/* ============================================================
   AI-scapes — Public landing page
   Vanilla CSS, no build step. Deployed to GitHub Pages.
   Palette mirrors the extension's setup.html / consent.html.
   ============================================================ */

:root {
  --c-primary: #5a9fd4;
  --c-primary-dark: #4a8bc2;
  --c-primary-deep: #2d6a99;
  --c-slate: #2d3748;
  --c-slate-soft: #1a202c;
  --c-bg: #f8fafb;
  --c-bg-alt: #eef7fd;
  --c-surface: #ffffff;
  --c-text: #1f2933;
  --c-text-muted: #6c757d;
  --c-border: #e2e8f0;
  --c-border-strong: #cbd5e0;
  --c-success: #28a745;
  --c-warning: #ffc107;

  --shadow-soft: 0 1px 2px rgba(45, 55, 72, 0.04), 0 4px 12px rgba(45, 55, 72, 0.06);
  --shadow-lift: 0 4px 12px rgba(90, 159, 212, 0.3);
  --shadow-card-hover: 0 12px 32px rgba(45, 55, 72, 0.10);

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-pill: 999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 72px;
  --space-8: 96px;

  --content-max: 1120px;
  --reading-max: 720px;

  --font-stack: -apple-system, BlinkMacSystemFont, 'Inter', 'Roboto',
                'Helvetica Neue', Arial, sans-serif;

  --transition-fast: 0.15s ease;
  --transition: 0.3s ease;
}

/* ---------- reset / base ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--c-primary-deep);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--c-slate);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--c-primary);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

h1, h2, h3, h4 {
  margin: 0 0 var(--space-3);
  color: var(--c-slate);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 { font-size: clamp(2.2rem, 4vw + 1rem, 3.4rem); }
h2 { font-size: clamp(1.7rem, 2vw + 1rem, 2.3rem); }
h3 { font-size: 1.2rem; }

p { margin: 0 0 var(--space-3); }

ul, ol {
  margin: 0 0 var(--space-3);
  padding-left: 1.25rem;
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -100px;
  background: var(--c-slate);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--r-sm);
  z-index: 200;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: var(--space-3);
  color: #fff;
}

.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section {
  padding: var(--space-7) 0;
}

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

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-primary-deep);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.section-lead {
  max-width: var(--reading-max);
  color: var(--c-text-muted);
  font-size: 1.05rem;
}

/* ---------- header / nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 251, 0.78);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.85);
  border-bottom-color: var(--c-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--c-slate);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.brand img {
  height: 36px;
  width: auto;
}

.brand:hover { color: var(--c-primary-deep); }

.primary-nav {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

/* Only style plain links inside the nav. Button-styled links keep their
   own padding, color, font, and hover treatment from .btn / .btn--primary. */
.primary-nav a:not(.btn) {
  color: var(--c-slate);
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-1) 0;
  position: relative;
}

.primary-nav a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  height: 2px;
  width: 0;
  background: var(--c-primary);
  transition: width var(--transition);
}

.primary-nav a:not(.btn):hover::after,
.primary-nav a:not(.btn):focus::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--c-border-strong);
  border-radius: var(--r-sm);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--c-slate);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  margin: 4px 0;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 28px;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 1rem;
  font-family: inherit;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition),
              box-shadow var(--transition),
              background var(--transition),
              color var(--transition),
              border-color var(--transition);
  text-align: center;
  line-height: 1.2;
}

.btn--primary {
  /* Use the deeper blue so white text clears WCAG AA (~6.1:1 vs --c-primary-deep). */
  background: var(--c-primary-deep);
  color: #fff;
  box-shadow: var(--shadow-lift);
  border-color: var(--c-primary-deep);
}

.btn--primary:hover,
.btn--primary:focus {
  background: var(--c-slate);
  border-color: var(--c-slate);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(45, 55, 72, 0.35);
}

.btn--ghost {
  background: var(--c-surface);
  color: var(--c-slate);
  border-color: var(--c-border-strong);
}

.btn--ghost:hover,
.btn--ghost:focus {
  border-color: var(--c-primary);
  color: var(--c-primary-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.btn--dark {
  background: var(--c-slate);
  color: #fff;
}

.btn--dark:hover,
.btn--dark:focus {
  background: var(--c-slate-soft);
  color: #fff;
  transform: translateY(-2px);
}

.btn--sm {
  padding: 11px 22px;
  font-size: 0.92rem;
}

.btn__icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  /* Make sure clicks always reach the parent <a>, not the SVG. */
  pointer-events: none;
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-8) 0 var(--space-7);
  background:
    radial-gradient(ellipse at 12% 10%, rgba(90, 159, 212, 0.18), transparent 55%),
    radial-gradient(ellipse at 92% 90%, rgba(45, 55, 72, 0.10), transparent 60%),
    linear-gradient(180deg, var(--c-bg-alt) 0%, var(--c-bg) 80%);
}

