/* Estilos simples e responsivos */
:root {
  --bg: #0b0e14;
  --bg-alt: #11151d;
  --fg: #e6e6e6;
  --muted: #b8c0cc;
  --primary: #5cc8ff;
  --accent: #6df7c1;
  --border: #1d2330;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--fg);
  background: linear-gradient(180deg, var(--bg), var(--bg-alt));
}

header {
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; backdrop-filter: blur(8px);
  background: rgba(11,14,20,0.9);
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.row { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }

.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--fg); }
.brand-logo { width: 32px; height: 32px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), var(--accent)); box-shadow: 0 0 0 2px #000 inset; }
.brand-title { font-weight: 700; letter-spacing: .2px; }

nav a { color: var(--muted); text-decoration: none; margin-left: 16px; }
nav a:hover { color: var(--fg); }

.hero { padding: 56px 0 24px; text-align: center; }
.hero h1 { font-size: clamp(28px, 4vw, 44px); margin: 0 0 12px; }
.hero p { color: var(--muted); margin: 8px 0; font-size: 18px; }
.cta { display: inline-flex; gap: 12px; margin-top: 20px; }
.btn { padding: 10px 16px; border-radius: 8px; text-decoration: none; font-weight: 600; border: 1px solid var(--border);
  color: var(--fg); background: #161b26; }
.btn.primary { background: linear-gradient(135deg, var(--primary), #3fa7ff); color: #03101a; border-color: transparent; }
.btn.secondary { background: #0f141e; }
.btn:hover { filter: brightness(1.06); }

.section { padding: 32px 0; border-top: 1px solid var(--border); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 16px; }
.card { background: #0f141e; border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.list { margin: 0; padding-left: 18px; color: var(--muted); }

footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); text-align: center; }

code, pre { background: #0d121b; color: #d7efff; border-radius: 6px; border: 1px solid var(--border); }
pre { padding: 12px; overflow: auto; }
code { padding: 2px 6px; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }

.muted { color: var(--muted); }
.kbd { border: 1px solid var(--border); padding: 2px 6px; border-radius: 6px; background: #0f141e; }