* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
/* 
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #ffffff;
    color: #1f2937;
    line-height: 1.6;
} */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    overflow-x: hidden;
}

/* Header Styles */
header {
    text-align: center;
     background: linear-gradient(135deg, #9CA1E2 0%, #4b85e6 50%, #9CA1E2 100%);
    color: white !important;
    padding: 20px;
    border-radius: 15px;
/*     margin-bottom: 30px; */
    box-shadow: 0 10px 30px rgba(30, 58, 138, 0.2);
}




header h1 {
    font-size: 45px !important;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* Main Content Layout */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: start;
}

/* Input Panel */
.input-panel {
    background: #EFF6FF !important;
    border-radius: 12px !important;
    padding: 25px !important;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.1);
    border: 1px solid #DBEAFE;
}

.input-modes {
    display: flex;
    margin-bottom: 25px;
    background: #DBEAFE !important;
    border-radius: 8px !important;
    padding: 4px !important;
}

.mode-btn {
    flex: 1;
    padding: 12px 16px !important;
    border: none !important;
    background: transparent !important;
    color: #3B82F6 !important;
    cursor: pointer;
    border-radius: 6px !important;
    font-weight: 500;
    transition: all 0.2s ease;
}

.mode-btn.active {
    background: linear-gradient(135deg, #9CA1E2 0%, #4b85e6 50%, #9CA1E2 100%) !important;
    color: white !important;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.mode-btn:hover:not(.active) {
    background: #BFDBFE !important;
}

/* Input Sections */
.input-section {
    margin-bottom: 25px;
}

.input-section.hidden {
    display: none;
}

.input-section h3 {
    color: #1E40AF !important;
    margin-bottom: 15px !important;
    font-size: 1.2rem;
    font-weight: 600;
}

.input-row {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.input-row input {
    flex: 1;
    padding: 12px 16px !important;
    border: 2px solid #DBEAFE !important;
    border-radius: 8px !important;
    font-size: 14px !important;
    transition: all 0.2s ease;
    background: white;
}

.input-row input:focus {
    outline: none !important;
    border-color: #3B82F6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.add-btn {
    padding: 12px 20px !important;
   background: linear-gradient(135deg, #9CA1E2 0%, #4b85e6 50%, #9CA1E2 100%) !important;
    color: white !important;
    border: none !important;
    border-radius: 8px !important;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.add-btn:hover {
    background: #2563EB;
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Data Points List */
.data-points-list h4 {
    color: #1E40AF;
    margin-bottom: 10px;
    font-size: 1rem;
}

.points-container {
    max-height: 200px;
    overflow-y: auto;
    background: white;
    border-radius: 8px !important;
    padding: 15px !important;
    border: 1px solid #DBEAFE !important;
}

.point-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px !important;
    margin: 5px 0;
    background: #F8FAFC !important;
    border-radius: 6px !important;
    border: 1px solid #E2E8F0 !important;
}

.point-item:hover {
    background: #F1F5F9;
}

.point-text {
    font-family: 'Courier New', monospace;
    color: #374151;
}

.remove-point {
    background: #EF4444 !important;
    color: white !important;
    border: none !important;
    padding: 4px 8px !important;
    border-radius: 4px !important;
    cursor: pointer;
    font-size: 12px !important;
    transition: all 0.2s ease;
}

.remove-point:hover {
    background: #DC2626;
}

.no-points {
    color: #6B7280 !important;
    font-style: italic;
    text-align: center;
    padding: 20px !important;
}

/* Equation Section */
.equation-input {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.equation-input label {
    font-weight: 600;
    color: #1E40AF !important;
    font-size: 1.1rem;
}

.equation-input input {
    flex: 1;
    padding: 12px 16px !important;
    border: 2px solid #DBEAFE !important;
    border-radius: 8px !important;
    background: white !important;
    font-family: 'Courier New', monospace;
    transition: all 0.2s ease;
}

.equation-input input:focus {
    outline: none !important;
    border-color: #3B82F6 !important;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.equation-examples {
    background: white !important;
    padding: 15px !important;
    border-radius: 8px !important;
    border: 1px solid #DBEAFE !important;
}

.equation-examples p {
    color: #1E40AF !important;
    margin-bottom: 8px;
    font-weight: 600;
}

