/* AR Communications — Swiss minimal, dark mode */

:root {
  /* Type */
  --font-sans: "Switzer", "Inter", -apple-system, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-display: "Switzer", "Inter", -apple-system, sans-serif;

  /* Dark surfaces */
  --bg: #0a0a0a;
  --bg-2: #111111;
  --bg-3: #161616;
  --surface: #1a1a1a;
  --border: rgba(255, 255, 255, 0.08);
  --border-2: rgba(255, 255, 255, 0.14);
  --border-strong: rgba(255, 255, 255, 0.22);

  /* Ink */
  --ink: #fafafa;
  --ink-2: rgba(250, 250, 250, 0.72);
  --ink-3: rgba(250, 250, 250, 0.48);
  --ink-4: rgba(250, 250, 250, 0.3);

  /* Accent (overridden by tweaks) */
  --accent: #7fd1de;
  --accent-ink: #0a0a0a;

  /* Layout */
  --container: 1320px;
  --gutter: 32px;
  --col-gap: 24px;

  /* Type scale */
  --t-mono: 11px;
  --t-mono-2: 13px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
  --t-fast: 0.18s var(--ease);
  --t: 0.32s var(--ease);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

img, svg, video {
  display: block;
  max-width: 100%;
}

/* Container */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container--wide {
  max-width: 1480px;
}

/* Mono labels (Swiss eyebrow) */
.mono {
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 400;
}

.mono--lg {
  font-size: var(--t-mono-2);
}

/* Section structure */
section {
  position: relative;
}

.section-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--col-gap);
  padding: 0 0 56px;
  align-items: end;
}

.section-head__index {
  color: var(--ink-3);
}

.section-head__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0;
  text-wrap: balance;
}

/* Type utilities */
.display-xl {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(3.5rem, 9vw, 9rem);
  line-height: 0.95;
  letter-spacing: -0.045em;
  margin: 0;
}

.display-l {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.035em;
  margin: 0;
}

.lead {
  font-size: clamp(1rem, 1.3vw, 1.2rem);
  line-height: 1.5;
  color: var(--ink-2);
  font-weight: 400;
  max-width: 56ch;
}

.body {
  font-size: 0.975rem;
  line-height: 1.55;
  color: var(--ink-2);
}

/* Accent text */
.accent {
  color: var(--accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: var(--t-fast);
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn--primary:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  border-color: var(--border-2);
  color: var(--ink);
}
.btn--ghost:hover {
  border-color: var(--border-strong);
  background: rgba(255,255,255,0.03);
}

.btn--arrow svg {
  transition: transform var(--t-fast);
}
.btn--arrow:hover svg {
  transform: translate(2px, -2px);
}

/* Tag chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--border-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.chip__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in oklch, var(--accent) 20%, transparent);
}

/* Divider lines */
.rule {
  height: 1px;
  background: var(--border);
  margin: 0;
  border: 0;
}

/* Generic grid */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
}

/* Animations */
@keyframes blink {
  0%, 60% { opacity: 1; }
  61%, 100% { opacity: 0.2; }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-up {
  animation: fade-up 0.8s var(--ease) both;
}

/* Selection */
::selection {
  background: var(--accent);
  color: var(--accent-ink);
}

/* Focus */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}