:root {
  --font-sans: 'Plus Jakarta Sans', system-ui, sans-serif;
  --color-primary-50: #eef2ff;
  --color-primary-200: #c7d2fe;
  --color-primary-500: #6366f1;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-brand-navy: #1a1f36;
  --color-gray-100: #f5f5f4;
  --color-gray-200: #e7e5e4;
  --color-gray-300: #d6d3d1;
  --color-gray-400: #a8a29e;
  --color-gray-500: #78716c;
  --color-gray-900: #1c1917;
  --color-surface: #ffffff;
  --color-background: #f8f8f6;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(28, 25, 23, 0.06), 0 1px 2px rgba(28, 25, 23, 0.04);
  --shadow-md: 0 4px 8px -1px rgba(28, 25, 23, 0.08), 0 2px 4px -2px rgba(28, 25, 23, 0.04);
  --shadow-accent: 0 4px 16px rgba(99, 102, 241, 0.2);
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--color-gray-900);
  background:
    radial-gradient(circle at 1px 1px, var(--color-gray-200) 1px, transparent 0),
    var(--color-background);
  background-size: 24px 24px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 64px;
  background: var(--color-brand-navy);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.headerInner {
  height: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logoGroup {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logoMark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-500);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.headerTitle {
  color: #fff;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.headerTag {
  color: rgba(255, 255, 255, 0.45);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 12px;
  font-weight: 600;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 42px 24px;
  min-height: calc(100vh - 64px - 56px);
}

.hero {
  text-align: center;
  margin-bottom: 28px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-200);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary-700);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.badgeDot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary-500);
}

h1 {
  margin: 0;
  font-size: clamp(30px, 4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.subtitle {
  margin: 12px auto 0;
  color: var(--color-gray-500);
  max-width: 640px;
  line-height: 1.75;
}

.card {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 249, 252, 0.96)),
    var(--color-surface);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-sm);
}

.meta {
  margin: 0 0 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.metaItem {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: 12px 14px;
  background: var(--color-surface);
}

.meta dt {
  font-size: 12px;
  color: var(--color-gray-500);
}

.meta dd {
  margin: 5px 0 0;
  font-size: 16px;
  font-weight: 700;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.button,
.ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  transition: 150ms ease;
}

.button {
  background: var(--color-primary-600);
  color: #fff;
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.button:hover {
  background: var(--color-primary-700);
  text-decoration: none;
  box-shadow: var(--shadow-accent);
}

.ghost {
  background: #fff;
  color: #44403c;
  border: 1px solid var(--color-gray-300);
}

.ghost:hover {
  border-color: var(--color-primary-200);
}

.hint {
  margin: 14px 0 0;
  color: var(--color-gray-500);
  font-size: 14px;
  text-align: center;
}

.changelog {
  max-width: 760px;
  margin: 22px auto 0;
}

.changelogHeader h2 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.02em;
}

.changelogHeader p {
  margin: 8px 0 16px;
  color: var(--color-gray-500);
}

.changelogContent {
  display: grid;
  gap: 12px;
}

.changelogLoading {
  margin: 0;
  padding: 16px;
  border: 1px dashed var(--color-gray-300);
  border-radius: var(--radius-xl);
  color: var(--color-gray-500);
  background: #fff;
}

.releaseCard {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  background: #fff;
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.releaseCard header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-gray-100);
  margin-bottom: 10px;
}

.releaseHeader {
  align-items: center;
}

.releaseTitle {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.releaseCard h3 {
  margin: 0;
  font-size: 20px;
}

.releaseCard header span {
  color: var(--color-gray-500);
  font-size: 13px;
}

.releaseToggle {
  border: 1px solid var(--color-gray-300);
  background: #fff;
  color: #44403c;
  border-radius: var(--radius-lg);
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
}

.releaseToggle:hover {
  border-color: var(--color-primary-200);
}

.releaseBody {
  display: none;
}

.releaseCard.is-open .releaseBody {
  display: block;
}

.category + .category {
  margin-top: 10px;
}

.category h4 {
  margin: 0 0 6px;
  font-size: 14px;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.category ul {
  margin: 0;
  padding-left: 18px;
  color: #44403c;
  line-height: 1.55;
}

.category li + li {
  margin-top: 4px;
}

.emptyCategory {
  margin: 0;
  color: var(--color-gray-500);
  font-size: 14px;
}

.footer {
  border-top: 1px solid var(--color-gray-200);
  background: var(--color-surface);
}

.footerInner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.footerBrand {
  color: var(--color-gray-500);
  font-size: 14px;
  font-weight: 600;
}

.footerDivider {
  width: 1px;
  height: 14px;
  background: var(--color-gray-300);
}

.footerText {
  color: var(--color-gray-400);
  font-size: 14px;
}

@media (max-width: 760px) {
  .headerTag {
    display: none;
  }

  .container {
    padding: 28px 16px;
  }

  .card {
    padding: 20px;
  }

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

  .actions {
    flex-direction: column;
  }

  .button,
  .ghost {
    width: 100%;
  }

  .footerInner {
    flex-direction: column;
    gap: 6px;
  }

  .footerDivider {
    display: none;
  }

  .releaseCard header {
    flex-direction: column;
    align-items: flex-start;
  }

  .releaseTitle {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }
}