:root {
  --bg: #0d0f12;
  --bg-elev: #15181d;
  --bg-elev-2: #1d2128;
  --border: #262b33;
  --border-strong: #353c47;
  --text: #e7ecf3;
  --text-muted: #8a93a3;
  --accent: #4f8cff;
  --accent-hover: #6aa0ff;
  --success: #3ecf8e;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --radius-lg: 20px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(900px 600px at 12% -10%, rgba(79, 140, 255, 0.12), transparent 60%),
    radial-gradient(700px 500px at 95% 0%, rgba(62, 207, 142, 0.07), transparent 60%),
    var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.muted { color: var(--text-muted); }
.small { font-size: 0.85rem; }
.hidden { display: none !important; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.5px;
  font-size: 1.05rem;
}
.brand img { border-radius: 8px; }
.topbar nav a {
  color: var(--text-muted);
  font-size: 0.92rem;
}
.topbar nav a:hover { color: var(--text); }

main {
  flex: 1;
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 24px 64px;
}

.hero {
  text-align: center;
  padding: 56px 0 40px;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}
.hero .lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 36em;
  margin: 0 auto 22px;
}
.version-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 28px;
}
.pill {
  display: inline-flex;
  align-items: center;
  font-size: 0.85rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 4px 10px;
  border-radius: 999px;
}

.cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: var(--accent);
  color: #fff;
  padding: 16px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1.05rem;
  box-shadow: var(--shadow);
  transition: transform 80ms ease, background 120ms ease;
  margin-bottom: 14px;
}
.cta:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); }
.cta-meta { font-size: 0.78rem; opacity: 0.85; font-weight: 500; margin-top: 4px; }

.platforms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 8px;
}

.platform-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 120ms ease, transform 120ms ease, background 120ms ease;
}
.platform-card.available:hover {
  border-color: var(--border-strong);
  background: var(--bg-elev-2);
  transform: translateY(-1px);
}
.platform-card.unavailable { opacity: 0.55; }

.platform-card .icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elev-2);
  border-radius: 10px;
  margin-bottom: 6px;
  color: var(--text);
}
.platform-card .name {
  font-weight: 600;
  font-size: 1rem;
}
.platform-card .sub {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 8px;
}
.platform-card .filemeta {
  display: flex;
  gap: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}
.platform-card a.dl {
  margin-top: 10px;
  display: inline-block;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}
.platform-card a.dl:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.platform-card .status-na {
  margin-top: 10px;
  padding: 8px 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: 10px;
  text-align: center;
}

.meta {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.meta h2 {
  font-size: 1.1rem;
  margin: 0 0 16px;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.meta details {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
}
.meta summary {
  cursor: pointer;
  font-weight: 500;
  list-style: none;
}
.meta summary::-webkit-details-marker { display: none; }
.meta summary::after {
  content: "+";
  float: right;
  color: var(--text-muted);
  transition: transform 150ms ease;
}
.meta details[open] summary::after { content: "−"; }
.meta details p { margin: 10px 0 4px; color: var(--text-muted); }
.meta code {
  background: var(--bg-elev-2);
  padding: 1px 6px;
  border-radius: 6px;
  font-size: 0.85em;
}

footer {
  padding: 28px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
}
footer a { color: var(--text-muted); }
footer a:hover { color: var(--text); }

@media (max-width: 540px) {
  .hero { padding: 32px 0 24px; }
  .cta { width: 100%; }
}