/* Hallmark · macrostructure: Marquee Hero (body → Stat-Led) · tone: technical-editorial, nocturnal · anchor hue: lime 123
 * nav: N10 scroll-morph · hero: H1 Marquee (centred, xxl, letter reveal, canvas glyph sphere) · footer: Ft3 index (3 cols)
 * theme: studied-DNA (source: https://usehandle.ai/en via zeeker/design-systems/usehandle-ai-v2)
 *   paper-dark oklch(23.1% 0.020 268) · paper-light #fff · accent oklch(95.5% 0.121 123) · Sentient 300 + Inter + IBM Plex Mono
 * enrichment: E Tier-B hand-built canvas (glyph sphere of protocol names) · studied: yes · DNA-source: url
 */
@import url("tokens.css");

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { overflow-x: clip; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 6rem; }
body { font-family: var(--font-body); font-size: var(--text-body); line-height: 1.6; color: var(--color-foreground); background: var(--color-background); -webkit-font-smoothing: antialiased; text-wrap: pretty; }
a { color: inherit; }
img, svg, canvas { display: block; }
:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: var(--radius-md); }
.skip { position: absolute; left: var(--space-sm); top: -4rem; z-index: 100; background: var(--color-lime); color: var(--color-ink); padding: var(--space-xs) var(--space-sm); border-radius: var(--radius-full); }
.skip:focus-visible { top: var(--space-sm); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap { width: 100%; max-width: 72rem; margin-inline: auto; padding-inline: var(--space-sm); }
@media (min-width: 768px) { .wrap { padding-inline: 2rem; } }

.label { font-family: var(--font-mono); font-size: var(--text-label); line-height: 1.3; letter-spacing: .08em; text-transform: uppercase; font-feature-settings: "zero" 1; }
.d-l, .d-m, .hero-title { font-family: var(--font-display); font-weight: 300; font-style: normal; text-wrap: balance; overflow-wrap: anywhere; min-width: 0; }
.d-l { font-size: var(--text-display-l); line-height: 1.05; letter-spacing: -.025em; }
.d-m { font-size: var(--text-display-m); line-height: 1.12; letter-spacing: -.02em; }
.heading { font-size: var(--text-heading); font-weight: 500; line-height: 1.25; letter-spacing: -.015em; }
.small { font-size: var(--text-small); line-height: 1.55; }
.muted { color: var(--color-muted); }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); min-height: 3rem; padding: .75rem 1.5rem; border-radius: var(--radius-full); border: 1px solid transparent;
  font: 500 var(--text-small)/1.2 var(--font-body); text-decoration: none; white-space: nowrap; cursor: pointer;
  transition: opacity var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out); }
.btn-primary { background: var(--color-lime); color: var(--color-ink); box-shadow: var(--shadow-glow-lime); }
.btn-primary:hover { opacity: .8; }
.btn-ghost { background: transparent; color: var(--color-on-ink); border-color: var(--color-ink-line); }
.btn-ghost:hover { border-color: var(--color-ink-line-strong); }
.btn:focus-visible { box-shadow: var(--focus-ring); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .4; cursor: not-allowed; box-shadow: none; }
.btn[data-state="loading"] { cursor: progress; }
.btn-sm { min-height: 2.5rem; padding: .5rem 1.125rem; }

