body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f7fa;
    color: #333;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 2rem;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.panel {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hidden {
    display: none;
}

.control-group {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

label {
    font-weight: 500;
}

input[type="text"], input[type="number"], textarea, select {
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

textarea {
    width: 100%;
    max-width: 600px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s;
}

button:hover {
    background-color: #2980b9;
}

button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

.status {
    font-style: italic;
    color: #7f8c8d;
}

.status.success {
    color: #27ae60;
}
.status.error {
    color: #c0392b;
}

/* Logits Table */
.scrollable-table {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #eee;
}

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

th, td {
    padding: 0.35rem 0.75rem; /* Reduced vertical padding */
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background-color: #f8f9fa;
    position: sticky;
    top: 0;
}

tr:hover {
    background-color: #f1f1f1;
}

.btn-select-ref {
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    background-color: #9b59b6;
}

.btn-select-ref.selected {
    background-color: #27ae60;
}

/* Circuit Controls */
.controls-row {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 1rem;
}

.control-col {
    flex: 1;
}

.sub-opt {
    margin-left: 1rem;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.setting-item {
    margin-bottom: 0.8rem;
}

.input-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 4px;
}

.input-row input[type="range"] {
    flex: 1;
}

/* Canvas */
#canvas-container {
    position: relative;
    border: 1px solid #ddd;
    background: white;
    border-radius: 4px;
    overflow-x: auto;
}

canvas {
    display: block;
    cursor: crosshair;
}

#tooltip {
    position: fixed;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: 8px;
    border-radius: 4px;
    font-size: 12px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 1000;
}

/* Legend */
#vis-legend {
    margin-top: 1rem;
    font-size: 0.9rem;
}
.legend-box {
    display: inline-block;
    width: 15px;
    height: 15px;
    margin-right: 5px;
    margin-left: 10px;
    vertical-align: middle;
}
.legend-box.pos { background: rgba(255, 0, 0, 0.6); }
.legend-box.neg { background: rgba(0, 0, 255, 0.6); }

/* Input Attribution Styles */
.attribution-text-box {
    line-height: 1.6;
    font-size: 1.1em;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
    white-space: pre-wrap; /* Preserve spacing */
    font-family: monospace;
}

.token-span {
    padding: 2px 0;
    margin: 0;
    border-radius: 2px;
    transition: background-color 0.2s;
    cursor: default;
}

.token-span:hover {
    outline: 1px solid #333;
    position: relative;
    z-index: 10;
}

/* Loading Overlay */
#loading-overlay {
    position: fixed;
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}

#loading-overlay.hidden {
    display: none !important;
}

.spinner {
    border: 6px solid #f3f3f3;
    border-top: 6px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#loading-message {
    font-size: 1.2rem;
    font-weight: 500;
    color: #2c3e50;
}