/* Semester Storage Estimator - layout
   Fixed total height (CANVAS_HEIGHT 600). The chart takes whatever height the
   controls and readout leave. Wide: readout to the right of the controls.
   Under 620px: readout moves beneath the controls. */
* { box-sizing: border-box; }
body { margin: 0; padding: 0; font-family: Arial, Helvetica, sans-serif; }
main { display: block; }

#app {
    height: 600px;
    display: flex;
    flex-direction: column;
    border: 1px solid silver;
    background: white;
}
#title-row {
    flex: 0 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 2px 12px;
    padding: 6px 10px 2px 10px;
    background: aliceblue;
}
#title { font-size: 19px; font-weight: bold; }
#caption { font-size: 14px; color: dimgray; font-style: italic; }

#chart-wrap {
    flex: 1 1 auto;
    min-height: 150px;
    position: relative;
    background: aliceblue;
    border-bottom: 1px solid silver;
    padding: 2px 8px 4px 4px;
}
#chart-wrap canvas { width: 100% !important; height: 100% !important; }

#bottom {
    flex: 0 0 auto;
    display: flex;
    gap: 10px;
    padding: 6px 10px 6px 10px;
}
#controls { flex: 1 1 auto; min-width: 0; }
.row {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 29px;
    font-size: 15px;
}
.row label { flex: 0 0 170px; }
.row label em { font-style: normal; color: dimgray; }
.row .val { flex: 0 0 34px; text-align: right; font-weight: bold; }
.row input[type="range"] { flex: 1 1 auto; min-width: 80px; }
.row.disabled label, .row.disabled .val { color: darkgray; }
.row.buttons { height: auto; flex-wrap: wrap; margin-top: 4px; gap: 6px; }
.mode-label { font-size: 15px; }

.seg, .btn {
    font-size: 14px;
    padding: 5px 10px;
    border: 1px solid steelblue;
    border-radius: 6px;
    background: white;
    color: #1f4f7a;
    cursor: pointer;
}
.seg[aria-pressed="true"] { background: steelblue; color: white; font-weight: bold; }
.btn { background: #f0f6fb; }
.seg:focus-visible, .btn:focus-visible, input:focus-visible { outline: 3px solid orange; outline-offset: 1px; }

#readout {
    flex: 0 0 255px;
    font-size: 14px;
    line-height: 1.32;
    background: aliceblue;
    border: 1px solid lightsteelblue;
    border-radius: 8px;
    padding: 6px 9px;
}
#readout .k { color: #333; }
#readout .n { font-weight: bold; }
#readout .f { color: dimgray; }
#readout .headroom { font-size: 16px; font-weight: bold; margin: 3px 0; }
#readout .verdict { font-weight: bold; }
#readout .ok { color: #1a5e20; }
#readout .warn { color: #8a5300; }
#readout .bad { color: #b00020; }
#readout .case { margin-top: 4px; padding-top: 4px; border-top: 1px dashed lightsteelblue; }

/* Readout moves beneath the controls on narrow screens */
@media (max-width: 619px) {
    #bottom { flex-direction: column; gap: 4px; }
    #readout { flex: 0 0 auto; }
    .row label { flex-basis: 150px; font-size: 14px; }
    .row { height: 27px; }
    .row.buttons { gap: 4px; }
    .seg, .btn { padding: 5px 7px; }
    .mode-label { font-size: 14px; }
    #caption { font-size: 13px; }
}