/* Octave — getoctave.app. Matches the app: deep dark surface, phase colours. */
:root {
  color-scheme: dark;
  --bg: #0f1117;
  --bg-2: #161925;
  --panel: #1b1e2b;
  --panel-2: #23273a;
  --line: rgba(255, 255, 255, 0.08);
  --ink: #f4f5fb;
  --muted: #a9adc4;
  --primary: #b9c3ff;
  --primary-ink: #1b2266;
  --coral: #ff6a55;
  --pink: #ff3d7f;
  --violet: #9b6bff;
  --blue: #4ea8ff;
  --teal: #2ec4b6;
  --amber: #ffb547;
  --radius: 22px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(40rem 30rem at 12% -6%, rgba(255, 90, 95, 0.18), transparent 70%),
    radial-gradient(36rem 30rem at 92% 8%, rgba(155, 107, 255, 0.16), transparent 70%),
    radial-gradient(40rem 34rem at 50% 110%, rgba(46, 196, 182, 0.10), transparent 70%),
    linear-gradient(180deg, #121423 0%, var(--bg) 60%);
}

a { color: var(--primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #fff; }
img { max-width: 100%; display: block; }

.wrap { width: min(var(--max), 100% - 40px); margin-inline: auto; }

/* Skip link for keyboard users */
.skip {
  position: absolute; left: -9999px; top: 8px;
  background: var(--primary); color: var(--primary-ink);
  padding: 8px 14px; border-radius: 10px; font-weight: 700; z-index: 10;
}
.skip:focus { left: 12px; }

:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; border-radius: 8px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 5; backdrop-filter: blur(14px);
  background: rgba(15, 17, 23, 0.72); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink);
  text-decoration: none; font-weight: 800; font-size: 20px; letter-spacing: -0.02em; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.nav { display: flex; gap: 22px; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }

/* Hero */
.hero { padding: 72px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px;
  border: 1px solid var(--line); border-radius: 999px; color: var(--muted);
  font-size: 14px; font-weight: 600; background: rgba(255, 255, 255, 0.03); }
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 106, 85, 0.18); }
h1 { font-size: clamp(40px, 6vw, 68px); line-height: 1.04; letter-spacing: -0.035em;
  margin: 18px 0 18px; font-weight: 800; }
.grad { background: linear-gradient(90deg, var(--coral), var(--pink) 35%, var(--violet) 65%, var(--teal));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { font-size: clamp(18px, 2.2vw, 21px); color: var(--muted); max-width: 34em; margin: 0 0 28px; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.store {
  display: inline-flex; align-items: center; gap: 12px; min-height: 56px;
  padding: 10px 20px; border-radius: 14px; text-decoration: none; color: var(--ink);
  background: var(--panel-2); border: 1px solid var(--line); font-weight: 700;
}
.store small { display: block; font-size: 12px; font-weight: 600; color: var(--muted); line-height: 1.2; }
.store span { line-height: 1.2; }
.store svg { width: 24px; height: 24px; flex: none; }
.store:hover { background: #2b3047; color: var(--ink); }
.store[aria-disabled="true"] { cursor: default; opacity: 0.85; }
.store[aria-disabled="true"]:hover { background: var(--panel-2); }
.note { color: var(--muted); font-size: 14px; margin-top: 14px; }

/* Phone frames */
.phone { position: relative; width: min(300px, 78vw); aspect-ratio: 1179 / 2556;
  border-radius: 46px; padding: 10px; background: linear-gradient(160deg, #2a2e42, #0c0e15);
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.08) inset; }
.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 37px; }
.hero-art { display: flex; justify-content: center; position: relative; }
.hero-art::before { content: ""; position: absolute; inset: 10% 5%;
  background: radial-gradient(closest-side, rgba(255, 90, 95, 0.35), transparent);
  filter: blur(30px); z-index: -1; }

/* Sections */
section { padding: 64px 0; }
h2 { font-size: clamp(30px, 4vw, 44px); letter-spacing: -0.03em; line-height: 1.1; margin: 0 0 14px; }
.section-lede { color: var(--muted); max-width: 40em; margin: 0 0 36px; font-size: 18px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: linear-gradient(180deg, var(--panel), var(--bg-2)); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px; }
.card h3 { margin: 14px 0 6px; font-size: 20px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; }
.icon svg { width: 24px; height: 24px; }
.i-coral { background: rgba(255, 106, 85, 0.16); color: var(--coral); }
.i-teal { background: rgba(46, 196, 182, 0.16); color: var(--teal); }
.i-violet { background: rgba(155, 107, 255, 0.18); color: var(--violet); }
.i-blue { background: rgba(78, 168, 255, 0.16); color: var(--blue); }
.i-amber { background: rgba(255, 181, 71, 0.16); color: var(--amber); }
.i-pink { background: rgba(255, 61, 127, 0.16); color: var(--pink); }

/* Screenshot strip */
.shots { display: flex; gap: 28px; overflow-x: auto; padding: 8px 4px 28px;
  scroll-snap-type: x mandatory; scrollbar-width: thin; }
.shots figure { margin: 0; flex: none; scroll-snap-align: center; }
.shots .phone { width: 250px; }
.shots figcaption { text-align: center; color: var(--muted); font-size: 14px; margin-top: 14px; }

/* Phases legend */
.phases { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line); font-size: 14px; color: var(--muted); }
.chip i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checks li { display: flex; gap: 12px; color: var(--muted); }
.checks li::before { content: ""; flex: none; width: 22px; height: 22px; margin-top: 2px; border-radius: 50%;
  background: rgba(46, 196, 182, 0.18) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232ec4b6' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center / 14px no-repeat; }
.checks strong { color: var(--ink); }

.banner { text-align: center; padding: 56px 28px; border-radius: 28px; border: 1px solid var(--line);
  background:
    radial-gradient(30rem 16rem at 20% 0%, rgba(255, 90, 95, 0.22), transparent 70%),
    radial-gradient(30rem 16rem at 80% 100%, rgba(155, 107, 255, 0.22), transparent 70%),
    var(--panel); }
.banner img { width: 88px; height: 88px; border-radius: 22px; margin: 0 auto 18px; }
.banner .cta { justify-content: center; margin-top: 24px; }

/* Long-form pages */
.page { padding: 56px 0 72px; }
.prose { max-width: 760px; }
.prose h1 { font-size: clamp(34px, 5vw, 48px); margin-top: 0; }
.prose h2 { font-size: 24px; margin: 36px 0 8px; letter-spacing: -0.01em; }
.prose p, .prose li { color: #d3d6e6; }
.prose .meta { color: var(--muted); }
.faq details { border: 1px solid var(--line); border-radius: 16px; background: var(--panel);
  padding: 16px 20px; margin: 12px 0; }
.faq summary { cursor: pointer; font-weight: 700; list-style: none; display: flex;
  justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 10px 0 0; color: var(--muted); }
.contact { margin-top: 32px; padding: 22px 24px; border-radius: 18px; background: var(--panel-2);
  border: 1px solid var(--line); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 28px; justify-content: space-between; align-items: center; }
.site-footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--ink); }

.center { text-align: center; }

@media (max-width: 900px) {
  .hero { padding-top: 48px; }
  .hero .wrap, .split { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .hero .phone { width: min(250px, 66vw); }
  .features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .features { grid-template-columns: 1fr; }
  .nav { gap: 16px; }
  .nav .hide-sm { display: none; }
  section { padding: 48px 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}