/* Prerequisite Propagation Explorer - layout for a fixed-height iframe.
   The .app column fills the iframe (100vh); the graph takes whatever height is left
   after the title, the side panel (below the graph under 600 px) and the controls. */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: Arial, Helvetica, sans-serif; }
body { background: aliceblue; }

.app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    border: 1px solid silver;
}
.title {
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    padding: 6px 8px 2px 8px;
}
.content {
    flex: 1;
    min-height: 0;
    display: flex;
}
.graph-wrap {
    position: relative;
    flex: 1;
    min-width: 0;
}
#network {
    position: absolute;
    inset: 0;
}
.legend {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 2px 8px;
    padding: 2px 10px 4px 10px;
    font-size: 13px;
    color: #222;
}
.legend-bar {
    position: relative;
    width: 150px;
    height: 12px;
    border-radius: 3px;
    border: 1px solid #888;
    /* ColorBrewer RdYlBu: color-blind-safe diverging scale */
    background: linear-gradient(to right, #d73027, #fc8d59, #fee090, #91bfdb, #4575b4);
}
.legend-threshold {
    position: absolute;
    top: -4px;
    bottom: -4px;
    width: 3px;
    background: black;
}
.legend-note { color: #333; }

.panel {
    width: 280px;
    margin: 4px 6px 4px 0;
    padding: 8px 10px;
    background: white;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.35;
    overflow-y: auto;
}
.panel h2 { font-size: 17px; margin: 0 0 4px 0; }
.panel h3 { font-size: 14px; margin: 8px 0 2px 0; }
.panel ul { margin: 2px 0; padding-left: 18px; }
.panel li { margin: 1px 0; }
.panel .muted { color: #555; font-size: 13px; }
.status-ok { color: #1f4e8c; font-weight: bold; }
.status-low { color: #a1261b; font-weight: bold; }
.gap-box {
    margin-top: 6px;
    padding: 6px 8px;
    border: 2px solid #5b2a86;
    border-radius: 6px;
    background: #f5eefb;
}

.controls {
    background: white;
    border-top: 1px solid silver;
    padding: 6px 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
    align-items: center;
    font-size: 15px;
}
.control-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
#est-slider { width: 170px; }
.controls button, .controls select { font-size: 14px; padding: 3px 8px; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

@media (max-width: 599px) {
    .title { font-size: 17px; }
    .content { flex-direction: column; }
    .panel {
        width: auto;
        height: 142px;
        flex: none;
        margin: 0 6px 4px 6px;
        font-size: 13px;
    }
    .panel h2 { font-size: 15px; }
    .legend { font-size: 12px; }
    .legend-bar { width: 110px; }
    .controls { font-size: 14px; gap: 4px 12px; }
    #est-slider { width: 120px; }
}