/* ---------------------------------------------------
   AdBox — design tokens
--------------------------------------------------- */

:root {
  /* Neutral surfaces & text */
  --color-bg: #faf8f4;
  --color-surface: #faf8f4;
  --color-surface-alt: #f1ede5;
  --color-text: #0e0f13;
  --color-text-muted: #6b6a66;
  --color-text-inverse: #faf8f4;
  --color-text-inverse-muted: #a8a6a0;

  /* Brand — "Ad" (dark graphite) + "Box" (turquoise) */
  --color-brand-dark: #0e0f13;
  --color-brand-turquoise: #0d9488;
  --color-brand-turquoise-deep: #0b7a70;
  --color-brand-turquoise-soft: #e1f5f2;
  --color-brand-turquoise-on-dark: #4dd0c0;

  /* Functional */
  --color-border: rgba(14, 15, 19, 0.1);
  --color-border-on-dark: rgba(250, 248, 244, 0.14);
  --color-accent: #0b7a70;
  --color-focus: #0d9488;
  --color-text-body: #33322f;

  /* Radius scale */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  --font-sans: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;

  --max: 1120px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

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

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

#top,
#preview,
#about,
#who,
#discovery,
#process {
  scroll-margin-top: 96px;
}

body.nav-open {
  overflow: hidden;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-brand-dark);
  color: var(--color-text-inverse);
  padding: 12px 18px;
  z-index: 200;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

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

/* Brand mark: "Ad" dark / "Box" turquoise */
.brand-ad { color: var(--color-brand-dark); }
.brand-box { color: var(--color-brand-turquoise); }

/* ---------------------------------------------------
   Header
--------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 86%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-mark { border-radius: 7px; }

.logo-word {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  gap: clamp(16px, 3vw, 30px);
}

.site-nav a {
  position: relative;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  opacity: 0.72;
  padding-bottom: 4px;
  transition: opacity 0.15s ease, color 0.15s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-brand-turquoise);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  opacity: 1;
  color: var(--color-brand-turquoise-deep);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

/* Mobile menu toggle — hidden on desktop/tablet, shown only at the
   mobile breakpoint where .site-nav becomes a collapsible panel */

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  flex: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s ease, background 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s ease, top 0.2s ease;
}

.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ---------------------------------------------------
   Hero
--------------------------------------------------- */

.hero {
  background: var(--color-brand-dark);
  color: var(--color-text-inverse);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(680px 420px at 82% -10%, color-mix(in srgb, var(--color-brand-turquoise) 24%, transparent), transparent 60%),
    radial-gradient(520px 360px at 100% 100%, color-mix(in srgb, var(--color-brand-turquoise) 12%, transparent), transparent 65%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: clamp(32px, 6vw, 64px);
  padding-top: clamp(52px, 11vw, 132px);
  padding-bottom: clamp(52px, 11vw, 132px);
}

.hero h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(3.2rem, 8vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.01em;
  margin: 0 0 22px;
}

.hero .brand-ad { color: var(--color-text-inverse); }

.hero-tagline {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.35;
  color: color-mix(in srgb, var(--color-text-inverse) 92%, transparent);
  margin: 0 0 24px;
}

.hero-lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.55;
  color: color-mix(in srgb, var(--color-text-inverse) 82%, transparent);
  max-width: 48ch;
  margin: 0 0 16px;
}

.hero-support {
  font-size: clamp(0.92rem, 1.3vw, 1.02rem);
  line-height: 1.5;
  color: color-mix(in srgb, var(--color-text-inverse) 70%, transparent);
  max-width: 50ch;
  margin: 0 0 28px;
}

.hero .status-badge { margin: 0; }

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.box-frame {
  width: min(280px, 100%);
  aspect-ratio: 1;
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-xl);
  padding: 18px;
  display: flex;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.03), transparent 60%);
  box-shadow: 0 0 0 1px transparent, 0 30px 60px -30px color-mix(in srgb, var(--color-brand-turquoise) 45%, transparent);
}

.box-frame-inner {
  flex: 1;
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.02);
}

.box-frame-inner img { width: 46%; height: auto; }

/* ---------------------------------------------------
   Sections
--------------------------------------------------- */

.section {
  padding: clamp(44px, 9vw, 108px) 0;
}

.section-alt {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  letter-spacing: -0.01em;
  margin: 0 0 36px;
}

.section-subtitle {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}

.section-kicker {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 14px;
}

/* About / Background */

.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(24px, 5vw, 64px);
  align-items: start;
}

