/* -------------------------------------------------------------
 * Wombow landing page styles
 *
 * Design system mirrors the iOS app's Brand tokens:
 *   - accent     #8B5CF6 (light) / #AE8CFF (dark)
 *   - surface    .quaternary-style soft grey
 *   - font       system-ui rounded (matches SwiftUI design: .rounded)
 *   - 8pt grid   xs 4 / sm 8 / md 12 / lg 16 / xl 24 / xxl 32
 *
 * Single stylesheet, no preprocessors. Static hosting friendly
 * (GitHub Pages / Cloudflare Pages / Vercel — all work as-is).
 * ----------------------------------------------------------- */

:root {
  --accent:        #8B5CF6;
  --accent-soft:   rgba(139, 92, 246, 0.18);
  --accent-glow:   rgba(139, 92, 246, 0.08);
  --ink:           #1a1a1f;
  --ink-soft:      #4a4a55;
  --ink-faint:     #8a8a95;
  --surface:       #ffffff;
  --surface-low:   #f5f5f7;
  --surface-card:  #ffffff;
  --line:          rgba(0, 0, 0, 0.08);
  --radius-sm:      8px;
  --radius-md:     12px;
  --radius-lg:     16px;
  --radius-card:   20px;
  --maxw:          1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent:       #AE8CFF;
    --accent-soft:  rgba(174, 140, 255, 0.22);
    --accent-glow:  rgba(174, 140, 255, 0.10);
    --ink:          #f3f3f7;
    --ink-soft:     #b8b8c4;
    --ink-faint:    #7a7a85;
    --surface:      #0c0c10;
    --surface-low:  #1a1a22;
    --surface-card: #15151c;
    --line:         rgba(255, 255, 255, 0.08);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--surface);
  color: var(--ink);
  font-family:
    -apple-system, BlinkMacSystemFont,
    "SF Pro Rounded", "SF Pro Display", "Inter",
    system-ui, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.15s ease;
}
a:hover { opacity: 0.7; }

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

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* -------------------------------------------------------------
 * Nav
 * ----------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.brand img { border-radius: 6px; }

.nav nav {
  display: flex;
  gap: 28px;
  font-size: 15px;
  color: var(--ink-soft);
}

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

main { display: block; }

section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 96px 32px;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: center;
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 64px;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 24px;
}

.lede {
  font-size: 19px;
  color: var(--ink-soft);
  margin: 0 0 12px;
  max-width: 32em;
}
.lede-sub {
  font-size: 15px;
  color: var(--ink-faint);
  margin: 0 0 28px;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.12s ease;
}
.btn:hover { transform: translateY(-1px); opacity: 1; }
.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.hero-art {
  display: flex;
  justify-content: center;
}
.hero-art img {
  filter: drop-shadow(0 18px 40px var(--accent-glow));
  max-width: 100%;
  width: 100%;
  max-height: 520px;
  object-fit: contain;
}

/* -------------------------------------------------------------
 * Section heading utilities
 * ----------------------------------------------------------- */

section h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  letter-spacing: -0.015em;
  font-weight: 800;
  margin: 0 0 14px;
}

.section-lede {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 36em;
  margin: 0 0 40px;
}

/* -------------------------------------------------------------
 * Companions
 * ----------------------------------------------------------- */

.companions { padding-top: 32px; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--accent-soft);
  display: grid;
  place-items: center;
  font-size: 24px;
}

.card h3 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.01em;
}
.card p {
  margin: 0;
  color: var(--ink-soft);
}
.card-quote {
  margin-top: auto;
  padding: 14px 16px;
  background: var(--surface-low);
  border-radius: var(--radius-md);
  color: var(--ink-soft);
  font-style: italic;
  font-size: 15px;
}

/* -------------------------------------------------------------
 * Keeps — async / persistent feature grid
 * Notebook+Highlights / Daily recap / Wrapped / Watch Party.
 * Two columns on desktop; rows of (mascot | text) inside each card.
 * Stacks vertically on mobile via the existing 820px breakpoint.
 * ------------------------------------------------------------- */

