/* TTS Reader - Elegant Article Listen Mode */

.tts-listen-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border: 1.5px solid #e0e0e0;
    border-radius: 24px;
    background: #fff;
    color: #555;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    margin-top: 12px;
}

.tts-listen-btn:hover {
    border-color: #0066cc;
    color: #0066cc;
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.12);
}

.tts-listen-btn.active {
    background: #0066cc;
    border-color: #0066cc;
    color: #fff;
}

.tts-listen-btn .tts-icon {
    font-size: 16px;
    transition: transform 0.2s;
}

.tts-listen-btn.active .tts-icon {
    animation: tts-pulse 1.5s ease-in-out infinite;
}

@keyframes tts-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

/* Sticky player bar */
.tts-player-bar {
    position: fixed;
    bottom: -80px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    border-top: 1px solid #eee;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 9999;
    transition: bottom 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.06);
}

.tts-player-bar.visible {
    bottom: 0;
}

.tts-player-bar .tts-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 600px;
    width: 100%;
}

.tts-control-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: #f0f0f0;
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all 0.2s;
}

.tts-control-btn:hover {
    background: #0066cc;
    color: #fff;
}

.tts-control-btn.tts-play-pause {
    width: 42px;
    height: 42px;
    background: #0066cc;
    color: #fff;
    font-size: 16px;
}

.tts-control-btn.tts-play-pause:hover {
    background: #004d99;
    transform: scale(1.05);
}

.tts-progress {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tts-progress-bar {
    width: 100%;
    height: 4px;
    background: #e8e8e8;
    border-radius: 2px;
    overflow: hidden;
}

.tts-progress-fill {
    height: 100%;
    background: #0066cc;
    border-radius: 2px;
    width: 0%;
    transition: width 0.3s;
}

.tts-progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: #999;
}

.tts-speed-btn {
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 12px;
    border: 1px solid #ddd;
    background: #fff;
    color: #666;
    cursor: pointer;
    transition: all 0.2s;
    min-width: 44px;
    text-align: center;
}

.tts-speed-btn:hover {
    border-color: #0066cc;
    color: #0066cc;
}

.tts-close-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: #999;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tts-close-btn:hover {
    color: #333;
    background: #f0f0f0;
}

/* === READING MODE: Dim/Highlight System === */

/* When reading, dim ALL text content */
.blog-content.tts-reading p,
.blog-content.tts-reading h2,
.blog-content.tts-reading h3,
.blog-content.tts-reading ul,
.blog-content.tts-reading ol,
.blog-content.tts-reading li,
.blog-content.tts-reading div,
.blog-content.tts-reading blockquote,
.blog-content.tts-reading figure {
    opacity: 0.35;
    transition: opacity 0.4s ease;
}

/* Active element gets full opacity */
.blog-content.tts-reading .tts-active {
    opacity: 1 !important;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.04), rgba(0, 102, 204, 0.08));
    border-radius: 6px;
    padding: 8px 12px;
    margin-left: -12px;
    margin-right: -12px;
}

/* When a li is active, also show the parent ul/ol */
.blog-content.tts-reading ul:has(.tts-active),
.blog-content.tts-reading ol:has(.tts-active) {
    opacity: 1 !important;
}

/* When a p or element inside a div (pro-tip, example-box) is active, show the parent */
.blog-content.tts-reading div:has(.tts-active),
.blog-content.tts-reading .pro-tip:has(.tts-active),
.blog-content.tts-reading .example-box:has(.tts-active) {
    opacity: 1 !important;
}

/* But still dim non-active siblings inside those containers */
.blog-content.tts-reading div:has(.tts-active) > *:not(.tts-active),
.blog-content.tts-reading .pro-tip:has(.tts-active) > *:not(.tts-active),
.blog-content.tts-reading .example-box:has(.tts-active) > *:not(.tts-active) {
    opacity: 0.35;
}

/* Active element inside container still full */
.blog-content.tts-reading div:has(.tts-active) > .tts-active,
.blog-content.tts-reading .pro-tip:has(.tts-active) > .tts-active,
.blog-content.tts-reading .example-box:has(.tts-active) > .tts-active {
    opacity: 1 !important;
}

/* JS-applied parent class (fallback for browsers without :has()) */
.blog-content.tts-reading .tts-parent-active {
    opacity: 1 !important;
}

.blog-content.tts-reading .tts-parent-active > *:not(.tts-active):not(.tts-parent-active) {
    opacity: 0.35;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .tts-player-bar {
        padding: 10px 16px;
    }
    
    .tts-progress-text {
        display: none;
    }
    
    .tts-listen-btn {
        font-size: 13px;
        padding: 6px 14px;
    }
}