:root {
  --bg: #ffffff;
  --fg: #1a1a2e;
  --muted: #5b5b73;
  --accent: #5b4cff;
  --accent-dark: #4537d6;
  --card: #f6f6fb;
  --border: #e7e7f0;
  --maxw: 880px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Header */
header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--fg); }
.brand span { color: var(--accent); }
.nav-links a { margin-left: 22px; color: var(--muted); font-weight: 500; }

/* Hero */
.hero { padding: 84px 0 64px; text-align: center; }
.hero h1 { font-size: 2.6rem; line-height: 1.15; margin: 0 0 18px; letter-spacing: -0.02em; }
.hero p { font-size: 1.2rem; color: var(--muted); max-width: 620px; margin: 0 auto 32px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 13px 26px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; }
.btn.secondary { background: transparent; color: var(--accent); border: 1px solid var(--border); margin-left: 10px; }

/* Features */
.section { padding: 56px 0; }
.section h2 { font-size: 1.8rem; text-align: center; margin: 0 0 40px; letter-spacing: -0.01em; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
}
.feature h3 { margin: 0 0 8px; font-size: 1.1rem; }
.feature p { margin: 0; color: var(--muted); font-size: 0.96rem; }

/* Steps */
.steps { counter-reset: step; max-width: 620px; margin: 0 auto; }
.step { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 22px; }
.step .num {
  flex: none;
  width: 32px; height: 32px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.step h3 { margin: 2px 0 4px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); }

/* Content pages */
.content { padding: 56px 0 72px; }
.content h1 { font-size: 2rem; margin: 0 0 8px; }
.content .updated { color: var(--muted); margin: 0 0 32px; font-size: 0.92rem; }
.content h2 { font-size: 1.25rem; margin: 36px 0 10px; }
.content p, .content li { color: #34344a; }
.content ul { padding-left: 22px; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 32px 0; color: var(--muted); font-size: 0.92rem; }
.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.foot a { color: var(--muted); margin-right: 18px; }

@media (max-width: 680px) {
  .hero h1 { font-size: 2rem; }
  .grid { grid-template-columns: 1fr; }
  .nav-links a { margin-left: 14px; }
  .btn.secondary { margin-left: 0; margin-top: 10px; }
}