:root {
  --bg: #020617;
  --panel: #0f172a;
  --panel-2: #111827;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22d3ee;
  --accent-2: #14b8a6;
  --ok: #10b981;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: radial-gradient(circle at top right, #0b1225 0%, var(--bg) 60%);
  color: var(--text);
  font-family: "IBM Plex Sans", "Segoe UI", Helvetica, Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.rail {
  width: 260px;
  border-right: 1px solid var(--border);
  padding: 18px 14px;
  background: rgba(2, 6, 23, 0.72);
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.env-badge {
  display: inline-block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 999px;
  padding: 4px 10px;
  border: 1px solid #2f3f52;
  color: #cbd5e1;
  margin-bottom: 14px;
}

.env-badge.production {
  border-color: #275b70;
  color: #8ee6ff;
}

.env-badge.internal {
  border-color: #3f6d3b;
  color: #98f7a7;
}

.env-badge.demo {
  border-color: #6b4c28;
  color: #ffde9b;
}

.nav-group {
  margin-bottom: 20px;
}

.nav-label {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 10px 8px;
}

.nav-link {
  display: block;
  padding: 8px 10px;
  border-radius: 8px;
  color: #cbd5e1;
  margin-bottom: 4px;
}

.nav-link:hover {
  background: #0b1220;
}

.nav-link.active {
  background: #111827;
  color: #f8fafc;
  border: 1px solid #263244;
}

.main {
  flex: 1;
  padding: 28px;
}

.container {
  max-width: 980px;
  margin: 0 auto;
}

.eyebrow {
  color: var(--accent);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

h1 {
  margin: 8px 0 10px;
  font-size: 30px;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 20px;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.94), rgba(12, 18, 30, 0.94));
  padding: 16px;
  margin-bottom: 14px;
}

.panel-title {
  font-weight: 600;
  margin-bottom: 7px;
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

.grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  display: inline-block;
  border-radius: 9px;
  padding: 10px 14px;
  font-size: 14px;
  border: 1px solid #29435d;
  background: #0b1626;
}

.btn.primary {
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  color: #062023;
  border-color: transparent;
  font-weight: 600;
}

.tag {
  font-size: 12px;
  color: #9dd7e5;
  border: 1px solid #274b5b;
  border-radius: 999px;
  padding: 3px 9px;
  display: inline-block;
  margin-right: 5px;
  margin-bottom: 6px;
}

.runtime-note {
  border-left: 3px solid var(--ok);
  padding-left: 10px;
  color: #c7d2fe;
  font-size: 14px;
  margin-top: 10px;
}

.empty-state {
  border: 1px dashed #334155;
  border-radius: 10px;
  padding: 14px;
  margin-top: 14px;
  background: rgba(15, 23, 42, 0.45);
}

.empty-state-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 5px;
}

.empty-state-copy {
  font-size: 14px;
  color: var(--muted);
}

.footer-note {
  margin-top: 24px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 900px) {
  .layout {
    flex-direction: column;
  }

  .rail {
    width: 100%;
    height: auto;
    position: static;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .main {
    padding: 16px;
  }
}