@font-face {
  font-family: 'Montserrat';
  src: url('fonts/Montserrat-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

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

:root {
  --frantz-primary: #0C3F59;
  --frantz-primary-soft: #187FB3;
  --frantz-accent: #F6A321;
  --frantz-coral: #EC624D;
  --frantz-purple: #8378B5;
  --frantz-green: #4CB79A;

  --bg: #ffffff;
  --bg-soft: #f7f9fb;
  --bg-elev: #ffffff;
  --bg-code: #0b1b27;
  --text: #0c1a26;
  --text-soft: #4b5e6e;
  --text-mute: #6b7f8f;
  --border: #e6ecf1;
  --border-soft: #eef2f5;
  --hover: #f1f5f8;
  --link: #14699a;
  --link-hover: var(--frantz-primary);
  --accent-text: #14699a;
  --tag-get: #1f7a45;
  --tag-get-bg: #e5f6ec;
  --tag-post: #1f6fb0;
  --tag-post-bg: #e3f0fb;
  --tag-patch: #8a5a00;
  --tag-patch-bg: #fdf1dc;
  --shadow-sm: 0 1px 2px rgba(12, 63, 89, 0.06);
  --shadow-md: 0 8px 24px rgba(12, 63, 89, 0.08);

  --font-head: 'Montserrat', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a1622;
    --bg-soft: #0e1b2b;
    --bg-elev: #122336;
    --bg-code: #061018;
    --text: #e6edf3;
    --text-soft: #aebccb;
    --text-mute: #8597a8;
    --border: #1c2f44;
    --border-soft: #16273a;
    --hover: #16273a;
    --link: #6cbde8;
    --link-hover: #ffffff;
    --accent-text: #7ec3ea;
    --tag-get: #6fd49b;
    --tag-get-bg: rgba(31, 138, 77, 0.18);
    --tag-post: #6fb6e4;
    --tag-post-bg: rgba(31, 111, 176, 0.18);
    --tag-patch: #f6c177;
    --tag-patch-bg: rgba(246, 163, 33, 0.16);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);

    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--text);
  line-height: 1.25;
  margin: 0 0 0.6rem 0;
  font-weight: 700;
  letter-spacing: -0.01em;
  scroll-margin-top: 80px;
  overflow-wrap: anywhere;
}

h1 { font-size: 2.1rem; letter-spacing: -0.02em; }
h2 { font-size: 1.5rem; margin-top: 2.5rem; }
h3 { font-size: 1.15rem; margin-top: 1.75rem; }

p, li { color: var(--text-soft); }
p { margin: 0 0 1rem 0; }
ul, ol { padding-left: 1.4rem; margin: 0 0 1rem 0; }
li { margin-bottom: 0.3rem; }
strong { color: var(--text); }

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--frantz-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

code, kbd, pre { font-family: var(--font-mono); font-size: 0.875rem; }

:not(pre) > code {
  background: var(--hover);
  color: var(--text);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  border: 1px solid var(--border-soft);
  font-size: 0.85em;
  overflow-wrap: anywhere;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  background: var(--bg-elev);
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  z-index: 100;
}
.skip-link:focus { left: 0.5rem; }

/* ============ Top bar ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.75rem 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--text);
}
.brand:hover { color: var(--text); text-decoration: none; }

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--frantz-primary) 0%, var(--frantz-primary-soft) 100%);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.8rem;
}

.brand-sub {
  font-weight: 400;
  color: var(--text-mute);
  font-size: 0.85rem;
  border-left: 1px solid var(--border);
  padding-left: 0.75rem;
}

.nav-links { display: flex; gap: 1.25rem; font-size: 0.92rem; margin-left: auto; }
.nav-links a {
  color: var(--text-soft);
  font-weight: 500;
  white-space: nowrap;
  padding: 0.4rem 0.1rem;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--text); border-bottom-color: var(--frantz-accent); }

/* ============ Layout ============ */
.docs-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem 1.5rem;
}

main { min-width: 0; }
article { max-width: 780px; min-width: 0; }

.sidebar {
  position: sticky;
  top: 72px;
  align-self: start;
  max-height: calc(100vh - 88px);
  overflow-y: auto;
  font-size: 0.9rem;
}

.sidebar-group { margin-bottom: 1.5rem; }
.sidebar-group-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-mute);
  margin: 0 0 0.4rem 0.6rem;
}
.sidebar a {
  display: block;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  color: var(--text-soft);
  font-weight: 500;
}
.sidebar a:hover { background: var(--hover); color: var(--text); text-decoration: none; }
.sidebar a[aria-current="page"] {
  background: color-mix(in srgb, var(--frantz-primary-soft) 12%, transparent);
  color: var(--accent-text);
  font-weight: 600;
}

.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-text);
  background: color-mix(in srgb, var(--frantz-primary-soft) 12%, transparent);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 0.9rem;
}

.lead { font-size: 1.1rem; color: var(--text-soft); }

.on-this-page {
  border-left: 3px solid var(--border);
  padding: 0.2rem 0 0.2rem 1rem;
  margin: 1.5rem 0 2rem 0;
  font-size: 0.92rem;
}
.on-this-page ol { margin: 0.3rem 0 0 0; padding-left: 1.2rem; }
.on-this-page li { margin-bottom: 0.15rem; }

