/* 预览区域 - 使用 JavaScript 动态计算高度与左侧对齐 */
.preview-area.card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.preview-area .preview-placeholder,
.preview-area .preview-content {
    flex: 1;
    overflow: hidden;
}

.preview-area .preview-content {
    overflow-y: auto;
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    text-align: center;
    padding: 40px;
}

.preview-placeholder .placeholder-icon {
    width: 80px;
    height: 80px;
    background: rgba(0, 113, 227, 0.08);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.preview-placeholder svg {
    width: 40px;
    height: 40px;
    color: var(--primary-light);
}

.preview-placeholder h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.preview-placeholder p {
    font-size: 0.95rem;
}

.preview-content {
    display: none;
    flex-direction: column;
    height: 100%;
}

.preview-content.show {
    display: flex;
    animation: fadeIn 0.4s ease;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.preview-stats {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.preview-stats .stat {
    text-align: center;
    min-width: 70px;
}

.preview-stats .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.preview-stats .stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* 已保存翻译指示器 */
.saved-translations-indicator {
    position: relative;
    display: inline-block;
}

.saved-trans-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border: none;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.1s ease;
}

.saved-trans-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.saved-trans-btn svg {
    width: 20px;
    height: 20px;
}

.saved-trans-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 160px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

.saved-trans-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.saved-trans-item {
    padding: 10px 16px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text);
    transition: background 0.15s ease;
}

.saved-trans-item:first-child {
    border-radius: 10px 10px 0 0;
}

.saved-trans-item:last-child {
    border-radius: 0 0 10px 10px;
}

.saved-trans-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* Markdown 预览 */
.preview-markdown {
    background: rgba(248, 250, 252, 0.8);
    border-radius: 14px;
    padding: 20px;
    height: 100%;
    min-height: 400px;
    overflow-y: auto;
    font-size: 1.15rem;
    line-height: 1.8;
}

/* 中等屏幕预览区域优化 */
@media (min-width: 1200px) {
    .preview-markdown {
        padding: 24px;
        font-size: 1.2rem;
        line-height: 1.85;
    }
}

/* 中大屏幕预览区域优化 */
@media (min-width: 1400px) {
    .preview-markdown {
        padding: 28px;
        line-height: 1.9;
    }
}

/* 大屏幕预览区域优化 */
@media (min-width: 1600px) {
    .preview-markdown {
        padding: 32px 36px;
        font-size: 1.25rem;
    }
}

/* 超大屏幕预览区域优化 */
@media (min-width: 1920px) {
    .preview-markdown {
        padding: 36px 40px;
        font-size: 1.3rem;
        line-height: 1.95;
    }
}

.preview-markdown::-webkit-scrollbar {
    width: 8px;
}

.preview-markdown::-webkit-scrollbar-track {
    background: transparent;
}

.preview-markdown::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.preview-markdown h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
    color: var(--text-primary);
}

@media (min-width: 1200px) {
    .preview-markdown h1 {
        font-size: 1.7rem;
    }
}

@media (min-width: 1600px) {
    .preview-markdown h1 {
        font-size: 1.9rem;
    }
}

@media (min-width: 1920px) {
    .preview-markdown h1 {
        font-size: 2.1rem;
    }
}

.preview-markdown h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 28px 0 16px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (min-width: 1200px) {
    .preview-markdown h2 {
        font-size: 1.35rem;
    }
}

@media (min-width: 1600px) {
    .preview-markdown h2 {
        font-size: 1.5rem;
    }
}

@media (min-width: 1920px) {
    .preview-markdown h2 {
        font-size: 1.6rem;
    }
}

.preview-markdown h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 20px 0 12px;
    color: var(--text-primary);
}

.preview-markdown p {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.preview-markdown strong {
    color: var(--text-primary);
    font-weight: 600;
}

.preview-markdown ul, .preview-markdown ol {
    margin-left: 24px;
    margin-bottom: 16px;
}

.preview-markdown li {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.preview-markdown hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 28px 0;
}

.preview-markdown blockquote {
    background: rgba(0, 113, 227, 0.05);
    border-left: 4px solid var(--primary);
    padding: 16px 20px;
    margin: 16px 0;
    border-radius: 0 12px 12px 0;
}

.preview-markdown blockquote p {
    margin: 0;
}

/* 讲话人样式 - 不同讲话人使用不同颜色 */
.preview-markdown .speaker-block {
    margin: 16px 0;
    padding: 16px 20px;
    border-radius: 12px;
    position: relative;
}

.preview-markdown .speaker-block.speaker-1 {
    background: rgba(0, 113, 227, 0.06);
    border-left: 4px solid var(--primary);
}

.preview-markdown .speaker-block.speaker-2 {
    background: rgba(52, 199, 89, 0.06);
    border-left: 4px solid var(--success);
}

