/* ============================================
   Listen Page — builds on ../style.css and base.css
   ============================================ */
:root {
    --shu: #C23B22;              /* vermilion, for departures only */
    --shu-wash: rgba(194, 59, 34, 0.08);
    --mars: #C1440E;             /* rust: the Mars tab on hover and its sand */
    --grey-wash: #EDEDED;        /* the expected band */
    --grey-faint: #CCCCCC;       /* observations after the cursor */
}

:root[data-theme="dark"] {
    --grey-wash: #1E1E1E;
    --grey-faint: #444444;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

.listen-header {
    margin-bottom: calc(var(--spacing-unit) * 5);
}

/* ============================================
   Source switcher
   ============================================ */
.listen-sources {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 6);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.listen-tabs {
    align-items: baseline;
}

.listen-tabs,
.listen-chips,
.listen-segment {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 3);
}

.listen-tabs button,
.listen-chips button,
.listen-segment button {
    font: inherit;
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--grey-light);
    background: none;
    border: 0;
    border-bottom: 1px solid transparent;
    padding: 0 0 5px;
    cursor: inherit;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.listen-tabs button {
    font-size: 14px;
    font-weight: 300;
    color: var(--grey-mid);
}

.listen-tabs button:hover,
.listen-chips button:hover,
.listen-segment button:hover {
    color: var(--black);
}

@media (hover: hover) {
    .listen-tabs button[data-source="mars"]:hover {
        color: var(--mars);
    }
}

.listen-tabs button[aria-checked="true"],
.listen-chips button[aria-checked="true"],
.listen-segment button[aria-checked="true"] {
    color: var(--black);
    border-bottom-color: var(--black);
}

.listen-tabs button:focus-visible,
.listen-chips button:focus-visible,
.listen-segment button:focus-visible,
.listen-search input:focus-visible,
.listen input[type="range"]:focus-visible {
    outline: 1px solid var(--black);
    outline-offset: 4px;
}

.listen-segment button:disabled {
    color: var(--grey-border);
}

.listen-cities {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 5);
}

.listen-cities[hidden] {
    display: none;
}

.listen-chips button {
    font-size: 11px;
}

.listen-search {
    position: relative;
    display: flex;
    align-items: baseline;
    gap: calc(var(--spacing-unit) * 1.5);
}

.listen-search input {
    font: inherit;
    font-size: 13px;
    width: 160px;
    padding: 2px 0 5px;
    border: 0;
    border-bottom: 1px solid var(--grey-border);
    border-radius: 0;
    background: transparent;
    color: var(--black);
    cursor: inherit;
    -webkit-appearance: none;
    appearance: none;
}

.listen-search input:focus {
    border-bottom-color: var(--black);
}

.listen-results {
    position: absolute;
    top: 100%;
    right: 0;
    z-index: 20;
    min-width: 260px;
    margin-top: 6px;
    list-style: none;
    background: var(--white);
    border: 1px solid var(--black);
}

.listen-results[hidden] {
    display: none;
}

.listen-results li {
    display: flex;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 1.5);
    font-size: 13px;
}

.listen-results li small {
    color: var(--grey-light);
    font-size: 11px;
    text-align: right;
}

.listen-results li[aria-selected="true"],
.listen-results li:hover {
    background: var(--black);
    color: var(--white);
}

.listen-results li.is-empty {
    color: var(--grey-light);
}

/* ============================================
   Garden
   ============================================ */
.listen-stage {
    position: relative;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.listen-garden {
    display: block;
    width: 100%;
    height: clamp(320px, 52vh, 560px);
    border-top: 1px solid var(--grey-border);
    border-bottom: 1px solid var(--grey-border);
}

/* Red dust on Mars, stronger than the sand so the colour shows */
.listen-garden[data-source="mars"] {
    --sand: var(--mars);
    --sand-alpha: 3;
}

.listen-overlay {
    position: absolute;
    top: calc(var(--spacing-unit) * 1.5);
    left: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    pointer-events: none;
}

.listen-moment {
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--black);
    background: var(--white);
    padding-right: 8px;
}

.listen-departure {
    font-size: 12px;
    color: var(--grey-mid);
    background: var(--white);
    padding-right: 8px;
}

.listen-departure:empty {
    display: none;
}

/* Play sits in the garden, as on the front page, and steps back while playing */
.listen-stage:hover .listen-stage-play.is-playing {
    opacity: 1;
}

.listen-departure.is-departing {
    color: var(--shu);
}

.listen-transport {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 5);
    margin-bottom: calc(var(--spacing-unit) * 14);
}

/* Hairline sliders in the site's ink */
.listen input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 17px;
    background: transparent;
    cursor: inherit;
}

.listen input[type="range"]::-webkit-slider-runnable-track {
    height: 1px;
    background: var(--grey-border);
}

.listen input[type="range"]::-moz-range-track {
    height: 1px;
    background: var(--grey-border);
}

.listen input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 3px;
    height: 13px;
    margin-top: -6px;
    background: var(--black);
    border: 0;
    border-radius: 0;
}

.listen input[type="range"]::-moz-range-thumb {
    width: 3px;
    height: 13px;
    background: var(--black);
    border: 0;
    border-radius: 0;
}

/* ============================================
   Source timelines
   ============================================ */
.listen-legend {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 3);
    font-size: 11px;
    color: var(--grey-mid);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.listen-key {
    display: inline-block;
    width: 14px;
    height: 7px;
    margin-right: 6px;
    vertical-align: 0;
}

.listen-key-observed {
    height: 1px;
    vertical-align: 3px;
    background: var(--black);
}

