:root {
    --sdd-bg: #f4f6f9;
    --sdd-sidebar-bg: #1e293b;
    --sdd-sidebar-text: #cbd5e1;
    --sdd-sidebar-hover: #ffffff;
    --sdd-accent: #d97706;
    --sdd-text: #334155;
    --sdd-panel-bg: #ffffff;
    --sdd-border: #e2e8f0;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body.sdd-dashboard-layout {
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    height: 100vh;
    overflow: hidden;
    background-color: var(--sdd-bg);
    color: var(--sdd-text);
}
.sdd-sidebar {
    width: 280px;
    background-color: var(--sdd-sidebar-bg);
    color: var(--sdd-sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}
.sdd-brand {
    padding: 1.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--sdd-sidebar-hover);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.sdd-nav {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.sdd-nav-group {
    background: rgba(0,0,0,0.2);
    border-radius: 0.5rem;
    padding: 0.5rem;
}
.sdd-nav-summary {
    cursor: pointer;
    font-weight: 600;
    padding: 0.5rem;
    color: var(--sdd-sidebar-hover);
    outline: none;
    user-select: none;
}
.sdd-nav-summary::-webkit-details-marker { display: none; }
.sdd-nav-list {
    list-style: none;
    margin-top: 0.5rem;
    padding-left: 0.5rem;
}
.sdd-nav-list li { margin-bottom: 0.25rem; }
.sdd-nav-link {
    color: var(--sdd-sidebar-text);
    text-decoration: none;
    display: block;
    padding: 0.5rem;
    border-radius: 0.25rem;
    transition: all 0.2s;
}
.sdd-nav-link:hover {
    background-color: rgba(255,255,255,0.1);
    color: var(--sdd-sidebar-hover);
}
.sdd-main-content {
    margin-left: 280px;
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
}
.sdd-topbar {
    height: 60px;
    background-color: var(--sdd-panel-bg);
    border-bottom: 1px solid var(--sdd-border);
    display: flex;
    align-items: center;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 10;
}
.sdd-topbar-title {
    font-weight: bold;
    color: var(--sdd-accent);
}
.sdd-content-pane {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}
.sdd-hero-panel, .sdd-page-panel, .sdd-section-panel {
    background: var(--sdd-panel-bg);
    border-radius: 0.5rem;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    max-width: 1000px;
    margin: 0 auto;
}
.sdd-panel-body { margin-top: 1.5rem; line-height: 1.7; }
.sdd-prose h2 { margin: 2rem 0 1rem; color: var(--sdd-accent); }
.sdd-prose h3 { margin: 1.5rem 0 0.75rem; }
.sdd-prose p { margin-bottom: 1.25rem; }
.sdd-prose ul { margin-left: 1.5rem; margin-bottom: 1.25rem; }
.sdd-footer {
    padding: 1rem 2rem;
    text-align: center;
    font-size: 0.875rem;
    color: #64748b;
    border-top: 1px solid var(--sdd-border);
    background: var(--sdd-panel-bg);
}