/* ---------------------------------------------------------------
   Sentient Horizons design standard · "Deep Field"
   deep-field.css version 1.2.0 (2026-10-08): the "with Claude" link blends into the attribution line until hovered
   Canonical copy: sentient-horizons/design/deep-field.css. Sites copy this
   file unchanged and add their own styles below it; see design/README.md.
   Near-black cosmic field, warm-white serif, amber accent; a warm-paper
   light theme ("Day Field") with the accents deepened.
   --------------------------------------------------------------- */
:root {
  --bg: #08070f;
  --bg-soft: #0c0b16;
  --panel: #110f20;
  --text: #f2eee7;
  --text-soft: #d7d2c7;
  --muted: #968fa3;
  --line: rgba(255, 255, 255, 0.10);
  --line-strong: rgba(255, 255, 255, 0.18);
  --accent: #e3a96b;      /* galaxy-core amber */
  --accent-2: #9b7bc0;    /* nebula violet */
  --accent-3: #6fb6c9;    /* cool arm / data */
  --on-accent: #1a1206;
  --accent-hover: #efb87d;
  --glow: rgba(155, 123, 192, 0.45);
  --header-bg: rgba(8, 7, 15, 0.72);
  --hover-bg: rgba(255, 255, 255, 0.06);
  --active-bg: rgba(255, 255, 255, 0.08);
  --chip-bg: rgba(255, 255, 255, 0.03);
  --callout-bg: rgba(155, 123, 192, 0.10);
  --ok: #7fc48a;
  --no: #d98a7a;
  --star: #fff;
  --radius: 11px;
  --maxw: 1080px;
  --serif: Georgia, 'Iowan Old Style', 'Times New Roman', serif;
  --sans: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

/* Light mode — "Day Field": warm paper, near-black ink, deepened accents. */
:root[data-theme='light'] {
  --bg: #faf9f7;
  --bg-soft: #f1efea;
  --panel: #ffffff;
  --text: #1a1916;
  --text-soft: #34322d;
  --muted: #6b665e;
  --line: rgba(23, 21, 18, 0.11);
  --line-strong: rgba(23, 21, 18, 0.18);
  --accent: #4a4566;
  --accent-2: #6d4f96;
  --accent-3: #2f7c90;
  --on-accent: #fbfaf8;
  --accent-hover: #5b5580;
  --link: #5b4a7e;
  --link-hover: #6d4f96;
  --glow: rgba(74, 69, 102, 0.16);
  --header-bg: rgba(250, 249, 247, 0.86);
  --hover-bg: rgba(23, 21, 18, 0.05);
  --active-bg: rgba(23, 21, 18, 0.08);
  --chip-bg: transparent;
  --callout-bg: rgba(74, 69, 102, 0.06);
  --ok: #2f7c4a;
  --no: #a5432f;
  --star: #c9bfa8;
  --radius: 5px;
}

* { box-sizing: border-box; }
/* The hidden attribute must win over component display rules (e.g. .run-out { display: flex }). */
[hidden] { display: none !important; }
html { scroll-behavior: smooth; background: var(--bg); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
}

/* Links in running text look like links by default. Components whose whole
   block is a link (nav, brand, buttons, chain cards, rail, footer, eyebrows,
   node-name headings) opt out with .u-link-reset or their own rule. */
a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent); transition: color 0.15s ease, text-decoration-color 0.15s ease; }
a:hover { text-decoration-color: currentColor; }
:root[data-theme='light'] a { color: var(--link); }
:root[data-theme='light'] a:hover { color: var(--link-hover); }
.u-link-reset, .navlinks a, .brand, .btn, .link, .fcard, .rail li a, .footer-links a, .eyebrow a, .nname, .term, .beside, .dim { text-decoration: none; }
code { font-family: var(--mono); font-size: 0.88em; color: var(--text-soft); background: var(--chip-bg); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 26px; position: relative; z-index: 1; }
.narrow { max-width: 760px; }

