@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/fonts/inter-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --fg: #0a0a0a;
  --text: #52525b;
  --muted: #a1a1aa;
  --line: rgba(10, 10, 10, .08);
  --line-strong: rgba(10, 10, 10, .14);
  --accent: #00a63e;
  --accent-glow: rgba(0, 166, 62, .14);
  --header: rgba(250, 250, 250, .72);
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09090b;
    --surface: #111113;
    --fg: #fafafa;
    --text: #a1a1aa;
    --muted: #63636b;
    --line: rgba(255, 255, 255, .07);
    --line-strong: rgba(255, 255, 255, .13);
    --accent: #22c55e;
    --accent-glow: rgba(34, 197, 94, .16);
    --header: rgba(9, 9, 11, .7);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.7 "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
::selection { background: var(--accent); color: #fff; }
a { color: var(--fg); text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 4px; transition: text-decoration-color .2s; }
a:hover { text-decoration-color: var(--fg); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
strong { color: var(--fg); font-weight: 500; }
code { font-family: var(--mono); font-size: .86em; color: var(--fg); background: var(--line); padding: .15em .4em; border-radius: 5px; overflow-wrap: anywhere; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 560px) { .wrap { padding: 0 20px; } }

/* Backdrop: soft glow + fading grid */
.backdrop { position: absolute; inset: 0 0 auto; height: 720px; pointer-events: none; z-index: -1; overflow: hidden; }
.backdrop::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center top;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%);
}
.backdrop::after {
  content: ""; position: absolute; left: 50%; top: -280px; width: 900px; height: 560px; transform: translateX(-50%);
  background: radial-gradient(closest-side, var(--accent-glow), transparent);
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--header);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 600; font-size: 15px; letter-spacing: -.01em; text-decoration: none; }
.brand-mark { width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center; background: var(--fg); color: var(--bg); }
.brand-mark svg { width: 13px; height: 13px; }

.seg { display: inline-flex; padding: 3px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); }
.seg a { padding: 3px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 500; color: var(--muted); text-decoration: none; transition: color .2s, background .2s; }
.seg a:hover { color: var(--fg); }
.seg a[href="#tr"] { background: var(--fg); color: var(--bg); }

/* One language at a time (CSS-only; both shown where :has is unsupported) */
@supports selector(:has(*)) {
  #en { display: none; }
  body:has(#en:target) #en { display: block; }
  body:has(#en:target) #tr { display: none; }
  body:has(#en:target) .seg a[href="#tr"] { background: none; color: var(--muted); }
  body:has(#en:target) .seg a[href="#en"] { background: var(--fg); color: var(--bg); }
  .only-en { display: none; }
  body:has(#en:target) .only-en { display: block; }
  body:has(#en:target) .only-tr { display: none; }
}
article { scroll-margin-top: 200px; }

/* Hero */
.hero { padding-top: 96px; padding-bottom: 56px; }
@media (max-width: 560px) { .hero { padding-top: 64px; padding-bottom: 40px; } }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 28px;
  padding: 4px 12px 4px 10px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); font-size: 12.5px; font-weight: 500; color: var(--text);
}
.dot { position: relative; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.dot::after { content: ""; position: absolute; inset: -3px; border-radius: 50%; background: var(--accent); opacity: .35; animation: ping 2s cubic-bezier(0, 0, .2, 1) infinite; }
@keyframes ping { 75%, 100% { transform: scale(2.2); opacity: 0; } }

h1 {
  margin: 0; color: var(--fg);
  font-size: clamp(38px, 7vw, 68px); line-height: 1.02; font-weight: 600; letter-spacing: -.045em;
  text-wrap: balance;
}
h1 .soft { color: var(--muted); }
.lead { margin: 24px 0 0; max-width: 580px; font-size: 17px; line-height: 1.65; text-wrap: pretty; }
@media (max-width: 560px) { .lead { font-size: 16px; } }
.updated { margin: 20px 0 0; font-size: 13px; color: var(--muted); }

