/* 与 landing page 一致的深色主题 */
:root {
    --bg-page: #1A1A1D;
    --bg-card: #2B2B2E;
    --text-primary: #FFFFFF;
    --text-secondary: #9CA3AF;
    --accent: #3B82F6;
    --accent-hover: #2563EB;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "PingFang SC", "Noto Sans SC", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg-page);
    min-height: 100vh;
    padding: 24px;
    color: var(--text-primary);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
}

header {
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 28px 30px;
    text-align: center;
    border-bottom: 1px solid var(--border-subtle);
}

header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0;
    color: var(--text-primary);
}

header h1 .brand-oio {
    color: var(--accent);
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

main {
    padding: 28px 30px;
}

section {
    margin-bottom: 28px;
}

/* 区块分隔：线 + 间距 */
.input-section {
    margin-bottom: 32px;
}
.file-list-section {
    border-top: 1px solid var(--border-subtle);
    padding-top: 24px;
    margin-top: 32px;
    margin-bottom: 28px;
}
.player-section {
    border-top: 1px solid var(--border-subtle);
    padding-top: 24px;
    margin-top: 32px;
}

h2 {
    color: var(--text-primary);
    margin-bottom: 12px;
    font-size: 1.25rem;
    font-weight: 600;
}

h3 {
    color: var(--text-secondary);
    margin-bottom: 10px;
    font-size: 1.1rem;
    font-weight: 500;
}

/* 输入区域 */
.input-section textarea {
    width: 100%;
    padding: 16px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    resize: vertical;
    transition: border-color 0.2s;
}

.input-section textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.input-section textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* 选择模型（左）+ 选择音色（右） */
.input-options-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-top: 14px;
    flex-wrap: wrap;
}

.model-select-wrapper,
.voice-select-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.model-select {
    min-width: 160px;
    max-width: 200px;
}

.voice-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.voice-select {
    flex: 1;
    max-width: 280px;
    padding: 10px 32px 10px 14px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.voice-select:hover,
.voice-select:focus {
    outline: none;
    border-color: var(--accent);
}

.voice-select optgroup {
    font-weight: 600;
    color: var(--text-secondary);
    padding: 6px 0 4px;
}

.voice-select option {
    padding: 6px 10px;
    color: var(--text-primary);
}

.btn-demo-voice {
    padding: 8px 14px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
    white-space: nowrap;
}
.btn-demo-voice:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.btn-demo-voice:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.openai-key-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 12px;
    margin-top: 12px;
}
.openai-key-row.hidden {
    display: none;
}
.openai-key-input {
    flex: 1;
    min-width: 200px;
    max-width: 360px;
    padding: 8px 12px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-primary);
    font-family: inherit;
}
.openai-key-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}
.openai-key-input:focus {
    outline: none;
    border-color: var(--accent);
}
.openai-key-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.button-group {
    display: flex;
    gap: 12px;
    margin-top: 14px;
}

.option-row {
    display: flex;
    align-items: center;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent);
    color: white;
    flex: 1;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(1px);
}

.btn-secondary {
    background: var(--bg-page);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    padding: 10px 14px;
    font-size: 1rem;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-primary);
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.08);
}

.btn-icon.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* 我的音频 */
.file-list-section {
    margin-bottom: 28px;
}

.file-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
}

.file-list-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.file-view-select {
    min-width: 120px;
    padding: 8px 32px 8px 12px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.file-view-select:hover,
.file-view-select:focus {
    outline: none;
    border-color: var(--accent);
}

.file-view-btn {
    padding: 8px 14px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.file-view-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent);
}

.file-view-btn.active {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--accent);
    color: var(--accent);
}

