css/styles.css

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

:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #9b59b6;
    --warning-color: #e74c3c;
    --info-color: #f39c12;
    --background-color: #f8f9fa;
    --card-background: #ffffff;
    --text-color: #2c3e50;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --transition-speed: 0.3s;
    
    /* New node color variables */
    --input-node-color-1: #3498db;
    --input-node-color-2: #1abc9c;
    --hidden-node-color-1: #9b59b6;
    --hidden-node-color-2: #8e44ad;
    --output-node-color-1: #2ecc71;
    --output-node-color-2: #27ae60;
    --conv-node-color-1: #f39c12;
    --conv-node-color-2: #e67e22;
    --pool-node-color-1: #e74c3c;
    --pool-node-color-2: #c0392b;
    --node-glow: 0 0 15px rgba(255, 255, 255, 0.8);
    --linear-node-color-1: #1abc9c;
    --linear-node-color-2: #16a085;
    --lstm-node-color-1: #9c88ff;
    --lstm-node-color-2: #8c7ae6;
    --rnn-node-color-1: #00cec9;
    --rnn-node-color-2: #00b894;
    --gru-node-color-1: #fd79a8;
    --gru-node-color-2: #e84393;
}

body {
    font-family: 'Roboto', 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    padding-bottom: 2rem;
}

header {
    background: linear-gradient(135deg, #3498db, #9b59b6);
    color: white;
    text-align: center;
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-md);
    position: relative;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
}

header h1 {
    position: relative;
    z-index: 1;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr 2.5fr 1fr;
    gap: 1.5rem;
}

.tools-panel, .properties-panel {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    height: 85vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.canvas-container {
    grid-column: 2;
    position: relative;
    overflow: hidden;
}

.network-canvas {
    width: 100%;
    height: 100%;
    position: relative;
    background: var(--background-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.node-types {
    margin-top: 1.5rem;
}

.node-item {
    padding: 0.8rem 1rem;
    border-radius: var(--border-radius);
    background: var(--background-color);
    cursor: grab;
    transition: all var(--transition-speed) ease;
    margin-bottom: 0.8rem;
    position: relative;
    display: flex;
    align-items: center;
    border: 1px solid var(--border-color);
}

.node-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.node-item[data-type="input"] {
    background: linear-gradient(135deg, var(--input-node-color-1), var(--input-node-color-2));
    border-color: var(--input-node-color-1);
    color: white;
}

.node-item[data-type="hidden"] {
    background: linear-gradient(135deg, var(--hidden-node-color-1), var(--hidden-node-color-2));
    border-color: var(--hidden-node-color-1);
    color: white;
}

.node-item[data-type="output"] {
    background: linear-gradient(135deg, var(--output-node-color-1), var(--output-node-color-2));
    border-color: var(--output-node-color-1);
    color: white;
}

.node-item[data-type="conv"] {
    background: linear-gradient(135deg, var(--conv-node-color-1), var(--conv-node-color-2));
    border-color: var(--conv-node-color-1);
    color: white;
}

.node-item[data-type="pool"] {
    background: linear-gradient(135deg, var(--pool-node-color-1), var(--pool-node-color-2));
    border-color: var(--pool-node-color-1);
    color: white;
}

.node-item[data-type="linear"] {
    background-image: linear-gradient(135deg, var(--linear-node-color-1), var(--linear-node-color-2));
    border-bottom: 3px solid var(--linear-node-color-2);
    box-shadow: var(--shadow-sm);
}

.node-icon {
    width: 24px;
    height: 24px;
    margin-right: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.8);
}

.node-icon svg {
    width: 16px;
    height: 16px;
}

.node {
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-size: 0.95rem;
    color: white;
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.node::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
    z-index: 0;
}

.node::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.1) 50%, rgba(255, 255, 255, 0) 100%);
    transform: rotate(45deg);
    animation: shimmer 3s infinite;
    z-index: 1;
    pointer-events: none;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) rotate(45deg); }
    100% { transform: translateX(100%) rotate(45deg); }
}

