* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: Arial, sans-serif;
}

body {
    display: flex;
    flex-direction: column;
}

/* En-tête */

header {
    height: 60px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid #ccc;
}

.streamer-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.streamer-selector select {
    min-width: 180px;
    padding: 6px 10px;
}

/* Disposition principale sur PC */

.layout {
    flex: 1;
    min-height: 0;
    min-width: 0;
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr) 300px;
    transition: grid-template-columns 250ms ease;
}

/* Panneau Streams */

.streams-panel {
    position: relative;
    min-width: 0;
    min-height: 0;
    padding: 15px;
    border-right: 1px solid #ccc;
    overflow-x: hidden;
    overflow-y: auto;
    transition: opacity 200ms ease, padding 250ms ease;
}

/* Graphique */

.chart-panel {
    min-width: 0;
    min-height: 0;
    height: 100%;
    margin: 0;
    padding: 15px;
    overflow: hidden;
}

#chart-scroll {
width: 100%;
height: 100%;
min-height: 0;
overflow-x: auto;
overflow-y: hidden;
cursor: grab;
}

#chart-scroll:active {
cursor: grabbing;
}

#chart-container {
position: relative;
height: 100%;
min-height: 0;
min-width: 100%;
}

#viewer-chart {
display: block;
}

/* Panneau Chansons */

.songs-panel {
    position: relative;
    min-width: 0;
    min-height: 0;
    padding: 15px;
    border-left: 1px solid #ccc;
    overflow-x: hidden;
    overflow-y: auto;
    transition: opacity 200ms ease, padding 250ms ease;
}

/* Titres et listes */

h2 {
    margin-top: 0;
    font-size: 18px;
}

.date-filters {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.date-filters label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
}

.date-filters input {
    padding: 6px;
}

.streams-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stream-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
}

.stream-item:hover {
    background: #eee;
}

.stream-item input {
    cursor: pointer;
}

.songs-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.song-summary-item {
    padding: 9px;
    border-radius: 5px;
    cursor: pointer;
}

.song-summary-item:hover {
    background: #eee;
}

.song-summary-item.highlighted {
    background: #ddd;
    box-shadow: inset 3px 0 0 #333;
}

.song-title {
    font-weight: bold;
}

.song-artist {
    font-size: 13px;
    color: #666;
    margin-top: 2px;
}

.song-count {
    font-size: 12px;
    color: #888;
    margin-top: 4px;
}

.songs-summary {
    color: #666;
}

.empty-state {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    pointer-events: none;
}

/* Boutons de repli */

.panel-toggle {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;

    width: 28px;
    height: 48px;
    padding: 0;

    border: 1px solid #ccc;
    border-radius: 8px;
    background: #f5f5f5;
    color: #333;

    font-size: 25px;
    line-height: 1;
    cursor: pointer;
}

.panel-toggle:hover {
    background: #ddd;
}

.panel-toggle:focus-visible {
    outline: 2px solid #777;
    outline-offset: 2px;
}

.streams-toggle {
    right: -1px;
}

.songs-toggle {
    left: -1px;
}

/* PC : Streams replié, bouton conservé */

.layout.streams-collapsed {
    grid-template-columns: 28px minmax(0, 1fr) 300px;
}

.layout.streams-collapsed .streams-panel {
    padding: 0;
    border: 0;
    overflow: visible;
}

.layout.streams-collapsed .streams-toggle {
    right: 0;
}

/* PC : Chansons replié, bouton conservé */

.layout.songs-collapsed {
    grid-template-columns: 240px minmax(0, 1fr) 28px;
}

.layout.songs-collapsed .songs-panel {
    padding: 0;
    border: 0;
    overflow: visible;
}

.layout.songs-collapsed .songs-toggle {
    left: 0;
}

/* PC : les deux panneaux repliés */

.layout.streams-collapsed.songs-collapsed {
    grid-template-columns: 28px minmax(0, 1fr) 28px;
}

/* Masquer le contenu des panneaux repliés, pas les boutons */

.layout.streams-collapsed .streams-panel > :not(.streams-toggle),
.layout.songs-collapsed .songs-panel > :not(.songs-toggle) {
    visibility: hidden;
}

/* Mobile : le graphique occupe toute la surface */

@media (max-width: 700px) {
    .layout {
        position: relative;
        display: block;
        min-width: 0;
        overflow: hidden;
    }

    .chart-panel {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        padding: 8px;
        border: 0;
    }

    #chart-scroll {
    width: 100%;
    height: 100%;
    }

    .streams-panel,
    .songs-panel {
        position: absolute;
        top: 0;
        bottom: 0;
        z-index: 4;

        width: min(80vw, 300px);
        height: 100%;
        margin: 0;
        padding: 15px;

        background: white;
        overflow-x: hidden;
        overflow-y: auto;

        transition: transform 250ms ease;
    }

    .streams-panel {
        left: 0;
        border-right: 1px solid #ccc;
    }

    .songs-panel {
        right: 0;
        border-left: 1px solid #ccc;
    }

    /* Streams fermé : conserver 28 px pour le bouton */

    .layout.streams-collapsed .streams-panel {
        transform: translateX(calc(-100% + 28px));
        padding: 15px;
        overflow: hidden;
    }

    /* Chansons fermé : conserver 28 px pour le bouton */

    .layout.songs-collapsed .songs-panel {
        transform: translateX(calc(100% - 28px));
        padding: 15px;
        overflow: hidden;
    }

    /* Cacher le contenu quand le panneau est replié */

    .layout.streams-collapsed .streams-panel > :not(.streams-toggle),
    .layout.songs-collapsed .songs-panel > :not(.songs-toggle) {
        visibility: hidden;
    }

    /* Boutons positionnés sur les bords visibles */

    .streams-toggle {
        right: 0;
    }

    .songs-toggle {
        left: 0;
    }
}

/* Respecter les préférences d'animation réduite */

@media (prefers-reduced-motion: reduce) {
    .layout,
    .streams-panel,
    .songs-panel {
        transition: none;
    }
}