@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap");

:root {
  --primary: #5b5cf0;
  --primary-dark: #4445d4;
  --secondary: #11b8d5;
  --accent: #8b5cf6;
  --ink: #101426;
  --ink-soft: #2d3550;
  --muted: #667085;
  --surface: #ffffff;
  --surface-soft: #f6f8ff;
  --surface-tint: #eef2ff;
  --line: #e4e8f2;
  --success: #0f9f70;
  --warning: #c17b12;
  --danger: #c84c5a;
  --shadow-sm: 0 8px 24px rgba(38, 45, 88, .08);
  --shadow-md: 0 18px 50px rgba(39, 46, 92, .12);
  --shadow-lg: 0 32px 90px rgba(36, 42, 86, .18);
  --radius-sm: 14px;
  --radius: 22px;
  --radius-lg: 32px;
  --header-height: 82px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  font-family: Poppins, Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: 560px;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(circle at 8% 18%, rgba(91, 92, 240, .12), transparent 34%),
    radial-gradient(circle at 86% 10%, rgba(17, 184, 213, .10), transparent 30%);
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease, opacity .2s ease; }
a:hover { color: var(--primary-dark); }
button, input, textarea, select { font: inherit; }
::selection { color: #fff; background: var(--primary); }

.container { width: min(1140px, calc(100% - 40px)); margin-inline: auto; }
.narrow { width: min(810px, 100%); margin-inline: auto; }
.section { position: relative; padding: 96px 0; scroll-margin-top: 110px; }
.section-soft {
  background:
    linear-gradient(180deg, rgba(246, 248, 255, .96), rgba(251, 252, 255, .98)),
    radial-gradient(circle at 85% 10%, rgba(17, 184, 213, .09), transparent 35%);
  border-top: 1px solid rgba(228, 232, 242, .8);
  border-bottom: 1px solid rgba(228, 232, 242, .8);
}
.section-dark {
  color: #fff;
  overflow: hidden;
  background:
    radial-gradient(circle at 8% 0%, rgba(91, 92, 240, .38), transparent 34%),
    radial-gradient(circle at 100% 100%, rgba(17, 184, 213, .24), transparent 36%),
    #101426;
}
.section-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .16;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, #000, transparent 88%);
}
.section-dark > * { position: relative; z-index: 1; }
.section-dark .section-lead, .section-dark .eyebrow { color: #c5cee2; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 12px;
  padding: 7px 12px;
  border: 1px solid rgba(91, 92, 240, .18);
  border-radius: 999px;
  color: var(--primary);
  background: rgba(91, 92, 240, .07);
  font-size: .73rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 0 0 5px rgba(91, 92, 240, .08);
}
.section-heading { max-width: 820px; margin: 0 auto 48px; text-align: center; }
.section-heading h2 {
  margin: 0 0 14px;
  font-family: Poppins, Arial, sans-serif;
  font-size: clamp(2rem, 4vw, 3.35rem);
  font-weight: 750;
  line-height: 1.14;
  letter-spacing: -.045em;
}
.section-lead { max-width: 760px; margin: 0 auto; color: var(--muted); font-size: 1.03rem; }

.skip-link {
  position: fixed;
  left: 18px;
  top: -80px;
  z-index: 9999;
  padding: 11px 16px;
  border-radius: 10px;
  color: #fff;
  background: var(--ink);
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 12px 0;
  background: rgba(255, 255, 255, .76);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: padding .25s ease, background .25s ease;
}
.site-header.is-scrolled { padding: 7px 0; background: rgba(255, 255, 255, .92); }
.header-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 10px 14px 10px 20px;
  border: 1px solid rgba(220, 225, 239, .92);
  border-radius: 22px;
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 16px 40px rgba(35, 42, 84, .09);
  transition: box-shadow .25s ease, border-color .25s ease, transform .25s ease;
}
.site-header.is-scrolled .header-inner { border-color: rgba(200, 207, 227, .94); box-shadow: 0 18px 46px rgba(35, 42, 84, .14); transform: translateY(-1px); }
.brand { display: inline-flex; align-items: center; margin-right: auto; }
.brand img { width: 208px; height: auto; }
.main-nav { display: flex; align-items: center; gap: 7px; }
.main-nav > a:not(.button) {
  position: relative;
  padding: 10px 10px;
  border-radius: 10px;
  color: #39415b;
  font-size: .83rem;
  font-weight: 650;
  white-space: nowrap;
}
.main-nav > a:not(.button):hover, .main-nav > a.active:not(.button) { color: var(--primary); background: var(--surface-tint); }

.button, .download-button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 14px;
  font-weight: 750;
  letter-spacing: -.01em;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover, .download-button:hover { transform: translateY(-2px); }
.button-primary, .download-button {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #6f43e9 58%, var(--secondary));
  box-shadow: 0 14px 30px rgba(91, 92, 240, .24);
}
.button-primary:hover, .download-button:hover { color: #fff; box-shadow: 0 18px 38px rgba(91, 92, 240, .34); }
.button-secondary {
  color: var(--ink);
  border-color: #d9deec;
  background: rgba(255,255,255,.88);
  box-shadow: 0 8px 24px rgba(35,42,84,.06);
}
.button-secondary:hover { color: var(--primary); border-color: rgba(91,92,240,.45); }
.header-cta { min-height: 46px; padding: 0 17px; border-radius: 12px; }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: var(--surface-soft);
  cursor: pointer;
}