.about-body p {
  font-size: 1.08rem;
  line-height: 1.75;
  color: var(--color-text-body);
  max-width: 62ch;
  margin: 0 0 20px;
}

.about-body p:last-child { margin-bottom: 0; }

.about-note {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin: -6px 0 24px;
}

.meta-strip {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
}

.meta-strip li:not(:first-child) {
  margin-left: 12px;
  padding-left: 12px;
  border-left: 1px solid var(--color-border);
}

/* Focus / exploring grid (shared card component) */

.focus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.focus-grid--3 { grid-template-columns: repeat(3, 1fr); }
.focus-grid--2 { grid-template-columns: repeat(2, 1fr); }

.focus-card {
  background: var(--color-surface);
  padding: 32px 26px;
  transition: box-shadow 0.2s ease, background-color 0.2s ease;
}

.focus-card--compact {
  padding: 20px 22px;
}

.focus-card-label {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.focus-card:hover,
.focus-card:focus-within {
  box-shadow: inset 0 0 0 1px var(--color-brand-turquoise);
  background: color-mix(in srgb, var(--color-brand-turquoise-soft) 55%, var(--color-surface));
}

.focus-dot {
  display: block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-brand-turquoise);
  margin-bottom: 24px;
}

.focus-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.focus-card p {
  font-size: 0.94rem;
  line-height: 1.55;
  color: var(--color-text-muted);
  margin: 0;
}

/* Small muted line under a block — disclaimers, framing notes */

.section-footnote {
  margin: 16px 0 0;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* ---------------------------------------------------
   Capability preview (concept mockup — static, non-interactive)
--------------------------------------------------- */

.preview-frame {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 4vw, 32px);
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(16px, 3vw, 28px);
  margin: 0 0 24px;
}

.preview-doc,
.preview-results {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
}

.preview-doc-title,
.preview-results-title {
  margin: 0 0 16px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.preview-doc-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.preview-doc-lines li {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
}

/* Synthetic requirement -> rule -> evidence -> check chain */

.preview-doc-lines--chain li {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.preview-line-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.preview-line-value {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
}

.preview-chain-status {
  margin: 14px 0 0;
}

.preview-findings {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.preview-findings li {
  padding-left: 14px;
  border-left: 2px solid var(--color-brand-turquoise-deep);
}

.preview-finding-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
}

.preview-finding-label {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-text);
}

.finding-badge {
  display: inline-block;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-brand-turquoise);
  background: var(--color-brand-turquoise-soft);
  color: var(--color-brand-turquoise-deep);
  white-space: nowrap;
}

.preview-finding-desc {
  display: block;
  font-size: 0.86rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.preview-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.preview-btn {
  appearance: none;
  -webkit-appearance: none;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  cursor: not-allowed;
}

/* ---------------------------------------------------
   Discovery / future direction
--------------------------------------------------- */

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-brand-turquoise);
  background: var(--color-brand-turquoise-soft);
  color: var(--color-brand-turquoise-deep);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 6px 14px 6px 10px;
  border-radius: var(--radius-pill);
  margin: 0 0 20px;
}

.status-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-brand-turquoise);
  flex: none;
}

.discovery-intro { max-width: 68ch; margin: 0 0 32px; }

/* Discovery subsections: Focus areas / How AdBox works / Where this
   can help / Grounded in share one spacing rhythm */

.discovery-section { margin: 0 0 40px; }
.discovery-section:last-child { margin-bottom: 0; }

.process-lede {
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 0 20px;
}

/* Where this can help: a plain value list, deliberately distinct
   from the "Grounded in" cards below */

.help-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 32px;
  margin: 0;
  padding: 0;
}

.help-list li {
  position: relative;
  padding-left: 20px;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text-body);
}

.help-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 10px;
  height: 2px;
  background: var(--color-brand-turquoise);
}

/* Product Discovery progress stepper */

.progress-track {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  margin: 0;
  padding: 0;
}

.progress-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
}

.progress-step:not(:first-child)::before {
  content: "→";
  flex: none;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.progress-step-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
  min-width: 108px;
  padding: 0 6px;
}

.progress-step-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text);
}

.progress-step-status {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.progress-step.is-done .progress-step-status {
  color: #ffffff;
  background: var(--color-brand-turquoise-deep);
  border-color: var(--color-brand-turquoise-deep);
}

.progress-step.is-active .progress-step-status {
  color: var(--color-brand-turquoise-deep);
  background: var(--color-brand-turquoise-soft);
  border-color: var(--color-brand-turquoise);
}

