/* base: tokens, reset, type, buttons, nav, scroll wire, reveal motion, wire divider, footer */
:root {
  --ink: #15181D;
  --ink-2: #1B2027;
  --ink-3: #2C343E;
  --paper: #F7F5F0;
  --paper-2: #ECE8DF;
  --teal: #2BB5C9;
  --teal-deep: #1A7F8E;
  --teal-text: #15707E;
  --teal-soft: rgba(43, 181, 201, 0.16);
  --on-ink: #F7F5F0;
  --muted-ink: #A7B2BB;
  --on-paper: #15181D;
  --muted-paper: #4A545E;
  --amber: #F0B04A;
  --line-ink: rgba(247, 245, 240, 0.14);
  --line-paper: rgba(21, 24, 29, 0.16);
  --sk: rgba(127, 140, 150, 0.22);
  --f-display: 'Sora', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --f-body: 'Figtree', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --gutter: 1rem;
  --sp: 0;
  color-scheme: dark;
}
@media (min-width: 640px) { :root { --gutter: 1.5rem; } }
* { box-sizing: border-box; }
html { scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0; background: var(--ink); color: var(--on-ink);
  font-family: var(--f-body); font-size: 1.0625rem; line-height: 1.6;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: inherit; }
:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; border-radius: 4px; }
.wrap { width: min(1180px, 100% - 2 * var(--gutter)); margin-inline: auto; }
h1, h2, h3, h4 { font-family: var(--f-display); font-weight: 600; margin: 0; text-wrap: balance; }
h2 { font-size: clamp(1.9rem, 1.2rem + 3vw, 3.2rem); line-height: 1.08; letter-spacing: -0.02em; }
p { margin: 0; }
.fine { font-size: 0.875rem; color: var(--muted-ink); }
.on-paper .fine, .paper .fine { color: var(--muted-paper); }
.band { padding-block: clamp(4rem, 9vw, 8rem); }
.paper { background: var(--paper); color: var(--on-paper); }
.ink2 { background: var(--ink-2); }

/* page-to-page fade */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vt-out .25s ease both; }
::view-transition-new(root) { animation: vt-in .4s ease both; }
@keyframes vt-out { to { opacity: 0; } }
@keyframes vt-in { from { opacity: 0; } }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 1.5rem; border-radius: 999px;
  font: 600 1rem var(--f-body); text-decoration: none; cursor: pointer;
  border: 1.5px solid transparent;
  transition: transform .25s ease, box-shadow .25s ease, background .2s ease, border-color .2s ease;
  will-change: transform;
}
.btn-primary { background: var(--teal); color: var(--ink); }
.btn-primary:hover { box-shadow: 0 10px 34px -6px rgba(43, 181, 201, .65); }
.btn-ghost { border-color: var(--line-ink); color: var(--on-ink); background: transparent; }
.btn-ghost:hover { border-color: var(--teal); background: var(--teal-soft); }
.paper .btn-ghost { border-color: var(--line-paper); color: var(--on-paper); }
.paper .btn-ghost:hover { border-color: var(--teal-deep); background: var(--teal-soft); }
.btn-sm { min-height: 40px; padding: 0 1.1rem; font-size: .95rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: .85rem; }
.link { font-weight: 600; text-decoration: none; border-bottom: 2px solid var(--teal); padding-bottom: 2px; transition: border-color .2s, color .2s; }
.link:hover { color: var(--teal); }
.paper .link:hover { color: var(--teal-text); }

/* logo */
.logo { display: block; height: 36px; width: auto; aspect-ratio: 461 / 120; --lw-line: var(--paper); --lw-word: var(--paper); }

/* nav with scroll wire */
.nav {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 30;
  background: rgba(21, 24, 29, 0.8);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-ink);
}
.nav::after { content: ""; position: absolute; left: 0; bottom: -2px; height: 3px; width: calc(var(--sp) * 100%); background: var(--teal); box-shadow: 0 0 14px rgba(43, 181, 201, .9); }
.nav::before { content: ""; position: absolute; left: calc(var(--sp) * (100% - 9px)); bottom: -5px; width: 9px; height: 9px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px rgba(43, 181, 201, .25), 0 0 16px rgba(43, 181, 201, 1); z-index: 1; }
.nav-in { display: flex; align-items: center; gap: 1rem; min-height: 68px; }
.nav .brand { margin-right: auto; }
.nav nav { display: none; gap: .4rem; }
.nav nav a { position: relative; text-decoration: none; color: var(--muted-ink); font-weight: 500; padding: .5rem .8rem; transition: color .2s; }
.nav nav a::after { content: ""; position: absolute; left: .8rem; right: .8rem; bottom: .2rem; height: 2px; background: var(--teal); transform: scaleX(0); transform-origin: left; transition: transform .35s cubic-bezier(.2, .7, .2, 1); }
.nav nav a:hover { color: var(--on-ink); }
.nav nav a:hover::after, .nav nav a[aria-current="page"]::after { transform: scaleX(1); }
.nav nav a[aria-current="page"] { color: var(--on-ink); }
.menu-btn { display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px; padding: 0 11px; background: transparent; border: 1.5px solid var(--line-ink); border-radius: 12px; cursor: pointer; }
.menu-btn i { display: block; height: 2px; background: var(--on-ink); border-radius: 2px; transition: transform .3s ease, opacity .2s ease; }
.nav.open .menu-btn i:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.open .menu-btn i:nth-child(2) { opacity: 0; }
.nav.open .menu-btn i:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav.open nav { display: grid; position: absolute; left: 0; right: 0; top: 100%; background: var(--ink); border-bottom: 1px solid var(--line-ink); padding: .5rem var(--gutter) 1rem; }
.nav.open nav a { padding: .9rem .2rem; font-size: 1.15rem; border-bottom: 1px solid var(--line-ink); }
.nav.open nav a::after { display: none; }
@media (min-width: 900px) { .nav nav { display: flex; } .menu-btn { display: none; } }
@media (max-width: 899px) { .nav .btn-sm { display: none; } .nav-in .menu-btn { margin-left: auto; } .nav .brand { margin-right: 0; } }

