:root {
  --color-bg: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #5a5a72;
  --color-accent: #8B5CF6;
  --color-accent-2: #F06292;
  --color-border: #e5e5ee;
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans",
    "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.8;
}

header {
  padding: 32px 20px 24px;
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  flex-shrink: 0;
}

.app-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 64px;
}

h1 {
  font-size: 26px;
  margin-top: 0;
}

h2 {
  font-size: 19px;
  margin-top: 40px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
}

h3 {
  font-size: 16px;
  margin-top: 24px;
}

p,
li {
  color: var(--color-text);
}

.updated-at {
  color: var(--color-text-secondary);
  font-size: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

th,
td {
  text-align: left;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  vertical-align: top;
}

th {
  background: #faf9ff;
}

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

.feature-list {
  padding-left: 20px;
}

.button {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 20px;
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  margin: 4px 8px 4px 0;
}

.button.secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px 48px;
  color: var(--color-text-secondary);
  font-size: 13px;
}

.notice {
  background: #fff7ed;
  border: 1px solid #fdba74;
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 14px;
  margin: 20px 0;
}

.screenshot {
  display: block;
  width: 100%;
  max-width: 360px;
  margin: 20px auto;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(26, 26, 46, 0.16);
}

ol {
  padding-left: 20px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 16px 0;
}

.platform-card {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px;
}

.platform-card h3 {
  margin-top: 0;
}

.platform-card p {
  font-size: 14px;
}

.platform-card.highlight {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.badge {
  display: inline-block;
  background: #fff7ed;
  color: #c2610a;
  border: 1px solid #fdba74;
  border-radius: 12px;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
}