/* ── karsa.app — standalone editorial stylesheet ─────────────────────────────
   Self-contained. Reproduces the relevant tokens from @karsa/ui (tokens.css)
   so this static site matches the Karsa shell without importing app CSS.
   Warm ink/paper palette, single burnt-amber accent, dark default with a
   light (cream) theme honored via prefers-color-scheme.
   ──────────────────────────────────────────────────────────────────────── */

@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Geist:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  /* Raw palette — dark (default) */
  --color-ink:        #0E0D0B;
  --color-paper:      #1A1814;
  --color-paper-2:    #221F1A;
  --color-bright:     #F2EBDC;
  --color-bright-dim: #C9C2B3;
  --color-mute:       #948C7C;
  --color-faint:      #5C564C;
  --color-line:       #2C2823;
  --color-accent:     #D86F3A;
  --color-accent-dim: #8E4926;
  --color-accent-bg:  #2A1B12;
  --color-on-accent:  #F2EBDC;

  --grain-opacity: 0.03;

  --font-display: "Fraunces", "Georgia", serif;
  --font-sans:    "Geist", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

/* Light theme (warm cream) — only when the user prefers light. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --color-ink:        #F5EFE2;
    --color-paper:      #EDE5D2;
    --color-paper-2:    #E1D8C2;
    --color-bright:     #1A1814;
    --color-bright-dim: #3D3934;
    --color-mute:       #6B6358;
    --color-faint:      #A39B8E;
    --color-line:       #C9BFA8;
    --color-accent:     #B8531F;
    --color-accent-dim: #7A3413;
    --color-accent-bg:  #F2E1D2;
    --grain-opacity: 0.05;
  }
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-ink);
  color: var(--color-bright);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

/* Subtle paper grain — mirrors the shell's body::before texture. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.5 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
  mix-blend-mode: overlay;
}

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

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

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--color-line);
  border-radius: 8px;
  border: 2px solid var(--color-ink);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-faint); }

/* ── Layout shell ─────────────────────────────────────────────────────── */

.wrap {
  position: relative;
  z-index: 1;
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 64rem;
  margin: 0 auto;
  padding: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-bright);
}
.brand img { width: 30px; height: 30px; display: block; }
.brand .wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.nav a {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-mute);
  transition: color 120ms ease;
}
.nav a:hover { color: var(--color-accent); }

/* ── Editorial primitives ─────────────────────────────────────────────── */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-mute);
  margin: 0 0 1rem;
}

.section-rule {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-mute);
  margin: 0 0 1.75rem;
}
.section-rule::before, .section-rule::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-line);
}
.section-rule::after { flex: 6; }

.display {
  font-family: var(--font-display);
  font-weight: 500;
  font-optical-sizing: auto;
  font-variation-settings: "opsz" 96, "SOFT" 50;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
}

.lead {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.55;
  color: var(--color-bright-dim);
}

/* ── Hero ─────────────────────────────────────────────────────────────── */

.hero {
  padding: 5rem 0 3.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero .display {
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  max-width: 18ch;
  margin-left: auto;
  margin-right: auto;
}
.hero .lead {
  font-size: clamp(1.0625rem, 2.4vw, 1.375rem);
  max-width: 42ch;
  margin: 1.5rem 0 2.5rem;
}
.hero .accent { color: var(--color-accent); }

/* ── Install CTA ──────────────────────────────────────────────────────── */

.install {
  display: flex;
  align-items: stretch;
  max-width: 32rem;
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  border-radius: 4px;
  overflow: hidden;
}
.install code {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-bright);
  overflow-x: auto;
  white-space: nowrap;
}
.install code .prompt { color: var(--color-accent); user-select: none; }
.copy-btn {
  flex-shrink: 0;
  padding: 0 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: transparent;
  color: var(--color-bright-dim);
  border: 0;
  border-left: 1px solid var(--color-line);
  cursor: pointer;
  transition: color 120ms ease, background-color 120ms ease;
}
.copy-btn:hover { color: var(--color-accent); background: var(--color-paper-2); }
.copy-btn.copied { color: var(--color-accent); }

.install-note {
  margin: 0.85rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-mute);
}

