@font-face {
    font-family: 'Inter';
    src: url('./fonts/Inter-Variable.ttf') format('truetype');
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
}

@font-face {
    font-family: 'Roboto Mono';
    src: url('./fonts/RobotoMono-Variable.ttf') format('truetype');
    font-style: normal;
    font-weight: 100 700;
    font-display: swap;
}

:root {
    --primary: #6366f1; /* Indigo */
    --primary-hover: #818cf8;
    --accent: #06b6d4; /* Cyan */
    --bg-color: #0f172a;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;

    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.05);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.36);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout helpers */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);

    --ui-pad: clamp(12px, 2.2vw, 20px);
    --ui-pad-compact: clamp(10px, 1.6vw, 16px);
    --ui-pad-mobile: 12px;
    --ui-gap: clamp(10px, 1.6vw, 16px);
    --ui-gap-tight: clamp(8px, 1.2vw, 12px);

    --sat: env(safe-area-inset-top);
    --sab: env(safe-area-inset-bottom);
    --sal: env(safe-area-inset-left);
    --sar: env(safe-area-inset-right);
}

html, body {
    width: 100%;
    height: 100%;
}

* {
    box-sizing: border-box;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    outline: none;
}

body {
    margin: 0;
    padding: 0;
    background: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    overflow: hidden;
    width: 100vw;
    height: 100dvh;
    height: var(--app-height, 100dvh);
    min-height: var(--app-height, 100dvh);
    font-size: 14px;
    line-height: 1.5;
}

button, input, select {
    font-family: inherit;
}

/* Better default focus (keyboard / accessibility) */
:focus-visible {
    outline: 2px solid rgba(99, 102, 241, 0.65);
    outline-offset: 2px;
}

/* Canvas Layer */
#cv {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    z-index: 0;
    pointer-events: none;
    display: block;
}

/* Video Layer */
.video-container {
    position: absolute;
    top: 100px; /* UIと被らないように初期位置を下に */
    left: 50%;
    transform: translateX(-50%);
    width: 320px;
    aspect-ratio: 16 / 9;
    z-index: 5;
    background: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
    resize: both;
    min-width: 160px;
    min-height: 90px;
    will-change: transform, top, left;
    backface-visibility: hidden;
    transform: translateX(-50%) translateZ(0);
    transition: top 0.3s, left 0.3s, width 0.3s, height 0.3s, border-radius 0.3s, transform 0.3s, opacity 0.3s;
    contain: strict;
}

.video-container.dragging {
    transition: none !important;
}

.video-container.background-mode {
    top: 0 !important;
    left: 0 !important;
    transform: none !important;
    width: 100dvw !important;
    height: 100dvh !important;
    z-index: -1;
    border-radius: 0;
    border: none;
    resize: none;
}

.video-container.background-mode .video-controls {
    display: none;
}

.video-container.hidden {
    display: none;
}

#bgVideo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
    image-rendering: auto;
    /* 画質低下防止 */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.video-container.background-mode #bgVideo {
    object-fit: cover;
}

.video-container.background-mode.fit-contain #bgVideo {
    object-fit: contain;
}

.video-container.background-mode.fit-fill #bgVideo {
    object-fit: fill;
}

/* Drag & Drop Feedback */
body.drag-over::after {
    content: 'ファイルをドロップして追加';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(99, 102, 241, 0.2);
    border: 4px dashed var(--primary);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    color: #fff;
    pointer-events: none;
}

.video-controls {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 30px;
    background: linear-gradient(to bottom, rgba(0,0,0,0.5), transparent);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 10px;
    opacity: 0;
    transition: opacity 0.2s;
}

.video-container:hover .video-controls {
    opacity: 1;
}

.video-handle {
    cursor: move;
    color: #fff;
    font-size: 18px;
}

.mini-btn {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    padding: 4px;
}

.action-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: #fff;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.action-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Help Tab Styles */
.shortcut-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.shortcut-list li {
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 12px;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.shortcut-list li span {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-weight: bold;
    color: var(--accent);
}

.help-section h3 {
    margin-bottom: 15px;
    color: var(--accent);
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 5px;
}

.color-preset-btn {
    height: 30px;
    border-radius: 4px;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: transform 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: #fff;
    text-shadow: 0 0 2px #000;
}
.color-preset-btn:hover {
    transform: scale(1.05);
}

