/* ============================================================================
   autonomous-kickoff — main stylesheet (shared by index.html + reference.html)
   ========================================================================== */

/* ---- Reset / base ------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-text);
  font-size: var(--text-base);
  line-height: var(--lh-body);
  letter-spacing: 0.005em;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
  overflow-x: hidden;
}

/* Console ambience: a faint ember aurora + cool grid, fixed behind content */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60rem 40rem at 78% -8%, oklch(0.77 0.15 64 / 0.10), transparent 60%),
    radial-gradient(50rem 40rem at -10% 8%, oklch(0.55 0.07 256 / 0.18), transparent 55%),
    linear-gradient(180deg, oklch(0.17 0.012 256), var(--bg) 38%);
}

img, svg { display: block; max-width: 100%; }
svg { height: auto; }

a { color: var(--signal-link); text-decoration: none; }
a:hover { color: var(--signal-hi); }
:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 3px;
}

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

/* ---- Typography --------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: var(--lh-tight);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); font-weight: 700; }
h4 { font-size: var(--text-lg); font-weight: 700; line-height: var(--lh-snug); }
p { text-wrap: pretty; }
strong { color: var(--ink); font-weight: 600; }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.92em; }

.eyebrow {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--muted);
}
.text-muted { color: var(--muted); }
.mono { font-family: var(--font-mono); }
.lead {
  font-size: var(--text-lg);
  color: var(--ink-2);
  max-width: 46ch;
  text-wrap: pretty;
}

/* ---- Layout primitives -------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: clamp(2.5rem, 2rem + 3vh, 4.5rem); }
.section + .section { border-top: 1px solid color-mix(in oklch, var(--hairline) 60%, transparent); }
.prose { max-width: var(--prose); }
.stack > * + * { margin-top: var(--flow, var(--sp-4)); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--sp-3); align-items: center; }
.grid-auto {
  display: grid;
  gap: var(--sp-5);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
}

.section-head { max-width: 54rem; margin-bottom: clamp(2rem, 1.4rem + 2vw, 3.25rem); }
.section-head h2 { margin-top: var(--sp-3); }
.section-head .lead { margin-top: var(--sp-4); max-width: 60ch; }

/* ---- Buttons ------------------------------------------------------------ */
.btn {
  --_bg: transparent;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.005em;
  line-height: 1;
  padding: 0.85em 1.3em;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  background: var(--_bg);
  color: var(--ink);
  cursor: pointer;
  transition: transform var(--dur-1) var(--ease-out),
              background-color var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out),
              box-shadow var(--dur-2) var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn-primary {
  background: var(--signal);
  color: var(--on-signal);
  box-shadow: 0 0 0 1px oklch(0.84 0.14 70 / 0.4), 0 10px 30px -12px var(--signal-glow);
}
.btn-primary:hover { background: var(--signal-hi); color: var(--on-signal); box-shadow: var(--glow); }
.btn-ghost { border-color: var(--hairline-2); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink-2); background: var(--surface); color: var(--ink); }
.btn svg { width: 1.05em; height: 1.05em; }
.btn-sm { padding: 0.6em 0.95em; font-size: var(--text-xs); }

/* ---- Header / nav ------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: var(--z-sticky);
  transition: background-color var(--dur-2) var(--ease-out), border-color var(--dur-2) var(--ease-out), backdrop-filter var(--dur-2);
  border-bottom: 1px solid transparent;
}
.site-header[data-scrolled="true"] {
  background: oklch(0.15 0.01 256 / 0.72);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: color-mix(in oklch, var(--hairline) 70%, transparent);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); height: 4.25rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-family: var(--font-display); font-weight: 800; color: var(--ink); letter-spacing: -0.01em; font-size: 1.02rem; }
.brand:hover { color: var(--ink); }
.brand-dot { width: 0.62rem; height: 0.62rem; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 0 var(--signal-glow); animation: pulse 2.4s var(--ease-out) infinite; flex: none; }
.brand-mark { color: var(--muted); font-weight: 500; }
.nav-links { display: flex; align-items: center; gap: clamp(0.6rem, 0.2rem + 1vw, 1.6rem); }
.nav-links a { color: var(--ink-2); font-size: var(--text-sm); font-weight: 500; }
.nav-links a:hover { color: var(--ink); }
.nav-right { display: flex; align-items: center; gap: var(--sp-3); }
.nav-toggle { display: none; }
.icon-link { display: inline-flex; color: var(--ink-2); padding: 0.4rem; border-radius: var(--r-sm); }
.icon-link:hover { color: var(--ink); background: var(--surface); }
.icon-link svg { width: 1.3rem; height: 1.3rem; }

