:root {
  color-scheme: dark;
  --bg: #06100e;
  --bg-deep: #030a08;
  --panel: #0a1916;
  --panel-2: #0e221d;
  --panel-3: #122b24;
  --text: #eafff8;
  --muted: #a5c5bb;
  --faint: #73988d;
  --accent: #4ff0b7;
  --accent-strong: #22d99a;
  --accent-ink: #04120d;
  --line: rgba(168, 255, 223, 0.12);
  --line-strong: rgba(168, 255, 223, 0.25);
  --amber: #ffcf70;
  --amber-bg: rgba(255, 207, 112, 0.08);
  --danger: #ff9aa3;
  --info: #8fd3ff;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  --max: 1180px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% 0%, rgba(79, 240, 183, 0.15), transparent 32rem),
    radial-gradient(circle at 93% 18%, rgba(79, 240, 183, 0.07), transparent 28rem),
    linear-gradient(180deg, #07130f 0%, var(--bg) 35%, #050d0b 100%);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: #b1ffe1; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; border-radius: 4px; }

.skip-link {
  position: fixed; z-index: 100; left: 16px; top: -80px;
  padding: 10px 16px; border-radius: 8px; background: var(--accent); color: var(--accent-ink);
  font-weight: 800; text-decoration: none;
}
.skip-link:focus { top: 14px; }
.wrap { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 16, 14, 0.9);
  backdrop-filter: blur(18px);
}
.header-inner { min-height: 72px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--text); text-decoration: none; flex: 0 0 auto; }
.brand img { width: 42px; height: 42px; filter: drop-shadow(0 0 14px rgba(79, 240, 183, 0.22)); }
.brand span { display: flex; flex-direction: column; line-height: 1.12; }
.brand strong { font-size: 18px; letter-spacing: -0.02em; }
.brand small { color: var(--muted); font-size: 11px; margin-top: 4px; }
.header-nav { display: flex; align-items: center; gap: 20px; margin-left: auto; }
.header-nav a { color: var(--muted); font-size: 13px; font-weight: 650; text-decoration: none; }
.header-nav a:hover { color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 8px; }
.lang-link {
  display: inline-flex; align-items: center; justify-content: center; min-height: 36px; padding: 0 12px;
  border: 1px solid var(--line-strong); border-radius: 9px; color: var(--muted);
  font-size: 12px; font-weight: 750; text-decoration: none;
}
.lang-link:hover { color: var(--text); border-color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 46px; padding: 0 19px; border: 1px solid transparent; border-radius: 11px;
  font: inherit; font-size: 14px; font-weight: 800; text-decoration: none; cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 10px 30px rgba(79, 240, 183, 0.18); }
.btn-primary:hover { background: #78f7ca; color: var(--accent-ink); }
.btn-secondary { background: rgba(79, 240, 183, 0.06); color: var(--accent); border-color: var(--line-strong); }
.btn-secondary:hover { background: rgba(79, 240, 183, 0.11); border-color: var(--accent); }
.btn-small { min-height: 36px; padding: 0 12px; font-size: 12px; border-radius: 9px; }
.btn-block { width: 100%; }

main { overflow: clip; }
.hero { position: relative; padding: 88px 0 70px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr); gap: 56px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 18px; padding: 7px 11px;
  border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(79, 240, 183, 0.05);
  color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase;
}
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px rgba(79, 240, 183, 0.8); }
.hero h1 { margin: 0; max-width: 760px; font-size: clamp(42px, 6.4vw, 72px); line-height: 0.99; letter-spacing: -0.05em; }
.hero h1 em { color: var(--accent); font-style: normal; }
.hero-lead { max-width: 690px; margin: 23px 0 0; color: #bfdbd2; font-size: clamp(16px, 2vw, 19px); line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.quick-facts { display: flex; flex-wrap: wrap; gap: 12px 22px; margin: 26px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 12px; }
.quick-facts li { display: flex; align-items: center; gap: 7px; }
.quick-facts li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 9px rgba(79, 240, 183, 0.55); }

.hero-visual { position: relative; }
.hero-visual::before {
  content: ""; position: absolute; inset: -22px; border-radius: 34px;
  background: radial-gradient(circle at 70% 20%, rgba(79, 240, 183, 0.18), transparent 60%);
  filter: blur(18px); pointer-events: none;
}
.shot-frame { position: relative; padding: 10px; border: 1px solid var(--line-strong); border-radius: 22px; background: linear-gradient(145deg, rgba(79, 240, 183, 0.11), rgba(8, 22, 18, 0.92) 48%); box-shadow: var(--shadow); }
.shot-frame img { display: block; width: 100%; border-radius: 14px; border: 1px solid rgba(255, 255, 255, 0.08); }
.shot-label {
  position: absolute; left: 24px; bottom: 24px; padding: 7px 10px; border-radius: 8px;
  background: rgba(4, 16, 12, 0.9); border: 1px solid rgba(79, 240, 183, 0.36); color: var(--accent);
  font-size: 10px; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase;
}

