/* PDF电子签名工具特定样式 */

/* 页面样式覆盖 */
.page-header {
    margin-bottom: 0.5rem !important;
    padding-bottom: 0 !important;
}

.page-title {
    font-size: 1.75rem !important;
    margin-bottom: 0.5rem !important;
}

.page-subtitle {
    font-size: 0.95rem !important;
    margin-bottom: 0 !important;
}

.tool-page {
    padding-top: 0 !important;
}

.tool-card {
    margin-bottom: 0.75rem;
    padding: 1rem 1.25rem !important;
}

/* 签名类型切换 */
.signature-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.tab-btn {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-white);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--primary-color);
}

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

/* 签名画布 */
.signature-canvas-container {
    position: relative;
    margin-bottom: 1rem;
}

.signature-canvas {
    width: 100%;
    height: 200px;
    border: 4px solid #007bff;
    border-radius: var(--radius-lg);
    background-color: #f8fafc;
    background-image: 
        linear-gradient(rgba(0,123,255,0.15) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,123,255,0.15) 1px, transparent 1px);
    background-size: 16px 16px;
    cursor: crosshair;
    display: block;
    position: relative;
    box-shadow: inset 0 0 20px rgba(0,123,255,0.1);
    transition: all 0.3s ease;
}

.signature-canvas:hover {
    border-color: #0056b3;
    box-shadow: inset 0 0 30px rgba(0,123,255,0.15);
}

.signature-canvas::before {
    content: '在此处签名';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(0,123,255,0.3);
    font-size: 1.2rem;
    pointer-events: none;
}

.signature-canvas.has-content::before {
    display: none;
}

.canvas-controls {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

/* 签名设置 */
.signature-settings {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.setting-item {
    flex: 1;
    min-width: 150px;
}

.setting-item label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.setting-item input[type="range"] {
    width: 100%;
}

.setting-item select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    background: var(--bg-white);
}

/* 历史签名列表 */
.signature-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.signature-item {
    position: relative;
    width: 80px;
    height: 60px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s ease;
}

.signature-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(0,123,255,0.2);
}

.signature-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: white;
}

.remove-sig {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 18px;
    height: 18px;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.signature-item:hover .remove-sig {
    opacity: 1;
}

.remove-sig:hover {
    background: #c0392b;
}

/* Logo上传 */
.logo-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-light);
}

.logo-upload-area:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.logo-preview {
    max-width: 150px;
    max-height: 100px;
    margin: 0.5rem auto;
}

/* PDF预览 */
.pdf-preview-container {
    position: relative;
    width: 100%;
    min-height: 400px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-light);
}

.pdf-page {
    position: relative;
    margin: 1rem auto;
    max-width: 100%;
}

.signature-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
}

.placed-signature {
    position: absolute;
    cursor: move;
    border: 2px solid var(--primary-color);
    background: rgba(255,255,255,0.8);
    user-select: none;
}

.placed-signature img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
}

.placed-signature.selected {
    border-color: var(--danger-color);
    box-shadow: 0 0 10px rgba(0,123,255,0.5);
}

.delete-handle {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 20px;
    height: 20px;
    background: #e74c3c;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    z-index: 10;
}

.resize-handle {
    position: absolute;
    bottom: -6px;
    right: -6px;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 2px;
    cursor: se-resize;
}

.rotate-handle {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    font-size: 12px;
}

/* 签名位置控制 */
.position-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.position-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-white);
    cursor: pointer;
    font-size: 0.85rem;
}

.position-btn:hover {
    background: var(--primary-light);
}

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

/* 签名位置网格选择器 */
.position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
    width: 120px;
    margin: 0.5rem 0;
}

.position-grid-item {
    width: 36px;
    height: 36px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-white);
    cursor: pointer;
    transition: all 0.2s;
}

.position-grid-item:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.position-grid-item.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* 签名参数设置 */
.signature-params {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

.param-item {
    flex: 1;
    min-width: 200px;
}

.param-item label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.param-item input[type="range"] {
    width: 100%;
}

.param-value {
    font-size: 0.85rem;
    color: var(--primary-color);
    margin-left: 0.5rem;
}

/* 已放置签名的样式增强 */
.placed-signature {
    position: absolute;
    cursor: move;
    border: 2px solid var(--primary-color);
    background: rgba(255,255,255,0.8);
    user-select: none;
}

.placed-signature img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .tool-card {
        padding: 0.75rem 1rem !important;
    }
    
    .signature-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: none;
        min-width: 80px;
    }
    
    .signature-settings {
        flex-direction: column;
    }
    
    .setting-item {
        min-width: 100%;
    }
}