/* AgentTokens — single stylesheet. Dark, dense, developer-tool. No framework. */

:root {
  --bg: #0b0d10;
  --bg-elev: #12151a;
  --bg-elev-2: #191d24;
  --border: #252a33;
  --border-strong: #343a46;
  --text: #e6e8ec;
  --text-muted: #9aa3b2;
  --text-faint: #6b7381;
  --accent: #4fd1a5;
  --accent-strong: #2fb98a;
  --accent-ink: #06231a;
  --accent-soft: rgba(79, 209, 165, 0.12);
  --danger: #f26d6d;
  --danger-soft: rgba(242, 109, 109, 0.12);
  --ok: var(--accent);
  --ok-soft: var(--accent-soft);
  --warn: #f0b95a;
  --code-bg: #0e1116;
  --radius: 6px;
  --radius-lg: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --container: 1040px;
  --gap: 1rem;
}

/* ---------- Reset-ish ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5rem; font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: 1.9rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 .9rem; }
ul, ol { margin: 0 0 .9rem; padding-left: 1.3rem; }
li { margin: .2rem 0; }
hr { border: 0; border-top: 1px solid var(--border); margin: 1.5rem 0; }
strong { font-weight: 650; }
sup { font-size: .7em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
::selection { background: var(--accent); color: var(--accent-ink); }

code, kbd, pre {
  font-family: var(--mono);
  font-size: .875em;
}
code {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: .05em .35em;
  word-break: break-word;
}
pre code { background: none; border: 0; padding: 0; font-size: inherit; word-break: normal; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}
main.container { flex: 1; padding-top: 1.5rem; padding-bottom: 3rem; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 13, 16, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 56px;
}
.logo {
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
}
.logo::before {
  content: "";
  width: 10px; height: 10px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-soft);
}
.logo:hover { text-decoration: none; }
.nav-links {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  align-items: center;
  gap: .25rem;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links li { margin: 0; }
.nav-links a:not(.btn) {
  color: var(--text-muted);
  padding: .4rem .6rem;
  border-radius: var(--radius);
  display: inline-block;
}
.nav-links a:not(.btn):hover { color: var(--text); background: var(--bg-elev); text-decoration: none; }
.nav-links a.active { color: var(--text); }
.nav-links .btn { margin-left: .35rem; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
  color: var(--text-faint);
  font-size: .85rem;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-links {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-links li { margin: 0; }
.footer-links a { color: var(--text-muted); }

/* ---------- Utilities ---------- */
.muted { color: var(--text-muted); }
.small { font-size: .85rem; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.page-title { margin-bottom: 1rem; }
.page-title .small { font-weight: 400; margin-left: .5rem; }
.lede { font-size: 1.1rem; color: var(--text-muted); max-width: 60ch; }
.section { margin: 3.5rem 0; }
.section-head { margin-bottom: 1.25rem; }
.section-head h2 { font-size: 1.5rem; }
.section-head p { margin: 0; }
.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
/* Grid/flex children must be allowed to shrink below their content width,
   otherwise a long <pre> line widens the whole page on mobile. */
.grid > *, .hero > *, .providers-grid > *, .example-grid > *, .feature-grid > *, .form-row > * { min-width: 0; }
.inline-form { display: inline; margin: 0; }
.note { margin-top: .75rem; }
.req { color: var(--danger); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .5rem .95rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-elev-2);
  color: var(--text);
  font: inherit;
  font-weight: 550;
  line-height: 1.2;
  cursor: pointer;
  white-space: nowrap;
  transition: background .12s, border-color .12s, transform .05s;
  text-decoration: none;
}
.btn:hover { background: #21262f; border-color: #414957; text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--text-muted); }
.btn-ghost:hover { background: var(--bg-elev); color: var(--text); }
.btn-danger { color: var(--danger); border-color: rgba(242, 109, 109, .35); background: transparent; }
.btn-danger:hover { background: var(--danger-soft); border-color: var(--danger); }
.btn-sm { padding: .3rem .6rem; font-size: .8rem; }
.btn-lg { padding: .7rem 1.25rem; font-size: 1rem; }
.btn-group { display: flex; flex-wrap: wrap; gap: .5rem; }
.btn-group .btn { min-width: 4.5rem; }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: var(--gap);
}
.card > h2, .card > h3 { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.card-header h2, .card-header p { margin: 0; }

/* ---------- Flash ---------- */
.flash {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  margin-bottom: 1.25rem;
  background: var(--bg-elev);
}
.flash-ok { border-color: rgba(79, 209, 165, .4); background: var(--ok-soft); }
.flash-err { border-color: rgba(242, 109, 109, .45); background: var(--danger-soft); color: #ffd4d4; }
.flash-key { border-color: var(--accent); background: var(--accent-soft); }
.flash-key p { margin-bottom: .6rem; }
.flash-key .codeblock { margin: 0; }
.flash-key pre { font-size: .95rem; }

