/* Ultra Reaction (ultrareaction.aircoded.app)
   Palette drawn from the app's Classic theme: deep teal ink, electric
   cyan accent, pale cyan titles. Display face: Blanch Caps (the app's
   own font, self-hosted). */

:root {
  --ink: #021a1f;
  --ink-2: #04222b;
  --raised: #06303c;
  --line: rgba(185, 240, 253, 0.1);
  --text: #dff5fc;
  --muted: #8fb7c4;
  --accent: #47dafc;
  --accent-dim: #2b93ad;
  --green: #01ebd3;
  --red: #ff5842;
  --display: "Blanch Caps", -apple-system, "SF Pro Display", sans-serif;
  --body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;
  --wide: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  background: var(--ink);
  color: var(--text);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--text); }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

section { padding: 96px 0; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(2.1rem, 4vw, 3rem); margin: 14px 0 12px; }
.section-head p { color: var(--muted); }

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

.nav {
  position: absolute;
  inset: 0 0 auto 0;
  z-index: 10;
  padding: 22px 0;
}
.nav .wrap { display: flex; align-items: center; gap: 28px; }
.wordmark {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--display);
  font-size: 1.55rem;
  color: var(--text); letter-spacing: 0.06em;
}
.wordmark img { width: 28px; height: 28px; border-radius: 7px; }
.nav-links { margin-left: auto; display: flex; gap: 26px; }
.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
}
.nav-links a:hover { color: var(--text); }

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

.hero {
  position: relative;
  padding: 170px 0 96px;
  overflow: hidden;
  background:
    radial-gradient(90% 60% at 50% -10%, rgba(71, 218, 252, 0.16), transparent 70%),
    var(--ink);
}
.hero .wrap { position: relative; z-index: 2; text-align: center; }
.hero h1 {
  font-size: clamp(3rem, 8vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: 0.03em;
  margin: 20px auto 22px;
  max-width: 16ch;
  color: #b9f0fd;
  text-shadow: 0 0 26px rgba(71, 218, 252, 0.35);
}
.hero .lede {
  color: var(--muted);
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  max-width: 56ch;
  margin: 0 auto 36px;
}
.hero .lede strong { color: var(--text); font-weight: 500; }

.cta-row {
  display: flex; align-items: center; justify-content: center;
  gap: 22px; flex-wrap: wrap;
  margin-bottom: 72px;
}
.badge-appstore {
  display: inline-flex; align-items: center; gap: 11px;
  padding: 13px 22px;
  border-radius: 999px;
  background: var(--text);
  color: var(--ink);
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.2;
  transition: transform 0.15s ease;
}
.badge-appstore:hover { color: var(--ink); transform: translateY(-1px); }
.badge-appstore svg { width: 19px; height: 19px; flex: none; }
.badge-appstore small {
  display: block; font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.04em; text-transform: uppercase; opacity: 0.6;
}
.cta-secondary { color: var(--text); font-size: 0.98rem; }
.cta-secondary span { color: var(--accent); }

.hero-shot { position: relative; z-index: 2; }
.hero-shot img {
  width: min(340px, 78%);
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 32px;
  box-shadow:
    0 0 0 6px rgba(6, 48, 60, 0.9),
    0 0 60px rgba(71, 218, 252, 0.18),
    0 40px 90px rgba(0, 0, 0, 0.55);
}
.hero-shot figcaption {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  padding: 20px 0 0;
}

/* -------------------------------------------------------------- modes */

.modes-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}
.modes-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.mode-card {
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.mode-card .body { padding: 20px 22px 18px; }
.mode-card h3 { font-size: 1.6rem; margin-bottom: 6px; }
.mode-card h3 .dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 3px;
  margin-right: 9px;
  vertical-align: 2px;
}
.mode-card p { color: var(--muted); font-size: 0.92rem; line-height: 1.5; }
.mode-card .levels {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent-dim);
  border-top: 1px solid var(--line);
  padding: 12px 22px;
  margin-top: auto;
}
.modes-shot img {
  width: min(320px, 88%);
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow:
    0 0 0 6px rgba(6, 48, 60, 0.9),
    0 30px 70px rgba(0, 0, 0, 0.5);
}

/* ------------------------------------------------------ split sections */

.split { background: var(--ink-2); }
.split .wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
.split.flip .wrap { grid-template-columns: 0.9fr 1.1fr; }
.split.flip .split-copy { order: 2; }
.split h2 { font-size: clamp(2.1rem, 4vw, 3rem); margin: 14px 0 12px; }
.split p { color: var(--muted); margin-bottom: 14px; }
.split p strong { color: var(--text); font-weight: 500; }
.split ul { list-style: none; margin-top: 18px; }
.split li {
  color: var(--muted);
  padding-left: 24px;
  position: relative;
  margin: 10px 0;
}
.split li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.55em;
  width: 9px; height: 9px;
  border-radius: 2px;
  background: var(--accent);
}
.split li.green::before { background: var(--green); }
.split li.red::before { background: var(--red); }
.split-shot img {
  width: min(320px, 88%);
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow:
    0 0 0 6px rgba(6, 48, 60, 0.9),
    0 30px 70px rgba(0, 0, 0, 0.5);
}

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

.privacy-strip { text-align: center; }
.privacy-strip h2 { font-size: clamp(2.2rem, 4.6vw, 3.2rem); margin: 14px 0 16px; }
.privacy-strip p { color: var(--muted); max-width: 52ch; margin: 0 auto 22px; }

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

footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 60px;
  color: var(--muted);
  font-size: 0.9rem;
}
footer .wrap {
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
}
footer .foot-links { margin-left: auto; display: flex; gap: 22px; }
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }

/* ------------------------------------------------------- inner pages */

.page { padding: 150px 0 90px; max-width: 720px; }
.page h1 { font-size: clamp(2.6rem, 5.6vw, 3.6rem); margin: 14px 0 10px; }
.page .updated { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); }
.page h2 { font-size: 1.7rem; margin: 42px 0 12px; }
.page p, .page li { color: var(--muted); }
.page p { margin: 14px 0; }
.page ul { margin: 14px 0 14px 22px; }
.page li { margin: 8px 0; }
.page strong { color: var(--text); font-weight: 600; }
.page .card {
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 24px;
  margin: 26px 0;
}
.page .card p { margin: 6px 0; }

/* --------------------------------------------------------- reveal anim */

/* hidden state only when JS is running (html.js), so content is never lost */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ------------------------------------------------------------- mobile */

@media (max-width: 900px) {
  section { padding: 72px 0; }
  .modes-layout { grid-template-columns: 1fr; gap: 40px; }
  .split .wrap, .split.flip .wrap { grid-template-columns: 1fr; gap: 40px; }
  .split.flip .split-copy { order: 0; }
}

@media (max-width: 600px) {
  .nav-links a:not(.nav-keep) { display: none; }
  .hero { padding-top: 130px; }
  .hero .lede { font-size: 1rem; }
  .cta-row { margin-bottom: 56px; }
  footer .wrap { flex-direction: column; align-items: flex-start; gap: 14px; }
  footer .foot-links { margin-left: 0; }
}