.file-jump-btn { }

.file-jump-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 85;
}
.file-jump-modal[hidden] { display: none; }
.file-jump-modal-inner {
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    padding: 20px;
    min-width: 280px;
}
.file-jump-modal-title { margin-bottom: 12px; font-size: 1rem; color: var(--text-primary); }
.file-jump-date-wrap {
    display: flex;
    align-items: stretch;
    gap: 10px;
    margin-bottom: 16px;
}
.file-jump-date-picker {
    flex: 1;
    min-width: 0;
    padding: 10px 12px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
}
.file-jump-calendar-btn {
    flex-shrink: 0;
    padding: 10px 14px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s, transform 0.1s;
}
.file-jump-calendar-btn:hover {
    background: #2563eb;
    transform: scale(1.02);
}
.file-jump-calendar-btn:active { transform: scale(0.98); }
.file-jump-modal-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* 日历视图 - 本周：星期在最上方，日期在格子右上角，当日用蓝圈 */
.file-week-view {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-template-rows: auto 1fr;
    gap: 0 8px;
    margin-bottom: 16px;
}
.file-week-view .weekday-header {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid var(--border-subtle);
}
.file-day-cell {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 8px 6px;
    padding-top: 28px;
    position: relative;
    cursor: default;
    transition: all 0.2s;
    min-height: 72px;
}
.file-day-cell:hover { border-color: var(--accent); background: rgba(59,130,246,0.06); }
.file-day-cell .day-num {
    position: absolute;
    top: 6px;
    right: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}
.file-day-cell.today .day-num {
    background: var(--accent);
    color: white;
}
.file-day-cell .day-entries { width: 100%; text-align: left; font-size: 0.7rem; color: var(--text-primary); max-height: 120px; overflow-y: auto; }
.file-day-cell .day-entry { padding: 2px 4px; cursor: pointer; border-radius: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-day-cell .day-entry:hover { background: rgba(59,130,246,0.2); }

.file-month-select-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.file-year-select {
    padding: 8px 12px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
}
.file-year-select.current {
    border: 2px solid var(--accent);
    background: rgba(59,130,246,0.1);
    color: var(--accent);
}

.file-month-btns, .file-year-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}
.file-month-btns button, .file-year-btns button {
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
}
.file-month-btns button:hover, .file-year-btns button:hover {
    border-color: var(--accent);
    background: rgba(59,130,246,0.1);
}
.file-month-btns button.current {
    border: 1px solid var(--border-subtle);
    background: transparent;
    color: var(--text-primary);
}
.file-month-btns button.current .month-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 10px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}
.file-year-btns button.current {
    border: 2px solid var(--accent);
    background: rgba(59,130,246,0.15);
    color: var(--accent);
}

.file-calendar-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 0.95rem;
    color: var(--text-primary);
}
.file-calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 16px;
}
.file-calendar-grid .weekday {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 6px 0;
}
.file-calendar-grid .day-cell {
    min-height: 72px;
    position: relative;
    padding: 6px;
    padding-top: 26px;
    background: var(--bg-card);
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}
.file-calendar-grid .day-cell .day-num {
    position: absolute;
    top: 4px;
    right: 4px;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}
.file-calendar-grid .day-cell.today .day-num {
    background: var(--accent);
    color: white;
}
.file-calendar-grid .day-cell .day-entries { font-size: 0.68rem; color: var(--text-primary); width: 100%; max-height: 80px; overflow-y: auto; margin-top: 2px; }
.file-calendar-grid .day-cell .day-entry { padding: 1px 4px; cursor: pointer; border-radius: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-calendar-grid .day-cell .day-entry:hover { background: rgba(59,130,246,0.2); }
.file-calendar-grid .day-cell:hover { border-color: var(--accent); background: rgba(59,130,246,0.06); }
.file-calendar-grid .day-cell.has-files { color: var(--accent); }
.file-calendar-grid .day-cell.today { border: 1px solid var(--border-subtle); background: rgba(59,130,246,0.08); }
.file-calendar-grid .day-cell.other-month { color: var(--text-secondary); opacity: 0.6; }
.file-calendar-grid .day-cell.empty { cursor: default; opacity: 0.3; padding-top: 6px; }

.file-day-files-title {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.file-day-files-sub {
    font-size: 0.85rem;
    color: var(--text-primary);
    opacity: 0.9;
    margin-bottom: 12px;
}
.file-day-files-list { margin-top: 8px; }

.file-list-container {
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 12px;
    min-height: 80px;
}

.file-list-empty {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
    padding: 24px;
    margin: 0;
}

.file-list-empty.hidden {
    display: none;
}

.file-list-content {
    display: block;
}

.file-day-cell.selected {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.15);
}

.file-calendar-grid .day-cell.selected {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.2);
}

.file-month-group {
    margin-bottom: 8px;
}

.file-month-header {
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-month-header::before {
    content: '▶';
    font-size: 0.7rem;
    transition: transform 0.2s;
}

.file-month-group.collapsed .file-month-header::before {
    transform: rotate(0deg);
}

.file-month-group:not(.collapsed) .file-month-header::before {
    transform: rotate(90deg);
}