/* ---------- Code blocks ---------- */
.codeblock {
  position: relative;
  margin: 0 0 1rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.codeblock pre {
  margin: 0;
  padding: .9rem 1rem;
  padding-right: 4.5rem;
  overflow-x: auto;
  font-size: .82rem;
  line-height: 1.55;
  tab-size: 2;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.codeblock [data-copy] {
  position: absolute;
  top: .5rem;
  right: .5rem;
  background: var(--bg-elev-2);
  opacity: .85;
}
.codeblock [data-copy]:hover { opacity: 1; }
.codeblock [data-copy].copied { color: var(--accent); border-color: var(--accent); }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; margin-bottom: 1rem; -webkit-overflow-scrolling: touch; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.table th, .table td {
  text-align: left;
  padding: .6rem .75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.table thead th {
  color: var(--text-muted);
  font-weight: 550;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: 1px solid var(--border-strong);
}
.table tbody th { font-weight: 550; white-space: nowrap; }
.table tfoot th { border-bottom: 0; border-top: 1px solid var(--border-strong); }
.table tbody tr:hover { background: rgba(255, 255, 255, .015); }
.table tr.revoked td { color: var(--text-faint); }
.table tr.revoked code { text-decoration: line-through; }
.table td.actions { text-align: right; white-space: nowrap; }
.table td code { white-space: nowrap; }
.kv-table th { width: 30%; color: var(--text-muted); }
.kv-table td code { white-space: normal; }

.badge {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .03em;
  text-transform: uppercase;
  padding: .1rem .45rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
}
.badge-ok { color: var(--accent); border-color: rgba(79, 209, 165, .4); background: var(--accent-soft); }
.badge-muted { color: var(--text-faint); }

/* ---------- Forms ---------- */
.form label {
  display: block;
  font-size: .85rem;
  color: var(--text-muted);
  margin: .75rem 0 .3rem;
}
.form label:first-of-type { margin-top: 0; }
input[type="text"], input[type="email"], input[type="number"], input[type="password"], input[type="url"], textarea, select {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--code-bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: .5rem .7rem;
  line-height: 1.3;
}
input::placeholder, textarea::placeholder { color: var(--text-faint); }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
input:disabled, textarea:disabled { opacity: .5; }
textarea { resize: vertical; min-height: 5rem; }
.form > .btn, .form button[type="submit"]:not(.btn-sm) { margin-top: 1rem; }
.form .flash { margin-bottom: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1rem; }
.input-row { display: flex; gap: .5rem; align-items: stretch; }
.input-row input { flex: 1; min-width: 0; }
.input-row .btn { flex-shrink: 0; margin: 0; }
.card-header .input-row input { width: 14rem; }
.custom-amount { margin-top: 1rem; }
.custom-amount label { display: block; margin-bottom: .3rem; color: var(--text-muted); }
.topup-form .btn { margin-top: 0; }

/* ---------- Auth / small centred pages ---------- */
.auth {
  max-width: 460px;
  margin: 2.5rem auto;
  padding: 1.75rem;
}
.auth h1 { font-size: 1.5rem; }
.auth .form .btn { width: 100%; }
.auth p:last-child { margin-bottom: 0; }
.error-page { text-align: center; }
.error-page h1 { font-size: 3rem; color: var(--text-faint); font-family: var(--mono); }
.error-page .btn { margin: .25rem; }

/* ---------- Dashboard ---------- */
.balance-card .balance {
  font-size: 2.4rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  margin: .25rem 0 .5rem;
  color: var(--accent);
}
.usage-table td, .usage-table th { font-variant-numeric: tabular-nums; }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  padding: 2.5rem 0 1.5rem;
}
.hero h1 {
  font-size: 2.4rem;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.25rem 0; }
.hero-facts {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.25rem;
  color: var(--text-muted);
  font-size: .85rem;
}
.hero-facts li { margin: 0; display: flex; align-items: center; gap: .4rem; }
.hero-facts li::before { content: "✓"; color: var(--accent); font-weight: 700; }
.hero-code .codeblock { margin-bottom: .5rem; box-shadow: 0 20px 50px -20px rgba(0, 0, 0, .8); }
.hero-code .codeblock pre { font-size: .85rem; padding: 1.1rem 1.1rem; padding-right: 4.5rem; }
.hero-code p { margin: 0; }

/* ---------- Tabs ---------- */
.tabs { margin-bottom: 1rem; }
.tab-list {
  display: flex;
  gap: .25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-list::-webkit-scrollbar { display: none; }
.tab {
  appearance: none;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: .55rem .85rem;
  font: inherit;
  font-weight: 550;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }
.panel[hidden] { display: none; }
.panel > p:first-child { margin-bottom: .6rem; }

