/* Layout — Sidebar + Main Grid */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100%;
    font-family: var(--font-body);
    background: var(--void);
    color: var(--text);
    overflow: hidden;
}

.app-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--header-height) 1fr;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    grid-row: 1 / -1;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px 0;
}

.sidebar-brand {
    padding: 0 20px 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}

.sidebar-brand h1 {
    font: 600 16px var(--font-heading);
    color: var(--gold);
    letter-spacing: -0.3px;
}

.sidebar-brand .subtitle {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.sidebar-nav {
    flex: 1;
    padding: 0 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-dim);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.15s;
    text-decoration: none;
}

.nav-item:hover {
    background: var(--gold-subtle);
    color: var(--text);
}

.nav-item.active {
    background: var(--gold-glow);
    color: var(--gold);
}

.nav-item .nav-icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

/* Header */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.header-title {
    font: 600 18px var(--font-heading);
    color: var(--text);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-dim);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.status-dot.connected { background: var(--success); }
.status-dot.error { background: var(--danger); }

/* Main content */
.main-content {
    overflow-y: auto;
    padding: 24px;
    background: var(--void);
}

/* Scrollbar */
.main-content::-webkit-scrollbar { width: 6px; }
.main-content::-webkit-scrollbar-track { background: transparent; }
.main-content::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }