:root {
  --ink: #1d1d1f;
  --mute: #6e6e73;
  --line: #d2d2d7;
  --bg: #ffffff;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
}

* { -webkit-box-sizing: border-box; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.47;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}
figure { margin: 0; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.nav {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  max-width: 980px;
  margin: 0 auto;
  padding: calc(8px + var(--safe-t)) 20px 8px;
  min-height: 56px;
}
.brand {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 17px;
}
.brand img {
  width: 28px;
  height: 28px;
  -webkit-flex: none;
  flex: none;
  border-radius: 7px;
}
.nav-links {
  display: none;
  gap: 28px;
  color: var(--mute);
  font-size: 13px;
}
.nav-cta,
.btn {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 600;
  -webkit-appearance: none;
  appearance: none;
}
.nav-cta {
  min-height: 36px;
  padding: 0 14px;
  background: var(--ink);
  color: #fff;
  font-size: 13px;
}

.hero {
  text-align: center;
  padding: 36px 24px 0;
}
.hero h1 {
  margin: 0 auto;
  max-width: 9em;
  font-size: 34px;
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: 0;
}
.hero p {
  margin: 16px auto 0;
  max-width: 28em;
  color: var(--mute);
  font-size: 17px;
}
.hero-actions {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  flex-direction: column;
  -webkit-align-items: center;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
}
.hero-actions .btn { width: 260px; max-width: 100%; }
.btn {
  min-height: 44px;
  padding: 0 20px;
  font-size: 16px;
}
.btn-fill { background: var(--ink); color: #fff; }
.btn-ghost {
  color: var(--ink);
  border: 1px solid var(--ink);
  background: #fff;
}

/* Safari-safe phone: ratio comes from padding-top, never from svg/img height:auto */
.device {
  width: 232px;
  max-width: 68vw;
  margin: 40px auto 0;
  padding: 9px;
  background: #111;
  border-radius: 44px;
  -webkit-box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
}
.device-screen {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 35px;
  background: #1c1c1e;
}
.device-screen:before {
  content: "";
  display: block;
  padding-top: 217.272727%; /* 2868 / 1320, original iPhone screenshot */
}
.device-screen img {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  -o-object-fit: cover;
  object-fit: cover;
  -o-object-position: center center;
  object-position: center center;
}
.lock-reel img {
  opacity: 0;
  z-index: 0;
  -webkit-transition: opacity 0.9s ease-in-out;
  transition: opacity 0.9s ease-in-out;
}
.lock-reel img.is-on {
  opacity: 1;
  z-index: 1;
}
@media (prefers-reduced-motion: reduce) {
  .lock-reel img {
    -webkit-transition: none;
    transition: none;
  }
}
.device-screen:after {
  content: "";
  position: absolute;
  z-index: 2;
  top: 8px;
  left: 50%;
  width: 68px;
  height: 20px;
  margin-left: -34px;
  background: #0a0a0a;
  border-radius: 12px;
}
.lock-fab {
  position: absolute;
  z-index: 3;
  width: 12.6%;
  height: 0;
  padding-bottom: 12.6%;
  bottom: 5.6%;
  border-radius: 50%;
  background: rgba(40, 40, 42, 0.46);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  -webkit-box-shadow: inset 0 0 0 0.5px rgba(255, 255, 255, 0.22);
  box-shadow: inset 0 0 0 0.5px rgba(255, 255, 255, 0.22);
}
.lock-fab-light { left: 7.8%; }
.lock-fab-cam { right: 7.8%; }
.lock-fab svg {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 44%;
  height: 44%;
  margin-left: -22%;
  margin-top: -22%;
}

.gallery {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  flex-direction: column;
  -webkit-align-items: center;
  align-items: center;
  gap: 28px;
  padding: 56px 20px 0;
}
.gallery h2 {
  width: 100%;
  margin: 0 0 4px;
  font-size: 28px;
  text-align: center;
}
.gallery .intro {
  width: 100%;
  margin: 0 0 12px;
  text-align: center;
  color: var(--mute);
}

.howto {
  max-width: 560px;
  margin: 64px auto 0;
  padding: 0 24px;
}
.howto h2 {
  text-align: center;
  font-size: 28px;
  margin: 0 0 24px;
}
.howto ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.howto li {
  counter-increment: step;
  padding: 20px 0 20px 48px;
  border-top: 1px solid var(--line);
  position: relative;
}
.howto li:before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 20px;
  color: var(--mute);
  font-weight: 600;
  width: 28px;
}
.howto h3 { margin: 0 0 4px; font-size: 17px; }
.howto p { margin: 0; color: var(--mute); font-size: 15px; }

.legal-cta {
  text-align: center;
  padding: 48px 24px 0;
  color: var(--mute);
  font-size: 15px;
}
.legal-cta a { color: var(--ink); font-weight: 600; }

.site-footer {
  margin-top: 72px;
  background: #000;
  color: #fff;
  padding: 22px 24px calc(22px + var(--safe-b));
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: 12px 20px;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  -webkit-align-items: center;
  align-items: center;
  font-size: 13px;
}
.site-footer a { color: #fff; }

.doc {
  max-width: 680px;
  margin: 0 auto;
  padding: 24px 22px 80px;
}
.doc h1 {
  font-size: 36px;
  line-height: 1.15;
  margin: 8px 0 12px;
}
.doc .lede { color: var(--mute); margin: 0 0 32px; }
.doc section { padding: 24px 0; border-top: 1px solid var(--line); }
.doc h2 { font-size: 22px; margin: 0 0 10px; }
.doc p, .doc li { color: #424245; }
.doc ul { padding-left: 1.15rem; }
.doc a { color: #06c; }

.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none;
  min-height: 56px;
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  gap: 16px;
  font-weight: 600;
  cursor: pointer;
  padding: 16px 0;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:after {
  content: "";
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
  -webkit-flex: none;
  flex: none;
  margin-top: -4px;
}
.faq details[open] summary:after {
  -webkit-transform: rotate(225deg);
  transform: rotate(225deg);
  margin-top: 4px;
}
.faq details p { margin: 0 0 18px; color: var(--mute); }

.mail {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
}

@media (min-width: 720px) {
  .nav-links {
    display: -webkit-flex;
    display: flex;
  }
  .hero { padding-top: 56px; }
  .hero h1 { font-size: 48px; }
  .hero-actions {
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: center;
    justify-content: center;
  }
  .hero-actions .btn { width: auto; }
  .device { width: 248px; }
  .gallery {
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-justify-content: center;
    justify-content: center;
    max-width: 980px;
    margin: 56px auto 0;
  }
  .gallery h2,
  .gallery .intro { -webkit-flex-basis: 100%; flex-basis: 100%; }
}