/* ====================================================================
   Pixel Auditor — pixelauditor.com (supporting one-page site)
   Self-contained stylesheet. Brand-aligned with the main product site.
   ==================================================================== */

/* ---------- TOKENS ---------- */
:root {
  --bg: #fbfbfd;
  --bg-elev: #f4f4f8;
  --bg-deep: #ecebf2;
  --ink: #14141b;
  --ink-2: #2e2e3a;
  --ink-3: #5a5a68;
  --ink-4: #8c8c97;
  --ink-5: #c8c8d0;
  --line: #e6e5ec;
  --line-2: #d1d0d9;
  --accent: #7c3aed;
  --accent-soft: #ede9fe;
  --accent-ink: #5b21b6;
  --good: #15803d;
  --warn: #b45309;
  --bad: #b91c1c;

  --font-sans: "Geist", "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --max-w: 1240px;
  --gutter: clamp(20px, 4vw, 56px);

  --shadow-sm: 0 1px 0 rgba(19,19,17,.04), 0 1px 2px rgba(19,19,17,.04);
  --shadow: 0 1px 0 rgba(19,19,17,.04), 0 8px 24px -8px rgba(19,19,17,.12);
  --shadow-lg: 0 24px 60px -20px rgba(19,19,17,.18);
}

[data-theme="dark"] {
  --bg: #0d0d12;
  --bg-elev: #16161e;
  --bg-deep: #1d1d27;
  --ink: #f5f5fa;
  --ink-2: #e1e1ea;
  --ink-3: #b0b0bd;
  --ink-4: #86868f;
  --ink-5: #3a3a44;
  --line: #26262e;
  --line-2: #36363f;
  --accent: #a78bfa;
  --accent-soft: #2e1b54;
  --accent-ink: #c4b5fd;
  --good: #4ade80;
  --warn: #f59e0b;
  --bad: #f87171;
  --shadow-sm: 0 1px 0 rgba(0,0,0,.3);
  --shadow: 0 1px 0 rgba(0,0,0,.3), 0 8px 24px -8px rgba(0,0,0,.5);
  --shadow-lg: 0 24px 60px -20px rgba(0,0,0,.7);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0d0d12;
    --bg-elev: #16161e;
    --bg-deep: #1d1d27;
    --ink: #f5f5fa;
    --ink-2: #e1e1ea;
    --ink-3: #b0b0bd;
    --ink-4: #86868f;
    --ink-5: #3a3a44;
    --line: #26262e;
    --line-2: #36363f;
    --accent: #a78bfa;
    --accent-soft: #2e1b54;
    --accent-ink: #c4b5fd;
    --good: #4ade80;
    --warn: #f59e0b;
    --bad: #f87171;
  }
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: white; }
code, .mono { font-family: var(--font-mono); font-size: .92em; }

:where(a, button, input, select, textarea, summary):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--bg);
  padding: 10px 16px; z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

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

.section {
  padding: clamp(64px, 8vw, 112px) 0;
  border-top: 1px solid var(--line);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ink-4);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.head { max-width: 720px; margin-bottom: 48px; }

/* Type */
.h-display {
  font-size: clamp(34px, 5.4vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 18px 0 0;
  max-width: 22ch;
}
.h-1 {
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0;
}
.h-2 {
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.018em;
  font-weight: 600;
  margin: 0;
}
.h-3 {
  font-size: 18px;
  line-height: 1.3;
  font-weight: 600;
  margin: 0;
}
.lead {
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 64ch;
  margin: 18px 0 0;
}
.link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.link:hover { color: var(--accent-ink); }

/* ---------- NAV ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg) 86%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-flex;
  width: 26px; height: 26px;
  color: var(--accent);
}
.brand-mark svg { width: 100%; height: 100%; }

