/* Profiles Switcher marketing site.
   Static, no build step, no JS framework, native macOS system font.
   Structure modeled on sigmabrowser.com: dark theme, blue accent, big alternating
   feature blocks, a comparison table, advantages grid, pillars, FAQ, rich footer. */

:root {
  --bg: #06070c;
  --bg-2: #0c0e16;
  --panel: rgba(255, 255, 255, 0.035);
  --panel-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f5f7fc;
  --muted: #aab1c4;
  --muted-2: #717892;
  --blue: #2f6bff;
  --blue-2: #6aa3ff;
  --grad: linear-gradient(135deg, #2f6bff 0%, #6b5cff 55%, #8b5cf6 100%);
  --radius: 16px;
  --radius-lg: 24px;
  --maxw: 1140px;
  --shadow: 0 40px 90px -28px rgba(0, 0, 0, 0.75);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }

h1, h2, h3, h4 { letter-spacing: -0.02em; line-height: 1.1; font-weight: 700; }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: 20px; letter-spacing: -0.01em; }
.eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--blue-2); margin-bottom: 14px; }
.lead { color: var(--muted); font-size: clamp(17px, 2.1vw, 20px); margin-top: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-size: 15px; font-weight: 600; padding: 13px 22px; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: transform 0.12s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 12px 34px -10px rgba(47, 107, 255, 0.7); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 18px 44px -10px rgba(47, 107, 255, 0.8); }
.btn-ghost { background: var(--panel-2); color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.10); transform: translateY(-1px); }
.btn-sm { padding: 9px 17px; font-size: 14px; }

/* ---------- Nav ---------- */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(6, 7, 12, 0.72);
  backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.01em; }
.brand img { width: 27px; height: 27px; border-radius: 7px; background: #fff; padding: 2px; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--muted); font-size: 15px; transition: color 0.15s ease; }
.nav-links a:hover { color: var(--text); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-tight { padding: 60px 0; }
.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head.center { margin-inline: auto; text-align: center; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 90px 0 60px; overflow: hidden; }
.hero::before { content: ""; position: absolute; top: -300px; left: 50%; transform: translateX(-50%);
  width: 1000px; height: 1000px; z-index: -1; pointer-events: none;
  background: radial-gradient(circle at center, rgba(47, 107, 255, 0.38), rgba(139, 92, 246, 0.10) 42%, transparent 70%); }
.hero-inner { text-align: center; max-width: 900px; margin-inline: auto; }
.hero h1 { font-size: clamp(40px, 6.4vw, 72px); letter-spacing: -0.03em;
  background: linear-gradient(180deg, #ffffff 58%, #c3cbe0 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero h1 .accent { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { max-width: 680px; margin-inline: auto; margin-top: 22px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.trust { margin-top: 22px; color: var(--muted-2); font-size: 14px; }
.trust b { color: var(--muted); font-weight: 500; }
.hero-shot { margin: 58px auto 0; max-width: 1020px; border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong); box-shadow: var(--shadow); overflow: hidden; background: var(--bg-2); }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; }
.step .num { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px;
  border-radius: 11px; background: var(--grad); color: #fff; font-weight: 700; font-size: 16px; margin-bottom: 18px; }
.step h3 { margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 15px; }

/* ---------- Big alternating feature blocks ---------- */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
  border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 52px;
  background: linear-gradient(180deg, var(--panel-2), transparent); margin-bottom: 28px; }
.feature:last-child { margin-bottom: 0; }
.feature.reverse .feature-media { order: 2; }
.feature-media img { border-radius: var(--radius); border: 1px solid var(--border-strong); box-shadow: var(--shadow); }
.feature h2 { font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 14px; }
.feature p { color: var(--muted); }
.feature ul { list-style: none; margin-top: 22px; display: grid; gap: 13px; }
.feature li { display: flex; gap: 12px; color: var(--muted); font-size: 15px; }
.feature li svg { width: 20px; height: 20px; stroke: var(--blue-2); flex-shrink: 0; margin-top: 3px; }
.feature li b { color: var(--text); font-weight: 600; }
.learn { display: inline-flex; align-items: center; gap: 7px; margin-top: 26px; color: var(--blue-2); font-weight: 600; font-size: 15px; }
.learn svg { width: 16px; height: 16px; transition: transform 0.15s ease; }
.learn:hover svg { transform: translateX(3px); }