/* ============ Overview ============ */
.hero { padding: 1rem 0 0.5rem 0; }
.hero h1 { font-size: 2.6rem; max-width: 680px; margin-bottom: 1rem; }
.hero .lead { max-width: 640px; margin-bottom: 1.5rem; }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.05rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--frantz-primary); color: #fff; }
.btn-primary:hover { background: var(--frantz-primary-soft); color: #fff; }
.btn-ghost { color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--frantz-primary-soft); color: var(--accent-text); }

.flow {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 2rem 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  counter-reset: flow;
}
@media (min-width: 1100px) {
  .flow { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 520px) {
  .flow { grid-template-columns: minmax(0, 1fr); }
}
.flow li {
  counter-increment: flow;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  margin: 0;
  font-size: 0.92rem;
}
.flow li::before {
  content: counter(flow);
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--frantz-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  margin-bottom: 0.4rem;
}
.flow li strong { display: block; margin-bottom: 0.15rem; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 2rem 0;
}

.card {
  display: block;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem 1.25rem;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { border-color: var(--frantz-primary-soft); box-shadow: var(--shadow-md); color: inherit; text-decoration: none; }
.card h3 { margin: 0 0 0.35rem 0; font-size: 1.02rem; }
.card p { margin: 0; font-size: 0.9rem; }
.card .more { display: inline-block; margin-top: 0.7rem; color: var(--accent-text); font-weight: 600; font-size: 0.85rem; }

/* ============ Code ============ */
.code-block {
  background: var(--bg-code);
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
  margin: 1rem 0 1.5rem 0;
  box-shadow: var(--shadow-sm);
}

.code-tabs {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.45rem 0.5rem 0 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
}

.code-tab, .code-label {
  background: transparent;
  border: 0;
  color: rgba(230, 237, 243, 0.65);
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  border-radius: 6px 6px 0 0;
  border-bottom: 2px solid transparent;
}
.code-tab { cursor: pointer; }
.code-tab:hover { color: rgba(230, 237, 243, 0.95); }
.code-tab[aria-selected="true"] { color: #fff; border-bottom-color: var(--frantz-accent); }

.code-copy {
  margin-left: auto;
  margin-bottom: 0.35rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(230, 237, 243, 0.8);
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
}
.code-copy:hover { color: #fff; border-color: rgba(255, 255, 255, 0.4); }
.code-copy[data-copied] { color: var(--frantz-green); border-color: var(--frantz-green); }

.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  color: #d6deea;
  line-height: 1.55;
}
.code-block pre code { background: transparent; padding: 0; border: 0; color: inherit; }
.code-pane[hidden] { display: none; }

/* ============ Tables ============ */
.table-wrap { overflow-x: auto; margin: 0.5rem 0 1.5rem 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
  color: var(--text-soft);
}
th {
  font-weight: 600;
  color: var(--text-mute);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
td code { white-space: nowrap; }

.method {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 1px 6px;
  border-radius: 4px;
  margin-right: 0.3rem;
}
.method-get { color: var(--tag-get); background: var(--tag-get-bg); }
.method-post { color: var(--tag-post); background: var(--tag-post-bg); }
.method-patch { color: var(--tag-patch); background: var(--tag-patch-bg); }

/* ============ Callouts ============ */
.callout {
  border-radius: 10px;
  padding: 0.85rem 1.1rem;
  margin: 1rem 0 1.5rem 0;
  border: 1px solid;
  border-left-width: 4px;
  font-size: 0.93rem;
}
.callout p:last-child { margin-bottom: 0; }
.callout.info {
  border-color: color-mix(in srgb, var(--frantz-primary-soft) 35%, transparent);
  background: color-mix(in srgb, var(--frantz-primary-soft) 8%, transparent);
}
.callout.warn {
  border-color: color-mix(in srgb, var(--frantz-accent) 45%, transparent);
  background: color-mix(in srgb, var(--frantz-accent) 10%, transparent);
}

/* ============ Steps ============ */
.steps { counter-reset: step; padding: 0; list-style: none; margin: 1.5rem 0; }
.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 2rem 2.6rem;
  border-left: 2px solid var(--border);
  margin: 0 0 0 0.9rem;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: -16px;
  top: -3px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--frantz-primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
  border: 4px solid var(--bg);
}
.steps h2 { margin-top: 0; font-size: 1.25rem; }

/* ============ Footer ============ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.75rem 1.5rem;
  background: var(--bg-soft);
  color: var(--text-mute);
  font-size: 0.85rem;
}
.site-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: space-between;
}
.site-footer a { color: var(--text-soft); }
.site-footer p { margin: 0; color: var(--text-mute); }

/* ============ Small screens ============ */
@media (max-width: 860px) {
  .docs-layout { grid-template-columns: minmax(0, 1fr); gap: 1rem; padding-top: 1.25rem; }
  .sidebar { order: 2; position: static; max-height: none; border-top: 1px solid var(--border); padding-top: 1.25rem; }
  .sidebar-group { margin-bottom: 0.75rem; }
  td code { white-space: normal; }
  .brand-sub { display: none; }
  .nav-links { gap: 0.9rem; font-size: 0.85rem; }
  .hero h1 { font-size: 2rem; }
  h1 { font-size: 1.75rem; }
}

@media (max-width: 520px) {
  .topbar-inner { padding: 0.6rem 1rem; gap: 0.75rem; }
  .docs-layout { padding-left: 1rem; padding-right: 1rem; }
  .nav-links a.optional { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}