/* ==========================================================================
   Collov API Docs — Design tokens (Collov Design System v2, Sonic Silver)
   ========================================================================== */

:root {
  /* Sonic Silver ramp */
  --ss-500: #171819;
  --ss-400: #2D3033;
  --ss-300: #44484C;
  --ss-200: #5A6066;
  --ss-100: #71787F;
  --ss-80:  #8D9399;
  --ss-60:  #AAAEB2;
  --ss-40:  #C6C9CC;
  --ss-20:  #E3E4E5;
  --ss-10:  #F1F2F2;
  --ss-05:  #F8F9F9;
  --ss-00:  #FFFFFF;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Elevation */
  --shadow-sm: rgba(0, 0, 0, 0.05) 0px 1px 2px 0px;
  --shadow-md: rgba(0, 0, 0, 0.08) 0px 2px 4px 0px;
  --shadow-lg: rgba(0, 0, 0, 0.1) 0px 4px 12px 0px;
  --shadow-xl: rgba(0, 0, 0, 0.15) 0px 8px 20px 0px;

  /* Layout */
  --header-h: 72px;
  --sidebar-w: 280px;
  --content-max: 860px;
}

/* ==========================================================================
   Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 24px;
  color: var(--ss-300);
  background: var(--ss-00);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, p, ul, ol, table, figure {
  margin: 0;
}

a {
  color: var(--ss-500);
  text-decoration: none;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 16px 40px;
  background: var(--ss-00);
  border-bottom: 1px solid var(--ss-20);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.header-brand .logo img {
  display: block;
  height: 28px;
  width: auto;
}

.header-brand .divider {
  width: 1px;
  height: 24px;
  background: var(--ss-20);
}

.header-brand .doc-label {
  font-size: 16px;
  font-weight: 500;
  color: var(--ss-200);
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons — light variants (on white surfaces) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  line-height: 24px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-secondary {
  background: transparent;
  color: var(--ss-500);
  border: 1px solid var(--ss-500);
}

.btn-secondary:hover { background: rgba(23, 24, 25, 0.06); }
.btn-secondary:active { background: rgba(23, 24, 25, 0.1); }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--ss-20);
  border-radius: 8px;
  cursor: pointer;
  color: var(--ss-300);
}

.menu-toggle:hover { background: var(--ss-05); }

/* ==========================================================================
   Layout — two columns
   ========================================================================== */

.layout {
  display: flex;
  padding-top: var(--header-h);
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: var(--header-h);
  flex: 0 0 var(--sidebar-w);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 40px 20px 60px;
  background: var(--ss-05);
  border-right: 1px solid var(--ss-20);
}

.sidebar::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

.nav-group {
  margin-bottom: 40px;
}

.nav-group:last-child {
  margin-bottom: 0;
}

.nav-group-label {
  display: block;
  padding: 0 12px;
  margin-bottom: 12px;
  font-size: 10px;
  font-weight: 700;
  line-height: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ss-80);
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  color: var(--ss-200);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-link:hover {
  background: rgba(68, 72, 76, 0.06);
  color: var(--ss-500);
}

.nav-link.active {
  background: var(--ss-00);
  color: var(--ss-500);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: var(--ss-500);
}

.nav-method {
  flex: 0 0 auto;
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  padding: 3px 5px;
  border-radius: 4px;
}

.nav-method.get {
  color: var(--ss-300);
  border: 1px solid var(--ss-40);
  background: var(--ss-00);
}

.nav-method.post {
  color: var(--ss-00);
  background: var(--ss-300);
  border: 1px solid var(--ss-300);
}

/* Content column */
.content {
  flex: 1 1 auto;
  min-width: 0;
}

.content-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 60px 40px 80px;
}

/* ==========================================================================
   Typography — content
   ========================================================================== */

.eyebrow {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  line-height: 15px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ss-80);
  margin-bottom: 16px;
}

.page-title {
  font-family: var(--font-sans);
  font-size: 48px;
  font-weight: 600;
  line-height: 56px;
  color: var(--ss-500);
  margin-bottom: 20px;
}

.lead {
  font-size: 16px;
  font-weight: 400;
  line-height: 24px;
  color: var(--ss-200);
}

.section {
  margin-top: 80px;
}

.section-heading {
  font-size: 32px;
  font-weight: 600;
  line-height: 40px;
  color: var(--ss-500);
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--ss-20);
}

.subsection {
  margin-top: 52px;
}

.subsection-heading {
  font-size: 24px;
  font-weight: 600;
  line-height: 32px;
  color: var(--ss-500);
  margin-bottom: 16px;
}

.block-heading {
  font-size: 20px;
  font-weight: 600;
  line-height: 28px;
  color: var(--ss-500);
  margin-top: 40px;
  margin-bottom: 12px;
}