/* ---- cosmic backdrop (top band; scrolls away so reading is calm) ---- */
.space-bg {
  position: absolute; top: 0; left: 0; right: 0; height: 760px; z-index: 0;
  overflow: hidden; pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 50%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 50%, transparent 100%);
}
.space-bg .galaxy {
  position: absolute; inset: 0;
  background:
    radial-gradient(46% 58% at 80% 26%, rgba(227, 169, 107, 0.22), transparent 46%),
    radial-gradient(62% 78% at 76% 25%, rgba(155, 123, 192, 0.24), transparent 60%),
    radial-gradient(100% 120% at 72% 22%, rgba(70, 105, 165, 0.16), transparent 78%);
}
.space-bg .core {
  position: absolute; right: 7%; top: 90px; width: 400px; height: 400px; border-radius: 50%;
  filter: blur(34px); opacity: 0.6;
  background: conic-gradient(from 210deg,
    rgba(227, 169, 107, 0.20), rgba(155, 123, 192, 0.12),
    rgba(70, 105, 165, 0.06), rgba(155, 123, 192, 0.12), rgba(227, 169, 107, 0.20));
}
.starfield { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.starfield span { position: absolute; border-radius: 50%; background: var(--star); }
@keyframes twk { 0%, 100% { opacity: 0.14; } 50% { opacity: 0.95; } }
@media (prefers-reduced-motion: reduce) { .starfield span { animation: none !important; } }
:root[data-theme='light'] .space-bg { display: none; }

/* ---- header / nav ---- */
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: var(--header-bg); backdrop-filter: blur(10px); }
.nav { display: flex; align-items: center; justify-content: space-between; padding-block: 16px; gap: 10px; position: relative; }
.nav-toggle { display: none; width: 38px; height: 38px; padding: 0; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 8px; background: transparent; color: var(--text); cursor: pointer; }
.nav-toggle:hover { border-color: var(--accent); background: var(--hover-bg); }
.nav-toggle .ico-close { display: none; }
.site-header.nav-open .nav-toggle .ico-open { display: none; }
.site-header.nav-open .nav-toggle .ico-close { display: block; }
.brand { font-size: 19px; font-weight: 600; letter-spacing: 0.3px; color: var(--text); }
.brand:hover { color: var(--accent); }
.navlinks { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.navlinks a { font-family: var(--sans); font-size: 13px; letter-spacing: 0.03em; color: var(--text-soft); font-weight: 500; padding: 6px 12px; border-radius: 7px; }
.navlinks a:hover { color: var(--text); background: var(--hover-bg); }
.navlinks a.active { color: var(--text); background: var(--active-bg); }
.navlinks a.nav-secondary { color: var(--muted); font-weight: 400; font-size: 12.5px; }
.navlinks a.nav-primary { color: var(--text-soft); font-weight: 500; }
.navlinks a.nav-primary:hover { color: var(--text); }
.navlinks a.nav-cta { color: var(--on-accent); background: var(--accent); font-weight: 600; margin-left: 8px; }
.navlinks a.nav-cta:hover { color: var(--on-accent); background: var(--accent-hover); }
.nav-divider { width: 1px; height: 18px; background: var(--line-strong); margin: 0 8px; align-self: center; }
.theme-toggle { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; margin-left: 8px; padding: 0; border: 1px solid var(--line); border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease; }
.theme-toggle:hover { color: var(--text); border-color: var(--accent); background: var(--hover-bg); }
.theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-sun { display: block; }
:root[data-theme='light'] .theme-toggle .icon-sun { display: none; }
:root[data-theme='light'] .theme-toggle .icon-moon { display: block; }

/* ---- typography ---- */
h1 { font-size: clamp(28px, 4vw, 38px); line-height: 1.15; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 14px; color: var(--text); }
h1.question { font-size: clamp(34px, 5.2vw, 56px); line-height: 1.08; letter-spacing: -0.015em; }
h2 { font-size: 22px; font-weight: 600; margin: 0; color: var(--text); }
h3 { font-size: 18px; font-weight: 600; margin: 0 0 6px; color: var(--text); }
.eyebrow { font-family: var(--sans); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin: 0 0 10px; }
.eyebrow a { color: inherit; }
.lede { font-size: 18px; color: var(--muted); font-style: italic; }
.prose { font-size: 17px; line-height: 1.75; color: var(--text-soft); }
.prose p { margin: 0 0 1.1em; }
.prose em { color: var(--text); font-style: italic; }
.prose h2 { font-size: 26px; font-weight: 600; line-height: 1.25; color: var(--text); margin: 1.9em 0 0.5em; }
.prose h3 { font-size: 20px; font-weight: 600; line-height: 1.3; color: var(--text); margin: 1.7em 0 0.4em; }
.prose ul, .prose ol { margin: 0 0 1.1em 1.2em; padding: 0; }
.prose li { margin: 0.4em 0; }
.prose blockquote { margin: 1.3em 0; padding: 0.3em 0 0.3em 1.1em; border-left: 3px solid var(--accent); font-style: italic; color: var(--text); }
.prose blockquote p { margin: 0; }
.prose strong { color: var(--text); }
.prose hr { border: none; border-top: 1px solid var(--line); margin: 2.2em 0; }
.dim { color: var(--muted); }
a.dim:hover { color: var(--accent); }
.mono { font-family: var(--mono); font-size: 0.85em; color: var(--muted); }