.hero::before {
  /* subtle dotted grid */
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(45, 55, 72, 0.12) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.35;
  mask-image: linear-gradient(180deg, transparent 0%, black 30%, black 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, black 30%, black 70%, transparent 100%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: var(--space-7);
  align-items: center;
}

.hero__copy { max-width: 620px; }

.hero__title {
  margin-bottom: var(--space-3);
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--c-primary) 0%, var(--c-primary-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--c-text-muted);
  margin-bottom: var(--space-5);
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.hero__os-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.hero__os-row span {
  color: var(--c-text-muted);
  font-size: 0.9rem;
  margin-right: var(--space-2);
}

.hero__draft {
  margin-top: var(--space-4);
  display: inline-block;
  font-size: 0.78rem;
  color: #856404;
  background: #fff8e1;
  border: 1px solid #ffe082;
  padding: 6px 12px;
  border-radius: var(--r-sm);
}

/* hero visual: stylized map of Boston with floating pins */

.hero__visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  width: 100%;
  margin-left: auto;
}

.hero__visual svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 18px 40px rgba(45, 55, 72, 0.15));
}

.pin {
  transform-origin: center bottom;
  animation: pinFloat 4.5s ease-in-out infinite;
}
.pin--1 { animation-delay: 0s; }
.pin--2 { animation-delay: 0.6s; }
.pin--3 { animation-delay: 1.2s; }
.pin--4 { animation-delay: 1.8s; }

@keyframes pinFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

@media (prefers-reduced-motion: reduce) {
  .pin { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- about / two-column ---------- */

.about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: center;
}

.about__copy h2 { margin-bottom: var(--space-4); }

.about__compare {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-soft);
}

.compare-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.compare-card {
  border-radius: var(--r-md);
  padding: var(--space-3);
  border: 1px solid var(--c-border);
}

.compare-card--logged {
  background: linear-gradient(180deg, rgba(90, 159, 212, 0.08), rgba(90, 159, 212, 0.02));
  border-color: rgba(90, 159, 212, 0.3);
}

.compare-card--incognito {
  background: linear-gradient(180deg, rgba(45, 55, 72, 0.06), rgba(45, 55, 72, 0.02));
  border-color: rgba(45, 55, 72, 0.18);
}

.compare-card h4 {
  margin: 0 0 var(--space-2);
  font-size: 0.95rem;
  color: var(--c-slate);
}

.compare-card ol {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--c-text-muted);
}

.compare-card li { margin-bottom: 4px; }

.compare-vs {
  text-align: center;
  margin: var(--space-3) 0 var(--space-2);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}

/* ---------- steps ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.step-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  transition: transform var(--transition), box-shadow var(--transition),
              border-color var(--transition);
  position: relative;
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--c-border-strong);
}

.step-card__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  font-weight: 700;
  margin-bottom: var(--space-3);
  box-shadow: var(--shadow-lift);
}

.step-card h3 { margin-bottom: var(--space-2); }
.step-card p {
  color: var(--c-text-muted);
  font-size: 0.97rem;
  margin-bottom: var(--space-2);
}

.step-card__detail-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  font-size: 0.9rem;
}

.step-card__detail-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.step-card__detail-link:hover::after { transform: translateX(3px); }

.step-figure {
  margin-top: var(--space-5);
  text-align: center;
}

.step-figure img {
  border-radius: var(--r-md);
  border: 1px solid var(--c-border);
  margin: 0 auto;
  box-shadow: var(--shadow-soft);
  max-width: 600px;
}

.step-figure figcaption {
  margin-top: var(--space-2);
  color: var(--c-text-muted);
  font-size: 0.9rem;
}

/* ---------- privacy ---------- */

.privacy__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.privacy-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  transition: border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}

.privacy-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-primary);
  box-shadow: var(--shadow-card-hover);
}

.privacy-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  background: rgba(90, 159, 212, 0.12);
  color: var(--c-primary-deep);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
}

.privacy-card h3 { margin-bottom: var(--space-2); }
.privacy-card p {
  color: var(--c-text-muted);
  font-size: 0.97rem;
  margin: 0;
}

.privacy__footnote {
  margin-top: var(--space-5);
  text-align: center;
  font-size: 0.9rem;
  color: var(--c-text-muted);
}

/* ---------- team ---------- */

.team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.team-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-soft);
}

.team-card dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-2) var(--space-3);
  margin: 0;
}

.team-card dt {
  font-weight: 600;
  color: var(--c-slate);
  font-size: 0.9rem;
}

.team-card dd {
  margin: 0;
  color: var(--c-text);
  font-size: 0.95rem;
  word-break: break-word;
}

.draft-marker {
  display: inline-block;
  font-size: 0.78rem;
  color: #856404;
  background: #fff8e1;
  border: 1px solid #ffe082;
  padding: 2px 8px;
  border-radius: var(--r-sm);
  margin-left: 4px;
}

/* ---------- footer ---------- */

.site-footer {
  background: var(--c-slate);
  color: rgba(255, 255, 255, 0.78);
  padding: var(--space-6) 0 var(--space-4);
  margin-top: var(--space-7);
}