.label-heading {
  font-size: 16px;
  font-weight: 600;
  line-height: 20px;
  color: var(--ss-500);
  margin-top: 24px;
  margin-bottom: 12px;
}

.content p {
  margin-bottom: 16px;
}

.content p:last-child {
  margin-bottom: 0;
}

.content ul,
.content ol {
  padding-left: 24px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.content li::marker {
  color: var(--ss-80);
}

.content strong {
  font-weight: 600;
  color: var(--ss-500);
}

code.inline {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ss-500);
  background: var(--ss-10);
  border: 1px solid var(--ss-20);
  border-radius: 4px;
  padding: 1px 6px;
  white-space: nowrap;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 24px 0;
}

.feature-card {
  background: var(--ss-05);
  border: 1px solid var(--ss-20);
  border-radius: 12px;
  padding: 40px;
  transition: background-color 0.15s ease;
}

.feature-card:hover {
  background: var(--ss-00);
  box-shadow: rgba(0, 0, 0, 0.03) 0px 1px 4px 0px;
}

.feature-card.has-image {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--ss-20);
  background: var(--ss-10);
}

.card-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-card .card-body {
  padding: 24px;
}

.feature-card .card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 20px;
  border-radius: 8px;
  background: var(--ss-500);
  color: var(--ss-00);
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 20px;
  color: var(--ss-500);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  line-height: 22px;
  color: var(--ss-200);
  margin: 0;
}

/* Notice / callout */
.notice {
  display: flex;
  gap: 12px;
  background: var(--ss-05);
  border: 1px solid var(--ss-20);
  border-radius: 12px;
  padding: 20px;
  margin: 24px 0;
}

.notice .notice-icon {
  flex: 0 0 auto;
  color: var(--ss-100);
  margin-top: 2px;
}

.notice p {
  margin: 0;
  font-size: 14px;
  line-height: 22px;
  color: var(--ss-300);
}

/* Numbered step cards */
.steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0;
}

.step {
  display: flex;
  gap: 16px;
  background: var(--ss-00);
  border: 1px solid var(--ss-20);
  border-radius: 12px;
  padding: 20px;
}

.step-num {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ss-500);
  color: var(--ss-00);
  font-size: 12px;
  font-weight: 600;
}

.step-body h4 {
  font-size: 16px;
  font-weight: 600;
  line-height: 20px;
  color: var(--ss-500);
  margin-bottom: 6px;
}

.step-body p {
  font-size: 14px;
  line-height: 22px;
  color: var(--ss-200);
  margin: 0;
}

.step-body code.inline {
  font-size: 12.5px;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 4px 12px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  background: var(--ss-05);
  border: 1px solid var(--ss-20);
  color: var(--ss-300);
}

.badge-dark {
  background: var(--ss-300);
  border: none;
  color: var(--ss-00);
  font-weight: 600;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 24px;
}

/* ==========================================================================
   Endpoint components
   ========================================================================== */

.endpoint-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--ss-05);
  border: 1px solid var(--ss-20);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 20px 0;
}

.method {
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  padding: 6px 10px;
  border-radius: 6px;
}

.method.get {
  color: var(--ss-300);
  background: var(--ss-00);
  border: 1px solid var(--ss-40);
}

.method.post {
  color: var(--ss-00);
  background: var(--ss-300);
}

.endpoint-url {
  flex: 1 1 auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ss-500);
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.endpoint-url::-webkit-scrollbar { display: none; }

.icon-btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 32px;
  min-width: 32px;
  padding: 0 8px;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--ss-80);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.icon-btn:hover {
  color: var(--ss-500);
  background: rgba(68, 72, 76, 0.08);
}

.icon-btn.copied {
  color: var(--ss-500);
}

/* Parameter tables */
.param-table-wrap {
  overflow-x: auto;
  margin: 16px 0 24px;
  border: 1px solid var(--ss-20);
  border-radius: 12px;
}

.param-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 22px;
}

.param-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ss-80);
  background: var(--ss-05);
  padding: 12px 16px;
  border-bottom: 1px solid var(--ss-20);
  white-space: nowrap;
}

.param-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--ss-10);
  vertical-align: top;
  color: var(--ss-300);
}

.param-table tr:last-child td {
  border-bottom: none;
}

.param-table td:first-child {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ss-500);
  white-space: nowrap;
}

.param-table .type {
  color: var(--ss-100);
  font-size: 13px;
  white-space: nowrap;
}

.req {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
}

.req.yes {
  color: var(--ss-00);
  background: var(--ss-300);
}

.req.no {
  color: var(--ss-100);
  border: 1px solid var(--ss-40);
}

/* Enum chips */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.chip {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1;
  color: var(--ss-300);
  background: var(--ss-10);
  border: 1px solid var(--ss-20);
  border-radius: 10px;
  padding: 4px 8px;
  white-space: nowrap;
}