/* ---------- Pricing ---------- */
.pricing-table { font-size: 1rem; }
.pricing-table td.price { font-weight: 650; font-variant-numeric: tabular-nums; }
.pricing-table tr.highlight td.price { color: var(--accent); }
.pricing-table tr.highlight th::after {
  content: "prefix cache";
  display: inline-block;
  margin-left: .5rem;
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--accent);
  border: 1px solid rgba(79, 209, 165, .4);
  border-radius: 999px;
  padding: 0 .4rem;
  vertical-align: middle;
}
.example { margin-top: 1.5rem; }
.example-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}
.example-grid > div {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: .9rem 1rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.example-total {
  font-size: 1.9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.example-total.muted { color: var(--text-muted); }
.pricing-cta { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }

/* ---------- Feature grid ---------- */
.feature-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}
.feature-grid li { margin: 0; }
.feature-grid h3 { color: var(--accent); }
.feature-grid p { margin: 0; color: var(--text-muted); }

/* ---------- FAQ ---------- */
.faq details {
  border-bottom: 1px solid var(--border);
}
.faq details:first-child { border-top: 1px solid var(--border); }
.faq summary {
  cursor: pointer;
  padding: .85rem 0;
  font-weight: 550;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--text-faint);
  font-family: var(--mono);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--text-muted); margin: 0 0 1rem; max-width: 70ch; }

/* ---------- CTA band ---------- */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin: 3.5rem 0 1rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--bg-elev), var(--bg-elev-2));
}
.cta-band h2 { margin-bottom: .25rem; }
.cta-band p { margin: 0; }

/* ---------- Docs ---------- */
.docs {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}
.docs-nav {
  position: sticky;
  top: 76px;
  font-size: .85rem;
}
.docs-nav ul { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--border); }
.docs-nav li { margin: 0; }
.docs-nav a {
  display: block;
  color: var(--text-muted);
  padding: .35rem .85rem;
  margin-left: -1px;
  border-left: 1px solid transparent;
}
.docs-nav a:hover { color: var(--text); border-left-color: var(--border-strong); text-decoration: none; }
.docs-body { min-width: 0; }

/* ---------- Prose (docs, legal) ---------- */
.prose h2 {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 1.35rem;
}
.prose h3 { margin-top: 1.5rem; }
.prose p, .prose li { max-width: 75ch; }
.prose .table { margin-bottom: 1.25rem; }
.legal { max-width: 720px; }
.legal h2 { font-size: 1.15rem; margin-top: 2rem; padding-top: 1.25rem; }

/* ---------- Providers ---------- */
.providers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
  padding-top: 1rem;
}
.providers-form { margin-bottom: 0; }
.providers-form .btn-primary { width: 100%; }
.checklist { list-style: none; padding: 0; }
.checklist li { padding-left: 1.4rem; position: relative; margin: .4rem 0; color: var(--text-muted); }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 1.5rem; }
  .hero h1 { font-size: 2rem; }
  .docs { grid-template-columns: 1fr; gap: 1rem; }
  .docs-nav { position: static; }
  .docs-nav ul { display: flex; flex-wrap: wrap; gap: .25rem; border-left: 0; border-bottom: 1px solid var(--border); padding-bottom: .5rem; }
  .docs-nav a { border-left: 0; margin: 0; padding: .3rem .6rem; border-radius: var(--radius); }
  .docs-nav a:hover { background: var(--bg-elev); }
  .providers-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

@media (max-width: 640px) {
  body { font-size: 14.5px; }
  .container { padding: 0 1rem; }
  h1 { font-size: 1.6rem; }
  .hero h1 { font-size: 1.7rem; }
  .grid-2, .feature-grid, .example-grid, .form-row { grid-template-columns: 1fr; }
  .section { margin: 2.5rem 0; }
  .card { padding: 1rem; }
  .auth { margin: 1rem auto; padding: 1.25rem; }
  .nav { height: 52px; }
  .nav-links a:not(.btn) { padding: .35rem .45rem; }
  .card-header .input-row { width: 100%; }
  .card-header .input-row input { width: auto; }
  .hero-actions .btn { flex: 1 1 auto; }
  .cta-band { padding: 1.25rem; }
  .cta-band .btn { width: 100%; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .pricing-table tr.highlight th::after { display: block; margin: .2rem 0 0; width: max-content; }
}

@media (max-width: 400px) {
  .nav-links { gap: 0; }
  .nav-links a:not(.btn) { padding: .3rem .35rem; font-size: .9rem; }
  .nav-links .btn { margin-left: .15rem; }
  .nav-links .btn-ghost { padding-left: .4rem; padding-right: .4rem; }
  .logo { font-size: .95rem; gap: .35rem; }
  .codeblock pre { font-size: .76rem; padding: .75rem .8rem; padding-right: 4rem; }
  .btn-group .btn { min-width: 0; flex: 1; }
  .input-row { flex-wrap: wrap; }
  .input-row .btn { width: 100%; }
  .table th, .table td { padding: .5rem .5rem; }
  .example-total { font-size: 1.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}