/* UI Layer */
#uiLayer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--app-height, 100dvh);
    min-height: var(--app-height, 100dvh);
    z-index: 10;
    pointer-events: none;
    transition: opacity 0.4s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: calc(var(--ui-pad) + var(--safe-top)) calc(var(--ui-pad) + var(--safe-right)) calc(var(--ui-pad) + var(--safe-bottom)) calc(var(--ui-pad) + var(--safe-left));
}

#uiLayer.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* When UI is hidden, nothing inside it should ever receive pointer events. */
#uiLayer.hidden, #uiLayer.hidden * {
    pointer-events: none !important;
}

#uiLayer > * {
    pointer-events: auto;
}

/* Persistent Controls */
#persistentControls {
    position: fixed;
    top: calc(20px + var(--safe-top));
    right: calc(20px + var(--safe-right));
    display: flex;
    gap: 12px;
    z-index: 1001;
    transition: var(--transition);
    pointer-events: auto;
}

#uiLayer.hidden ~ #persistentControls {
    opacity: 0.5;
}

#uiLayer.hidden ~ #persistentControls:hover {
    opacity: 1;
}

/* Adjust Top Bar to make space for persistent controls */
.top-bar {
    padding-right: 140px; /* Space for fixed buttons (desktop) */
}

/* Glassmorphism Utility */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    background-image: linear-gradient(to bottom right, var(--glass-highlight), transparent);
}
.hint {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 6px 0;
}
.storage-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}
.storage-actions .mini-btn {
    flex: 1;
    min-width: 120px;
    white-space: nowrap;
    padding: 8px 12px;
}
.storage-list {
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 8px;
    background: rgba(255,255,255,0.02);
    max-height: 260px;
    overflow-y: auto;
}
.storage-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px;
    border-bottom: 1px solid var(--glass-border);
}
.storage-item:last-child {
    border-bottom: none;
}
.storage-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.icon-btn.danger {
    color: #f87171;
    border-color: #f87171;
}

/* Top Bar */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    margin-bottom: auto; /* Push to top */
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    flex-shrink: 0;
}
.status-display {
    display: flex;
    flex-direction: column;
    min-width: 0; /* For text truncation */
}

.now-playing-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.now-playing-art-sm {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.35), rgba(79, 172, 254, 0.25));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.now-playing-meta {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.next-up-text {
    font-size: 0.72rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: left;
    margin-top: 2px;
}

#statusText {
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-main);
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

#timeDisplay {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'Roboto Mono', monospace;
    margin-top: 2px;
}

.top-controls {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-shrink: 0;
}

/* Input Toggle Group */
.input-toggle-group {
    display: flex;
    background: rgba(0, 0, 0, 0.3);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
}

.toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.toggle-btn:hover {
    color: var(--text-main);
}

.toggle-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

/* Icon Buttons */
.icon-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    line-height: 1;
    transition: var(--transition);
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.icon-btn.active {
    color: var(--accent);
    background: rgba(6, 182, 212, 0.15);
    border-color: var(--accent);
}

.icon-btn:active {
    transform: translateY(1px);
}

/* Bottom Controls (Floating) */
.controls-bar {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 900px;
    margin: 0 auto; /* Center horizontally */
    flex-shrink: 0;
}

/* Prevent accidental text selection when dragging ranges on mobile */
input[type="range"] {
    touch-action: pan-y;
}

/* Progress Bar */
.progress-container {
    width: 100%;
    height: 6px;
    position: relative;
    display: flex;
    align-items: center;
}


.seek-track {
    position: absolute;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    overflow: hidden;
    pointer-events: none;
}

.seek-buffer {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0%;
    background: rgba(255, 255, 255, 0.2);
}

.seek-fill {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0%;
    background: linear-gradient(90deg, rgba(79, 172, 254, 0.9), rgba(99, 102, 241, 0.9));
}

.now-playing {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 12px;
    align-items: center;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--glass-border);
}

.now-playing-art {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.35), rgba(79, 172, 254, 0.25));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.now-playing-text {
    min-width: 0;
}