/* ---------- nav (N10 scroll-morph) ---------- */
.nav { position: fixed; inset-inline: .75rem; top: .75rem; z-index: 50; }
@media (min-width: 768px) { .nav { inset-inline: 1rem; top: 1rem; } }
.nav-in { margin-inline: auto; max-width: 100vw; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; height: 3.5rem; padding-inline: .5rem .375rem;
  border: 1px solid transparent; border-radius: var(--radius-nav); color: var(--color-on-ink);
  transition: max-width var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out); }
@media (min-width: 768px) { .nav-in { height: 4rem; } }
.nav.is-pill .nav-in { max-width: 68rem; background-color: rgba(25, 29, 39, .84); border-color: var(--color-ink-line); box-shadow: var(--shadow-float-md);
  backdrop-filter: blur(16px) saturate(1.5); -webkit-backdrop-filter: blur(16px) saturate(1.5); }
.brand { display: inline-flex; align-items: baseline; gap: 1px; font-weight: 600; letter-spacing: -.02em; font-size: 1.0625rem; text-decoration: none; padding: .5rem; white-space: nowrap; }
.brand span { color: var(--color-on-ink-muted); font-weight: 400; }
.nav-links { display: none; gap: 2rem; list-style: none; }
.nav-links a { font-size: var(--text-small); text-decoration: none; color: var(--color-on-ink-muted); white-space: nowrap; transition: color var(--dur-fast) var(--ease-out); }
.nav-links a:hover { color: var(--color-on-ink); }
@media (min-width: 900px) { .nav-links { display: flex; } }
.nav-end { grid-column: 3; justify-self: end; }

/* ---------- hero ---------- */
.hero { position: relative; min-height: 100svh; background: var(--color-ink); color: var(--color-on-ink); display: grid; place-items: center; overflow: hidden; isolation: isolate; }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(ellipse 48% 42% at 50% 55%, rgba(25, 29, 39, .82), rgba(25, 29, 39, .4) 60%, transparent 80%); }
.hero-inner { width: 100%; max-width: 72rem; text-align: center; padding: 7.5rem var(--space-sm) 6rem; display: grid; justify-items: center; gap: var(--space-lg); }
.announce { display: inline-flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: .25rem .625rem; padding: .375rem .375rem .375rem 1rem;
  border: 1px solid var(--color-ink-line); border-radius: var(--radius-full); font-size: .8125rem; color: var(--color-on-ink-muted); background: rgba(25, 29, 39, .55); max-width: 100%; }
.announce b { color: var(--color-on-ink); font-weight: 500; }
.announce .pip { width: .375rem; height: .375rem; border-radius: 50%; background: var(--color-lime); box-shadow: 0 0 8px rgba(196, 240, 90, .95), 0 0 24px rgba(160, 225, 60, .6); }
.announce a { color: var(--color-on-ink); text-decoration: none; padding: .25rem .625rem; border-radius: var(--radius-full); white-space: nowrap; transition: background-color var(--dur-fast) var(--ease-out); }
.announce a:hover { background: rgba(255, 255, 255, .06); }
.hero-title { font-size: var(--text-hero); line-height: .98; letter-spacing: -.03em; max-width: 14ch; }
.hero-title .w { display: inline-block; white-space: nowrap; }
.hero-title .l { display: inline-block; animation: rise 2.2s var(--ease-hero) both; animation-delay: calc(320ms + var(--i) * 24ms); }
@keyframes rise { from { opacity: 0; transform: translateY(22%); } to { opacity: 1; transform: none; } }
.hero-lede { max-width: 40rem; color: var(--color-on-ink-muted); font-size: clamp(1rem, .95rem + .25vw, 1.125rem); }
.hero-foot { display: grid; justify-items: center; gap: var(--space-sm); }
.hero-foot .label { color: var(--color-on-ink-muted); }
.hero-foot a { color: var(--color-on-ink); text-underline-offset: 3px; text-decoration-color: var(--color-ink-line-strong); }
.hero-foot a:hover { text-decoration-color: var(--color-lime); }

