:root {
  --bg: #07090a;
  --bg-2: #0d1112;
  --line: #1c2426;
  --ink: #e6ebe8;
  --muted: #8a9691;
  --green: #3dff8a;
  --green-dim: #1f8a4c;
  --amber: #ffc857;
  --gutter: clamp(16px, 5vw, 64px);
  --max: 1120px;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

html.i18n-pending body { visibility: hidden; }
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, .mono { font-family: var(--mono); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* ───────────── nav ───────────── */

nav {
  position: absolute;
  z-index: 2;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 20px var(--gutter);
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .08em;
}
nav a { color: var(--muted); }
nav a:hover { color: var(--ink); text-decoration: none; }
nav .links { display: flex; gap: 22px; }

/* ───────────── hero ───────────── */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
}

#rain {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: .55;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at center, rgba(7,9,10,.55) 0%, rgba(7,9,10,.9) 60%, var(--bg) 100%);
  pointer-events: none;
}

.hero__inner { text-align: center; padding: 0 var(--gutter); }

.hero h1 {
  font-family: var(--mono);
  font-weight: 600;
  font-size: clamp(4rem, 18vw, 12rem);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--green);
  text-shadow: 0 0 40px rgba(61,255,138,.35);
}
.hero h1 .cursor {
  display: inline-block;
  width: .5em;
  height: .8em;
  margin-left: .06em;
  background: var(--green);
  vertical-align: -.04em;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero .lead {
  margin: 22px auto 0;
  max-width: 34ch;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 300;
  color: var(--ink);
}
.hero .sub {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: .85rem;
  color: var(--muted);
}

.hero__scroll {
  position: absolute;
  bottom: max(28px, env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ───────────── sections ───────────── */

section { padding: clamp(72px, 12vw, 140px) 0; border-top: 1px solid var(--line); }

.eyebrow {
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 18px;
}

h2 {
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -.02em;
  max-width: 22ch;
}

.intro {
  margin-top: 22px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.08rem;
}
.intro strong { color: var(--ink); font-weight: 500; }

/* why */

.why {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.why div { background: var(--bg); padding: 28px; }
.why h3 { font-size: 1.05rem; font-weight: 500; margin-bottom: 8px; }
.why p { color: var(--muted); font-size: .96rem; }

/* the cast */

.cast {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (max-width: 680px) { .cast { grid-template-columns: 1fr; } }
.card {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 28px 26px 26px;
  transition: border-color .2s, transform .2s;
}
.card:hover { border-color: var(--green-dim); transform: translateY(-2px); }
.card .where {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}
.card h3 {
  margin: 10px 0 4px;
  font-family: var(--mono);
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--green);
}
.card .role { font-size: 1rem; color: var(--ink); margin-bottom: 14px; }
.card ul { list-style: none; color: var(--muted); font-size: .93rem; }
.card li { padding-left: 16px; position: relative; margin-top: 6px; }
.card li::before { content: "›"; position: absolute; left: 0; color: var(--green-dim); }
.card .quote {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-style: italic;
  font-size: .85rem;
  color: #5f6b66;
}

/* diagram */

.diagram {
  margin-top: 56px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: clamp(16px, 3vw, 32px);
}
.diagram { overflow-x: auto; }
.diagram svg { width: 100%; min-width: 680px; height: auto; display: block; }
.diagram svg text { font-family: var(--mono); }

.flow {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px 36px;
  counter-reset: step;
}
.flow div { counter-increment: step; }
.flow div::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--green);
  margin-bottom: 6px;
}
.flow h3 { font-size: 1.02rem; font-weight: 500; margin-bottom: 6px; }
.flow p { color: var(--muted); font-size: .94rem; }

/* terminal */

.terminal {
  margin-top: 56px;
  background: #050606;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(61,255,138,.15);
}
.terminal__bar {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
.terminal__bar i { width: 11px; height: 11px; border-radius: 50%; background: #2a3234; }
.terminal__bar span { margin-left: 10px; font-family: var(--mono); font-size: .75rem; color: var(--muted); }
.terminal pre {
  padding: 22px clamp(16px, 3vw, 28px);
  font-size: clamp(.72rem, 1.6vw, .86rem);
  line-height: 1.75;
  overflow-x: auto;
  color: #c9d2ce;
}
.terminal .p { color: var(--green); }
.terminal .c { color: #56625d; }
.terminal .ok { color: var(--green); }
.terminal .a { color: var(--amber); }

/* details */

.details {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px 56px;
}
.details h3 {
  font-size: 1.08rem;
  font-weight: 500;
  margin-bottom: 8px;
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.details h3 code { font-size: .78rem; color: var(--green); font-weight: 400; }
.details p { color: var(--muted); font-size: .96rem; }
.details p code { color: var(--ink); font-size: .88em; }

.stack {
  margin-top: 56px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.stack span {
  font-family: var(--mono);
  font-size: .8rem;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
}

/* closing */

.closing { text-align: center; }
.closing h2 { margin: 0 auto; }
.closing .intro { margin-left: auto; margin-right: auto; }

footer {
  border-top: 1px solid var(--line);
  padding: 32px var(--gutter);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--muted);
}
footer a { color: var(--muted); }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero h1 .cursor { animation: none; }
  #rain { display: none; }
}

footer .lang button {
  font: inherit; color: var(--muted); background: none; border: 0; padding: 0; cursor: pointer;
}
footer .lang button:hover { color: var(--ink); }
footer .lang button[aria-current] { color: var(--green); }