:root {
  --ios-bg: #f5f5f7;
  --ios-label: #1d1d1f;
  --ios-secondary: #86868b;
  --ios-tertiary: #aeaeb2;
  --ios-separator: rgba(60, 60, 67, 0.12);
  --ios-blue: #0071e3;
  --sms-green: #168565;
  --ios-card: #fff;
  --ios-radius: 18px;
  --ios-inset: 12px;
  --font-sf: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Helvetica Neue", sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sf);
  background: var(--ios-bg);
  color: var(--ios-label);
  -webkit-font-smoothing: antialiased;
  line-height: 1.47;
}
a { color: var(--ios-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.ios-nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: rgba(245, 245, 247, 0.78);
  border-bottom: 0.5px solid var(--ios-separator);
}
.ios-nav-inner {
  max-width: 1024px; margin: 0 auto; padding: 0 max(22px, env(safe-area-inset-right));
  height: 48px; display: flex; align-items: center; gap: 18px;
}
.ios-nav .logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 17px; letter-spacing: -0.02em;
  color: var(--ios-label); text-decoration: none;
}
.ios-nav .logo:hover { text-decoration: none; }
.ios-nav .logo img { width: 26px; height: 26px; border-radius: 6px; }
.ios-nav .links { display: flex; gap: 16px; margin-left: auto; align-items: center; flex-wrap: wrap; }
.ios-nav .links a {
  font-size: 14px; color: var(--ios-secondary); text-decoration: none;
}
.ios-nav .links a:hover { color: var(--ios-label); text-decoration: none; }
.ios-nav .btn-pill {
  font-size: 14px; font-weight: 600; color: #fff !important;
  background: var(--ios-blue); padding: 6px 14px; border-radius: 980px;
  text-decoration: none !important;
}
.ios-nav .btn-pill:hover { opacity: 0.88; }

.ios-page { max-width: 1024px; margin: 0 auto; padding: 0 22px 64px; }
.ios-hero {
  text-align: center; padding: 48px 0 40px;
}
.ios-hero .app-icon {
  width: 80px; height: 80px; border-radius: 18px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
}
.ios-hero h1 {
  margin-top: 20px; font-size: clamp(32px, 5vw, 48px);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1.08;
}
.ios-hero .sub {
  margin-top: 12px; font-size: 19px; color: var(--ios-secondary);
  max-width: 640px; margin-left: auto; margin-right: auto; line-height: 1.45;
}
.ios-hero .cta-row {
  margin-top: 28px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
}
.ios-btn {
  display: inline-block; padding: 12px 22px; border-radius: 980px;
  font-size: 17px; font-weight: 600; letter-spacing: -0.02em;
  text-decoration: none !important;
}
.ios-btn.primary { background: var(--ios-blue); color: #fff; }
.ios-btn.secondary {
  background: var(--ios-card); color: var(--ios-blue);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}
.ios-btn:hover { opacity: 0.92; text-decoration: none !important; }

.ios-section { margin-top: 56px; }
.ios-section h2 {
  font-size: 28px; font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.ios-section .lead {
  font-size: 17px; color: var(--ios-secondary); max-width: 720px; line-height: 1.5;
}

.ios-metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 32px;
}
.ios-metric {
  background: var(--ios-card); border-radius: var(--ios-radius);
  padding: 18px 16px; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.ios-metric span { display: block; font-size: 12px; color: var(--ios-secondary); font-weight: 600; }
.ios-metric strong { display: block; margin-top: 6px; font-size: 22px; letter-spacing: -0.02em; }
.ios-metric em { display: block; margin-top: 4px; font-style: normal; font-size: 12px; color: var(--sms-green); font-weight: 600; }

.ios-group {
  margin-top: 16px; background: var(--ios-card); border-radius: var(--ios-radius);
  overflow: hidden; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.ios-group .row {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 16px; border-bottom: 0.5px solid var(--ios-separator);
  font-size: 15px;
}
.ios-group .row:last-child { border-bottom: none; }
.ios-group .row .ico {
  width: 32px; height: 32px; border-radius: 8px; flex-shrink: 0;
  background: rgba(22, 133, 101, 0.12); color: var(--sms-green);
  display: grid; place-items: center; font-size: 16px;
}
.ios-group .row b { display: block; font-size: 15px; margin-bottom: 2px; }
.ios-group .row p { font-size: 14px; color: var(--ios-secondary); line-height: 1.45; margin: 0; }