.listen-key-expected {
    background: var(--grey-wash);
    border-top: 1px dashed var(--grey-light);
}

.listen-key-departure {
    width: 7px;
    border-radius: 50%;
    background: var(--shu);
}

.listen-timeline {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    border-bottom: 1px solid var(--grey-border);
    padding: calc(var(--spacing-unit) * 1) 0;
}

.listen-timeline canvas {
    display: block;
    width: 100%;
    height: 56px;
}

.listen-timeline-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 12px;
    color: var(--grey-mid);
}

.listen-timeline-label span:first-child {
    color: var(--black);
}

/* ============================================
   Voices
   ============================================ */
.listen-voice {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) 160px minmax(80px, 1fr);
    align-items: center;
    gap: calc(var(--spacing-unit) * 2.5);
    padding: calc(var(--spacing-unit) * 2) 0;
    border-bottom: 1px solid var(--grey-border);
    font-size: 12px;
    color: var(--grey-mid);
}

.listen-voice:first-child {
    border-top: 1px solid var(--black);
}

.listen-voice h3 {
    font-size: 16px;
    font-weight: 400;
    color: var(--black);
    letter-spacing: -0.01em;
    margin-bottom: 2px;
}

.listen-voice svg {
    width: 44px;
    height: 24px;
    overflow: visible;
}

.listen-voice svg * {
    fill: none;
    stroke: var(--black);
    stroke-width: 1;
    transition: stroke 0.4s ease, fill 0.4s ease;
}

.listen-voice svg .is-heavy {
    stroke-width: 2.5;
}

.listen-voice svg .is-solid {
    fill: var(--black);
    stroke: none;
}

.listen-voice {
    transition: opacity 1.2s ease;
}

.listen-voice.is-resting {
    opacity: 0.35;
}

.listen-voice.is-on svg .is-solid {
    fill: var(--black);
}

.listen-voice.is-departing svg .is-solid {
    fill: var(--shu);
}

.listen-voice-note {
    color: var(--black);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.listen-voice .iot-meter-fill {
    transition: width 0.15s linear;
}

.listen-controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: calc(var(--spacing-unit) * 6);
    margin-top: calc(var(--spacing-unit) * 5);
}

.listen-control {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 1);
}

/* ============================================
   Memory
   ============================================ */
/* One open row of six shapes, hairline above each like the voice list; the current shape is
   inverted to white on black, and a playing motif lights its contour */
.listen-memory {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.listen-shape {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 0.5);
    padding: calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 1.5);
    border-top: 1px solid var(--grey-border);
    font-size: 12px;
    color: var(--grey-mid);
    transition: border-color 0.6s ease, background-color 0.6s ease, color 0.6s ease;
}

.listen-shape svg {
    width: 72px;
    height: 45px;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    overflow: visible;
}

.listen-shape svg polyline {
    fill: none;
    stroke: var(--grey-light);
    stroke-width: 1;
    transition: stroke 1.4s ease;
}

.listen-shape svg circle {
    fill: var(--grey-light);
    transition: fill 1.4s ease;
}

.listen-shape h3 {
    font-size: 15px;
    font-weight: 400;
    color: var(--black);
    transition: color 0.6s ease;
}

.listen-shape.is-current {
    border-top-color: var(--black);
    background: var(--black);
    color: var(--grey-light);
}

.listen-shape.is-current h3 {
    color: var(--white);
}

.listen-shape.is-current svg polyline,
.listen-shape.is-sounding svg polyline {
    stroke: var(--black);
}

.listen-shape.is-current svg circle,
.listen-shape.is-sounding svg circle {
    fill: var(--black);
}

.listen-shape.is-sounding svg polyline,
.listen-shape.is-sounding svg circle {
    transition: none;
}

.listen-shape.is-current svg polyline {
    stroke: var(--white);
}

.listen-shape.is-current svg circle {
    fill: var(--white);
}

.listen-shape.is-sounding.is-departing svg circle {
    fill: var(--shu);
}

.listen .installation-links {
    flex-wrap: wrap;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .listen-scrub {
        grid-column: 1 / -1;
    }

    .listen-voice {
        grid-template-columns: 44px minmax(0, 1fr) 110px;
    }

    .listen-voice .iot-meter-bar {
        grid-column: 1 / -1;
    }

    .listen-memory {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .listen-sources {
        flex-direction: column;
        align-items: flex-start;
    }

    .listen-transport {
        grid-template-columns: minmax(0, 1fr);
        gap: calc(var(--spacing-unit) * 2);
    }

    .listen-controls {
        grid-template-columns: minmax(0, 1fr);
        gap: calc(var(--spacing-unit) * 2);
    }

    .listen-timeline {
        grid-template-columns: minmax(0, 1fr);
        gap: calc(var(--spacing-unit) * 0.5);
    }

    .listen-timeline-label {
        flex-direction: row;
        justify-content: space-between;
    }

    .listen-memory {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .listen-results {
        left: 0;
        right: auto;
        min-width: min(260px, 80vw);
    }
}

/* ============================================
   Credits
   ============================================ */
.listen-footer-text {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
}

.listen-credits {
    font-size: 11px;
    color: var(--grey-light);
    line-height: 1.6;
}

.listen-credits a {
    color: inherit;
    text-decoration: underline;
    text-decoration-color: var(--grey-border);
    text-underline-offset: 2px;
}

.listen-credits a:hover {
    color: var(--black);
}

/* The last section sits closer to the footer than the site's default spacing */
.listen .section:last-of-type {
    margin-bottom: 0;
}

.listen .footer {
    margin-top: calc(var(--spacing-unit) * 8);
}