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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

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

.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 15px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: #4a90d9;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-user {
    color: #666;
}

.nav-link {
    color: #666;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.3s;
}

.nav-link:hover {
    background-color: #f0f0f0;
    color: #333;
}

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.auth-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.auth-box h1 {
    text-align: center;
    color: #333;
    margin-bottom: 10px;
    font-size: 1.8rem;
}

.auth-box h2 {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    font-size: 1.2rem;
    font-weight: normal;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #4a90d9;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #4a90d9;
    color: white;
}

.btn-primary:hover {
    background-color: #357abd;
}

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

.btn-secondary:hover {
    background-color: #545b62;
}

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

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

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

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

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

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

.btn-block {
    width: 100%;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.auth-links {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.auth-links a {
    color: #4a90d9;
    text-decoration: none;
}

.auth-links a:hover {
    text-decoration: underline;
}

.converter-section {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.converter-section h2 {
    margin-bottom: 20px;
    color: #333;
}

.upload-area {
    border: 2px dashed #ddd;
    border-radius: 10px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    max-width: 500px;
    margin: 0 auto 20px;
}

.upload-area:hover {
    border-color: #4a90d9;
    background-color: #f8f9ff;
}

.upload-area.dragover {
    border-color: #4a90d9;
    background-color: #f0f4ff;
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.upload-hint {
    color: #999;
    font-size: 14px;
    margin-top: 10px;
}

.history-section {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.history-section h3 {
    margin-bottom: 20px;
    color: #333;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    font-weight: 600;
    color: #555;
    background-color: #f8f9fa;
}

.table tr:hover {
    background-color: #f8f9fa;
}

.status {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.status-pending {
    background-color: #fff3cd;
    color: #856404;
}

.status-processing {
    background-color: #cce5ff;
    color: #004085;
}

.status-completed {
    background-color: #d4edda;
    color: #155724;
}

.status-failed {
    background-color: #f8d7da;
    color: #721c24;
}

.no-data {
    text-align: center;
    color: #999;
    padding: 40px;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    width: 90%;
    max-width: 400px;
    text-align: center;
}

.modal-content h3 {
    margin-bottom: 20px;
    color: #333;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #f0f0f0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 20px;
}

.progress-fill {
    height: 100%;
    background-color: #4a90d9;
    border-radius: 10px;
    transition: width 0.3s ease;
}

.progress-text {
    margin-bottom: 15px;
    color: #666;
}

.progress-details {
    font-size: 14px;
    color: #999;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.queue-info-bar {
    background-color: #e3f2fd;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid #2196f3;
}

.queue-info-bar span {
    color: #1976d2;
    font-weight: 500;
}

.queue-status {
    text-align: center;
    padding: 20px 0;
}

.queue-text {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.queue-info {
    color: #666;
    margin-bottom: 25px;
}

.queue-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

@media (max-width: 768px) {
    .queue-info-bar {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .queue-actions {
        flex-direction: column;
    }
    
    .queue-text {
        font-size: 16px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 15px;
        padding: 0 10px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .nav-link {
        padding: 6px 12px;
        font-size: 14px;
    }
    
    .container {
        padding: 10px;
    }
    
    .converter-section,
    .history-section {
        padding: 20px 15px;
        margin-bottom: 20px;
    }
    
    .converter-section h2,
    .history-section h3 {
        font-size: 1.2rem;
        text-align: center;
    }
    
    .upload-area {
        padding: 30px 15px;
        min-height: 200px;
    }
    
    .upload-icon {
        font-size: 36px;
    }
    
    .upload-hint {
        font-size: 12px;
    }
    
    .form-group {
        margin-bottom: 15px;
    }
    
    .form-group label {
        font-size: 14px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px;
        font-size: 14px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .table {
        font-size: 12px;
        overflow-x: auto;
        display: block;
    }
    
    .table th,
    .table td {
        padding: 6px;
        white-space: nowrap;
    }
    
    .table th {
        font-size: 11px;
    }
    
    .status {
        font-size: 10px;
        padding: 2px 8px;
    }
    
    .modal-content {
        padding: 20px 15px;
        width: 95%;
        max-width: 320px;
    }
    
    .modal-content h3 {
        font-size: 1.1rem;
    }
    
    .progress-bar {
        height: 16px;
    }
    
    .auth-box {
        padding: 30px 20px;
        max-width: 320px;
    }
    
    .auth-box h1 {
        font-size: 1.5rem;
    }
    
    .auth-box h2 {
        font-size: 1rem;
    }
    
    .checkbox-label {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .nav-brand {
        font-size: 1.2rem;
    }
    
    .upload-area {
        padding: 20px 10px;
    }
    
    .upload-text {
        font-size: 14px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .converter-section h2,
    .history-section h3 {
        font-size: 1.1rem;
    }
    
    .modal-content {
        padding: 15px 10px;
    }
}