.ios-split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; margin-top: 24px;
}
/* iOS Messages thread (SMS green / gray bubbles) */
.ios-thread-demo {
  border-radius: var(--ios-radius);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), inset 0 0 0 0.5px rgba(0, 0, 0, 0.04);
  background: #fff;
}
.ios-thread-inner {
  padding: 14px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  background: #fff;
}
.ios-thread-hint {
  font-size: 11px;
  font-weight: 600;
  color: var(--ios-secondary);
  letter-spacing: -0.02em;
  margin: 10px 4px 4px;
}
.ios-thread-hint:first-child { margin-top: 0; }
.ios-thread-hint.align-out { text-align: right; margin-right: 8px; }
.ios-thread-hint.free { color: #248a3d; }
.ios-bubble-row {
  display: flex;
  width: 100%;
  padding: 1px 0;
}
.ios-bubble-row.out { justify-content: flex-end; }
.ios-bubble-row.in { justify-content: flex-start; }
.ios-bubble {
  position: relative;
  max-width: 78%;
  padding: 8px 14px;
  border-radius: 18px;
  font-size: 16px;
  line-height: 1.35;
  letter-spacing: -0.2px;
  word-break: break-word;
}
.ios-bubble.out {
  background: #34c759;
  color: #fff;
  border-bottom-right-radius: 5px;
  box-shadow: 0 0.5px 0 rgba(0, 0, 0, 0.06);
}
.ios-bubble.in {
  background: #e9e9eb;
  color: #1d1d1f;
  border-bottom-left-radius: 5px;
}
.ios-bubble.out::after,
.ios-bubble.in::after {
  content: "";
  position: absolute;
  bottom: 0;
  width: 14px;
  height: 14px;
  pointer-events: none;
}
.ios-bubble.out::after {
  right: -5px;
  background: radial-gradient(circle at 0 0, transparent 0, transparent 11px, #34c759 12px);
}
.ios-bubble.in::after {
  left: -5px;
  background: radial-gradient(circle at 100% 0, transparent 0, transparent 11px, #e9e9eb 12px);
}
.ios-bubble-meta {
  font-size: 11px;
  color: #8e8e93;
  font-weight: 500;
  margin: 2px 8px 6px;
  letter-spacing: -0.1px;
}
.ios-bubble-meta.out { text-align: right; }

.ios-faq details {
  background: var(--ios-card); border-radius: var(--ios-inset);
  margin-top: 10px; overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.ios-faq summary {
  padding: 14px 16px; font-size: 15px; font-weight: 600; cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.ios-faq summary::-webkit-details-marker { display: none; }
.ios-faq summary::after { content: "+"; color: var(--ios-blue); font-weight: 400; font-size: 20px; }
.ios-faq details[open] summary::after { content: "−"; }
.ios-faq p {
  padding: 0 16px 14px; font-size: 14px; color: var(--ios-secondary); line-height: 1.55;
}

.ios-pricing {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px;
}
.ios-price-card {
  background: var(--ios-card); border-radius: var(--ios-radius); padding: 22px 18px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.ios-price-card.featured { box-shadow: 0 0 0 2px var(--ios-blue), 0 8px 24px rgba(0, 113, 227, 0.12); }
.ios-price-card h3 { font-size: 17px; }
.ios-price-card .amt { font-size: 34px; font-weight: 700; margin: 10px 0 4px; letter-spacing: -0.03em; }
.ios-price-card ul { list-style: none; font-size: 13px; color: var(--ios-secondary); margin: 14px 0 18px; }
.ios-price-card li { padding: 4px 0; }
.ios-price-card li::before { content: "✓ "; color: var(--sms-green); font-weight: 700; }

.ios-footer {
  max-width: 1024px; margin: 0 auto; padding: 36px 22px 48px;
  border-top: 0.5px solid var(--ios-separator);
  font-size: 12px; color: var(--ios-secondary);
}
.ios-footer-grid {
  display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 24px; margin-bottom: 20px;
}
.ios-footer-grid strong { color: var(--ios-label); font-size: 13px; display: block; margin-bottom: 8px; }
.ios-footer-grid a { display: block; margin: 5px 0; color: var(--ios-secondary); text-decoration: none; }
.ios-footer-grid a:hover { color: var(--ios-blue); }
.legal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 18px 0 0;
  margin-top: 16px;
  border-top: 1px solid #e5e7eb;
  font-size: 12px;
  color: #8a8f98;
  width: 100%;
}
.legal-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.legal-links a {
  color: #8a8f98;
  text-decoration: none;
  transition: color 0.2s ease;
}
.legal-links a:hover { color: #222; }
@media (max-width: 768px) {
  .legal-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

.ios-doc { max-width: 720px; margin: 0 auto; padding: 40px 22px 72px; }
.ios-doc h1 { font-size: 34px; font-weight: 700; letter-spacing: -0.03em; margin-bottom: 10px; }
.ios-doc .doc-lead { font-size: 17px; color: var(--ios-secondary); line-height: 1.55; margin-bottom: 28px; }
.ios-doc .step-card {
  background: var(--ios-card); border-radius: var(--ios-radius); padding: 20px 18px;
  margin-top: 12px; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.ios-doc .step-card h2 { font-size: 17px; margin-bottom: 8px; }
.ios-doc .step-card p, .ios-doc .step-card li {
  font-size: 15px; color: var(--ios-secondary); line-height: 1.55;
}
.ios-doc .step-card ul { padding-left: 18px; margin-top: 8px; }

@media (max-width: 900px) {
  .ios-metrics { grid-template-columns: repeat(2, 1fr); }
  .ios-split { grid-template-columns: 1fr; }
  .ios-pricing { grid-template-columns: 1fr; }
  .ios-footer-grid { grid-template-columns: 1fr 1fr; }
  .ios-nav .links .hide-sm { display: none; }
}
@media (max-width: 480px) {
  .ios-metrics { grid-template-columns: 1fr; }
}