.node:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(255, 255, 255, 0.2);
}

.input-node {
    background: linear-gradient(135deg, var(--input-node-color-1), var(--input-node-color-2));
    border: 2px solid var(--input-node-color-1);
    color: white;
}

.hidden-node {
    background: linear-gradient(135deg, var(--hidden-node-color-1), var(--hidden-node-color-2));
    border: 2px solid var(--hidden-node-color-1);
    color: white;
}

.output-node {
    background: linear-gradient(135deg, var(--output-node-color-1), var(--output-node-color-2));
    border: 2px solid var(--output-node-color-1);
    color: white;
}

.conv-node {
    background: linear-gradient(135deg, var(--conv-node-color-1), var(--conv-node-color-2));
    border: 2px solid var(--conv-node-color-1);
    color: white;
}

.pool-node {
    background: linear-gradient(135deg, var(--pool-node-color-1), var(--pool-node-color-2));
    border: 2px solid var(--pool-node-color-1);
    color: white;
}

.linear-node {
    background-image: linear-gradient(135deg, var(--linear-node-color-1), var(--linear-node-color-2));
    position: relative;
    border-radius: var(--border-radius);
}

.controls {
    margin-top: 2rem;
}

button {
    display: block;
    width: 100%;
    padding: 0.9rem;
    margin-bottom: 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

button::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0));
    z-index: 0;
}

button:hover {
    background: linear-gradient(135deg, var(--primary-color), #3a5ca9);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h2 {
    margin-bottom: 1.25rem;
    color: var(--secondary-color);
    font-size: 1.25rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 0.75rem;
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

#node-properties {
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 8px;
    min-height: 180px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
    line-height: 1.7;
}

#node-properties strong {
    color: var(--primary-color);
}

.tooltip {
    position: absolute;
    background: rgba(44, 62, 80, 0.95);
    color: white;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 1000;
    max-width: 300px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transform: translateY(10px);
    backdrop-filter: blur(2px);
}

.tooltip.visible {
    opacity: 1;
    transform: translateY(0);
}

.tooltip-content {
    line-height: 1.6;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--secondary-color), #34495e);
    color: white;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect fill="none" width="100" height="100"/><circle fill="rgba(255,255,255,0.05)" cx="25" cy="25" r="5"/><circle fill="rgba(255,255,255,0.05)" cx="75" cy="25" r="5"/><circle fill="rgba(255,255,255,0.05)" cx="25" cy="75" r="5"/><circle fill="rgba(255,255,255,0.05)" cx="75" cy="75" r="5"/></svg>');
    opacity: 0.4;
    z-index: 0;
}

footer p {
    position: relative;
    z-index: 1;
}

/* Styles for nodes on the canvas */
.canvas-node {
    position: absolute;
    width: 180px;
    min-height: 120px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    padding: 0;
    cursor: move;
    transition: all 0.2s ease-in-out;
    z-index: 2;
    display: flex;
    flex-direction: column;
}

.canvas-node .node-header {
    padding: 8px 12px;
    font-weight: bold;
    border-radius: 8px 8px 0 0;
    color: white;
    background-color: rgba(0, 0, 0, 0.2);
    text-align: center;
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.canvas-node .node-content {
    padding: 8px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.shape-info {
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    padding: 6px;
}

.shape-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: white;
    padding: 2px 0;
}

.shape-label {
    font-weight: bold;
}

.params-section {
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    padding: 6px;
}

.params-display {
    font-family: monospace;
    font-size: 11px;
    color: white;
    margin: 0;
    white-space: pre-wrap;
}

.canvas-node.dragging {
    cursor: grabbing;
    box-shadow: var(--shadow-lg), 0 0 25px rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
    z-index: 100;
}