.equation-examples ul {
    list-style: none;
    padding-left: 0;
}

.equation-examples li {
    padding: 4px 0 !important;
    font-family: 'Courier New', monospace;
    color: #374151;
    background: #F8FAFC;
    padding: 6px 10px;
    margin: 4px 0;
    border-radius: 4px;
}

/* Controls */
.controls {
    border-top: 2px solid #DBEAFE !important;
    padding-top: 25px !important;
}

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

.control-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #1E40AF;
}

.control-group input[type="color"] {
    width: 60px;
    height: 40px;
    border: 2px solid #DBEAFE !important;
    border-radius: 8px;
    cursor: pointer;
    background: white !important;
    padding: 2px !important;
}

.control-group input[type="text"] {
    width: 100%;
    padding: 10px 14px !important;
    border: 2px solid #DBEAFE !important;
    border-radius: 8px !important;
    font-size: 14px;
    transition: all 0.2s ease;
    background: white;
}

.control-group input[type="text"]:focus {
    outline: none;
    border-color: #3B82F6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.checkbox-label {
    display: flex !important;
    align-items: center;
    cursor: pointer;
    font-weight: 500 !important;
    color: #374151 !important;
}

.checkbox-label input {
    margin-right: 10px;
    width: 18px;
    height: 18px;
    accent-color: #3B82F6;
}

.control-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.export-buttons {
    display: flex;
    gap: 10px;
}

.control-btn {
    padding: 12px 20px !important;
    border: none !important;
    border-radius: 8px !important;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.reset-btn {
    background: #EF4444 !important;
    color: white !important;
}

.reset-btn:hover {
    background: #DC2626;
    transform: translateY(-1px);
}

.export-btn {
    background: #10B981 !important;
    color: white;
    flex: 1;
}

.export-btn:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* Graph Panel */
.graph-panel {
    background: #EFF6FF !important;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.1);
    border: 1px solid #DBEAFE;
    min-width: 0;
}

.graph-container {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 15px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

#demandGraph {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    display: block;
}

.graph-info {
    text-align: center;
    color: #6B7280;
    font-style: italic;
    padding: 10px;
    background: white;
    border-radius: 8px;
    border: 1px solid #E5E7EB;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .header h1 {
        font-size: 35px !important;
    }
    
    .container {
        padding: 0px !important;
    }
    
    .graph-panel {
        order: -1;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
        max-width: 100vw;
    }
    
    .header {
        padding: 20px 15px;
        margin-bottom: 20px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .input-row {
        flex-direction: column;
    }
    
    .export-buttons {
        flex-direction: column;
    }
    
    .input-panel, .graph-panel {
        padding: 20px;
    }
    
    .equation-input {
        flex-direction: column;
        align-items: stretch;
    }
    
    .equation-input label {
        margin-bottom: 5px;
    }
    
    .main-content {
        gap: 15px;
    }
    
    #demandGraph {
        max-width: calc(100vw - 60px);
        width: auto;
        height: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 5px;
        max-width: 100vw;
        overflow-x: hidden;
    }
    
    .header h1 {
        font-size: 1.6rem;
    }
    
    .header {
        padding: 15px 10px;
        margin-bottom: 15px;
    }
    
    .input-modes {
        flex-direction: column;
    }
    
    .mode-btn {
        margin-bottom: 4px;
    }
    
    .input-panel, .graph-panel {
        padding: 15px;
    }
    
    .graph-container {
        padding: 10px;
        overflow: hidden;
    }
    
    .main-content {
        gap: 10px;
    }
    
    .input-row input {
        padding: 10px 12px;
        font-size: 16px;
    }
    
    .control-group input[type="text"] {
        padding: 10px 12px;
        font-size: 16px;
    }
    
    .graph-info {
        font-size: 14px;
        padding: 8px;
    }
}

/* Animation and Transitions */
.input-section {
    opacity: 1;
    transition: opacity 0.3s ease;
}

.input-section.hidden {
    opacity: 0;
    height: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.point-item {
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scrollbar Styling */
.points-container::-webkit-scrollbar {
    width: 6px;
}

.points-container::-webkit-scrollbar-track {
    background: #F3F4F6;
    border-radius: 3px;
}

.points-container::-webkit-scrollbar-thumb {
    background: #DBEAFE;
    border-radius: 3px;
}

.points-container::-webkit-scrollbar-thumb:hover {
    background: #BFDBFE;
}