:root {
    --bg-main: #090d16;
    --bg-sidebar: #111827;
    --bg-panel: #1f2937;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --border: #374151;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
}

.platform-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

/* Sidebar Styling rules */
.sidebar-nav {
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-brand { display: flex; align-items: center; gap: 0.5rem; }
.sidebar-brand h2 { margin: 0; font-size: 1.3rem; }
.brand-logo { font-size: 1.5rem; color: var(--accent-blue); }

.search-utilities-box input {
    width: 100%; box-sizing: border-box; padding: 0.6rem;
    background-color: var(--bg-main); color: var(--text-main);
    border: 1px solid var(--border); border-radius: 6px;
}

.tools-menu { display: flex; flex-direction: column; gap: 0.35rem; }
.menu-item-btn {
    text-align: left; background: none; border: none; padding: 0.6rem;
    color: var(--text-muted); cursor: pointer; font-size: 0.95rem;
    border-radius: 6px; display: flex; align-items: center; gap: 0.5rem;
}
.menu-item-btn:hover { background-color: var(--bg-main); color: var(--text-main); }

/* Main Screen Panel structures */
.main-workspace { padding: 2.5rem; display: flex; flex-direction: column; gap: 2rem; }
.workspace-header h1 { margin: 0; font-size: 2.2rem; }
.workspace-header p { margin: 0.25rem 0 0 0; color: var(--text-muted); }

/* Dashboard Hub Grid layout links cards */
.dashboard-grid-view {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem;
}
.dashboard-tile-card {
    background-color: var(--bg-sidebar); border: 1px solid var(--border);
    padding: 1.5rem; border-radius: 12px; cursor: pointer; transition: transform 0.2s, border-color 0.2s;
}
.dashboard-tile-card:hover { transform: translateY(-3px); border-color: var(--accent-blue); }
.tile-icon-box { font-size: 2.5rem; margin-bottom: 0.5rem; }
.dashboard-tile-card h3 { margin: 0 0 0.25rem 0; font-size: 1.15rem; }
.dashboard-tile-card p { margin: 0 0 1rem 0; font-size: 0.85rem; color: var(--text-muted); line-height: 1.4; }
.tile-cat-badge { font-size: 0.75rem; background: var(--bg-main); padding: 0.25rem 0.5rem; border-radius: 4px; color: var(--accent-blue); font-weight: bold; }

/* ⚠️ AD FRAME DESIGN LAYOUT MODULES RULES */
.ad-placeholder-wrapper {
    background-color: #0b0f19; border: 1px dashed #223147;
    border-radius: 8px; padding: 0.5rem; text-align: center;
}
.ad-tag { font-size: 0.65rem; color: #475d7a; display: block; margin-bottom: 0.25rem; font-weight: bold; letter-spacing: 0.5px; }
.ad-slot-box { min-height: 90px; display: flex; justify-content: center; align-items: center; color: #223147; font-family: monospace; font-size: 0.8rem; }

/* Workspace Injection frames */
.universal-app-frame { display: flex; flex-direction: column; gap: 1.5rem; max-width: 650px; }
.workspace-panel-view { background: var(--bg-sidebar); border: 2px dashed var(--border); border-radius: 12px; padding: 3rem 1.5rem; text-align: center; }
.status-panel-view { background: var(--bg-sidebar); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; }
.hidden { display: none !important; }