/* Reset and Base Styles */
* {
    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: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Main Content */
.main {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* Admin Bar */
.admin-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 15px 20px;
    background: #f8f9fa;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-id-label {
    font-weight: 600;
    color: #6c757d;
    font-size: 0.9rem;
}

.user-id-value {
    font-family: 'Courier New', monospace;
    background: #e9ecef;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    color: #495057;
    border: 1px solid #dee2e6;
}

/* Upload Area */
.upload-section {
    margin-bottom: 40px;
}

.upload-area {
    border: 3px dashed #ddd;
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    background: #fafafa;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: #667eea;
    background: #f0f4ff;
    transform: translateY(-2px);
}

.upload-content {
    pointer-events: none;
}

.upload-icon {
    font-size: 4rem;
    color: #667eea;
    margin-bottom: 20px;
    display: block;
}

.upload-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #333;
}

.upload-content p {
    color: #666;
    font-size: 1.1rem;
}

.browse-link {
    color: #667eea;
    text-decoration: underline;
    cursor: pointer;
}

/* Settings Panel */
.settings-panel {
    margin-top: 30px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 15px;
    border: 1px solid #e9ecef;
}

.settings-panel h3 {
    margin-bottom: 20px;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.setting-group {
    display: flex;
    flex-direction: column;
}

.setting-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: #555;
}

.setting-group input,
.setting-group select {
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.setting-group input:focus,
.setting-group select:focus {
    outline: none;
    border-color: #667eea;
}

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

.checkbox-label input[type="checkbox"] {
    margin-right: 10px;
    transform: scale(1.2);
}

.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

/* Progress Section */
.progress-section {
    margin-bottom: 40px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 15px;
    border: 1px solid #e9ecef;
}

.progress-section h3 {
    margin-bottom: 20px;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

.progress-container {
    margin-bottom: 20px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #e9ecef;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 10px;
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    color: #555;
}

.upload-details {
    background: white;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    font-family: monospace;
    font-size: 14px;
    color: #666;
}

/* History Section */
.history-section h3 {
    margin-bottom: 20px;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

.history-list {
    max-height: 400px;
    overflow-y: auto;
}

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

.no-uploads i {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
}

.upload-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.upload-item:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transform: translateY(-1px);
}

.upload-item .status {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 15px;
}

.upload-item .status.uploading {
    background: #ffc107;
    animation: pulse 1.5s infinite;
}

.upload-item .status.completed {
    background: #28a745;
}

.upload-item .status.error {
    background: #dc3545;
}

.upload-item .info {
    flex: 1;
}

.upload-item .filename {
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.upload-item .details {
    font-size: 14px;
    color: #666;
}

.upload-item .progress {
    margin-left: 15px;
    font-weight: 600;
    color: #667eea;
}

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

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.toast {
    background: white;
    border-radius: 8px;
    padding: 15px 20px;
    margin-bottom: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border-left: 4px solid #667eea;
    animation: slideIn 0.3s ease;
    max-width: 300px;
}

.toast.success {
    border-left-color: #28a745;
}

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

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

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .main {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .upload-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .upload-item .progress {
        margin-left: 0;
        margin-top: 10px;
    }
}