* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 0;
}

.card, .status-card, .info-card {
    background: white;
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
    font-size: 1rem;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.file-input-wrapper {
    position: relative;
    margin-bottom: 10px;
}

.form-group input[type="file"] {
    width: 100%;
    padding: 15px;
    border: 2px dashed #e1e5e9;
    border-radius: 10px;
    background-color: #f8f9fa;
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-group input[type="file"]:hover {
    border-color: #667eea;
    background-color: #f0f2ff;
}

.file-preview {
    margin-top: 15px;
    text-align: center;
}

.file-preview img {
    max-width: 200px;
    max-height: 200px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.file-info {
    background: #f8f9fa;
    padding: 10px;
    border-radius: 8px;
    margin-top: 10px;
    font-size: 0.9rem;
    color: #666;
}

small {
    color: #666;
    font-size: 0.85rem;
    display: block;
    margin-top: 5px;
}

.upload-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

.upload-btn:active {
    transform: translateY(0);
}

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

.loading-spinner {
    display: inline-block;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.status-card {
    border-left: 4px solid #28a745;
}

.status-card.error {
    border-left-color: #dc3545;
}

.status-card.warning {
    border-left-color: #ffc107;
}

.status-content {
    font-size: 1rem;
    line-height: 1.6;
}

.status-content.success {
    color: #155724;
    background: #d4edda;
    padding: 15px;
    border-radius: 8px;
}

.status-content.error {
    color: #721c24;
    background: #f8d7da;
    padding: 15px;
    border-radius: 8px;
}

.status-content.warning {
    color: #856404;
    background: #fff3cd;
    padding: 15px;
    border-radius: 8px;
}

.info-card h3 {
    margin-bottom: 20px;
    color: #555;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-card ul {
    list-style: none;
    padding-left: 0;
}

.info-card li {
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
    line-height: 1.5;
}

.info-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
}

.info-card code {
    background: #f8f9fa;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    color: #e83e8c;
}

footer {
    text-align: center;
    color: white;
    opacity: 0.8;
    margin-top: 40px;
}

footer a {
    color: white;
    text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,0.3);
    transition: all 0.3s ease;
}

footer a:hover {
    opacity: 1;
    border-bottom-color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .card, .status-card, .info-card {
        padding: 20px;
    }
    
    .form-group input[type="text"],
    .form-group input[type="file"] {
        padding: 12px;
    }
    
    .upload-btn {
        padding: 15px;
        font-size: 1rem;
    }
}

/* 动画效果 */
.card, .status-card, .info-card {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 进度条样式 */
.progress-bar {
    width: 100%;
    height: 8px;
    background: #e1e5e9;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

/* 拖拽区域样式 */
.form-group input[type="file"].dragover {
    border-color: #667eea;
    background-color: #f0f2ff;
    transform: scale(1.02);
}