/* ---- layout helpers ---- */
.hero { padding: 64px 0 16px; max-width: 760px; }
.hero.wide { max-width: none; }
.section { padding: 26px 0; }
.hero + .section { padding-top: 0; }
.shead { display: flex; align-items: baseline; gap: 12px; border-bottom: 1px solid var(--line); padding-bottom: 8px; margin-bottom: 20px; }
.shead h2 { font-size: 16px; letter-spacing: 0.02em; }
.shead span { font-family: var(--sans); font-size: 11px; color: var(--muted); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
[id] { scroll-margin-top: 84px; }

/* ---- buttons, chips, callouts ---- */
.btn { font-family: var(--sans); font-size: 13px; padding: 8px 15px; border-radius: 8px; background: var(--accent); color: var(--on-accent); display: inline-block; cursor: pointer; border: 1px solid var(--accent); }
.btn:hover { color: var(--on-accent); filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover { background: var(--accent); color: var(--on-accent); }
.ctas { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 4px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { display: inline-block; font-family: var(--sans); font-size: 11.5px; letter-spacing: 0.02em; border: 1px solid var(--line); border-radius: 20px; padding: 3px 10px; color: var(--muted); background: var(--chip-bg); white-space: nowrap; }
.chip.accent { color: var(--accent); }
.chip.ok { color: var(--ok); border-color: var(--ok); }
.chip.no { color: var(--no); border-color: var(--no); }
.chip.violet { color: var(--accent-2); }
.callout { background: var(--callout-bg); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; padding: 15px 17px; }
.callout h3 { font-size: 13px; font-family: var(--sans); letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); }
.callout p { margin: 6px 0 0; }
.kicker { font-size: 13px; font-family: var(--sans); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 26px 0 10px; }

/* ---- tables (shared shape; a site may widen or narrow columns) ---- */
.prose table, table.data { border-collapse: collapse; width: 100%; font-family: var(--sans); font-size: 13.5px; margin: 12px 0 18px; display: block; overflow-x: auto; }
.prose th, .prose td, table.data th, table.data td { text-align: left; padding: 7px 9px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th, table.data th { color: var(--muted); font-weight: 600; letter-spacing: 0.02em; }
.prose code, table.data code { white-space: nowrap; }

/* ---- footer ---- */
.site-footer { border-top: 1px solid var(--line); margin-top: 56px; padding: 30px 0; color: var(--muted); font-family: var(--sans); font-size: 13px; position: relative; z-index: 1; }
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 2rem; flex-wrap: wrap; }
.footer-brand { font-weight: 600; color: var(--text); }
.footer-tag { margin: 0.3rem 0 0.5rem; }
.footer-links { margin: 0; display: flex; gap: 1rem; flex-wrap: wrap; }
.footer-links a { color: var(--text-soft); }
.footer-links a:hover { color: var(--accent); }
.footer-meta { margin: 0.5rem 0 0; font-size: 12px; }
.footer-meta a.with-claude { color: inherit; text-decoration: none; }
.footer-meta a.with-claude:hover { color: var(--accent); text-decoration: underline; }
.footer-parent { margin: 0.6rem 0 0; font-size: 12px; }
.footer-parent a { color: var(--text-soft); }
.footer-parent a:hover { color: var(--accent); }

/* ---- responsive ---- */
@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .navlinks { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: flex-end; gap: 2px; margin: 0; padding: 8px 26px 16px; background: var(--header-bg); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
  .site-header.nav-open .navlinks { display: flex; }
  .navlinks a { padding: 11px 6px; border-radius: 6px; font-size: 15px; text-align: right; }
  .navlinks a.nav-secondary { font-size: 15px; }
  .navlinks a.nav-cta { margin: 8px 0 0; }
  .nav-divider { display: none; }
  .theme-toggle { margin: 10px 0 0; }
}
@media (max-width: 720px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .space-bg { height: 560px; }
  .container { padding: 0 16px; }
}