:root {
  --bg: #f7f7f7;
  --surface: #ffffff;
  --surface-alt: #eeeeee;
  --text: #111111;
  --muted: #5f5f5f;
  --accent: #000000;
  --accent-dark: #000000;
  --accent-soft: #e2e2e2;
  --line: #d5d5d5;
  --warning: #4a4a4a;
  --max-width: 1120px;
  --radius: 8px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

img,
svg {
  max-width: 100%;
}

.container {
  width: min(100% - 32px, var(--max-width));
  margin-inline: auto;
}

.narrow {
  max-width: 820px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: var(--text);
  color: white;
  padding: 10px 14px;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 16px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 247, 247, 0.95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 700;
}

.brand-logo {
  width: 46px;
  height: 46px;
  display: block;
  flex: 0 0 auto;
  border-radius: 50%;
  object-fit: contain;
  background: white;
  box-shadow: 0 0 0 1px var(--line);
}

.brand-text {
  max-width: 300px;
  line-height: 1.2;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-menu a {
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--muted);
  font-weight: 650;
  text-decoration: none;
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--text);
}

.nav-menu .nav-contact {
  color: var(--accent-dark);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}

.nav-toggle-line,
.nav-toggle-line::before,
.nav-toggle-line::after {
  display: block;
  width: 18px;
  height: 2px;
  margin-inline: auto;
  background: var(--text);
  content: "";
}

.nav-toggle-line::before {
  transform: translateY(-6px);
}

.nav-toggle-line::after {
  transform: translateY(4px);
}

.hero {
  padding: 92px 0 78px;
  background:
    linear-gradient(135deg, rgba(232, 232, 232, 0.9), rgba(247, 247, 247, 0.35)),
    radial-gradient(circle at 82% 18%, rgba(0, 0, 0, 0.08), transparent 34%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 48px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 0.84rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  overflow-wrap: normal;
  word-break: normal;
}

h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  line-height: 1.02;
}

h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.6rem);
  line-height: 1.12;
}

h3 {
  margin: 0;
  font-size: 1.13rem;
  line-height: 1.25;
}

p {
  margin: 0;
}

.hero-lede {
  margin-top: 22px;
  max-width: 740px;
  color: #444444;
  font-size: clamp(1.08rem, 2vw, 1.32rem);
}

.button-row,
.centered-action,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button-row {
  margin-top: 30px;
}

.button,
.button:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 750;
  text-decoration: none;
}

.button-primary {
  background: var(--accent);
  color: white;
}

.button-primary:hover {
  background: var(--accent-dark);
}

.button-secondary {
  background: white;
  border-color: var(--line);
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--accent);
}

.button.is-disabled {
  cursor: not-allowed;
  opacity: 0.72;
}

.hero-panel {
  min-width: 0;
}

.hero-brand-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.hero-brand-card img {
  display: block;
  width: 100%;
  aspect-ratio: 24 / 10;
  object-fit: contain;
  padding: 22px;
  background: white;
}

.metric-grid {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.metric {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.metric strong {
  font-size: 1.1rem;
  font-weight: 750;
}

.metric span {
  color: var(--muted);
  flex: 0 0 auto;
  font-weight: 800;
  text-align: right;
}

.data-lines {
  display: grid;
  gap: 10px;
  padding-top: 8px;
}

.data-lines span {
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-soft), transparent);
}

.data-lines span:nth-child(2) {
  width: 82%;
}

.data-lines span:nth-child(3) {
  width: 68%;
}

.data-lines span:nth-child(4) {
  width: 88%;
}

.section,
.page-hero {
  padding: 72px 0;
}

.page-hero {
  background: linear-gradient(135deg, var(--surface-alt), var(--bg));
}

.page-hero p:not(.eyebrow) {
  margin-top: 18px;
  color: #444444;
  font-size: 1.18rem;
}

.section-muted {
  background: var(--surface-alt);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
  gap: 40px;
  align-items: start;
}

.section-lede,
.section-heading p {
  color: var(--muted);
  font-size: 1.08rem;
}

.section-heading {
  max-width: 790px;
  margin-bottom: 32px;
}

.section-heading p:not(.eyebrow) {
  margin-top: 14px;
}

.compact {
  max-width: 720px;
}

.feature-grid,
.contribution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

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

.feature-card,
.download-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.feature-card p,
.download-card p {
  margin-top: 10px;
  color: var(--muted);
}

.download-card {
  display: flex;
  min-height: 250px;
  flex-direction: column;
  align-items: flex-start;
}

.download-card .button {
  margin-top: auto;
}

.tag,
.status {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-bottom: 12px;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 800;
}

.status {
  margin-bottom: 0;
}

.status.development {
  background: #dcdcdc;
  color: var(--warning);
}

.accomplishment-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.check-list,
.plain-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list {
  display: grid;
  gap: 12px;
}

.check-list li {
  position: relative;
  padding-left: 30px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  content: "✓";
  font-size: 0.78rem;
  font-weight: 900;
}

.plain-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  color: var(--muted);
}

.callout,
.contact-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 36px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}

.callout p,
.contact-panel p {
  margin-top: 8px;
  color: var(--muted);
}

.focus-list {
  display: grid;
  gap: 16px;
}

.focus-list article,
.roadmap-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}

.focus-list article h3,
.focus-list article p {
  grid-column: 2;
}

.focus-number,
.roadmap-marker {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 900;
}

.focus-list p,
.roadmap-item p {
  margin-top: 10px;
  color: var(--muted);
}

.centered-action {
  justify-content: center;
  margin-top: 28px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}

table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

th,
td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  background: #f3f3f3;
  color: var(--text);
}

tr:last-child td {
  border-bottom: 0;
}

.roadmap {
  display: grid;
  gap: 20px;
}

.participant-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.participant-list span {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  color: #444444;
  font-weight: 650;
}

.contact-panel {
  align-items: flex-start;
}

.contact-actions {
  flex-shrink: 0;
}

.site-footer {
  padding: 42px 0 22px;
  background: #111111;
  color: white;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
}

.footer-grid p {
  margin-top: 8px;
  max-width: 640px;
  color: rgba(255, 255, 255, 0.75);
}

.footer-grid div:last-child {
  display: grid;
  gap: 8px;
}

.footer-grid a {
  color: white;
  text-decoration-color: rgba(255, 255, 255, 0.45);
}

.footer-bottom {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
}

@media (max-width: 820px) {
  .nav {
    min-height: 64px;
  }

  .brand-text {
    max-width: 210px;
    font-size: 0.9rem;
  }

  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-menu {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: white;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .hero {
    padding: 58px 0;
  }

  .hero-grid,
  .split,
  .feature-grid,
  .download-grid,
  .contribution-grid,
  .accomplishment-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section,
  .page-hero {
    padding: 54px 0;
  }

  .focus-list article,
  .roadmap-item {
    grid-template-columns: 1fr;
  }

  .focus-list article h3,
  .focus-list article p {
    grid-column: auto;
  }

  .callout,
  .contact-panel {
    align-items: stretch;
    flex-direction: column;
  }

  .contact-actions {
    flex-shrink: 1;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(100% - 24px, var(--max-width));
  }

  .brand-logo {
    width: 38px;
    height: 38px;
  }

  .brand-text {
    max-width: 176px;
  }

  .button-row,
  .contact-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .metric {
    flex-direction: column;
    gap: 2px;
  }

  .metric span {
    text-align: left;
  }
}