.hero {
  position: relative;
  min-height: 690px;
  display: flex;
  align-items: center;
  padding: 72px 0 104px;
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 15%, rgba(91, 92, 240, .15), transparent 29%),
    radial-gradient(circle at 88% 20%, rgba(17, 184, 213, .16), transparent 30%),
    linear-gradient(180deg, #fbfcff 0%, #f3f6ff 100%);
}
.hero::before {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  right: -220px;
  top: -180px;
  border-radius: 50%;
  border: 80px solid rgba(91,92,240,.055);
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 90px;
  background: linear-gradient(to bottom right, transparent 49%, #fff 50%);
  pointer-events: none;
}
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1.03fr .97fr; align-items: center; gap: 64px; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 13px;
  border: 1px solid rgba(91,92,240,.16);
  border-radius: 999px;
  color: var(--primary);
  background: rgba(255,255,255,.68);
  box-shadow: var(--shadow-sm);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.hero-kicker::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--secondary); box-shadow: 0 0 0 6px rgba(17,184,213,.10); }
.hero h1 {
  max-width: 650px;
  margin: 22px 0 22px;
  font-family: Poppins, Arial, sans-serif;
  font-size: clamp(3.15rem, 6.2vw, 5.9rem);
  font-weight: 800;
  line-height: .98;
  letter-spacing: -.065em;
}
.hero h1 span {
  display: block;
  color: transparent;
  background: linear-gradient(100deg, var(--primary) 5%, #7b4fe6 48%, var(--secondary) 95%);
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-copy { max-width: 640px; margin: 0; color: var(--muted); font-size: 1.08rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin: 31px 0 27px; }
.trust-row { display: flex; flex-wrap: wrap; gap: 10px; }
.trust-row span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 10px;
  border: 1px solid rgba(219,224,237,.9);
  border-radius: 999px;
  color: #4b556f;
  background: rgba(255,255,255,.7);
  font-size: .79rem;
  font-weight: 650;
}
.trust-row span::before { content: "✓"; color: var(--success); font-weight: 900; }
.hero-visual {
  position: relative;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.95);
  border-radius: 34px;
  background: linear-gradient(145deg, rgba(255,255,255,.88), rgba(255,255,255,.48));
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}
.hero-visual::before {
  content: "";
  position: absolute;
  inset: -18px 16% auto -18px;
  height: 42%;
  z-index: -1;
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(91,92,240,.36), rgba(17,184,213,.28));
  filter: blur(34px);
}
.hero-visual img { width: 100%; border-radius: 22px; box-shadow: 0 22px 55px rgba(12,20,50,.24); }
.caption-card {
  position: absolute;
  left: -34px;
  bottom: 32px;
  max-width: 270px;
  padding: 17px 18px;
  border: 1px solid rgba(220,225,239,.9);
  border-radius: 16px;
  color: var(--ink-soft);
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  font-size: .84rem;
}
.caption-card strong { display: block; margin-bottom: 3px; color: var(--primary); font-size: .9rem; }

.editorial-split { display: grid; grid-template-columns: .88fr 1.12fr; gap: 34px; align-items: stretch; }
.sticky-note {
  position: relative;
  top: auto;
  min-height: 100%;
  padding: 42px;
  border: 1px solid rgba(91,92,240,.14);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 100% 0%, rgba(17,184,213,.17), transparent 35%),
    linear-gradient(145deg, #f8f9ff, #eef2ff);
  box-shadow: var(--shadow-sm);
}
.display-quote {
  margin: 0 0 26px;
  font-family: Poppins, Arial, sans-serif;
  font-size: clamp(2rem, 3.5vw, 3.35rem);
  font-weight: 760;
  line-height: 1.15;
  letter-spacing: -.045em;
}
.body-copy {
  padding: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.body-copy p { margin: 0 0 18px; color: var(--muted); }
.fact-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 30px; }
.fact {
  min-width: 0;
  padding: 17px 14px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--surface-soft);
}
.fact strong { display: block; color: var(--primary); font-size: 1.35rem; line-height: 1.2; }
.fact span { display: block; margin-top: 4px; color: var(--muted); font-size: .76rem; }

.feature-ledger { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: feature; }
.feature-card {
  position: relative;
  min-height: 255px;
  padding: 30px 24px 26px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.92);
  box-shadow: var(--shadow-sm);
  counter-increment: feature;
  transition: transform .24s ease, border-color .24s ease, box-shadow .24s ease;
}
.feature-card:hover { transform: translateY(-7px); border-color: rgba(91,92,240,.35); box-shadow: var(--shadow-md); }
.feature-card::before {
  content: counter(feature, decimal-leading-zero);
  position: absolute;
  right: 18px;
  top: 14px;
  color: rgba(91,92,240,.11);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
}
.feature-card::after {
  content: "";
  position: absolute;
  right: -46px;
  bottom: -54px;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(91,92,240,.08), rgba(17,184,213,.12));
}
.feature-rule { width: 46px; height: 7px; border-radius: 999px; background: linear-gradient(90deg, var(--primary), var(--secondary)); }
.feature-card h3 { margin: 26px 0 10px; font-size: 1.08rem; line-height: 1.35; }
.feature-card p { position: relative; z-index: 1; margin: 0; color: var(--muted); font-size: .91rem; }

.process {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  border: 0;
  border-radius: 0;
  overflow: visible;
}
.process::before { content: ""; position: absolute; left: 10%; right: 10%; top: 43px; height: 2px; background: linear-gradient(90deg, var(--primary), var(--secondary)); opacity: .55; }
.process-step {
  position: relative;
  z-index: 1;
  padding: 28px 24px 26px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 22px;
  background: rgba(255,255,255,.075);
  backdrop-filter: blur(12px);
  transition: transform .24s ease, background .24s ease;
}
.process-step:hover { transform: translateY(-6px); background: rgba(255,255,255,.11); }
.process-step .num {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  border: 1px solid rgba(255,255,255,.23);
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 12px 25px rgba(0,0,0,.22);
  font-size: 1rem;
  font-weight: 800;
}
.process-step h3 { margin: 0 0 9px; font-size: 1.08rem; }
.process-step p { margin: 0; color: #bdc7dc; font-size: .9rem; }

.use-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; grid-auto-rows: minmax(210px, auto); gap: 18px; }
.use-card {
  position: relative;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform .24s ease, box-shadow .24s ease;
}
.use-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.use-card:first-child {
  grid-row: span 2;
  border-color: transparent;
  color: #fff;
  background:
    radial-gradient(circle at 90% 12%, rgba(17,184,213,.38), transparent 30%),
    linear-gradient(145deg, #4b4ce0, #6d45dd 60%, #1aaec8);
}
.use-card:first-child p { color: rgba(255,255,255,.8); }
.use-card h3 { margin: 18px 0 10px; font-size: 1.4rem; line-height: 1.3; }
.use-card p { margin: 0; color: var(--muted); }
.use-icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 15px; background: var(--surface-tint); font-size: 1.55rem; }
.use-card:first-child .use-icon { background: rgba(255,255,255,.16); }

