/* Clikkin — shared styles mirroring the design system (public/design-system/CLAUDE.md) */

:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --bg-tertiary: #F3F4F6;
  --bg-overlay: rgba(0,0,0,0.32);

  --text-primary: #18181B;
  --text-secondary: #52525B;
  --text-tertiary: #A1A1AA;

  --brand-red: #D41E40;
  --brand-red-hover: #B91C38;
  --brand-red-light: #FEE2E8;
  --brand-red-lighter: #FFF1F3;

  --success: #16A34A;
  --success-light: #EAF3DE;
  --success-text: #3B6D11;

  --border-primary: #E5E7EB;
  --border-secondary: #D1D5DB;
  --border-tertiary: #F0F0F0;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Instrument Serif', 'Iowan Old Style', 'Apple Garamond', Georgia, serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --max-w: 1180px;
  --gutter: clamp(20px, 4vw, 40px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
img, svg { display: block; max-width: 100%; }

::selection { background: var(--brand-red-light); color: var(--brand-red-hover); }

/* Wrapper */
.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ───────── Top nav ───────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.78);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--border-tertiary);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  color: var(--brand-red);
}
.nav-logo svg { height: 22px; width: auto; }
.nav-links {
  display: flex;
  gap: 2px;
  align-items: center;
}
.nav-links a {
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: background .15s, color .15s;
}
.nav-links a:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.nav-links a.active { color: var(--text-primary); font-weight: 500; }
.nav-cta {
  background: var(--brand-red);
  color: #fff !important;
  padding: 9px 16px !important;
  font-weight: 600 !important;
  font-size: 14px !important;
}
.nav-cta:hover { background: var(--brand-red-hover) !important; }

.nav-toggle { display: none; background: none; border: none; padding: 8px; }
@media (max-width: 780px) {
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ───────── Buttons ───────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 0.5px solid transparent;
  transition: background .15s, border-color .15s, color .15s, transform .1s;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand-red); color: #fff; }
.btn-primary:hover { background: var(--brand-red-hover); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-secondary);
}
.btn-outline:hover { border-color: var(--text-primary); }
.btn-lg { padding: 16px 28px; font-size: 16px; }

/* ───────── Pills / chips ───────── */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 0.5px solid var(--border-primary);
}
.pill-accent {
  background: var(--brand-red-light);
  color: var(--brand-red);
  border-color: transparent;
}
.pill-success {
  background: var(--success-light);
  color: var(--success-text);
  border-color: transparent;
}

/* Eyebrow / section label */
.eyebrow {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

/* ───────── Type utilities ───────── */
.h-display {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(56px, 9vw, 112px);
  line-height: 0.98;
  letter-spacing: -0.02em;
}
.h1 {
  font-size: clamp(40px, 5.5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
}
.h2 {
  font-size: clamp(30px, 3.8vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.lede {
  font-size: clamp(17px, 1.5vw, 20px);
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 60ch;
  text-wrap: pretty;
}
.muted { color: var(--text-secondary); }
.text-accent { color: var(--brand-red); }

/* ───────── Sections ───────── */
.section {
  padding: clamp(64px, 9vw, 120px) 0;
}
.section-sm { padding: clamp(48px, 6vw, 80px) 0; }

/* ───────── Card ───────── */
.card {
  background: #fff;
  border: 0.5px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 20px;
}

/* ───────── Scroll reveal ───────── */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ───────── Footer ───────── */
.footer {
  border-top: 0.5px solid var(--border-tertiary);
  padding: 56px 0 40px;
  background: var(--bg-secondary);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.4fr;
  gap: 40px;
  align-items: start;
}
@media (max-width: 780px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
.footer-tag { color: var(--text-secondary); font-size: 14px; margin-top: 12px; max-width: 28ch; }
.footer-links { display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--text-primary); }
.footer-col h4 {
  margin: 0 0 14px;
  font-size: 11px; font-weight: 600;
  color: var(--text-tertiary);
  letter-spacing: 0.09em; text-transform: uppercase;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 0.5px solid var(--border-primary);
  font-size: 12px;
  color: var(--text-tertiary);
}
.lang-select {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 0.5px solid var(--border-secondary);
  border-radius: var(--radius-full);
  padding: 6px 12px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
}
.newsletter-inline {
  display: flex;
  gap: 8px;
}
.newsletter-inline input {
  flex: 1;
  min-width: 0;
  background: #fff;
  border: 0.5px solid var(--border-secondary);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  font: inherit;
  color: var(--text-primary);
}
.newsletter-inline input:focus {
  outline: none;
  border-color: var(--brand-red);
  box-shadow: 0 0 0 3px var(--brand-red-light);
}
.newsletter-inline button {
  background: var(--text-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
}
.newsletter-inline button:hover { background: #000; }

