/* ============================================================
   Arcturus — GitHub Pages site
   Warm editorial dark, ported from apps/web design tokens (v3).
   Depth comes from hairlines and surface steps — never shadows.
   ============================================================ */

:root {
  /* colors — mirrored from apps/web/src/shared/styles/tokens/colors.ts */
  --accent: #d9823b;
  --accent-bright: #eb9a55;
  --accent-wash: rgba(217, 130, 59, 0.12);
  --cream: #ede9e0;
  --void: #111008;
  --surface-1: #17150e;
  --surface-2: #1d1a12;
  --surface-3: #242017;
  --black: #0b0a06;
  --hairline: rgba(237, 233, 224, 0.09);
  --hairline-strong: rgba(237, 233, 224, 0.2);
  --text: #ede9e0;
  --text-muted: #857f74;
  --text-faint: #5a564c;
  --on-cream: #16140d;
  --status-running: #4fbf67;
  --status-failed: #e5564a;

  /* type */
  --font-text: "Geist", system-ui, -apple-system, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-serif: "Instrument Serif", Georgia, serif;

  /* motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);

  --content: 1020px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  background: var(--void);
  color: var(--text);
  font-family: var(--font-text);
  font-size: 15px;
  line-height: 1.55;
  letter-spacing: -0.15px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 150ms var(--ease);
}

a:hover {
  color: var(--accent-bright);
}

code,
pre,
kbd {
  font-family: var(--font-mono);
  font-size: 0.86em;
}

p code,
li code,
td code {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 5px;
  padding: 1px 5px;
  color: var(--cream);
  overflow-wrap: anywhere;
}

.wrap {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------------------------------------------------------- nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(17, 16, 8, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 60px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.28px;
  color: var(--text);
}

.wordmark:hover {
  color: var(--text);
}

.wordmark .star {
  color: var(--accent);
  font-size: 15px;
  transition: transform 400ms var(--ease);
}

.wordmark:hover .star {
  transform: rotate(90deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  font-size: 14px;
  letter-spacing: -0.14px;
}

.nav-links a {
  color: var(--text-muted);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a.active {
  color: var(--text);
}

.nav-links .ext::after {
  content: "↗";
  font-size: 11px;
  margin-left: 4px;
  color: var(--text-faint);
}

/* GitHub stars pill — count filled in by site.js (progressive enhancement) */
.gh-star {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border: 1px solid var(--hairline);
  border-radius: 7px;
  background: var(--surface-1);
  color: var(--text-muted);
  transition: color 150ms var(--ease), border-color 150ms var(--ease),
    background 150ms var(--ease);
}

.gh-star:hover {
  color: var(--text);
  border-color: var(--hairline-strong);
  background: var(--surface-2);
}

.gh-star .gh-ico {
  color: var(--accent);
  font-size: 12px;
  line-height: 1;
}

.gh-star .gh-count {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0;
}

/* ---------------------------------------------------------- hero */

.hero {
  position: relative;
  padding: 104px 0 72px;
  overflow: hidden;
}

/* faint starfield — Arcturus is a star, after all */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(
      1px 1px at 12% 24%,
      rgba(237, 233, 224, 0.32) 50%,
      transparent 50%
    ), radial-gradient(1px 1px at 31% 68%, rgba(237, 233, 224, 0.18) 50%, transparent 50%),
    radial-gradient(1.5px 1.5px at 47% 15%, rgba(237, 233, 224, 0.25) 50%, transparent 50%),
    radial-gradient(1px 1px at 63% 51%, rgba(237, 233, 224, 0.2) 50%, transparent 50%),
    radial-gradient(1px 1px at 78% 28%, rgba(237, 233, 224, 0.3) 50%, transparent 50%),
    radial-gradient(1.5px 1.5px at 88% 72%, rgba(237, 233, 224, 0.16) 50%, transparent 50%),
    radial-gradient(1px 1px at 22% 88%, rgba(237, 233, 224, 0.14) 50%, transparent 50%),
    radial-gradient(1px 1px at 94% 10%, rgba(237, 233, 224, 0.22) 50%, transparent 50%),
    radial-gradient(2px 2px at 70% 86%, rgba(217, 130, 59, 0.35) 50%, transparent 50%),
    radial-gradient(1px 1px at 8% 55%, rgba(237, 233, 224, 0.2) 50%, transparent 50%);
}

/* Arky, the mascot — a baby bear hugging the star it's named after */
.hero .mascot {
  display: block;
  width: 132px;
  height: auto;
  margin: 0 0 18px -10px; /* optical left-align: the svg has sparkle padding */
}

.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow .sep {
  color: var(--text-faint);
  margin: 0 8px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(42px, 6.4vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.5px;
  margin: 22px 0 20px;
  max-width: 16ch;
}

