:root {
  --ink: #172033;
  --muted: #667085;
  --line: #e5eaf0;
  --paper: #ffffff;
  --wash: #f5f8fc;
  --blue: #2764e7;
  --blue-dark: #1749b6;
  --blue-soft: #eaf1ff;
  --green: #17875d;
  --green-soft: #e8f7f0;
  --warning: #9a5b05;
  --warning-soft: #fff6df;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: #f8fafc;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: linear-gradient(180deg, #f8fafc 0, #fff 36rem); }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.site-header {
  position: sticky; top: 0; z-index: 20; min-height: 74px; padding: 12px max(20px, env(safe-area-inset-left));
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  background: rgba(255,255,255,.9); border-bottom: 1px solid rgba(229,234,240,.86); backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; min-width: 0; }
.brand img { width: auto; height: 38px; max-width: 210px; object-fit: contain; }
.header-actions, .language-switch { display: flex; align-items: center; gap: 8px; }
.language-switch { padding: 4px; border-radius: 13px; background: #eef2f7; }
.language-switch button {
  min-width: 44px; height: 38px; padding: 0 10px; border: 0; border-radius: 10px; background: transparent;
  color: var(--muted); font-weight: 700; cursor: pointer;
}
.language-switch button.active { color: #fff; background: var(--ink); box-shadow: 0 5px 14px rgba(23,32,51,.18); }
.back-link { min-height: 44px; display: inline-flex; align-items: center; gap: 7px; padding: 0 12px; border-radius: 11px; color: #475467; font-size: .9rem; text-decoration: none; }
.back-link:hover { background: #f1f5f9; color: var(--ink); }
main { overflow: hidden; }
.hero { max-width: 1180px; margin: 0 auto; min-height: 640px; padding: 70px 28px 80px; display: grid; grid-template-columns: minmax(0,1.1fr) minmax(330px,.9fr); align-items: center; gap: 76px; }
.eyebrow { display: inline-flex; color: var(--blue); font-size: .75rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1 { max-width: 720px; margin: 14px 0 20px; font-size: clamp(2.55rem, 5.7vw, 5.15rem); line-height: .98; letter-spacing: -.055em; font-weight: 750; }
.hero-lead { max-width: 650px; margin: 0; color: #526077; font-size: clamp(1.05rem, 2vw, 1.25rem); line-height: 1.7; }
.trust-note { max-width: 620px; margin: 28px 0 26px; padding: 16px 18px; display: flex; gap: 13px; align-items: flex-start; border: 1px solid #cfe8dc; border-radius: 16px; background: var(--green-soft); }
.trust-note .trust-icon { width: 25px; height: 25px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: #fff; }
.trust-icon svg { width: 15px; height: 15px; display: block; fill: none; stroke: currentColor; stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.trust-note strong, .trust-note span { display: block; }
.trust-note strong { color: #126b4a; font-size: .92rem; }
.trust-note div span { margin-top: 3px; color: #3a6b5a; font-size: .86rem; line-height: 1.45; }
.download-row { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }
.download-button {
  min-height: 62px; min-width: 250px; display: inline-flex; align-items: center; gap: 13px; padding: 10px 22px;
  border-radius: 16px; color: #fff; background: linear-gradient(135deg, var(--blue), #3f78ee); text-decoration: none;
  box-shadow: 0 16px 28px -14px rgba(39,100,231,.65); transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
}
.download-button:not(.is-disabled):hover { transform: translateY(-2px); box-shadow: 0 20px 34px -14px rgba(39,100,231,.7); }
.download-button strong, .download-button small { display: block; }
.download-button strong { font-size: .98rem; }
.download-button small { margin-top: 2px; color: #dbe8ff; font-size: .73rem; }
.download-icon { font-size: 1.7rem; line-height: 1; }
.download-button.is-checking, .download-button.is-disabled { background: #a8b2c2; box-shadow: none; cursor: not-allowed; }
.download-status { margin: 0; max-width: 250px; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.download-status.error { color: #b54708; }
.meta-list { display: flex; flex-wrap: wrap; gap: 9px 18px; margin: 20px 0 0; padding: 0; color: var(--muted); list-style: none; font-size: .78rem; }
.meta-list li { display: flex; align-items: center; gap: 7px; }
.meta-list li span:first-child { color: #98a2b3; font-size: .42rem; }
.hero-device { position: relative; min-height: 470px; display: grid; place-items: center; }
