:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #1a1a2e;
  --bg-hover: #222240;
  --accent: #5ce1e6;
  --accent-dim: rgba(92, 225, 230, 0.15);
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --border: #2a2a40;
  --sidebar-width: 240px;
  --topbar-height: 64px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
}

.app {
  display: flex;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
}

.brand-icon svg {
  width: 40px;
  height: 40px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
}

.brand-product {
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
  width: 100%;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--accent-dim);
  color: var(--accent);
}

.nav-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #666;
}

.status-dot.online {
  background: #4ade80;
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.5);
}

/* Main content */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topbar {
  height: var(--topbar-height);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
}

.topbar h1 {
  font-size: 20px;
  font-weight: 600;
}

.topbar-meta {
  font-size: 13px;
  color: var(--text-secondary);
}

.topbar-meta span {
  padding: 4px 12px;
  background: var(--bg-card);
  border-radius: 6px;
  border: 1px solid var(--border);
}

/* Panels */
.panel {
  display: none;
  flex: 1;
  overflow: hidden;
}

.panel.active {
  display: flex;
  flex-direction: column;
}

.panel iframe {
  flex: 1;
  width: 100%;
  border: none;
  background: var(--bg-primary);
}

/* Overview */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  padding: 32px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: var(--accent);
}

.card h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--accent);
}

.card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

.btn {
  padding: 8px 20px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

.info-banner {
  margin: 0 32px 32px;
  padding: 16px 24px;
  background: var(--accent-dim);
  border: 1px solid rgba(92, 225, 230, 0.3);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.info-banner strong {
  color: var(--accent);
}

@media (max-width: 768px) {
  .sidebar {
    width: 64px;
  }
  .brand-text, .nav-item span:not(.nav-icon), .sidebar-footer span {
    display: none;
  }
  .nav-item {
    justify-content: center;
    padding: 12px;
  }
}