/* Flow diagram */
.flow {
  margin-top: 56px; padding: 28px; display: flex; align-items: center;
  border: 1px solid var(--line); border-radius: 20px;
  background: linear-gradient(to bottom, var(--surface), color-mix(in srgb, var(--surface) 40%, transparent));
  box-shadow: 0 1px 0 var(--line), 0 24px 48px -32px rgba(0, 0, 0, .25);
}
.node { flex: none; display: grid; gap: 2px; padding: 14px 16px; min-width: 150px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
.node-k { font-family: var(--mono); font-size: 11px; color: var(--muted); }
.node-t { color: var(--fg); font-weight: 500; font-size: 14px; letter-spacing: -.01em; }
.node-t.mono { font-family: var(--mono); font-size: 13px; letter-spacing: 0; }
.node-s { font-size: 12.5px; color: var(--muted); }
.node.hl { border-color: color-mix(in srgb, var(--accent) 45%, transparent); box-shadow: 0 0 0 4px var(--accent-glow), 0 8px 32px -8px var(--accent-glow); }
.node.hl .node-k { color: var(--accent); }
.wire { position: relative; flex: 1; height: 1px; min-width: 24px; background: var(--line-strong); overflow: hidden; }
.wire::after {
  content: ""; position: absolute; top: 0; left: -40%; width: 40%; height: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: travel 2.6s cubic-bezier(.6, 0, .4, 1) infinite;
}
.wire + .node + .wire::after { animation-delay: 1.3s; }
@keyframes travel { to { left: 100%; } }
@media (max-width: 680px) {
  .flow { flex-direction: column; align-items: stretch; padding: 16px; }
  .node { min-width: 0; }
  .wire { flex: none; width: 1px; min-width: 0; height: 28px; margin-left: 32px; }
  .wire::after { left: 0; top: -40%; width: 100%; height: 40%; background: linear-gradient(transparent, var(--accent), transparent); animation-name: travel-v; }
  @keyframes travel-v { to { top: 100%; } }
}

.facts { display: grid; grid-template-columns: repeat(3, 1fr); margin: 20px 0 0; padding: 0; list-style: none; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.facts li { padding: 18px 20px; display: grid; gap: 2px; }
.facts li + li { border-left: 1px solid var(--line); }
.facts b { color: var(--fg); font-weight: 600; font-size: 22px; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.facts span { font-size: 12.5px; color: var(--muted); }
@media (max-width: 560px) { .facts li { padding: 14px; } .facts b { font-size: 18px; } }

/* Content rows */
.rows { padding-bottom: 64px; }
.row { display: grid; grid-template-columns: 220px 1fr; gap: 32px; padding: 40px 0; border-top: 1px solid var(--line); }
@media (max-width: 680px) { .row { grid-template-columns: 1fr; gap: 12px; padding: 32px 0; } }
.row-label { display: flex; gap: 12px; align-items: baseline; }
.row-label .n { font-family: var(--mono); font-size: 12px; color: var(--muted); }
h2 { margin: 0; color: var(--fg); font-size: 15px; font-weight: 500; letter-spacing: -.01em; line-height: 1.5; }
@media (min-width: 681px) { .row-label { position: sticky; top: 92px; align-self: start; } }
.row-body > :first-child { margin-top: 0; }
.row-body > :last-child { margin-bottom: 0; }
.row-body p { margin: 0 0 14px; }
.row-body ul { margin: 0 0 14px; padding: 0; list-style: none; }
.row-body ul li { position: relative; padding-left: 20px; margin-bottom: 10px; }
.row-body ul li::before { content: ""; position: absolute; left: 2px; top: .75em; width: 8px; height: 1px; background: var(--muted); }

ol.timeline { list-style: none; margin: 20px 0; padding: 0; counter-reset: s; }
ol.timeline li { counter-increment: s; position: relative; padding: 0 0 22px 40px; }
ol.timeline li::before {
  content: counter(s); position: absolute; left: 0; top: 1px;
  width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  font: 500 11px/1 var(--mono); color: var(--fg); background: var(--surface); border: 1px solid var(--line-strong);
}
ol.timeline li:not(:last-child)::after { content: ""; position: absolute; left: 12px; top: 29px; bottom: 4px; width: 1px; background: var(--line-strong); }
ol.timeline li:last-child { padding-bottom: 0; }

.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--text); }
.check svg { flex: none; width: 16px; height: 16px; margin-top: 3px; color: var(--accent); }

dl.kv { margin: 0; border-top: 1px solid var(--line); }
dl.kv div { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); }
dl.kv dt { font-size: 13px; color: var(--muted); }
dl.kv dd { margin: 0; color: var(--fg); overflow-wrap: anywhere; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); }
.site-footer .wrap { padding-top: 32px; padding-bottom: 40px; font-size: 13px; color: var(--muted); }
.legal p { margin: 0 0 24px; max-width: 640px; font-size: 12.5px; line-height: 1.7; text-wrap: pretty; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 20px; border-top: 1px solid var(--line); }
.site-footer nav { display: flex; gap: 20px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--fg); }

@media (prefers-reduced-motion: reduce) {
  .dot::after, .wire::after { animation: none; }
}