/* 基础布局 */
.tool-main {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

/* 预览区域 */
.preview-area {
    position: relative;
    margin-top: 20px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    display: none;  /* 初始状态下隐藏 */
    flex-direction: column;
}

#previewCanvas {
    max-width: 100%;
    height: auto !important;
    object-fit: contain;
}

/* 设置面板 */
.settings-panel {
    background: var(--bg-color-50);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color-10);
    position: sticky;
    top: 24px;
}

.settings-panel h3 {
    margin: 0 0 20px 0;
    color: var(--text-color);
    font-size: 18px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 4px;
}

/* 按钮组统一样式 */
.btn-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.btn-group-option {
    padding: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-color);
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: -8px;
}

.btn-group-option:hover {
    border-color: var(--primary-color);
    background: var(--primary-color-10);
}

.btn-group-option.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 设置项统一样式 */
.settings-group {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.setting-row {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

.setting-row:last-child {
    border-bottom: none;
}

.setting-row label {
    width: 80px;
    color: var(--text-color);
    font-size: 14px;
    margin: 0;
}

.setting-row .setting-control {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 输入控件统一样式 */
.input-wrapper {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0 12px;
}

.input-wrapper input[type="text"] {
    width: 100%;
    height: 40px;
    border: none;
    background: none;
    color: var(--text-color);
    font-size: 14px;
}

.input-wrapper input[type="text"]:focus {
    outline: none;
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
}

/* 滑块统一样式 */
input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    margin: 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 颜色选择器统一样式 */
input[type="color"] {
    width: 32px;
    height: 32px;
    padding: 2px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
}

/* 值显示统一样式 */
.value-display {
    min-width: 48px;
    text-align: right;
    color: var(--text-color);
    font-size: 14px;
}

/* 位置选择网格 */
.position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 8px;
}

.position-option {
    padding: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
    color: var(--text-color);
}

.position-option:hover {
    border-color: var(--primary-color);
    background: var(--primary-color-10);
}

.position-option.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 水印图片上传区域 */
.watermark-upload {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.watermark-upload:hover {
    border-color: var(--primary-color);
    background: var(--primary-color-10);
}

.watermark-upload .upload-content,
.watermark-upload .preview-content {
    width: 100%;
}

.watermark-upload p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.watermark-upload small {
    display: block;
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 12px;
}

.preview-content img {
    max-width: 100%;
    max-height: 120px;
    margin-bottom: 8px;
    border-radius: 4px;
}

/* 角度预设 */
.angle-presets {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.angle-option {
    padding: 6px 8px;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
    color: var(--text-color);
}

.angle-option:hover {
    border-color: var(--primary-color);
    background: var(--primary-color-10);
}

.angle-option.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 水印模式组间距 */
.watermark-mode-group {
    margin-top: 24px;
}

/* 响应式布局 */
@media (max-width: 768px) {
    .tool-main {
        grid-template-columns: 1fr;
    }

    .settings-panel {
        position: static;
    }
}

/* 动画效果 */
#tileSettings {
    transition: all 0.3s ease;
}

#tileSettings.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* 滑块和数值显示的包装器 */
.range-with-value {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}

.range-with-value input[type="range"] {
    flex: 1;
    margin: 0;
}

.range-with-value .value-display {
    min-width: 45px;
    text-align: right;
}

/* 导出格式按钮组 */
.btn-group.format-group {
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

/* 页面导航样式 */
.page-navigation {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 20px;
    display: flex;
    justify-content: center;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    width: auto;
    min-width: 300px;
    justify-content: center;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s;
}

.nav-btn:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
}

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

.nav-btn svg {
    fill: currentColor;
}

#pageInfo {
    color: var(--text-color);
    font-size: 14px;
    min-width: 120px;
    text-align: center;
}

/* 页面范围输入框提示文本 */
.input-wrapper small {
    display: block;
    margin-top: 4px;
    color: var(--text-secondary);
    font-size: 12px;
}

/* PDF加载提示 */
.loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-secondary);
}

.loading-indicator svg {
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 画布容器 */
.canvas-container {
    position: relative;
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    min-height: 200px;
    overflow: auto;
}

/* 页面范围设置样式 */
.range-options {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.range-option {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
}

/* 偶数页和奇数页选项一行显示 */
.even-odd-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.even-odd-options .range-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
}

/* 输入框和提示文本样式 */
.range-option .input-wrapper {
    margin-top: 8px;
}

/* 间隔选择样式 */
.interval-settings {
    margin-top: 8px;
    margin-left: 20px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
}

/* 模块间距 */
.watermark-settings-group {
    margin-bottom: 32px; /* 增加水印设置模块的底部间距 */
}

.page-range-group {
    margin-top: 32px; /* 增加页面范围模块的顶部间距 */
}

/* 页面范围选项样式优化 */
.range-option {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
}

/* 选项标题和单选框布局 */
.range-option-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.range-option-header input[type="radio"] {
    margin: 0;
}

.range-option-header label {
    margin: 0;
    font-weight: normal;
    cursor: pointer;
}

/* 输入框容器样式 */
.range-option .input-wrapper {
    margin-top: 8px;
    margin-left: 20px; /* 与单选框对齐的缩进 */
}

/* 间隔选择设置样式 */
.interval-settings {
    margin-top: 8px;
    margin-left: 20px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
}

/* 间隔选择说明文本 */
.interval-desc {
    display: block;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.5;
}

/* 间隔选择输入框样式 */
.interval-settings .setting-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.interval-settings .setting-row:last-child {
    margin-bottom: 0;
}

.interval-settings .setting-row label {
    width: 60px;
    flex-shrink: 0;
}

.interval-settings .input-wrapper {
    width: 100px;
    flex-shrink: 0;
    margin: 0; /* 移除之前的 margin */
}

.interval-settings .input-wrapper input {
    width: 100%;
    height: 32px;
    border: none;
    background: none;
    color: var(--text-color);
    font-size: 14px;
    padding: 0 8px;
    text-align: center;
}

/* 修复按钮组高度问题 */
.btn-group {
    height: auto; /* 修正拼写错误 'autp' -> 'auto' */
}

.preview-tip {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 8px 12px;
    background: var(--bg-color-50);
    border-radius: 6px;
    white-space: nowrap;
    overflow: auto;
    margin-top: 20px;
}

/* 添加分隔点的样式 */
.preview-tip .dot {
    margin: 0 8px;
    color: var(--border-color);
}