/* ---------- subscribe form (8 states) ---------- */
.subscribe { width: 100%; max-width: 30rem; }
.subscribe-row { display: flex; gap: .375rem; padding: .375rem; border-radius: var(--radius-full); border: 1px solid var(--color-ink-line); background: rgba(18, 21, 29, .7);
  transition: border-color var(--dur-fast) var(--ease-out); }
.subscribe-row:hover { border-color: var(--color-ink-line-strong); }
.subscribe-row:focus-within { border-color: var(--color-lime); }
.subscribe input { flex: 1; min-width: 0; background: transparent; border: 0; color: var(--color-on-ink); font: 400 var(--text-body)/1.2 var(--font-body); padding-inline: 1rem; }
.subscribe input::placeholder { color: var(--color-on-ink-muted); }
.subscribe input:focus-visible { outline: none; box-shadow: none; }
.subscribe .btn { min-height: 2.75rem; }
.subscribe-msg { min-height: 1.5rem; margin-top: var(--space-xs); font-size: .8125rem; color: var(--color-on-ink-muted); }
.subscribe[data-state="error"] .subscribe-row { border-color: var(--color-err); }
.subscribe[data-state="error"] .subscribe-msg { color: #ff9c96; }
@media (max-width: 420px) {
  .subscribe-row { flex-direction: column; border-radius: var(--radius-card); }
  .subscribe input { min-height: 2.75rem; }
}

.dissolve { height: 10rem; background: linear-gradient(to bottom, var(--color-ink), #1d4f5a 45%, #9fe0d6 75%, var(--color-background)); }

/* ---------- body sections ---------- */
.section { padding-block: var(--space-section); }
.section + .section { padding-top: 0; }
.sec-head { display: grid; gap: var(--space-sm); max-width: 44rem; margin-bottom: var(--space-xl); }
.sec-head.center { margin-inline: auto; text-align: center; justify-items: center; }

/* names marquee */
.names { padding-block: var(--space-xl) 0; }
.names + .section { padding-top: var(--space-section); }
.names .label { text-align: center; color: var(--color-muted); margin-bottom: var(--space-md); }
.marquee { overflow: hidden; mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; width: max-content; gap: var(--space-xl); animation: marquee 40s linear infinite; }
.marquee-track span { font-family: var(--font-display); font-weight: 300; font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); color: var(--color-muted); white-space: nowrap; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* pillar guide */
.pillar { display: grid; grid-template-columns: minmax(0, 1fr); border: 1px solid var(--color-border); border-radius: var(--radius-dropdown); overflow: hidden; background: var(--color-background); box-shadow: var(--shadow-float-lg); }
@media (min-width: 900px) { .pillar { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); } }
.pillar-main { padding: var(--space-lg); display: grid; gap: var(--space-md); align-content: start; }
.pillar-main .d-m a { text-decoration: none; }
.pillar-main .d-m a:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 6px; text-decoration-color: var(--color-muted); }
.pillar-main .label { color: var(--color-muted); }
.pillar-toc { background: var(--color-paper-2); padding: var(--space-lg); border-top: 1px solid var(--color-border); }
@media (min-width: 900px) { .pillar-toc { border-top: 0; border-left: 1px solid var(--color-border); } }
.pillar-toc ol { list-style: none; counter-reset: toc; display: grid; }
.pillar-toc li { counter-increment: toc; display: grid; grid-template-columns: 2.25rem minmax(0, 1fr); align-items: baseline; padding-block: .75rem; border-bottom: 1px solid var(--color-border); }
.pillar-toc li:last-child { border-bottom: 0; }
.pillar-toc li::before { content: counter(toc, decimal-leading-zero); font-family: var(--font-mono); font-size: var(--text-label); color: var(--color-muted); }
.btn-dark { background: var(--color-ink); color: var(--color-on-ink); box-shadow: var(--shadow-float-sm); width: fit-content; }
.btn-dark:hover { opacity: .85; }

