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

:root {
  --bg-deep: #04111f;
  --bg-mid: #061a2b;
  --bg-accent: #07233a;
  --text-primary: rgba(255, 255, 255, 0.92);
  --text-secondary: rgba(255, 255, 255, 0.62);
  --text-muted: rgba(255, 255, 255, 0.42);
  --accent: #5eb8ff;
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.1);
  --max-width: 720px;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
    'Noto Sans KR', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: linear-gradient(145deg, var(--bg-mid) 0%, var(--bg-deep) 50%, var(--bg-accent) 100%);
  background-attachment: fixed;
}

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

a:hover {
  text-decoration: underline;
}

.site-header,
main,
.site-footer {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.site-header {
  padding-top: 3rem;
  padding-bottom: 2rem;
  text-align: center;
}

.app-icon {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.app-name {
  margin: 1.25rem 0 0.5rem;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0;
  font-size: 1.125rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.store-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 1.75rem;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 140px;
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.store-badge:hover {
  text-decoration: none;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
}

.store-badge--soon {
  color: var(--text-muted);
  cursor: default;
  pointer-events: none;
}

main {
  padding-bottom: 3rem;
}

.section-title {
  margin: 0 0 1.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-card {
  padding: 1.25rem 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
}

.feature-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.site-footer {
  padding-top: 2rem;
  padding-bottom: 2.5rem;
  border-top: 1px solid var(--card-border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--accent);
}

.package-id {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
}