/* Sparko — shared styles */
:root {
  --primary: #1565C0;
  --primary-dark: #0D47A1;
  --primary-container: #D1E4FF;
  --on-primary-container: #0D47A1;
  --secondary: #00838F;
  --tertiary: #00695C;
  --error: #D32F2F;
  --success: #4CAF50;
  --success-container: #E1F5E4;
  --on-success-container: #1B5E20;
  --warning: #F57F17;
  --surface: #FFFFFF;
  --surface-alt: #F5F8FC;
  --on-surface: #1A1C1E;
  --on-surface-muted: #5A6470;
  --border: #E1E6EC;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --shadow-sm: 0 1px 3px rgba(13, 71, 161, 0.08);
  --shadow-md: 0 8px 24px rgba(13, 71, 161, 0.12);
  --max-width: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #11161C;
    --surface-alt: #161D26;
    --on-surface: #E6ECF2;
    --on-surface-muted: #A4B0BD;
    --border: #2A3340;
    --primary: #4A90E2;
    --primary-dark: #1565C0;
    --primary-container: #1E3A5F;
    --on-primary-container: #BBD7F5;
    --success-container: #1F3A24;
    --on-success-container: #A5D6A7;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--on-surface);
  background: var(--surface);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* Header */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(180%) blur(10px);
}
.nav {
  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(--on-surface);
}
.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 16px;
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  color: var(--on-surface-muted);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--primary); text-decoration: none; }

/* Hero */
.hero {
  padding: 96px 0 80px;
  background:
    radial-gradient(1200px 400px at 80% -100px, var(--primary-container), transparent 60%),
    radial-gradient(1000px 360px at 0% -120px, rgba(0, 131, 143, 0.18), transparent 60%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-container);
  color: var(--on-primary-container);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: 56px;
  line-height: 1.05;
  margin: 16px 0 20px;
  letter-spacing: -0.02em;
}
.hero p.lead {
  font-size: 20px;
  color: var(--on-surface-muted);
  margin-bottom: 32px;
  max-width: 560px;
}
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: transform 0.06s ease, box-shadow 0.2s ease;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; box-shadow: var(--shadow-md); }
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-secondary:hover { background: var(--primary-container); text-decoration: none; }
.btn:active { transform: translateY(1px); }

/* Phone mockup */
.phone {
  width: 280px;
  height: 580px;
  margin: 0 auto;
  background: #F0F4FA;
  border-radius: 36px;
  border: 8px solid #1A2B45;
  box-shadow: var(--shadow-md);
  padding: 20px 16px;
  position: relative;
  overflow: hidden;
}
.phone-card {
  background: #FFFFFF;
  color: #1A1C1E;
}
.phone::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 22px;
  background: #1A2B45;
  border-radius: 0 0 12px 12px;
}
.phone-status {
  margin-top: 18px;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 16px;
  text-align: center;
}
.phone-status .dot {
  width: 10px;
  height: 10px;
  background: var(--success);
  border-radius: 50%;
  display: inline-block;
  margin-right: 8px;
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}
.phone-card {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid #E1E6EC;
  border-radius: 14px;
}
.phone-card .title { font-size: 13px; font-weight: 700; color: #1A1C1E; }
.phone-card .meta { font-size: 11px; color: #5A6470; margin-top: 4px; }
.phone-card .row { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; font-size: 12px; color: #1A1C1E; }
.phone-card .row strong { color: #1A1C1E; font-size: 14px; }
.tag {
  display: inline-block;
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--primary-container);
  color: var(--on-primary-container);
  font-weight: 700;
}
.tag-success { background: var(--success-container); color: var(--on-success-container); }

/* Sections */
section { padding: 96px 0; }
section.alt { background: var(--surface-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 {
  font-size: 40px;
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.section-head p { color: var(--on-surface-muted); font-size: 18px; margin: 0; }

/* Feature grid */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature {
  padding: 28px;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature .icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(21, 101, 192, 0.25);
}
.feature .icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.feature h3 { margin: 0 0 8px; font-size: 18px; }
.feature p { margin: 0; color: var(--on-surface-muted); font-size: 15px; }

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}
.step {
  padding: 24px;
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 14px;
}
.step h4 { margin: 0 0 8px; font-size: 16px; }
.step p { margin: 0; color: var(--on-surface-muted); font-size: 14px; }

/* Privacy callout */
.callout {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: var(--radius-md);
  padding: 48px;
  text-align: center;
}
.callout h2 { font-size: 32px; margin: 0 0 12px; }
.callout p { font-size: 18px; margin: 0 0 24px; opacity: 0.92; }
.callout .btn-primary { background: #fff; color: #0D47A1; }
.callout .btn-primary:hover { background: #E8F1FC; color: #0D47A1; }

/* FAQ */
.faq { max-width: 780px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 12px;
  background: var(--surface);
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq summary::after { content: "+"; font-size: 24px; font-weight: 300; color: var(--primary); margin-left: 16px; }
.faq details[open] summary::after { content: "−"; }
.faq details[open] { box-shadow: var(--shadow-sm); }
.faq p { margin: 14px 0 0; color: var(--on-surface-muted); }

/* Footer */
footer.site-footer {
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  margin-top: 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 32px;
}
.footer-grid p { color: var(--on-surface-muted); max-width: 360px; margin: 12px 0 0; }
.footer-col h5 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--on-surface-muted);
  margin: 0 0 12px;
}
.footer-col a {
  display: block;
  color: var(--on-surface);
  font-size: 14px;
  margin-bottom: 8px;
}
.footer-bar {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--on-surface-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* Legal pages */
.legal { padding: 64px 0 96px; }
.legal-header {
  margin-bottom: 48px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.legal-header h1 {
  font-size: 44px;
  margin: 8px 0 12px;
  letter-spacing: -0.02em;
}
.legal-header .updated { color: var(--on-surface-muted); font-size: 14px; }
.legal-body { max-width: 820px; }
.legal-body h2 {
  font-size: 24px;
  margin: 40px 0 16px;
  letter-spacing: -0.01em;
}
.legal-body h3 { font-size: 18px; margin: 24px 0 10px; }
.legal-body p, .legal-body li { font-size: 16px; color: var(--on-surface); }
.legal-body p { margin: 0 0 14px; }
.legal-body ul { padding-left: 22px; margin: 0 0 16px; }
.legal-body li { margin-bottom: 8px; }
.legal-body strong { color: var(--on-surface); }
.legal-body code {
  background: var(--surface-alt);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  border: 1px solid var(--border);
}
.legal-body em { color: var(--on-surface-muted); }
.legal-body a { color: var(--primary); font-weight: 500; }
.legal-body .note {
  background: var(--primary-container);
  color: var(--on-primary-container);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--primary);
  margin: 16px 0 24px;
}
.legal-body .note strong { color: var(--on-primary-container); }
.toc {
  background: var(--surface-alt);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-bottom: 32px;
}
.toc h4 { margin: 0 0 12px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--on-surface-muted); }
.toc ol { margin: 0; padding-left: 20px; columns: 2; column-gap: 32px; }
.toc li { font-size: 14px; margin-bottom: 6px; }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 64px 0 48px; }
  .hero h1 { font-size: 40px; }
  .hero p.lead { font-size: 18px; }
  .features { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  section { padding: 64px 0; }
  .section-head h2 { font-size: 30px; }
  .callout { padding: 32px 24px; }
  .toc ol { columns: 1; }
  .legal-header h1 { font-size: 32px; }
  .nav-links { gap: 16px; }
  .nav-links a:not(.btn) { display: none; }
}