/* ───────── Shared page-level utilities ───────── */
.page-hero { padding: clamp(48px, 6vw, 72px) 0 clamp(32px, 4vw, 48px); }
.page-hero h1 { margin: 14px 0 0; font-size: clamp(44px, 6vw, 72px); font-family: var(--font-serif); font-weight: 400; letter-spacing: -0.02em; line-height: 1.02; }
.page-hero h1 em { font-style: italic; color: var(--brand-red); }
.page-hero .lede { margin-top: 22px; }

.breadcrumbs { display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--text-tertiary); margin-bottom: 24px; font-family: var(--font-mono); }
.breadcrumbs a { color: var(--text-secondary); }
.breadcrumbs a:hover { color: var(--text-primary); }
.breadcrumbs .sep { opacity: 0.5; }

.tag { display: inline-block; padding: 3px 10px; border-radius: var(--radius-full); font-size: 11px; font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase; background: var(--bg-tertiary); color: var(--text-secondary); }
.tag.engineering { background: #E8F1FE; color: #1E40AF; }
.tag.policy { background: #FDF4E3; color: #8A5A11; }
.tag.release { background: var(--brand-red-light); color: var(--brand-red); }
.tag.story { background: #E8F6F0; color: #16734A; }
.tag.principle { background: #F2EFEA; color: #5C4A2A; }

.input, .textarea, .select {
  width: 100%; background: #fff;
  border: 0.5px solid var(--border-secondary);
  border-radius: var(--radius-md); padding: 12px 14px;
  font: inherit; color: var(--text-primary);
}
.input:focus, .textarea:focus, .select:focus {
  outline: none; border-color: var(--brand-red);
  box-shadow: 0 0 0 3px var(--brand-red-light);
}
.textarea { min-height: 140px; resize: vertical; line-height: 1.5; }
.field-label { display: block; font-size: 13px; font-weight: 500; color: var(--text-primary); margin-bottom: 6px; }
.field-hint { font-size: 12px; color: var(--text-tertiary); margin-top: 6px; }
.field { margin-bottom: 18px; }

.kbd { display: inline-block; font-family: var(--font-mono); font-size: 11px; padding: 2px 6px; background: var(--bg-tertiary); border: 0.5px solid var(--border-primary); border-radius: 4px; color: var(--text-secondary); }

.search-box { position: relative; }
.search-box input { padding-left: 42px; height: 52px; font-size: 15px; }
.search-box svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-tertiary); }

.prose { font-size: 16px; line-height: 1.7; color: var(--text-primary); max-width: 70ch; }
.prose p { margin: 0 0 18px; }
.prose h2 { font-size: 28px; font-weight: 700; letter-spacing: -0.01em; margin: 48px 0 16px; }
.prose h3 { font-size: 20px; font-weight: 600; margin: 32px 0 12px; letter-spacing: -0.01em; }
.prose h4 { font-size: 15px; font-weight: 600; margin: 24px 0 8px; }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 22px; }
.prose li { margin-bottom: 6px; }
.prose strong { font-weight: 600; color: var(--text-primary); }
.prose code { font-family: var(--font-mono); font-size: 13px; background: var(--bg-tertiary); padding: 2px 6px; border-radius: 4px; }
.prose pre { background: var(--text-primary); color: #E5E7EB; font-family: var(--font-mono); font-size: 13px; padding: 18px 20px; border-radius: var(--radius-md); overflow-x: auto; line-height: 1.55; margin: 20px 0; }
.prose pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }
.prose blockquote { border-left: 2px solid var(--brand-red); padding: 2px 0 2px 20px; margin: 24px 0; font-family: var(--font-serif); font-style: italic; font-size: 22px; color: var(--text-primary); line-height: 1.4; }
.prose hr { border: none; border-top: 0.5px solid var(--border-primary); margin: 48px 0; }
.prose a { color: var(--brand-red); border-bottom: 1px solid transparent; transition: border-color .15s; }
.prose a:hover { border-bottom-color: var(--brand-red); }

.divider { border: none; border-top: 0.5px solid var(--border-primary); margin: 0; }