/* ---------- Advantages grid (icon cards) ---------- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px;
  transition: transform 0.15s ease, border-color 0.2s ease, background 0.2s ease; }
.card:hover { transform: translateY(-3px); border-color: var(--border-strong); background: var(--panel-2); }
.card .ico { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: rgba(47, 107, 255, 0.14); border: 1px solid rgba(47, 107, 255, 0.28); margin-bottom: 18px; }
.card .ico svg { width: 22px; height: 22px; stroke: var(--blue-2); }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; }

/* ---------- Comparison table ---------- */
.compare-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); }
table.compare { width: 100%; border-collapse: collapse; min-width: 660px; }
table.compare th, table.compare td { padding: 17px 20px; border-bottom: 1px solid var(--border); }
table.compare thead th { font-size: 14px; color: var(--muted); font-weight: 600; text-align: center; }
table.compare thead th:first-child { text-align: left; }
table.compare thead th.you { color: var(--text); }
table.compare tbody th { font-weight: 500; color: var(--text); font-size: 15px; text-align: left; }
table.compare td { text-align: center; font-size: 15px; color: var(--muted-2); }
table.compare td.you { background: rgba(47, 107, 255, 0.09); color: var(--text); }
table.compare tr:last-child th, table.compare tr:last-child td { border-bottom: 0; }
.yes svg { width: 20px; height: 20px; stroke: #4ade80; vertical-align: middle; }
.col-you-head { display: inline-flex; align-items: center; gap: 8px; }
.col-you-head img { width: 20px; height: 20px; border-radius: 5px; background: #fff; padding: 1px; }

/* ---------- Privacy pillars ---------- */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.pillar .ico { width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: rgba(47, 107, 255, 0.14); border: 1px solid rgba(47, 107, 255, 0.28); margin-bottom: 16px; }
.pillar .ico svg { width: 22px; height: 22px; stroke: var(--blue-2); }
.pillar h3 { margin-bottom: 8px; }
.pillar p { color: var(--muted); font-size: 15px; }

/* ---------- Use cases ---------- */
.cases { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.case { border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; background: linear-gradient(180deg, var(--panel-2), transparent); }
.case .tag { font-size: 13px; font-weight: 700; color: var(--blue-2); text-transform: uppercase; letter-spacing: 0.06em; }
.case h3 { margin: 10px 0; font-size: 22px; }
.case p { color: var(--muted); }
.case .flow { margin-top: 16px; font-size: 14px; color: var(--muted-2); }
.case .flow b { color: var(--text); font-weight: 600; }

/* ---------- FAQ ---------- */
.faq { max-width: 820px; margin-inline: auto; }
.faq details { border-bottom: 1px solid var(--border); padding: 22px 4px; }
.faq summary { cursor: pointer; list-style: none; font-weight: 600; font-size: 18px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--blue-2); font-size: 24px; font-weight: 400; line-height: 1; transition: transform 0.2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); margin-top: 14px; font-size: 16px; }

/* ---------- Final CTA ---------- */
.final { text-align: center; padding: 104px 0; }
.final h2 { max-width: 680px; margin: 0 auto 28px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 60px 0 40px; color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer .brand { margin-bottom: 14px; }
.footer p { font-size: 15px; max-width: 300px; }
.footer h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted-2); margin-bottom: 16px; }
.footer ul { list-style: none; display: grid; gap: 10px; }
.footer ul a { color: var(--muted); font-size: 15px; }
.footer ul a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; font-size: 14px; color: var(--muted-2); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* ---------- Prose (help / terms / contact) ---------- */
.prose { max-width: 760px; margin-inline: auto; }
.prose h1 { font-size: clamp(32px, 5vw, 44px); margin-bottom: 10px; }
.prose .updated { color: var(--muted-2); font-size: 15px; margin-bottom: 40px; }
.prose h2 { font-size: 24px; margin: 40px 0 14px; }
.prose h3 { font-size: 19px; margin: 28px 0 10px; }
.prose p, .prose li { color: var(--muted); margin-bottom: 14px; }
.prose ul, .prose ol { padding-left: 22px; margin-bottom: 14px; }
.prose a { color: var(--blue-2); text-decoration: underline; text-underline-offset: 3px; }
.prose strong { color: var(--text); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .steps, .grid, .pillars { grid-template-columns: repeat(2, 1fr); }
  .feature { grid-template-columns: 1fr; gap: 32px; padding: 32px; }
  .feature.reverse .feature-media { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 64px 0; }
  .nav-links { display: none; }
  .steps, .grid, .pillars, .cases { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding-top: 56px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 100; background: #fff; color: #000; padding: 8px 14px; border-radius: 8px; }