:root {
  --bg0: #070b14;
  --bg1: #101a2c;
  --ink: #e8eef8;
  --muted: #8fa3c1;
  --accent: #2fe0c2;
  --accent-2: #5b8cff;
  --danger: #ff5d7a;
  --warn: #ffc857;
  --panel: rgba(14, 22, 38, 0.82);
  --line: rgba(255, 255, 255, 0.1);
  --font-display: "Orbitron", sans-serif;
  --font-ui: "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", sans-serif;
  --max: 1080px;
  color: var(--ink);
  font-family: var(--font-ui);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg0);
}

body {
  background:
    radial-gradient(1100px 560px at 12% -10%, rgba(47, 224, 194, 0.12), transparent 58%),
    radial-gradient(900px 520px at 92% 8%, rgba(91, 140, 255, 0.14), transparent 55%),
    linear-gradient(180deg, #070b14, #0c1424 42%, #070b14);
  color: var(--ink);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #7ff3e0;
}

img {
  max-width: 100%;
  height: auto;
}

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  z-index: 20;
  padding: 8px 12px;
  background: var(--accent);
  color: #041018;
  font-weight: 700;
}

.skip:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 8;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.78);
  backdrop-filter: blur(14px);
}

.site-header-inner,
.site-footer-inner,
.wrap {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  font-family: var(--font-display);
  letter-spacing: 0.12em;
  font-weight: 800;
}

.brand span {
  color: var(--accent);
}

.brand img {
  width: 32px;
  height: 32px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 4px 14px;
}

.nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.nav a[aria-current="page"],
.nav a:hover {
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
  padding: 56px 0 28px;
}

.kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: 0.04em;
}

#windows {
  scroll-margin-top: 88px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05;
}

.hero h1 span {
  color: var(--accent);
}

.lede {
  margin: 16px 0 24px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
  max-width: 38em;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}

.btn.primary {
  background: linear-gradient(180deg, #3ae8ca, #1bb8a0);
  border-color: transparent;
  color: #041018;
}

.btn.primary:hover {
  color: #041018;
  filter: brightness(1.06);
}

.hero-mark {
  display: grid;
  place-items: center;
  min-height: 280px;
}

.hero-mark img {
  width: min(72vw, 280px);
  height: auto;
  border-radius: 48px;
  box-shadow:
    0 0 0 1px var(--line),
    0 18px 50px rgba(0, 0, 0, 0.4),
    0 0 80px rgba(47, 224, 194, 0.18);
}

.ico {
  flex: 0 0 auto;
  display: block;
}

.section h2,
.prose h2,
.prose h1,
.section h1 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.card h3 {
  display: flex;
  align-items: center;
  gap: 8px;
}

.news-date {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0 8px;
}

.note-card {
  margin: 0;
  padding: 14px 10px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  text-align: center;
}

.note-card svg {
  display: block;
  margin: 0 auto 8px;
}

.note-card figcaption {
  margin: 0;
}

.note-card strong {
  display: block;
  color: var(--ink);
  font-size: 0.95rem;
}

.note-card span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.key-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6em;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(47, 224, 194, 0.14);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 0.82rem;
}

.key-chip.outer {
  background: rgba(255, 93, 122, 0.18);
}

.steps {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0 0 16px;
  list-style: none;
  counter-reset: step;
}

.steps li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: start;
  color: var(--muted);
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(47, 224, 194, 0.14);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.78rem;
}

.section {
  padding: 28px 0 8px;
}

.section h2 {
  margin: 0 0 8px;
  font-size: 1.35rem;
}

.section-lead {
  margin: 0 0 20px;
  color: var(--muted);
  line-height: 1.7;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.card,
.article,
.news-item {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.card {
  padding: 18px 18px 16px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.card p,
.prose p,
.prose li {
  color: var(--muted);
  line-height: 1.75;
}

.card p {
  margin: 0;
}

.news-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.news-item a {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  color: inherit;
  text-decoration: none;
}

.news-item a:hover {
  background: rgba(47, 224, 194, 0.05);
}

.news-date {
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.news-item h3,
.article h1 {
  margin: 0;
}

.news-item p {
  margin: 0;
  color: var(--muted);
}

.article {
  padding: 28px 24px 32px;
}

.article h1 {
  margin: 8px 0 16px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.prose h2 {
  margin: 28px 0 8px;
  font-size: 1.1rem;
}

.prose ul,
.prose ol {
  padding-left: 1.2em;
}

.prose li + li {
  margin-top: 6px;
}

.note {
  margin: 18px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--warn);
  background: rgba(255, 200, 87, 0.08);
  color: var(--ink);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  color: var(--muted);
  font-weight: 600;
}

.site-footer {
  margin-top: 48px;
  padding: 28px 0 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer-inner {
  display: grid;
  gap: 8px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.site-footer a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--ink);
}

@media (max-width: 800px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 28px;
  }

  .hero-mark {
    min-height: 0;
    order: -1;
  }

  .hero-mark img {
    width: min(48vw, 180px);
    border-radius: 32px;
  }

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

  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
  }
}