.nav-links {
  list-style: none;
  margin: 0 auto 0 24px;
  padding: 0;
  display: flex;
  gap: 26px;
  align-items: center;
}
.nav-links a {
  font-size: 14px;
  color: var(--ink-2);
}
.nav-links a:hover { color: var(--ink); }

.nav-cta { display: flex; align-items: center; gap: 8px; margin-left: auto; }

.theme-toggle {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 34px; height: 34px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  background: var(--bg-elev);
}
.theme-toggle:hover { color: var(--ink); border-color: var(--line-2); }
.theme-toggle .ic-sun, .theme-toggle .ic-moon { display: none; }
:root:not([data-theme]) .theme-toggle .ic-moon { display: block; }
[data-theme="light"] .theme-toggle .ic-moon { display: block; }
[data-theme="dark"] .theme-toggle .ic-sun { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .ic-moon { display: none; }
  :root:not([data-theme]) .theme-toggle .ic-sun { display: block; }
}

.nav-toggle { display: none; }
.nav-toggle .ic-bar {
  display: block; width: 18px; height: 1.5px;
  background: var(--ink-2);
  margin: 4px 0;
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform .12s ease, background .15s ease, border-color .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: var(--ink-2); }
.btn-accent {
  background: var(--accent);
  color: white;
}
.btn-accent:hover { background: var(--accent-ink); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--ink-2);
  border-color: var(--line-2);
}
.btn-ghost:hover { background: var(--bg-elev); color: var(--ink); }

/* ---------- HERO ---------- */
.hero {
  padding: clamp(56px, 8vw, 120px) 0 clamp(40px, 6vw, 80px);
  background:
    radial-gradient(900px 360px at 20% -10%, color-mix(in oklab, var(--accent) 18%, transparent), transparent 70%),
    radial-gradient(700px 300px at 100% 0%, color-mix(in oklab, var(--accent) 10%, transparent), transparent 70%);
}
.hero-inner { max-width: 920px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  padding: 6px 12px;
  border: 1px solid var(--line-2);
  background: var(--bg-elev);
  border-radius: 999px;
  color: var(--ink-2);
}
.badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--good);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--good) 22%, transparent);
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 36px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.hero-meta li {
  display: flex;
  flex-direction: column;
  padding: 0 28px 0 0;
  margin-right: 28px;
  border-right: 1px solid var(--line);
  min-width: 0;
}
.hero-meta li:last-child { border-right: 0; padding-right: 0; margin-right: 0; }
.hero-meta li .mono {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.hero-meta li span:last-child {
  font-size: 13px;
  color: var(--ink-3);
  margin-top: 2px;
}

/* ---------- SPLIT (definition section) ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: clamp(28px, 5vw, 80px);
  align-items: start;
}
.split-body p { margin: 18px 0 0; color: var(--ink-2); }
.def-rows {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.def-rows li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.def-rows li > span {
  color: var(--ink-4);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.def-rows li > strong { color: var(--ink); font-weight: 500; }
.def-rows a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- CAPABILITIES ---------- */
.section-cap { background: var(--bg-elev); }
.cap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.cap {
  background: var(--bg);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 200px;
}
.cap-id {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-4);
  text-transform: uppercase;
}
.cap h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}
.cap p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-3);
}
.cap code {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 0 5px;
  border-radius: 4px;
  font-size: 12.5px;
}
.cap-foot { margin-top: 28px; }

/* ---------- COVERAGE ---------- */
.cov-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.cov-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}
.cov-mark {
  width: 14px; height: 14px;
  border-radius: 4px;
  flex-shrink: 0;
}
.cov-card.sst .cov-mark {
  background: linear-gradient(135deg, var(--accent), color-mix(in oklab, var(--accent) 50%, var(--good)));
}
.cov-name { font-size: 14px; font-weight: 500; color: var(--ink); }
.cov-code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-4);
  margin-top: 2px;
}

