/* Landing page — Long Document macrostructure, Hum theme.
   Layout + scroll effects only; colours/type/space come from tokens.css. */

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

[hidden] { display: none !important; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
html, body { overflow-x: clip; }
body {
  font-family: var(--font-ui);
  color: var(--color-ink-0);
  background:
    radial-gradient(1100px 480px at 50% -120px, var(--color-accent-dim), transparent),
    var(--color-paper-2);
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
code {
  padding: 2px 6px;
  background: var(--color-paper-3);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* ---------- shared bits ---------- */
.eyebrow {
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.eyebrow:first-child { color: var(--color-accent); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 44px;
  padding: 0 var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-paper-0);
  color: var(--color-ink-0);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--duration-fast) ease, background var(--duration-fast) ease, box-shadow var(--duration-base) ease;
}
.btn svg { width: 16px; height: 16px; }
.btn:hover { background: var(--color-paper-2); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn:focus-visible { outline: 2px solid var(--color-border-focus); outline-offset: 2px; }
.btn-primary { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-lg { height: 52px; padding: 0 var(--space-6); font-size: 15px; border-radius: var(--radius-lg); }

/* ---------- progress bar ---------- */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  z-index: 300;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), oklch(70% 0.16 60));
  transition: width 60ms linear;
}

/* ---------- nav ---------- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: 1080px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-5);
  transition: box-shadow var(--duration-base) ease, background var(--duration-base) ease;
}
.site-nav.scrolled {
  background: oklch(97% 0.01 75 / 0.85);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.wordmark svg { width: 20px; height: 20px; color: var(--color-accent); }
.nav-links { display: flex; gap: var(--space-5); font-size: 14px; font-weight: 600; color: var(--color-ink-2); }
.nav-links a { position: relative; padding: var(--space-1) 0; }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-out);
}
.nav-links a:hover::after { transform: scaleX(1); }
@media (max-width: 700px) { .nav-links { display: none; } }

/* ---------- hero ---------- */
.hero {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  padding: calc(96px + var(--space-10)) var(--space-5) var(--space-10);
  text-align: center;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 7.5vw, 76px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.035em;
}
.accent-underlined {
  background: linear-gradient(100deg, var(--color-accent) 20%, oklch(62% 0.16 142) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  max-width: 54ch;
  margin: var(--space-5) auto 0;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.65;
  color: var(--color-ink-2);
}
.hero-cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}
.hero-token {
  max-width: 100%;
  margin-top: var(--space-10);
  padding: var(--space-4);
  background: oklch(100% 0 0 / 0.55);
  backdrop-filter: blur(14px);
  border: 1px solid oklch(100% 0 0 / 0.7);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 40px color-mix(in oklab, var(--color-accent) 14%, transparent);
  animation: token-glow 5s ease-in-out infinite;
  font-family: var(--font-mono);
  font-size: clamp(11px, 1.6vw, 13px);
  word-break: break-all;
  line-height: 1.9;
}
@keyframes token-glow {
  0%, 100% { box-shadow: var(--shadow-lg), 0 0 32px color-mix(in oklab, var(--color-accent) 10%, transparent); }
  50%      { box-shadow: var(--shadow-lg), 0 0 56px color-mix(in oklab, var(--color-accent) 22%, transparent); }
}
.seg-header    { color: oklch(55% 0.18 340); }
.seg-payload   { color: var(--color-accent-ink); }
.seg-signature { color: var(--color-success); }
.seg-dot       { color: var(--color-ink-3); font-weight: 700; }

/* hero decorations — sit BEHIND the text (z-index:-1), pinned to the edges */
.hero-decor { position: absolute; inset: 0; pointer-events: none; z-index: -1; }
.chip {
  position: absolute;
  padding: var(--space-2) var(--space-4);
  background: oklch(100% 0 0 / 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  box-shadow: 0 10px 24px color-mix(in oklab, currentColor 22%, transparent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  animation: bob 6s ease-in-out infinite;
}
.chip-a { top: 15%; left: 2%;  rotate: -4deg; color: oklch(55% 0.18 340); }
.chip-b { top: 21%; right: 2%; rotate: 3deg;  color: var(--color-accent-ink); animation-delay: 1.2s; }
.chip-c { top: 64%; left: 3%;  rotate: 3deg;  color: var(--color-success); animation-delay: 2.1s; }
.chip-d { top: 70%; right: 3%; rotate: -3deg; color: var(--color-ink-2); animation-delay: 3s; }
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
}
.blob-1 {
  width: 280px; height: 280px; top: 4%; left: -80px;
  background: var(--color-accent-dim);
  animation: blob-drift 18s ease-in-out infinite alternate;
}
.blob-2 {
  width: 240px; height: 240px; top: 42%; right: -70px;
  background: oklch(90% 0.07 140);
  animation: blob-drift 22s ease-in-out infinite alternate-reverse;
}
@keyframes bob {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%      { transform: translateY(-14px) rotate(1.5deg); }
}
@keyframes blob-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(60px, -40px) scale(1.15); }
}

/* ---------- ticker ---------- */
.ticker {
  position: relative;
  overflow: clip;
  border-block: 1px solid var(--color-border);
  background: var(--color-paper-0);
  padding: var(--space-3) 0;
}
.ticker::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 30%, oklch(100% 0 0 / 0.65) 50%, transparent 70%);
  transform: translateX(-100%);
  animation: ticker-shimmer 7s ease-in-out infinite;
}
@keyframes ticker-shimmer {
  0%, 55% { transform: translateX(-100%); }
  85%, 100% { transform: translateX(100%); }
}
.ticker-track {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  width: max-content;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-ink-3);
  animation: ticker-scroll 28s linear infinite;
}
.ticker-track i { font-style: normal; color: var(--color-accent); }
@keyframes ticker-scroll {
  to { transform: translateX(-50%); }
}