.compat-layout { display: grid; grid-template-columns: .92fr 1.08fr; gap: 56px; align-items: center; }
.compat-layout > :first-child { padding: 34px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.compat-list { display: grid; gap: 12px; }
.compat-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 15px;
  align-items: start;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  transition: transform .2s ease, border-color .2s ease;
}
.compat-item:hover { transform: translateX(5px); border-color: rgba(91,92,240,.32); }
.compat-item b { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 13px; color: var(--primary); background: var(--surface-tint); }
.compat-item h3 { margin: 0 0 4px; font-size: .98rem; }
.compat-item p { margin: 0; color: var(--muted); font-size: .87rem; }
.note-box { padding: 22px 24px; border: 1px solid rgba(193,123,18,.22); border-left: 5px solid var(--warning); border-radius: 14px; color: #684a18; background: #fff8e9; }

.download-panel {
  position: relative;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 48px;
  align-items: center;
  overflow: hidden;
  padding: 38px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 100% 0%, rgba(17,184,213,.24), transparent 34%),
    linear-gradient(145deg, rgba(255,255,255,.08), rgba(255,255,255,.045));
  box-shadow: 0 24px 70px rgba(0,0,0,.25);
  backdrop-filter: blur(12px);
}
.download-panel img { border-radius: 22px; box-shadow: 0 24px 60px rgba(0,0,0,.32); }
.download-panel h2 { margin: 12px 0 18px; font-size: clamp(2.35rem, 5vw, 4.35rem); font-weight: 800; line-height: 1.04; letter-spacing: -.055em; }
.download-panel p { color: #c2cbe0; }
.download-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 21px 0; }
.download-meta span { padding: 7px 11px; border: 1px solid rgba(255,255,255,.15); border-radius: 999px; color: #dde5f4; background: rgba(255,255,255,.06); font-size: .76rem; }
.download-note { color: #9eabc3 !important; font-size: .82rem; }

.setup-columns { display: grid; grid-template-columns: .68fr 1.32fr; gap: 42px; align-items: start; }
.toc-card, .sidebar-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255,255,255,.95);
  box-shadow: var(--shadow-sm);
}
.toc-card { position: sticky; top: 106px; }
.toc-card h3, .sidebar-card h3 { margin: 0 0 12px; font-size: 1.05rem; }
.toc-card a, .sidebar-card > a { display: block; padding: 10px 0; border-bottom: 1px solid var(--line); color: #4d5872; font-size: .9rem; font-weight: 600; }
.toc-card a:last-child, .sidebar-card > a:last-child { border-bottom: 0; }
.code-block { margin: 16px 0; padding: 20px 22px; overflow: auto; border: 1px solid rgba(255,255,255,.08); border-radius: 15px; color: #dce9ff; background: #11172a; box-shadow: inset 0 1px 0 rgba(255,255,255,.04); font-family: Consolas, "Courier New", monospace; font-size: .9rem; line-height: 1.7; }
.setup-step { padding: 0 0 29px; margin: 0 0 29px; border-bottom: 1px solid var(--line); }
.setup-step:last-child { border-bottom: 0; }
.setup-step h3 { margin: 0 0 10px; font-size: 1.48rem; }

.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.pc-card { position: relative; padding: 34px; overflow: hidden; border: 1px solid var(--line); border-radius: 24px; box-shadow: var(--shadow-sm); }
.pc-card.pro { background: linear-gradient(145deg, #f1fbf7, #fff); }
.pc-card.con { background: linear-gradient(145deg, #fff5f3, #fff); }
.pc-card h3 { margin: 0 0 16px; font-size: 1.8rem; }
.pc-card ul { margin: 0; padding-left: 20px; }
.pc-card li { margin-bottom: 9px; }

.safety-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 52px; align-items: center; }
.safety-badge {
  aspect-ratio: 1;
  max-width: 325px;
  display: grid;
  place-items: center;
  padding: 46px;
  border: 14px solid rgba(255,255,255,.72);
  border-radius: 50%;
  color: #fff;
  text-align: center;
  background: radial-gradient(circle at 30% 25%, #3de0bd, #0d9f79 65%, #08755b);
  box-shadow: 0 24px 60px rgba(15,159,112,.28), inset 0 0 0 1px rgba(255,255,255,.24);
}
.safety-badge strong { font-size: 2.05rem; line-height: 1.05; }
.check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
.check-item { position: relative; padding: 18px 18px 18px 45px; border: 1px solid var(--line); border-radius: 15px; background: #fff; box-shadow: var(--shadow-sm); }
.check-item::before { content: "✓"; position: absolute; left: 18px; top: 18px; color: var(--success); font-weight: 900; }

.release-table { width: 100%; overflow: hidden; border-collapse: separate; border-spacing: 0; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow-sm); }
.release-table th, .release-table td { padding: 17px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.release-table tr:last-child td { border-bottom: 0; }
.release-table th { color: #3e4964; background: var(--surface-soft); font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; }
.trouble-list { display: grid; gap: 14px; }
.trouble-item { display: grid; grid-template-columns: .9fr 1.35fr; gap: 26px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: var(--shadow-sm); }
.trouble-item h3 { margin: 0; font-size: 1.02rem; }
.trouble-item p { margin: 0; color: var(--muted); }

.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.guide-card, .post-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;
}
.guide-card:hover, .post-card:hover { transform: translateY(-7px); border-color: rgba(91,92,240,.28); box-shadow: var(--shadow-md); }
.guide-card img, .post-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.guide-card-body, .post-card-body { padding: 23px; }
.guide-card h3, .post-card h2 { margin: 0 0 10px; font-size: 1.25rem; line-height: 1.35; letter-spacing: -.025em; }
.guide-card p, .post-card p { margin: 0 0 13px; color: var(--muted); font-size: .9rem; }
.text-link { display: inline-flex; align-items: center; gap: 5px; font-weight: 750; }

