/* Reset and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* Toolbar */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 10px 20px;
    color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.file-input-wrapper {
    background: rgba(255,255,255,0.2);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.file-input-wrapper:hover {
    background: rgba(255,255,255,0.3);
}

.file-input-wrapper input[type=file] {
    display: none;
}

.toolbar button {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toolbar button:hover {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.5);
}

#diagram-title {
    font-size: 18px;
    font-weight: 600;
}

/* Main container - flexbox layout */
.container {
    display: flex;
    height: calc(100vh - 60px);
    width: 100vw;
    gap: 0;
    overflow: hidden;
}

/* Network diagram section - left 70% */
#network {
    flex: 0 0 70%;
    height: 100%;
    background-color: #ffffff;
    border-right: 3px solid #e0e0e0;
    position: relative;
    overflow: hidden;
}

/* Selected item panel - right 30% */
#selected-item-panel {
    flex: 0 0 30%;
    height: 100%;
    background-color: #fafafa;
    border-left: 1px solid #ddd;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Panel header */
#selected-item-panel h3 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 16px 20px;
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-bottom: 2px solid rgba(255,255,255,0.1);
}

/* Details content area */
.details-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    overflow-x: hidden;
    background-color: #ffffff;
    margin: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    border: 1px solid #e8e8e8;
}

/* Scrollbar styling for webkit browsers */
.details-content::-webkit-scrollbar {
    width: 8px;
}

.details-content::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.details-content::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.details-content::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Form styling within details content */
.details-content h4 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 16px;
    font-weight: 600;
    border-bottom: 2px solid #3498db;
    padding-bottom: 8px;
}

.details-content p {
    margin-bottom: 12px;
    font-size: 14px;
    line-height: 1.5;
}

.details-content .label {
    font-weight: 600;
    color: #34495e;
    display: inline-block;
    min-width: 80px;
    margin-right: 8px;
}

/* Form input styling */
.details-content input[type="text"],
.details-content input[type="number"],
.details-content input[type="color"],
.details-content select,
.details-content textarea {
    width: 100%;
    padding: 8px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 12px;
}

.details-content input[type="text"]:focus,
.details-content input[type="number"]:focus,
.details-content input[type="color"]:focus,
.details-content select:focus,
.details-content textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.details-content input[type="color"] {
    height: 40px;
    padding: 4px;
    cursor: pointer;
}

/* Button styling */
.details-content button {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 10px;
    margin-bottom: 10px;
    box-shadow: 0 2px 4px rgba(52, 152, 219, 0.3);
}

.details-content button:hover {
    background: linear-gradient(135deg, #2980b9 0%, #1f5f8b 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.4);
}

.details-content button:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(52, 152, 219, 0.3);
}

/* Save button - special styling */
.details-content button.save-btn {
    background: linear-gradient(135deg, #27ae60 0%, #219a52 100%);
    box-shadow: 0 2px 4px rgba(39, 174, 96, 0.3);
}

.details-content button.save-btn:hover {
    background: linear-gradient(135deg, #219a52 0%, #1e8449 100%);
    box-shadow: 0 4px 8px rgba(39, 174, 96, 0.4);
}

/* Cancel button - special styling */
.details-content button.cancel-btn {
    background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%);
    box-shadow: 0 2px 4px rgba(149, 165, 166, 0.3);
}

.details-content button.cancel-btn:hover {
    background: linear-gradient(135deg, #7f8c8d 0%, #6c7b7d 100%);
    box-shadow: 0 4px 8px rgba(149, 165, 166, 0.4);
}

/* Form group styling */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    margin-bottom: 0;
}

/* Button container */
.button-container {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #e8e8e8;
}

/* Loop info styling */
.loop-info {
    background-color: #f8f9fa;
    border-left: 4px solid #3498db;
    padding: 15px;
    margin: 10px 0;
    border-radius: 0 6px 6px 0;
}

.loop-info.reinforcing {
    border-left-color: #e74c3c;
    background-color: #fdf2f2;
}

.loop-info.balancing {
    border-left-color: #27ae60;
    background-color: #f2fdf4;
}

/* Error message styling */
.error {
    background-color: #fee;
    color: #c33;
    padding: 15px;
    border-radius: 6px;
    border: 1px solid #fcc;
    margin: 10px 0;
}

/* Success message styling */
.success {
    background-color: #efe;
    color: #363;
    padding: 15px;
    border-radius: 6px;
    border: 1px solid #cfc;
    margin: 10px 0;
}

/* Responsive design */
@media (max-width: 1200px) {
    #network {
        flex: 0 0 65%;
    }
    
    #selected-item-panel {
        flex: 0 0 35%;
    }
}

@media (max-width: 992px) {
    .container {
        flex-direction: column;
        height: auto;
        min-height: 100vh;
    }
    
    #network {
        flex: 0 0 60vh;
        border-right: none;
        border-bottom: 3px solid #e0e0e0;
    }
    
    #selected-item-panel {
        flex: 1;
        min-height: 40vh;
        border-left: none;
        border-top: 1px solid #ddd;
    }
    
    #selected-item-panel h3 {
        font-size: 16px;
        padding: 12px 16px;
    }
    
    .details-content {
        margin: 8px;
        padding: 16px;
    }
}

@media (max-width: 768px) {
    #network {
        flex: 0 0 50vh;
    }
    
    #selected-item-panel h3 {
        font-size: 14px;
        padding: 10px 12px;
    }
    
    .details-content {
        margin: 6px;
        padding: 12px;
    }
    
    .details-content input[type="text"],
    .details-content input[type="number"],
    .details-content select,
    .details-content textarea {
        padding: 6px 10px;
        font-size: 13px;
    }
    
    .details-content button {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .button-container {
        flex-direction: column;
    }
    
    .button-container button {
        margin-right: 0;
    }
}

/* Animation for smooth transitions */
.details-content {
    transition: all 0.3s ease;
}

/* Custom focus styles for accessibility */
.details-content *:focus {
    outline: 2px solid #3498db;
    outline-offset: 2px;
}

/* Loading state */
.details-content.loading {
    opacity: 0.6;
    pointer-events: none;
}

.details-content.loading::before {
    content: "Loading...";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold;
    color: #666;
}
/* Section styling */
.section {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #e8e8e8;
}

.section h4 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 16px;
    font-weight: 600;
}

/* Loop item styling */
.loop-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    margin: 5px 0;
    background: #f8f9fa;
    border-radius: 4px;
    border: 1px solid #e9ecef;
}

.loop-item span {
    flex: 1;
    font-size: 14px;
}

.loop-item button {
    background: #007bff;
    color: white;
    border: none;
    padding: 4px 12px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 12px;
}

.loop-item button:hover {
    background: #0056b3;
}