.now-playing-title {
    font-weight: 600;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.now-playing-artist {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.now-playing-index {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.progress-container.hidden { display: none; }

input[type=range] {
    appearance: none;
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    cursor: pointer;
    height: 20px; /* Hit area */
    margin: 0;
}

input[type=range]:focus {
    outline: none;
}

/* Custom Range Track & Thumb */
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    transition: var(--transition);
}

input[type=range]:hover::-webkit-slider-runnable-track {
    background: rgba(255, 255, 255, 0.3);
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 14px;
    width: 14px;
    border-radius: 50%;
    background: var(--text-main);
    margin-top: -5px; /* Center thumb */
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    transition: var(--transition);
}

input[type=range]:hover::-webkit-slider-thumb {
    box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

/* Main Controls Row */
.main-controls {
    /* Use grid so the center group stays truly centered even if left/right widths differ */
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    column-gap: 16px;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
}

.control-group.left {
    justify-content: flex-start;
    justify-self: start;
}

.control-group.center {
    flex: 0 0 auto;
    justify-content: center;
    gap: 24px;
    justify-self: center;
}

.control-group.right {
    justify-content: flex-end;
    justify-self: end;
}

.control-group.hidden {
    visibility: hidden;
    pointer-events: none;
}

/* Playback Buttons */
.ctrl-btn {
    background: transparent;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border-radius: 50%;
    padding: 0;
    line-height: 1;
}

.ctrl-btn.sm {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    background: rgba(255, 255, 255, 0.05);
}

.ctrl-btn.sm:hover {
    background: rgba(255, 255, 255, 0.15);
}

.ctrl-btn.play-btn {
    width: 64px;
    height: 64px;
    font-size: 1.8rem;
    background: var(--primary);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.ctrl-btn.play-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.ctrl-btn.play-btn:active {
    transform: scale(0.95);
}

/* Volume */
.volume-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 120px;
}

#volIcon {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

/* Select Dropdown */
select {
    appearance: none;
    background-color: rgba(0, 0, 0, 0.3);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
    padding: 8px 32px 8px 16px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23fff' d='M6 8.825L1.175 4 2.238 2.938 6 6.7l3.763-3.762L10.825 4z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    transition: var(--transition);
}

select:hover {
    background-color: rgba(0, 0, 0, 0.5);
    border-color: rgba(255, 255, 255, 0.2);
}

select option {
    background-color: var(--bg-color);
    color: var(--text-main);
}

/* Playlist Panel */
.playlist-panel {
    position: absolute;
    top: 80px;
    left: 20px;
    width: 400px;
    max-width: calc(100vw - 40px);
    max-height: calc(var(--app-height, 100vh) - 240px);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    z-index: 1005;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

@media (max-width: 900px) and (orientation: portrait) {
    .playlist-panel {
        max-height: calc(var(--app-height, 100vh) - 300px);
    }
    .controls-bar {
        padding: 16px;
        gap: 12px;
    }
    .main-controls {
        flex-wrap: wrap;
        gap: 10px;
    }
}

.playlist-panel.collapsed {
    display: none;
}

/* Improve tap targets inside playlist header on touch devices */
.playlist-actions .icon-btn.sm {
    width: 36px;
    height: 36px;
    text-align: right;
}

.playlist-header {
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 2;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.playlist-header h3 {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}

.playlist-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: nowrap;
    flex-shrink: 0;
}
/* Ensure tappable targets on small screens */
@media (max-width: 768px) {
    /* Only enlarge tap targets where we explicitly want it (playlist header). */
    .playlist-actions .icon-btn {
        min-width: 44px;
        min-height: 44px;
    }
}
.playlist-actions::-webkit-scrollbar { display: none; }

.playlist-header #closePlaylistBtn {
    flex-shrink: 0;
}

.playlist-search {
    position: sticky;
    top: 58px;
    z-index: 1;
    background: rgba(10, 10, 15, 0.6);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.file-btn {
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.playlist-items {
    overflow-y: auto;
    flex: 1;
    padding: 6px;
}

.playlist-search {
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--glass-border);
}

.playlist-search input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    color: var(--text-main);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.playlist-search input:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.1);
}

.playlist-items::-webkit-scrollbar {
    width: 6px;
}
.playlist-items::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.playlist-item {
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: default;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    margin-bottom: 2px;
    background: rgba(255, 255, 255, 0.02);
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

.playlist-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.playlist-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
    border: 1px solid rgba(99, 102, 241, 0.3);
    font-weight: 600;
}

