/* VOID 公式サイト — フォント: Google Fonts（Web ライセンス / 商用利用可のファミリー） */
@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@500;600;700;800&family=Shippori+Mincho+B1:wght@400;600;700&family=Zen+Kaku+Gothic+New:wght@400;500;700&display=swap");

/* VOID 公式サイト（ゲーミング通話）— 軽量・GPU 負荷最小・アニメーションなし */
:root {
  --void-bg: #050608;
  --void-surface: #0c0e12;
  --void-border: rgba(230, 230, 234, 0.12);
  --void-text: #e8e8ec;
  --void-muted: #8a8d96;
  --void-accent: #c8cad2;
  --void-accent-dim: #6e7178;
  --void-teal: #5c8a8a;
  --void-green: #00ff41;
  --void-radius: 8px;
  --void-font: "Zen Kaku Gothic New", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --void-display: "Outfit", system-ui, sans-serif;
  --void-heading: "Shippori Mincho B1", "Hiragino Mincho ProN", serif;
  --void-mono: ui-monospace, "Cascadia Code", "Consolas", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--void-font);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--void-text);
  background: var(--void-bg);
  background-image: radial-gradient(ellipse 120% 80% at 50% -20%, rgba(0, 255, 65, 0.06), transparent 50%);
}

a {
  color: var(--void-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--void-text);
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 999;
  padding: 0.5rem 1rem;
  background: var(--void-surface);
  color: var(--void-text);
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: min(56rem, calc(100% - 2rem));
  margin-inline: auto;
  padding-block: 1.5rem 3rem;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.5rem 1.5rem;
  border-bottom: 1px solid var(--void-border);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand__name {
  margin: 0;
  font-family: var(--void-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--void-green);
  text-shadow: 0 0 18px rgba(0, 255, 65, 0.25);
}

.brand__tag {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--void-muted);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  align-items: center;
}

.site-nav a {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--void-muted);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--void-green);
}

.hero {
  padding-block: 2.5rem 1.5rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--void-heading);
  font-size: clamp(1.35rem, 4vw, 1.95rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.hero__accent {
  color: color-mix(in srgb, var(--void-green) 85%, var(--void-text));
  font-weight: 700;
}

.hero__lead {
  margin: 0;
  max-width: 40rem;
  font-size: 0.92rem;
  color: var(--void-muted);
}

.hero__badge {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.35rem 0.65rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--void-teal);
  border: 1px solid color-mix(in srgb, var(--void-teal) 45%, transparent);
  border-radius: 4px;
  background: rgba(92, 138, 138, 0.08);
}

section {
  margin-top: 2.25rem;
}

section h2 {
  margin: 0 0 0.65rem;
  font-family: var(--void-heading);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--void-text);
}

.section-lead {
  margin: 0 0 1rem;
  font-size: 0.88rem;
  color: var(--void-muted);
  max-width: 44rem;
  line-height: 1.6;
}

.card {
  padding: 1rem 1.1rem;
  border-radius: var(--void-radius);
  border: 1px solid var(--void-border);
  background: var(--void-surface);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 0.75rem;
  border-radius: var(--void-radius);
  border: 1px solid var(--void-border);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  min-width: 280px;
}

.compare-table th,
.compare-table td {
  padding: 0.75rem 0.85rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--void-border);
}

.compare-table thead th {
  background: rgba(0, 0, 0, 0.35);
  color: var(--void-text);
  font-weight: 700;
}

.compare-table tbody th[scope="row"] {
  width: 28%;
  min-width: 7rem;
  color: var(--void-accent);
  font-weight: 600;
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.table-muted {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.72rem;
  color: var(--void-accent-dim);
  font-weight: 400;
}

.table-highlight {
  color: color-mix(in srgb, var(--void-green) 55%, var(--void-text));
  background: rgba(0, 255, 65, 0.04);
}

.download-card {
  margin-top: 0.5rem;
}

.download-meta {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-family: var(--void-mono);
  color: var(--void-muted);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  font-size: 0.88rem;
  font-weight: 800;
  font-family: inherit;
  color: #050608;
  background: var(--void-green);
  border: 1px solid color-mix(in srgb, var(--void-green) 70%, #000);
  border-radius: var(--void-radius);
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0, 255, 65, 0.15);
}

.btn-download:hover {
  filter: brightness(1.06);
  color: #050608;
}

.btn-download:focus-visible {
  outline: 2px solid var(--void-green);
  outline-offset: 3px;
}

.btn-download--disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.download-note {
  margin: 1rem 0 0;
  font-size: 0.75rem;
  color: var(--void-accent-dim);
  max-width: 40rem;
  line-height: 1.5;
}

.download-note code {
  font-family: var(--void-mono);
  font-size: 0.85em;
  padding: 0.1em 0.35em;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.06);
}

.device-grid {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.75rem;
}

.device-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 8rem;
  padding: 1rem;
  border-radius: var(--void-radius);
  border: 1px solid var(--void-border);
  background: var(--void-surface);
}

.device-card__name {
  margin: 0 0 0.35rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--void-text);
}

.device-card__note {
  margin: 0;
  font-size: 0.75rem;
  color: var(--void-muted);
  line-height: 1.45;
}

.device-card__link {
  margin-top: 0.85rem;
  align-self: flex-start;
  display: inline-block;
  padding: 0.45rem 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: #0a0c0f;
  background: color-mix(in srgb, var(--void-accent) 92%, #000);
  border-radius: 6px;
  text-decoration: none;
}

.device-card__link:hover {
  filter: brightness(1.05);
  color: #0a0c0f;
}

.privacy-card p {
  margin: 0 0 0.85rem;
  font-size: 0.86rem;
  color: var(--void-muted);
  max-width: none;
  line-height: 1.65;
}

.privacy-card p:last-child {
  margin-bottom: 0;
}

.site-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--void-border);
  font-size: 0.72rem;
  color: var(--void-accent-dim);
}

@media (max-width: 520px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .compare-table tbody th[scope="row"] {
    width: auto;
  }
}