/* ============================================================================
   serp — base layer: reset, typography, layout primitives and shared UI
   components (buttons, forms, tables, tags, alerts, cards, modal, toast,
   empty/loading, pagination, tabs, app shell). Used by site/console/admin.
   Depends on tokens.css.
   ========================================================================== */

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

h1, h2, h3, h4 { margin: 0; font-weight: 400; }
h1, h2 { font-family: var(--font-serif); letter-spacing: -0.01em; }
h1 { font-size: var(--fs-h1); line-height: var(--lh-h1); }
h2 { font-size: var(--fs-h2); line-height: var(--lh-h2); }
h3 { font-size: var(--fs-h3); line-height: var(--lh-h3); font-weight: 600; }

::selection { background: var(--brand); color: var(--brand-ink); }

:focus-visible { outline: var(--ring-focus); outline-offset: 2px; border-radius: var(--r); }

/* ── Layout primitives ────────────────────────── */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.stack { display: flex; flex-direction: column; gap: var(--sp-4); }
.row { display: flex; align-items: center; }
.row--between { justify-content: space-between; }
.row--gap { gap: var(--sp-3); }
.muted { color: var(--text-secondary); }
.mono { font-family: var(--font-mono); }
.text-right { text-align: right; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 1px; background: var(--brand); }
.eyebrow--center { display: flex; justify-content: center; }

/* ── Buttons ──────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: inherit;
  font-size: 13px;
  line-height: 18px;
  padding: 8px 14px;
  border-radius: var(--r);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--ease), border-color var(--ease), color var(--ease), opacity var(--ease);
}
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }
.btn--primary { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.btn--primary:hover:not(:disabled) { background: var(--brand-strong); border-color: var(--brand-strong); }
.btn--outline { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn--outline:hover:not(:disabled) { border-color: var(--text); }
.btn--ghost { background: transparent; color: var(--text-secondary); border-color: transparent; }
.btn--ghost:hover:not(:disabled) { color: var(--text); background: var(--surface-2); }
.btn--danger { background: transparent; color: var(--danger); border-color: var(--border-strong); }
.btn--danger:hover:not(:disabled) { border-color: var(--danger); }
.btn--sm { padding: 5px 10px; font-size: var(--fs-meta); line-height: 16px; }
.btn--block { width: 100%; }
.btn__spin { width: 12px; height: 12px; border-radius: 50%; border: 2px solid currentColor; border-top-color: transparent; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Forms ────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: var(--sp-2); }
.form__actions { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-4); }
.field__label { font-size: var(--fs-meta); color: var(--text-secondary); }
.field__hint { font-size: var(--fs-meta); color: var(--text-secondary); }
.field__error { font-size: var(--fs-meta); color: var(--danger); }
[hidden] { display: none !important; }
.input, .select, .textarea {
  width: 100%;
  padding: 8px 10px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  color: var(--text);
  transition: border-color var(--ease), background-color var(--ease);
}
.input::placeholder, .textarea::placeholder { color: var(--text-secondary); }
.input:hover, .select:hover, .textarea:hover { border-color: var(--text-secondary); }
.input:focus-visible, .select:focus-visible, .textarea:focus-visible {
  outline: none;
  border-color: var(--brand);
  box-shadow: inset 0 0 0 1px var(--brand);
}
.input[aria-invalid="true"], .textarea[aria-invalid="true"] { border-color: var(--danger); }
.textarea { resize: vertical; min-height: 88px; font-family: var(--font-mono); font-size: var(--fs-code); line-height: var(--lh-code); }
.select { appearance: none; -webkit-appearance: none; cursor: pointer; padding-right: 34px; background-image: none; }
.select-control { position: relative; min-width: 0; }
.select-control__native { display: none !important; }
.select-control__trigger { box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; min-height: 38px; padding: 8px 10px; border: 1px solid var(--border-strong); border-radius: var(--r); background: var(--surface); color: var(--text); font: inherit; text-align: left; cursor: pointer; transition: border-color var(--ease), box-shadow var(--ease), background-color var(--ease); }
.select-control__trigger:hover, .select-control.is-open .select-control__trigger { border-color: var(--text-secondary); }
.select-control__trigger:focus-visible { outline: none; border-color: var(--brand); box-shadow: inset 0 0 0 1px var(--brand); }
.select-control__value { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.select-control__chevron { display: inline-flex; flex: 0 0 14px; color: var(--text-muted); transition: transform var(--ease); }
.select-control__chevron svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.select-control.is-open .select-control__chevron { transform: rotate(180deg); }
.select-control__list { position: absolute; z-index: var(--z-overlay); top: 100%; left: 0; right: 0; box-sizing: border-box; max-height: min(280px, 50vh); overflow-y: auto; padding: 4px; border: 1px solid var(--border-strong); border-top: 0; border-radius: 0 0 var(--r) var(--r); background: var(--surface); box-shadow: var(--shadow-overlay); }
.select-control.is-open .select-control__trigger { border-radius: var(--r) var(--r) 0 0; }
.usage-toolbar__control .select-control__trigger { height: 40px; }
.select-control__option { display: block; width: 100%; padding: 8px 10px; border: 0; border-radius: calc(var(--r) - 2px); background: transparent; color: var(--text); font: inherit; line-height: 1.4; text-align: left; cursor: pointer; }
.select-control__option:hover, .select-control__option:focus-visible { outline: none; background: var(--surface-2); }
.select-control__option[aria-selected="true"] { color: var(--brand); background: var(--surface-2); font-weight: 600; }
.select-control__option:disabled { opacity: .45; cursor: not-allowed; }