/* ---------- tool sections ---------- */
.tool-section {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: var(--space-10);
  max-width: 1040px;
  margin: 0 auto;
  padding: var(--space-10) var(--space-5);
}
.tool-section.flip .tool-copy { order: 2; }
.tool-section.flip .tool-visual { order: 1; }

.tool-copy h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.tool-copy > p:not(.eyebrow) {
  margin-top: var(--space-4);
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--color-ink-2);
}
.feature-list {
  margin-top: var(--space-5);
  list-style: none;
}
.feature-list li {
  position: relative;
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--color-ink-1);
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  translate: 0 -50%;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--color-accent-dim) center / 8px no-repeat
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23b4770f' stroke-width='4'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
}
.tool-link { margin-top: var(--space-6); }

.mini-card {
  padding: var(--space-5);
  background: var(--color-paper-0);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) ease;
}
.tool-visual:hover .mini-card {
  transform: translateY(-6px) rotate(-1deg);
  box-shadow: var(--shadow-lg), 0 16px 40px color-mix(in oklab, var(--color-accent) 18%, transparent);
}

.claim-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--color-border);
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.claim-row:last-child { border-bottom: none; }
.claim-key { min-width: 92px; font-weight: 700; color: var(--color-accent-ink); }
.claim-val { flex: 1; word-break: break-all; color: var(--color-ink-1); }
.badge {
  padding: 3px var(--space-3);
  border-radius: var(--radius-full);
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.badge-success { background: var(--color-success-dim); color: var(--color-success); }
.badge-info    { background: var(--color-accent-dim); color: var(--color-accent-ink); }

.hash-demo-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--color-border);
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.hash-demo-row:last-of-type { border-bottom: none; }
.hash-algo { min-width: 74px; font-weight: 700; color: var(--color-accent-ink); }
.hex { color: var(--color-ink-2); word-break: break-all; }
.compare-demo { margin-top: var(--space-3); padding-top: var(--space-3); border-top: 1px solid var(--color-border); }

.kv-row {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--color-border);
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.kv-row:last-of-type { border-bottom: none; }
.kv-key { min-width: 96px; font-weight: 700; color: var(--color-accent-ink); }
.kv-val { color: var(--color-ink-1); }
.storage-tabs-demo {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-3);
}
.storage-tabs-demo .tab-on { color: var(--color-accent-ink); font-weight: 700; box-shadow: 0 2px 0 var(--color-accent); }

.diff-mini { font-family: var(--font-mono); font-size: 13px; line-height: 2.1; }
.diff-line { display: block; padding: 0 var(--space-2); border-left: 3px solid transparent; }
.diff-line.added    { background: var(--color-success-dim); border-color: var(--color-success); color: oklch(42% 0.13 142); }
.diff-line.removed  { background: var(--color-danger-dim);  border-color: var(--color-danger);  color: oklch(45% 0.18 25); }
.diff-line.modified { background: var(--color-warning-dim); border-color: var(--color-warning); color: var(--color-accent-ink); }

/* ---------- principles ---------- */
.principles { max-width: 1040px; margin: 0 auto; padding: var(--space-10) var(--space-5); text-align: center; }
.principles h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.03em;
}
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-8);
  text-align: left;
}
.principle {
  padding: var(--space-6);
  background: var(--color-paper-0);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-ink-2);
}
.principle strong {
  display: block;
  margin-bottom: var(--space-2);
  font-size: 16px;
  color: var(--color-ink-0);
}

/* ---------- final CTA — full-bleed dark finale ---------- */
.cta-final {
  position: relative;
  overflow: clip;
  background: var(--color-ink-0);
  color: #fff;
}

.cta-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 1040px;
  margin: 0 auto;
  padding: clamp(40px, 5vw, 64px) var(--space-5);
  text-align: center;
}

.cta-glyph {
  position: absolute;
  top: 50%; left: 50%;
  translate: -50% -56%;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(150px, 28vw, 280px);
  line-height: 1;
  color: oklch(100% 0 0 / 0.045);
  pointer-events: none;
  user-select: none;
}

.cta-final .eyebrow { color: var(--color-accent); }

.cta-final h2 {
  margin-top: 0;
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.cta-final > .cta-inner > p:not(.eyebrow) {
  margin: var(--space-3) 0 var(--space-6);
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.65;
  color: oklch(85% 0.01 75);
}

.site-footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5) var(--space-10);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-ink-3);
}
.site-footer strong { color: var(--color-ink-2); }

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px) scale(0.985);
  transition: opacity 650ms var(--ease-out), transform 650ms var(--ease-out);
  transition-delay: var(--d, 0ms);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .tool-section { grid-template-columns: 1fr; gap: var(--space-6); padding-block: var(--space-8); }
  .tool-section.flip .tool-copy { order: 1; }
  .tool-section.flip .tool-visual { order: 2; }
  .principle-grid { grid-template-columns: 1fr; }
  .hero { padding-top: calc(80px + var(--space-8)); }
  /* no side margins to float in — chips would only crowd the text */
  .chip { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}