.site-footer a {
  color: #fff;
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.4);
}

.site-footer a:hover { text-decoration-color: #fff; }

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  align-items: flex-start;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: #fff;
  font-weight: 600;
}

.site-footer__brand img {
  height: 28px;
  width: auto;
}

.site-footer__links {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.site-footer__copy {
  width: 100%;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- scroll-reveal ---------- */

/* Default: reveal targets are visible. The hidden state is only enabled
   when the page successfully runs the inline `<html class="js">` shim,
   so JS failure (or blocked scripts) leaves all content visible. */

.reveal { opacity: 1; transform: none; }

.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- subpage layout (install + privacy guides) ---------- */

.subpage-hero {
  background:
    radial-gradient(ellipse at 0% 0%, rgba(90, 159, 212, 0.18), transparent 60%),
    var(--c-bg);
  padding: var(--space-7) 0 var(--space-5);
  border-bottom: 1px solid var(--c-border);
}

.subpage-hero h1 {
  margin-bottom: var(--space-2);
  font-size: clamp(2rem, 3vw + 1rem, 2.8rem);
}

.subpage-hero p {
  color: var(--c-text-muted);
  max-width: var(--reading-max);
  font-size: 1.05rem;
  margin: 0;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  margin-bottom: var(--space-3);
}

.breadcrumb a { color: var(--c-primary-deep); }

.prose {
  max-width: var(--reading-max);
  margin: 0 auto;
  padding: var(--space-7) 0;
}

.prose h2 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.prose h2:first-child { margin-top: 0; }

.prose h3 {
  margin-top: var(--space-4);
}

.prose ol li,
.prose ul li {
  margin-bottom: var(--space-2);
}

.prose code {
  font-family: 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
  background: rgba(45, 55, 72, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.prose pre {
  background: var(--c-slate);
  color: #f7fafc;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
}

.prose pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.prose blockquote {
  border-left: 4px solid var(--c-primary);
  padding: var(--space-2) var(--space-3);
  background: rgba(90, 159, 212, 0.08);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--c-slate);
  margin: var(--space-3) 0;
}

.prose figure {
  margin: var(--space-4) 0;
  text-align: center;
}

.prose figure img {
  border-radius: var(--r-md);
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-soft);
}

.prose figcaption {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  margin-top: var(--space-2);
}

.callout {
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-3) 0;
  background: var(--c-surface);
}

.callout--warn {
  border-color: #ffe082;
  background: #fff8e1;
}

.callout--info {
  border-color: rgba(90, 159, 212, 0.4);
  background: rgba(90, 159, 212, 0.08);
}

.callout strong { color: var(--c-slate); }

/* ---------- screenshot placeholders ----------
   Inline SVG figures the lab team replaces with real PNG screenshots.
   Grep for "data-screenshot=" or "SCREENSHOT PLACEHOLDER" to find them. */

.screenshot-placeholder {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  background: repeating-linear-gradient(
      45deg,
      rgba(45, 55, 72, 0.04),
      rgba(45, 55, 72, 0.04) 10px,
      rgba(45, 55, 72, 0.08) 10px,
      rgba(45, 55, 72, 0.08) 20px
  );
  border: 2px dashed var(--c-border-strong);
  border-radius: var(--r-md);
  color: var(--c-slate);
}

.screenshot-placeholder__label {
  font-family: var(--font-stack);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 14px;
  fill: var(--c-primary-deep);
}

.screenshot-placeholder__title {
  font-family: var(--font-stack);
  font-weight: 600;
  font-size: 22px;
  fill: var(--c-slate);
}

.screenshot-placeholder__path {
  font-family: 'SFMono-Regular', Menlo, Consolas, monospace;
  font-size: 14px;
  fill: var(--c-text-muted);
}

.screenshot-placeholder__icon {
  fill: none;
  stroke: var(--c-primary-deep);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .hero__inner,
  .about__grid,
  .team__grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .hero__visual {
    margin: 0 auto;
    max-width: 360px;
  }

  .steps,
  .privacy__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .section { padding: var(--space-6) 0; }
  .hero { padding: var(--space-6) 0 var(--space-6); }

  .nav-toggle { display: inline-flex; flex-direction: column; }

  .primary-nav {
    position: absolute;
    top: 100%;
    right: var(--space-3);
    flex-direction: column;
    align-items: stretch;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--r-md);
    box-shadow: var(--shadow-card-hover);
    padding: var(--space-3);
    min-width: 200px;
    display: none;
  }

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

  .primary-nav a:not(.btn) {
    padding: var(--space-2) 0;
  }

  .primary-nav a:not(.btn)::after { display: none; }

  .steps,
  .privacy__grid {
    grid-template-columns: 1fr;
  }

  .compare-row { grid-template-columns: 1fr; }

  .team-card dl {
    grid-template-columns: 1fr;
  }

  .team-card dt { margin-bottom: -2px; }

  .btn { width: 100%; }
  .hero__os-row { flex-direction: column; align-items: stretch; }
  .hero__os-row span { margin-bottom: var(--space-1); }
}