.check { display: inline-flex; align-items: flex-start; gap: 8px; cursor: pointer; }
.check input { width: 15px; height: 15px; margin-top: 3px; accent-color: var(--brand); }

.input-group { display: flex; }
.input-group .input { border-radius: var(--r) 0 0 var(--r); }
.input-group .btn { border-radius: 0 var(--r) var(--r) 0; border-left: 0; }

/* ── Cards / panels ───────────────────────────── */
.card {
  border: 1px solid var(--border);
  border-radius: var(--r-sharp);
  background: var(--surface);
}
.card__head { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); padding: var(--sp-4); border-bottom: 1px solid var(--border); }
.card__title { font-family: var(--font-serif); font-size: 16px; line-height: 24px; }
.card__body { padding: var(--sp-4); }
.card__foot { padding: var(--sp-3) var(--sp-4); border-top: 1px solid var(--border); }

.panel { border: 1px solid var(--border); border-radius: var(--r-sharp); overflow: hidden; }
.panel--head { border-bottom: 0; border-radius: var(--r-sharp) var(--r-sharp) 0 0; }

/* ── Tags / badges / status ───────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  line-height: 1;
  padding: 3px 7px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  color: var(--text-secondary);
}
.tag--brand { color: var(--brand-ink); background: var(--brand); border-color: var(--brand); }
.tag--ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--border)); }
.tag--warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, var(--border)); }
.tag--danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }

.dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; background: currentColor; }
.status { display: inline-flex; align-items: center; gap: 6px; font-size: var(--fs-meta); }
.status--ok { color: var(--ok); }
.status--warn { color: var(--warn); }
.status--danger { color: var(--danger); }
.status--muted { color: var(--text-secondary); }

/* ── Tables ───────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table.table { width: 100%; border-collapse: collapse; font-size: var(--fs-body); }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.table th { font-family: var(--font-mono); font-size: var(--fs-label); letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-secondary); font-weight: 400; background: var(--surface-2); position: sticky; top: 0; }
.table tbody tr:hover td { background: var(--surface-2); }
.table td.num, .table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table .cell-strong { font-weight: 500; }
.table .cell-main { color: var(--text); font-weight: 500; }
.table .cell-sub { color: var(--text-secondary); font-size: var(--fs-meta); }
.table .cell-id { display: inline-block; max-width: 260px; white-space: normal; word-break: break-all; line-height: 1.35; vertical-align: bottom; }

/* ── List pager (auto load-more) ──────────────── */
.list-pager { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 14px; border-top: 1px solid var(--border); }
.list-pager__done { font-size: var(--fs-meta); }
.list-pager__sentinel { width: 1px; height: 1px; }

/* ── Alerts ───────────────────────────────────── */
.alert { display: flex; gap: 10px; padding: 10px 12px; border: 1px solid var(--border-strong); border-radius: var(--r-sharp); font-size: var(--fs-body); }
.alert__ico { display: grid; place-items: center; flex: 0 0 18px; width: 18px; height: 18px; align-self: center; }
.alert__ico svg { display: block; width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.alert--ok .alert__ico { color: var(--ok); }
.alert--warn .alert__ico { color: var(--warn); }
.alert--danger .alert__ico { color: var(--danger); }
.alert--info .alert__ico { color: var(--info); }
.alert--ok { background: var(--ok-bg); border-color: color-mix(in srgb, var(--ok) 35%, var(--border)); color: var(--text); }
.alert--warn { background: var(--warn-bg); border-color: color-mix(in srgb, var(--warn) 35%, var(--border)); }
.alert--danger { background: var(--danger-bg); border-color: color-mix(in srgb, var(--danger) 35%, var(--border)); }
.alert--info { background: var(--info-bg); border-color: color-mix(in srgb, var(--info) 35%, var(--border)); }

/* ── Empty / loading ──────────────────────────── */
.empty { text-align: center; padding: var(--sp-8) var(--sp-4); color: var(--text-secondary); }
.empty__ico { width: 40px; height: 40px; margin: 0 auto var(--sp-3); border: 1px dashed var(--border-strong); border-radius: var(--r-sharp); display: flex; align-items: center; justify-content: center; color: var(--text-muted); }
.empty__title { color: var(--text); font-family: var(--font-serif); font-size: 16px; }
.empty__desc { margin-top: 8px; max-width: 42ch; margin-inline: auto; }
.empty .btn { margin-top: var(--sp-4); }