.section { padding: 70px 0; }
.section-tight { padding: 48px 0; }
.section-heading { max-width: 780px; margin-bottom: 28px; }
.section-kicker { margin: 0 0 8px; color: var(--accent); font-size: 11px; font-weight: 850; letter-spacing: 0.14em; text-transform: uppercase; }
.section-heading h2 { margin: 0; font-size: clamp(30px, 4.3vw, 46px); line-height: 1.08; letter-spacing: -0.035em; }
.section-heading p { margin: 14px 0 0; color: var(--muted); font-size: 16px; }

.info-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.info-card { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(160deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0)); }
.info-card .icon-badge { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 11px; background: rgba(79, 240, 183, 0.09); color: var(--accent); font-size: 18px; font-weight: 900; }
.info-card h3 { margin: 16px 0 7px; font-size: 17px; letter-spacing: -0.015em; }
.info-card p { margin: 0; color: var(--muted); font-size: 14px; }
.info-card.accent { border-color: rgba(79, 240, 183, 0.3); background: linear-gradient(160deg, rgba(79, 240, 183, 0.09), rgba(79, 240, 183, 0.015)); }

.check-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; margin: 0; padding: 0; list-style: none; }
.check-grid li { position: relative; padding: 13px 15px 13px 44px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: rgba(255, 255, 255, 0.018); color: #cde5de; font-size: 14px; }
.check-grid li::before { content: "✓"; position: absolute; left: 15px; top: 12px; display: grid; place-items: center; width: 19px; height: 19px; border-radius: 50%; background: rgba(79, 240, 183, 0.12); color: var(--accent); font-size: 11px; font-weight: 900; }

.download-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.download-card { position: relative; display: flex; flex-direction: column; gap: 16px; padding: 25px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: linear-gradient(160deg, var(--panel-2), var(--panel) 60%); }
.download-card.recommended { border-color: rgba(79, 240, 183, 0.45); box-shadow: 0 18px 60px rgba(0, 0, 0, 0.22); }
.recommend-badge { position: absolute; top: 17px; right: 17px; padding: 4px 8px; border-radius: 999px; background: var(--accent); color: var(--accent-ink); font-size: 9px; font-weight: 900; letter-spacing: 0.06em; text-transform: uppercase; }
.download-card h3 { margin: 0; padding-right: 96px; font-size: 24px; letter-spacing: -0.025em; }
.file-name { margin: 0; color: var(--accent); font-family: var(--mono); font-size: 11px; overflow-wrap: anywhere; }
.download-card p { margin: 0; color: var(--muted); font-size: 14px; }
.meta-list { display: grid; gap: 7px; margin: 0; padding: 14px 0 0; border-top: 1px solid var(--line); list-style: none; color: var(--muted); font-size: 12px; }
.meta-list li { display: flex; justify-content: space-between; gap: 14px; }
.meta-list strong { color: var(--text); font-weight: 700; text-align: right; }
.download-card .btn { margin-top: auto; }

.note { display: grid; grid-template-columns: auto 1fr; gap: 12px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--muted); font-size: 13px; }
.note strong { color: var(--text); }
.note-warning { border-color: rgba(255, 207, 112, 0.32); background: var(--amber-bg); }
.note-warning::before { content: "!"; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: rgba(255, 207, 112, 0.14); color: var(--amber); font-weight: 900; }
.note-info { border-color: rgba(143, 211, 255, 0.25); background: rgba(143, 211, 255, 0.05); }
.note-info::before { content: "i"; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: rgba(143, 211, 255, 0.13); color: var(--info); font-family: Georgia, serif; font-weight: 800; }

.steps { display: grid; gap: 26px; }
.step { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 34px; align-items: start; padding: 26px; border: 1px solid var(--line); border-radius: 24px; background: rgba(9, 24, 20, 0.72); }
.step-copy { min-width: 0; }
.step-heading { display: flex; align-items: flex-start; gap: 13px; margin-bottom: 13px; }
.step-number { flex: 0 0 auto; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(79, 240, 183, 0.3); background: rgba(79, 240, 183, 0.1); color: var(--accent); font-size: 12px; font-weight: 900; }
.step h3 { margin: 4px 0 0; font-size: 24px; line-height: 1.18; letter-spacing: -0.025em; }
.step-lead { margin: 0 0 14px; color: #c5ddd6; font-size: 15px; }
.step-actions { margin: 0; padding-left: 22px; color: var(--muted); font-size: 14px; }
.step-actions li { margin: 7px 0; padding-left: 2px; }
.step-actions strong { color: var(--text); }
.callout { margin-top: 17px; padding: 12px 14px; border-left: 3px solid var(--accent); border-radius: 0 9px 9px 0; background: rgba(79, 240, 183, 0.05); color: var(--muted); font-size: 12.5px; }
.callout strong { color: var(--accent); }
.step-media { margin: 0; }
.step-media a { display: block; border-radius: 15px; }
.step-media img { display: block; width: 100%; border: 1px solid var(--line-strong); border-radius: 15px; box-shadow: 0 18px 50px rgba(0, 0, 0, 0.3); background: var(--bg-deep); }
.step-media figcaption { margin-top: 9px; color: var(--faint); font-size: 11.5px; line-height: 1.5; }
.step-media figcaption strong { color: var(--muted); }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; min-width: 680px; font-size: 13px; }
th, td { padding: 13px 15px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { background: rgba(79, 240, 183, 0.055); color: var(--text); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; }
tr:last-child td { border-bottom: 0; }
td { color: var(--muted); }
td strong { color: var(--text); }

