/* ========== Reset ringan ========== */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { text-decoration: none; }

/* ========== Theme ========== */
:root{
  --bg: #0b0f17;
  --panel: #111827;
  --panel-2: #0f172a;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --primary: #22c55e;
  --primary-100: #86efac33;
  --border: #1f2937;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 18px;
}

body{
  background: radial-gradient(1200px 600px at 20% -10%, #0d1422 0%, #060a11 60%), var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
}

.container{ width: min(1100px, 92%); margin-inline: auto; }

/* header */
.site-header{
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(130%) blur(8px);
  background: #060a11a6;
  border-bottom: 1px solid var(--border);
}
.site-header .container{
  display: flex; align-items: center; justify-content: space-between; padding: 14px 0;
}
.brand{ display: flex; gap: 10px; align-items: center; color: var(--text); font-weight: 700; }
.logo{ width: 28px; height: 28px; }

.nav a{ color: var(--muted); margin-left: 16px; font-weight: 600; }
.nav a:hover{ color: var(--text); }

/* hero */
.hero{ padding: 56px 0 24px; }
.hero-inner{ display: grid; grid-template-columns: 1.2fr .8fr; gap: 28px; align-items: center; }
.hero h1{ font-size: clamp(28px, 4vw, 40px); margin: 6px 0 6px; }
.hero p{ color: var(--muted); margin: 0 0 18px; }
.cta{ display: flex; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }

.btn{ display:inline-flex; align-items:center; justify-content:center; padding:12px 16px; border-radius: 12px; border:1px solid var(--border); font-weight:700; }
.btn.primary{ background: var(--primary); color: #052e15; border-color: #16a34a; box-shadow: var(--shadow); }
.btn.primary:hover{ filter: brightness(1.05); }
.btn.ghost{ background: transparent; color: var(--text); }
.btn.block{ display:flex; width:100%; margin-top: 10px; }

.checks{ display:flex; gap:10px; flex-wrap:wrap; color: var(--muted); }
.check{ background: var(--panel); border:1px solid var(--border); padding:6px 10px; border-radius: 12px; }

.hero-media .card{
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-header{ padding: 12px 14px; border-bottom: 1px solid var(--border); font-weight: 700; }
.card-body{ padding: 14px; }
.meta{ list-style: none; padding: 0; margin: 0; color: var(--muted); }
.meta li{ margin: 4px 0; }

/* sections */
.features{ padding: 30px 0 8px; }
.grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.feature{ background: var(--panel); border:1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.feature h3{ margin: 6px 0; }

.howto, .contact{ padding: 34px 0; }
.howto ol{ margin: 0; padding-left: 18px; }

.site-footer{ border-top: 1px solid var(--border); padding: 18px 0; color: var(--muted); }

/* responsive */
@media (max-width: 900px){
  .hero-inner{ grid-template-columns: 1fr; }
  .grid{ grid-template-columns: 1fr; }
}