:root {
  --bg: #0d1a1c;
  --bg2: #0a1416;
  --panel: #11242a;
  --text: #e6f1f3;
  --muted: #8fa9ae;
  --brand: #2fe28a;
  --brand2: #7cf5c8;
  --border: #17323a;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 800px at 20% -10%, #163038 0%, transparent 60%),
    radial-gradient(1000px 700px at 100% 20%, #12262a 0%, transparent 55%), var(--bg);
  color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", system-ui,
    Segoe UI, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100%;
}

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

/* -------- nav -------- */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 32px;
  max-width: 1180px;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}
.brand img {
  border-radius: 50%;
}
.nav nav a {
  margin-left: 22px;
  color: var(--muted);
  font-weight: 500;
}
.nav nav a:hover {
  color: var(--text);
  text-decoration: none;
}

/* -------- hero -------- */
.hero {
  text-align: center;
  padding: 60px 24px 90px;
  max-width: 900px;
  margin: 0 auto;
}
.hero-icon {
  border-radius: 50%;
  box-shadow: var(--shadow);
  margin-bottom: 28px;
}
.hero h1 {
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  font-weight: 800;
}
.grad {
  background: linear-gradient(90deg, var(--brand), var(--brand2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tagline {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--muted);
  margin: 0 0 34px;
}

.cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.btn {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 14px 22px;
  border-radius: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  min-width: 240px;
  text-align: left;
}
.btn small {
  font-weight: 400;
  color: var(--muted);
  font-size: 12px;
}
.btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
  border-color: #245660;
}
.btn.primary {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand2) 100%);
  color: #052018;
  border-color: transparent;
  box-shadow: 0 12px 30px rgba(47, 226, 138, 0.25);
}
.btn.primary small {
  color: #073a2a;
}

.fine {
  color: var(--muted);
  font-size: 13px;
  margin-top: 6px;
}

/* -------- features -------- */
.features {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}
.features h2,
.download h2,
.changelog h2 {
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
  margin: 0 0 32px;
  text-align: center;
  font-weight: 800;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.card {
  padding: 22px 20px;
  background: linear-gradient(180deg, rgba(23, 50, 58, 0.55), rgba(17, 36, 42, 0.85));
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: #245660;
}
.card .ico {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(47, 226, 138, 0.12);
  color: var(--brand);
  font-size: 20px;
  margin-bottom: 12px;
}
.card h3 {
  margin: 0 0 6px;
  font-size: 17px;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* -------- download -------- */
.download {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  text-align: center;
}
.download > p {
  color: var(--muted);
  margin-bottom: 28px;
}
.dl-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.dl {
  display: block;
  padding: 22px;
  border-radius: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  text-align: left;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.dl:hover {
  transform: translateY(-2px);
  border-color: var(--brand);
  text-decoration: none;
}
.dl-arch {
  font-weight: 700;
  margin-bottom: 4px;
}
.dl-file {
  color: var(--muted);
  font-size: 13px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  margin-bottom: 14px;
}
.dl-cta {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(47, 226, 138, 0.15);
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
}

/* -------- first launch -------- */
.firstlaunch {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 24px 60px;
}
.firstlaunch h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  text-align: center;
  font-weight: 800;
}
.fl-lead {
  color: var(--muted);
  text-align: center;
  max-width: 720px;
  margin: 0 auto 24px;
}
.fl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}
.fl-card {
  padding: 22px 22px 18px;
  background: linear-gradient(180deg, rgba(23, 50, 58, 0.55), rgba(17, 36, 42, 0.85));
  border: 1px solid var(--border);
  border-radius: 16px;
}
.fl-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
}
.fl-card .pill {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(47, 226, 138, 0.15);
  color: var(--brand);
  font-size: 11px;
  font-weight: 600;
  vertical-align: middle;
}
.fl-card ol {
  margin: 0 0 10px 18px;
  padding: 0;
  color: var(--text);
}
.fl-card ol li {
  margin: 4px 0;
}
.fl-card pre {
  background: #041014;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  overflow-x: auto;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 13px;
  color: var(--brand2);
  margin: 8px 0 10px;
}
.fl-note {
  color: var(--muted);
  font-size: 13px;
  margin: 0;
}

/* -------- changelog -------- */
.changelog {
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}
.log {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 28px;
}
.log h3 {
  margin: 0 0 10px;
  color: var(--brand);
}
.log ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}
.log li {
  margin: 6px 0;
}

/* -------- footer -------- */
footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 30px 24px 60px;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 640px) {
  .nav nav a {
    margin-left: 14px;
    font-size: 14px;
  }
  .hero {
    padding: 24px 20px 60px;
  }
  footer {
    flex-direction: column;
  }
}