/* PDF盖章系统 - 主要样式文件 */

/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f6fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header h1 {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 300;
}

.nav {
    margin-top: 1rem;
    text-align: center;
}

.nav a {
    color: white;
    text-decoration: none;
    margin: 0 1rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: background-color 0.3s;
}

.nav a:hover, .nav a.active {
    background-color: rgba(255,255,255,0.2);
}

/* 主内容区域 */
.main-content {
    margin-top: 2rem;
    margin-bottom: 2rem;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 2rem;
    margin-bottom: 2rem;
}

.card-title {
    font-size: 1.2rem;
    color: #2d3748;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

/* 文件上传区域 */
.upload-section {
    border: 2px dashed #e2e8f0;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    margin-bottom: 1.5rem;
}

.upload-section:hover {
    border-color: #667eea;
    background-color: #f8faff;
}

.upload-section.dragover {
    border-color: #667eea;
    background-color: #f0f4ff;
}

.upload-icon {
    font-size: 3rem;
    color: #a0aec0;
    margin-bottom: 1rem;
}

.upload-text {
    color: #4a5568;
    margin-bottom: 0.5rem;
}

.upload-hint {
    color: #a0aec0;
    font-size: 0.9rem;
}

/* 文件信息显示 */
.file-info {
    background: #f7fafc;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    padding: 1rem;
    margin-top: 1rem;
    display: none;
}

.file-info.show {
    display: block;
}

.file-name {
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.file-size {
    color: #718096;
    font-size: 0.9rem;
}

/* 表单元素 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #374151;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-select {
    appearance: none;
    background-image: url('data:image/svg+xml;charset=US-ASCII,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 4 5"><path fill="%23666" d="M2 0L0 2h4zm0 5L0 3h4z"/></svg>');
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 8px 10px;
    padding-right: 2.5rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    line-height: 1.5;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.btn-warning {
    background: #ffc107;
    color: #212529;
}

.btn-warning:hover {
    background: #e0a800;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* 网格布局 */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -0.75rem;
}

.col {
    flex: 1;
    padding: 0 0.75rem;
}

.col-6 {
    flex: 0 0 50%;
    max-width: 50%;
    padding: 0 0.75rem;
}

.col-4 {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
    padding: 0 0.75rem;
}

.col-3 {
    flex: 0 0 25%;
    max-width: 25%;
    padding: 0 0.75rem;
}

/* 配置面板 */
.config-panel {
    background: #f8f9ff;
    border-left: 4px solid #667eea;
    padding: 1.5rem;
    border-radius: 0 8px 8px 0;
    margin-bottom: 2rem;
}

.config-group {
    margin-bottom: 2rem;
}

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

.config-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e2e8f0;
}

/* 单选按钮组 */
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.radio-item {
    display: flex;
    align-items: center;
    position: relative;
}

.radio-item input[type="radio"] {
    margin-right: 0.5rem;
    transform: scale(1.2);
}

.radio-item label {
    cursor: pointer;
    user-select: none;
}

/* 复选框组 */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
}

.checkbox-item input[type="checkbox"] {
    margin-right: 0.5rem;
    transform: scale(1.2);
}

.checkbox-item label {
    cursor: pointer;
    user-select: none;
}

/* 滑块 */
.range-group {
    margin-bottom: 1rem;
}

.range-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.range-value {
    font-weight: 600;
    color: #667eea;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #e2e8f0;
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

/* 进度条 */
.progress {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 4px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, .2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, .2) 50%,
        rgba(255, 255, 255, .2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 1rem 1rem;
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    0% {
        background-position: 1rem 0;
    }
    100% {
        background-position: 0 0;
    }
}

/* 状态消息 */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-danger {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-warning {
    color: #856404;
    background-color: #fff3cd;
    border-color: #ffeaa7;
}

.alert-info {
    color: #0c5460;
    background-color: #d1ecf1;
    border-color: #bee5eb;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #6c757d;
}

.modal-close:hover {
    color: #000;
}

/* 二维码样式 */
.qr-code {
    text-align: center;
    padding: 2rem;
}

.qr-code img {
    max-width: 200px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .col-6, .col-4, .col-3 {
        flex: 0 0 100%;
        max-width: 100%;
        margin-bottom: 1rem;
    }
    
    .radio-group, .checkbox-group {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .nav a {
        display: block;
        margin: 0.25rem 0;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 隐藏元素 */
.hidden {
    display: none !important;
}

/* 文本对齐 */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* 边距 */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }