:root {
  --bg: #070b14;
  --bg-elev: #10182a;
  --card: #141c2e;
  --card-2: #1b2740;
  --line: #31415f;
  --text: #f4f7fb;
  --muted: #d5deee;
  --accent: #c5d8ff;
  --accent-strong: #8eb4ff;
  --mark: #d7ccff;
  --focus: #ffffff;
  --ok: #b7f0d4;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --max: 72rem;
  --prose: 44rem;
  --radius: 1.25rem;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(142, 180, 255, 0.16), transparent 55%),
    radial-gradient(900px 420px at -10% 20%, rgba(167, 139, 250, 0.12), transparent 50%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover { color: var(--text); }

:focus { outline: none; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: 0.5rem;
  transform: translateY(-150%);
  background: var(--text);
  color: var(--bg);
  padding: 0.6rem 0.9rem;
  z-index: 10;
  border-radius: 0.5rem;
  font-weight: 700;
}

.skip:focus { transform: none; }

.wrap {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
  min-height: 44px;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.primary { display: none; }

.nav summary {
  list-style: none;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.9rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: var(--bg-elev);
}

.nav summary::-webkit-details-marker { display: none; }

.nav summary::after {
  content: "";
  width: 0.7rem;
  height: 0.45rem;
  margin-left: 0.55rem;
  background: currentColor;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
}

.nav[open] summary::after { transform: scaleY(-1); }

.nav:not([open]) > nav { display: none; }

.nav nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.6rem;
  padding: 0.6rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 1rem;
  position: absolute;
  right: 0;
  top: 100%;
  z-index: 5;
  min-width: 14rem;
  box-shadow: var(--shadow);
}

.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.7rem 0.8rem;
  border-radius: 0.7rem;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav a:hover,
.nav a[aria-current="page"] { background: var(--card-2); }

.hero {
  display: grid;
  gap: 2rem;
  padding: 1.5rem 0 3rem;
}

.kicker,
.section-kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mark);
  margin: 0 0 0.8rem;
}

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.03em; }

h1 {
  font-family: var(--serif);
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  font-weight: 650;
  margin: 0 0 1rem;
}

.hero h1 { font-size: clamp(2.7rem, 7vw, 4.8rem); }

h2 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 0.8rem;
}

h3 { margin: 0 0 0.45rem; font-size: 1.25rem; }

.lede, .section-intro {
  color: var(--muted);
  font-size: 1.15rem;
  max-width: 40rem;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 1.4rem 0 0.6rem;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(20, 28, 46, 0.8);
  font-weight: 700;
}

.status::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(183, 240, 212, 0.15);
}

.fine {
  color: var(--muted);
  margin: 0;
  max-width: 38rem;
}

.frame-diagram {
  margin: 0;
  justify-self: center;
}

.phone {
  position: relative;
  width: min(280px, 78vw);
  aspect-ratio: 9 / 16;
  border-radius: 1.6rem;
  background: linear-gradient(180deg, #1a2744, #0c1322);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.phone::before,
.phone::after {
  content: "";
  position: absolute;
  width: 1.4rem;
  height: 1.4rem;
  border: 2px solid #fff;
  z-index: 2;
}

.phone::before { top: 0.8rem; left: 0.8rem; border-right: 0; border-bottom: 0; }
.phone::after { right: 0.8rem; bottom: 0.8rem; border-left: 0; border-top: 0; }

.zone {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(142, 180, 255, 0.16);
}

.zone-top { top: 0; left: 0; right: 0; height: 11%; }
.zone-rail { top: 38%; right: 0; width: 16%; bottom: 18%; writing-mode: vertical-rl; }
.zone-caption { left: 0; right: 16%; bottom: 0; height: 18%; }
.safe {
  position: absolute;
  top: 12%;
  left: 5%;
  right: 18%;
  bottom: 20%;
  border: 1.5px dashed var(--accent-strong);
  border-radius: 0.8rem;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 0.8rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

figcaption {
  color: var(--muted);
  font-size: 0.92rem;
  max-width: 22rem;
  margin: 0.9rem auto 0;
  text-align: center;
}

.section { padding: 3.5rem 0; }

.section-intro { margin-bottom: 1.6rem; }

.feature-grid,
.steps,
.split {
  display: grid;
  gap: 1rem;
}

.card,
.step {
  background: rgba(20, 28, 46, 0.88);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem 1.35rem;
}

.card p,
.step p,
.prose p { color: var(--muted); }

.card p:last-child,
.step p:last-child { margin-bottom: 0; }

.tag {
  display: inline-block;
  margin: 0 0 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
}

.tag-pro { border-color: #6d5cae; color: var(--mark); }
p .tag { margin: 0 0.2rem; vertical-align: 0.05em; }

.step-num {
  font-family: var(--mono);
  color: var(--accent-strong);
  margin: 0 0 0.4rem;
}

ul.clean, .prose ul { padding-left: 1.15rem; }
ul.clean li, .prose li { margin: 0.35rem 0; color: var(--muted); }
ul.clean strong, .prose strong { color: var(--text); }

.faq details {
  border-top: 1px solid var(--line);
  padding: 0.35rem 0;
}

.faq details:last-child { border-bottom: 1px solid var(--line); }

.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 0.85rem 0;
  min-height: 44px;
}

.faq summary:hover { color: var(--accent); }

.faq details p { margin-top: 0; }

.note {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--muted);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin-top: 0.8rem;
}

.site-footer a { min-height: 44px; display: inline-flex; align-items: center; }

code {
  font-family: var(--mono);
  font-size: 0.86em;
  word-break: break-word;
}

.prose { max-width: var(--prose); }
.prose h2 { font-size: 1.55rem; margin-top: 2rem; }
.prose h3 { font-size: 1.15rem; margin-top: 1.4rem; }

@media (min-width: 860px) {
  .nav { display: none; }
  .primary {
    display: flex;
    align-items: center;
    margin-left: auto;
    gap: 0.15rem;
  }
  .primary a {
    color: var(--text);
    text-decoration: none;
    padding: 0.4rem 0.55rem;
    border-radius: 0.7rem;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .primary a:hover,
  .primary a[aria-current="page"] { background: var(--card-2); }
  .hero {
    grid-template-columns: 1.3fr 0.7fr;
    align-items: center;
    padding-top: 2.5rem;
  }
  figcaption { text-align: left; margin-left: 0; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .card-wide { grid-column: 1 / -1; }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .split { grid-template-columns: 1fr 1fr; }
}

.split { margin-top: 1rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}