.file-month-items {
    padding-left: 12px;
    margin-top: 6px;
}

.file-month-group.collapsed .file-month-items {
    display: none;
}

.file-item-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    margin-bottom: 4px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.file-item-row:hover {
    background: rgba(255, 255, 255, 0.06);
}

.file-item-row.current {
    border-left: 3px solid var(--accent);
    background: rgba(59, 130, 246, 0.12);
}

.file-item-name {
    flex: 1;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.file-item-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-item-actions button {
    padding: 6px 12px;
    font-size: 0.85rem;
    border-radius: 6px;
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: background 0.2s;
}

.file-item-download {
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent);
    border: 1px solid var(--accent);
}

.file-item-download:hover {
    background: rgba(59, 130, 246, 0.3);
}

.file-item-delete {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.4);
}

.file-item-delete:hover {
    background: rgba(239, 68, 68, 0.25);
}

.current-playing-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: -8px 0 12px 0;
    min-height: 1.4em;
}

/* 删除确认弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 20px;
}

.modal-overlay[hidden] {
    display: none;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 400px;
    width: 100%;
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.modal-message {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.modal-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.btn-danger {
    background: rgba(239, 68, 68, 0.9);
    color: white;
    border: none;
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 1);
}

/* 播放器区域（图3 样式） */
.audio-player {
    background: var(--bg-page);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    border: 1px solid var(--border-subtle);
}

.audio-player audio {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
    pointer-events: none;
}

.player-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* 圆形播放按钮 - UI 蓝 */
.btn-play-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--accent);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s;
}

.btn-play-circle:hover {
    background: var(--accent-hover);
}

.btn-play-circle .play-icon,
.btn-play-circle .pause-icon {
    font-size: 1.1rem;
    line-height: 1;
}

/* 进度条 */
.progress-wrap {
    flex: 1;
    min-width: 80px;
}

.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
    cursor: pointer;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.1s linear;
}

/* 两行控制：每列「标签+控件」，列间统一间距 */
.player-controls-block {
    display: flex;
    flex-wrap: nowrap;
    align-items: flex-end;
    gap: 10px;
    margin-left: auto;
}

.player-control-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.player-control-col .control-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: center;
}

.player-control-col-no-label .control-label-empty {
    visibility: hidden;
    height: 1em;
}

.player-control-col .dropdown-wrap {
    position: relative;
}

.player-control-col .btn-dropdown {
    padding: 5px 10px;
    min-width: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.78rem;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    white-space: nowrap;
    text-align: center;
}

.player-control-col .btn-dropdown.active {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--accent);
    color: var(--accent);
}

.player-control-col .btn-dropdown:hover {
    background: rgba(59, 130, 246, 0.12);
}

.player-control-col .dropdown-mode .btn-dropdown {
    min-width: 4.2em;
}

.player-control-col .dropdown-speed .btn-dropdown {
    min-width: 3.5em;
}

/* 单句循环：开关样式 */
.toggle-switch {
    display: inline-flex;
    align-items: center;
    width: 44px;
    height: 24px;
    padding: 0;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 999px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    position: relative;
}
.toggle-switch:hover {
    border-color: var(--accent);
}
.toggle-switch.active {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--accent);
}
.toggle-switch-knob {
    position: absolute;
    left: 3px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: var(--text-primary);
    border-radius: 50%;
    transition: transform 0.2s, left 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.toggle-switch.active .toggle-switch-knob {
    left: calc(100% - 21px);
    background: var(--accent);
}

.player-control-col .sentence-nav {
    display: flex;
    gap: 6px;
}

.player-control-col .btn-icon {
    padding: 5px 10px;
    font-size: 0.9rem;
    border-radius: 6px;
}

.player-control-col .btn-sentence-nav {
    padding: 5px 8px;
    font-size: 0.78rem;
    white-space: nowrap;
}

/* 倍速 / 显示模式 - 蓝色边框（下拉等通用） */
.dropdown-wrap {
    position: relative;
}

.btn-dropdown {
    padding: 8px 14px;
    min-width: 52px;
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    white-space: nowrap;
}

.dropdown-mode .btn-dropdown {
    min-width: 5.5em;
}

.btn-dropdown:hover {
    background: rgba(59, 130, 246, 0.12);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 6px;
    min-width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    list-style: none;
    z-index: 50;
    padding: 6px 0;
}

.dropdown-menu li {
    padding: 10px 16px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.9rem;
    white-space: nowrap;
}

.player-controls-block .dropdown-menu li {
    padding: 6px 12px;
    font-size: 0.78rem;
}

