/* =========================================================
   VisibilityOS — Landing styles
   Design tokens follow Neumeier's "brand commitment" principle:
   one primary color, one accent, two type weights, no decoration.
   ========================================================= */

:root {
  /* Colors */
  --bg: #0A0A0A;
  --bg-elev: #131313;
  --bg-card: #1A1A1A;
  --border: #262626;
  --text: #F5F5F5;
  --text-dim: #A3A3A3;
  --text-muted: #737373;
  --primary: #00D084;       /* AI-Green — confidence signal */
  --primary-hover: #00B872;
  --accent: #0066FF;
  --warn: #FFB020;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Radii */
  --radius-1: 6px;
  --radius-2: 10px;
  --radius-3: 16px;

  /* Container */
  --container: 1120px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, ul, ol, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }
input, select, textarea, button { font-family: inherit; }

/* Base */
html, body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: #000;
  padding: var(--space-3) var(--space-4);
  z-index: 999;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: 18px;
}
.brand-mark {
  color: var(--primary);
  font-size: 20px;
  line-height: 1;
}
.brand-name { letter-spacing: -0.01em; }
.brand-os { color: var(--primary); font-weight: 700; }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  font-size: 15px;
  color: var(--text-dim);
}
.site-nav a:hover { color: var(--text); }
.site-nav .nav-cta {
  background: var(--primary);
  color: #000;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-1);
  font-weight: 600;
}
.site-nav .nav-cta:hover { background: var(--primary-hover); color: #000; }

@media (max-width: 720px) {
  .site-nav a:not(.nav-cta) { display: none; }
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 22px;
  border-radius: var(--radius-1);
  font-weight: 600;
  font-size: 16px;
  border: 1px solid transparent;
  transition: background 120ms ease, transform 120ms ease, box-shadow 120ms ease;
  text-align: center;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #000;
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-outline {
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--text-dim); }
.btn-full { width: 100%; }
.btn-spinner { display: none; }
.btn.is-loading .btn-label { opacity: 0; }
.btn.is-loading .btn-spinner {
  display: block;
  position: absolute;
  width: 18px; height: 18px;
  border: 2px solid rgba(0,0,0,.3);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin .6s linear infinite;
}
.btn { position: relative; }

@keyframes spin { to { transform: rotate(360deg); } }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  padding: var(--space-8) 0 var(--space-9);
  background:
    radial-gradient(900px 400px at 50% -10%, rgba(0,208,132,0.10), transparent 60%),
    radial-gradient(700px 300px at 10% 30%, rgba(0,102,255,0.08), transparent 60%);
}
.eyebrow {
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}
.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 700;
  max-width: 900px;
}
.lead {
  margin-top: var(--space-5);
  font-size: clamp(18px, 1.7vw, 21px);
  color: var(--text-dim);
  max-width: 720px;
}
.hero-cta {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
}
.microcopy {
  color: var(--text-muted);
  font-size: 14px;
}

.trust-row {
  margin-top: var(--space-7);
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
  align-items: center;
  color: var(--text-muted);
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.trust-row li {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-1);
  background: var(--bg-elev);
  color: var(--text-dim);
}

/* =========================================================
   Sections
   ========================================================= */
.section { padding: var(--space-9) 0; border-top: 1px solid var(--border); }
.section h2 {
  font-size: clamp(28px, 3.5vw, 38px);
  letter-spacing: -0.01em;
  font-weight: 700;
  max-width: 800px;
}
.section-lead {
  margin-top: var(--space-4);
  color: var(--text-dim);
  font-size: 18px;
  max-width: 760px;
}

/* Problem */
.problem-grid {
  margin-top: var(--space-7);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
}
.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: var(--space-6);
}
.problem-stat {
  font-size: 44px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}
.problem-label {
  margin-top: var(--space-3);
  color: var(--text-dim);
  font-size: 15px;
}

