/* ============================================================
   Coworker Web — Design tokens v2
   Flat, disciplined, engineer-grade. No decorative gradients.
   ============================================================ */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", "Noto Serif", serif;
  --font-mono: "Cascadia Code", "SF Mono", Consolas, "Courier New", monospace;

  --green-700: #175d3b;
  --green-600: #1f7a4d;
  --green-500: #2f9e63;
  --green-400: #4cb982;
  --green-300: #86d0a4;
  --green-050: #eef8f1;
  --warm: #c25536;
}

:root[data-theme="light"] {
  --bg: #faf9f6;
  --bg-alt: #f3f1ea;
  --bg-deep: #0e1710;
  --surface: #ffffff;
  --surface-2: #f6f5f0;
  --ink: #1c2019;
  --ink-heading: #0d110c;
  --muted: #4d554c;
  --faint: #757f74;
  --line: #e6e4dc;
  --line-strong: #d2cfc4;
  --accent: var(--green-600);
  --accent-hover: #17653f;
  --accent-soft: var(--green-050);
  --on-accent: #ffffff;
  --code-bg: #10160f;
  --code-ink: #d9eede;
  --header-glass: rgba(250, 249, 246, 0.85);
  --shadow-sm: 0 1px 2px rgba(20, 26, 18, 0.05);
  --shadow-md: 0 4px 16px rgba(20, 26, 18, 0.07), 0 12px 40px rgba(20, 26, 18, 0.06);
  --shadow-lg: 0 24px 64px rgba(20, 26, 18, 0.16);
  --ok: #1f7a4d;
  --warn: #b45309;
  --danger: #b3261e;
}

:root[data-theme="dark"] {
  --bg: #0c0f0b;
  --bg-alt: #11150e;
  --bg-deep: #070a06;
  --surface: #141a12;
  --surface-2: #191f16;
  --ink: #e7ebe4;
  --ink-heading: #f4f7f1;
  --muted: #adb8ab;
  --faint: #82907f;
  --line: #232920;
  --line-strong: #353e2d;
  --accent: var(--green-400);
  --accent-hover: #9fdcb6;
  --accent-soft: rgba(76, 185, 130, 0.1);
  --on-accent: #0c130d;
  --code-bg: #090c07;
  --code-ink: #cfe8d6;
  --header-glass: rgba(12, 15, 11, 0.85);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45), 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.6);
  --ok: #6fce95;
  --warn: #e8a449;
  --danger: #ef8a83;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1;
}

h1, h2, h3, h4 {
  color: var(--ink-heading);
  font-weight: 650;
  letter-spacing: -0.018em;
  text-wrap: balance;
  margin: 0;
}

h1 em, h2 em, .serif-accent {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 500;
  letter-spacing: 0;
}

p { margin: 0; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--line);
  white-space: nowrap;
}
@media (max-width: 640px) {
  code { white-space: normal; overflow-wrap: anywhere; }
}

pre {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  max-width: 100%;
  font-size: 13px;
  line-height: 1.65;
  border: 1px solid var(--line);
}
pre code { background: none; border: 0; color: inherit; padding: 0; font-size: inherit; white-space: pre; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 28px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--accent);
  transform: rotate(45deg);
}

/* ── Icon system: 24 grid, 1.8 stroke, round joins ──────── */

.icon { width: 18px; height: 18px; flex: 0 0 auto; }
.icon-sm { width: 15px; height: 15px; }
.icon-lg { width: 22px; height: 22px; }

/* ── Buttons ────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 11px;
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease,
              transform 0.18s ease, box-shadow 0.18s ease;
}
.btn .icon { transition: transform 0.2s cubic-bezier(0.2, 0.7, 0.3, 1); }
.btn:hover .icon-arrow { transform: translateX(3px); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow-md); }
.btn-primary:hover { background: var(--accent-hover); color: var(--on-accent); box-shadow: var(--shadow-lg); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.back-to-top { position: fixed; right: 22px; bottom: 22px; z-index: 90; width: 42px; height: 42px; border: 1px solid var(--line-strong); border-radius: 12px; background: var(--surface); color: var(--accent); box-shadow: var(--shadow-md); display: grid; place-items: center; cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .2s, transform .2s, background .2s; }
.back-to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.back-to-top:hover { background: var(--accent-soft); }
.back-to-top svg { width: 18px; height: 18px; }
@media (max-width: 700px) {
  .back-to-top { right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); width: 48px; height: 48px; }
}

/* ── Header controls ────────────────────────────────────── */

/* Logo tile: brackets + caret — drawn not typed. Shared by all pages. */
.logo-mark {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--ink-heading);
  display: grid;
  place-items: center;
  overflow: hidden;
  flex: 0 0 auto;
}
.logo-mark svg { width: 19px; height: 19px; }
.logo-mark.app-logo { object-fit: contain; background: transparent; border: 0; padding: 0; }
.logo-mark .lm-caret { stroke: var(--green-400); }
:root[data-theme="dark"] .logo-mark { background: var(--surface-2); border: 1px solid var(--line-strong); }