.canvas-node[data-type="input"] {
    background: linear-gradient(135deg, var(--input-node-color-1), var(--input-node-color-2), var(--input-node-color-1));
    border: 2px solid var(--input-node-color-1);
}

.canvas-node[data-type="hidden"] {
    background: linear-gradient(135deg, var(--hidden-node-color-1), var(--hidden-node-color-2), var(--hidden-node-color-1));
    border: 2px solid var(--hidden-node-color-1);
}

.canvas-node[data-type="output"] {
    background: linear-gradient(135deg, var(--output-node-color-1), var(--output-node-color-2), var(--output-node-color-1));
    border: 2px solid var(--output-node-color-1);
}

.canvas-node[data-type="conv"] {
    background: linear-gradient(135deg, var(--conv-node-color-1), var(--conv-node-color-2), var(--conv-node-color-1));
    border: 2px solid var(--conv-node-color-1);
}

.canvas-node[data-type="pool"] {
    background: linear-gradient(135deg, var(--pool-node-color-1), var(--pool-node-color-2), var(--pool-node-color-1));
    border: 2px solid var(--pool-node-color-1);
}

.canvas-node[data-type="linear"] {
    background-image: linear-gradient(135deg, var(--linear-node-color-1), var(--linear-node-color-2));
    border: 2px solid var(--linear-node-color-2);
}

.canvas-node .node-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 2;
}

.canvas-node .node-id {
    position: absolute;
    top: 8px;
    right: 10px;
    font-size: 0.7rem;
    color: white;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    padding: 0 5px;
    z-index: 2;
}

.canvas-node .node-dimensions {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 2;
}

.canvas-node::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
    z-index: 1;
    border-radius: var(--border-radius);
    pointer-events: none;
}

.connection {
    position: absolute;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform-origin: 0 0;
    pointer-events: none;
    z-index: 5;
    box-shadow: 0 0 8px rgba(52, 152, 219, 0.5);
}

.connection::after {
    content: '';
    position: absolute;
    right: -5px;
    top: -5px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-color);
    box-shadow: 0 0 8px rgba(155, 89, 182, 0.8);
}

.temp-connection {
    background: linear-gradient(90deg, rgba(52, 152, 219, 0.5), rgba(155, 89, 182, 0.5));
    box-shadow: 0 0 12px rgba(52, 152, 219, 0.3);
    transition: none;
}

.temp-connection::after {
    background: rgba(155, 89, 182, 0.7);
    box-shadow: 0 0 12px rgba(155, 89, 182, 0.5);
}

.connected-node {
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.2), var(--shadow-sm);
}

.canvas-tooltip {
    position: absolute;
    background: white;
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    max-width: 300px;
    display: none;
    pointer-events: none;
    border: 1px solid var(--border-color);
}

.tooltip-header {
    font-weight: 600;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

.tooltip-content {
    font-size: 0.9rem;
}

.tooltip-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.3rem;
}

.tooltip-label {
    color: #666;
}

.tooltip-value {
    font-weight: 500;
}

.control-group {
    margin-bottom: 1.5rem;
}

.sample-data {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.sample-item {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sample-item:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-sm);
}

.sample-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.button-group {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.btn {
    padding: 0.7rem 1.2rem;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-speed) ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #27ae60;
}

.btn-danger {
    background: var(--warning-color);
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
}

.btn-icon {
    margin-right: 0.5rem;
}

.network-settings {
    margin-bottom: 1.5rem;
}

.setting-group {
    margin-bottom: 1rem;
}

.setting-group label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.5rem;
    display: block;
}

.range-slider {
    width: 100%;
    -webkit-appearance: none;
    height: 6px;
    border-radius: 5px;
    background: #ddd;
    outline: none;
    margin: 10px 0;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.range-slider::-webkit-slider-thumb:hover {
    background: #2980b9;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.3);
}

.range-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.range-slider::-moz-range-thumb:hover {
    background: #2980b9;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.3);
}