.faq-shell { display: block; }
.faq-tabs { position: static; display: flex; justify-content: center; gap: 10px; margin-bottom: 26px; }
.faq-tab {
  width: auto;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: #566078;
  background: #fff;
  font: inherit;
  font-size: .88rem;
  font-weight: 750;
  cursor: pointer;
  transition: .2s ease;
}
.faq-tab:hover { color: var(--primary); border-color: rgba(91,92,240,.3); }
.faq-tab.active { color: #fff; border-color: transparent; background: linear-gradient(135deg, var(--primary), var(--accent)); box-shadow: 0 12px 28px rgba(91,92,240,.24); }
.faq-category { display: none; max-width: 900px; margin: 0 auto; }
.faq-category.active { display: grid; gap: 12px; }
.faq-item { overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: 0 8px 24px rgba(35,42,84,.055); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 22px;
  border: 0;
  color: var(--ink);
  background: transparent;
  text-align: left;
  font-weight: 700;
  cursor: pointer;
}
.faq-question .icon { flex: 0 0 auto; width: 31px; height: 31px; display: grid; place-items: center; border-radius: 10px; color: var(--primary); background: var(--surface-tint); transition: transform .2s ease, color .2s ease, background .2s ease; }
.faq-item.open { border-color: rgba(91,92,240,.25); box-shadow: 0 14px 34px rgba(91,92,240,.10); }
.faq-item.open .faq-question .icon { transform: rotate(45deg); color: #fff; background: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .32s ease; }
.faq-answer p { margin: 0; padding: 0 22px 22px; color: var(--muted); font-size: .93rem; }

.page-hero {
  position: relative;
  padding: 74px 0 76px;
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 10%, rgba(91,92,240,.13), transparent 28%),
    radial-gradient(circle at 92% 0%, rgba(17,184,213,.13), transparent 28%),
    linear-gradient(180deg, #fbfcff, #f4f7ff);
  border-bottom: 1px solid var(--line);
}
.page-hero::after { content: ""; position: absolute; width: 240px; height: 240px; right: 4%; bottom: -160px; border: 44px solid rgba(91,92,240,.055); border-radius: 50%; }
.page-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.08fr .92fr; gap: 50px; align-items: center; }
.page-hero h1 {
  max-width: 830px;
  margin: 14px 0 16px;
  font-size: clamp(2.55rem, 5.5vw, 4.9rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.06em;
}
.page-hero-grid img { border: 10px solid rgba(255,255,255,.8); border-radius: 25px; box-shadow: var(--shadow-lg); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; color: var(--muted); font-size: .78rem; font-weight: 650; }
.breadcrumb a { color: var(--primary); }
.article-meta, .meta { color: var(--primary); font-size: .78rem; font-weight: 750; letter-spacing: .04em; }

.blog-layout { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 34px; align-items: start; }
.post-grid { min-width: 0; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.post-card h2 a { color: var(--ink); }
.post-card h2 a:hover { color: var(--primary); }
.sidebar { display: grid; gap: 18px; position: sticky; top: 108px; }
.info-list { display: grid; gap: 0; }
.info-row { display: flex; align-items: start; justify-content: space-between; gap: 18px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: .84rem; }
.info-row:last-child { border-bottom: 0; }
.info-row span { color: var(--muted); text-align: right; }
.article {
  min-width: 0;
  padding: 42px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.article .intro { margin-top: 0; padding: 22px 24px; border-left: 4px solid var(--primary); border-radius: 0 14px 14px 0; background: var(--surface-soft); color: var(--ink-soft); }
.article h2 { margin: 38px 0 12px; font-size: 1.75rem; line-height: 1.28; letter-spacing: -.035em; }
.article h3 { margin: 28px 0 10px; font-size: 1.25rem; }
.article p { color: #505b73; }
.article ul, .article ol { color: #505b73; padding-left: 22px; }
.related-guides { display: grid; gap: 10px; }
.related-guides a { padding: 13px 15px; border: 1px solid var(--line); border-radius: 12px; color: var(--ink-soft); background: var(--surface-soft); font-weight: 650; }
.related-guides a:hover { color: var(--primary); border-color: rgba(91,92,240,.3); }

.legal-copy { max-width: 860px; }
.legal-copy > *:first-child { margin-top: 0; }
.legal-copy h2 { margin: 34px 0 10px; font-size: 1.55rem; letter-spacing: -.03em; }
.legal-copy p, .legal-copy li { color: #566078; }
.contact-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.contact-card { padding: 30px; border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: var(--shadow-sm); }
.contact-card h2:first-child { margin-top: 0; }
.plain-email { display: inline-flex; padding: 11px 14px; border: 1px solid rgba(91,92,240,.2); border-radius: 12px; color: var(--primary) !important; background: var(--surface-tint); font-weight: 750; }

.site-footer {
  position: relative;
  padding: 72px 0 22px;
  overflow: hidden;
  color: #c8d0e1;
  background:
    radial-gradient(circle at 5% 0%, rgba(91,92,240,.30), transparent 28%),
    radial-gradient(circle at 100% 100%, rgba(17,184,213,.20), transparent 30%),
    #0f1325;
}
.site-footer::before { content: ""; position: absolute; inset: 0; opacity: .13; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); background-size: 56px 56px; mask-image: linear-gradient(to bottom, #000, transparent 95%); }
.site-footer > * { position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 1.45fr .75fr .95fr; gap: 24px; padding-bottom: 38px; align-items: stretch; }
.footer-brand, .footer-col {
  padding: 26px 24px;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 22px;
  background: rgba(255,255,255,.04);
  backdrop-filter: blur(10px);
  box-shadow: 0 14px 34px rgba(0,0,0,.16);
}
.footer-col { display: flex; flex-direction: column; }
.footer-col a { transition: color .2s ease, transform .2s ease; }
.footer-col a:hover { transform: translateX(4px); }
.footer-brand strong { color: #fff; }
.footer-brand img { width: 220px; filter: none; opacity: 1; margin-bottom: 16px; }
.footer-brand p { max-width: 540px; color: #b6c0d7; font-size: .92rem; }
.footer-col h3 { margin: 0 0 15px; color: #fff; font-size: .98rem; }
.footer-col a { display: block; padding: 8px 0; color: #c4cde0; font-size: .89rem; }
.footer-col a:hover { color: #fff; }
.footer-bottom { padding-top: 18px; border-top: 1px solid rgba(255,255,255,.08); color: #a3aec6; text-align: center; font-size: .83rem; }
.footer-bottom a { color: #dbe2f1; }
.footer-disclaimer { margin-top: 10px; color: #c1cbdf; font-size: .83rem; }
.scroll-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 900;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 14px 30px rgba(91,92,240,.28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  cursor: pointer;
  transition: .25s ease;
}
.scroll-top.show { opacity: 1; visibility: visible; transform: translateY(0); }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (max-width: 1080px) {
  .header-inner { padding-right: 8px; }
  .main-nav { gap: 2px; }
  .main-nav > a:not(.button) { padding-inline: 7px; font-size: .78rem; }
  .header-cta { padding-inline: 14px; }
  .feature-ledger { grid-template-columns: repeat(2, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-layout { grid-template-columns: minmax(0, 1fr) 285px; }
}

