:root {
  --page-bg: radial-gradient(circle at top, #f8fbff 0%, #eef3f8 48%, #e9eef4 100%);
  --panel-bg: rgba(255, 255, 255, 0.84);
  --panel-border: rgba(13, 31, 54, 0.08);
  --title: #102030;
  --text: #425164;
  --muted: #6e7f93;
  --accent: #1768e5;
  --accent-soft: rgba(23, 104, 229, 0.1);
  --accent-strong: #0d4fc0;
  --radius-xl: 28px;
  --radius-lg: 18px;
  --shadow-soft: 0 24px 60px rgba(16, 32, 48, 0.08);
  --max-width: 1120px;
  --font-sans: "IBM Plex Sans", "SF Pro Display", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--page-bg);
  color: var(--text);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.26) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.16;
}

a {
  color: inherit;
}

#app {
  position: relative;
  z-index: 1;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.release-page,
.history-shell,
.detail-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.release-overview,
.downloads,
.history-header,
.history-item,
.detail-header,
.detail-downloads,
.release-notes {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  animation: fadeUp 420ms ease both;
}

.release-overview,
.downloads,
.history-header,
.detail-header,
.detail-downloads,
.release-notes {
  padding: 32px;
}

.release-overview,
.downloads,
.detail-downloads,
.release-notes {
  margin-bottom: 24px;
}

.release-overview__head,
.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow,
.section-label,
.platform-panel__eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 14px;
  margin: 12px 0 18px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 700;
}

.release-overview h1,
.history-header h1,
.detail-header h1 {
  margin: 0;
  color: var(--title);
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero__summary,
.history-copy,
.detail-summary,
.section-copy,
.platform-panel__summary,
.history-item .summary,
.release-notes p {
  color: var(--muted);
  line-height: 1.75;
}

.hero__summary,
.history-copy,
.detail-summary {
  max-width: 60ch;
  font-size: 1.04rem;
}

.hero__meta,
.detail-meta,
.history-item__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.94rem;
}

.hero__cta,
.detail-link,
.back-link,
.history-link--subtle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition:
    transform 180ms ease,
    color 180ms ease,
    opacity 180ms ease;
}

.hero__cta,
.detail-link,
.back-link {
  color: var(--accent);
  font-weight: 700;
}

.hero__cta {
  margin-top: 22px;
}

.history-link--subtle {
  color: var(--muted);
  opacity: 0.86;
}

.history-link--subtle:hover,
.hero__cta:hover,
.detail-link:hover,
.back-link:hover {
  transform: translateY(-1px);
}

.section-heading h2,
.detail-downloads h2,
.release-notes h2 {
  margin: 0;
  color: var(--title);
  font-size: 1.34rem;
}

.section-copy {
  margin: 12px 0 0;
}

.platform-tabs {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.platform-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.platform-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  cursor: pointer;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.platform-toggle:checked + .platform-tab {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
  transform: translateY(-1px);
}

.platform-panel {
  display: none;
  padding: 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.92);
  animation: fadeUp 220ms ease both;
}

.platform-panel h3 {
  margin: 0;
  color: var(--title);
  font-size: 1.2rem;
}

.platform-panel__summary {
  margin: 10px 0 0;
}

.platform-panel__file {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(23, 104, 229, 0.08);
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
}

.download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  margin-top: 18px;
  padding: 0 18px;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.download-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(23, 104, 229, 0.18);
}

.platform-empty {
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--panel-border);
  color: var(--muted);
}

#home-darwin-aarch64:checked ~ [data-target="home-darwin-aarch64"],
#home-darwin-x86_64:checked ~ [data-target="home-darwin-x86_64"],
#home-windows-x86_64:checked ~ [data-target="home-windows-x86_64"],
#detail-darwin-aarch64:checked ~ [data-target="detail-darwin-aarch64"],
#detail-darwin-x86_64:checked ~ [data-target="detail-darwin-x86_64"],
#detail-windows-x86_64:checked ~ [data-target="detail-windows-x86_64"] {
  display: block;
}

.release-list {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.history-item {
  padding: 24px;
}

.history-item .version {
  color: var(--title);
  font-weight: 700;
}

.history-item .summary {
  margin: 12px 0 14px;
}

.detail-header {
  display: block;
}

.back-link {
  margin-bottom: 18px;
}

.release-notes h2 {
  margin-bottom: 14px;
}

.release-notes p {
  margin: 0 0 16px;
}

.release-notes pre {
  overflow-x: auto;
  padding: 16px;
  border-radius: 16px;
  background: rgba(16, 32, 48, 0.05);
}

@media (max-width: 900px) {
  .release-page,
  .history-shell,
  .detail-shell {
    padding: 28px 16px 56px;
  }

  .release-overview,
  .downloads,
  .history-header,
  .history-item,
  .detail-header,
  .detail-downloads,
  .release-notes {
    padding: 22px;
  }

  .release-overview__head,
  .section-heading {
    flex-direction: column;
  }

  .platform-tab {
    width: 100%;
    justify-content: flex-start;
  }
}