.setting-value {
    display: flex;
    justify-content: flex-end;
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
    text-align: right;
    margin-top: 0.3rem;
}

select {
    width: 100%;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background: white;
    font-size: 0.9rem;
    color: var(--text-color);
    cursor: pointer;
}

.props-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.props-section {
    margin-bottom: 1.5rem;
}

.props-heading {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

.props-heading i {
    margin-right: 0.5rem;
}

.props-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.props-key {
    color: #666;
    font-size: 0.9rem;
}

.props-value {
    font-weight: 500;
    font-size: 0.9rem;
}

.activation-function {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.activation-graph {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
    width: 100%;
    height: 150px;
    position: relative;
    overflow: hidden;
}

.activation-curve {
    width: 100%;
    height: 100%;
    display: block;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
}

.layer-weights {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1rem;
}

.weights-img {
    max-width: 100%;
    border-radius: var(--border-radius);
}

.training-progress {
    margin-bottom: 1.5rem;
}

.progress-bar-container {
    width: 100%;
    height: 10px;
    background: #f0f0f0;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 5px;
    transition: width 0.3s ease;
    width: 0%;
}

.metrics {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
}

.metric {
    text-align: center;
    flex: 1;
}

.metric-value {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary-color);
}

.metric-label {
    font-size: 0.8rem;
    color: #666;
}

.node-controls {
    position: absolute;
    top: 4px;
    right: 4px;
    display: flex;
    justify-content: flex-end;
    z-index: 2;
}

.node-edit-btn, .node-delete-btn {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(0, 0, 0, 0.1);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    transition: all 0.2s ease;
    margin-left: 0.3rem;
    font-size: 14px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
}

.node-edit-btn:hover {
    background: #e0e0e0;
}

.node-delete-btn {
    color: #b71c1c;
    font-weight: bold;
}

.node-delete-btn:hover {
    background: #ffcdd2;
    color: #d50000;
}

.icon {
    font-style: normal;
    font-size: 16px;
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: modalFadeIn 0.3s;
}

.close-modal {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 1.5rem;
    color: #aaa;
    cursor: pointer;
    transition: color 0.2s ease;
}

.close-modal:hover {
    color: var(--text-color);
}

.modal-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-section {
    margin-bottom: 2rem;
}

.modal-section-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.modal-text {
    line-height: 1.7;
    margin-bottom: 1rem;
}

.modal-list {
    list-style: none;
    margin: 1rem 0;
}

.modal-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: flex-start;
}

.modal-list li::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* Footer styles */
.footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem;
    background: white;
    box-shadow: var(--shadow-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.footer-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: #2980b9;
    text-decoration: underline;
}

.footer-text {
    color: #666;
    font-size: 0.9rem;
}

/* Animation keyframes */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.5);
    }
    70% {
        box-shadow: 0 0 0 5px rgba(46, 204, 113, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(46, 204, 113, 0);
    }
}

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

/* Layer editor modal styles */
.layer-editor-modal .modal-content {
    max-width: 550px;
}

.layer-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 20px;
}

/* Modal footer styling */
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.modal-footer button {
    padding: 8px 16px;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.modal-footer .save-layer-btn {
    background-color: var(--primary-color);
    color: white;
}

.modal-footer .close-modal {
    background-color: #f1f1f1;
    color: #333;
    position: static;
    font-size: 14px;
}

.modal-footer .close-modal:hover {
    background-color: #e0e0e0;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.3rem;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.form-grid-full {
    grid-column: 1 / -1;
}

.parameters-preview {
    grid-column: 1 / -1;
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-top: 1rem;
}

.parameters-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-size: 0.9rem;
}

.parameters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.5rem;
}

.parameter-item {
    background: white;
    border-radius: var(--border-radius);
    padding: 0.7rem;
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.parameter-value {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.parameter-label {
    font-size: 0.8rem;
    color: #666;
}