.skeleton { background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 37%, var(--surface-2) 63%); background-size: 400% 100%; animation: shimmer 1.4s ease infinite; border-radius: var(--r); }
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: 0 0; } }
.skeleton--line { height: 12px; margin: 6px 0; }
.skeleton--row { height: 36px; margin: 8px 0; }
.spinner { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--border-strong); border-top-color: var(--brand); animation: spin 0.7s linear infinite; }

/* ── Tabs (generic) ───────────────────────────── */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); }
.tabs__tab { padding: 8px 12px; font-size: 13px; color: var(--text-secondary); border-bottom: 2px solid transparent; cursor: pointer; background: none; border-top: 0; border-left: 0; border-right: 0; }
.tabs__tab[aria-selected="true"], .tabs__tab.is-selected { color: var(--text); border-bottom-color: var(--brand); }
.tabs__tab:hover { color: var(--text); }

/* ── Pagination ───────────────────────────────── */
.pager { display: flex; align-items: center; gap: 8px; }

/* ── Modal ────────────────────────────────────── */
.modal[hidden] { display: none; }
.modal { position: fixed; inset: 0; z-index: var(--z-modal); display: grid; place-items: center; padding: var(--sp-4); }
.modal__backdrop { position: absolute; inset: 0; background: color-mix(in srgb, #000 45%, transparent); }
.modal__panel { position: relative; display: flex; flex-direction: column; width: 100%; max-width: 440px; max-height: min(85vh, 760px); background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--r-sharp); box-shadow: var(--shadow-overlay); }
.modal__head { display: flex; flex: 0 0 auto; align-items: center; justify-content: space-between; padding: var(--sp-4); border-bottom: 1px solid var(--border); }
.modal__body { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: var(--sp-4); }
.modal__foot { display: flex; justify-content: flex-end; gap: 8px; padding: var(--sp-3) var(--sp-4); border-top: 1px solid var(--border); }

/* ── Toast ────────────────────────────────────── */
.toasts { position: fixed; right: var(--sp-4); bottom: var(--sp-4); z-index: var(--z-toast); display: flex; flex-direction: column; gap: 8px; }
.toast { min-width: 240px; max-width: 360px; padding: 10px 12px; border: 1px solid var(--border-strong); border-radius: var(--r-sharp); background: var(--surface); box-shadow: var(--shadow-overlay); font-size: 13px; }
.toast--ok { border-left: 3px solid var(--ok); }
.toast--danger { border-left: 3px solid var(--danger); }
.toast--info { border-left: 3px solid var(--info); }

/* ── Code ─────────────────────────────────────── */
.code { margin: 0; font-family: var(--font-mono); font-size: var(--fs-code); line-height: var(--lh-code); white-space: pre; color: var(--text); }
.code--wrap { white-space: pre-wrap; word-break: break-word; }
.t-get { color: var(--code-get); font-weight: 500; }
.t-key { color: var(--code-key); }
.t-str { color: var(--code-str); }
.t-num { color: var(--code-num); }
.comment { color: var(--text-muted); }

/* ── Definition rows (key/value) ──────────────── */
.kv { display: grid; grid-template-columns: minmax(200px, max-content) 1fr; gap: 2px 16px; }
.kv dt { color: var(--text-secondary); font-size: var(--fs-meta); padding: 5px 0; }
.kv dd { margin: 0; padding: 5px 0; border-bottom: 1px solid var(--border); }

/* ── Breadcrumb ───────────────────────────────── */
.crumbs { display: flex; align-items: center; gap: 6px; font-size: var(--fs-meta); color: var(--text-secondary); }
.crumbs a:hover { color: var(--text); }
.crumbs__sep { color: var(--text-muted); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* Shared code presentation, including dynamically generated examples. */
pre.code { overflow-x: auto; tab-size: 2; max-width: 100%; }
.code-block + .code-block, .code-sample + .code-sample { margin-top: 20px; }
.code-sample { min-width: 0; border: 1px solid var(--border-strong); border-radius: var(--r-sharp); overflow: hidden; }
.code-tools { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-bottom: 1px solid var(--border-strong); background: var(--surface-3); }
.code-tools__language { font-family: var(--font-mono); font-size: var(--fs-meta); color: var(--text-secondary); }
.code-copy { margin-left: auto; flex-shrink: 0; }
.code-sample > pre { margin: 0; padding: 20px; font-family: var(--font-mono); font-size: var(--fs-code); line-height: var(--lh-code); white-space: pre; overflow-x: auto; color: var(--text); background: var(--surface-inset); }
.code .hljs-keyword, .code .hljs-built_in, .code .hljs-meta { color: var(--code-get); }
.code .hljs-attr, .code .hljs-title, .code .hljs-name { color: var(--code-key); }
.code .hljs-string, .code .hljs-template-tag { color: var(--code-str); }
.code .hljs-number, .code .hljs-literal { color: var(--code-num); }
.code .hljs-comment { color: var(--text-muted); }