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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

h1 {
    color: #333;
    margin-bottom: 30px;
    text-align: center;
    font-size: 2.5em;
}

h2 {
    color: #555;
    margin-bottom: 15px;
    font-size: 1.3em;
}

/* Mode Toggle Styles */
.mode-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    padding: 5px;
    background: #f0f0f0;
    border-radius: 12px;
}

.toggle-option {
    flex: 1;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toggle-option input[type="radio"] {
    display: none;
}

.toggle-label {
    display: block;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    color: #666;
    transition: all 0.3s ease;
}

.toggle-option input[type="radio"]:checked + .toggle-label {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.toggle-option:hover .toggle-label {
    background: #e0e0e0;
}

.toggle-option input[type="radio"]:checked + .toggle-label:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Input Section */
.input-section {
    margin-bottom: 30px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 600;
}

textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    resize: vertical;
    transition: border-color 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: #667eea;
}

.controls {
    display: flex;
    gap: 20px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.control-group {
    flex: 1;
    min-width: 200px;
}

.control-group input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.control-group input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
}

.control-group input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

button:active {
    transform: translateY(0);
}

/* Output Section */
.output-section {
    margin-top: 30px;
}

.output-box {
    background: #f8f9fa;
    border: 2px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    min-height: 150px;
    color: #333;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.output-box.loading {
    color: #999;
    font-style: italic;
}

/* Interactive Token Display */
.interactive-output {
    line-height: 2;
    font-size: 16px;
    white-space: normal;
}

.hoverable-token {
    position: relative;
    display: inline-block;
    padding: .5px;
    margin: 0 1px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: transparent;
}

.hoverable-token:hover {
    background: #e3f2fd;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
}

/* Tooltip for alternatives */
.token-tooltip {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: #2c3e50;
    color: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    min-width: 250px;
    max-width: 350px;
    transition: all 0.3s ease;
    pointer-events: none;
}

.token-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: #2c3e50;
}

.hoverable-token:hover .token-tooltip {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip-header {
    font-weight: 700;
    font-size: 0.9em;
    margin-bottom: 8px;
    color: #ecf0f1;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 4px;
}

.tooltip-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 6px;
    margin: 0;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    transition: background 0.2s ease;
}

.tooltip-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.tooltip-item.chosen {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.3) 100%);
    border: 1px solid rgba(102, 126, 234, 0.5);
}

.tooltip-token {
    font-family: 'Courier New', monospace;
    font-weight: 600;
    font-size: 0.95em;
    color: #ecf0f1;
    margin-right: 8px;
    flex: 1;
}

.tooltip-prob {
    font-weight: 700;
    color: #3498db;
    font-size: 0.9em;
    margin-left: 8px;
}

.chosen-badge {
    background: #27ae60;
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75em;
    font-weight: 600;
    margin-left: 8px;
}

/* Predictions Section */
.predictions-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid #eee;
}

.predictions-section button {
    margin-bottom: 20px;
}

.predictions-box {
    background: #f8f9fa;
    border: 2px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    min-height: 100px;
    color: #555;
}

.predictions-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.prediction-item {
    background: white;
    border-radius: 8px;
    padding: 12px;
    border: 1px solid #e0e0e0;
    transition: all 0.2s ease;
}

.prediction-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transform: translateX(4px);
}

.prediction-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    gap: 10px;
}

.prediction-rank {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 600;
    min-width: 35px;
    text-align: center;
}

.prediction-token {
    flex: 1;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    color: #333;
    font-size: 1.1em;
}

.prediction-probability {
    color: #667eea;
    font-weight: 700;
    font-size: 1em;
}

.prediction-bar-container {
    width: 100%;
    height: 6px;
    background: #e0e0e0;
    border-radius: 3px;
    overflow: hidden;
}

.prediction-bar {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 3px;
    transition: width 0.5s ease;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .mode-toggle {
        flex-direction: column;
    }
    
    .prediction-header {
        flex-wrap: wrap;
    }
    
    .prediction-token {
        font-size: 0.95em;
    }
    
    /* Mobile tooltip adjustments */
    .token-tooltip {
        min-width: 200px;
        max-width: 280px;
        font-size: 0.9em;
    }
    
    .hoverable-token {
        padding: 3px 5px;
    }
}