.playlist-item.dragging {
    opacity: 0.5;
    background: rgba(99, 102, 241, 0.3);
}

/* タッチ操作時のみ pointer-events を無効化して背後の要素を判定可能にする */
.playlist-item.touch-dragging {
    pointer-events: none;
}

.playlist-item.drag-over {
    background: rgba(99, 102, 241, 0.4);
    border: 1px dashed var(--primary);
}

.drag-handle {
    color: var(--text-main);
    cursor: grab;
    margin-right: 8px;
    font-size: 1.2rem;
    opacity: 0.8;
    transition: opacity 0.2s;
    user-select: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    touch-action: none;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.playlist-item:hover .drag-handle {
    opacity: 1;
}

/* タッチデバイスでハンドルを常に見やすく表示 */
@media (hover: none) {
    .drag-handle {
        opacity: 0.9;
    }
}

.track-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.playlist-item .name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.9rem;
}

.item-actions {
    display: flex;
    gap: 2px;
    align-items: center;
    opacity: 0;
    transition: var(--transition);
}

.playlist-item:hover .item-actions {
    opacity: 1;
}

.move-btn, .remove-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border-radius: var(--radius-sm);
}

.move-btn:hover {
    color: var(--primary);
    background: rgba(255, 255, 255, 0.1);
}

.remove-btn:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

/* タッチデバイスではアクションを常に表示 */
@media (hover: none) {
    .item-actions {
        opacity: 1;
    }
}

.playlist-empty {
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Overlay Message */
.overlay-msg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 16px 32px;
    border-radius: var(--radius-full);
    font-size: 1.2rem;
    pointer-events: none;
    transition: opacity 0.4s;
    backdrop-filter: blur(4px);
    z-index: 100;
}
.overlay-msg.hidden { opacity: 0; }
.overlay-msg.fade-out { opacity: 0; }

/* Sleep Timer Buttons */
.sleep-btn {
    padding: 5px 12px;
    border: 1px solid var(--glass-border);
    background: rgba(255,255,255,0.08);
    color: var(--text-main);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
}
.sleep-btn:hover { background: rgba(255,255,255,0.15); }
.sleep-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* Settings Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85); /* Darker background, removed backdrop-filter for performance */
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.modal.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    width: 90%;
    max-width: 550px;
    height: 650px; /* Fixed height for stability */
    max-height: 90vh;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    background: #1a1a20; /* Solid background to prevent transparency lag */
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        scroll-behavior: auto !important;
    }

    .icon-btn:hover {
        transform: none;
    }
}

.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 { margin: 0; font-size: 1.2rem; }

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}
.close-btn:hover { color: var(--text-main); }

.tabs {
    display: flex;
    flex-wrap: wrap;
    padding: 6px 8px 4px 8px;
    border-bottom: 1px solid var(--glass-border);
    background: transparent;
    gap: 6px 8px;
    overflow-x: visible;
    scrollbar-width: none;
    width: 100%;
    flex-shrink: 0; /* Prevent squashing */
    min-height: 40px; /* Ensure minimum height */
    align-items: center;
    row-gap: 6px;
}
.tabs::-webkit-scrollbar { display: none; }

.tab-btn {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    background: transparent;
    gap: 8px 6px;
    font-weight: 600;
    font-size: 0.88rem;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
    border-radius: 6px;
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: rgba(99,102,241,0.06);
}

.tab-btn:hover {
    background: rgba(255,255,255,0.02);
}

.tab-content {
    display: none;
    padding: 20px 24px;
    overflow-y: auto;
    flex: 1;
    min-height: 0; /* Flexbox scroll fix */
    width: 100%;
    box-sizing: border-box;
}
.tab-content.active { display: block; }

    /* Compact spacing for Developer message (tighter) */
    #developerMessageContent { padding: 6px; line-height: 1.2; font-size: 0.9rem; }
    #developerMessageContent p { margin: 0 0 6px 0; }
    #developerMessageContent h2, #developerMessageContent h3, #developerMessageContent h4 { margin: 6px 0 4px; }
    #developerMessageContent ul, #developerMessageContent ol { margin: 4px 0; padding-left: 18px; }
    #developerMessageContent li { margin-bottom: 2px; }
    #developerMessageContent pre { margin: 6px 0; padding: 6px; border-radius: 3px; }

