/* ===================================================
   Lyrics Scroll Mode - YouTube sync lyrics viewer
   Theme-aware: uses CSS variables for all colors
   =================================================== */

/* --- Body scroll lock when overlay is open --- */
body.overlay-open {
    overflow: hidden;
}

/* --- Main Container --- */
.lyrics-scroll {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 720px;
    height: 100%;
    margin: 0 auto;
    position: relative;
}

/* --- YouTube Player --- */
.lyrics-scroll-player-wrap {
    flex-shrink: 0;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: 8px 8px 0 0;
    overflow: hidden;
}

.lyrics-scroll-player-wrap iframe {
    width: 100%;
    height: 100%;
}

/* Player size variants */
.lyrics-scroll-player-wrap.player-medium {
    width: 50%;
    aspect-ratio: 16 / 9;
    margin: 0 auto;
}

.lyrics-scroll-player-wrap.player-small {
    width: 30%;
    aspect-ratio: 16 / 9;
    margin: 0 auto;
}

.lyrics-scroll-player-wrap.player-audio {
    width: 0;
    height: 0;
    overflow: hidden;
    position: absolute;
    pointer-events: none;
}

.lyrics-scroll-player-wrap.player-none {
    display: none;
}

/* --- Controls Bar --- */
.lyrics-scroll-controls {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background: var(--player-surface);
    border-bottom: 1px solid var(--player-border);
    user-select: none;
    -webkit-user-select: none;
}

.lyrics-scroll-controls-left {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.lyrics-scroll-controls-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lyrics-scroll-ctrl-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.lyrics-scroll-ctrl-btn:hover {
    background: var(--player-hover);
    color: var(--text-primary);
}

.lyrics-scroll-play-btn {
    width: 48px;
    height: 48px;
    font-size: 1.4rem;
    background: var(--player-surface);
}

.lyrics-scroll-play-btn:hover {
    background: var(--player-surface-strong);
}

.lyrics-scroll-kana-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.lyrics-scroll-kana-btn i {
    font-size: 0.9rem;
}

.lyrics-scroll-kana-btn:hover {
    border-color: rgba(var(--accent-rgb), 0.4);
    color: var(--text-primary);
}

.lyrics-scroll-kana-btn.active {
    background: rgba(var(--accent-rgb), 0.1);
    border-color: rgba(var(--accent-rgb), 0.5);
    color: var(--accent);
}

/* --- Speed Button --- */
.lyrics-scroll-speed-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    min-width: 42px;
}

.lyrics-scroll-speed-btn:hover {
    border-color: rgba(var(--accent-rgb), 0.4);
    color: var(--text-primary);
}

.lyrics-scroll-speed-btn.active {
    background: rgba(var(--accent-rgb), 0.08);
    border-color: rgba(var(--accent-rgb), 0.4);
    color: var(--accent);
}

.lyrics-scroll-speed-btn.flash {
    background: rgba(var(--accent-rgb), 0.2);
    color: var(--accent);
    transform: scale(1.1);
}

/* --- Repeat Button --- */
.lyrics-scroll-repeat-btn {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.375rem 0.65rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.lyrics-scroll-repeat-btn i {
    font-size: 0.85rem;
}

.lyrics-scroll-repeat-btn:hover {
    border-color: rgba(var(--accent-rgb), 0.4);
    color: var(--text-primary);
}

.lyrics-scroll-repeat-btn.active {
    background: rgba(100, 180, 255, 0.15);
    border-color: rgba(100, 180, 255, 0.5);
    color: #64b4ff;
}

/* --- Video Size Button & Dropdown --- */
.lyrics-scroll-video-size-wrap {
    position: relative;
}

.lyrics-scroll-video-btn {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.375rem 0.65rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.lyrics-scroll-video-btn i {
    font-size: 0.85rem;
}

.lyrics-scroll-video-btn:hover,
.lyrics-scroll-video-btn[aria-expanded="true"] {
    border-color: rgba(var(--accent-rgb), 0.4);
    color: var(--text-primary);
}

