/* TempoTwist website. One stylesheet, no web fonts, no JavaScript.
   Brand tokens come from the App Store screenshot system
   (design/from-claude-design in the app repo). */

:root {
  color-scheme: dark light;
  --bg: #0A0A0E;
  --bg-raised: #17161D;
  --line: #2E2C38;
  --text: #F2F0FF;
  --text-2: #9A94B8;
  --accent-text: #B7A5FF;
  --accent-fill: #5B3DF0;
  --accent-fill-hover: #6B4DFF;
  --brand-purple: #7C5CFF;
  --brand-dot: #F5A94B;
  --glow: rgba(124, 92, 255, 0.28);
  --radius: 18px;
  --gutter: 20px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #FBFAFF;
    --bg-raised: #F1EFF8;
    --line: #E1DDEE;
    --text: #17161D;
    --text-2: #5A5670;
    --accent-text: #5B3DF0;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent-text); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--brand-purple);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -100px;
  padding: 10px 14px;
  background: var(--accent-fill);
  color: #fff;
  border-radius: 10px;
  z-index: 10;
}
.skip-link:focus { top: 12px; }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 var(--gutter); }
.wrap-narrow { max-width: 720px; }

/* Header */

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.brand img { width: 32px; height: 32px; border-radius: 22.4%; }
.brand .twist { color: var(--brand-purple); }

.site-nav ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.site-nav a {
  display: inline-block;
  padding: 10px 12px;
  color: var(--text-2);
  text-decoration: none;
  font-weight: 500;
  border-radius: 10px;
}
.site-nav a:hover { color: var(--text); background: var(--bg-raised); }
.site-nav a[aria-current="page"] { color: var(--text); }

/* Landing: the dark stage keeps the brand look in both colour schemes */

.stage {
  color-scheme: dark;
  --text: #F2F0FF;
  --text-2: #9A94B8;
  --accent-text: #B7A5FF;
  background:
    radial-gradient(60% 50% at 50% 78%, var(--glow), rgba(124, 92, 255, 0)),
    #0A0A0E;
  color: var(--text);
  padding: 40px 0 48px;
  overflow: hidden;
}
@media (prefers-color-scheme: light) {
  .stage { margin: 0 12px; border-radius: 28px; }
}

.hero { text-align: center; }

.hero h1 {
  margin: 0 auto;
  font-size: clamp(2.4rem, 6.5vw + 0.9rem, 5rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
}
.hero h1 .line { display: block; }
.hero h1 .accent { color: var(--brand-purple); }
.hero h1, .hero .lede, .availability-note { text-wrap: balance; }

.hero .lede {
  margin: 20px auto 0;
  max-width: 36rem;
  font-size: clamp(1.0625rem, 0.6vw + 0.95rem, 1.25rem);
  color: var(--text-2);
}

.availability {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  padding: 12px 20px;
  border: 1px solid #2E2C38;
  border-radius: 999px;
  background: #17161D;
  font-weight: 600;
}
.availability .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--brand-dot);
}
.availability-note { margin: 12px 0 0; color: var(--text-2); font-size: 0.9375rem; }

.gallery {
  list-style: none;
  margin: 44px 0 0;
  padding: 4px var(--gutter) 12px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: min(68vw, 260px);
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding: 0 var(--gutter);
  scrollbar-width: none;
}
.gallery::-webkit-scrollbar { display: none; }
.gallery li { scroll-snap-align: start; }
.gallery img {
  width: 100%;
  border-radius: 22px;
  border: 1px solid #2E2C38;
}

@media (min-width: 900px) {
  .gallery {
    max-width: 1080px;
    margin-left: auto;
    margin-right: auto;
    grid-auto-flow: row;
    grid-template-columns: repeat(4, 1fr);
    overflow: visible;
  }
}

/* Landing: benefits */

.benefits { padding: 64px 0 24px; }
.benefits h2,
.section-title {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 2vw + 1rem, 2.25rem);
  letter-spacing: -0.025em;
  line-height: 1.15;
}
.benefit-grid {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
@media (min-width: 720px) { .benefit-grid { grid-template-columns: repeat(2, 1fr); } }
.benefit-grid li {
  padding: 22px 22px 20px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.benefit-grid h3 { margin: 0 0 6px; font-size: 1.125rem; letter-spacing: -0.01em; }
.benefit-grid p { margin: 0; color: var(--text-2); }

.help-strip { padding: 40px 0 8px; }
.help-strip p { margin: 0; color: var(--text-2); }

/* Reading pages (Support, Privacy) */

.page { padding: 24px 0 40px; }
.page h1 {
  margin: 16px 0 4px;
  font-size: clamp(2rem, 3vw + 1rem, 2.75rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.page .subtitle { margin: 0; color: var(--text-2); font-size: 1.125rem; }
.page .updated { margin: 8px 0 0; color: var(--text-2); font-size: 0.9375rem; }
.page h2 {
  margin: 48px 0 12px;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.page h3 { margin: 28px 0 6px; font-size: 1.0625rem; letter-spacing: -0.005em; }
.page h3 + p { margin-top: 0; }
.page p, .page li { max-width: 68ch; }
.page ul { padding-left: 1.25em; }
.page li + li { margin-top: 6px; }
.page .lead-strong { font-size: 1.1875rem; }

.contact-card {
  margin-top: 28px;
  padding: 24px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.contact-card h2 { margin-top: 0; }
.contact-card p { margin: 0 0 14px; }
.contact-card .hint { margin: 14px 0 0; color: var(--text-2); font-size: 0.9375rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 14px;
  background: var(--accent-fill);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  overflow-wrap: anywhere;
}
.button:hover { background: var(--accent-fill-hover); }

.toc {
  margin-top: 28px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.toc h2 { margin: 0 0 6px; font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-2); }
.toc ul { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 0 18px; }
.page .toc li + li { margin-top: 0; }
.toc a { display: inline-block; padding: 6px 0; }

.methods { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 12px; }
@media (min-width: 640px) { .methods { grid-template-columns: repeat(2, 1fr); } }
.methods li {
  margin: 0;
  padding: 16px 18px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 14px;
  max-width: none;
}
.methods strong { display: block; margin-bottom: 2px; }
.methods span { color: var(--text-2); }

.split { display: grid; gap: 16px; margin-top: 16px; }
@media (min-width: 640px) { .split { grid-template-columns: 1fr 1fr; } }
.split > div {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.split h3 { margin-top: 0; }
.split ul { margin: 0; }

/* Footer */

.site-footer {
  margin-top: 56px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--text-2);
  font-size: 0.9375rem;
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; }
.site-footer ul { display: flex; flex-wrap: wrap; gap: 6px 20px; list-style: none; margin: 0; padding: 0; }
.site-footer a { color: var(--text-2); }
.site-footer a:hover { color: var(--text); }
.site-footer p { margin: 0; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}