@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=JetBrains+Mono:wght@400;600&display=swap');
:root {
    --bg-color: #0a0f17;
    --panel-bg: rgba(15, 20, 30, 0.85);
    --border-color: rgba(255, 255, 255, 0.07);
    --accent: #3b82f6;
}

body.city-bg {
    background-color: var(--bg-color);
    margin: 0; overflow: hidden;
    font-family: 'Inter', sans-serif;
    color: #e2e8f0;
}

.main-layout {
    display: flex;
    height: calc(100vh - 60px);
    width: 100vw;
}

.tools-side {
    width: 280px;
    background: var(--panel-bg);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-right: 1px solid var(--border-color);
    display: flex; flex-direction: column;
    overflow-y: auto; z-index: 10;
    box-shadow: 4px 0 20px rgba(0,0,0,0.3);
}

/* Tool Grid */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.city-tool {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    border-radius: 10px; padding: 10px;
    text-align: center; color: #cbd5e1;
    cursor: pointer; transition: all 0.2s;
    font-size: 0.78rem; font-family: 'Inter', sans-serif;
    backdrop-filter: blur(4px);
}
.city-tool:hover {
    background: rgba(255,255,255,0.06);
    border-color: rgba(59,130,246,0.3);
    transform: translateY(-1px);
}
.city-tool.active {
    background: rgba(59, 130, 246, 0.12);
    border-color: var(--accent);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.2);
    color: #f1f5f9;
}

.tool-icon {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

/* Canvas config */
.canvas-region {
    flex: 1;
    position: relative;
    background: #0f131a;
    background-image: radial-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 20px 20px;
    overflow: hidden;
    cursor: crosshair;
}

#cityCanvas {
    position: absolute;
    top: 0;
    left: 0;
}

.stat-box {
    background: rgba(0,0,0,0.3);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
}