/*
 * JarskyLab shared CSS — tokens + typography + navbar
 * Mirrors app/globals.css :root + base styles + components/Navbar.module.css
 * Keep in sync manually when main site palette/typography changes.
 */

@font-face {
  font-family: 'Onest';
  src: url('/fonts/Onest/Onest-VariableFont_wght.ttf') format('truetype-variations'),
       url('/fonts/Onest/Onest-VariableFont_wght.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --palette-cream:      #F5E9D8;
  --palette-brown-dark: #3E2C23;
  --palette-orange:     #E76F2E;
  --palette-blue:       #2FA4D7;

  --bg-primary: #FDF9F0;
  --bg-secondary: #F6EEDB;
  --bg-tertiary: #F0E6CC;
  --bg-elevated: #FFFDF7;
  --bg-muted: #FAF4E5;
  --bg-overlay: rgba(253, 249, 240, 0.98);
  --bg-backdrop: rgba(253, 249, 240, 0.90);
  --bg-accent: rgba(231, 111, 46, 0.10);
  --bg-accent-strong: rgba(231, 111, 46, 0.15);
  --bg-surface: #F6EEDB;
  --bg-hover: #F0E6CC;

  --border: #C7B093;
  --border-hover: #B09877;
  --border-active: #E76F2E;
  --border-strong: #8C7256;
  --border-subtle: #D4C0A5;
  --border-faint: #DECDB1;
  --border-muted: #E7D6BE;

  --text-primary: #3E2C23;
  --text-secondary: #5F4838;
  --text-tertiary: #83695A;
  --text-muted: #A4907E;
  --text-link: #2FA4D7;
  --text-inverted: #F5E9D8;

  --accent: #E76F2E;
  --accent-hover: #D45D1F;
  --accent-active: #BD4E13;
  --accent-subtle: rgba(231, 111, 46, 0.18);
  --accent-muted: rgba(231, 111, 46, 0.10);

  --cta: #E76F2E;
  --cta-hover: #D45D1F;
  --cta-active: #BD4E13;
  --cta-text: #FFFFFF;

  --success: #1a7f37;
  --warning: #9a6700;
  --error: #cf222e;
  --info: #2FA4D7;

  --space-0: 0;
  --space-0_5: 4px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-7: 56px;
  --space-8: 64px;
  --space-9: 72px;
  --space-10: 80px;
  --space-11: 96px;
  --space-12: 112px;

  --transition: 0.15s ease;

  --content-max-width: 1120px;

  --radius: 6px;
  --radius-sm: 4px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Onest', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
  letter-spacing: -0.015em;
  margin: 0;
}

h1 {
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 24px;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 18px;
}

button {
  font-family: inherit;
}

/* ============================================================
 * NAVBAR — mirrors components/Navbar.module.css
 * ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-primary);
}

.nav-logo-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition), background-color var(--transition);
  border-radius: var(--radius-sm);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-link[aria-current="page"] {
  color: var(--text-primary);
  font-weight: 600;
  background: var(--bg-secondary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 72px;
  justify-content: flex-end;
}

/* Language switcher — matches main-site .navbarLogo pill */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-decoration: none;
  cursor: pointer;
}

.lang-switcher:hover {
  border-color: var(--border-hover);
}

.lang-switcher .lang-option {
  color: var(--text-tertiary);
}

.lang-switcher .lang-option.active {
  color: var(--text-primary);
  font-weight: 600;
}

.lang-switcher .lang-divider {
  color: var(--text-tertiary);
  margin: 0 2px;
}

.nav-back {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.nav-back:hover {
  color: var(--text-primary);
}

.nav-spacer {
  height: 64px;
}

@media (max-width: 768px) {
  .nav { height: 60px; }
  .nav-container { padding: 0 var(--space-3); gap: var(--space-2); }
  .nav-spacer { height: 60px; }
}

@media (max-width: 960px) {
  .nav-links { display: none; }
}

/* ============================================================
 * Collapsible SEO sections — keyword lists and category indexes
 * collapsed by default. Google indexes the contents inside
 * <details>; this is not cloaking, just a UX-friendly disclosure.
 * ============================================================ */

.seo-details {
  margin: 12px 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  background: var(--bg-muted);
}

.seo-details > summary {
  padding: 10px 16px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  list-style: none;
  user-select: none;
}

.seo-details > summary::-webkit-details-marker { display: none; }

.seo-details > summary::after {
  content: '+';
  float: right;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-tertiary);
  transition: transform var(--transition);
  line-height: 1;
}

.seo-details[open] > summary::after { content: '−'; }

.seo-details[open] > summary {
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-faint);
}

.seo-details > *:not(summary) {
  padding: 10px 16px 14px;
}

.seo-details ul,
.seo-details .category-links,
.seo-details .query-list {
  margin: 0;
  padding: 10px 16px 14px;
}

/* ============================================================
 * Editorial primitives — mirror app/globals.css + components/ui/
 * Used by demo-host pages (demos.jarskylab.ru index, /guardrail/,
 * /svg-search/) so the static site stays visually identical to the
 * Next.js /demos page on jarskylab.ru.
 * ============================================================ */

.container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.display {
  font-size: 64px;
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin: 0;
}

.display-compact {
  font-size: 48px;
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin: 0;
}

@media (max-width: 768px) {
  .display { font-size: 40px; letter-spacing: -0.03em; }
  .display-compact { font-size: 32px; letter-spacing: -0.025em; }
}

.lead {
  font-size: 19px;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
  max-width: 64ch;
}

@media (max-width: 768px) {
  .lead { font-size: 17px; }
}

.eyebrow,
.mono {
  display: inline-block;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin: 0;
}

.page-header {
  padding: var(--space-7) 0 var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (max-width: 768px) {
  .page-header { padding: var(--space-5) 0 var(--space-3); }
}

.page-section {
  padding: var(--space-7) 0;
}

@media (max-width: 768px) {
  .page-section { padding: var(--space-5) 0; }
}

/* Demo grid + card — mirrors app/demos/demos.module.css */

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-3);
}

.demo-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius);
  color: var(--text-primary);
  text-decoration: none;
  background: var(--bg-primary);
  transition: border-color var(--transition), background-color var(--transition);
}

.demo-card:hover {
  border-color: var(--border);
  background: var(--bg-muted);
  text-decoration: none;
}

.demo-card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-2);
}

.demo-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.demo-status .demo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted, var(--text-tertiary));
  flex-shrink: 0;
}

.demo-status.live {
  color: var(--success);
}

.demo-status.live .demo-dot {
  background: var(--success);
  box-shadow: 0 0 0 3px rgba(26, 127, 55, 0.18);
}

.demo-card h2 {
  margin: var(--space-1) 0 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--text-primary);
}

.demo-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.55;
}

.demo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.demo-tag {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 11px;
  padding: 2px 6px;
  border: 1px solid var(--border-faint);
  border-radius: 3px;
  color: var(--text-tertiary);
}

.demo-action {
  margin-top: var(--space-1);
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
}