.settings-section-title {
    margin: 14px 0 10px;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.setting-item {
    margin-bottom: 20px;
    width: 100%;
    box-sizing: border-box;
}

.setting-item .range-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.setting-item .range-wrapper input {
    flex: 1;
    min-width: 0;
}

.setting-item .range-wrapper span {
    min-width: 45px;
    text-align: right;
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--primary);
    flex-shrink: 0;
}

.setting-item label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.setting-item select, 
.setting-item input[type="text"],
.setting-item input[type="password"],
.setting-item input[type="color"] {
    width: 100%;
    box-sizing: border-box;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.1);
}

#saveSettingsBtn {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 8px 24px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}
#saveSettingsBtn:hover { background: var(--primary-hover); }

#resetAllSettingsBtn {
    background: rgba(239, 68, 68, 0.1) !important;
    border: 1px solid rgba(239, 68, 68, 0.3) !important;
    color: #ef4444 !important;
    padding: 8px 16px !important;
    border-radius: var(--radius-sm) !important;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}
#resetAllSettingsBtn:hover {
    background: rgba(239, 68, 68, 0.2) !important;
    border-color: #ef4444 !important;
}

#playlistToggle {
    margin-left: auto;
}

.btn-icon {
    width: 100%;       /* ボタンの横幅いっぱいに広げる */
    height: 100%;      /* ボタンの縦幅いっぱいに広げる */
    max-width: 24px;   /* 必要に応じて！元の四角と同じくらいの最大横幅（例: 16px〜24px） */
    max-height: 24px;  /* 必要に応じて！元の四角と同じくらいの最大縦幅（例: 16px〜24px） */
    object-fit: contain; /* 縦横比を崩さずに綺麗に収める */
    vertical-align: middle; /* 文字の並びと同じ高さに揃える */
}

/* Responsive */
@media (max-width: 768px) {
    /* Keep the fixed buttons from overlapping the title/status on small screens */
    #persistentControls {
        top: calc(12px + var(--safe-top));
        right: calc(12px + var(--safe-right));
        gap: 8px;
    }

    .icon-btn {
        width: 34px;
        height: 34px;
        font-size: 0.9rem;
    }

    .top-bar {
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        padding: calc(12px + var(--safe-top)) 12px 8px;
        gap: 8px;
    }
    .status-display {
        text-align: center;
        width: 100%;
        min-width: 0;
        order: 1;
    }
    .top-controls {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-shrink: 0;
        order: 2;
    }

    .controls-bar {
        /* Make padding symmetric so horizontal space matches both edges */
        padding: 12px;
        gap: 10px;
    }

    /* Stack controls vertically to avoid squashing and let each row breathe */
    .main-controls {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .control-group {
        min-width: 0;
        width: 100%;
        justify-content: space-between;
    }

    .control-group.left {
        order: 1;
        display: flex;
        gap: 8px;
        justify-content: flex-start;
    }
    .control-group.center {
        order: 2;
        display: flex;
        flex-wrap: nowrap;
        gap: 10px;
        justify-content: center;
        align-items: center;
        overflow-x: auto;
        scroll-padding-left: 12px;
        scroll-padding-right: 24px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        margin: 0;
        width: 100%;
    }
    .control-group.center::-webkit-scrollbar {
        display: none;
    }
    .control-group.right {
        order: 3;
        display: flex;
        gap: 8px;
        justify-content: flex-end;
    }

    .ctrl-btn.play-btn {
        width: 60px;
        height: 60px;
        font-size: 1.7rem;
    }

    .ctrl-btn.sm {
        width: 36px;
        height: 36px;
        font-size: 0.95rem;
        flex-shrink: 0;
    }

    .icon-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    /* Playback controls: keep buttons square and prevent shrinking/cropping */
    #playbackControls > button {
        flex: 0 0 auto;
    }
    #playbackControls .icon-btn,
    #playbackControls .ctrl-btn.sm {
        width: 40px;
        height: 40px;
        min-width: 40px;
        min-height: 40px;
        line-height: 1;
    }
    #playbackControls .ctrl-btn.play-btn {
        width: 56px;
        height: 56px;
        min-width: 56px;
        min-height: 56px;
        line-height: 1;
    }

    .volume-controls {
        display: none; /* Hide volume slider on mobile to save space, use system volume */
    }

