/* Function Plot Slider Lab - minimal margins for iframe embedding.
   Plot height: 400px on desktop, 300px on narrow screens (set in the JS). */

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: aliceblue;
    color: #1f2937;
}

main {
    display: block;
    padding: 5px 8px;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 14px;
    background: white;
    border: 1px solid silver;
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 14px;
}

.ctl {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: bold;
}

select, input[type="number"] {
    font-size: 14px;
    padding: 3px 4px;
}

input[type="number"] { width: 80px; }

button {
    font-size: 14px;
    padding: 4px 12px;
    border-radius: 5px;
    border: 1px solid #15803d;
    background: #16a34a;
    color: white;
    cursor: pointer;
}

button:hover { background: #15803d; }

button.secondary {
    background: #f1f5f9;
    color: #1f2937;
    border-color: #64748b;
}

button.secondary:hover { background: #e2e8f0; }

button:focus-visible, select:focus-visible, input:focus-visible {
    outline: 3px solid #f59e0b;
    outline-offset: 2px;
}

.slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 5px;
    font-size: 14px;
}

.slider-label {
    font-weight: bold;
    font-style: italic;
    font-family: "Times New Roman", Times, serif;
    font-size: 18px;
}

#x-slider { flex: 1 1 auto; min-width: 120px; }

.slider-ends { color: #64748b; font-size: 12px; white-space: nowrap; }

.readout {
    margin: 4px 2px;
    font-size: 16px;
    font-family: "Courier New", Courier, monospace;
    font-weight: bold;
    color: #b91c1c;
}

#plot {
    width: 100%;
    background: white;
    border: 1px solid silver;
    border-radius: 6px;
    overflow: hidden;
}

.matches {
    margin: 4px 2px 0 2px;
    font-size: 14px;
    min-height: 18px;
    color: #14532d;
}

.matches.none { color: #92400e; }

@media (max-width: 480px) {
    .slider-ends { display: none; }
}