:root {
  --bg: #0b1120;
  --surface: #111827;
  --surface-2: #1e293b;
  --border: #334155;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #10b981;
  --accent-hover: #059669;
  --blue: #38bdf8;
  --amber: #f59e0b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
header.topbar {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 17, 32, 0.92);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  flex-wrap: wrap;
  gap: 12px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}
.brand-badge {
  background: linear-gradient(135deg, #10b981, #0284c7);
  color: #fff;
  font-weight: 800;
  padding: 4px 9px;
  border-radius: 7px;
  font-size: 0.85rem;
}
.nav-links { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; font-size: 0.92rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.93rem;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none !important;
  transition: all 0.15s ease;
}
.btn-primary { background: var(--accent); color: #04130d; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-outline { background: var(--surface-2); color: var(--text); border-color: var(--border); }
.btn-outline:hover { border-color: var(--blue); }
.hero {
  padding: 56px 0 36px;
  text-align: center;
}
.pill {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.14);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.18;
  margin: 0 auto 16px;
  max-width: 900px;
}
.hero p {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 760px;
  margin: 0 auto 26px;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.sandbox-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  margin: 18px 0 44px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
}
.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
  margin-bottom: 18px;
}
.tab-btn {
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 8px 13px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
}
.tab-btn.active {
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
  border-color: #10b981;
}
.sandbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 860px) {
  .sandbox-grid { grid-template-columns: 1fr; }
}
.pane-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
}
textarea.code-box, pre.code-box {
  width: 100%;
  min-height: 310px;
  max-height: 420px;
  background: #070b14;
  color: #e2e8f0;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.81rem;
  line-height: 1.45;
  overflow: auto;
  margin: 0;
  white-space: pre;
}
.sandbox-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.upsell-banner {
  margin-top: 14px;
  padding: 13px 16px;
  border-radius: 10px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fcd34d;
  display: none;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.9rem;
}
.status-chip {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 700;
}
.status-ok { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.status-err { background: rgba(239, 68, 68, 0.2); color: #f87171; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 18px;
  margin: 24px 0 48px;
}
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.tool-card h3 { margin: 8px 0 8px; font-size: 1.1rem; }
.tool-card p { color: var(--muted); font-size: 0.91rem; margin: 0 0 16px; }
.tag-row { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.tag {
  font-size: 0.73rem;
  padding: 2px 8px;
  border-radius: 5px;
  background: var(--surface-2);
  color: var(--blue);
  border: 1px solid var(--border);
}
.card-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; }
.section-title { font-size: 1.65rem; margin: 40px 0 10px; }
.section-sub { color: var(--muted); margin: 0 0 20px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 12px;
}
.faq-item h4 { margin: 0 0 6px; color: #f1f5f9; }
.faq-item p { margin: 0; color: var(--muted); font-size: 0.93rem; }
footer {
  border-top: 1px solid var(--border);
  margin-top: 60px;
  padding: 32px 0;
  color: var(--muted);
  font-size: 0.86rem;
}