/* Responsive styles */
@media screen and (max-width: 1200px) {
    .container {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    
    .tools-panel, .canvas-container, .props-panel {
        grid-column: 1;
        height: auto;
    }
    
    .tools-panel {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
        height: auto;
    }
    
    .network-canvas {
        height: 60vh;
    }
    
    .canvas-node {
        width: 160px;
    }
}

@media screen and (max-width: 768px) {
    .tools-panel {
        grid-template-columns: 1fr;
    }
    
    .canvas-node {
        width: 140px;
        padding: 0.6rem;
    }
    
    .header-title {
        font-size: 2rem;
    }
    
    .button-group {
        flex-wrap: wrap;
    }
    
    .btn {
        flex: 1;
        min-width: 120px;
    }
    
    .props-row {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .props-value {
        margin-top: 0.3rem;
    }
}

/* Highlights and animations */
.highlight-pulse {
    animation: highlightPulse 1.5s ease-in-out;
}

@keyframes highlightPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0.5);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(52, 152, 219, 0.3);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0);
    }
}

.node-port {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: white;
    border: 2px solid #aaa;
    position: absolute;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 20;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

.port-in {
    top: 50%;
    left: -7px;
    transform: translateY(-50%);
}

.port-out {
    top: 50%;
    right: -7px;
    transform: translateY(-50%);
}

.port-in:hover, .port-out:hover, .port-hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: white;
    transform: translateY(-50%) scale(1.3);
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.8);
}

.active-port {
    background: rgba(255, 255, 255, 0.9);
    border-color: white;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.8);
    animation: portPulse 1.5s infinite;
}

@keyframes portPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(255, 255, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    }
}

.valid-target {
    background: var(--secondary-color);
    border-color: white;
    animation: validPulse 1.5s infinite;
}

@keyframes validPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.7);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(46, 204, 113, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(46, 204, 113, 0);
    }
}

.invalid-target {
    background: var(--warning-color);
    border-color: white;
    cursor: not-allowed;
    animation: invalidPulse 1.5s infinite;
}

@keyframes invalidPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.7);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(231, 76, 60, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(231, 76, 60, 0);
    }
}

/* Style for connection ports */
.port {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: white;
    border: 2px solid rgba(0, 0, 0, 0.3);
    z-index: 3;
    transition: all 0.2s ease;
}

.port:hover {
    transform: scale(1.5);
    box-shadow: 0 0 5px rgba(255, 255, 255, 0.8);
}

.input-port {
    top: 50%;
    left: -6px;
    transform: translateY(-50%);
}

.output-port {
    top: 50%;
    right: -6px;
    transform: translateY(-50%);
}

/* Connection line styles */
.connection-line {
    stroke: rgba(255, 255, 255, 0.7);
    stroke-width: 2;
    fill: none;
    pointer-events: none;
}

.connection-line-temp {
    stroke: rgba(255, 255, 255, 0.5);
    stroke-dasharray: 5, 5;
    stroke-width: 2;
    fill: none;
}

/* Tab Navigation */
.tabs-container {
    margin-top: 20px;
    width: 100%;
    display: flex;
    justify-content: center;
}

.tab-nav {
    display: flex;
    gap: 10px;
    background-color: #f5f5f7;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tab-button {
    padding: 10px 20px;
    background-color: transparent;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    color: #555;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-button:hover {
    background-color: rgba(0,0,0,0.05);
}

.tab-button.active {
    background-color: #3498db;
    color: white;
}

.tab-content {
    display: none;
    width: 100%;
}

.tab-content.active {
    display: block;
}

/* Backpropagation Tab Styles */
.backprop-container {
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 20px;
    margin: 20px auto;
    max-width: 1600px;
}

.backprop-info-panel {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
}

.intro-text {
    line-height: 1.6;
    margin-bottom: 20px;
    color: #555;
}

.backprop-steps {
    margin-bottom: 20px;
}

.backprop-steps ol {
    padding-left: 25px;
}

.backprop-steps li {
    margin-bottom: 15px;
}

.backprop-steps strong {
    color: #333;
    display: block;
    margin-bottom: 5px;
}