.security-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.security-item { display: flex; gap: 13px; padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255, 255, 255, 0.018); }
.security-item .icon-badge { flex: 0 0 auto; }
.security-item h3 { margin: 0 0 4px; font-size: 15px; }
.security-item p { margin: 0; color: var(--muted); font-size: 13px; }

.faq { display: grid; gap: 9px; }
details { border: 1px solid var(--line); border-radius: 13px; background: rgba(255, 255, 255, 0.018); }
summary { padding: 15px 46px 15px 16px; cursor: pointer; color: var(--text); font-size: 14px; font-weight: 750; list-style: none; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 17px; top: 50%; transform: translateY(-50%); color: var(--accent); font-size: 21px; line-height: 1; }
details[open] summary::after { content: "−"; }
details > div { padding: 0 16px 16px; color: var(--muted); font-size: 13.5px; }
details > div p { margin: 0 0 9px; }
details > div p:last-child { margin-bottom: 0; }

.checksum { display: grid; gap: 10px; margin-top: 14px; }
.checksum code { display: block; padding: 12px 14px; border: 1px solid var(--line); border-radius: 9px; background: var(--bg-deep); color: #b8ffe3; font-family: var(--mono); font-size: 10.5px; line-height: 1.6; overflow-wrap: anywhere; }
.checksum p { margin: 0; color: var(--muted); font-size: 12px; }

.feature-band { padding: 30px; border: 1px solid rgba(79, 240, 183, 0.25); border-radius: 24px; background: radial-gradient(circle at 90% 20%, rgba(79, 240, 183, 0.14), transparent 36%), var(--panel); }
.feature-band h2 { margin: 0 0 8px; font-size: clamp(25px, 4vw, 38px); letter-spacing: -0.03em; }
.feature-band p { max-width: 760px; margin: 0 0 20px; color: var(--muted); }

.site-footer { padding: 38px 0 48px; border-top: 1px solid var(--line); background: rgba(3, 10, 8, 0.55); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; }
.footer-brand { display: flex; align-items: flex-start; gap: 12px; }
.footer-brand img { width: 34px; height: 34px; }
.footer-brand p { margin: 0; color: var(--muted); font-size: 12px; }
.footer-brand strong { display: block; color: var(--text); font-size: 14px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: flex-end; font-size: 12px; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.footer-note { margin: 24px 0 0; color: var(--faint); font-size: 10.5px; }

@media (max-width: 1040px) {
  .header-nav { display: none; }
  .header-actions { margin-left: auto; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-visual { max-width: 860px; }
  .step { grid-template-columns: 1fr; gap: 22px; }
  .info-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .wrap { width: min(var(--max), calc(100% - 28px)); }
  .site-header .header-actions .btn { display: none; }
  .header-inner { min-height: 64px; gap: 12px; }
  .brand small { display: none; }
  .hero { padding: 54px 0 42px; }
  .hero h1 { font-size: clamp(38px, 12vw, 56px); }
  .hero-lead { font-size: 16px; }
  .hero-actions .btn { width: 100%; }
  .section { padding: 50px 0; }
  .section-tight { padding: 36px 0; }
  .check-grid, .download-grid, .security-grid { grid-template-columns: 1fr; }
  .step { padding: 18px; border-radius: 18px; }
  .step h3 { font-size: 21px; }
  .download-card h3 { padding-right: 0; font-size: 21px; }
  .recommend-badge { position: static; align-self: flex-start; }
  .footer-inner { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
  .quick-facts { display: grid; gap: 8px; }
}

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

@media print {
  :root { --text: #08110e; --muted: #344a43; --line: #ccd9d5; }
  body { background: #fff; color: #08110e; }
  .site-header, .hero-actions, .skip-link, .header-actions, .download-card .btn, .feature-band .btn { display: none !important; }
  .hero { padding: 24px 0; }
  .hero-grid, .step { display: block; }
  .step { break-inside: avoid; border-color: #d8e2df; background: #fff; }
  .hero-visual, .step-media { margin-top: 18px; }
  .shot-label { display: none; }
  a { color: #08110e; }
  .info-card, .download-card, .security-item, details { background: #fff; }
}