:root {
  --bg: #0f1117;
  --bg-elevated: #161922;
  --surface: #1c2030;
  --text: #e8ecf3;
  --text-muted: #9aa3b8;
  --accent: #b794f4;
  --accent-strong: #a78bfa;
  --accent-bg: #5b21b6;
  --accent-bg-strong: #4c1d95;
  --on-accent: #ffffff;
  --border: #2a2f42;
  --max-width: 1080px;
  --radius: 12px;
}

* { box-sizing: border-box; }

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 600;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.brand-name {
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

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

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
  background: radial-gradient(
    circle at 50% 0%,
    rgba(167, 139, 250, 0.12),
    transparent 60%
  );
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  margin-bottom: 1.75rem;
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.25);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 0 2rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  transition: transform 0.05s ease, background 0.15s ease, color 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent-bg);
  color: var(--on-accent);
}
.btn-primary:hover {
  background: var(--accent-bg-strong);
  color: var(--on-accent);
}

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

/* Sections */
section { padding: 4rem 0; }

section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 2rem;
  letter-spacing: -0.01em;
}

.features { background: var(--bg-elevated); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.feature h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--accent);
}

.feature p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.97rem;
}

/* How it works */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding: 1.25rem 1.5rem 1.25rem 3.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 1.25rem;
  top: 1.1rem;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-bg);
  color: var(--on-accent);
  border-radius: 50%;
  font-weight: 700;
}

.steps strong {
  display: block;
  margin-bottom: 0.2rem;
}

/* Download */
.download {
  text-align: center;
  background: var(--bg-elevated);
}

.download-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.download p {
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  max-width: 520px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Small screens */
@media (max-width: 540px) {
  .site-nav { display: none; }
  .hero { padding: 3.5rem 0 3rem; }
  section { padding: 3rem 0; }
}