:root {
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --primary: #0070f3;
    --primary-hover: #0051b3;
    --text-main: #333333;
    --text-muted: #666666;
    --accent: #e1f5fe;
    --accent-text: #0288d1;
    --border: #eaeaea;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #111;
}

h2 {
    margin-top: 0;
    font-size: 1.3rem;
    border-bottom: 2px solid var(--border);
    padding-bottom: 10px;
    color: #222;
}

h3 {
    margin-top: 25px;
    font-size: 1.1rem;
    color: var(--text-muted);
}

.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

.layout-grid-double {
    margin-top: 25px;
}

@media (min-width: 768px) {
    .grid { grid-template-columns: 1fr 2fr; }
    .layout-grid-double { grid-template-columns: 1fr 1fr; }
}

.card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border: 1px solid var(--border);
}

.input-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.9rem;
}

input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 1rem;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
}

.btn {
    width: 100%;
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 12px;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}

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

.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

@media (min-width: 480px) {
    .results-grid { grid-template-columns: 1fr 1fr; }
}

.result-box {
    background: var(--bg-color);
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.result-box .label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.result-box .value {
    font-size: 1.3rem;
    font-weight: 700;
    color: #111;
}

.result-box .sub-value {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.result-box.highlight { background: var(--accent); border-color: #b3e5fc; }
.result-box.highlight .value { color: var(--accent-text); }
.result-box.mechanics { background: #f0fdf4; border-color: #bbf7d0; }
.result-box.mechanics .value { color: #16a34a; }
.result-box.branch-box { background: #eef2ff; border-color: #e0e7ff; }
.result-box.branch-box .value { color: #4f46e5; }

.result-box.alert-box { background: #fff1f2; border-color: #fecdd3; }
.result-box.alert-box .value { color: #e11d48; }
.result-box.power-box { background: #faf5ff; border-color: #f3e8ff; }
.result-box.power-box .value { color: #9333ea; }
.result-box.cost-box { background: #fefce8; border-color: #fef08a; }
.result-box.cost-box .value { color: #ca8a04; }
.result-box.compliance-box { background: #f0fdf4; border-color: #dcfce7; }
.result-box.compliance-box .value { color: #15803d; }

/* BMS Section UI Layout Styles */
.bms-card {
    margin-bottom: 25px;
    background: #111827;
    color: white;
    border: 1px solid #1f2937;
}
.bms-card h2 {
    color: #f9fafb;
    border-bottom: 2px solid #1f2937;
}
.bms-flex-container {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
}
.bms-zone-ui {
    background: #1f2937;
    border: 1px solid #374151;
    border-radius: 8px;
    padding: 15px;
    flex: 1;
    min-width: 260px;
}
.bms-zone-title {
    font-size: 1rem;
    font-weight: bold;
    color: #38bdf8;
    margin-bottom: 10px;
    border-bottom: 1px dashed #374151;
    padding-bottom: 5px;
}
.bms-stat-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.85rem;
}
.bms-stat-label { color: #9ca3af; }
.bms-stat-value { font-weight: bold; }
.bms-control-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
}
.bms-btn {
    background: #374151;
    border: 1px solid #4b5563;
    color: white;
    font-weight: bold;
    border-radius: 4px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 1.1rem;
}
.bms-btn:hover { background: #4b5563; }
.bms-badge {
    background: #065f46;
    color: #34d399;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
}

/* Structural SLD Flow Styling rules */
.sld-card {
    margin-top: 25px;
    background: #0f172a;
    color: #f8fafc;
    border: 1px solid #1e293b;
}
.sld-card h2 { color: #f1f5f9; border-bottom: 2px solid #1e293b; }
.sld-container-wrapper {
    display: flex;
    justify-content: center;
    padding: 20px 0;
    font-family: "Courier New", Courier, monospace;
}
.sld-node-block { text-align: center; width: 100%; max-width: 600px; }
.sld-busbar {
    background: #eab308;
    color: #0f172a;
    font-weight: bold;
    padding: 8px;
    border-radius: 4px;
    text-transform: uppercase;
    font-size: 0.95rem;
}
.sld-line { color: #64748b; font-weight: bold; font-size: 1.2rem; margin: 2px 0; }
.sld-component-label { font-size: 0.8rem; color: #94a3b8; text-transform: uppercase; }
.sld-component {
    background: #1e293b;
    border: 1px solid #334155;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.9rem;
    display: inline-block;
    min-width: 320px;
}
.sld-component.breaker { border-left: 5px solid #ef4444; }
.sld-component.feeder { border-left: 5px solid #3b82f6; }
.sld-component.panel { border: 2px double #64748b; font-weight: bold; }
.sld-component.isolator { border-left: 5px solid #eab308; }
.sld-component.dynamic-drive { border-left: 5px solid #10b981; }
.sld-load {
    background: rgba(14, 165, 233, 0.15);
    border: 1px solid #0ea5e9;
    color: #38bdf8;
    padding: 10px;
    border-radius: 6px;
    font-weight: bold;
    display: inline-block;
}

/* Material BOM Table Layout */
.bom-table-wrapper { overflow-x: auto; }
.bom-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; text-align: left; }
.bom-table th { background: var(--bg-color); padding: 12px; font-weight: 600; border-bottom: 2px solid var(--border); }
.bom-table td { padding: 12px; border-bottom: 1px solid var(--border); }

.layout-card { margin-top: 25px; }
.layout-meta { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 12px; }
.canvas-wrapper { background: #1e293b; border-radius: 8px; padding: 15px; display: flex; justify-content: center; }
canvas { max-width: 100%; height: auto; background: #0f172a; border: 1px dashed #334155; }
.legend { display: flex; flex-wrap: wrap; gap: 15px; margin-top: 15px; font-size: 0.8rem; }
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-color { width: 14px; height: 14px; border-radius: 3px; display: inline-block; }

.zone-border { border: 2px dashed #64748b; background: rgba(100, 116, 139, 0.1); }
.duct-line { background: #0ea5e9; height: 5px; }
.branch-line { background: #38bdf8; height: 2px; }
.diffuser-node { background: #ef4444; border: 2px solid #fff; border-radius: 50%; width: 12px; height: 12px; }
.return-node { background: #f97316; border: 1px solid #fff; width: 12px; height: 12px; transform: rotate(45deg); }