:root {
  --bg: #0e0e12;
  --bg-alt: #15151c;
  --card: #1b1b24;
  --border: #2a2a35;
  --text: #e9e9f0;
  --text-dim: #a6a6b5;
  --violet: #8b5cf6;
  --blue: #3b82f6;
  --gradient: linear-gradient(135deg, var(--violet), var(--blue));
}

* { box-sizing: border-box; }

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

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

h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(14, 14, 18, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}
.brand span {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav nav a {
  margin-left: 24px;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.nav nav a:hover { color: var(--text); }

.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px 60px;
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.hero-inner { flex: 1 1 420px; }

.hero h1 {
  font-size: 2.6rem;
  margin: 0 0 16px;
}

.hero p {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 520px;
}

.cta-row {
  display: flex;
  gap: 16px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--gradient);
  color: white;
}
.btn-primary:hover { opacity: 0.92; color: white; }

.btn-secondary {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-secondary:hover { color: var(--text); border-color: var(--violet); }

.btn-large { padding: 16px 32px; font-size: 1.05rem; }

.hero-note {
  margin-top: 18px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.hero-image {
  flex: 1 1 460px;
}
.hero-image img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.features, .privacy, .download, .changelog {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 24px;
}

.features h2, .privacy h2, .download h2, .changelog h2 {
  font-size: 1.8rem;
  margin-bottom: 28px;
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.card p {
  color: var(--text-dim);
  margin: 0;
  font-size: 0.95rem;
}

.privacy {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.privacy p {
  max-width: 700px;
  margin: 0 auto;
  color: var(--text-dim);
}

.download { text-align: center; }
.download p {
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto 28px;
}
.download code {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9rem;
}

.links-row {
  margin-top: 24px;
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 0.9rem;
}
.links-row a { color: var(--text-dim); }
.links-row a:hover { color: var(--violet); }

.changelog {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}
.changelog h2 { text-align: left; }
.changelog ul {
  color: var(--text-dim);
  padding-left: 20px;
}
.changelog li { margin-bottom: 8px; }
.changelog code {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.85rem;
}

.changelog h3 {
  margin: 20px 0 8px;
  font-size: 1rem;
  color: var(--text);
}
.changelog-date {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0;
}
.changelog-loading,
.changelog-error {
  color: var(--text-dim);
  font-style: italic;
}

.footer {
  text-align: center;
  padding: 32px 24px 48px;
  color: var(--text-dim);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding-top: 48px; }
  .hero h1 { font-size: 2rem; }
}