.backprop-steps p {
    color: #666;
    margin: 0;
    font-size: 14px;
}

.backprop-controls {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.backprop-controls button {
    padding: 10px 15px;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

#start-animation {
    background-color: #2ecc71;
    color: white;
}

#pause-animation {
    background-color: #f39c12;
    color: white;
}

#reset-animation {
    background-color: #e74c3c;
    color: white;
}

.backprop-controls button:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.speed-control label {
    font-size: 14px;
    color: #666;
}

.speed-control input {
    flex: 1;
}

.backprop-visualization {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.animation-container {
    position: relative;
    min-height: 400px;
    background-color: #f8f9fa;
    border-radius: 8px;
    overflow: hidden;
}

#backprop-canvas {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.animation-overlay {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 15px;
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

#current-step-info h4 {
    margin: 0 0 10px 0;
    color: #333;
}

#step-name {
    color: #3498db;
    font-weight: 600;
}

#step-description {
    margin: 0;
    color: #555;
    font-size: 14px;
}

.formula-section {
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.formula-display {
    margin: 15px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.formula {
    display: flex;
    flex-direction: column;
    padding: 10px;
    background-color: #fff;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.formula-title {
    font-size: 14px;
    color: #666;
    margin-bottom: 5px;
}

.formula-math {
    font-family: 'Times New Roman', serif;
    font-size: 20px;
    color: #333;
    padding: 5px 0;
}

.formula-explanation {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

.backprop-details-panel {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
}

.animation-legend {
    margin: 15px 0 25px;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.color-box {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    margin-right: 10px;
}

.forward-color {
    background-color: #3498db;
}

.error-color {
    background-color: #e74c3c;
}

.backward-color {
    background-color: #9b59b6;
}

.update-color {
    background-color: #2ecc71;
}

.variable-display {
    margin-top: 20px;
}

.variable-display h4 {
    margin-bottom: 15px;
    color: #333;
}

#variables-container {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    min-height: 150px;
}

/* Responsive styles for backpropagation tab */
@media (max-width: 1200px) {
    .backprop-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    
    .animation-container {
        min-height: 300px;
    }
}

/* Forward Propagation Tab Styles */
.forward-container {
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 20px;
    margin: 20px auto;
    max-width: 1600px;
}

.forward-info-panel {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
}

.forward-steps {
    margin-bottom: 20px;
}

.forward-steps ol {
    padding-left: 25px;
}

.forward-steps li {
    margin-bottom: 15px;
}

.forward-steps strong {
    color: #333;
    display: block;
    margin-bottom: 5px;
}

.forward-steps p {
    color: #666;
    margin: 0;
    font-size: 14px;
}

.forward-controls {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.forward-controls button {
    padding: 10px 15px;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

#start-forward-animation {
    background-color: #2ecc71;
    color: white;
}

#pause-forward-animation {
    background-color: #f39c12;
    color: white;
}

#reset-forward-animation {
    background-color: #e74c3c;
    color: white;
}

.data-input-control {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.data-input-control label {
    font-size: 14px;
    color: #666;
}

.data-input-control select {
    padding: 8px;
    border-radius: 6px;
    border: 1px solid #ddd;
}

.forward-visualization {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.computation-section {
    background-color: #f8f9fa;
    border-radius: 8px;
    padding: 15px;
}

.computation-display {
    background-color: white;
    border-radius: 6px;
    padding: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin: 15px 0;
}

#computation-values {
    font-family: 'Courier New', monospace;
    background-color: #f8f9fa;
    border-radius: 6px;
    padding: 10px;
    max-height: 150px;
    overflow-y: auto;
    font-size: 14px;
}

