/* Set Overlap Explorer - venn.js MicroSim
   Diagram on the left, explanation / classify panel on the right; the panel
   moves below the diagram under 600px. 16px minimum text in the diagram. */

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: Arial, Helvetica, sans-serif;
    background: aliceblue;
    color: #1f2937;
    font-size: 15px;
}

main { display: block; padding: 6px 8px; }

.top-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 12px;
    background: white;
    border: 1px solid silver;
    border-radius: 6px;
    padding: 5px 8px;
}

.mode-status { font-size: 14px; color: #334155; }

button {
    font-size: 14px;
    padding: 5px 12px;
    border-radius: 5px;
    border: 1px solid #1d4ed8;
    background: #2563eb;
    color: white;
    cursor: pointer;
}

button:hover { background: #1d4ed8; }
button[aria-pressed="true"] { background: #b45309; border-color: #92400e; }
button.secondary { background: #f1f5f9; color: #1f2937; border-color: #64748b; }
button:focus-visible { outline: 3px solid #f59e0b; outline-offset: 2px; }

.work {
    display: flex;
    gap: 8px;
    margin-top: 6px;
    align-items: flex-start;
}

.venn-col {
    flex: 1 1 60%;
    min-width: 0;
    background: white;
    border: 1px solid silver;
    border-radius: 6px;
}

#venn-diagram { display: flex; justify-content: center; }
#venn-diagram svg { display: block; }

/* venn.js labels */
#venn-diagram text {
    font-size: 16px !important;
    font-weight: bold;
    fill: #1f2937 !important;
    pointer-events: none;
}

#venn-diagram .venn-area path { cursor: pointer; }
.region-hl { pointer-events: none; }

.panel {
    flex: 0 0 38%;
    background: white;
    border: 1px solid silver;
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 15px;
    line-height: 1.4;
    min-height: 200px;
}

.panel h2 { font-size: 16px; color: #1e3a8a; margin-bottom: 4px; }
.panel .def { margin-bottom: 6px; }
.panel ul { margin: 4px 0 0 18px; }
.panel li { margin-bottom: 4px; }
.panel .muted { color: #64748b; font-size: 14px; }
.panel .item-card {
    background: #f8fafc;
    border-left: 4px solid #7c3aed;
    border-radius: 4px;
    padding: 6px 8px;
    margin: 6px 0;
}
.panel .result { border-radius: 5px; padding: 6px 8px; margin: 6px 0; }
.panel .result.right { background: #dcfce7; color: #14532d; }
.panel .result.wrong { background: #fef3c7; color: #78350f; }
.panel .progress { font-size: 13px; color: #475569; }
.panel .actions { margin-top: 6px; display: flex; gap: 8px; }

.swatch {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 4px;
    vertical-align: -1px;
}

.venn-tooltip {
    position: absolute;
    max-width: min(260px, 80vw);
    background: #1f2937;
    color: white;
    padding: 6px 9px;
    border-radius: 6px;
    font-size: 14px;
    line-height: 1.35;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s;
    z-index: 20;
    white-space: normal;
    overflow-wrap: break-word;
}

.venn-tooltip.visible { opacity: 1; }
.venn-tooltip b { color: #fde68a; }

@media (max-width: 599px) {
    .work { flex-direction: column; align-items: stretch; }
    .panel { flex: 0 0 auto; }
}