    .mode-select {
        min-width: 120px;
        font-size: 0.85rem;
        padding: 6px 10px;
    }

    /* Playlist becomes a bottom sheet on mobile */
    .playlist-panel {
        position: fixed;
        left: 12px;
        right: 12px;
        top: auto;
        bottom: calc(150px + var(--safe-bottom));
        width: auto;
        max-height: min(70vh, calc(100vh - 200px));
        border-radius: var(--radius-lg);
        z-index: 1005;
    }
}

/* Portrait mode: move playlist to top (below UI) to avoid overlapping controls */
@media (max-width: 768px) and (orientation: portrait) {
    .playlist-panel {
        position: fixed;
        left: 12px;
        right: 12px;
        top: var(--playlist-top, calc(100px + var(--safe-top)));
        bottom: auto;
        width: auto;
        max-height: min(60vh, calc(100vh - 360px));
        border-radius: var(--radius-lg);
        z-index: 1005;
    }

    .playlist-items {
        padding: 4px;
    }

    .playlist-item {
        padding: 6px 10px;
        margin-bottom: 2px;
    }

    .playlist-header {
        padding: 8px 10px;
        gap: 8px;
        flex-wrap: nowrap;
    }
    
    .playlist-header h3 {
        font-size: 0.85rem;
    }

    .playlist-actions {
        display: flex;
        justify-content: flex-end; /* 要素をすべて右端に寄せる */
        gap: 8px;                  /* 必要に応じてボタン同士の間隔を調整 */
        flex-grow: 1;
    }

    .volume-controls {
        width: min(220px, 45vw);
    }

    /* Settings modal sizing on phones (non-fullscreen) */
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }

    .modal-header, .modal-footer {
        padding: 12px 16px;
    }

    .tab-content {
        padding: 12px 16px;
    }

    .setting-item {
        margin-bottom: 16px;
    }
}

@media (max-width: 520px) {
    #uiLayer {
        padding: calc(var(--ui-pad-mobile) + var(--safe-top)) calc(var(--ui-pad-mobile) + var(--safe-right)) calc(var(--ui-pad-mobile) + var(--safe-bottom)) calc(var(--ui-pad-mobile) + var(--safe-left));
    }

    .ctrl-btn.play-btn {
        width: 60px;
        height: 60px;
        font-size: 1.7rem;
    }

    .control-group.center {
        gap: 14px;
    }

    .control-group.right {
        width: 100%;
        justify-content: space-between;
    }

    .mode-select {
        flex: 1;
        min-width: 0;
    }

    .volume-controls {
        width: min(240px, 60vw);
    }

    /* Settings modal should feel native on phones */
    .modal-content {
        width: 100%;
        height: 100%;
        max-width: none;
        max-height: none;
        border-radius: 0;
    }
}

/* Phone landscape: keep controls reachable and playlist unobtrusive */
@media (max-width: 768px) and (orientation: landscape) and (max-height: 520px) {
    .top-bar {
        padding: calc(44px + var(--safe-top)) 12px 10px;
        gap: 8px;
    }

    .controls-bar {
        padding: 12px;
        gap: 10px;
    }

    .main-controls {
        display: flex;
        flex-wrap: nowrap;
        gap: 10px;
    }

    .control-group.center {
        width: auto;
        margin-bottom: 0;
        gap: 16px;
        order: 2;
    }

    .control-group.left { order: 1; }
    .control-group.right { order: 3; }

    .playlist-panel {
        left: auto;
        right: 12px;
        top: calc(12px + var(--safe-top));
        bottom: calc(120px + var(--safe-bottom));
        width: min(420px, 46vw);
        max-height: none;
    }
}
/* Sort Dropdown */
.sort-dropdown {
    position: relative;
    display: inline-block;
}
.sort-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    min-width: 160px;
    z-index: 10000;
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    margin-top: 5px;
}
.sort-menu.show {
    display: block;
}
.sort-option {
    display: block;
    width: 100%;
    padding: 10px 14px;
    background: none;
    border: none;
    color: var(--text-main);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}
.sort-option:hover, .sort-option:active {
    background: rgba(255, 255, 255, 0.1);
}

/* Hint text for settings */
.hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 8px;
    display: block;
    margin-top: 4px;
}
/* __videoContainerCenterFix */
.video-container {
  transform: translateX(-50%) translateZ(0);
}