/* ─────────────────────────────────────────────
   ACUSTICE — Shared design tokens & primitives
   ───────────────────────────────────────────── */

:root {
  /* Color (light, neutral warm) */
  --bg:           oklch(0.985 0.003 70);
  --bg-elev:      oklch(1 0 0);
  --bg-alt:       oklch(0.955 0.005 70);
  --bg-deep:      oklch(0.18 0.005 70);
  --fg:           oklch(0.17 0.005 70);
  --fg-muted:     oklch(0.42 0.005 70);
  --fg-soft:      oklch(0.62 0.005 70);
  --fg-on-deep:   oklch(0.96 0.003 70);
  --border:       oklch(0.88 0.005 70);
  --border-soft:  oklch(0.93 0.005 70);
  --hairline:     oklch(0.85 0.005 70);

  /* Accent — matches Acustice logo (RGB 237 124 24) */
  --accent:       oklch(0.66 0.17 50);
  --accent-soft:  oklch(0.94 0.04 55);
  --accent-fg:    oklch(0.99 0.01 60);

  /* Type */
  --font-sans:    "Manrope", ui-sans-serif, sans-serif;
  --font-serif:   "Instrument Serif", "Source Serif 4", Georgia, serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;
  --font-display: var(--font-sans);
  --display-weight: 500;
  --display-tracking: -0.035em;

  /* Layout */
  --maxw: 1480px;
  --gutter: clamp(16px, 4vw, 56px);
  --section-y: clamp(72px, 10vw, 160px);
}

[data-theme="dark"] {
  --bg:           oklch(0.135 0.005 70);
  --bg-elev:      oklch(0.18 0.005 70);
  --bg-alt:       oklch(0.20 0.005 70);
  --bg-deep:      oklch(0.08 0.005 70);
  --fg:           oklch(0.97 0.003 70);
  --fg-muted:     oklch(0.72 0.005 70);
  --fg-soft:      oklch(0.55 0.005 70);
  --fg-on-deep:   oklch(0.97 0.003 70);
  --border:       oklch(0.28 0.005 70);
  --border-soft:  oklch(0.22 0.005 70);
  --hairline:     oklch(0.30 0.005 70);
  --accent-soft:  oklch(0.30 0.06 50);
}

/* Type direction: mixto — serif display */
[data-type="serif"] {
  --font-display: var(--font-serif);
  --display-weight: 400;
  --display-tracking: -0.02em;
}
[data-type="mixto"] {
  --font-display: var(--font-serif);
  --display-weight: 400;
  --display-tracking: -0.015em;
}

/* ───── Reset ───── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
hr { border: 0; border-top: 1px solid var(--hairline); margin: 0; }

/* ───── Container ───── */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.wrap-tight { max-width: 1200px; margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }

/* ───── Type primitives ───── */
.label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
  font-weight: 500;
}
.label-num::before {
  content: attr(data-num) "  —  ";
  color: var(--accent);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  line-height: 0.98;
  margin: 0;
  color: var(--fg);
  text-wrap: balance;
}
h2 { font-size: clamp(40px, 6vw, 88px); line-height: 1.0; }
h3 { font-size: clamp(28px, 3vw, 44px); line-height: 1.05; letter-spacing: -0.02em; }
h4 { font-size: clamp(18px, 1.6vw, 22px); line-height: 1.2; letter-spacing: -0.01em; font-weight: 600; font-family: var(--font-sans); }
p  { margin: 0; }
.lead {
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.45;
  color: var(--fg-muted);
  max-width: 60ch;
  text-wrap: pretty;
}

/* ───── Buttons ───── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--fg);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent); color: var(--accent-fg); }
.btn-accent {
  background: var(--accent);
  color: var(--accent-fg);
}
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--fg);
}
.btn-ghost:hover { border-color: var(--fg); }
.btn-link {
  padding: 0;
  border-radius: 0;
  border-bottom: 1px solid currentColor;
  padding-bottom: 4px;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  font-weight: 500;
}
.btn .arrow {
  display: inline-block;
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}
.btn:hover .arrow { transform: translate(2px, -2px); }

/* ───── Top bar + Header ───── */
.topbar {
  border-bottom: 1px solid var(--hairline);
  background: var(--bg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
  gap: 24px;
}
.topbar-inner .stack { display: flex; gap: 24px; align-items: center; }
.topbar-inner .pulse { display: inline-flex; align-items: center; gap: 8px; }
.topbar-inner .pulse::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 oklch(0.68 0.18 45 / 0.5); }
  50%      { box-shadow: 0 0 0 6px oklch(0.68 0.18 45 / 0); }
}