.lyrics-scroll-video-size-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    display: flex;
    flex-direction: column;
    background: var(--player-menu-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    z-index: 100;
    min-width: 70px;
    box-shadow: var(--player-menu-shadow);
}

.video-size-option {
    padding: 0.5rem 0.85rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    text-align: center;
    white-space: nowrap;
}

.video-size-option:hover {
    background: var(--player-hover);
    color: var(--text-primary);
}

.video-size-option.selected {
    background: rgba(100, 180, 255, 0.2);
    color: #64b4ff;
    font-weight: 600;
}

/* --- Typing Link Button --- */
.lyrics-scroll-typing-link {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    border: 1px solid rgba(var(--accent-rgb), 0.4);
    border-radius: 20px;
    background: rgba(var(--accent-rgb), 0.1);
    color: rgba(var(--accent-rgb), 0.9);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.lyrics-scroll-typing-link i {
    font-size: 0.85rem;
}

.lyrics-scroll-typing-link:hover {
    background: rgba(var(--accent-rgb), 0.2);
    border-color: rgba(var(--accent-rgb), 0.6);
    color: var(--accent);
}

/* --- Progress Bar --- */
.lyrics-scroll-progress {
    flex-shrink: 0;
    height: 4px;
    background: var(--player-surface);
    cursor: pointer;
    position: relative;
    /* タップ領域を広げる（視覚的な高さは変えない） */
    padding: 8px 0;
    margin: -8px 0;
    background-clip: content-box;
    -webkit-touch-callout: none;
}

.lyrics-scroll-progress:hover .lyrics-scroll-progress-fill {
    transform: scaleY(1.5);
}

.lyrics-scroll-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent, #e84898);
    border-radius: 0 2px 2px 0;
    transition: width 0.1s linear;
    transform-origin: bottom;
    pointer-events: none;
}

/* --- AB Repeat: Setting Mode (waiting for A or B click) --- */
.lyrics-scroll.repeat-setting .lyrics-line {
    cursor: crosshair;
}

.lyrics-scroll.repeat-setting .lyrics-line:hover {
    background: rgba(100, 180, 255, 0.1);
    border-left-color: rgba(100, 180, 255, 0.5);
}

/* --- AB Repeat Range Highlight --- */
.lyrics-line.repeat-range {
    background: rgba(100, 180, 255, 0.06) !important;
}

.lyrics-line.repeat-a,
.lyrics-line.repeat-b {
    border-left-color: #64b4ff !important;
}

.lyrics-line.repeat-a .lyrics-line-text::before,
.lyrics-line.repeat-b .lyrics-line-text::before {
    display: inline-block;
    width: 1.2em;
    margin-right: 0.25em;
    font-size: 0.65rem;
    font-weight: 700;
    color: #64b4ff;
    vertical-align: middle;
}

.lyrics-line.repeat-a .lyrics-line-text::before {
    content: "A";
}

.lyrics-line.repeat-b .lyrics-line-text::before {
    content: "B";
}

/* Repeat range lines: override past opacity so range stays visible */
.lyrics-line.repeat-range.past {
    opacity: 0.55;
}

/* --- Lyrics Area --- */
.lyrics-scroll-area {
    flex: 1;
    overflow-y: auto;
    padding: 0 1.5rem;

    /* Scrollbar styling */
    scrollbar-width: thin;
    scrollbar-color: var(--player-scrollbar) transparent;
}

.lyrics-scroll-area::-webkit-scrollbar {
    width: 6px;
}

.lyrics-scroll-area::-webkit-scrollbar-track {
    background: transparent;
}

.lyrics-scroll-area::-webkit-scrollbar-thumb {
    background: var(--player-scrollbar);
    border-radius: 3px;
}

.lyrics-scroll-area::-webkit-scrollbar-thumb:hover {
    background: var(--player-scrollbar-hover);
}

/* Spacers allow first/last lines to be centered */
.lyrics-scroll-spacer {
    height: 35vh;
}