.dropdown-menu li:hover,
.dropdown-menu li[aria-selected="true"] {
    background: rgba(59, 130, 246, 0.2);
}

.dropdown-menu li[aria-selected="true"] {
    background: var(--accent);
    color: white;
}

/* 快捷键说明行（字号调小） */
.shortcut-hints-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-right: 4px;
}

.shortcut-hints {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 16px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-subtle);
}

.shortcut-hint-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.shortcut-key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-subtle);
    border-radius: 5px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: inherit;
}

.shortcut-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.shortcut-hint-item .shortcut-key + .shortcut-key {
    margin-left: 2px;
}

.time-display {
    font-variant-numeric: tabular-nums;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 字幕区域（字体调小） */
.subtitles-container {
    background: var(--bg-page);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
}

.subtitles-container h3 {
    font-size: 0.95rem;
}

.subtitles-list {
    max-height: 400px;
    overflow-y: auto;
}

.reading-mode-content {
    padding: 4px 0;
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}
.reading-mode-content p {
    margin: 0 0 1em 0;
}
.reading-mode-content p:last-child {
    margin-bottom: 0;
}

.reading-sentence {
    transition: background 0.2s;
}
.reading-sentence.current {
    background: rgba(59, 130, 246, 0.4);
    border-radius: 3px;
}

.reading-mode-empty {
    color: var(--text-secondary);
    text-align: center;
    padding: 20px 16px;
    font-size: 0.9rem;
}

.subtitle-item {
    padding: 12px 14px;
    margin-bottom: 8px;
    background: var(--bg-card);
    border-radius: 8px;
    border-left: 3px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-subtle);
}

.subtitle-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.subtitle-item.active {
    border-left-color: var(--accent);
    background: rgba(59, 130, 246, 0.12);
}

.subtitle-item.playing {
    border-left-color: var(--accent);
    background: rgba(59, 130, 246, 0.08);
}

.subtitle-text {
    flex: 1;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--text-primary);
}

.subtitle-time {
    color: var(--text-secondary);
    font-size: 0.78rem;
    margin-left: 12px;
    font-variant-numeric: tabular-nums;
}

/* Dictation 模式样式 */
.dictation-item {
    padding: 14px 16px;
    margin-bottom: 10px;
    background: var(--bg-card);
    border-radius: 8px;
    border-left: 3px solid transparent;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-subtle);
}

.dictation-item.active {
    border-left-color: var(--accent);
    background: rgba(59, 130, 246, 0.12);
}

.dictation-item.playing {
    border-left-color: var(--accent);
    background: rgba(59, 130, 246, 0.08);
}

.dictation-input-wrapper {
    flex: 1;
    display: flex;
    gap: 10px;
    align-items: center;
}

.dictation-input {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.dictation-input::placeholder {
    color: var(--text-secondary);
}

.dictation-input:focus {
    outline: none;
    border-color: var(--accent);
}

.dictation-submit-btn {
    padding: 10px 20px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    white-space: nowrap;
}

.dictation-submit-btn:hover {
    background: var(--accent-hover);
}

.dictation-input-display {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.user-input {
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.95rem;
}

.user-input.correct {
    background: rgba(34, 197, 94, 0.2);
    color: #86efac;
    border: 1px solid rgba(34, 197, 94, 0.4);
}

.user-input.incorrect {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.4);
}

.correct-answer {
    padding: 8px 12px;
    background: rgba(59, 130, 246, 0.15);
    color: #93c5fd;
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 6px;
    font-size: 0.95rem;
}

/* 状态提示弹窗（蓝框，居中） */
.status-toast {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 90;
    padding: 16px 24px;
    min-width: 260px;
    max-width: 90vw;
    background: var(--bg-card);
    border: 2px solid var(--accent);
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.status-toast[hidden] {
    display: none !important;
}

.status-toast-message {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-primary);
    text-align: center;
}

/* 响应式 */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.6rem;
    }

    main {
        padding: 20px;
    }

    .button-group {
        flex-direction: column;
    }

    .player-controls {
        justify-content: center;
    }

    .time-display {
        margin-left: 0;
        width: 100%;
        text-align: center;
    }
}

/* 滚动条 */
.subtitles-list::-webkit-scrollbar {
    width: 8px;
}

.subtitles-list::-webkit-scrollbar-track {
    background: var(--bg-page);
    border-radius: 8px;
}

.subtitles-list::-webkit-scrollbar-thumb {
    background: var(--bg-card);
    border-radius: 8px;
}

.subtitles-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}