:root {
  --bg: #14101f;
  --sidebar: #1a1a2e;
  --panel: #16213e;
  --border: #2c2c44;
  --text: #e0e0e0;
  --muted: #8a8a9e;
  --gold: #d4af37;
  --gold-2: #f4d03f;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  display: flex;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 240px;
  min-width: 240px;
  height: 100vh;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 18px 14px;
}
.brand { display: flex; align-items: center; gap: 12px; padding: 6px 8px 18px; }
.brand-mark { font-size: 28px; }
.brand-name { color: var(--gold); font-weight: 700; font-size: 15px; }
.brand-sub { color: var(--muted); font-size: 12px; }

.nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav-group {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 14px 10px 4px;
}
.nav-item {
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.nav-item:hover { background: rgba(212, 175, 55, 0.1); }
.nav-item.active {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.22), rgba(244, 208, 63, 0.12));
  color: var(--gold-2);
  font-weight: 600;
}

.sidebar-footer { border-top: 1px solid var(--border); padding-top: 14px; }
.logout {
  display: block;
  text-align: center;
  color: #ff8080;
  text-decoration: none;
  font-size: 13px;
  padding: 8px;
  border: 1px solid rgba(255, 128, 128, 0.3);
  border-radius: 8px;
}
.logout:hover { background: rgba(255, 128, 128, 0.08); }
.footer-note { color: var(--muted); font-size: 11px; text-align: center; margin-top: 8px; }

/* Content */
.content { flex: 1; display: flex; flex-direction: column; height: 100vh; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--sidebar);
  border-bottom: 1px solid var(--border);
  color: var(--gold);
  font-weight: 600;
}
.topbar button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
}
.topbar button:hover { color: var(--text); border-color: var(--gold); }
#frame { flex: 1; width: 100%; border: none; background: var(--bg); }