@media (max-width: 900px) {
  .section { padding: 78px 0; }
  .site-header { padding: 8px 0; }
  .header-inner { min-height: 62px; }
  .menu-toggle { display: grid; place-items: center; }
  .main-nav {
    position: absolute;
    left: 20px;
    right: 20px;
    top: calc(100% + 4px);
    display: none;
    align-items: stretch;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255,255,255,.98);
    box-shadow: var(--shadow-md);
  }
  .main-nav.open { display: grid; }
  .main-nav > a:not(.button) { padding: 11px 12px; font-size: .88rem; }
  .header-cta { width: 100%; margin-top: 5px; }
  .hero { min-height: auto; padding: 58px 0 96px; }
  .hero-grid, .page-hero-grid, .editorial-split, .compat-layout, .download-panel, .setup-columns, .safety-grid, .blog-layout { grid-template-columns: 1fr; }
  .hero-grid { gap: 48px; }
  .hero h1 { font-size: clamp(3rem, 10vw, 5rem); }
  .hero-visual { max-width: 720px; margin-inline: auto; }
  .caption-card { left: 18px; bottom: -20px; }
  .page-hero-grid img { max-width: 720px; }
  .feature-ledger { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .process::before { display: none; }
  .use-grid { grid-template-columns: 1fr 1fr; }
  .use-card:first-child { grid-column: span 2; grid-row: auto; }
  .fact-strip { grid-template-columns: repeat(2, 1fr); }
  .toc-card, .sidebar { position: static; }
  .blog-layout { gap: 25px; }
  .sidebar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.25fr .75fr .9fr; gap: 28px; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 28px, 1140px); }
  .section { padding: 66px 0; }
  .header-inner { padding-left: 12px; border-radius: 16px; }
  .brand img { width: 180px; }
  .hero { padding-top: 42px; }
  .hero h1 { margin-top: 18px; font-size: clamp(2.65rem, 14vw, 4rem); line-height: 1.02; }
  .hero-copy { font-size: .98rem; }
  .hero-actions { display: grid; }
  .button, .download-button { width: 100%; }
  .hero-visual { padding: 10px; border-radius: 23px; }
  .hero-visual img { border-radius: 16px; }
  .caption-card { position: static; max-width: none; margin-top: 12px; }
  .section-heading { margin-bottom: 34px; }
  .section-heading h2 { font-size: 2rem; }
  .sticky-note, .body-copy, .article, .contact-card, .download-panel { padding: 26px 22px; }
  .display-quote { font-size: 2rem; }
  .feature-ledger, .process, .guide-grid, .post-grid, .pros-cons, .check-list, .contact-panel, .sidebar { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; }
  .use-grid { grid-template-columns: 1fr; }
  .use-card:first-child { grid-column: auto; }
  .fact-strip { grid-template-columns: 1fr 1fr; }
  .compat-layout > :first-child { padding: 25px; }
  .download-panel h2 { font-size: 2.6rem; }
  .trouble-item { grid-template-columns: 1fr; gap: 8px; }
  .faq-tabs { display: grid; grid-template-columns: 1fr 1fr; }
  .faq-tab { padding: 11px 10px; font-size: .78rem; }
  .faq-question { padding: 17px 16px; font-size: .9rem; }
  .faq-answer p { padding: 0 16px 18px; font-size: .88rem; }
  .page-hero { padding: 52px 0; }
  .page-hero h1 { font-size: clamp(2.3rem, 12vw, 3.6rem); }
  .article h2 { font-size: 1.48rem; }
  .release-table { display: block; overflow-x: auto; white-space: nowrap; }
  .footer-grid { grid-template-columns: 1fr; gap: 18px; }
  .footer-brand img { width: 190px; }
  .footer-bottom { text-align: left; }
  .footer-brand, .footer-col { padding: 22px 18px; }
  .scroll-top { right: 14px; bottom: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
.hero-guide-link {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 8px;
  color: var(--ink-soft);
  font-size: .92rem;
  font-weight: 750;
}
.hero-guide-link span { transition: transform .2s ease; }
.hero-guide-link:hover span { transform: translateX(4px); }
@media (max-width: 680px) {
  .hero-guide-link { width: 100%; min-height: 44px; }
}
h1, h2, h3, h4, h5, h6,
.button, .download-button, .hero-guide-link,
.main-nav, .faq-question, .faq-tab {
  font-family: Poppins, Arial, sans-serif;
}

/* =========================================================
   V4 — AURORA OCEAN THEME
   Deep navy, aqua, teal and warm gold visual system
   ========================================================= */
:root {
  --primary: #0ea5a8;
  --primary-dark: #087b7e;
  --secondary: #22d3ee;
  --accent: #f4b740;
  --ink: #071826;
  --ink-soft: #183548;
  --muted: #607485;
  --surface: #ffffff;
  --surface-soft: #f5fbfa;
  --surface-tint: #e6f7f5;
  --line: #d8e8e6;
  --success: #159b72;
  --warning: #c68112;
  --danger: #c6505c;
  --shadow-sm: 0 12px 30px rgba(5, 35, 48, .08);
  --shadow-md: 0 24px 55px rgba(5, 35, 48, .13);
  --shadow-lg: 0 38px 100px rgba(2, 25, 39, .24);
}

body {
  color: var(--ink);
  background: #fbfdfc;
}
body::before {
  height: 640px;
  background:
    radial-gradient(circle at 8% 8%, rgba(34, 211, 238, .11), transparent 28%),
    radial-gradient(circle at 91% 13%, rgba(244, 183, 64, .10), transparent 27%);
}
::selection { background: var(--primary); }

.section { padding: 104px 0; }
.section-soft {
  border-color: rgba(216, 232, 230, .8);
  background:
    linear-gradient(180deg, rgba(245, 251, 250, .97), rgba(252, 253, 250, .99)),
    radial-gradient(circle at 82% 10%, rgba(244, 183, 64, .10), transparent 35%);
}
.section-dark {
  background:
    radial-gradient(circle at 10% 0%, rgba(34, 211, 238, .19), transparent 32%),
    radial-gradient(circle at 100% 100%, rgba(244, 183, 64, .16), transparent 34%),
    linear-gradient(145deg, #051726, #082d3e 58%, #061d2d);
}
.section-dark::before { opacity: .12; background-size: 64px 64px; }
.section-dark .section-lead, .section-dark .eyebrow { color: #c7d9df; }

