muted); }
.field-wide { grid-column: 1 / -1; }

.field input, .field select {
    font: inherit;
    font-size: 14px;
    color: var(--text);
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--input-bg);
}

.field input:focus, .field select:focus {
    outline: 2px solid var(--accent-soft);
    border-color: var(--accent);
}

.tester-actions {
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    font: inherit;
    font-weight: 600;
    font-size: 14px;
    padding: 9px 20px;
    border-radius: 9px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: filter .12s ease, border-color .12s ease;
}

.btn:hover:not(:disabled) { filter: brightness(.98); border-color: var(--muted); }
.btn:disabled { opacity: .6; cursor: wait; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { filter: brightness(1.06); }

.tester-result-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 16px 0 4px;
}

.tester-values {
    margin-top: 10px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--soft-surface);
}

.tester-preview { margin-top: 12px; }
.tester-preview summary { cursor: pointer; color: var(--accent); font-size: 13px; }
.tester-preview pre {
    background: var(--code-bg);
    color: var(--code-fg);
    padding: 12px;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 12px;
    margin: 8px 0 0;
    max-height: 220px;
}

.empty-state.compact { margin: 12px 0 0; padding: 28px 24px; }

/* ---------- Installer / login (standalone pages) ---------- */
.installer-shell {
    min-height: 100vh;
    display: grid;
    place-items: start center;
    padding: 48px 16px;
    background: linear-gradient(180deg, var(--accent-soft), var(--bg) 320px);
}

.login-card { max-width: 400px; width: 100%; }
.login-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 12px; }

.installer-shell .card.block { margin: 0; max-width: 640px; width: 100%; }

.steps {
    display: flex;
    gap: 8px;
    list-style: none;
    margin: 18px 0 4px;
    padding: 0;
    flex-wrap: wrap;
}

.steps li {
    flex: 1;
    min-width: 90px;
    font-size: 11px;
    font-weight: 650;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 8px 10px;
    border-radius: 8px;
    background: var(--muted-soft);
    text-align: center;
}

.steps li.is-active { background: var(--accent); color: #fff; }

.installer-shell h2 { margin: 20px 0 6px; font-size: 17px; }
.installer-shell h3 { margin: 20px 0 4px; font-size: 14px; }

.form { display: flex; flex-direction: column; gap: 14px; margin-top: 14px; }

.form-row { display: flex; flex-direction: column; gap: 6px; font-size: 12.5px; color: var(--muted); }

.form-row input, .form-row select {
    font: inherit;
    font-size: 14px;
    color: var(--text);
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--input-bg);
}

.form-row input:focus, .form-row select:focus {
    outline: 2px solid var(--accent-soft);
    border-color: var(--accent);
}

.alert {
    padding: 10px 14px;
    border-radius: 9px;
    font-size: 13px;
    margin: 12px 0 0;
}

.alert-error { background: var(--bad-soft); color: var(--bad); border: 1px solid rgba(220, 38, 38, .25); }

.list { margin: 8px 0 0; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; }

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: .92em;
    background: var(--muted-soft);
    padding: 2px 5px;
    border-radius: 5px;
}

.inline-form { display: inline-flex; margin: 0; }

.details { margin-top: 4px; }
.details summary {
    cursor: pointer; font-size: 12.5px; color: var(--accent);
    display: inline-block; padding: 2px 0;
}
.details summary:hover { text-decoration: underline; }
.details .form { margin-top: 10px; }
.row-sub td { background: var(--row-sub-bg, transparent); padding: 8px 12px 12px; }
.actions { display: flex; gap: 6px; flex-wrap: wrap; }

.btn-small {
    font-size: 12px;
    padding: 5px 12px;
    border-radius: 999px;
    background: var(--muted-soft);
    color: var(--text);
    border: 1px solid var(--border);
    text-decoration: none;
}

.btn-sm {
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--muted-soft);
    color: var(--text);
    border: 1px solid var(--border);
    text-decoration: none;
}

.btn-sm:hover { filter: brightness(.97); }

.btn-danger { background: rgba(220, 38, 38, .12); color: var(--bad); border-color: rgba(220, 38, 38, .3); }
.btn-danger:hover { filter: brightness(.97); }

/* ---------- Inline form rows / checkboxes ---------- */
.form-row-inline {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 14px 18px;
}

.form-row-inline label { display: flex; flex-direction: column; gap: 6px; }
.form-row-inline .check { flex-direction: row; align-items: center; }

.check { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text); }

/* ---------- Code blocks / inputs ---------- */
.code-block {
    background: var(--code-bg);
    color: var(--code-fg);
    padding: 12px 14px;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 12.5px;
    line-height: 1.55;
    margin: 10px 0 0;
}