/* ---------- HOW ---------- */
.how-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  counter-reset: step;
}
.how-list li {
  position: relative;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg);
}
.how-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--accent);
  margin-bottom: 12px;
}
.how-list h3 { margin: 0 0 8px; font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.how-list p { margin: 0; color: var(--ink-3); font-size: 14.5px; }

/* ---------- WHO ---------- */
.who-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.who {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg);
}
.who h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}
.who p { margin: 0; color: var(--ink-3); font-size: 14.5px; line-height: 1.6; }
.who code {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 0 5px; border-radius: 4px;
  font-size: 12.5px;
}
.who-accent {
  border-color: color-mix(in oklab, var(--accent) 40%, var(--line));
  background: color-mix(in oklab, var(--accent-soft) 60%, var(--bg));
}

/* ---------- PRICING ---------- */
.section-price { background: var(--bg-elev); }
.price-card {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg);
}
.price-card .lead { margin-bottom: 24px; }
.price-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.price-side > div {
  padding: 18px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}
.price-side .mono {
  font-size: 24px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.price-side span:last-child {
  font-size: 13px;
  color: var(--ink-3);
  margin-top: 4px;
}

/* ---------- FAQ ---------- */
.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: clamp(28px, 5vw, 80px);
  align-items: start;
}
.faq-list { display: flex; flex-direction: column; gap: 4px; }
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: grid;
  grid-template-columns: 36px 1fr 24px;
  gap: 14px;
  align-items: center;
  font-weight: 500;
  font-size: 16px;
  color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-i {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-4);
  letter-spacing: .04em;
}
.faq-plus {
  width: 16px; height: 16px;
  position: relative;
}
.faq-plus::before, .faq-plus::after {
  content: ""; position: absolute; left: 0; right: 0; top: 50%;
  height: 1.5px; background: var(--ink-3);
}
.faq-plus::after { transform: rotate(90deg); transition: transform .2s ease; }
.faq-item[open] .faq-plus::after { transform: rotate(0deg); }
.faq-item p {
  margin: 14px 0 0 50px;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.65;
  max-width: 70ch;
}
.faq-item code {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 0 5px;
  border-radius: 4px;
  font-size: 12.5px;
}

/* ---------- CTA ---------- */
.section-cta {
  background:
    radial-gradient(700px 360px at 50% 0%, color-mix(in oklab, var(--accent) 18%, transparent), transparent 70%),
    var(--bg);
  text-align: center;
}
.cta-inner { max-width: 720px; margin: 0 auto; }
.cta-inner .lead { margin-left: auto; margin-right: auto; }
.cta-inner .hero-actions { justify-content: center; margin-top: 28px; }

/* ---------- FOOTER ---------- */
.footer {
  border-top: 1px solid var(--line);
  background: var(--bg-elev);
  padding: 56px 0 36px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
}
.footer h4 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--ink-3);
  margin: 0 0 12px;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer ul a {
  color: var(--ink-2);
  font-size: 14px;
}
.footer ul a:hover { color: var(--ink); }
.foot-tag {
  margin: 14px 0 0;
  color: var(--ink-3);
  font-size: 14px;
  max-width: 280px;
}
.footer-bottom {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-4);
  font-family: var(--font-mono);
}
.footer-bottom a { color: var(--ink-3); }
.footer-bottom a:hover { color: var(--ink); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 960px) {
  .split, .faq-grid { grid-template-columns: 1fr; }
  .how-list { grid-template-columns: 1fr; }
  .who-grid { grid-template-columns: 1fr; }
  .price-card { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute;
    inset: 64px 0 auto 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 8px 0;
    display: none;
  }
  .nav[data-open="1"] .nav-links { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px var(--gutter); font-size: 15px; }
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center; justify-content: center;
    width: 34px; height: 34px;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: var(--bg-elev);
  }
  .btn-cta-text { display: none; }
  .btn-primary.btn-sm { padding: 8px; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-meta li { padding-right: 18px; margin-right: 18px; }
  .hero-meta li .mono { font-size: 18px; }
}