/* ---- Hero --------------------------------------------------------------- */
.hero { padding-block: clamp(3.5rem, 2rem + 7vw, 7rem) clamp(3rem, 2rem + 4vw, 6rem); position: relative; }
.hero-grid { display: grid; gap: clamp(2.5rem, 1rem + 6vw, 5rem); grid-template-columns: 1fr; align-items: center; }
@media (min-width: 60rem) { .hero-grid { grid-template-columns: 1.05fr 0.95fr; } }
.hero h1 { font-size: var(--display); letter-spacing: var(--tracking-display); margin-top: var(--sp-4); }
.hero h1 .accent { color: var(--signal); }
.hero .lead { margin-top: var(--sp-5); font-size: clamp(1.1rem, 1rem + 0.6vw, 1.4rem); max-width: 40ch; }
.hero-cta { margin-top: var(--sp-6); }
.hero-meta { margin-top: var(--sp-6); display: flex; flex-wrap: wrap; gap: var(--sp-2) var(--sp-5); color: var(--muted); font-size: var(--text-sm); }
.hero-meta b { color: var(--ink-2); font-weight: 600; }

/* ---- Loop diagram (hero signature visual) ------------------------------- */
.loop-figure { position: relative; }
.loop-figure svg { width: 100%; overflow: visible; }
.loop-figure figcaption { margin-top: var(--sp-4); text-align: center; color: var(--muted); font-size: var(--text-xs); font-family: var(--font-mono); letter-spacing: 0.06em; }
.loop-orbit { fill: none; stroke: var(--hairline-2); stroke-width: 1.5; stroke-dasharray: 2 7; opacity: 0.7; }
.loop-comet { fill: none; stroke: var(--signal-hi); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 6 94; filter: drop-shadow(0 0 8px var(--signal-glow)); animation: comet 7s linear infinite; }
.node-box { fill: var(--surface); stroke: var(--hairline-2); stroke-width: 1.2; }
.node-box.is-gate { stroke: var(--signal); }
.node-label { font-family: var(--font-display); font-weight: 700; fill: var(--ink); font-size: 13px; letter-spacing: -0.01em; }
.node-sub { font-family: var(--font-mono); fill: var(--muted); font-size: 9.5px; letter-spacing: 0.04em; }
.node-ico { stroke: var(--signal); fill: none; stroke-width: 1.6; }
.core-ring { fill: none; stroke: var(--hairline); stroke-width: 1.2; }
.core-pulse { fill: none; stroke: var(--signal); stroke-width: 2; transform-origin: center; transform-box: fill-box; animation: ring 2.8s var(--ease-out) infinite; }
.core-dot { fill: var(--signal); }
.core-text { font-family: var(--font-mono); fill: var(--ink-2); font-size: 10px; letter-spacing: 0.1em; text-anchor: middle; }

@keyframes pulse { 0% { box-shadow: 0 0 0 0 var(--signal-glow); } 70% { box-shadow: 0 0 0 7px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
@keyframes comet { to { stroke-dashoffset: -100; } }
@keyframes ring { 0% { opacity: 0.9; transform: scale(0.7); } 70% { opacity: 0; transform: scale(1.25); } 100% { opacity: 0; transform: scale(1.25); } }