.progress-step.is-next .progress-step-status {
  color: var(--color-text);
  background: var(--color-bg);
  border-color: var(--color-text);
}

.progress-step.is-later .progress-step-status {
  color: var(--color-text-muted);
  background: var(--color-bg);
  border-color: var(--color-border);
}

/* Process box */

.process {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 28px);
  margin: 0;
  padding: clamp(28px, 4vw, 44px) clamp(16px, 4vw, 32px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.process-inputs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.process-group-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 10px;
  text-align: center;
}

.process-chip {
  display: inline-block;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.process-arrow {
  color: var(--color-brand-turquoise);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
}

.process-core {
  border: 1px solid var(--color-brand-turquoise);
  background: var(--color-brand-turquoise-soft);
  border-radius: var(--radius-md);
  padding: 20px 26px;
  text-align: center;
  min-width: 200px;
}

.process-core-label {
  display: block;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-brand-dark);
  margin: 0 0 12px;
}

.process-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 8px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent);
}

.process-steps li:not(:last-child)::after {
  content: "→";
  margin-left: 8px;
  color: var(--color-brand-turquoise);
  font-weight: 400;
}

.process-output {
  border: 1px solid var(--color-brand-turquoise-deep);
  background: var(--color-brand-turquoise-deep);
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.82rem;
  padding: 11px 24px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

/* ---------------------------------------------------
   Footer
--------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}

.footer-note {
  margin: 0;
  font-size: 0.86rem;
  color: var(--color-text-muted);
}

/* ---------------------------------------------------
   Responsive
--------------------------------------------------- */

@media (max-width: 860px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-visual { order: -1; }
  .box-frame { width: min(180px, 60vw); margin: 0 auto; }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .focus-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .focus-grid--3 {
    grid-template-columns: 1fr;
  }

  .process {
    flex-direction: column;
  }
  .process-arrow {
    transform: rotate(90deg);
  }

  /* Compact 2-up input grid instead of 4 stacked rows */
  .process-inputs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  .process-group-label {
    grid-column: 1 / -1;
  }

  /* Pair the five steps two-per-row instead of one long stack */
  .process-steps {
    display: grid;
    grid-template-columns: repeat(2, auto);
    justify-content: center;
    gap: 10px 18px;
  }
  .process-steps li:last-child {
    grid-column: 1 / -1;
  }
  .process-steps li::after {
    content: none;
  }
  .process-steps li:nth-child(odd):not(:last-child)::after {
    content: "→";
    margin-left: 8px;
    color: var(--color-brand-turquoise);
    font-weight: 400;
  }

  .preview-grid {
    grid-template-columns: 1fr;
  }

  /* Stack the progress steps instead of wrapping mid-flow */
  .progress-track {
    flex-direction: column;
    gap: 4px;
  }
  .progress-step {
    width: 100%;
    align-items: flex-start;
  }
  .progress-step:not(:first-child)::before {
    content: "↓";
  }
  .progress-step-body {
    align-items: flex-start;
    text-align: left;
    min-width: 0;
  }
}

@media (max-width: 560px) {
  /* Collapsible mobile nav: hamburger replaces the inline link row */
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 4px var(--gutter) 12px;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 16px 28px -16px rgba(14, 15, 19, 0.22);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    opacity: 1;
    padding: 13px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border);
  }
  .site-nav a:last-child { border-bottom: none; }
  .site-nav a::after { display: none; }

  .focus-grid { grid-template-columns: 1fr; }
  .focus-card { padding: 24px 20px; }

  .help-list { grid-template-columns: 1fr; }

  .meta-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .meta-strip li:not(:first-child) {
    margin-left: 0;
    padding-left: 0;
    border-left: none;
  }

  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Mobile-only density pass (~15-25% tighter); tablet/desktop untouched */
  .section { padding: 36px 0; }
  .hero-grid { padding-top: 40px; padding-bottom: 40px; }
  .hero h1 { margin-bottom: 18px; }
  .hero-tagline { margin-bottom: 20px; }
  .hero-lede { margin-bottom: 14px; }
  .hero-support { margin-bottom: 22px; }
  .section-title { margin-bottom: 28px; }
  .section-subtitle { margin-bottom: 16px; }
  .discovery-intro { margin-bottom: 24px; }
  .discovery-section { margin-bottom: 30px; }
  .preview-frame { padding: 16px; }
  .preview-grid { gap: 14px; margin-bottom: 18px; }
  .preview-doc, .preview-results { padding: 16px; }
  .process { padding: 22px 14px; }
}