:root {
  --bg: #0a0c10;
  --bg-elev: #11151b;
  --bg-panel: #0f1318;
  --border: #1d242d;
  --border-strong: #2a3441;
  --text: #d6dde6;
  --text-dim: #7a8595;
  --text-muted: #4f5867;
  --accent: #6fb8ff;
  --accent-dim: #2f5a87;
  --green: #6dd58c;
  --mono: 'JetBrains Mono', 'SF Mono', 'Menlo', 'Consolas', monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
  --sidebar-w: 240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* SIDEBAR */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 0 16px;
  z-index: 10;
}

.brand {
  padding: 0 20px 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.brand-mark {
  display: inline-block;
  font-size: 18px;
  color: var(--accent);
  margin-right: 8px;
  transform: translateY(-1px);
}
.brand-name {
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--text);
}
.brand-domain {
  display: block;
  margin-top: 4px;
  margin-left: 26px;
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.nav-list {
  list-style: none;
  flex: 1;
  padding: 0 12px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  margin-bottom: 2px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-dim);
  transition: background 0.12s, color 0.12s;
}
.nav-link .num {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}
.nav-link:hover {
  background: var(--bg-panel);
  color: var(--text);
}
.nav-link.active {
  background: var(--bg-panel);
  color: var(--accent);
  box-shadow: inset 2px 0 0 var(--accent);
}
.nav-link.active .num {
  color: var(--accent-dim);
}

.sidebar-footer {
  padding: 16px 20px 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11px;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  background: var(--accent-dim);
  color: var(--text);
  border-radius: 3px;
  font-size: 10px;
  letter-spacing: 0.06em;
  width: fit-content;
}
.dim { color: var(--text-dim); }

/* MAIN */
.content {
  margin-left: var(--sidebar-w);
  padding: 0;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 5;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  background: var(--bg-panel);
  border-radius: 4px;
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(109,213,140,0.15);
}
.status-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text);
}

.topbar-meta { font-size: 11px; }

.panel {
  display: none;
  padding: 40px 48px;
  max-width: 980px;
}
.panel.active { display: block; }

.panel h1 {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--text);
}
.panel-num {
  display: inline-block;
  color: var(--text-muted);
  margin-right: 12px;
  font-size: 14px;
  letter-spacing: 0.06em;
}

.lede {
  font-family: var(--sans);
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 32px;
  max-width: 60ch;
}

.placeholder {
  border: 1px dashed var(--border-strong);
  background: var(--bg-panel);
  padding: 28px 28px 24px;
  border-radius: 6px;
  position: relative;
}
.placeholder-tag {
  position: absolute;
  top: -10px; left: 20px;
  background: var(--bg);
  padding: 0 10px;
  color: var(--text-muted);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.placeholder p {
  font-family: var(--sans);
  color: var(--text-dim);
  font-size: 13px;
  max-width: 60ch;
}

::selection { background: var(--accent-dim); color: var(--text); }