/* --- Lyrics Lines --- */
.lyrics-line {
    padding: 0.625rem 1rem;
    margin: 0.125rem 0;
    border-radius: 8px;
    border-left: 3px solid transparent;
    cursor: pointer;
    transition: opacity 0.4s ease, border-color 0.3s ease, background 0.3s ease,
                transform 0.3s ease, padding-left 0.3s ease;
    opacity: 0.75;
}

.lyrics-line:hover {
    background: var(--player-surface);
}

/* Tap feedback (press feel) */
.lyrics-line:active {
    transform: scale(0.98);
    transition-duration: 0.05s;
}

/* Past lines */
.lyrics-line.past {
    opacity: 0.3;
}

/* Current line */
.lyrics-line.current {
    opacity: 1;
    border-left-color: var(--accent, #e84898);
    background: linear-gradient(90deg, rgba(var(--accent-rgb), 0.1) 0%, transparent 60%);
    padding-left: 1.25rem;
    transform: scale(1.02);
}

.lyrics-line.current .lyrics-line-text {
    font-weight: 700;
    font-size: 1.2em;
    color: var(--text-primary);
    text-shadow: 0 0 20px rgba(var(--accent-rgb), 0.3);
}

/* Upcoming lines */
.lyrics-line.upcoming {
    opacity: 0.75;
}

/* Line text */
.lyrics-line-text {
    font-size: 1.05rem;
    line-height: 1.5;
    color: var(--text-primary);
    transition: font-size 0.3s ease, font-weight 0.3s ease, color 0.3s ease;
}

/* Kana sub-line */
.lyrics-line-kana {
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--text-muted);
    margin-top: 0.125rem;
    letter-spacing: 0.02em;
}

.lyrics-line.current .lyrics-line-kana {
    color: var(--text-secondary);
}

/* --- Return to Current Button --- */
.lyrics-scroll-return-btn {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    background: var(--player-float-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    z-index: 10;
    transition: all 0.2s;
    box-shadow: var(--player-float-shadow);
}

.lyrics-scroll-return-btn:hover {
    background: var(--player-surface-strong);
    border-color: rgba(var(--accent-rgb), 0.3);
    color: var(--text-primary);
}

/* --- Loading State --- */
.lyrics-scroll-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
}

.lyrics-scroll-loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--player-spinner-track);
    border-top-color: var(--accent, #e84898);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* --- Empty State --- */
.lyrics-scroll-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* --- 動画エラー表示 --- */
.lyrics-scroll-video-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem 1rem;
    text-align: center;
}

.lyrics-scroll-video-error i {
    font-size: 2rem;
    color: #f0a030;
}

.lyrics-scroll-video-error p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* === Responsive === */
@media (max-width: 640px) {
    .lyrics-scroll {
        max-width: 100%;
    }

    .lyrics-scroll-player-wrap {
        border-radius: 0;
    }

    .lyrics-scroll-controls {
        padding: 0.375rem 0.75rem;
    }

    .lyrics-scroll-ctrl-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .lyrics-scroll-play-btn {
        width: 42px;
        height: 42px;
        font-size: 1.2rem;
    }

    .lyrics-scroll-area {
        padding: 0 1rem;
    }

    .lyrics-line {
        padding: 0.5rem 0.75rem;
    }

    .lyrics-line-text {
        font-size: 0.95rem;
    }

    .lyrics-line.current .lyrics-line-text {
        font-size: 1.1em;
    }

    .lyrics-scroll-return-btn {
        bottom: 1rem;
        font-size: 0.75rem;
        padding: 0.4rem 1rem;
    }

    .lyrics-scroll-speed-btn {
        font-size: 0.7rem;
        min-width: 38px;
        padding: 0.2rem 0.4rem;
    }

    .lyrics-scroll-repeat-btn,
    .lyrics-scroll-kana-btn,
    .lyrics-scroll-video-btn,
    .lyrics-scroll-typing-link {
        font-size: 0.7rem;
        padding: 0.3rem 0.5rem;
        gap: 0.25rem;
    }

    .lyrics-scroll-typing-link span {
        display: none;
    }
}