:root {
    --gap: 1.2vw;
}
* {
    box-sizing: border-box;
}
html,
body {
    height: 100%;
}
body {
    margin: 0;
    font-family:
        system-ui,
        -apple-system,
        Segoe UI,
        Roboto,
        "Helvetica Neue",
        Arial;
    background: linear-gradient(90deg, #0f2027, #000000, #01131b);
    color: #fff;
    padding: 1.5vw 1.5vw 7vw; /* leave space for player */
}
.tiles {
    display: grid;
    /* Default: horizontal/landscape layout — 4 tiles per row */
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}
.tile {
    position: relative;
    padding: 1.5vw;
    border-radius: 12px;
    min-height: 8vw;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    color: #fff;
    cursor: pointer;
    transition:
        transform 0.18s ease,
        box-shadow 0.18s ease,
        min-height 0.2s ease;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.18);
}
#progress,
#volume {
    flex: 1;
    height: 0.4vw;
    cursor: pointer;
    accent-color: rgba(255, 255, 255, 0.6);
}

/* Thumb / circle for both range inputs (base size in vw) */
#progress::-webkit-slider-thumb,
#volume::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 0.8vw;
    height: 0.8vw;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}
#progress::-moz-range-thumb,
#volume::-moz-range-thumb {
    width: 0.8vw;
    height: 0.8vw;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.tile:hover {
    transform: translateY(-6px);
}
.tile.expanded {
    min-height: 35vw;
}
.tile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.6vw;
}
.tile .title {
    font-weight: 700;
    font-size: 1.2vw; /* scales with viewport width */
}

/* Portrait: single column, larger text for readability */
@media (orientation: portrait) {
    .tiles {
        grid-template-columns: 1fr;
    }
    :root {
        --scale: 4.8;
    }
    :root {
        --gap: calc(1.2vw * 4.8);
    }
    .tile {
        padding: calc(1.5vw * 4.8);
    }
    .tile.expanded {
        min-height: calc(35vw * 4.8);
    }
    .tile-header {
        gap: calc(0.6vw * 4.8);
    }
    .tile .title {
        font-size: calc(1.2vw * 4.8);
    }
    .tile .expand-btn {
        font-size: calc(0.9vw * 4.8) !important;
        padding: calc(0.3vw * 4.8);
    }
    .tile-content {
        margin-top: calc(0.5vw * 4.8);
        font-size: calc(0.85vw * 4.8) !important;
    }
    .tile-info {
        margin-bottom: calc(0.7vw * 4.8);
        padding-bottom: calc(0.5vw * 4.8);
    }
    .tile-info .artist {
        margin-bottom: calc(0.3vw * 4.8);
        font-size: calc(0.85vw * 4.8) !important;
    }
    .tile-info .genre {
        font-size: calc(0.8vw * 4.8) !important;
    }
    .tile-info .genre {
        font-size: calc(0.8vw * 4.8);
    }
    .tile-lyrics {
        padding: calc(0.6vw * 4.8) 0;
        font-size: calc(0.85vw * 4.8) !important;
        text-wrap: nowrap !important;
        width: 69vw;
    }
    body {
        padding: calc(1.5vw * 4.8) calc(1.5vw * 4.8) calc(7vw * 4.8);
    }
    #current-title {
        font-size: calc(0.95vw * 4.8) !important;
    }
    #time {
        font-size: calc(0.8vw * 4.8) !important;
    }
    #play-pause {
        font-size: calc(1.2vw * 4.8) !important;
        padding: calc(0.4vw * 4.8) calc(0.6vw * 4.8);
    }
    /* scale the player panel in portrait — allow it to grow when stacked */
    .player {
        min-height: calc(4.5vw * 4.8) !important;
        height: auto !important;
        padding: calc(0.8vw * 4.8) calc(1.2vw * 4.8) !important;
    }
    /* progress and volume sizing for portrait */
    #progress,
    #volume {
        height: calc(0.4vw * 4.8);
    }
    #progress::-webkit-slider-thumb,
    #volume::-webkit-slider-thumb {
        width: calc(0.8vw * 4.8) !important;
        height: calc(0.8vw * 4.8) !important;
    }
    #progress::-moz-range-thumb,
    #volume::-moz-range-thumb {
        width: calc(0.8vw * 4.8) !important;
        height: calc(0.8vw * 4.8) !important;
    }
}