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--hairline);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 32px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
}
/* Logo image */
.brand-logo { height: 24px; width: auto; display: block; }
.brand-logo.light { display: block; }
.brand-logo.dark  { display: none; }
[data-theme="dark"] .brand-logo.light { display: none; }
[data-theme="dark"] .brand-logo.dark  { display: block; }
.site-footer .brand-logo.light { display: none; }
.site-footer .brand-logo.dark  { display: block; }
.brand { font-size: 0; }

.nav {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav a {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--fg-muted);
  padding: 8px 0;
  position: relative;
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav a:hover { color: var(--fg); }
.nav a.is-active { color: var(--fg); }
.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 2px;
  background: var(--accent);
}
.header-cta { display: flex; gap: 12px; align-items: center; }

@media (max-width: 880px) {
  .nav { display: none; }
  .topbar { display: none; }
}

/* ───── Image container ───── */
.ph {
  position: relative;
  background: var(--bg-alt);
  overflow: hidden;
  isolation: isolate;
}
.ph img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.ph:hover img { transform: scale(1.03); }
[data-theme="dark"] .ph img { filter: brightness(0.88); }

/* ───── Section primitives ───── */
section { position: relative; }
.section-head {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 48px;
  padding-block: clamp(48px, 6vw, 96px) 32px;
  align-items: end;
}
.section-head .label { padding-top: 8px; }
@media (max-width: 720px) {
  .section-head { grid-template-columns: 1fr; gap: 12px; }
}

/* ───── Stats / data lockups ───── */
.data-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.data-cell {
  padding: 28px 24px 28px 0;
  border-right: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}
.data-cell:nth-child(n+1) { padding-left: 24px; }
.data-cell:first-child { padding-left: 0; }
.data-cell:last-child { border-right: 0; }
.data-cell .v {
  font-family: var(--font-display);
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.data-cell .v sup { font-size: 0.45em; vertical-align: top; color: var(--accent); margin-left: 4px; font-weight: 500; }
.data-cell .k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
@media (max-width: 720px) {
  .data-row { grid-template-columns: repeat(2, 1fr); }
  .data-cell:nth-child(2) { border-right: 0; }
}

/* ───── Footer ───── */
.site-footer {
  background: var(--bg-deep);
  color: var(--fg-on-deep);
  padding: clamp(64px, 8vw, 120px) 0 32px;
}
.site-footer h2 { color: var(--fg-on-deep); }
.site-footer .footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 64px;
  border-bottom: 1px solid oklch(1 0 0 / 0.1);
}
.site-footer .col h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: oklch(0.7 0.005 70);
  margin: 0 0 18px 0;
  font-weight: 500;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.site-footer ul a {
  color: oklch(0.88 0.005 70);
  font-size: 14px;
  transition: color 0.2s ease;
}
.site-footer ul a:hover { color: var(--accent); }
.site-footer .office {
  font-size: 13px;
  color: oklch(0.78 0.005 70);
  line-height: 1.65;
}
.site-footer .office strong { color: var(--fg-on-deep); font-weight: 600; display: block; margin-bottom: 4px; }
.site-footer .footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: oklch(0.6 0.005 70);
  gap: 24px;
  flex-wrap: wrap;
}
@media (max-width: 880px) {
  .site-footer .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .site-footer .footer-top { grid-template-columns: 1fr; }
}

/* ───── Cert / logo strip ───── */
.cert-strip {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.cert-chip {
  flex: 1 1 auto;
  min-width: 140px;
  padding: 26px 20px;
  border-right: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.cert-chip:last-child { border-right: 0; }
.cert-chip .badge {
  width: 28px; height: 28px;
  border: 1px solid var(--border);
  display: grid; place-items: center;
  font-size: 10px;
  border-radius: 4px;
  color: var(--fg);
  background: var(--bg-elev);
}

/* ───── Misc utilities ───── */
.row { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.between { display: flex; justify-content: space-between; align-items: end; gap: 24px; flex-wrap: wrap; }
.muted { color: var(--fg-muted); }
.mono { font-family: var(--font-mono); }
.serif { font-family: var(--font-serif); font-weight: 400; }
.accent { color: var(--accent); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }