:root {
  --sdr-bg-page-top: #f5f5f7;
  --sdr-bg-page-bottom: #e5e7eb;
  --sdr-bg-card: #ffffff;
  --sdr-accent: #ff9300;
  --sdr-accent-soft: rgba(255, 147, 0, 0.12);
  --sdr-text-main: #0f172a;
  --sdr-text-muted: #6b7280;
  --sdr-border-subtle: rgba(148, 163, 184, 0.4);
  --sdr-shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.18);
  --sdr-radius-xl: 24px;
}

.sdr-wrap {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, -system-ui, sans-serif;
  color: var(--sdr-text-main);
}

.sdr-page-gradient {
  background: radial-gradient(circle at top left, var(--sdr-bg-page-top) 0%, #ffffff 35%, var(--sdr-bg-page-bottom) 100%);
  padding-bottom: 64px;
}

.sdr-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px 0;
}

/* Nav */
.sdr-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 8vw;
  margin-bottom: 16px;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(209, 213, 219, 0.9);
}

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

.sdr-nav-icon {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  box-shadow: 0 0 0 1px rgba(148,163,184,0.7), 0 10px 24px rgba(15,23,42,0.15);
}

.sdr-nav-title {
  display: flex;
  flex-direction: column;
}

.sdr-nav-app-name {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.sdr-nav-tagline {
  font-size: 12px;
  color: var(--sdr-text-muted);
}

.sdr-nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.sdr-nav-links a {
  color: var(--sdr-text-muted);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-bottom-color 0.18s ease;
}

.sdr-nav-links a:hover {
  color: #111827;
  border-bottom-color: rgba(148,163,184,0.8);
}

.sdr-nav-cta {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(148,163,184,0.9);
  color: #111827;
  font-size: 13px;
  text-decoration: none;
  background: linear-gradient(to bottom, #ffffff, #f3f4f6);
}

/* Hero */
.sdr-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 42px;
  align-items: center;
  margin-bottom: 72px;
}

.sdr-hero-content h1 {
  font-size: clamp(2.4rem, 3vw, 3.1rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.sdr-hero-subtitle {
  font-size: 1rem;
  color: var(--sdr-text-muted);
  max-width: 520px;
  line-height: 1.6;
}

.sdr-hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 26px 0 14px;
}

.sdr-hero-cta-primary {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  border: none;
  text-decoration: none;
  background: radial-gradient(circle at top left, #ffb347, #ff7a00);
  color: #111827;
  box-shadow: 0 14px 40px rgba(249,115,22,0.35);
}

.sdr-store-pill {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.9;
}

.sdr-store-name {
  font-size: 17px;
  font-weight: 600;
}

.sdr-hero-cta-secondary {
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--sdr-border-subtle);
  text-decoration: none;
  color: #111827;
  font-size: 14px;
  background: linear-gradient(to bottom right, #ffffff, #f3f4f6);
}

.sdr-hero-points {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  color: var(--sdr-text-muted);
  font-size: 14px;
}

.sdr-hero-points li {
  margin-bottom: 4px;
}

/* Device */
.sdr-device-frame {
  position: relative;
  padding: 10px;
  border-radius: 34px;
  background: radial-gradient(circle at top left, #e5e7eb, #f9fafb);
  box-shadow: var(--sdr-shadow-soft);
  border: 1px solid rgba(209,213,219,0.9);
}

.sdr-device-frame img {
  display: block;
  width: 100%;
  border-radius: 26px;
}

.sdr-hero-device {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sdr-hero-caption {
  font-size: 13px;
  color: var(--sdr-text-muted);
}

/* Sections */
.sdr-section {
  margin-bottom: 72px;
}

.sdr-section-header {
  max-width: 720px;
  margin-bottom: 28px;
}

.sdr-section-header h2 {
  font-size: 1.7rem;
  margin: 0 0 6px;
}

.sdr-section-header p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--sdr-text-muted);
}

.sdr-section-alt {
  background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(243,244,246,0.95));
  border-radius: var(--sdr-radius-xl);
  padding: 32px 26px 34px;
  border: 1px solid rgba(209,213,219,0.95);
}

/* Feature grid */
.sdr-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}

.sdr-feature-card {
  background: var(--sdr-bg-card);
  border-radius: 18px;
  padding: 18px 16px 16px;
  border: 1px solid var(--sdr-border-subtle);
  box-shadow: 0 14px 40px rgba(15,23,42,0.08);
}

.sdr-feature-card h3 {
  margin-top: 0;
  margin-bottom: 6px;
  font-size: 1rem;
}

.sdr-feature-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--sdr-text-muted);
}

/* Screens */
.sdr-screens-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.sdr-screen-card {
  margin: 0;
}

.sdr-screen-card figcaption {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--sdr-text-muted);
}

/* Workflow */
.sdr-workflow-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 18px;
}

.sdr-workflow-step {
  background: var(--sdr-bg-card);
  border-radius: 18px;
  padding: 18px 16px 16px;
  border: 1px solid var(--sdr-border-subtle);
  box-shadow: 0 10px 30px rgba(15,23,42,0.06);
}

.sdr-step-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--sdr-accent-soft);
  color: var(--sdr-accent);
  font-size: 12px;
  font-weight: 600;
}

/* Privacy */
.sdr-privacy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  margin-top: 10px;
}

.sdr-privacy-card {
  background: var(--sdr-bg-card);
  border-radius: 18px;
  padding: 18px 16px 16px;
  border: 1px solid var(--sdr-border-subtle);
  box-shadow: 0 10px 30px rgba(15,23,42,0.06);
}

.sdr-privacy-card h3 {
  margin-top: 0;
  margin-bottom: 4px;
  font-size: 0.98rem;
}

.sdr-privacy-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--sdr-text-muted);
}

/* CTA */
.sdr-cta-section {
  margin-top: 40px;
}

.sdr-cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 24px;
  border-radius: var(--sdr-radius-xl);
  background: linear-gradient(135deg, #ffffff, #f3f4f6);
  border: 1px solid rgba(209,213,219,0.95);
  box-shadow: var(--sdr-shadow-soft);
}

.sdr-cta-text h2 {
  margin: 0 0 6px;
  font-size: 1.4rem;
}

.sdr-cta-text p {
  margin: 0;
  color: var(--sdr-text-muted);
  font-size: 0.96rem;
}

/* Footer */
.sdr-footer {
  border-top: 1px solid rgba(209,213,219,0.95);
  padding: 18px 8vw 26px;
  background: linear-gradient(to bottom, #f9fafb, #f3f4f6);
}

.sdr-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 13px;
  color: var(--sdr-text-muted);
}

.sdr-footer-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sdr-footer-icon {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  box-shadow: 0 6px 14px rgba(15,23,42,0.12);
}

.sdr-footer-app {
  margin: 0;
  color: var(--sdr-text-main);
}

.sdr-footer-tagline {
  margin: 0;
}

.sdr-footer-links {
  display: flex;
  gap: 16px;
}

.sdr-footer-links a {
  color: var(--sdr-text-muted);
  text-decoration: none;
}

.sdr-footer-copy {
  flex-basis: 100%;
  margin: 0;
  text-align: left;
  opacity: 0.8;
}

/* Responsive */
@media (max-width: 880px) {
  .sdr-nav {
    padding-inline: 18px;
    gap: 10px;
  }
  .sdr-nav-links {
    display: none;
  }
  .sdr-main {
    padding-inline: 18px;
  }
  .sdr-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }
  .sdr-hero-device {
    max-width: 420px;
  }
  .sdr-cta-inner {
    align-items: flex-start;
  }
}