/* ==========================================================================
   Code panels
   ========================================================================== */

.code-panel {
  background: var(--ss-500);
  border-radius: 12px;
  margin: 20px 0 24px;
  overflow: hidden;
}

.code-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 8px 6px 6px;
  border-bottom: 1px solid var(--ss-400);
}

.code-tabs {
  display: flex;
  gap: 2px;
}

.code-tab {
  height: 32px;
  padding: 0 12px;
  background: transparent;
  border: none;
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--ss-60);
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.code-tab:hover { color: var(--ss-00); }

.code-tab.active {
  color: var(--ss-00);
  background: var(--ss-400);
}

.code-lang-label {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  color: var(--ss-60);
  padding-left: 10px;
}

.code-panel .icon-btn {
  color: var(--ss-60);
}

.code-panel .icon-btn:hover {
  color: var(--ss-00);
  background: rgba(255, 255, 255, 0.08);
}

.code-panel .icon-btn.copied {
  color: var(--ss-00);
}

.code-body {
  display: none;
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 21px;
  color: var(--ss-10);
  tab-size: 4;
}

.code-body.active {
  display: block;
}

.code-body code {
  font-family: inherit;
}

/* Monochrome syntax highlighting — Sonic Silver light steps only */
.tok-comment { color: var(--ss-100); font-style: italic; }
.tok-string  { color: var(--ss-60); }
.tok-keyword { color: var(--ss-00); font-weight: 600; }
.tok-number  { color: var(--ss-40); }
.tok-key     { color: var(--ss-00); }
.tok-punct   { color: var(--ss-80); }

/* Collapsible response */
.code-panel.collapsed .code-body.active {
  display: block;
  max-height: 264px;
  overflow: hidden;
  position: relative;
}

.code-expand {
  display: none;
  width: 100%;
  padding: 10px;
  background: var(--ss-400);
  border: none;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  color: var(--ss-60);
  cursor: pointer;
  transition: color 0.15s ease;
}

.code-expand:hover { color: var(--ss-00); }

.code-panel.collapsible .code-expand {
  display: block;
}

/* ==========================================================================
   Resources / footer
   ========================================================================== */

.resource-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}

.resource-card {
  display: block;
  background: var(--ss-00);
  border: 1px solid var(--ss-20);
  border-radius: 12px;
  padding: 20px;
  transition: border-color 0.15s ease;
}

.resource-card:hover {
  border-color: var(--ss-80);
}

.resource-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ss-500);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.resource-card p {
  font-size: 14px;
  line-height: 22px;
  color: var(--ss-200);
  margin: 0;
}

.site-footer {
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid var(--ss-20);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-footer .logo img {
  display: block;
  height: 20px;
  width: auto;
  opacity: 0.85;
}

.site-footer p {
  font-size: 12px;
  line-height: 18px;
  color: var(--ss-80);
  margin: 0;
}

/* ==========================================================================
   Sidebar overlay (mobile)
   ========================================================================== */

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: rgba(23, 24, 25, 0.4);
  z-index: 39;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1023px) {
  .site-header {
    padding: 16px 24px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-actions .btn-secondary {
    display: none;
  }

  .sidebar {
    position: fixed;
    top: var(--header-h);
    left: 0;
    bottom: 0;
    z-index: 40;
    width: var(--sidebar-w);
    height: auto;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: none;
  }

  body.nav-open .sidebar {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }

  body.nav-open .sidebar-overlay {
    display: block;
  }

  .content-inner {
    padding: 40px 24px 60px;
  }

  .page-title {
    font-size: 36px;
    line-height: 44px;
  }

  .section { margin-top: 60px; }
}

@media (max-width: 639px) {
  .site-header {
    padding: 12px 16px;
  }

  .header-brand .doc-label { display: none; }
  .header-brand .divider { display: none; }

  .btn {
    height: 44px;
    padding: 10px 16px;
    font-size: 14px;
  }

  .content-inner {
    padding: 32px 16px 48px;
  }

  .page-title {
    font-size: 28px;
    line-height: 36px;
    margin-bottom: 16px;
  }

  .section { margin-top: 48px; }
  .subsection { margin-top: 40px; }

  .section-heading {
    font-size: 24px;
    line-height: 32px;
  }

  .subsection-heading {
    font-size: 20px;
    line-height: 28px;
  }

  .card-grid,
  .resource-links {
    grid-template-columns: 1fr;
  }

  .feature-card { padding: 24px; }
  .feature-card.has-image { padding: 0; }

  .code-body {
    padding: 16px;
    font-size: 12px;
    line-height: 19px;
  }
}