/* TXT阅读页面样式 */
.txt-nav-wrapper {
    position: sticky;
    top: 0;
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.txt-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.txt-nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.back-to-detail {
    color: #6b7280;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

.back-to-detail:hover {
    color: #374151;
}

.book-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: #111827;
}

/* 统一导航栏元素样式 */
.nav-text {
    font-size: 0.875rem;
    color: #6b7280;
}

.txt-nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.zoom-controls,
.line-height-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: #f3f4f6;
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
}

.zoom-btn {
    width: 2rem;
    height: 2rem;
    border: 1px solid #d1d5db;
    background: #fff;
    border-radius: 0.25rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.zoom-btn:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

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

.zoom-text {
    font-size: 0.875rem;
    color: #6b7280;
    min-width: 4rem;
    text-align: center;
}

.total-lines {
    font-size: 0.875rem;
    color: #6b7280;
}

#txt-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
    min-height: 70vh;
}

.txt-line {
    margin: 0.5rem 0;
    line-height: 1.7;
    color: #374151;
    word-break: break-word;
    white-space: pre-wrap;
}

.loading-tip {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    text-align: center;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.loading-spinner {
    width: 2.5rem;
    height: 2.5rem;
    border: 3px solid #f3f4f6;
    border-top: 3px solid #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-progress {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: #6b7280;
}

.loading-error {
    margin: 1rem 0;
    font-size: 1rem;
    color: #ef4444;
    font-weight: 500;
}

.load-more-tip {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.load-more-tip.show {
    opacity: 1;
    visibility: visible;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .txt-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .txt-nav-left {
        gap: 0.5rem;
        width: 100%;
        flex-wrap: wrap;
    }
    
    .book-name {
        font-size: 0.9rem;
    }
    
    .txt-nav-right {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 0.5rem 1rem;
    }
    
    .theme-controls {
        display: flex;
        gap: 0.8rem;
        flex-wrap: nowrap;
        margin-left: auto;
    }
    
    .control-item {
        display: flex;
        align-items: center;
        gap: 0.25rem;
    }
    
    .control-text {
        font-size: 0.75rem;
    }
    
    .zoom-controls,
    .line-height-controls {
        gap: 0.3rem;
        padding: 0.2rem 0.4rem;
    }
    
    .zoom-btn {
        width: 1.5rem;
        height: 1.5rem;
        font-size: 0.8rem;
    }
    
    .zoom-text,
    .line-height-text {
        font-size: 0.875rem;
        min-width: 3rem;
    }
    
    .nav-text {
        font-size: 0.875rem;
    }
    
    #txt-container {
        max-width: 100%;
        padding: 0 1rem;
    }
}

/* 小屏幕设备适配 */
@media (max-width: 480px) {
    .txt-nav {
        gap: 0.2rem;
    }
    
    .txt-nav-right {
        gap: 0.2rem;
    }
    
    .theme-controls {
        gap: 0.3rem;
    }
    
    .control-item {
        gap: 0.1rem;
    }
    
    .control-text {
        font-size: 0.6rem;
    }
    
    .zoom-controls,
    .line-height-controls {
        gap: 0.2rem;
        padding: 0.15rem 0.25rem;
    }
    
    .zoom-btn {
        width: 1.3rem;
        height: 1.3rem;
        font-size: 0.7rem;
    }
    
    .zoom-text,
    .line-height-text {
        font-size: 0.6rem;
        min-width: 2.5rem;
    }
    
    .total-lines,
    .read-progress {
        font-size: 0.6rem;
        margin-right: 0.3rem;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .txt-nav-wrapper {
        background: #1f2937;
        border-bottom-color: #374151;
    }
    
    .back-to-detail {
        color: #d1d5db;
    }
    
    .back-to-detail:hover {
        color: #f3f4f6;
    }
    
    .book-name {
        color: #f9fafb;
    }
    
    .control-text,
    .read-progress {
        color: #d1d5db;
    }
    
    .zoom-controls,
    .line-height-controls {
        background: #374151;
    }
    
    .zoom-btn {
        background: #1f2937;
        border-color: #4b5563;
        color: #f3f4f6;
    }
    
    .zoom-btn:hover {
        background: #374151;
        border-color: #6b7280;
    }
    
    .zoom-text,
    .total-lines {
        color: #d1d5db;
    }
    
    .loading-tip {
        background: #1f2937;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    }
    
    .loading-spinner {
        border-color: #374151;
        border-top-color: #3b82f6;
    }
    
    .loading-progress {
        color: #d1d5db;
    }
    
    .txt-line {
        color: #e5e7eb;
    }
}