/* ═══════════════════════════════════════════════════════════════
   Swiss International Typographic Style - tokens, reset, patterns
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg: #FFFFFF;
  --fg: #000000;
  --muted: #F2F2F2;
  --accent: #FF3000;
  --border: #000000;

  --font: 'Inter', -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

  --rail-left: 300px;
  --rail-right: 260px;
  --topbar-h: 64px;

  --border-w: 2px;
  --border-thick: 4px;

  --step: 8px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--topbar-h) + 24px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 900; letter-spacing: -0.02em; }
p { margin: 0 0 1.25em; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0 0 1.25em; padding-left: 1.4em; }
li { margin-bottom: .5em; }
hr { border: 0; border-top: var(--border-w) solid var(--border); margin: 3rem 0; }

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

:focus-visible {
  outline: var(--border-w) solid var(--accent);
  outline-offset: 2px;
}

::selection { background: var(--accent); color: #fff; }

/* ── Patterns / textures ─────────────────────────────────────── */
/* Paper grain. Painted once as a fixed, viewport-sized composited layer:
   tiling an feTurbulence filter across a 40 000px document repaints on every
   scroll frame and makes the page stutter. */
.swiss-noise::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.015'/%3E%3C/svg%3E");
}

.swiss-grid-pattern {
  background-image:
    linear-gradient(to right, rgba(0,0,0,.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,.03) 1px, transparent 1px);
  background-size: 24px 24px;
}

.swiss-dots {
  background-image: radial-gradient(rgba(0,0,0,.04) 1px, transparent 1px);
  background-size: 16px 16px;
}

.swiss-diagonal {
  background-image: repeating-linear-gradient(
    45deg, rgba(0,0,0,.02) 0, rgba(0,0,0,.02) 1px, transparent 1px, transparent 10px
  );
}

/* ── Type utilities ──────────────────────────────────────────── */
.label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.accent { color: var(--accent); }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  height: 56px;
  padding: 0 32px;
  background: var(--fg);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  border: var(--border-w) solid var(--fg);
  transition: background .15s linear, color .15s linear, border-color .15s linear;
}
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── Scroll progress ─────────────────────────────────────────── */
.progress {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  height: 3px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
  background: var(--accent);
  z-index: 60;
}

/* ── Topbar ──────────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
  background: var(--bg);
  border-bottom: var(--border-w) solid var(--border);
}

.topbar__brand { display: flex; align-items: center; gap: 12px; }
.topbar__mark {
  width: 20px; height: 20px;
  background: var(--accent);
  display: block;
}
.topbar__title {
  font-weight: 900;
  font-size: 15px;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.topbar__meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.topbar__sep { color: var(--accent); }

.topbar__burger {
  display: none;
  width: 44px; height: 44px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  border: var(--border-w) solid var(--border);
  padding: 0 10px;
}
.topbar__burger span { display: block; height: 2px; background: var(--fg); }
.topbar__burger[aria-expanded="true"] { background: var(--accent); border-color: var(--accent); }
.topbar__burger[aria-expanded="true"] span { background: #fff; }

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  border-top: var(--border-thick) solid var(--border);
  background: var(--muted);
  padding: 48px 24px;
}
.footer__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: 1600px;
  margin: 0 auto;
}
.footer__label {
  font-size: 11px; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 10px;
}
.footer__text { margin: 0; font-size: 14px; line-height: 1.5; }
.footer__text a { border-bottom: var(--border-w) solid var(--fg); }
.footer__text a:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 768px) {
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Scrim (mobile drawer backdrop) ──────────────────────────── */
.scrim {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  z-index: 45;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}