.eyebrow {
  border-color: rgba(14, 165, 168, .22);
  color: #087b7e;
  background: rgba(14, 165, 168, .08);
}
.eyebrow::before {
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(244, 183, 64, .12);
}
.section-heading h2 { letter-spacing: -.05em; }
.section-lead { color: #637888; }

.site-header {
  padding: 14px 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.site-header.is-scrolled { padding: 8px 0; background: rgba(5, 23, 38, .76); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
.header-inner {
  min-height: 72px;
  padding: 10px 12px 10px 20px;
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 24px;
  background: rgba(5, 23, 38, .94);
  box-shadow: 0 20px 52px rgba(2, 20, 32, .26);
}
.site-header.is-scrolled .header-inner {
  border-color: rgba(255,255,255,.13);
  box-shadow: 0 22px 60px rgba(2, 20, 32, .34);
}
.brand img { width: 214px; }
.main-nav > a:not(.button) { color: #c8d9df; }
.main-nav > a:not(.button):hover,
.main-nav > a.active:not(.button) {
  color: #fff;
  background: rgba(34, 211, 238, .10);
}
.header-cta {
  border: 1px solid rgba(255,255,255,.10);
  background: linear-gradient(135deg, var(--primary), #11b8ba 55%, var(--secondary));
  box-shadow: 0 12px 28px rgba(14,165,168,.30);
}
.menu-toggle {
  color: #fff;
  border-color: rgba(255,255,255,.14);
  background: rgba(255,255,255,.08);
}

.button-primary, .download-button {
  color: #061823;
  background: linear-gradient(135deg, var(--accent), #ffd77a 48%, var(--secondary));
  box-shadow: 0 16px 34px rgba(244,183,64,.22);
}
.button-primary:hover, .download-button:hover {
  color: #061823;
  box-shadow: 0 22px 44px rgba(34,211,238,.26);
}
.button-secondary {
  color: #fff;
  border-color: rgba(255,255,255,.20);
  background: rgba(255,255,255,.08);
  box-shadow: none;
}
.button-secondary:hover { color: #fff; border-color: rgba(34,211,238,.55); background: rgba(34,211,238,.10); }

.hero {
  min-height: 760px;
  padding: 92px 0 122px;
  color: #fff;
  background:
    radial-gradient(circle at 13% 18%, rgba(34,211,238,.18), transparent 28%),
    radial-gradient(circle at 90% 12%, rgba(244,183,64,.16), transparent 25%),
    linear-gradient(145deg, #04131f 0%, #082b3b 58%, #061c2b 100%);
}
.hero::before {
  width: 530px;
  height: 530px;
  right: -230px;
  top: -160px;
  border: 86px solid rgba(34,211,238,.05);
}
.hero::after {
  height: 84px;
  background: linear-gradient(to bottom right, transparent 49%, #fbfdfc 50%);
}
.hero-grid { grid-template-columns: .92fr 1.08fr; gap: 74px; }
.hero-kicker {
  color: #bfeff1;
  border-color: rgba(34,211,238,.20);
  background: rgba(255,255,255,.06);
  box-shadow: none;
}
.hero-kicker::before { background: var(--accent); box-shadow: 0 0 0 6px rgba(244,183,64,.12); }
.hero h1 { max-width: 690px; font-size: clamp(3.4rem, 6.4vw, 6.2rem); }
.hero h1 span {
  color: transparent;
  background: linear-gradient(105deg, #fff2c2 5%, var(--accent) 40%, var(--secondary) 92%);
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-copy { color: #bed0d8; }
.trust-row span {
  color: #cfe1e6;
  border-color: rgba(255,255,255,.12);
  background: rgba(255,255,255,.055);
}
.trust-row span::before { color: var(--accent); }
.hero-guide-link { color: #cce5e9; }
.hero-guide-link:hover { color: #fff; }
.hero-visual {
  padding: 14px;
  border-color: rgba(255,255,255,.14);
  border-radius: 34px;
  background: linear-gradient(145deg, rgba(255,255,255,.11), rgba(255,255,255,.035));
  box-shadow: 0 38px 100px rgba(0,0,0,.34);
  transform: rotate(1.2deg);
}
.hero-visual::before {
  inset: -22px 12% auto -20px;
  background: linear-gradient(135deg, rgba(34,211,238,.34), rgba(244,183,64,.22));
}
.hero-visual img { border-radius: 23px; }
.caption-card {
  left: -28px;
  bottom: 28px;
  border-color: rgba(255,255,255,.12);
  color: #cfe0e5;
  background: rgba(4, 24, 38, .91);
  box-shadow: 0 24px 55px rgba(0,0,0,.32);
}
.caption-card strong { color: var(--accent); }

.editorial-split { grid-template-columns: .96fr 1.04fr; gap: 26px; }
.sticky-note {
  padding: 48px;
  border-color: rgba(14,165,168,.15);
  background:
    radial-gradient(circle at 100% 0%, rgba(34,211,238,.15), transparent 34%),
    linear-gradient(145deg, #eaf8f6, #fffaf0);
  box-shadow: 0 22px 50px rgba(5,35,48,.08);
}
.sticky-note::after {
  content: "";
  position: absolute;
  right: 28px;
  bottom: 28px;
  width: 88px;
  height: 88px;
  border: 18px solid rgba(244,183,64,.22);
  border-radius: 50%;
}
.body-copy {
  padding: 48px;
  border-color: rgba(216,232,230,.92);
  box-shadow: 0 22px 50px rgba(5,35,48,.07);
}
.fact { border-color: #dceceb; background: #f7fbfa; }
.fact strong { color: var(--primary-dark); }

