:root {
  --color-primary: #4F46E5;
  --color-primary-light: #6366F1;
  --color-primary-dark: #3730A3;
  --color-accent: #06B6D4;
  --color-text: #1E293B;
  --color-text-secondary: #64748B;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F8FAFC;
  --color-bg-muted: #F1F5F9;
  --color-border: #E2E8F0;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.1);
  --radius: 12px;
  --max-w: 960px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-primary-dark); }

img { max-width: 100%; display: block; }

/* ── Navigation ── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.nav-brand {
  font-size: 1.2rem; font-weight: 700; color: var(--color-text);
  display: flex; align-items: center; gap: 10px;
}
.nav-brand .icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px; font-weight: 800;
}
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: var(--color-text-secondary); font-size: .9rem; font-weight: 500; }
.nav-links a:hover { color: var(--color-primary); }

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 80px 24px 60px;
  background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.15;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  margin-top: 16px;
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin-left: auto; margin-right: auto;
}
.hero-badges {
  margin-top: 32px;
  display: flex; justify-content: center; gap: 16px; flex-wrap: wrap;
}
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px;
  background: var(--color-text);
  color: #fff;
  border-radius: 10px;
  font-size: .9rem;
  font-weight: 600;
  transition: transform .2s, box-shadow .2s;
}
.badge:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff; }
.badge svg { width: 22px; height: 22px; fill: currentColor; }

/* ── Sections ── */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 64px 24px;
}
.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 8px;
}
.section-subtitle {
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-bottom: 40px;
}

/* ── Feature Grid ── */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.feature-card {
  padding: 28px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: transform .2s, box-shadow .2s;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.feature-icon {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(79,70,229,.1), rgba(6,182,212,.1));
}
.feature-card h3 { font-size: 1.05rem; font-weight: 650; margin-bottom: 6px; }
.feature-card p { font-size: .9rem; color: var(--color-text-secondary); line-height: 1.6; }

/* ── Privacy Highlights ── */
.privacy-bar {
  background: var(--color-bg-muted);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.privacy-items {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 32px;
  text-align: center;
}
.privacy-item { max-width: 200px; }
.privacy-item .emoji { font-size: 28px; margin-bottom: 8px; }
.privacy-item h4 { font-size: .95rem; font-weight: 600; margin-bottom: 4px; }
.privacy-item p { font-size: .82rem; color: var(--color-text-secondary); }

/* ── Legal / Article pages ── */
.article {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.article h1 {
  font-size: 2rem; font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 8px;
}
.article .meta {
  font-size: .85rem;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
}
.article h2 {
  font-size: 1.25rem; font-weight: 700;
  margin-top: 36px; margin-bottom: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}
.article h2:first-of-type { border-top: none; padding-top: 0; }
.article p, .article li {
  font-size: .95rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}
.article ul, .article ol { padding-left: 20px; margin-bottom: 16px; }
.article li { margin-bottom: 6px; }
.article strong { color: var(--color-text); font-weight: 600; }
.article a { text-decoration: underline; text-underline-offset: 2px; }

/* ── Support page ── */
.faq-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}
.faq-item:last-child { border-bottom: none; }
.faq-q { font-weight: 650; font-size: 1rem; margin-bottom: 8px; color: var(--color-text); }
.faq-a { font-size: .92rem; color: var(--color-text-secondary); line-height: 1.7; }

.contact-card {
  margin-top: 40px;
  padding: 28px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.contact-card h2 { font-size: 1.15rem; font-weight: 700; margin-bottom: 12px; border: none; padding: 0; margin-top: 0; }
.contact-card p { margin-bottom: 8px; }

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 24px;
  text-align: center;
  font-size: .82rem;
  color: var(--color-text-secondary);
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
.footer-links { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin-bottom: 12px; }
.footer-links a { color: var(--color-text-secondary); }
.footer-links a:hover { color: var(--color-primary); }
.footer .icp { margin-top: 8px; font-size: .78rem; color: #94A3B8; }
.footer .icp a { color: #94A3B8; }
.footer .icp a:hover { color: var(--color-primary); }

/* ── Responsive ── */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 56px 20px 40px; }
  .section { padding: 40px 20px; }
  .features { grid-template-columns: 1fr; }
  .privacy-items { gap: 24px; }
}