/* Cùng font với UI của app (apps/extension/entrypoints/style.css) để trang giới thiệu và
   các ảnh chụp bên dưới không lệch mặt chữ. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

*, *::before, *::after { box-sizing: border-box; }

:root {
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --fg: #18181b;
  --fg-muted: #52525b;
  --fg-faint: #a1a1aa;
  --line: #e4e4e7;
  --accent: #4f46e5;
  --accent-fg: #ffffff;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09090b;
    --bg-soft: #111113;
    --fg: #fafafa;
    --fg-muted: #a1a1aa;
    --fg-faint: #52525b;
    --line: #27272a;
    --accent: #6d63f2;
  }
}

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap { width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img { width: 28px; height: 28px; }

nav { display: flex; align-items: center; gap: 4px; }

nav a {
  padding: 7px 12px;
  border-radius: 8px;
  color: var(--fg-muted);
  font-size: 14px;
  text-decoration: none;
  transition: background-color .15s, color .15s;
}

nav a:hover { background: var(--bg-soft); color: var(--fg); }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 550;
  text-decoration: none;
  transition: background-color .15s, border-color .15s, transform .15s;
}

.btn:hover { transform: translateY(-1px); }

.btn img { flex: none; width: 18px; height: 18px; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-fg);
}

.btn-ghost:hover { background: var(--bg-soft); }

/* ---------- hero ---------- */

.hero { padding: 88px 0 56px; text-align: center; }

.badge {
  display: inline-block;
  margin-bottom: 24px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg-muted);
  font-size: 13px;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.lead {
  margin: 0 auto 32px;
  max-width: 620px;
  color: var(--fg-muted);
  font-size: clamp(1rem, 2.5vw, 1.175rem);
}

.cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

.cta-note { margin-top: 16px; color: var(--fg-faint); font-size: 13px; }

/* ---------- shots ---------- */

.shot {
  margin: 56px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
}

.shot img { display: block; width: 100%; height: auto; }

.shot figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  color: var(--fg-muted);
  font-size: 13.5px;
}

/* ---------- sections ---------- */

section { padding: 72px 0; }

section + section { border-top: 1px solid var(--line); }

h2 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 680;
  letter-spacing: -0.025em;
}

.section-lead { margin: 0 0 40px; color: var(--fg-muted); }

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 620;
  letter-spacing: -0.01em;
}

.card p { margin: 0; color: var(--fg-muted); font-size: 14.5px; }

.card .icon { display: block; margin-bottom: 14px; font-size: 22px; line-height: 1; }

/* ---------- prose (privacy) ---------- */

.prose { max-width: 720px; padding: 64px 0 88px; }

.prose h1 { font-size: clamp(1.875rem, 5vw, 2.5rem); }

.prose h2 { margin: 44px 0 12px; font-size: 1.25rem; }

.prose p, .prose li { color: var(--fg-muted); }

.prose strong { color: var(--fg); font-weight: 600; }

.prose a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }

.prose ul { padding-left: 22px; }

.prose li { margin-bottom: 8px; }

.updated { color: var(--fg-faint); font-size: 14px; }

table {
  width: 100%;
  margin: 20px 0;
  border-collapse: collapse;
  font-size: 14.5px;
}

th, td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th { background: var(--bg-soft); font-weight: 600; }

td { color: var(--fg-muted); }

/* ---------- footer ---------- */

footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  color: var(--fg-faint);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  justify-content: space-between;
}

footer a { color: var(--fg-muted); text-decoration: none; }

footer a:hover { color: var(--fg); }