/**
 * TTS Voice Reader - Audio Player Stylesheet
 * Phong cách Swagger / Technical Minimalist: Đơn giản, trung tính, thanh lịch, chuẩn Responsive Web
 */

:root {
    --tts-primary: #0f172a;
    --tts-primary-hover: #1e293b;
    --tts-bg: #ffffff;
    --tts-card-border: #e5e7eb;
    --tts-text-main: #111827;
    --tts-text-sub: #6b7280;
    --tts-progress-bg: #e5e7eb;
    --tts-progress-fill: #0f172a;
    --tts-control-bg: #f3f4f6;
    --tts-control-border: #e5e7eb;
    --tts-active-bg: #ffffff;
}

/* Dark Mode nếu theme của website hỗ trợ */
@media (prefers-color-scheme: dark) {
    :root {
        --tts-primary: #f8fafc;
        --tts-primary-hover: #e2e8f0;
        --tts-bg: #1e293b;
        --tts-card-border: #334155;
        --tts-text-main: #f8fafc;
        --tts-text-sub: #94a3b8;
        --tts-progress-bg: #334155;
        --tts-progress-fill: #f8fafc;
        --tts-control-bg: #0f172a;
        --tts-control-border: #334155;
        --tts-active-bg: #1e293b;
    }
}

.tts-player-wrapper {
    margin: 16px 0 20px 0;
    width: 100%;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.tts-player-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: var(--tts-bg);
    border: 1px solid var(--tts-card-border);
    border-radius: 6px;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    box-sizing: border-box;
}

/* Nút Play / Pause tối giản */
.tts-play-btn {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 6px;
    background: var(--tts-primary);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.15s ease;
    padding: 0;
    outline: none;
}

@media (prefers-color-scheme: dark) {
    .tts-play-btn {
        color: #0f172a;
    }
}

.tts-play-btn:hover {
    background: var(--tts-primary-hover);
}

.tts-play-btn:focus-visible {
    box-shadow: 0 0 0 2px #2563eb;
}

/* Khối Timeline & Thông tin giữa */
.tts-track-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 120px;
}

.tts-track-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    line-height: 1.2;
}

.tts-track-title {
    font-weight: 600;
    color: var(--tts-text-main);
    letter-spacing: -0.01em;
}

.tts-time-display {
    font-variant-numeric: tabular-nums;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 11px;
    color: var(--tts-text-sub);
}

.tts-time-separator {
    margin: 0 2px;
    opacity: 0.6;
}

/* Thanh trượt bài đọc */
.tts-timeline {
    width: 100%;
    height: 16px;
    display: flex;
    align-items: center;
    cursor: pointer;
    outline: none;
}

.tts-timeline-track {
    width: 100%;
    height: 4px;
    background: var(--tts-progress-bg);
    border-radius: 2px;
    position: relative;
    overflow: hidden;
}

.tts-timeline-progress {
    height: 100%;
    width: 0%;
    background: var(--tts-progress-fill);
    border-radius: 2px;
    transition: width 0.05s linear;
}

.tts-timeline:focus-visible .tts-timeline-track {
    box-shadow: 0 0 0 2px #2563eb;
}

/* Nhóm nút điều khiển bên phải: Giọng & Tốc độ */
.tts-controls-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Drop list chọn giọng đọc (Tiết kiệm diện tích, linh hoạt với nhiều giọng) */
.tts-voice-select-wrap {
    display: inline-flex;
    align-items: center;
    position: relative;
}

.tts-voice-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-color: var(--tts-control-bg);
    border: 1px solid var(--tts-control-border);
    border-radius: 4px;
    padding: 2px 22px 2px 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--tts-text-main);
    cursor: pointer;
    line-height: 1.4;
    height: 26px;
    outline: none;
    transition: all 0.15s ease;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%2364748b' d='M0 0l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    background-size: 8px 5px;
    font-family: inherit;
}

.tts-voice-select:hover {
    border-color: #94a3b8;
    background-color: #fff;
}

.tts-voice-select:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

/* Switch chuyển đổi giọng (Segmented Control phong cách Swagger/Developer UI) */
.tts-voice-toggle {
    display: inline-flex;
    background: var(--tts-control-bg);
    border: 1px solid var(--tts-control-border);
    border-radius: 4px;
    padding: 2px;
    gap: 2px;
}

.tts-voice-pill {
    background: transparent;
    border: none;
    padding: 4px 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--tts-text-sub);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.12s ease;
    line-height: 1;
}

.tts-voice-pill:hover {
    color: var(--tts-text-main);
}

.tts-voice-pill.active {
    background: var(--tts-active-bg);
    color: var(--tts-text-main);
    font-weight: 600;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.tts-voice-single {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--tts-text-sub);
    background: var(--tts-control-bg);
    border: 1px solid var(--tts-control-border);
    border-radius: 4px;
    line-height: 1;
}

/* Nút chọn tốc độ */
.tts-speed-btn {
    min-width: 38px;
    height: 28px;
    background: var(--tts-bg);
    border: 1px solid var(--tts-control-border);
    border-radius: 4px;
    color: var(--tts-text-main);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
    transition: background-color 0.12s ease, border-color 0.12s ease;
}

.tts-speed-btn:hover {
    background: var(--tts-control-bg);
    border-color: #cbd5e1;
}

/* Responsive trên điện thoại di động (Mobile Web) */
@media (max-width: 640px) {
    .tts-player-card {
        flex-wrap: wrap;
        padding: 10px 12px;
        gap: 10px;
    }

    .tts-track-container {
        order: 2;
        width: 100%;
        min-width: 100%;
        margin-top: 2px;
    }

    .tts-play-btn {
        order: 1;
        width: 38px;
        height: 38px;
    }

    .tts-controls-group {
        order: 1;
        margin-left: auto;
    }

    .tts-voice-pill {
        padding: 5px 8px;
    }
}