/* ---- Generic panel ------------------------------------------------------ */
.panel {
  background: var(--bg-raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: clamp(1.25rem, 1rem + 1vw, 1.9rem);
}
.panel h3 { color: var(--ink); }
.panel p { margin-top: var(--sp-3); color: var(--ink-2); font-size: var(--text-sm); }

.feature-icon { width: 2.4rem; height: 2.4rem; display: grid; place-items: center; border-radius: var(--r); background: var(--signal-dim); color: var(--signal); margin-bottom: var(--sp-4); }
.feature-icon svg { width: 1.3rem; height: 1.3rem; stroke: currentColor; fill: none; stroke-width: 1.7; }

/* ---- The "why": problem -> solution ------------------------------------- */
.why-grid { display: grid; gap: var(--sp-5); grid-template-columns: 1fr; }
@media (min-width: 52rem) { .why-grid { grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 1rem + 3vw, 3.5rem); } }
.why-col h3 { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-4); }
.why-tag { font-family: var(--font-mono); font-size: var(--text-xs); padding: 0.2em 0.6em; border-radius: var(--r-pill); letter-spacing: 0.06em; }
.why-tag--old { background: var(--surface); color: var(--muted); border: 1px solid var(--hairline); }
.why-tag--new { background: var(--signal-dim); color: var(--signal); border: 1px solid color-mix(in oklch, var(--signal) 40%, transparent); }
.why-list { list-style: none; padding: 0; display: grid; gap: var(--sp-3); }
.why-list li { position: relative; padding-left: calc(1.15rem + var(--sp-3)); font-size: var(--text-sm); color: var(--ink-2); }
.why-list li::before { content: ""; position: absolute; left: 0; top: 0.18rem; width: 1.15rem; height: 1.15rem; border-radius: 50%; background: var(--mark, var(--surface-hi)); }
.why-col--new .why-list li::before { background: radial-gradient(circle at 50% 38%, var(--signal) 38%, transparent 42%), var(--signal-dim); }

/* ---- Phase pipeline ----------------------------------------------------- */
.pipeline { display: grid; gap: var(--sp-3); counter-reset: phase -1; }
@media (min-width: 56rem) { .pipeline { grid-template-columns: repeat(6, 1fr); gap: var(--sp-2); } }
.phase {
  position: relative;
  background: var(--bg-raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r);
  padding: var(--sp-4);
  display: flex; flex-direction: column; gap: var(--sp-2);
}
.phase-num { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--signal); letter-spacing: 0.08em; }
.phase h4 { font-size: var(--text-base); }
.phase p { font-size: var(--text-xs); color: var(--muted); }
.phase-gate { margin-top: auto; font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-2); padding-top: var(--sp-3); border-top: 1px dashed var(--hairline-2); }
.phase-gate b { color: var(--signal); font-weight: 500; }
@media (min-width: 56rem) { .phase:not(:last-child)::after { content: ""; position: absolute; right: calc(-1 * var(--sp-2) - 1px); top: 50%; width: var(--sp-2); height: 1px; background: var(--hairline-2); z-index: 1; } }

/* ---- Sentinel verdicts -------------------------------------------------- */
.verdicts { display: grid; gap: var(--sp-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); }
.verdict { border-radius: var(--r-lg); padding: var(--sp-5); border: 1px solid; background: var(--bg-raised); }
.verdict-badge { display: inline-flex; align-items: center; gap: var(--sp-2); font-family: var(--font-mono); font-weight: 500; font-size: var(--text-sm); letter-spacing: 0.04em; }
.verdict-badge::before { content: ""; width: 0.7rem; height: 0.7rem; border-radius: 50%; }
.verdict p { margin-top: var(--sp-3); font-size: var(--text-sm); color: var(--ink-2); }
.verdict--ok { border-color: color-mix(in oklch, var(--ok) 35%, transparent); background: linear-gradient(var(--ok-dim), transparent); }
.verdict--ok .verdict-badge { color: var(--ok); } .verdict--ok .verdict-badge::before { background: var(--ok); }
.verdict--cond { border-color: color-mix(in oklch, var(--warn) 35%, transparent); background: linear-gradient(var(--warn-dim), transparent); }
.verdict--cond .verdict-badge { color: var(--warn); } .verdict--cond .verdict-badge::before { background: var(--warn); }
.verdict--rej { border-color: color-mix(in oklch, var(--danger) 38%, transparent); background: linear-gradient(var(--danger-dim), transparent); }
.verdict--rej .verdict-badge { color: var(--danger); } .verdict--rej .verdict-badge::before { background: var(--danger); }