/* Instrument Serif has no Hangul — give the Korean hero a proper serif */
.hero h1:lang(ko) {
  font-family: "Noto Serif KR", var(--font-serif);
  font-style: normal;
  font-weight: 600;
  font-size: clamp(38px, 5.6vw, 58px);
  letter-spacing: -1.5px;
  line-height: 1.22;
  word-break: keep-all;
}

.hero .sub {
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 56ch;
}

.hero .sub strong {
  color: var(--text);
  font-weight: 500;
}

.cta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 18px;
  border-radius: 8px;
  font-family: var(--font-text);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.14px;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    background 150ms var(--ease),
    color 150ms var(--ease),
    border-color 150ms var(--ease);
}

.btn-primary {
  background: var(--cream);
  color: var(--on-cream);
}

.btn-primary:hover {
  background: #fff;
  color: var(--on-cream);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--hairline-strong);
}

.btn-ghost:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

/* ---------------------------------------------------------- terminal */

.terminal {
  margin: 64px 0 0;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--hairline);
}

.terminal-bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--surface-3);
  border: 1px solid var(--hairline);
}

.terminal-bar .title {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
}

.terminal-body {
  padding: 22px 24px 26px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  overflow-x: auto;
}

.terminal-body .prompt {
  color: var(--accent);
  user-select: none;
}
.terminal-body .cmd {
  color: var(--cream);
}
.terminal-body .out {
  color: var(--text-muted);
}
.terminal-body .mark {
  color: var(--accent);
}
.terminal-body .live {
  color: var(--status-running);
}
.terminal-body .blank {
  line-height: 1.1;
}

/* ---------------------------------------------------------- sections */

.section {
  padding: 88px 0 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 40px;
}

.section-head .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

.section-head h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.72px;
  line-height: 1.3;
}

.section-head .aside {
  margin-left: auto;
  font-size: 13px;
  color: var(--text-faint);
  letter-spacing: -0.08px;
}

.section-intro {
  color: var(--text-muted);
  margin: -18px 0 36px;
}

/* features */

.features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  overflow: hidden;
}

.feature {
  background: var(--surface-1);
  padding: 26px 26px 28px;
  transition: background 150ms var(--ease);
}

.feature:hover {
  background: var(--surface-2);
}

.feature .f-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.feature h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.34px;
  margin: 10px 0 8px;
}

.feature p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* routing cards */

.routing {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.route-card {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 24px;
}

.route-card .r-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-wash);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
}

.route-card h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.15px;
  margin: 14px 0 8px;
}

.route-card p {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* tables */

.table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--hairline);
  border-radius: 14px;
  overflow: hidden;
  /* border-radius on table needs this */
  border-spacing: 0;
}

.table-clip {
  border: 1px solid var(--hairline);
  border-radius: 14px;
  overflow-x: auto;
  overflow-y: hidden;
}

.table-clip .table {
  border: 0;
}

.table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 12px 18px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--hairline);
}

.table td {
  padding: 13px 18px;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}

.table tr:last-child td {
  border-bottom: 0;
}

.table tr {
  background: var(--surface-1);
  transition: background 150ms var(--ease);
}
.table tbody tr:hover {
  background: var(--surface-2);
}

.table .mono,
td.mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--cream);
  white-space: nowrap;
}

.table .desc {
  font-size: 13.5px;
  color: var(--text-muted);
}

.table .default {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  white-space: nowrap;
}

/* code blocks */

.codeblock {
  position: relative;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  margin: 18px 0;
}

.codeblock pre {
  padding: 18px 20px;
  font-size: 13px;
  line-height: 1.75;
  overflow-x: auto;
  color: var(--cream);
}

.codeblock .comment {
  color: var(--text-faint);
}
.codeblock .accent {
  color: var(--accent);
}
.codeblock .muted {
  color: var(--text-muted);
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  height: 26px;
  padding: 0 10px;
  border-radius: 6px;
  border: 1px solid var(--hairline);
  background: var(--surface-2);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  cursor: pointer;
  opacity: 0;
  transition:
    opacity 150ms var(--ease),
    color 150ms var(--ease),
    border-color 150ms var(--ease);
}

.codeblock:hover .copy-btn {
  opacity: 1;
}

.copy-btn:hover {
  color: var(--text);
  border-color: var(--hairline-strong);
}

.copy-btn.copied {
  color: var(--status-running);
  opacity: 1;
}

/* architecture tree */

.arch {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 26px 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2.1;
  overflow-x: auto;
}

.arch .path {
  color: var(--cream);
}
.arch .note {
  color: var(--text-muted);
}
.arch .star {
  color: var(--accent);
}

.arch-foot {
  margin-top: 20px;
  font-size: 13.5px;
  color: var(--text-muted);
}

/* quick start split */

.quickstart {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: start;
}

/* let grid tracks shrink below the min-content of code blocks (whose
   long unbroken command lines would otherwise blow the track past the
   viewport); the inner pre scrolls via its own overflow-x: auto */
.quickstart > * {
  min-width: 0;
}

