/* Bithub UI — design tokens + shell + components.
 *
 * Dark-first, zinc base. OKLCH para cores. tabular-nums obrigatorio em
 * todo numero financeiro. Status sempre com texto + cor (e icone via
 * caracter unicode). Sem verde/vermelho para direcao de preco.
 *
 * Referencia: bithub-vault/01-Architecture/Frontend-Dashboard-Architecture.md
 * secao 5 (design system).
 */

:root {
  /* Surfaces */
  --bg:          oklch(0.18 0.005 270);
  --bg-panel:   oklch(0.22 0.005 270);
  --bg-panel-2: oklch(0.26 0.005 270);
  --bg-hover:   oklch(0.30 0.005 270);
  --border:     oklch(0.32 0.005 270);
  --border-strong: oklch(0.42 0.005 270);

  /* Text */
  --text:       oklch(0.95 0.005 270);
  --text-muted: oklch(0.70 0.005 270);
  --text-dim:   oklch(0.55 0.005 270);

  /* Status (operational, never price direction) */
  --ok:    oklch(0.72 0.18 145);
  --warn:  oklch(0.78 0.18 75);
  --stale: oklch(0.72 0.16 55);
  --err:   oklch(0.65 0.20 25);
  --info:  oklch(0.70 0.10 240);
  --accent: oklch(0.70 0.10 270);

  /* Status backgrounds (translucent) */
  --ok-bg:    oklch(0.30 0.10 145 / 0.18);
  --warn-bg:  oklch(0.35 0.10 75  / 0.20);
  --stale-bg: oklch(0.32 0.10 55  / 0.20);
  --err-bg:   oklch(0.32 0.12 25  / 0.20);
  --info-bg:  oklch(0.32 0.07 240 / 0.20);

  /* Density (compact default) */
  --row-h: 28px;
  --gap:   6px;
  --pad:   8px;
  --radius: 6px;

  /* Layout */
  --header-h: 48px;
  --footer-h: 28px;
  --sidebar-w: 220px;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui,
    sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", "SF Mono",
    Menlo, Consolas, monospace;
}

[data-density="normal"] {
  --row-h: 36px;
  --gap: 10px;
  --pad: 12px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

a {
  color: var(--info);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 10px;
}
button:hover { background: var(--bg-hover); }
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
button[aria-pressed="true"] {
  background: var(--bg-panel-2);
  border-color: var(--border-strong);
}

.tabular { font-variant-numeric: tabular-nums; }
.mono    { font-family: var(--font-mono); }
.muted   { color: var(--text-muted); }
.dim     { color: var(--text-dim); }

/* ---------- Shell ---------- */

.app-shell {
  display: grid;
  grid-template-rows: var(--header-h) 1fr var(--footer-h);
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-areas:
    "header header"
    "sidebar content"
    "footer footer";
  min-height: 100vh;
}

.app-header {
  grid-area: header;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 16px;
  position: sticky; top: 0; z-index: 10;
}
.app-header .brand {
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}
.app-header .brand .phase {
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 8px;
  font-size: 11px;
}
.app-header .spacer { flex: 1; }
.app-header .toolbar { display: flex; gap: 6px; align-items: center; }

.app-sidebar {
  grid-area: sidebar;
  border-right: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 8px 0;
}
.app-sidebar nav { display: flex; flex-direction: column; gap: 0; }
.app-sidebar a.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--text-muted);
  border-left: 2px solid transparent;
  font-size: 13px;
  text-decoration: none;
}
.app-sidebar a.nav-item:hover { background: var(--bg-hover); color: var(--text); }
.app-sidebar a.nav-item.active {
  color: var(--text);
  border-left-color: var(--accent);
  background: var(--bg-panel-2);
}
.app-sidebar a.nav-item .key {
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-left: auto;
  font-size: 11px;
}

.app-content {
  grid-area: content;
  padding: 12px 16px;
  overflow: auto;
}

.app-footer {
  grid-area: footer;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 16px;
  font-size: 11px;
  color: var(--text-muted);
}
.app-footer .footer-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-dim);
  display: inline-block;
}
.app-footer .footer-dot[data-status="ok"]       { background: var(--ok); }
.app-footer .footer-dot[data-status="degraded"] { background: var(--warn); }
.app-footer .footer-dot[data-status="stale"]    { background: var(--stale); }
.app-footer .footer-dot[data-status="error"]    { background: var(--err); }

/* ---------- Freshness banner ---------- */

.freshness-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  margin-bottom: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  font-size: 12px;
}
.freshness-banner[data-status="degraded"] {
  background: var(--warn-bg);
  border-color: var(--warn);
}
.freshness-banner[data-status="stale"] {
  background: var(--stale-bg);
  border-color: var(--stale);
}
.freshness-banner[data-status="error"] {
  background: var(--err-bg);
  border-color: var(--err);
}

