/* Privybox marketing site - shared design system */

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f5f7fb;
  --color-bg-dark: #0a0e21;
  --color-text: #14172b;
  --color-text-muted: #565b76;
  --color-border: #e4e7f0;
  --color-primary: #2f5ff6;
  --color-primary-dark: #1f45c9;
  --color-primary-soft: #eaf0ff;
  --color-accent: #12b886;
  --radius: 12px;
  --max-width: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--color-text);
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-primary), #6b8bff);
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  font-size: 15px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active { color: var(--color-primary); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  border: 1px solid var(--color-border);
  background: var(--color-bg-soft);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text-muted);
}

.lang-toggle:hover { border-color: var(--color-primary); color: var(--color-primary); }

.nav-toggle {
  display: none;
  border: none;
  background: none;
  font-size: 24px;
  cursor: pointer;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 20px -8px rgba(47, 95, 246, 0.6);
}

.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); }

.btn-secondary {
  background: #fff;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-block { width: 100%; }

/* ---------- Hero ---------- */

.hero {
  padding: 96px 0 72px;
  text-align: center;
  background: radial-gradient(ellipse at top, var(--color-primary-soft) 0%, #fff 60%);
}

.eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 46px;
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}

.hero p.lead {
  font-size: 19px;
  color: var(--color-text-muted);
  max-width: 620px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ---------- Sections ---------- */

section { padding: 72px 0; }
section.soft { background: var(--color-bg-soft); }

.section-head {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 48px;
}

.section-head .eyebrow { margin-bottom: 14px; }

.section-head h2 {
  font-size: 32px;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.section-head p { color: var(--color-text-muted); font-size: 16px; margin: 0; }

/* ---------- Feature grid ---------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: #fff;
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--color-primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 20px;
}

.feature-card h3 { margin: 0 0 8px; font-size: 17px; }
.feature-card p { margin: 0; color: var(--color-text-muted); font-size: 14.5px; }

/* ---------- Pricing / tier cards ---------- */

.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.tier-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  padding: 32px 28px;
  position: relative;
}

.tier-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 20px 40px -24px rgba(47, 95, 246, 0.45);
}

.tier-badge {
  position: absolute;
  top: -12px;
  left: 28px;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
}

.tier-name { font-size: 20px; font-weight: 700; margin: 0 0 6px; }
.tier-desc { color: var(--color-text-muted); font-size: 14px; margin: 0 0 20px; min-height: 42px; }

.tier-price { display: flex; align-items: baseline; gap: 6px; margin-bottom: 4px; }
.tier-price .amount { font-size: 38px; font-weight: 800; }
.tier-price .period { color: var(--color-text-muted); font-size: 14px; }
.tier-price-note { font-size: 13px; color: var(--color-text-muted); margin-bottom: 24px; }

.tier-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  flex: 1;
}

.tier-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14.5px;
  padding: 7px 0;
  color: var(--color-text);
}

.tier-features li .check { color: var(--color-accent); font-weight: 700; }

/* ---------- Steps (Enterprise flow) ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  background: #fff;
  position: relative;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 14px;
}

.step-card h3 { margin: 0 0 8px; font-size: 15.5px; }
.step-card p { margin: 0; font-size: 13.5px; color: var(--color-text-muted); }

/* ---------- FAQ ---------- */

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.faq-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child { border-bottom: none; }

.faq-item h3 { margin: 0 0 8px; font-size: 16px; }
.faq-item p { margin: 0; color: var(--color-text-muted); font-size: 14.5px; }
.faq-item p a { color: var(--color-primary); text-decoration: underline; }

/* ---------- CTA band ---------- */

.cta-band {
  background: var(--color-bg-dark);
  color: #fff;
  border-radius: 20px;
  padding: 56px 40px;
  text-align: center;
  margin: 0 24px;
}

.cta-band h2 { margin: 0 0 12px; font-size: 28px; }
.cta-band p { margin: 0 0 28px; color: #b9c0e6; font-size: 16px; }

.cta-band .btn-secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
}
.cta-band .btn-secondary:hover { border-color: #fff; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 48px 0 32px;
  margin-top: 72px;
  color: var(--color-text-muted);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-grid h4 {
  color: var(--color-text);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 14px;
}

.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a:hover { color: var(--color-primary); }

.footer-legal {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Utilities ---------- */

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .feature-grid, .tier-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 34px; }
}

@media (max-width: 640px) {
  .main-nav, .nav-actions .btn { display: none; }
  .nav-toggle { display: block; }
  .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { margin: 0 12px; padding: 40px 24px; }
}

/* Mobile nav dropdown (JS toggles .open on .main-nav via #navToggle) */
@media (max-width: 640px) {
  .main-nav.open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 8px 24px 16px;
    box-shadow: 0 12px 24px -12px rgba(20, 23, 43, 0.15);
  }
  .main-nav.open a {
    padding: 10px 0;
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }
  .main-nav.open a:last-child { border-bottom: none; }
}