/* How it works */
.how-steps {
  margin-top: var(--space-7);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
}
.how-steps li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: var(--space-6);
}
.step-num {
  display: inline-block;
  font-family: var(--font-mono);
  color: var(--primary);
  font-size: 13px;
  margin-bottom: var(--space-3);
}
.how-steps h3 {
  font-size: 20px;
  margin-bottom: var(--space-2);
}
.how-steps p { color: var(--text-dim); font-size: 15px; }

/* Sample preview */
.sample-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: center;
}
@media (max-width: 800px) {
  .sample-grid { grid-template-columns: 1fr; }
}
.check-list {
  margin-top: var(--space-5);
  display: grid;
  gap: var(--space-3);
}
.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--text-dim);
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}
.link-arrow {
  display: inline-block;
  margin-top: var(--space-5);
  color: var(--primary);
  font-weight: 600;
}
.link-arrow:hover { text-decoration: underline; }

.sample-preview {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-3);
  padding: var(--space-5);
}
.sample-mock { display: grid; gap: var(--space-4); }
.mock-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.mock-dot {
  width: 10px; height: 10px;
  background: var(--primary);
  border-radius: 50%;
}
.mock-score { display: flex; align-items: center; gap: var(--space-4); }
.mock-circle {
  width: 96px; height: 96px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column;
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  border: 3px solid var(--primary);
}
.mock-circle span { font-size: 13px; color: var(--text-dim); font-weight: 500; }
.mock-score p { color: var(--text-dim); font-size: 14px; }
.mock-bars { display: grid; gap: var(--space-3); }
.mock-bars .bar {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-3);
  align-items: center;
  font-size: 13px;
  color: var(--text-dim);
}
.mock-bars .bar i {
  display: block;
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  position: relative;
  overflow: hidden;
}
.mock-bars .bar i::after {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: var(--w);
  background: var(--primary);
  border-radius: inherit;
}
.mock-findings { font-size: 13px; color: var(--text-dim); display: grid; gap: var(--space-2); }
.mock-findings p { padding-left: 14px; position: relative; }
.mock-findings p::before {
  content: "▸"; position: absolute; left: 0; color: var(--primary);
}

/* =========================================================
   Form
   ========================================================= */
.form-section { background: var(--bg-elev); }
.form-wrapper {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}
.form-lead { margin-top: var(--space-4); color: var(--text-dim); }
.lead-form {
  margin-top: var(--space-6);
  display: grid;
  gap: var(--space-4);
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: var(--space-6);
}
.field { display: grid; gap: var(--space-2); }
.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}
.field input,
.field select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-1);
  color: var(--text);
  padding: 12px 14px;
  font-size: 16px;
  transition: border-color 120ms ease;
}
.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
}
.field-honeypot { display: none !important; }
.form-microcopy {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}
.form-status {
  text-align: center;
  font-size: 14px;
  min-height: 20px;
}
.form-status.success { color: var(--primary); }
.form-status.error { color: #ff6b6b; }

/* =========================================================
   Pricing
   ========================================================= */
.pricing-grid {
  margin-top: var(--space-7);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}
.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.price-card.highlight {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(0, 208, 132, 0.2);
}
.price-card h3 {
  font-size: 22px;
  letter-spacing: -0.01em;
}
.price-card .price {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.price-card .price-sub { color: var(--text-muted); font-size: 14px; }
.price-card ul { display: grid; gap: var(--space-2); }
.price-card li {
  position: relative;
  padding-left: 24px;
  color: var(--text-dim);
  font-size: 15px;
}
.price-card li::before {
  content: "→";
  position: absolute; left: 0; color: var(--primary);
}
.price-card .btn { margin-top: auto; }

/* =========================================================
   Founder
   ========================================================= */
.founder-inner { max-width: 720px; }
.founder-inner p {
  margin-top: var(--space-4);
  color: var(--text-dim);
  font-size: 17px;
}
.founder-mantra {
  font-size: 22px !important;
  color: var(--primary) !important;
  font-style: italic;
}

