/* SD Systems — minimal Electron-style static site */
:root {
  --bg: #0B0F14;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-strong: rgba(255, 255, 255, 0.08);
  --text: #E5E7EB;
  --muted: #9CA3AF;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #6EE7F9;
  --accent2: #A78BFA;
  --accent3: #F59E0B;
  --shadow: 0 10px 30px rgba(0,0,0,0.45);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 800px at 10% -10%, rgba(110,231,249,0.10), transparent 60%),
              radial-gradient(1000px 600px at 90% 10%, rgba(167,139,250,0.08), transparent 60%),
              var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji", sans-serif;
  line-height: 1.6;
}

.container { width: min(1100px, 92vw); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(16px);
  background: linear-gradient(180deg, rgba(11,15,20,0.85), rgba(11,15,20,0.35));
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.logo { width: 28px; height: 28px; filter: drop-shadow(0 4px 10px rgba(110,231,249,0.25)); }
.brand-text { font-weight: 700; letter-spacing: 0.2px; }

.nav a {
  color: var(--muted);
  margin-left: 18px;
  text-decoration: none;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 12px;
  transition: 150ms ease;
  font-weight: 500;
}
.nav a:hover, .nav a.active {
  color: var(--text);
  border-color: var(--border);
  background: var(--panel);
}

.hero { padding: 58px 0 26px; }
.hero h1 {
  font-size: clamp(32px, 4.5vw, 54px);
  line-height: 1.1;
  margin: 0 0 10px 0;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { color: var(--muted); font-size: clamp(16px, 2.2vw, 18px); max-width: 70ch; }

.kbd { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px;
  padding: 3px 8px; border-radius: 10px; border: 1px solid var(--border); background: var(--panel); color: var(--text); }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  background: linear-gradient(180deg, var(--panel), transparent),
              radial-gradient(600px 200px at 0% -40%, rgba(110,231,249,0.10), transparent 60%),
              radial-gradient(600px 200px at 100% -40%, rgba(167,139,250,0.10), transparent 60%);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
  transition: transform 160ms ease, border-color 160ms ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); }

.section { margin: 28px 0 40px; }
.section h2 { margin: 0 0 8px 0; font-size: 22px; letter-spacing: 0.1px; }
.section p.lead { color: var(--muted); margin-top: 0; }

.badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.badge { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px; padding: 6px 10px; border-radius: 999px; border: 1px solid var(--border); background: var(--panel); }

.table { width: 100%; border-collapse: collapse; overflow: hidden; border-radius: 14px; border: 1px solid var(--border); }
.table th, .table td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; }
.table th { color: var(--muted); font-weight: 600; }
.table tr:last-child td { border-bottom: none; }

.cta { display: inline-flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: 14px;
  background: linear-gradient(90deg, var(--accent), var(--accent2)); color: #0B0F14; font-weight: 700; text-decoration: none; box-shadow: var(--shadow); }
.cta:hover { filter: brightness(1.05); }

.site-footer { border-top: 1px solid var(--border); margin-top: 40px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 0 38px; }
.footer-links a { color: var(--muted); text-decoration: none; margin-left: 14px; }
.footer-links a:hover { color: var(--text); }