.device-shell { position: relative; z-index: 2; width: 286px; height: 568px; padding: 13px; border: 8px solid #182033; border-radius: 43px; background: #fff; box-shadow: 0 35px 80px -28px rgba(24,32,51,.5); transform: rotate(2.4deg); }
.device-shell::before { content: ""; position: absolute; top: 7px; left: 50%; width: 80px; height: 21px; border-radius: 15px; background: #182033; transform: translateX(-50%); }
.device-status { height: 34px; display: flex; align-items: center; justify-content: space-between; padding: 0 10px; color: #586174; font-size: .68rem; }
.device-screen { height: calc(100% - 34px); padding: 76px 26px 26px; display: flex; flex-direction: column; align-items: center; text-align: center; border-radius: 26px; background: radial-gradient(circle at 50% 15%, #eef4ff, #fff 44%); }
.app-mark { width: 76px; height: 76px; display: grid; place-items: center; border-radius: 24px; background: linear-gradient(145deg, #2c6bed, #1a48ad); color: #fff; font-family: Georgia, serif; font-size: 2.45rem; font-weight: 700; box-shadow: 0 15px 25px -12px rgba(39,100,231,.65); }
.app-mark.small { width: 54px; height: 54px; border-radius: 17px; font-size: 1.8rem; }
.device-overline { margin: 24px 0 5px; color: var(--blue); font-size: .66rem; font-weight: 800; letter-spacing: .18em; }
.device-screen h2 { margin: 5px 0 8px; font-size: 1.45rem; letter-spacing: -.025em; }
.device-screen p { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.55; }
.device-button { width: 100%; margin-top: auto; padding: 13px 15px; border-radius: 14px; background: var(--blue); color: #fff; font-size: .83rem; font-weight: 700; }
.device-glow { position: absolute; width: 430px; height: 430px; border-radius: 50%; background: radial-gradient(circle, rgba(89,138,241,.22), rgba(89,138,241,0) 68%); }
.guide-section { padding: 96px 28px 110px; background: var(--wash); border-top: 1px solid var(--line); }
.section-heading { max-width: 760px; margin: 0 auto 48px; text-align: center; }
.section-heading h2 { margin: 10px 0 14px; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.08; letter-spacing: -.04em; }
.section-heading p { margin: 0; color: var(--muted); line-height: 1.65; }
.steps { max-width: 1120px; margin: 0 auto; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px; }
.step-card { min-width: 0; padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: 0 16px 40px -34px rgba(23,32,51,.38); }
.step-copy { min-height: 112px; display: flex; gap: 16px; }
.step-number { width: 36px; height: 36px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 12px; color: var(--blue); background: var(--blue-soft); font-size: .86rem; font-weight: 800; }
.step-copy h3 { margin: 2px 0 8px; font-size: 1.12rem; }
.step-copy p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.6; }
.android-shot { max-width: 390px; margin: 22px auto 0; overflow: hidden; border: 8px solid #273043; border-radius: 30px; background: #fff; box-shadow: 0 18px 32px -22px rgba(23,32,51,.55); }
.shot-top { min-height: 44px; padding: 0 17px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid #edf0f4; color: #344054; font-size: .76rem; font-weight: 650; }
.shot-body { min-height: 265px; padding: 27px 24px; }
.center-shot { display: flex; flex-direction: column; align-items: center; text-align: center; }
.file-icon { width: 58px; height: 65px; display: grid; place-items: center; border-radius: 8px 8px 15px 8px; background: #eaf1ff; color: var(--blue); font-size: .72rem; font-weight: 850; }
.shot-body h4 { margin: 18px 0 7px; font-size: 1.02rem; }
.shot-body p { margin: 0 0 19px; color: #667085; font-size: .76rem; line-height: 1.45; }
.shot-primary, .shot-secondary { width: 100%; min-height: 39px; display: grid; place-items: center; border-radius: 10px; font-size: .74rem; font-weight: 700; }
.shot-primary { margin-top: auto; background: #2d6cdf; color: #fff; }
.shot-secondary { margin-top: 7px; color: #3b5fa8; background: #f1f5fb; }
.shield-icon { width: 62px; height: 70px; display: grid; place-items: center; clip-path: polygon(50% 0, 92% 17%, 84% 72%, 50% 100%, 16% 72%, 8% 17%); background: #2f70e8; color: #fff; font-size: 1.35rem; font-weight: 800; }
.setting-caption { margin-top: 0 !important; color: #344054 !important; font-weight: 700; }
.setting-row { display: grid; grid-template-columns: 38px minmax(0,1fr) auto; align-items: center; gap: 12px; padding: 17px 0; border-top: 1px solid #edf0f4; border-bottom: 1px solid #edf0f4; }