/* ---- Tiers (continuous operation + authorization) ----------------------- */
.tier-cards { display: grid; gap: var(--sp-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); }
.tier-card { background: var(--bg-raised); border: 1px solid var(--hairline); border-radius: var(--r-lg); padding: var(--sp-5); position: relative; overflow: hidden; }
.tier-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent, var(--hairline-2)); }
.tier-card[data-tier="0"] { --accent: var(--muted); }
.tier-card[data-tier="1"] { --accent: var(--signal); }
.tier-card[data-tier="2"] { --accent: var(--ok); }
.tier-kicker { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--accent, var(--muted)); letter-spacing: 0.08em; }
.tier-card h3 { margin-top: var(--sp-2); font-size: var(--text-lg); }
.tier-card p { margin-top: var(--sp-3); font-size: var(--text-sm); color: var(--ink-2); }

/* ---- Trust / guardrails list ------------------------------------------- */
.guards { display: grid; gap: var(--sp-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); }
.guard { display: flex; gap: var(--sp-4); align-items: flex-start; padding: var(--sp-4); border-radius: var(--r); background: color-mix(in oklch, var(--bg-raised) 60%, transparent); }
.guard svg { flex: none; width: 1.4rem; height: 1.4rem; stroke: var(--signal); fill: none; stroke-width: 1.6; margin-top: 0.1rem; }
.guard h4 { font-size: var(--text-base); margin-bottom: var(--sp-1); }
.guard p { font-size: var(--text-sm); color: var(--muted); }

/* ---- Surfaces strip (product-agnostic) ---------------------------------- */
.surfaces { display: flex; flex-wrap: wrap; gap: var(--sp-3); }
.surface-chip { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--ink-2); padding: 0.55em 1em; border-radius: var(--r-pill); border: 1px solid var(--hairline-2); background: var(--bg-raised); }
.surface-chip b { color: var(--signal); font-weight: 500; }

/* ---- CTA band ----------------------------------------------------------- */
.cta-band { text-align: center; }
.cta-band .panel { background: linear-gradient(160deg, oklch(0.22 0.03 64 / 0.5), var(--bg-raised)); border-color: color-mix(in oklch, var(--signal) 30%, var(--hairline)); padding: clamp(2.5rem, 2rem + 4vw, 4.5rem); }
.cta-band h2 { font-size: var(--text-3xl); }
.cta-band .lead { margin: var(--sp-4) auto 0; max-width: 40ch; }
.cta-band .cluster { justify-content: center; margin-top: var(--sp-6); }

/* ---- Code / prompt blocks (shared) -------------------------------------- */
pre { margin: 0; }
.codeblock {
  background: oklch(0.12 0.01 256);
  border: 1px solid var(--hairline);
  border-radius: var(--r);
  padding: var(--sp-4);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--ink-2);
  -webkit-overflow-scrolling: touch;
}
.codeblock .c { color: var(--muted); }
.codeblock .s { color: var(--signal-hi); }