.quickstart .lead {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.65;
}

.quickstart .lead p + p {
  margin-top: 12px;
}

.req-list {
  list-style: none;
  margin-top: 18px;
}

.req-list li {
  display: flex;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 14px;
  color: var(--text);
}

.req-list li::before {
  content: "✦";
  color: var(--accent);
  font-size: 12px;
  line-height: 1.7;
}

.req-list li:last-child {
  border-bottom: 0;
}

.req-list .opt {
  color: var(--text-faint);
  font-size: 12.5px;
}

/* ---------------------------------------------------------- footer */

.footer {
  margin-top: 110px;
  border-top: 1px solid var(--hairline);
  padding: 36px 0 48px;
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-faint);
}

.footer-inner .star {
  color: var(--accent);
}

.footer-links {
  margin-left: auto;
  display: flex;
  gap: 18px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 13px;
}
.footer-links a:hover {
  color: var(--text);
}

/* ---------------------------------------------------------- guide page */

.guide-hero {
  padding: 72px 0 0;
}

.guide-hero h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -1.2px;
  line-height: 1.15;
  margin: 18px 0 14px;
}

.guide-hero h1:lang(ko) {
  word-break: keep-all;
}

.guide-hero .sub {
  color: var(--text-muted);
  font-size: 15.5px;
  max-width: 58ch;
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 30px 0 0;
}

.toc a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  padding: 0 13px;
  border-radius: 999px;
  border: 1px solid var(--hairline);
  font-size: 13px;
  color: var(--text-muted);
  transition:
    color 150ms var(--ease),
    border-color 150ms var(--ease),
    background 150ms var(--ease);
}

.toc a:hover {
  color: var(--text);
  border-color: var(--hairline-strong);
  background: var(--surface-1);
}

.toc a .n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
}

.guide-section {
  padding: 72px 0 0;
}

.guide-section .section-head {
  margin-bottom: 28px;
}

.guide-section p {
  color: var(--text-muted);
  margin: 0 0 14px;
}

.guide-section p strong {
  color: var(--text);
  font-weight: 600;
}

.guide-section h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.34px;
  color: var(--text);
  margin: 34px 0 12px;
}

.guide-section ul,
.guide-section ol {
  margin: 0 0 16px;
  padding-left: 4px;
  list-style: none;
}

.guide-section ul li,
.guide-section ol li {
  position: relative;
  padding: 5px 0 5px 22px;
  color: var(--text-muted);
}

.guide-section ul li::before {
  content: "✦";
  position: absolute;
  left: 0;
  top: 6px;
  color: var(--accent);
  font-size: 11px;
}

.guide-section ol {
  counter-reset: item;
}

.guide-section ol li {
  padding-left: 30px;
}

.guide-section ol li::before {
  counter-increment: item;
  content: counter(item, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.callout {
  position: relative;
  background: var(--accent-wash);
  border: 1px solid rgba(217, 130, 59, 0.25);
  border-radius: 12px;
  padding: 14px 16px 14px 40px;
  margin: 18px 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text);
}

.callout::before {
  content: "✦";
  position: absolute;
  left: 17px;
  top: 15px;
  color: var(--accent);
  font-size: 12px;
}

.callout.warn {
  background: rgba(229, 86, 74, 0.08);
  border-color: rgba(229, 86, 74, 0.25);
}

.callout.warn::before {
  content: "!";
  color: var(--status-failed);
  font-family: var(--font-mono);
}

.callout p {
  margin: 0;
}

.callout p + p {
  margin-top: 8px;
}

/* inline code inside callouts gets the same pill as prose code, but is
   allowed to wrap (long flag/command fragments shouldn't overflow) */
.callout code {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 5px;
  padding: 1px 5px;
  color: var(--cream);
}

/* a full command on its own line — easier to read and copy than inline */
.callout .cmd {
  display: block;
  margin-top: 8px;
  padding: 6px 10px;
  border-radius: 6px;
  overflow-x: auto;
  white-space: pre;
}

/* ---------------------------------------------------------- reveal */

/* hidden state only applies when JS confirmed itself via html.js —
   without JS everything stays visible */
html.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 600ms var(--ease),
    transform 600ms var(--ease);
  transition-delay: var(--d, 0ms);
}

html.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------------------------------------------------------- responsive */

@media (max-width: 840px) {
  .hero {
    padding: 72px 0 48px;
  }
  .hero h1 {
    max-width: none;
  }
  .features {
    grid-template-columns: 1fr;
  }
  .routing {
    grid-template-columns: 1fr;
  }
  .quickstart {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .section {
    padding: 64px 0 0;
  }
  .section-head {
    flex-wrap: wrap;
    gap: 10px 16px;
  }
  .section-head .aside {
    margin-left: 0;
    width: 100%;
  }
  .nav-links {
    gap: 16px;
  }
  .nav-links .hide-sm {
    display: none;
  }
  .guide-hero h1 {
    font-size: 32px;
  }
}