/* ── Header layout (shared: landing + docs) ────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-glass);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border-bottom: 1px solid var(--line);
}
@supports (view-transition-name: root) {
  ::view-transition-image-pair(root) { isolation: auto; }
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; display: block; }
}
.site-header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 13px 28px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  font-size: 16px;
  color: var(--ink-heading);
  letter-spacing: -0.012em;
  text-decoration: none;
}
.site-brand:hover { color: var(--ink-heading); }
.site-nav { display: flex; gap: 2px; margin-left: auto; align-items: center; }
.site-nav a {
  padding: 8px 13px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 550;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
}
.site-nav a:hover { color: var(--ink-heading); background: var(--surface-2); }
.site-nav a.nav-cta { color: var(--accent); font-weight: 620; }
.site-nav a.nav-cta:hover { background: var(--accent-soft); }
.mobile-menu-toggle.hdr-control, .mobile-site-menu { display: none; }
.mobile-menu-toggle .menu-line { transform-box: fill-box; transform-origin: center; transition: transform .24s ease, opacity .16s ease; }
.mobile-menu-toggle[aria-expanded="true"] .menu-line-top { transform: translateY(5px) rotate(45deg); }
.mobile-menu-toggle[aria-expanded="true"] .menu-line-middle { opacity: 0; transform: scaleX(0); }
.mobile-menu-toggle[aria-expanded="true"] .menu-line-bottom { transform: translateY(-5px) rotate(-45deg); }
@media (max-width: 700px) {
  .site-header-inner { gap: 9px; padding: 11px 16px; }
  .site-brand { margin-right: auto; }
  .site-nav { margin-left: 0; }
  .site-nav > a { display: none !important; }
  .mobile-menu-toggle.hdr-control { display: inline-grid; flex: 0 0 auto; }
  .mobile-site-menu { display: grid; gap: 3px; position: absolute; top: 100%; left: 0; right: 0; padding: 10px 16px 16px; background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: var(--shadow-md); max-height: calc(100dvh - 64px); overflow-y: auto; opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(-8px); transition: opacity .22s ease, transform .22s ease, visibility .22s ease; }
  .mobile-site-menu.open { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
  .mobile-site-menu a { display: block; padding: 11px 12px; border-radius: 8px; color: var(--ink); font-size: 14px; font-weight: 550; }
  .mobile-site-menu a:hover, .mobile-site-menu a:focus-visible { background: var(--accent-soft); color: var(--accent); }
  .mobile-site-menu .badge { margin-left: 6px; }
}

.hdr-control {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.18s, border-color 0.18s, background 0.18s, transform 0.18s;
}
.hdr-control:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.hdr-control:active { transform: scale(0.94); }
.hdr-control .icon { width: 17px; height: 17px; }
:root[data-theme="light"] .icon-sun { display: none; }
:root[data-theme="dark"] .icon-moon { display: none; }

.lang-toggle {
  display: inline-flex;
  align-items: center;
  height: 38px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: transparent;
  padding: 0 5px;
  gap: 2px;
  cursor: pointer;
}
.lang-toggle span {
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.02em;
  color: var(--faint);
  transition: color 0.18s, background 0.18s;
}
.lang-toggle span.on { color: var(--accent); background: var(--accent-soft); }

/* ── Reveal engine (site.js drives .rv) ─────────────────── */

.motion-ready .rv { opacity: 0; transform: translateY(14px); transition: opacity 0.5s cubic-bezier(0.2, 0.6, 0.2, 1), transform 0.5s cubic-bezier(0.2, 0.6, 0.2, 1); transition-delay: var(--d, 0ms); }
.motion-ready .rv-blur { filter: blur(5px); transition: opacity 0.55s ease, transform 0.55s ease, filter 0.55s ease; transition-delay: var(--d, 0ms); }
.motion-ready .rv-scale { transform: translateY(10px) scale(0.985); }
.motion-ready .rv-left { transform: translateX(-18px); }
.motion-ready .rv-right { transform: translateX(18px); }
.rv.in { opacity: 1; transform: none; filter: none; }

/* Scroll progress bar */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform-origin: 0 50%;
  transform: scaleX(0);
  z-index: 300;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv, .rv-blur, .rv-scale, .rv-left, .rv-right { opacity: 1 !important; transform: none !important; filter: none !important; transition: none !important; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

::selection { background: var(--accent); color: var(--on-accent); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ── Mobile: long code wraps instead of page overflow ───── */
@media (max-width: 640px) {
  pre { white-space: pre-wrap; overflow-wrap: anywhere; }
  pre code { white-space: inherit; }
}