.setting-row strong, .setting-row small { display: block; }
.setting-row strong { font-size: .82rem; }
.setting-row small { margin-top: 3px; color: #858c99; font-size: .65rem; }
.chrome-dot { width: 34px; height: 34px; border-radius: 50%; background: conic-gradient(#e94335 0 33%, #f7c844 0 66%, #3eaf60 0); box-shadow: inset 0 0 0 9px #4285f4; }
.toggle { width: 42px; height: 24px; padding: 3px; display: flex; justify-content: flex-end; border-radius: 30px; background: #2f70e8; }
.toggle i { width: 18px; height: 18px; border-radius: 50%; background: #fff; }
.setting-note { margin-top: 22px; padding: 12px; display: flex; align-items: flex-start; gap: 10px; border-radius: 12px; background: #f5f7fa; }
.setting-note > span { width: 19px; height: 19px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; background: #7c8799; color: #fff; font-size: .7rem; font-weight: 700; }
.setting-note p { margin: 0; font-size: .68rem; text-align: left; }
.wide-step { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0,1.1fr) minmax(280px,.9fr); align-items: center; gap: 32px; }
.wide-step .step-copy { min-height: auto; }
.permission-panel { padding: 24px; display: flex; gap: 16px; align-items: flex-start; border-radius: 18px; background: #f1f5fb; }
.permission-icon { width: 45px; height: 45px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 15px; background: #fff; color: var(--blue); font-size: 1.35rem; box-shadow: 0 7px 16px rgba(23,32,51,.08); }
.permission-panel strong { font-size: .9rem; }
.permission-panel p { margin: 5px 0 0; color: var(--muted); font-size: .8rem; line-height: 1.55; }
.help-section { max-width: 900px; margin: 0 auto; padding: 96px 28px 110px; }
.help-heading { margin-bottom: 27px; display: flex; gap: 16px; align-items: flex-start; }
.help-heading > span { width: 44px; height: 44px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 14px; background: var(--blue-soft); color: var(--blue); font-weight: 800; }
.help-heading h2 { margin: 0 0 7px; font-size: 1.65rem; letter-spacing: -.025em; }
.help-heading p { margin: 0; color: var(--muted); line-height: 1.55; }
details { border-top: 1px solid var(--line); }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; list-style: none; font-weight: 650; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--blue); font-size: 1.2rem; }
details[open] summary::after { content: "−"; }
details > p { margin: -2px 0 11px; color: var(--muted); font-size: .9rem; line-height: 1.65; }
details > a { display: inline-block; margin: 0 0 20px; color: var(--blue); font-size: .86rem; font-weight: 650; }
.safety-warning { margin: 26px 0 0; padding: 17px 19px; border: 1px solid #f4dda7; border-radius: 15px; background: var(--warning-soft); color: #754207; font-size: .86rem; line-height: 1.55; }
footer { min-height: 78px; padding: 20px 28px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
footer a { color: var(--blue); text-decoration: none; font-weight: 650; }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 26px; padding-top: 56px; }
  .hero-copy { text-align: center; }
  .hero-lead, .trust-note { margin-left: auto; margin-right: auto; }
  .download-row, .meta-list { justify-content: center; }
  .hero-device { min-height: 500px; }
  .steps { grid-template-columns: 1fr; }
  .wide-step { grid-column: auto; grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .site-header { min-height: 66px; padding: 9px 16px; }
  .brand img { height: 31px; max-width: 150px; }
  .back-link { display: none; }
  .hero { min-height: auto; padding: 48px 20px 62px; }
  h1 { font-size: 2.7rem; }
  .trust-note { text-align: left; }
  .download-button { width: 100%; justify-content: center; }
  .download-status { max-width: none; width: 100%; }
  .hero-device { min-height: 430px; }
  .device-shell { width: 238px; height: 472px; border-radius: 37px; transform: rotate(1.5deg); }
  .device-screen { padding: 60px 20px 20px; }
  .app-mark { width: 64px; height: 64px; border-radius: 20px; font-size: 2rem; }
  .device-glow { width: 330px; height: 330px; }
  .guide-section, .help-section { padding: 70px 16px 78px; }
  .step-card { padding: 20px 16px; border-radius: 20px; }
  .step-copy { min-height: auto; }
  .android-shot { margin-top: 24px; }
  footer { flex-direction: column; justify-content: center; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}