.keeps { padding-top: 24px; }

.keeps-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.keep {
  background: var(--surface-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 22px;
  align-items: center;
}

.keep-mascot {
  width: 140px;
  height: 140px;
  object-fit: contain;
  /* The transparent PNGs lose contrast against `--surface-card` on
   * very light themes; a tiny tinted backdrop keeps them readable. */
  background: var(--accent-soft);
  border-radius: 20px;
  padding: 6px;
}

.keep h3 {
  margin: 0 0 8px 0;
  font-size: 20px;
  letter-spacing: -0.01em;
}
.keep p {
  margin: 0;
  color: var(--ink-soft);
}

/* -------------------------------------------------------------
 * Calm tech
 * ----------------------------------------------------------- */

.calm {
  background: linear-gradient(180deg, var(--surface), var(--accent-glow));
  border-radius: var(--radius-card);
  margin: 0 32px;
  max-width: calc(var(--maxw) - 64px);
  margin-left: auto;
  margin-right: auto;
  padding: 80px 56px;
}

.manifesto {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  font-size: 22px;
  line-height: 1.7;
  letter-spacing: -0.01em;
}
.manifesto li { padding: 4px 0; }

.calm-note {
  color: var(--ink-soft);
  font-size: 16px;
  max-width: 32em;
  margin: 0;
}

/* -------------------------------------------------------------
 * How / Accessibility
 * ----------------------------------------------------------- */

.how-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px 48px;
}
.how-grid h3 {
  margin: 0 0 6px;
  font-size: 18px;
}
.how-grid p {
  margin: 0;
  color: var(--ink-soft);
}

.ax-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 17px;
}
.ax-list li {
  padding: 12px 0;
  border-top: 1px solid var(--line);
}
.ax-list li:first-child { border-top: 0; }
.ax-list strong { color: var(--ink); margin-right: 8px; }

/* -------------------------------------------------------------
 * Waitlist
 * ----------------------------------------------------------- */

.waitlist {
  text-align: center;
  padding-top: 64px;
  padding-bottom: 64px;
}
.waitlist h2 {
  font-size: clamp(28px, 3.6vw, 40px);
}
.waitlist p {
  color: var(--ink-soft);
  max-width: 30em;
  margin: 0 auto 24px;
}

.waitlist-form {
  display: flex;
  justify-content: center;
  gap: 8px;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
}
.waitlist-form input {
  flex: 1 1 240px;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-low);
  color: var(--ink);
  font-size: 15px;
  font-family: inherit;
}
.waitlist-form input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.waitlist-form button {
  padding: 14px 22px;
  border-radius: 999px;
  border: 0;
  background: var(--accent);
  color: white;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
.waitlist-thanks {
  flex-basis: 100%;
  color: var(--accent);
  margin: 12px 0 0;
}

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

.footer {
  border-top: 1px solid var(--line);
  background: var(--surface-low);
  padding: 64px 32px 32px;
  margin-top: 64px;
}
.footer-cols {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
}
.brand-footer { margin: 0 0 8px; }
.muted { color: var(--ink-faint); font-size: 14px; margin: 0; }

.footer h4 {
  margin: 0 0 10px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}
.footer a {
  display: block;
  padding: 4px 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.copy {
  max-width: var(--maxw);
  margin: 48px auto 0;
  font-size: 13px;
  color: var(--ink-faint);
}

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

@media (max-width: 820px) {
  section { padding: 64px 24px; }
  .hero {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 48px;
  }
  .hero-art img { max-height: 360px; }
  .cards { grid-template-columns: 1fr; }
  .keeps-grid { grid-template-columns: 1fr; }
  .keep {
    grid-template-columns: 96px 1fr;
    gap: 16px;
    padding: 24px 20px;
  }
  .keep-mascot { width: 96px; height: 96px; }
  .how-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .calm { padding: 56px 28px; margin: 0 16px; }
  .nav { padding: 12px 20px; }
  .nav nav { gap: 18px; font-size: 14px; }
}

@media (max-width: 480px) {
  .nav nav a:nth-child(2) { display: none; }
  .footer-cols { grid-template-columns: 1fr; }
}