.forward-details-panel {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
}

.network-architecture {
    margin-bottom: 20px;
}

.architecture-info {
    background-color: #f8f9fa;
    border-radius: 6px;
    padding: 12px;
    margin-top: 10px;
}

.architecture-info p {
    margin: 5px 0;
    font-size: 14px;
}

.activation-functions {
    margin-top: 20px;
}

.function-item {
    background-color: #f8f9fa;
    border-radius: 6px;
    padding: 10px;
    margin-top: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.function-name {
    font-weight: 500;
    font-size: 14px;
}

.function-formula {
    font-family: 'Times New Roman', serif;
    font-size: 16px;
}

/* Background Animation Tab Styles */
.background-animation-container {
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 20px;
    margin: 20px auto;
    max-width: 1600px;
}

.background-info-panel {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
}

.visualization-controls {
    margin-top: 20px;
}

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

.control-item {
    margin: 15px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-item label {
    font-size: 14px;
    color: #666;
}

.control-item input[type="range"] {
    width: 100%;
}

.control-item select {
    padding: 8px;
    border-radius: 6px;
    border: 1px solid #ddd;
}

.animation-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

.animation-buttons button {
    padding: 10px 15px;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

#start-background-animation {
    background-color: #2ecc71;
    color: white;
}

#pause-background-animation {
    background-color: #f39c12;
    color: white;
}

#reset-background-animation {
    background-color: #e74c3c;
    color: white;
}

.background-visualization {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
    position: relative;
    min-height: 500px;
}

#background-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    background-color: #f8f9fa;
}

.background-details-panel {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
}

.background-details-panel p {
    margin-bottom: 15px;
    color: #555;
    font-size: 14px;
    line-height: 1.6;
}

.stats-panel {
    margin-top: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    padding: 15px;
}

.stats-panel h4 {
    margin-bottom: 10px;
    color: #333;
}

#stats-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    text-align: center;
}

.stat-item {
    background-color: white;
    border-radius: 6px;
    padding: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-label {
    font-size: 12px;
    color: #666;
    margin-bottom: 5px;
}

.stat-value {
    font-size: 16px;
    font-weight: 600;
    color: #3498db;
}

/* Neuron animations */
@keyframes neuronPulse {
    0% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(1); opacity: 0.7; }
}

@keyframes connectionPulse {
    0% { opacity: 0.2; }
    50% { opacity: 0.8; }
    100% { opacity: 0.2; }
}

/* Responsive styles for new tabs */
@media (max-width: 1200px) {
    .forward-container,
    .background-animation-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    
    .background-visualization {
        min-height: 400px;
    }
    
    #stats-container {
        grid-template-columns: 1fr;
    }
}

.lstm-node {
    background: linear-gradient(135deg, var(--lstm-node-color-1), var(--lstm-node-color-2));
    border: 2px solid var(--lstm-node-color-1);
    color: white;
}

.rnn-node {
    background: linear-gradient(135deg, var(--rnn-node-color-1), var(--rnn-node-color-2));
    border: 2px solid var(--rnn-node-color-1);
    color: white;
}

.gru-node {
    background: linear-gradient(135deg, var(--gru-node-color-1), var(--gru-node-color-2));
    border: 2px solid var(--gru-node-color-1);
    color: white;
}

.canvas-node[data-type="lstm"] {
    background: linear-gradient(135deg, var(--lstm-node-color-1), var(--lstm-node-color-2), var(--lstm-node-color-1));
    border: 2px solid var(--lstm-node-color-1);
}

.canvas-node[data-type="rnn"] {
    background: linear-gradient(135deg, var(--rnn-node-color-1), var(--rnn-node-color-2), var(--rnn-node-color-1));
    border: 2px solid var(--rnn-node-color-1);
}

.canvas-node[data-type="gru"] {
    background: linear-gradient(135deg, var(--gru-node-color-1), var(--gru-node-color-2), var(--gru-node-color-1));
    border: 2px solid var(--gru-node-color-1);
}