.feature-ledger { gap: 20px; }
.feature-card {
  min-height: 270px;
  border: 1px solid #d9e9e7;
  border-radius: 26px;
  background:
    linear-gradient(#fff,#fff) padding-box,
    linear-gradient(135deg, rgba(14,165,168,.45), rgba(244,183,64,.32)) border-box;
  box-shadow: 0 15px 36px rgba(5,35,48,.075);
}
.feature-card:nth-child(2n) { transform: translateY(18px); }
.feature-card:nth-child(2n):hover { transform: translateY(10px); }
.feature-card::before { color: rgba(14,165,168,.10); }
.feature-card::after { background: linear-gradient(135deg, rgba(34,211,238,.12), rgba(244,183,64,.14)); }
.feature-card:hover { border-color: rgba(14,165,168,.38); box-shadow: 0 25px 55px rgba(5,35,48,.13); }
.feature-rule { height: 6px; background: linear-gradient(90deg, var(--primary), var(--accent)); }

.process { gap: 20px; }
.process::before { background: linear-gradient(90deg, var(--secondary), var(--accent)); }
.process-step {
  min-height: 245px;
  border-color: rgba(255,255,255,.13);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(255,255,255,.09), rgba(255,255,255,.035));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}
.process-step .num {
  color: #061823;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
}

.use-grid { grid-template-columns: 1.18fr .82fr .82fr; gap: 20px; }
.use-card { border-color: #d9e8e6; border-radius: 26px; }
.use-card:first-child {
  background:
    radial-gradient(circle at 88% 13%, rgba(244,183,64,.28), transparent 28%),
    linear-gradient(145deg, #087b7e, #0ea5a8 58%, #0b6272);
}
.use-icon { color: var(--primary-dark); background: #e7f8f6; }
.use-card:first-child .use-icon { color: #061823; background: var(--accent); }

.compat-layout > :first-child,
.article,
.contact-card,
.toc-card,
.sidebar-card {
  border-color: #d9e8e6;
  box-shadow: 0 18px 44px rgba(5,35,48,.07);
}
.compat-item { border-color: #d9e8e6; border-radius: 18px; }
.compat-item b { color: #061823; background: linear-gradient(135deg, #c7f4ef, #fff1c7); }
.compat-item:hover { border-color: rgba(14,165,168,.36); }
.note-box { border-color: rgba(244,183,64,.30); border-left-color: var(--accent); background: #fff9e8; }

.download-panel {
  grid-template-columns: .98fr 1.02fr;
  border-color: rgba(255,255,255,.14);
  background:
    radial-gradient(circle at 100% 0%, rgba(244,183,64,.20), transparent 32%),
    radial-gradient(circle at 0 100%, rgba(34,211,238,.18), transparent 32%),
    linear-gradient(145deg, rgba(255,255,255,.09), rgba(255,255,255,.035));
}
.download-panel img { border: 1px solid rgba(255,255,255,.10); }
.download-meta span { border-color: rgba(255,255,255,.14); }

.pc-card { border-color: #d9e8e6; border-radius: 26px; }
.pc-card.pro { background: linear-gradient(145deg, #ecfbf7, #fff); }
.pc-card.con { background: linear-gradient(145deg, #fff7e8, #fff); }
.safety-badge {
  border-color: rgba(255,255,255,.80);
  background: radial-gradient(circle at 30% 25%, #54e9dc, #0ea5a8 60%, #087b7e);
  box-shadow: 0 28px 70px rgba(14,165,168,.24), inset 0 0 0 1px rgba(255,255,255,.28);
}
.check-item { border-color: #d9e8e6; border-radius: 17px; }
.check-item::before { color: var(--primary-dark); }
.release-table { border-color: #d9e8e6; }
.release-table th { background: #edf8f6; }
.trouble-item { border-color: #d9e8e6; border-radius: 20px; }

.guide-grid, .post-grid { gap: 24px; }
.guide-card, .post-card {
  border-color: #d9e8e6;
  border-radius: 26px;
  box-shadow: 0 15px 38px rgba(5,35,48,.08);
}
.guide-card::after, .post-card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}
.guide-card:hover, .post-card:hover {
  border-color: rgba(14,165,168,.33);
  box-shadow: 0 28px 60px rgba(5,35,48,.14);
}
.text-link { color: var(--primary-dark); }

.faq-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 22px;
  border: 1px solid #d9e8e6;
  border-radius: 30px;
  background: linear-gradient(145deg, #f7fbfa, #fffaf1);
  box-shadow: 0 24px 60px rgba(5,35,48,.08);
}
.faq-tabs { margin-bottom: 22px; }
.faq-tab {
  border-color: #d5e7e5;
  border-radius: 999px;
  background: #fff;
}
.faq-tab.active {
  color: #061823;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  box-shadow: 0 12px 28px rgba(14,165,168,.20);
}
.faq-item { border-color: #d9e8e6; border-radius: 18px; box-shadow: none; }
.faq-item.open { border-color: rgba(14,165,168,.34); box-shadow: 0 16px 34px rgba(5,35,48,.08); }
.faq-question .icon { color: #061823; background: #dff5f2; }
.faq-item.open .faq-question .icon { color: #061823; background: var(--accent); }

.page-hero {
  color: #fff;
  border-bottom: 0;
  background:
    radial-gradient(circle at 12% 10%, rgba(34,211,238,.18), transparent 29%),
    radial-gradient(circle at 92% 0%, rgba(244,183,64,.17), transparent 27%),
    linear-gradient(145deg, #04131f, #082d3e 62%, #061c2b);
}
.page-hero::after { border-color: rgba(244,183,64,.08); }
.page-hero .section-lead, .page-hero p { color: #c2d5dc; }
.page-hero h1 { color: #fff; }
.page-hero-grid img { border-color: rgba(255,255,255,.12); box-shadow: 0 36px 90px rgba(0,0,0,.33); }
.breadcrumb { color: #b6cbd3; }
.breadcrumb a, .article-meta, .meta { color: var(--secondary); }

.article .intro { border-left-color: var(--accent); background: #f4fbf9; }
.article p, .article ul, .article ol, .legal-copy p, .legal-copy li { color: #526b7b; }
.code-block { background: #061826; border-color: rgba(34,211,238,.12); }
.related-guides a { border-color: #d9e8e6; background: #f5fbfa; }
.plain-email { color: var(--primary-dark) !important; border-color: rgba(14,165,168,.22); background: #e9f8f6; }