/* ---------- Cards ---------- */

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--pad);
  margin-bottom: var(--gap);
}
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.card-head h2,
.card-head h3 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.card-head .meta {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap);
}
.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

/* ---------- Status badges ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 6px;
  border-radius: 999px;
  font-size: 11px;
  line-height: 1.2;
  border: 1px solid currentColor;
  background: transparent;
  white-space: nowrap;
}
.badge[data-status="ok"]       { color: var(--ok);    background: var(--ok-bg); }
.badge[data-status="degraded"] { color: var(--warn);  background: var(--warn-bg); }
.badge[data-status="stale"]    { color: var(--stale); background: var(--stale-bg); }
.badge[data-status="error"]    { color: var(--err);   background: var(--err-bg); }
.badge[data-status="loading"]  { color: var(--text-muted); }
.badge[data-status="empty"]    { color: var(--text-dim); }
.badge[data-status="info"]     { color: var(--info);  background: var(--info-bg); }
.badge[data-status="accent"]   { color: var(--accent); }

.badge .glyph {
  display: inline-block;
  width: 10px;
  text-align: center;
  font-family: var(--font-mono);
}

/* ---------- KV (key-value blocks) ---------- */

.kv {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 2px 12px;
  font-size: 12px;
}
.kv dt {
  color: var(--text-muted);
  white-space: nowrap;
}
.kv dd {
  margin: 0;
  color: var(--text);
}

/* ---------- Tables ---------- */

table.dt {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
table.dt th, table.dt td {
  text-align: left;
  padding: 4px 8px;
  border-bottom: 1px solid var(--border);
  height: var(--row-h);
}
table.dt th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: var(--bg-panel-2);
  position: sticky; top: 0;
}
table.dt tbody tr:hover { background: var(--bg-hover); }
table.dt td.num { font-variant-numeric: tabular-nums; text-align: right; }

/* ---------- State components ---------- */

.state {
  padding: 12px;
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  color: var(--text-muted);
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.state[data-state="error"] {
  border-style: solid;
  border-color: var(--err);
  background: var(--err-bg);
  color: var(--text);
}
.state[data-state="empty"] { color: var(--text-dim); }
.state .state-title {
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--text);
}
.state .state-hint { font-size: 11px; }
.state .state-code {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 11px;
}

.skeleton {
  height: 12px;
  background: linear-gradient(
    90deg,
    var(--bg-panel) 0%,
    var(--bg-panel-2) 50%,
    var(--bg-panel) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s infinite linear;
  border-radius: 3px;
}
.skeleton + .skeleton { margin-top: 6px; }
.skeleton.w-40 { width: 40%; }
.skeleton.w-60 { width: 60%; }
.skeleton.w-80 { width: 80%; }

@keyframes shimmer {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ---------- Chips and tags ---------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.chip.run    { color: var(--info); border-color: var(--info); background: var(--info-bg); }
.chip.cache  { color: var(--accent); }
.chip.r2-key { max-width: 240px; overflow: hidden; text-overflow: ellipsis; }

/* ---------- Section status grid ---------- */

.section-grid {
  display: grid;
  grid-template-columns: minmax(120px, max-content) repeat(5, minmax(0, 1fr));
  gap: 0;
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.section-grid .head,
.section-grid .cell {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  background: var(--bg-panel);
  display: flex;
  align-items: center;
}
.section-grid .head {
  background: var(--bg-panel-2);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.section-grid .head:last-child,
.section-grid .cell:nth-last-child(-n+1) {
  border-right: none;
}
.section-grid > :nth-last-child(-n+6) {
  border-bottom: none;
}

/* ---------- Misc utilities ---------- */

.row { display: flex; gap: 6px; align-items: center; }
.col { display: flex; flex-direction: column; gap: 6px; }
.gap-12 { gap: 12px; }
.mt-8  { margin-top: 8px; }
.mb-8  { margin-bottom: 8px; }
.mt-12 { margin-top: 12px; }
.mb-12 { margin-bottom: 12px; }
.flex-1 { flex: 1; }
.right { margin-left: auto; }

.bithub-disclaimer {
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-panel-2);
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.5;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "content"
      "footer";
  }
  .app-sidebar { display: none; }
  .section-grid {
    grid-template-columns: minmax(100px, max-content) repeat(2, minmax(0, 1fr));
  }
  .section-grid .head:nth-child(n+4),
  .section-grid .cell:nth-child(n+4) { display: none; }
}