/* 通用样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 头部样式 */
header {
    background-color: #343a40;
    color: white;
    padding: 10px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo img {
    height: 40px;
}

nav a {
    color: white;
    text-decoration: none;
    margin-left: 15px;
    font-size: 14px;
}

/* 表单样式 */
.form-container {
    max-width: 100%;
    width: 100%;
    margin: 15px auto;
    padding: 15px;
    background: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

@media (min-width: 768px) {
    .form-container {
        max-width: 500px;
    }
}

.form-container h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #343a40;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    font-size: 14px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 10px;
}

.submit-btn:hover {
    background-color: #0069d9;
}

.form-links {
    margin-top: 15px;
    text-align: center;
}

.form-links a {
    color: #007bff;
    text-decoration: none;
    font-size: 14px;
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
    text-align: center;
}

/* 底部样式 */
footer {
    background-color: #343a40;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 30px;
}

footer * {
    text-align: center;
}

footer nav {
    margin-bottom: 10px;
}

footer nav a {
    color: white;
    text-decoration: none;
    margin: 0 10px;
    font-size: 14px;
}

/* 文件上传按钮 */
.file-upload-btn {
    display: inline-block;
    padding: 10px 15px;
    background-color: #6c757d;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    text-align: center;
}

.file-upload-btn input[type="file"] {
    display: none;
}

.dashboard {
    padding: 2rem;
}

.issues-table {
    width: 100%;
    font-size: 14px;
}

.issues-table th, .issues-table td {
    padding: 8px;
    word-break: break-word;
}

.issues-table tr:nth-child(even) {
    background-color: #f2f2f2;
}

/* 图片优化 */
.issue-image {
    max-width: 100%;
    height: auto;
    margin-top: 10px;
}

/* 响应式布局 */
@media (max-width: 480px) {
    header {
        padding: 10px;
    }
    
    .logo img {
        height: 30px;
    }
    
    .dashboard {
        padding: 10px;
    }
    
    .stats {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .stats div {
        padding: 10px;
        background: #f5f5f5;
        border-radius: 4px;
        text-align: center;
    }
    
    .issues-table {
        font-size: 12px;
    }
    
    .issues-table th, .issues-table td {
        padding: 5px;
    }
}

.success-message {
    background-color: #d4edda;
    color: #155724;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
    text-align: center;
}

.error-container {
    text-align: center;
    padding: 50px 20px;
    max-width: 600px;
    margin: 0 auto;
}

.error-container h1 {
    font-size: 72px;
    margin: 0;
    color: #e74c3c;
}

.error-container h2 {
    margin: 10px 0 20px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    margin-top: 20px;
}

button, .submit-btn, .file-upload-btn {
    min-width: 44px;
    min-height: 44px;
    padding: 12px;
    font-size: 16px;
}