.preview-markdown .speaker-block.speaker-3 {
    background: rgba(255, 159, 10, 0.06);
    border-left: 4px solid var(--warning);
}

.preview-markdown .speaker-block.speaker-4 {
    background: rgba(255, 59, 48, 0.06);
    border-left: 4px solid var(--error);
}

.preview-markdown .speaker-block.speaker-5 {
    background: rgba(175, 82, 222, 0.06);
    border-left: 4px solid #af52de;
}

.preview-markdown .speaker-name {
    font-weight: 600;
    margin-bottom: 8px;
    display: inline-block;
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.preview-markdown .speaker-block.speaker-1 .speaker-name {
    background: rgba(0, 113, 227, 0.1);
    color: var(--primary);
}

.preview-markdown .speaker-block.speaker-2 .speaker-name {
    background: rgba(52, 199, 89, 0.1);
    color: var(--success);
}

.preview-markdown .speaker-block.speaker-3 .speaker-name {
    background: rgba(255, 159, 10, 0.1);
    color: #c77c00;
}

.preview-markdown .speaker-block.speaker-4 .speaker-name {
    background: rgba(255, 59, 48, 0.1);
    color: var(--error);
}

.preview-markdown .speaker-block.speaker-5 .speaker-name {
    background: rgba(175, 82, 222, 0.1);
    color: #af52de;
}

/* 深色模式下讲话人样式 */
[data-theme="dark"] .preview-markdown .speaker-block.speaker-1 {
    background: rgba(41, 151, 255, 0.1);
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-2 {
    background: rgba(48, 209, 88, 0.1);
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-3 {
    background: rgba(255, 214, 10, 0.1);
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-4 {
    background: rgba(255, 69, 58, 0.1);
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-5 {
    background: rgba(191, 90, 242, 0.1);
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-1 .speaker-name {
    background: rgba(0, 113, 227, 0.25);
    color: #a5b4fc;
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-2 .speaker-name {
    background: rgba(16, 185, 129, 0.25);
    color: #6ee7b7;
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-3 .speaker-name {
    background: rgba(245, 158, 11, 0.25);
    color: #fcd34d;
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-4 .speaker-name {
    background: rgba(236, 72, 153, 0.25);
    color: #f9a8d4;
}

[data-theme="dark"] .preview-markdown .speaker-block.speaker-5 .speaker-name {
    background: rgba(0, 113, 227, 0.25);
    color: #c4b5fd;
}

.preview-markdown table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.9rem;
}

.preview-markdown th,
.preview-markdown td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.preview-markdown th {
    background: rgba(0, 113, 227, 0.08);
    font-weight: 600;
    color: var(--text-primary);
}

.preview-markdown tr:hover td {
    background: rgba(0, 113, 227, 0.04);
}

/* 编辑模式样式 */
.edit-mode-toolbar {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--input-bg);
    border-radius: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.edit-mode-toolbar.show {
    display: flex;
}

.edit-mode-toolbar .toolbar-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    margin-right: 8px;
}

.edit-mode-toolbar .toolbar-btn {
    padding: 8px 12px;
    border: none;
    border-radius: 8px;
    background: white;
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.edit-mode-toolbar .toolbar-btn:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-1px);
}

.edit-mode-toolbar .toolbar-btn.active {
    background: var(--primary);
    color: white;
}

.edit-mode-toolbar .toolbar-btn svg {
    width: 16px;
    height: 16px;
}

.edit-mode-toolbar .toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 8px;
}

[data-theme="dark"] .edit-mode-toolbar {
    background: var(--input-bg);
}

[data-theme="dark"] .edit-mode-toolbar .toolbar-btn {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

[data-theme="dark"] .edit-mode-toolbar .toolbar-btn:hover,
[data-theme="dark"] .edit-mode-toolbar .toolbar-btn.active {
    background: var(--primary);
    color: white;
}

/* 编辑按钮样式 */
.btn-edit {
    background: var(--warning);
    color: white;
    border: none;
}

.btn-edit:hover {
    background: #e68f00;
    transform: scale(1.02);
}

.btn-edit.editing {
    background: var(--success);
}

.btn-edit.editing:hover {
    background: #28a745;
}

/* 可编辑标题和正文 */
.preview-markdown.edit-mode h1,
.preview-markdown.edit-mode h2,
.preview-markdown.edit-mode h3,
.preview-markdown.edit-mode p,
.preview-markdown.edit-mode li,
.preview-markdown.edit-mode blockquote {
    cursor: text;
    padding: 6px 10px;
    margin-left: -10px;
    margin-right: -10px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.preview-markdown.edit-mode h1 {
    padding: 8px 12px;
    margin: -8px -12px 16px -12px;
    border-radius: 8px;
}

.preview-markdown.edit-mode h1:hover,
.preview-markdown.edit-mode h2:hover,
.preview-markdown.edit-mode h3:hover,
.preview-markdown.edit-mode p:hover,
.preview-markdown.edit-mode li:hover,
.preview-markdown.edit-mode blockquote:hover {
    background: rgba(0, 113, 227, 0.06);
}

.preview-markdown.edit-mode h1:focus,
.preview-markdown.edit-mode h2:focus,
.preview-markdown.edit-mode h3:focus,
.preview-markdown.edit-mode p:focus,
.preview-markdown.edit-mode li:focus,
.preview-markdown.edit-mode blockquote:focus {
    outline: none;
    background: rgba(0, 113, 227, 0.1);
    box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.3);
}

.preview-markdown.edit-mode .speaker-content p {
    margin-left: 0;
    margin-right: 0;
}

/* 高亮文本样式 */
.highlight-yellow {
    background: linear-gradient(180deg, transparent 60%, #fef08a 60%);
    padding: 0 2px;
}

.highlight-green {
    background: linear-gradient(180deg, transparent 60%, #bbf7d0 60%);
    padding: 0 2px;
}

.highlight-blue {
    background: linear-gradient(180deg, transparent 60%, #bfdbfe 60%);
    padding: 0 2px;
}

.highlight-pink {
    background: linear-gradient(180deg, transparent 60%, #fbcfe8 60%);
    padding: 0 2px;
}

[data-theme="dark"] .highlight-yellow {
    background: linear-gradient(180deg, transparent 60%, rgba(250, 204, 21, 0.4) 60%);
}

[data-theme="dark"] .highlight-green {
    background: linear-gradient(180deg, transparent 60%, rgba(34, 197, 94, 0.4) 60%);
}

[data-theme="dark"] .highlight-blue {
    background: linear-gradient(180deg, transparent 60%, rgba(59, 130, 246, 0.4) 60%);
}

[data-theme="dark"] .highlight-pink {
    background: linear-gradient(180deg, transparent 60%, rgba(236, 72, 153, 0.4) 60%);
}

/* Toast 通知 */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--text-primary);
    color: white;
    padding: 16px 24px;
    border-radius: 12px;
    display: none;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    max-width: 400px;
}

.toast.show {
    display: flex;
    align-items: center;
    gap: 12px;
    animation: toastIn 0.4s ease;
}

.toast.error {
    background: linear-gradient(135deg, var(--error) 0%, #dc2626 100%);
}

.toast.success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

@keyframes toastIn {
    from { transform: translateX(100px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* 响应式 - 手机端 */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    header {
        padding: 40px 16px 32px;
    }

    header h1 {
        font-size: 32px;
    }

    .header-tagline {
        font-size: 32px;
    }

    .header-intro {
        padding: 0;
    }

    .header-intro p {
        font-size: 15px;
    }

    .header-features {
        gap: 8px 12px;
    }

    .header-features span {
        font-size: 13px;
        padding: 6px 12px;
    }

    .logo {
        width: 60px;
        height: 60px;
        border-radius: 16px;
        margin-bottom: 20px;
    }

    .logo svg {
        width: 30px;
        height: 30px;
    }

    .card {
        padding: 20px;
        border-radius: 16px;
    }

    .upload-area {
        padding: 32px 16px;
    }

    .preview-stats {
        gap: 12px;
    }

    .preview-stats .stat {
        min-width: 60px;
    }

    .preview-stats .stat-value {
        font-size: 1.25rem;
    }

    .preview-header {
        flex-direction: column;
        align-items: stretch;
    }

    .preview-header .btn {
        width: 100%;
    }

    .preview-markdown {
        padding: 20px;
    }

    .top-buttons {
        top: 12px;
        right: 12px;
    }

    .settings-btn, .lang-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    .input-mode-tabs {
        flex-direction: column;
    }

    .language-options {
        flex-direction: column;
    }

    /* Sticky navbar 移动端 */
    .sticky-navbar {
        height: 48px;
    }

    .sticky-navbar-content {
        padding: 0 16px;
    }

    .sticky-navbar-logo .logo-icon {
        width: 28px;
        height: 28px;
        border-radius: 6px;
    }

    .sticky-navbar-logo .logo-icon svg {
        width: 28px;
        height: 28px;
    }

    .sticky-navbar-logo .logo-text {
        font-size: 15px;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .container {
        padding: 12px;
    }

    header h1 {
        font-size: 28px;
    }

    .header-tagline {
        font-size: 28px;
    }

    .header-features {
        flex-direction: column;
        gap: 8px;
        align-items: center;
    }

    .header-features span {
        width: 100%;
        max-width: 200px;
        justify-content: center;
    }

    .card {
        padding: 16px;
    }

    .card-title {
        font-size: 1rem;
    }

    .upload-area {
        padding: 24px 12px;
    }

    .upload-icon {
        width: 56px;
        height: 56px;
    }

    .upload-icon svg {
        width: 24px;
        height: 24px;
    }

    .btn {
        padding: 14px 20px;
        font-size: 0.95rem;
    }
}