/* Landscape explicit adjustments (ensures consistent sizing when needed) */
@media (orientation: landscape) {
    .tile {
        min-height: 8vw;
    }
    /* 4 columns in landscape for better readability */
    .tiles {
        grid-template-columns: repeat(4, 1fr);
    }
    :root {
        --gap: calc(1.2vw * 1.2);
    }
    .tile {
        padding: calc(1.5vw * 1.2);
        min-height: calc(8vw * 1.2);
    }
    .tile.expanded {
        min-height: calc(35vw * 1.2);
    }
    .tile-header {
        gap: calc(0.6vw * 1.2);
    }
    .tile .title {
        font-size: calc(1.2vw * 1.2);
    }
    .tile .expand-btn {
        font-size: calc(0.9vw * 1.2) !important;
        padding: calc(0.3vw * 1.2);
    }
    .tile-content {
        margin-top: calc(0.5vw * 1.2);
        font-size: calc(0.85vw * 1.2) !important;
    }
    .tile-info {
        margin-bottom: calc(0.7vw * 1.2);
        padding-bottom: calc(0.5vw * 1.2);
    }
    .tile-info .artist {
        margin-bottom: calc(0.3vw * 1.2);
        font-size: calc(0.85vw * 1.2);
    }
    .tile-info .genre {
        font-size: calc(0.8vw * 1.2);
    }
    .tile-lyrics {
        padding: calc(0.6vw * 1.2) 0;
        font-size: calc(0.85vw * 1.2) !important;
        text-wrap: nowrap !important;
        width: 19vw;
    }
    body {
        padding: calc(1.5vw * 1.2) calc(1.5vw * 1.2) calc(7vw * 1.2);
    }
    #current-title {
        font-size: calc(0.95vw * 1.2) !important;
    }
    /* scale player-info width in landscape */
    .player-info {
        flex: 0 0 calc(16vw * 1.2);
        min-width: calc(10vw * 1.2);
        max-width: calc(32vw * 1.2);
    }
    #time {
        font-size: calc(0.8vw * 1.2) !important;
    }
    #play-pause {
        font-size: calc(1.2vw * 1.2) !important;
        padding: calc(0.4vw * 1.2) calc(0.6vw * 1.2);
    }
    /* scale the player panel in landscape */
    .player {
        min-height: calc(4.5vw * 1.2) !important;
        height: auto !important;
        padding: calc(0.8vw * 1.2) calc(1.2vw * 1.2) !important;
    }
    /* progress and volume sizing for landscape */
    #progress,
    #volume {
        height: calc(0.4vw * 1.2);
    }
    #progress::-webkit-slider-thumb,
    #volume::-webkit-slider-thumb {
        width: calc(0.8vw * 1.2) !important;
        height: calc(0.8vw * 1.2) !important;
    }
    #progress::-moz-range-thumb,
    #volume::-moz-range-thumb {
        width: calc(0.8vw * 1.2) !important;
        height: calc(0.8vw * 1.2) !important;
    }
    /* make volume smaller in landscape so progress gets more space */
    #volume {
        flex: 0 0 calc(6vw * 1.2);
        width: calc(6vw * 1.2);
        max-width: calc(12vw * 1.2);
    }
}
.tile .play-btn {
    display: none;
}
.tile .expand-btn {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: 0.3vw;
    flex-shrink: 0;
}
.tile.playing {
    outline: 3px solid rgba(255, 255, 255, 0.14);
}
.tile-content {
    margin-top: 0.5vw;
    overflow-y: auto;
    flex: 1;
    font-size: 0.85vw;
    line-height: 1.4;
}
.tile-content.hidden {
    display: none;
}
.tile-info {
    margin-bottom: 0.7vw;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 0.5vw;
}
.tile-info .artist {
    font-weight: 600;
    margin-bottom: 0.3vw;
}
.tile-info .genre {
    opacity: 0.9;
}
.tile-lyrics {
    white-space: pre-wrap;
    word-wrap: break-word;
    padding: 0.6vw 0;
}

/* tiles aligned: no vertical offset */
.tile {
    margin-top: 0;
}

.player {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: 12px;
    /* Base height uses vw so it scales with viewport; orientation media queries will multiply this */
    min-height: 4.5vw;
    padding: 0.8vw 1.2vw;
    border-radius: 10px;
    background: rgba(10, 10, 10, 0.6);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}
.player-info {
    /* Use vw-based sizing so title area scales with viewport; clamp with min/max widths */
    flex: 0 0 16vw;
    min-width: calc(10vw);
    max-width: calc(32vw);
    padding-right: 1vw;
}
#current-title {
    font-weight: 700;
}
.player-controls {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
}
#play-pause {
    font-size: 1.2vw;
    padding: 0.4vw 0.6vw;
    background: rgba(255, 255, 255, 0.12);
    border: none;
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
}
#progress {
    flex: 1;
}
#time {
    white-space: nowrap;
    color: #ddd;
}
#volume {
    /* width fallback for desktop layouts; will be overridden by flex in small screens */
    width: 100px;
}

/* colorful backgrounds generated via JS-set inline styles or fallback palette */

/* Responsive player layout for portrait devices (stack controls in portrait) */
@media (orientation: portrait) {
    .player {
        flex-direction: column;
        align-items: stretch;
        height: auto;
        padding: 10px;
        gap: 8px;
    }

    .player-info {
        flex: 0 0 auto;
        margin-bottom: 6px;
    }

    .player-controls {
        flex-direction: column;
        gap: 8px;
    }

    #progress {
        width: 100%;
        flex: none;
    }

    #volume {
        width: 100%;
        flex: none;
    }

    #play-pause {
        align-self: flex-start;
    }

    #time {
        font-size: calc(0.75vw * 4.8);
    }
}