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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

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

/* Header */
.header {
    background: white;
    border-radius: 12px;
    padding: 40px 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.header h1 {
    color: #667eea;
    font-size: 2.5em;
    margin-bottom: 10px;
}

.header p {
    color: #666;
    font-size: 1.1em;
}

/* Input Section */
.input-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.form-group label {
    display: block;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 0.95em;
}

.url-input,
.number-input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.url-input:focus,
.number-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    display: block;
    color: #999;
    font-size: 0.9em;
    margin-top: 6px;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 10px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.number-input {
    width: 100%;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-right: 10px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 100%;
    margin-right: 0;
    margin-bottom: 10px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(102, 126, 234, 0.3);
}

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

.btn-secondary {
    background: #f0f0f0;
    color: #333;
    width: 100%;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9em;
    margin-right: 10px;
}

.btn-share {
    background: #000;
    color: #fff;
}

.btn-share:hover {
    background: #333;
}

/* Status Section */
.status-section {
    background: white;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f0f0f0;
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#statusMessage {
    font-size: 1.1em;
    color: #666;
    margin-bottom: 20px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    animation: pulse 2s ease-in-out infinite;
    transition: width 0.1s linear, background 0.4s ease;
}

.progress-fill.near-complete {
    background: linear-gradient(90deg, #f093fb 0%, #f5576c 100%);
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Results Section */
.results-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 20px;
}

.results-header h2 {
    color: #667eea;
    font-size: 1.8em;
}

.result-actions {
    display: flex;
    gap: 10px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid #e0e0e0;
}

.tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1em;
    font-weight: 600;
    color: #999;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn:hover {
    color: #667eea;
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

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

.palette-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 14px;
}

.palette-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border: 2px solid transparent;
    border-radius: 20px;
    background: #f2f2f2;
    cursor: pointer;
    font-size: 0.85em;
    transition: all 0.15s;
}

.palette-btn:hover { background: #e8e8e8; }

.palette-btn.active {
    border-color: #667;
    background: #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

.palette-swatch {
    width: 36px;
    height: 14px;
    border-radius: 7px;
    display: inline-block;
}

#wordcloud {
    width: 100%;
    aspect-ratio: 16 / 9;
    min-height: 480px;
    background: #fafafa;
    border-radius: 8px;
    overflow: hidden;
}

/* White outline so adjacent words don't visually clash (simultaneous
   contrast). paint-order keeps the stroke behind the fill so the gothic
   strokes don't thin out. */
#wordcloud svg text {
    paint-order: stroke fill;
    stroke-linejoin: round;
    /* stroke color & width are set inline by JS (width scales with font size) */
}

#wordcloud svg {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.visualization {
    width: 100%;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fafafa;
    border-radius: 8px;
    position: relative;
}

/* Legend */
.legend {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid #f0f0f0;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #666;
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: inline-block;
}

/* Stats */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.stat-card {
    background: #fafafa;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.stat-card h3 {
    color: #667eea;
    margin-bottom: 10px;
}

.stat-card p {
    color: #666;
    margin: 5px 0;
}

.stat-value {
    font-size: 1.8em;
    font-weight: bold;
    color: #333;
    margin: 10px 0;
}

/* Error Section */
.error-section {
    background: white;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.error-section h2 {
    color: #e74c3c;
    margin-bottom: 20px;
}

.error-section p {
    color: #666;
    margin-bottom: 20px;
    font-size: 1.05em;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    border-radius: 12px;
    padding: 30px;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: #999;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: #333;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .header h1 {
        font-size: 1.8em;
    }

    .header p {
        font-size: 1em;
    }

    .input-section,
    .results-section {
        padding: 20px;
    }

    .options-grid {
        grid-template-columns: 1fr;
    }

    .tabs {
        flex-direction: column;
    }

    .visualization {
        height: 400px;
    }

    .legend {
        flex-direction: column;
        gap: 10px;
    }

    .results-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .result-actions {
        width: 100%;
    }

    .result-actions .btn {
        width: 100%;
        margin-bottom: 10px;
    }
}