.code-input {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 13px;
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text);
}

.code-input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

/* ---------- Flash notices ---------- */
.flash {
    padding: 11px 14px;
    border-radius: 9px;
    font-size: 13px;
    margin: 0 0 16px;
}

.flash-ok {
    background: rgba(16, 185, 129, .12);
    color: #047857;
    border: 1px solid rgba(16, 185, 129, .3);
}

.flash-error {
    background: var(--bad-soft);
    color: var(--bad);
    border: 1px solid rgba(220, 38, 38, .25);
}

.alert-ok {
    background: rgba(16, 185, 129, .12);
    color: #047857;
    border: 1px solid rgba(16, 185, 129, .3);
}

/* ---------- Stats tiles ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
    margin: 14px 0 6px;
}

.stat {
    background: var(--soft-surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.stat strong { font-size: 22px; font-weight: 700; letter-spacing: -.02em; color: var(--text); }
.stat span { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 650; }

.stat.is-accent strong { color: var(--accent); }
.stat.is-ok strong { color: var(--ok); }
.stat.is-warn strong { color: var(--warn); }
.stat.is-bad strong { color: var(--bad); }

/* ---------- Accessibility ---------- */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

a:focus-visible, button:focus-visible { outline-offset: 2px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
    .shell { flex-direction: column; }
    .sidebar { width: 100%; height: auto; position: static; }
    .nav { flex-direction: row; flex-wrap: wrap; }
    .sidebar-foot { display: none; }
    .topbar, .cards, .content { padding-left: 16px; padding-right: 16px; }
    .card.block, .empty-state { margin-left: 16px; margin-right: 16px; }
    .footer { flex-direction: column; gap: 4px; }
    .topbar { flex-wrap: wrap; gap: 10px; }
    .topbar-meta { flex-wrap: wrap; }

    /* Tables scroll horizontally instead of breaking the layout. */
    .card.block { overflow-x: auto; }
}

/* ---- Sources: entity mappings ----------------------------------------- */
.mapping-card { margin-top: 14px; border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; }
.mapping-card summary { cursor: pointer; font-size: 13.5px; }
.mapping-card summary:hover { color: var(--accent); }
.mapping-card .table { margin-top: 10px; }
.mapping-card .tester-form { padding: 12px 0 0; }
.form-label { font-size: 12.5px; color: var(--muted); }
.selector-rows { display: flex; flex-direction: column; gap: 8px; }
.selector-row { display: flex; gap: 8px; align-items: center; }
.selector-row select, .selector-row input {
    padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
    background: var(--input-bg); color: var(--text); font-size: 13px;
}
.selector-row .sel-type { width: 110px; }
.selector-row .sel-expression { flex: 1; min-width: 200px; }
.selector-row .sel-attribute { width: 140px; }
.actions-cell { white-space: nowrap; }
.actions-cell .btn-sm { margin-right: 4px; }
[dir="rtl"] .actions-cell .btn-sm { margin-right: 0; margin-left: 4px; }

/* ---- Price sparkline ---------------------------------------------------- */
.spark { display: inline-block; vertical-align: middle; }
.spark-wrap { display: inline-flex; align-items: center; gap: 8px; }
.spark-meta { font-size: 11px; color: var(--muted); line-height: 1.3; }
.spark-meta .delta-up { color: var(--ok); font-weight: 650; }
.spark-meta .delta-down { color: var(--bad); font-weight: 650; }

/* ---- Price detail chart dialog ------------------------------------------- */
.chart-dialog {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px 24px;
    background: var(--surface);
    color: var(--text);
    box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
    max-width: 720px;
    width: calc(100vw - 48px);
}

.chart-dialog::backdrop { background: rgba(15, 23, 42, .55); }

.chart-dialog-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.chart-dialog-head h3 { margin: 0; font-size: 16px; }

.big-chart { width: 100%; height: auto; display: block; }

.chart-stats {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin: 16px 0 8px;
}

.chart-stats .stat { padding: 10px 12px; }
.chart-stats .stat strong { font-size: 15px; }

/* ---- RTL (fa) ------------------------------------------------------------- */
[dir="rtl"] .table th, [dir="rtl"] .table td { text-align: right; }
[dir="rtl"] .reason-list { padding-left: 0; padding-right: 20px; }
[dir="rtl"] .kv dt { letter-spacing: 0; }
[dir="rtl"] .brand-text, [dir="rtl"] .nav, [dir="rtl"] .footer { text-align: right; }