/* ── What-is section ──────────────────────────────────────────────────── */

.section { padding: 3.5rem 0; }

/* ── Demo transcript (illustrative chat) ──────────────────────────────── */

.demo {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: 10px;
  padding: 1.25rem 1.4rem;
  display: grid;
  gap: 1.05rem;
}
.demo-row { display: grid; gap: 0.3rem; }
.demo-role {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--color-mute);
  text-transform: uppercase;
}
.demo-role.you { color: var(--color-accent); }
.demo-msg {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-bright-dim);
  max-width: 60ch;
}
.demo-row:first-child .demo-msg {
  color: var(--color-bright);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}
.demo-caption {
  margin: 0.85rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-mute);
  max-width: 70ch;
}

.bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--color-line);
}
.bullets li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.1rem;
  align-items: baseline;
  padding: 1.25rem 0.25rem;
  border-bottom: 1px solid var(--color-line);
}
.bullets .num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}
.bullets .b-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.0625rem;
  color: var(--color-bright);
  margin: 0 0 0.25rem;
}
.bullets .b-body {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-bright-dim);
}

/* ── Footer ───────────────────────────────────────────────────────────── */

.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-line);
  margin-top: 2rem;
}
.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  padding-bottom: 2rem;
}
.site-footer .copy {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--color-faint);
}
.site-footer a {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-mute);
  transition: color 120ms ease;
}
.site-footer a:hover { color: var(--color-accent); }

/* ── Packages page ────────────────────────────────────────────────────── */

.pkg-head { padding: 3.5rem 0 2rem; }
.pkg-head .display { font-size: clamp(2rem, 5vw, 3rem); }
.pkg-head .lead { font-size: 1.0625rem; max-width: 50ch; margin-top: 1rem; }

.pkg-list {
  list-style: none;
  margin: 0 0 4rem;
  padding: 0;
  border-top: 1px solid var(--color-line);
}
.pkg-row {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 3fr) auto;
  gap: 1.25rem;
  align-items: start;
  padding: 1.25rem 0.5rem;
  border-bottom: 1px solid var(--color-line);
  transition: background-color 120ms ease;
}
.pkg-row:hover { background: var(--color-paper-2); }

.pkg-name {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
}
.pkg-name .name {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--color-bright);
  font-weight: 500;
  word-break: break-all;
}
.pkg-meta { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.pkg-kind {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-mute);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
}
.pkg-version {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
}
.pkg-desc {
  font-size: 0.9375rem;
  color: var(--color-bright-dim);
  min-width: 0;
}
.pkg-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-self: end;
}
.pkg-links a {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-mute);
  white-space: nowrap;
  border-bottom: 1px solid color-mix(in srgb, var(--color-accent) 35%, transparent);
  transition: color 120ms ease, border-color 120ms ease;
}
.pkg-links a:hover { color: var(--color-accent); border-bottom-color: var(--color-accent); }

/* Empty / error / loading states */
.state {
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  border-radius: 4px;
  padding: 2.5rem 2rem;
  text-align: center;
  margin: 1rem 0 4rem;
}
.state .state-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--color-bright);
  margin: 0 0 0.5rem;
}
.state .state-body {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-mute);
}
.state code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--color-bright-dim);
  background: var(--color-paper-2);
  border: 1px solid var(--color-line);
  border-radius: 3px;
  padding: 0.1em 0.4em;
}
.hidden { display: none !important; }

@media (max-width: 640px) {
  .pkg-row { grid-template-columns: 1fr; }
  .pkg-links { justify-self: start; }
  .nav .nav-hide-sm { display: none; }
}

/* ── Overflow containment (mobile) ─────────────────────────────────────
   Wide content scrolls INSIDE its block — it never pushes the page wider
   than the viewport (which would slide every other element's padding
   off-canvas). */
pre {
  overflow-x: auto;
  max-width: 100%;
}
/* Long unbroken strings (package names, URLs, hashes) may break anywhere. */
.pkg-name .name,
.pkg-desc {
  overflow-wrap: anywhere;
}
/* Flex/grid children must be allowed to shrink (the min-width:auto trap —
   a wide child would otherwise expand its container past the viewport). */
.wrap > *,
.pkg-row > * {
  min-width: 0;
}

/* ── Page gutter ────────────────────────────────────────────────────────
   Horizontal padding on the shells (not the inner .wrap) — a single layer
   that holds on every viewport. */
main,
.site-header,
.site-footer {
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}
main .wrap,
.site-footer .wrap {
  padding-left: 0;
  padding-right: 0;
}
/* Eyebrow: tracking-heavy mono runs long on small screens. */
@media (max-width: 640px) {
  .eyebrow { letter-spacing: 0.12em; font-size: 0.625rem; }
}
/* Footer nav groups right, mirroring the header. */
.site-footer .nav { display: flex; gap: 1.25rem; margin-left: auto; }