/* =========================================================
   FAQ
   ========================================================= */
.faq details {
  border-bottom: 1px solid var(--border);
  padding: var(--space-5) 0;
}
.faq details:last-of-type { border-bottom: none; }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 18px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--primary);
  font-size: 24px;
  line-height: 1;
  transition: transform 200ms;
}
.faq details[open] summary::after { content: "–"; }
.faq details p {
  margin-top: var(--space-4);
  color: var(--text-dim);
  font-size: 16px;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-7) 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
}
.footer-brand {
  font-size: 18px;
  font-weight: 600;
}
.footer-tagline {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: var(--space-2);
}
.footer-meta {
  text-align: right;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-meta p { margin-bottom: var(--space-1); }

/* =========================================================
   Thank-you page
   ========================================================= */
.thanks-body { background: var(--bg); min-height: 100vh; display: flex; flex-direction: column; }
.thanks-main { padding: var(--space-8) var(--space-5); flex: 1; }
.thanks-card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-3);
  padding: var(--space-8);
}
.thanks-eyebrow {
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.thanks-card h1 {
  margin-top: var(--space-3);
  font-size: clamp(26px, 3.5vw, 36px);
  letter-spacing: -0.01em;
}
.thanks-lead { margin-top: var(--space-4); color: var(--text-dim); font-size: 17px; }
.thanks-grid {
  margin-top: var(--space-6);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-4);
  border-block: 1px solid var(--border);
  padding-block: var(--space-5);
}
.thanks-stat { font-size: 32px; font-weight: 700; color: var(--primary); }
.thanks-label { color: var(--text-dim); font-size: 13px; margin-top: var(--space-1); }
.thanks-next { margin-top: var(--space-6); }
.thanks-next h2 { font-size: 22px; }
.thanks-next p { color: var(--text-dim); margin-block: var(--space-3); }
.thanks-next .btn { margin-top: var(--space-3); }
.thanks-back { margin-top: var(--space-6); color: var(--text-muted); font-size: 14px; }
.thanks-back a:hover { color: var(--primary); }

/* =========================================================
   Sample audit page
   ========================================================= */
.sample-page { padding: var(--space-8) var(--space-5); }
.sample-page h1 { font-size: clamp(28px, 4vw, 42px); margin-top: var(--space-3); }
.sample-doc {
  margin-top: var(--space-7);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-3);
  padding: var(--space-7);
}
.sample-doc h2 {
  font-size: 22px;
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}
.sample-doc h2:first-of-type { margin-top: 0; }
.sample-doc h3 { font-size: 18px; margin-top: var(--space-4); margin-bottom: var(--space-2); }
.sample-doc p, .sample-doc li { color: var(--text-dim); }
.sample-doc ol, .sample-doc ul {
  padding-left: var(--space-5);
  list-style-position: inside;
  margin-top: var(--space-2);
}
.sample-doc ol li, .sample-doc ul li { list-style: decimal; padding-left: var(--space-2); margin-bottom: var(--space-1); }
.sample-doc ul li { list-style: disc; }
.sample-doc code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--primary);
}
.sample-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-4);
  font-size: 14px;
}
.sample-table th, .sample-table td {
  border-bottom: 1px solid var(--border);
  padding: var(--space-3);
  text-align: left;
}
.sample-table th {
  color: var(--text);
  font-weight: 600;
  background: var(--bg);
}
.query-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-2);
  padding: var(--space-5);
  margin-top: var(--space-3);
}
.sample-cta {
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  color: var(--primary);
}
.sample-back {
  margin-top: var(--space-7);
  text-align: center;
  display: grid;
  gap: var(--space-3);
}
.sample-back .microcopy a { color: var(--primary); }
.sample-back .microcopy a:hover { text-decoration: underline; }