.site-footer {
  padding: 88px 0 30px;
  color: #d2e0e5;
  background:
    radial-gradient(circle at 5% 0%, rgba(34,211,238,.18), transparent 30%),
    radial-gradient(circle at 100% 100%, rgba(244,183,64,.16), transparent 30%),
    linear-gradient(145deg, #04131f, #082736 58%, #061927);
}
.site-footer::before { opacity: .10; background-size: 64px 64px; }
.footer-grid { grid-template-columns: 1.45fr .72fr .95fr; gap: 22px; }
.footer-brand, .footer-col {
  border-color: rgba(255,255,255,.09);
  background: rgba(255,255,255,.045);
  box-shadow: 0 20px 48px rgba(0,0,0,.18);
}
.footer-brand img { width: 228px; }
.footer-brand p { color: #b9cbd2; }
.footer-col a { color: #c6d7dd; }
.footer-bottom { border-top: 0; padding-top: 6px; color: #a8bbc3; }
.footer-disclaimer { color: #bdcdd3; }
.scroll-top {
  color: #061823;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  box-shadow: 0 16px 34px rgba(14,165,168,.24);
}

@media (max-width: 900px) {
  .site-header { padding: 8px 0; background: rgba(5,23,38,.86); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
  .main-nav {
    border-color: rgba(255,255,255,.10);
    background: rgba(5,23,38,.98);
    box-shadow: 0 24px 60px rgba(0,0,0,.32);
  }
  .main-nav > a:not(.button) { color: #d2e0e5; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { transform: none; }
  .feature-card:nth-child(2n), .feature-card:nth-child(2n):hover { transform: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  .section { padding: 72px 0; }
  .header-inner { min-height: 64px; border-radius: 18px; }
  .brand img { width: 176px; }
  .hero { padding-top: 52px; padding-bottom: 104px; }
  .hero h1 { font-size: clamp(2.85rem, 14vw, 4.2rem); }
  .sticky-note, .body-copy { padding: 28px 22px; }
  .faq-shell { padding: 14px; border-radius: 22px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-brand img { width: 196px; }
}


/* Final reliability and responsive fixes */
html, body { max-width: 100%; overflow-x: clip; }
body { overflow-wrap: break-word; }
main, section, .container, .hero-grid > *, .page-hero-grid > *, .editorial-split > *, .compat-layout > *, .download-panel > *, .setup-columns > *, .safety-grid > *, .blog-layout > *, .use-grid > * { min-width: 0; }
img, video, iframe, table, pre, code { max-width: 100%; }
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(24px); }
.js .reveal.visible { opacity: 1; transform: none; }
.download-note code { padding: 2px 6px; border-radius: 6px; color: #eafcff; background: rgba(255,255,255,.10); white-space: normal; }

@media (max-width: 900px) {
  .hero-grid,
  .page-hero-grid,
  .editorial-split,
  .compat-layout,
  .download-panel,
  .setup-columns,
  .safety-grid,
  .blog-layout { grid-template-columns: minmax(0, 1fr) !important; }
  .use-grid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  .use-card:first-child { grid-column: 1 / -1 !important; grid-row: auto !important; }
  .hero-visual { width: 100%; max-width: 720px; margin-inline: auto; }
  .page-hero-grid img { width: 100%; max-width: 720px; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 28px, 1140px); }
  .editorial-split,
  .download-panel,
  .use-grid,
  .feature-ledger,
  .process,
  .fact-strip,
  .guide-grid,
  .post-grid,
  .sidebar,
  .footer-grid { grid-template-columns: minmax(0, 1fr) !important; }
  .use-card:first-child,
  .footer-brand { grid-column: auto !important; }
  .hero-grid { gap: 34px; }
  .hero h1 { font-size: clamp(2.45rem, 12vw, 3.8rem); overflow-wrap: anywhere; }
  .page-hero h1 { overflow-wrap: anywhere; }
  .download-panel { padding: 26px 20px; }
  .download-panel h2 { font-size: clamp(2.15rem, 11vw, 2.8rem); }
  .caption-card { position: static; left: auto; bottom: auto; width: 100%; max-width: none; margin-top: 12px; }
  .main-nav { left: 14px; right: 14px; }
  .scroll-top { right: 14px; bottom: 14px; }
}

@supports not (overflow: clip) {
  html, body { overflow-x: hidden; }
}

/* Requested full-width header and three-line homepage hero */
.site-header,
.site-header.is-scrolled {
  padding: 0;
  background: rgba(5, 23, 38, .98);
  box-shadow: 0 12px 34px rgba(2, 20, 32, .18);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.header-inner,
.site-header.is-scrolled .header-inner {
  min-height: 92px;
  padding: 12px 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transform: none;
}
.hero-grid {
  grid-template-columns: 1.08fr .92fr;
  gap: 62px;
}
.hero h1 {
  max-width: 680px;
  font-size: clamp(2.9rem, 4.5vw, 4.15rem);
  line-height: 1.02;
  letter-spacing: -.055em;
}
.hero h1 .hero-line {
  display: block;
  white-space: nowrap;
  color: #fff;
  background: none;
  -webkit-background-clip: border-box;
  background-clip: border-box;
}
.hero h1 .hero-keyword {
  color: transparent;
  background: linear-gradient(105deg, #fff2c2 5%, var(--accent) 40%, var(--secondary) 92%);
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-copy {
  max-width: 650px;
  font-size: 1.04rem;
}

@media (max-width: 900px) {
  .header-inner,
  .site-header.is-scrolled .header-inner {
    min-height: 76px;
    padding: 8px 0;
  }
  .hero-grid { grid-template-columns: minmax(0, 1fr) !important; }
  .hero h1 { max-width: 720px; font-size: clamp(2.85rem, 8vw, 4rem); }
}

@media (max-width: 680px) {
  .site-header,
  .site-header.is-scrolled { padding: 0; }
  .header-inner,
  .site-header.is-scrolled .header-inner {
    min-height: 68px;
    padding: 7px 0;
    border-radius: 0;
  }
  .hero h1 {
    margin-top: 18px;
    font-size: clamp(1.72rem, 9vw, 2.7rem);
    line-height: 1.04;
    letter-spacing: -.05em;
  }
  .hero-copy { font-size: .97rem; }
}


/* Final footer disclaimer assurance */
.footer-bottom{display:block;width:100%;text-align:center;}
.footer-bottom .copyright-line{display:block;width:100%;}
.footer-bottom .footer-disclaimer{display:block;width:100%;margin:10px 0 0;line-height:1.6;visibility:visible;opacity:1;}
@media (max-width:900px){.footer-bottom{text-align:center;}.footer-bottom .footer-disclaimer{text-align:center;}}