/* ---- Footer ------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--hairline); padding-block: var(--sp-8) var(--sp-7); margin-top: var(--sp-6); }
.footer-grid { display: grid; gap: var(--sp-6); grid-template-columns: 1fr; }
@media (min-width: 48rem) { .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; } }
.footer-col h5 { font-family: var(--font-display); font-size: var(--text-sm); color: var(--ink); margin-bottom: var(--sp-3); letter-spacing: 0; }
.footer-col ul { list-style: none; padding: 0; display: grid; gap: var(--sp-2); }
.footer-col a { color: var(--muted); font-size: var(--text-sm); }
.footer-col a:hover { color: var(--ink); }
.footer-blurb { color: var(--muted); font-size: var(--text-sm); max-width: 34ch; margin-top: var(--sp-3); }
.footer-bottom { margin-top: var(--sp-7); padding-top: var(--sp-5); border-top: 1px solid color-mix(in oklch, var(--hairline) 60%, transparent); display: flex; flex-wrap: wrap; gap: var(--sp-3); justify-content: space-between; align-items: center; color: var(--muted); font-size: var(--text-xs); }
.version-badge { display: inline-flex; align-items: center; gap: var(--sp-2); font-family: var(--font-mono); padding: 0.3em 0.7em; border-radius: var(--r-pill); border: 1px solid var(--hairline-2); color: var(--ink-2); }
.version-badge .dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--ok); }

/* ---- Reveal-on-scroll (PURE enhancement — content is visible by default) -
   Elements only start hidden when <html> has .js-anim (added by an inline head
   script ONLY when JS runs, motion is allowed, and IntersectionObserver exists).
   No-JS, reduced-motion, social crawlers, and headless renderers see everything. */
.reveal { transition: opacity var(--dur-4) var(--ease-expo), transform var(--dur-4) var(--ease-expo); }
.reveal-stagger > * { transition: opacity var(--dur-3) var(--ease-expo), transform var(--dur-3) var(--ease-expo); transition-delay: calc(var(--i, 0) * 70ms); }
.js-anim .reveal { opacity: 0; transform: translateY(14px); }
.js-anim .reveal-stagger > * { opacity: 0; transform: translateY(14px); }
.js-anim .reveal.is-in { opacity: 1; transform: none; }
.js-anim .reveal-stagger.is-in > * { opacity: 1; transform: none; }

/* ---- Utilities ---------------------------------------------------------- */
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: var(--sp-4); top: -3rem; z-index: var(--z-toast); background: var(--signal); color: var(--on-signal); padding: 0.6em 1em; border-radius: var(--r-sm); font-weight: 700; transition: top var(--dur-2) var(--ease-out); }
.skip-link:focus { top: var(--sp-3); color: var(--on-signal); }

/* ---- Mobile nav --------------------------------------------------------- */
@media (max-width: 52rem) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; width: 2.6rem; height: 2.6rem; border-radius: var(--r-sm); border: 1px solid var(--hairline-2); background: var(--bg-raised); color: var(--ink); cursor: pointer; }
  .nav-toggle svg { width: 1.3rem; height: 1.3rem; }
  .nav-links {
    position: fixed; inset: 4.25rem 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: oklch(0.15 0.01 256 / 0.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--hairline);
    padding: var(--sp-4) var(--gutter) var(--sp-5);
    transform: translateY(-120%);
    visibility: hidden;
    transition: transform var(--dur-3) var(--ease-expo), visibility 0s linear var(--dur-3);
    z-index: var(--z-dropdown);
  }
  .nav-links a { padding: var(--sp-4) 0; border-bottom: 1px solid color-mix(in oklch, var(--hairline) 60%, transparent); font-size: var(--text-lg); }
  .site-header[data-nav-open="true"] .nav-links { transform: translateY(0); visibility: visible; transition: transform var(--dur-3) var(--ease-expo), visibility 0s; }
  .nav-desktop-cta { display: none; }
}

/* ---- Reduced motion ----------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; }
  .loop-comet, .core-pulse, .brand-dot { animation: none !important; }
  .loop-comet { stroke-dasharray: 0; opacity: 0.9; }
}