/* reveal motion */
.js [data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .8s ease, transform .9s cubic-bezier(.2, .7, .2, 1); transition-delay: var(--d, 0s); }
.js [data-reveal="clip"] { opacity: 0; transform: translateY(30px); filter: blur(10px); letter-spacing: .02em; transition: opacity .9s ease, transform 1s cubic-bezier(.2, .7, .2, 1), filter .9s ease; transition-delay: var(--d, 0s); }
.js [data-reveal="left"] { transform: translateX(-36px); }
.js [data-reveal="right"] { transform: translateX(36px); }
.js [data-reveal="zoom"] { transform: scale(.94); }
.js [data-reveal].in { opacity: 1; transform: none; }
.js [data-reveal="clip"].in { filter: none; letter-spacing: -0.02em; }

/* spotlight hover */
.spot { position: relative; isolation: isolate; }
.spot::before { content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit; opacity: 0; transition: opacity .3s ease; background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%), rgba(43, 181, 201, .22), transparent 60%); pointer-events: none; }
.spot:hover::before { opacity: 1; }

/* wire divider: a node rides the wire as you scroll */
.wire-div { --p: 0; position: relative; height: 56px; margin-block: 0; }
.wire-div::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 2px; margin-top: -1px; background: var(--line-ink); }
.wire-div::after { content: ""; position: absolute; left: 0; top: 50%; height: 2px; margin-top: -1px; width: calc(var(--p) * 100%); background: var(--teal); box-shadow: 0 0 14px rgba(43, 181, 201, .8); }
.wire-div i { position: absolute; top: 50%; left: calc(var(--p) * 100%); width: 16px; height: 16px; margin: -8px 0 0 -8px; border-radius: 50%; background: var(--teal); z-index: 1; box-shadow: 0 0 0 0 rgba(43, 181, 201, .6); animation: node-ping 2s ease-out infinite; }
@keyframes node-ping { 0% { box-shadow: 0 0 0 0 rgba(43, 181, 201, .6); } 100% { box-shadow: 0 0 0 22px rgba(43, 181, 201, 0); } }

/* closing call-to-action band */
.cta-band { position: relative; overflow: hidden; background: var(--ink); padding-block: clamp(4rem, 9vw, 7rem); }
.cta-in { display: grid; gap: 2.5rem; align-items: center; }
@media (min-width: 900px) { .cta-in { grid-template-columns: 1.4fr 1fr; } }
.cta-in h2 { max-width: 15ch; }
.cta-in p { margin-top: 1.1rem; max-width: 42ch; color: var(--muted-ink); }
.cta-in .btn-row { margin-top: 1.8rem; }
.mark-big { display: grid; justify-items: center; }
.mark-big svg { width: min(260px, 64%); height: auto; overflow: visible; }
.big-line { fill: none; stroke: var(--paper); stroke-width: 3.5; stroke-linecap: round; }
.big-arc { fill: none; stroke: var(--teal); stroke-linecap: round; }
.big-node { fill: var(--teal); transform-box: fill-box; transform-origin: center; animation: beat 2.4s ease-in-out infinite; }
.rip { fill: none; stroke: var(--teal); stroke-width: 2; stroke-linecap: round; transform-origin: 32px 32px; opacity: 0; animation: rip 3.6s ease-out infinite; }
.rip.r2 { animation-delay: 1.2s; } .rip.r3 { animation-delay: 2.4s; }
@keyframes rip { 0% { transform: scale(1); opacity: .7; } 100% { transform: scale(1.9); opacity: 0; } }
@keyframes beat { 0%, 100% { transform: scale(1); } 20% { transform: scale(1.2); } }

footer { border-top: 1px solid var(--line-ink); padding-block: 2.5rem; background: var(--ink); }
.foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.25rem; color: var(--muted-ink); font-size: .95rem; }
.foot nav { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.foot a { text-decoration: none; }
.foot a:hover { color: var(--on-ink); }

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal], .js [data-reveal="clip"] { opacity: 1; transform: none; filter: none; transition: none; }
  .wire-div i, .rip, .big-node { animation: none; }
  .rip { opacity: .25; }
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}