/* =========================================
   BGM Mode Style (bgm_style.css)
   ========================================= */
:root {
    --bg-color: #f2f2f7;
    --card-bg: #ffffff;
    --text-color: #000000;
    --text-color-secondary: #8a8a8e;
    --border-color: #e5e5ea;
    --accent-color: #007aff;
    --accent-color-light: #e6f2ff;
    --danger-color: #ff3b30;
    --blur-bg-light: rgba(248, 248, 248, 0.85);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #000000;
        --card-bg: #1c1c1e;
        --text-color: #ffffff;
        --text-color-secondary: #8e8e93;
        --border-color: #38383a;
        --accent-color: #0a84ff;
        --accent-color-light: #1c2f46;
        --danger-color: #ff453a;
        --blur-bg-light: rgba(28, 28, 30, 0.85);
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Noto Sans JP", sans-serif;
    display: grid;
    grid-template-areas: "header" "player" "content";
    grid-template-rows: auto auto 1fr;
    grid-template-columns: minmax(0, 1fr);
    height: 100vh;
    margin: 0;
    background: var(--bg-color);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
    overflow: hidden;
    transition: background-color 0.3s;
}

body.admin-mode {
    --bg-color: #eef2f5;
}

header {
    grid-area: header;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: var(--blur-bg-light);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 10;
}

header h1 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
    cursor: default;
    user-select: none;
    -webkit-user-select: none;
    transition: opacity 0.1s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}
header h1:active {
    opacity: 0.5;
}

#player-controls {
    grid-area: player;
    text-align: center;
    padding: 20px 20px 40px 20px;
    background: transparent;
    z-index: 10;
    width: 100%;
    box-sizing: border-box;
    min-width: 0; 
}

#playback-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    margin: 0 auto 20px auto;
    width: auto;
}

#prev-button, #next-button {
    background: none;
    border: none;
    padding: 10px;
    cursor: pointer;
    color: var(--text-color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, transform 0.1s;
}
#prev-button:active, #next-button:active {
    color: var(--accent-color);
    transform: scale(0.9);
}
#prev-button svg, #next-button svg {
    width: 32px;
    height: 32px;
    fill: currentColor;
}

#play-pause-button {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0, 122, 255, 0.4);
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}
#play-pause-button:active {
    transform: scale(0.9);
}
#play-pause-button svg {
    width: 48px;
    height: 48px;
    fill: white;
}
#play-pause-button .icon-pause,
#play-pause-button.is-playing .icon-play { display: none; }
#play-pause-button.is-playing .icon-pause,
#play-pause-button:not(.is-playing) .icon-play { display: block; }

#now-playing {
    font-weight: 500;
    color: var(--text-color);
    font-size: 1.1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 20px;
    opacity: 0.8;
    max-width: 100%;
    box-sizing: border-box;
    margin: 0 auto;
}

#content-area {
    grid-area: content;
    overflow-y: auto;
    padding: 20px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
#content-area::-webkit-scrollbar { display: none; }

#album-list-ul {
    list-style: none;
    padding: 0;
    margin: 0 0 40px 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
}

li[data-album-name] {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 110px;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    padding: 10px;
    text-align: center;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-color);
    transition: transform 0.1s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
li[data-album-name] span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

li[data-album-name]:active {
    transform: scale(0.96);
}
li[data-album-name].playing-album {
    background: var(--accent-color);
    color: white;
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 122, 255, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(0, 122, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 122, 255, 0); }
}

/* Admin Buttons Container */
.admin-controls {
    display: none; /* デフォルト非表示 */
    margin-top: 8px;
    gap: 8px;
}

/* Hide Button */
.hide-item-button {
    font-size: 0.75rem;
    padding: 4px 10px;
    background: var(--card-bg);
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    z-index: 2;
}

/* Rename Button */
.rename-item-button {
    font-size: 0.75rem;
    padding: 4px 10px;
    background: var(--card-bg);
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    z-index: 2;
}

li.playing-album .hide-item-button {
    border-color: white;
    color: var(--danger-color);
    background: white;
}
li.playing-album .rename-item-button {
    border-color: white;
    color: var(--accent-color);
    background: white;
}

li.is-hidden {
    opacity: 0.5;
    filter: grayscale(100%);
    background: #e5e5ea;
    color: #888;
}

#track-list-section {
    display: none;
    margin-top: 20px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}
#track-list-section h3 {
    font-size: 0.9rem;
    color: var(--text-color-secondary);
    margin: 0 0 10px 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}
#track-list {
    list-style: none;
    padding: 0;
}
#track-list li {
    padding: 12px 12px 12px 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

/* 再生中の曲のハイライト */
#track-list li.playing {
    color: var(--accent-color);
    font-weight: bold;
    background-color: var(--accent-color-light);
    border-left: 4px solid var(--accent-color);
    padding-left: 12px;
}

body.admin-mode .admin-controls {
    display: flex;
    justify-content: center;
}
body.admin-mode #track-list-section {
    display: block;
}

@media (min-width: 768px) {
    body {
        max-width: 600px;
        margin: 0 auto;
        border-left: 1px solid var(--border-color);
        border-right: 1px solid var(--border-color);
        grid-template-areas: "header" "player" "content";
        grid-template-columns: minmax(0, 1fr);
    }
}