:root {
  --accent:           #0055D4;
  --accent-hover:     #0044B3;
  --bg-primary:       #FFFFFF;
  --bg-secondary:     #F2F2F7;
  --bg-tertiary:      #E5E5EA;
  --text-primary:     #1C1C1E;
  --text-secondary:   #6E6E73;
  --text-tertiary:    #AEAEB2;
  --stroke:           #E5E5EA;
  --font:             -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --radius:           16px;
  --padding:          16px;
  --max-width:        1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

/* ─── Header ─────────────────────────────────────────────── */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--stroke);
  height: 56px;
  display: flex;
  align-items: center;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-mark img {
  width: 30px;
  height: 30px;
  border-radius: 7px;
}

.logo-mark span {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

nav a {
  font-size: 15px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

nav a:hover {
  color: var(--text-primary);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 20px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}

.cta-button:hover {
  background: var(--accent-hover);
  color: #fff;
}

.cta-button.disabled {
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
  cursor: default;
  pointer-events: none;
}

.cta-button.large {
  font-size: 17px;
  padding: 14px 28px;
  border-radius: 28px;
}

/* ─── Main layout ─────────────────────────────────────────── */

main {
  padding-top: 56px;
}

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

/* ─── Hero ────────────────────────────────────────────────── */

#hero {
  background: var(--bg-primary);
  padding: 96px 0 80px;
  overflow: hidden;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--text-primary);
}

.hero-sub {
  font-size: 19px;
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 480px;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.hero-image img {
  width: 100%;
  max-width: 320px;
  border-radius: 44px;
  border: 3px solid #000000;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* ─── Why section ─────────────────────────────────────────── */

#why {
  background: var(--bg-secondary);
  padding: 96px 0;
}

.section-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 0;
}

.why-card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.why-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 4px;
}

.why-card h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.why-card p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* ─── Feature sections ────────────────────────────────────── */

.feature-section {
  padding: 96px 0;
}

.feature-section:nth-of-type(even) {
  background: var(--bg-secondary);
}

.feature-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.feature-inner.reverse {
  direction: rtl;
}

.feature-inner.reverse > * {
  direction: ltr;
}

.feature-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--text-primary);
}

.feature-copy p {
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-secondary);
}

.feature-image {
  display: flex;
  justify-content: center;
}

.feature-image img {
  width: 100%;
  max-width: 300px;
  border-radius: 44px;
  border: 3px solid #000000;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.10), 0 4px 16px rgba(0, 0, 0, 0.07);
}

/* ─── Download CTA ────────────────────────────────────────── */

#download {
  background: var(--bg-primary);
  padding: 120px 0;
  text-align: center;
}

#download h2 {
  max-width: 560px;
  margin: 0 auto 16px;
}

#download p {
  font-size: 19px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

/* ─── Footer ──────────────────────────────────────────────── */

footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--stroke);
  padding: 40px 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

footer p {
  font-size: 14px;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: 24px;
}

footer a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
}

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

/* ─── Privacy page ────────────────────────────────────────── */

.prose {
  max-width: 720px;
  margin: 0 auto;
  padding: 80px 24px 120px;
}

.prose h1 {
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -1px;
  margin-bottom: 8px;
}

.prose .effective-date {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 48px;
}

.prose h2 {
  font-size: 22px;
  letter-spacing: -0.5px;
  margin-top: 48px;
  margin-bottom: 12px;
}

.prose p,
.prose li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.prose ul {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.prose a {
  color: var(--accent);
  text-decoration: none;
}

.prose a:hover {
  text-decoration: underline;
}

/* ─── Responsive ──────────────────────────────────────────── */

@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-top: 16px;
  }

  .hero-image {
    order: -1;
  }

  .hero-image img {
    max-width: 240px;
    border-radius: 34px;
  }

  .hero-sub {
    font-size: 17px;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

  .feature-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-inner.reverse {
    direction: ltr;
  }

  .feature-image {
    order: -1;
  }

  .feature-image img {
    max-width: 240px;
    border-radius: 34px;
  }

  #download {
    padding: 80px 0;
  }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  nav .cta-button {
    display: none;
  }
}