/* ---------- design tokens ---------- */
:root {
  --bg-0: #06080c;
  --bg-1: #0a0e14;
  --bg-2: #0f141d;
  --line: rgba(180, 210, 230, 0.08);
  --line-strong: rgba(180, 210, 230, 0.18);
  --text: #e8edf2;
  --text-dim: #8a96a6;
  --text-mute: #54606f;

  --cyan: #00e5c7;
  --cyan-soft: rgba(0, 229, 199, 0.55);
  --blue: #3b82f6;
  --amber: #ffb547;
  --rose: #ff6b8a;

  --clinical: #00e5c7;
  --ops: #7aa2ff;
  --infra: #ffb547;
  --flow: #ffffff;

  --radius: 14px;
  --radius-sm: 8px;

  --maxw: 1240px;
  --pad-x: clamp(20px, 4vw, 56px);

  --fs-eyebrow: 12px;
  --fs-body: 16.5px;
  --fs-lede: clamp(16px, 1.6vw, 19px);
  --fs-h1: clamp(44px, 8vw, 104px);
  --fs-cap-title: 22px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }
input { font: inherit; }
a { color: inherit; }

body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--text);
  background: var(--bg-1);
  min-height: 100dvh;
  overflow-x: hidden;
  position: relative;
}

/* Cheap, paint-once ambient gradient — fixed so it doesn't repaint on scroll. */
body::before {
  content: "";
  position: fixed; inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 700px at 80% 0%, rgba(0, 229, 199, 0.08), transparent 60%),
    radial-gradient(800px 600px at 0% 100%, rgba(59, 130, 246, 0.08), transparent 55%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: 12px; top: -40px;
  background: var(--cyan); color: #001a16;
  padding: 8px 12px; border-radius: 6px;
  font-weight: 600; z-index: 100;
  transition: top 0.2s var(--ease);
}
.skip:focus { top: 12px; }

/* ---------- canvas (sits behind hero only) ---------- */
#twin-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  /* Height is set inline by JS to match the hero region. */
  z-index: 1;
  pointer-events: none;
  opacity: 0.65;
}

/* All real content sits above bg layers */
.site-header, .hero, .site-footer { position: relative; z-index: 5; }

/* ---------- header ---------- */
.site-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 28px var(--pad-x);
  max-width: var(--maxw);
  margin: 0 auto;
}

.brand {
  display: inline-flex; align-items: center; gap: 12px;
  text-decoration: none;
}
.brand-mark { width: 30px; height: 30px; }
.brand-text { display: inline-flex; align-items: baseline; gap: 6px; }
.brand-name {
  font-weight: 600; letter-spacing: -0.02em; font-size: 19px;
  color: var(--text);
}
.brand-sub {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.18em;
}

.meta {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(10, 14, 20, 0.85);
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 var(--cyan-soft);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(0, 229, 199, 0.55); }
  70%  { box-shadow: 0 0 0 12px rgba(0, 229, 199, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 199, 0); }
}
.status-text {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11.5px; color: var(--text-dim);
  letter-spacing: 0.04em;
}

.header-end {
  display: inline-flex; align-items: center; gap: 14px;
}

/* ---------- language switcher ---------- */
.lang {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11.5px; letter-spacing: 0.06em;
}
.lang a {
  color: var(--text-mute);
  text-decoration: none;
  padding: 4px 2px;
  transition: color 0.2s var(--ease);
}
.lang a:hover { color: var(--text); }
.lang a[aria-current="page"] {
  color: var(--text);
  font-weight: 500;
}
.lang-sep { color: var(--text-mute); user-select: none; }

/* ---------- soft language hint banner ---------- */
.lang-hint {
  display: flex; align-items: center; flex-wrap: wrap;
  gap: 14px;
  width: calc(100% - var(--pad-x) * 2);
  max-width: calc(var(--maxw) - var(--pad-x) * 2);
  margin: 8px auto 0;
  padding: 11px 16px;
  background: rgba(0, 229, 199, 0.05);
  border: 1px solid rgba(0, 229, 199, 0.22);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-dim);
  position: relative;
  z-index: 5;
  animation: hint-in 0.5s var(--ease) forwards;
}
.lang-hint[hidden] { display: none; }

@keyframes hint-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.lang-hint-msg {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.02em;
}
.lang-hint-link {
  color: var(--cyan);
  text-decoration: none;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}
.lang-hint-link:hover { border-bottom-color: var(--cyan); }
.lang-hint-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}
.lang-hint-dismiss {
  margin-left: auto;
  background: transparent;
  border: 0;
  color: var(--text-dim);
  font-size: 18px;
  line-height: 1;
  padding: 4px 8px;
  cursor: pointer;
  border-radius: 4px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.lang-hint-dismiss:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}
.lang-hint-dismiss:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- hero ---------- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(40px, 8vw, 96px) var(--pad-x) 96px;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  margin: 0 0 28px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: var(--fs-eyebrow);
  color: var(--text-dim);
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.eyebrow-bar {
  width: 28px; height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.headline {
  font-size: var(--fs-h1);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 500;
  margin: 0 0 28px;
  max-width: 16ch;
}
.headline .accent {
  background: linear-gradient(120deg, var(--cyan) 10%, #6cf2dc 50%, var(--blue) 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  font-style: italic;
  font-weight: 400;
}

.lede {
  font-size: var(--fs-lede);
  color: var(--text-dim);
  max-width: 64ch;
  margin: 0 0 40px;
  line-height: 1.6;
}

/* ---------- contact ---------- */
.contact {
  max-width: 560px;
  margin: 0 0 56px;
}
.contact-prompt {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.05em;
  margin: 0 0 12px;
}
.contact-link {
  display: inline-flex; align-items: center; justify-content: space-between;
  gap: 16px; width: 100%;
  background: rgba(10, 14, 20, 0.85);
  border: 1px solid var(--line-strong);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  text-decoration: none;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 15px;
  letter-spacing: 0.005em;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}
.contact-link:hover {
  border-color: var(--cyan);
  background: rgba(0, 229, 199, 0.06);
  transform: translateY(-1px);
}
.contact-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.contact-arrow { width: 16px; height: 16px; flex-shrink: 0; color: var(--cyan); }

/* ---------- footer ---------- */
.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px var(--pad-x) 36px;
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: space-between; align-items: center;
  font-size: 13px;
  color: var(--text-mute);
  border-top: 1px solid var(--line);
}
.foot-l { display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.dot-sep { color: var(--text-mute); }
.site-footer a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.site-footer a:hover { color: var(--cyan); border-color: var(--cyan-soft); }

/* ---------- entrance ---------- */
.headline, .lede, .contact {
  opacity: 0;
  transform: translateY(8px);
  animation: rise 0.9s var(--ease) forwards;
}
.headline { animation-delay: 0.15s; }
.lede     { animation-delay: 0.30s; }
.contact  { animation-delay: 0.45s; }

@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- responsive ---------- */
@media (max-width: 520px) {
  .site-header { padding-top: 18px; padding-bottom: 14px; }
  .meta .status-text { display: none; }
  .meta { padding: 6px 10px; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  #twin-canvas { display: none; }
}