:root {
  --emerald: #059669;
  --emerald-dark: #047857;
  --emerald-light: #10b981;
  --mint-bg: #ecfdf5;
  --surface: #f9fafb;
  --surface-card: #ffffff;
  --text: #111827;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --radius-lg: 20px;
  --radius-md: 12px;
  --shadow: 0 20px 50px rgba(5, 150, 105, 0.08);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif;
  background: var(--surface);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--emerald);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 20px 88px;
  background: linear-gradient(160deg, #047857 0%, #059669 45%, #10b981 100%);
  color: #fff;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: -40% -20% auto;
  height: 120%;
  background: radial-gradient(
    circle at 50% 0%,
    rgba(255, 255, 255, 0.14) 0%,
    transparent 55%
  );
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.22);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.brand-lockup {
  margin: 0 auto 28px;
}

.brand-logo {
  width: min(320px, 84vw);
  height: auto;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.2));
}

.last-updated {
  margin-top: 22px;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.82);
  letter-spacing: 0.01em;
}

.install-note {
  font-size: 14px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.88);
  max-width: 520px;
  margin: 14px auto 0;
}

.app-version {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.02em;
}

.btn-icon {
  font-size: 17px;
  line-height: 1;
}

.release-dot {
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  flex: 0 0 auto;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.logo-mark {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.16);
  display: grid;
  place-items: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.logo-mark svg {
  width: 32px;
  height: 32px;
}

.logo-text {
  text-align: left;
}

.logo-text strong {
  display: block;
  font-size: 28px;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.logo-text span {
  font-size: 14px;
  opacity: 0.88;
}

.hero h1 {
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}

.hero p.lead {
  font-size: 18px;
  max-width: 560px;
  margin: 0 auto 32px;
  color: rgba(255, 255, 255, 0.9);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: #fff;
  color: var(--emerald-dark);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.hero-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
  max-width: 520px;
  margin: 0 auto;
}

.hero-note a {
  color: #fff;
}

main {
  max-width: 1080px;
  margin: -40px auto 80px;
  padding: 0 20px;
  position: relative;
}

.panel {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: clamp(28px, 4vw, 48px);
  margin-bottom: 28px;
}

.panel h2 {
  text-align: center;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.02em;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  background: var(--surface);
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--mint-bg);
  color: var(--emerald);
  display: grid;
  place-items: center;
  font-size: 18px;
  margin-bottom: 14px;
}

.card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.card p {
  font-size: 14px;
  color: var(--text-muted);
}

.steps {
  display: grid;
  gap: 14px;
}

.step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--mint-bg);
  border: 1px solid #a7f3d0;
}

.step-num {
  flex: 0 0 28px;
  height: 28px;
  border-radius: 999px;
  background: var(--emerald);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.step p {
  font-size: 14px;
  color: var(--text);
}

.hero .release-strip {
  display: inline-flex;
  margin-top: 24px;
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #fff;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.hero .release-strip strong {
  color: #fff;
}

.release-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  justify-content: center;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

.release-strip strong {
  color: var(--emerald-dark);
}

footer {
  text-align: center;
  padding: 48px 20px 64px;
  color: var(--text-muted);
  font-size: 14px;
  border-top: 1px solid var(--border);
  background: #fff;
}

footer nav {
  margin-top: 12px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

footer a {
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .hero {
    padding-top: 56px;
  }

  .brand-lockup {
  margin: 0 auto 28px;
}

.brand-logo {
  width: min(320px, 84vw);
  height: auto;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.2));
}

  .logo {
    flex-direction: column;
    text-align: center;
  }

  .logo-text {
    text-align: center;
  }

  .cta-row {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}