/* ========================================
   Chapter Audio Player
   ======================================== */

.chap-audio-wrapper {
    margin: 10px auto 14px auto;
    max-width: 706.5px;
}

/* ── Trigger button ── */
.chap-listen-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: 1.5px solid var(--primary-color, #6366f1);
    color: var(--primary-color, #6366f1);
    border-radius: 24px;
    padding: 7px 18px 7px 14px;
    cursor: pointer;
    font-size: 13.5px;
    font-weight: 600;
    transition: all 0.2s ease;
    white-space: nowrap;
    letter-spacing: 0.2px;
}

.chap-listen-btn:hover:not(.state-loading) {
    background: var(--primary-color, #6366f1);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0,0,0,0.15);
}

.chap-listen-btn.state-playing {
    background: var(--primary-color, #6366f1);
    color: #fff;
    border-color: var(--primary-color, #6366f1);
}

.chap-listen-btn.state-paused {
    background: transparent;
    color: var(--primary-color, #6366f1);
    border-color: var(--primary-color, #6366f1);
    opacity: 0.8;
}

.chap-listen-btn.state-loading {
    opacity: 0.7;
    cursor: wait;
}

.chap-listen-icon {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.chap-listen-spinner {
    display: flex;
    align-items: center;
}

.chap-listen-spinner.hidden {
    display: none !important;
}

.chap-spin {
    animation: chapSpinAnim 0.8s linear infinite;
}

@keyframes chapSpinAnim {
    to { transform: rotate(360deg); }
}

/* ── Controls injected into reading-progress-indicator bar ── */
.chap-bar-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-inline-end: 10px;
    flex-shrink: 0;
}

.chap-bar-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.chap-bar-playpause {
    background: var(--primary-color, #6366f1);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.chap-bar-playpause:hover {
    filter: brightness(1.15);
    transform: scale(1.08);
}

.chap-bar-stop {
    background: transparent;
    color: var(--text-secondary, #6b7280);
    border: 1.5px solid var(--border-color, #e5e7eb);
}

.chap-bar-stop:hover {
    background: #fee2e2;
    color: #ef4444;
    border-color: #fca5a5;
}

.chap-bar-timer {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary, #6b7280);
    font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
    white-space: nowrap;
    min-width: 32px;
}

/* ── Floating mini-bar (mobile + always-on fallback) ── */
.chap-floating-controls {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 40px;
    padding: 8px 14px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    z-index: 200;
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), opacity 0.3s ease;
    pointer-events: none;
}

.chap-floating-controls.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: auto;
}

/* On desktop (reading bar visible), hide floating bar */
@media (min-width: 966px) {
    .chap-floating-controls {
        display: none !important;
    }
}

/* ========================================
   Karaoke Sentence Highlighting
   ======================================== */

.chap-karaoke-sentence {
    transition: background 0.3s ease, color 0.3s ease;
    border-radius: 3px;
    padding: 1px 0;
}

.chap-karaoke-sentence.chap-sentence-active {
    background: color-mix(in srgb, var(--primary-color, #6366f1) 15%, transparent);
    box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--primary-color, #6366f1) 50%, transparent);
}

/* Shimmer loading effect on text while generating */
.content-body.chap-tts-loading p {
    position: relative;
    overflow: hidden;
}

.content-body.chap-tts-loading p::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        color-mix(in srgb, var(--primary-color, #6366f1) 8%, transparent) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: chapShimmer 2s ease-in-out infinite;
    pointer-events: none;
    border-radius: 4px;
}

@keyframes chapShimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ========================================
   Cloud AI Pause Overlay
   ======================================== */

.chap-audio-pause-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.chap-audio-pause-overlay.hidden {
    display: none !important;
}

.chap-pause-card {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 20px;
    padding: 32px 36px;
    max-width: 440px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    position: relative;
}

.chap-pause-close {
    position: absolute;
    top: 12px;
    right: 14px;
    background: transparent;
    border: none;
    color: var(--text-secondary, #6b7280);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.chap-pause-close:hover {
    background: var(--border-color, #f3f4f6);
    color: var(--text-primary, #111);
}

.chap-pause-msg {
    color: var(--text-secondary, #6b7280);
    font-size: 14px;
    line-height: 1.7;
    margin: 0 0 24px 0;
}

.chap-pause-continue-btn {
    background: var(--primary-color, #6366f1);
    border: none;
    color: #fff;
    padding: 12px 32px;
    border-radius: 28px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(0,0,0,0.15);
}

.chap-pause-continue-btn:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

/* ========================================
   Dark theme support
   ======================================== */

[data-theme="dark"] .chap-floating-controls {
    background: var(--bg-primary, #1f2937);
    border-color: var(--border-color, #374151);
}

[data-theme="dark"] .chap-bar-stop {
    color: var(--text-secondary, #9ca3af);
    border-color: var(--border-color, #374151);
}

[data-theme="dark"] .chap-bar-stop:hover {
    background: rgba(239,68,68,0.15);
    color: #f87171;
    border-color: #f87171;
}

/* ========================================
   Voice Engine Picker
   ======================================== */

.chap-mode-picker {
    margin-top: 10px;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
}

.chap-mode-picker.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.chap-picker-inner {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 14px;
    padding: 16px 20px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    max-width: 380px;
}

.chap-picker-title {
    margin: 0 0 12px 0;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary, #6b7280);
    letter-spacing: 0.2px;
}

.chap-picker-options {
    display: flex;
    gap: 8px;
}

.chap-picker-opt {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 12px;
    border: 1.5px solid var(--border-color, #e5e7eb);
    border-radius: 12px;
    background: transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary, #1f2937);
}

.chap-picker-opt:hover {
    border-color: var(--primary-color, #6366f1);
    background: color-mix(in srgb, var(--primary-color, #6366f1) 5%, transparent);
    transform: translateY(-1px);
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
}

.chap-picker-opt:active {
    transform: translateY(0);
}

.chap-picker-cloud {
    border-color: color-mix(in srgb, var(--primary-color, #6366f1) 30%, transparent);
}

.chap-picker-label {
    font-size: 13.5px;
    font-weight: 600;
}

.chap-picker-note {
    font-size: 11px;
    color: var(--text-secondary, #9ca3af);
    font-weight: 400;
}

.chap-picker-remember {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-secondary, #9ca3af);
    cursor: pointer;
}

.chap-picker-remember input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--primary-color, #6366f1);
    cursor: pointer;
}

/* Dark theme */
[data-theme="dark"] .chap-picker-inner {
    background: var(--bg-primary, #1f2937);
    border-color: var(--border-color, #374151);
}

[data-theme="dark"] .chap-picker-opt {
    border-color: var(--border-color, #374151);
    color: var(--text-primary, #e5e7eb);
}

[data-theme="dark"] .chap-picker-opt:hover {
    border-color: var(--primary-color, #6366f1);
}

/* ========================================
   Mobile
   ======================================== */

@media (max-width: 965px) {
    .chap-audio-wrapper {
        margin: 8px 0 12px 0;
    }

    .chap-listen-btn {
        font-size: 13px;
        padding: 6px 14px 6px 12px;
    }

    .chap-picker-inner {
        max-width: 100%;
    }

    .chap-picker-options {
        gap: 6px;
    }

    .chap-picker-opt {
        padding: 12px 8px;
    }
}