/* protocol race */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); gap: var(--space-md); margin-bottom: var(--space-lg); }
.stat { border-top: 1px solid var(--color-foreground); padding-top: var(--space-sm); display: grid; gap: .25rem; }
.stat-num { font-family: var(--font-display); font-weight: 300; font-size: var(--text-display-l); line-height: 1; letter-spacing: -.025em; font-variant-numeric: tabular-nums; }
.stat .label { color: var(--color-muted); }
.table-wrap { border: 1px solid var(--color-border); border-radius: var(--radius-card); overflow-x: auto; background: var(--color-background); }
table { width: 100%; border-collapse: collapse; min-width: 44rem; }
th, td { text-align: left; padding: .875rem 1.125rem; border-bottom: 1px solid var(--color-border); vertical-align: top; font-size: var(--text-small); }
th { font-family: var(--font-mono); font-weight: 400; font-size: var(--text-label); letter-spacing: .08em; text-transform: uppercase; color: var(--color-muted); background: var(--color-surface); }
tr:last-child td { border-bottom: 0; }
td:first-child { font-weight: 600; white-space: nowrap; }
.chip { display: inline-flex; align-items: center; gap: .375rem; padding: .1875rem .625rem; border-radius: var(--radius-full); font-size: .8125rem; font-weight: 500; white-space: nowrap; }
.chip.ok { background: var(--color-ok-wash); color: var(--color-ok); }
.chip.warn { background: var(--color-warn-wash); color: var(--color-warn); }
.chip.info { background: var(--color-info-wash); color: var(--color-info); }
.chip.idle { background: var(--color-paper-2); color: var(--color-muted); }
.table-note { margin-top: var(--space-sm); }
.table-note a { color: var(--color-foreground); text-underline-offset: 3px; }

/* on the desk */
.desk { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); border-top: 1px solid var(--color-border); }
.desk li { display: grid; gap: .75rem; align-content: start; padding: var(--space-md) var(--space-md) var(--space-lg) 0; border-bottom: 1px solid var(--color-border); }
@media (min-width: 640px) { .desk li { padding-right: var(--space-lg); } }
.desk .label { color: var(--color-muted); }
.desk .chip { justify-self: start; }

/* closing band */
.closing { background: var(--color-ink); color: var(--color-on-ink); position: relative; overflow: hidden; isolation: isolate; }
.closing::before { content: ""; position: absolute; inset: auto 0 0; height: 70%; z-index: -1; background: radial-gradient(ellipse 50% 60% at 50% 100%, rgba(46, 211, 214, .18), transparent 70%); }
.closing .wrap { padding-block: var(--space-section); display: grid; justify-items: center; text-align: center; gap: var(--space-md); }
.closing .light-line { width: min(100%, 28rem); height: 1px; background: linear-gradient(to right, transparent, var(--color-cyan-line), transparent); }
.closing p { max-width: 40rem; color: var(--color-on-ink-muted); }

/* footer (Ft3, 3 cols) */
.foot { background: var(--color-ink-2); color: var(--color-on-ink-muted); padding-block: var(--space-xl) var(--space-lg); }
.foot-brand { padding: 0; color: var(--color-on-ink); }
.foot-tag { margin-top: var(--space-xs); max-width: 20rem; }
.foot-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-lg); }
@media (min-width: 768px) { .foot-grid { grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr)); } }
.foot h2 { font-family: var(--font-mono); font-size: var(--text-label); font-weight: 400; letter-spacing: .08em; text-transform: uppercase; color: var(--color-on-ink); margin-bottom: var(--space-sm); }
.foot ul { list-style: none; display: grid; gap: .5rem; }
.foot a { font-size: var(--text-small); text-decoration: none; white-space: nowrap; transition: color var(--dur-fast) var(--ease-out); }
.foot a:hover { color: var(--color-on-ink); }
.foot-base { margin-top: var(--space-xl); padding-top: var(--space-md); border-top: 1px solid var(--color-ink-line); display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-md); justify-content: space-between; font-size: .8125rem; }

/* reveal */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 150ms !important; }
  .hero-title .l { animation: none; }
  .marquee-track { animation: none; flex-wrap: wrap; justify-content: center; width: auto; row-gap: var(--space-sm); }
  .marquee-track [aria-hidden="true"] { display: none; }
  .marquee { mask-image: none; -webkit-mask-image: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}