:root {
    --wcp-primary: #6c63ff;
    --wcp-primary-dark: #5850eb;
    --wcp-primary-light: #8c85ff;
    --wcp-bg-primary: #f8fafc;
    --wcp-bg-secondary: #ffffff;
    --wcp-bg-hover: #f8fafc;
    --wcp-text-primary: #1e293b;
    --wcp-text-secondary: #64748b;
    --wcp-text-muted: #94a3b8;
    --wcp-border: #e2e8f0;
    --wcp-border-light: #f1f5f9;
    --wcp-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --wcp-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --wcp-radius: 8px;
    --wcp-radius-lg: 12px;
    --wcp-transition: all 0.2s ease-in-out;
}

.wcp-container {
    font-family: 'Inter', sans-serif;
    background-color: var(--wcp-bg-primary);
    color: var(--wcp-text-primary);
    line-height: 1.5;
    min-height: 100vh;
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.wcp-header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
}

.wcp-header-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--wcp-primary), var(--wcp-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.wcp-header-subtitle {
    color: var(--wcp-text-secondary);
    font-size: 1rem;
}

/* Main Layout */
.wcp-main-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .wcp-main-layout {
        grid-template-columns: 1fr;
    }
}

/* Text Input Section */
.wcp-text-input-section {
    display: flex;
    flex-direction: column;
}

.wcp-text-input-container {
    background-color: var(--wcp-bg-secondary);
    border-radius: var(--wcp-radius-lg);
    box-shadow: var(--wcp-shadow-sm);
    border: 1px solid var(--wcp-border);
    overflow: hidden;
    flex: 1;
}

.wcp-text-input-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--wcp-border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wcp-text-input-title {
    font-weight: 600;
    color: var(--wcp-text-primary);
}

.wcp-text-count {
    color: var(--wcp-text-muted);
    font-size: 0.875rem;
}

.wcp-text-area {
    width: 100%;
    height: 300px;
    padding: 1.5rem;
    border: none;
    resize: vertical;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--wcp-text-primary);
    background-color: var(--wcp-bg-secondary);
}

.wcp-text-area:focus {
    outline: none;
}

.wcp-text-area::placeholder {
    color: var(--wcp-text-muted);
}

/* Action Buttons */
.wcp-action-buttons {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.wcp-btn {
    padding: 0.625rem 1.25rem;
    border-radius: var(--wcp-radius);
    font-weight: 500;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
    transition: var(--wcp-transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    justify-content: center;
}

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

.wcp-btn-primary:hover {
    background-color: var(--wcp-primary-dark);
}

.wcp-btn-outline {
    background-color: transparent;
    border: 1px solid var(--wcp-border);
    color: var(--wcp-text-secondary);
}

.wcp-btn-outline:hover {
    background-color: var(--wcp-bg-hover);
}

/* Stats Section */
.wcp-stats-section {
    display: flex;
    flex-direction: column;
}

.wcp-section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--wcp-text-primary);
}

.wcp-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    flex: 1;
}

@media (max-width: 640px) {
    .wcp-stats-grid {
        grid-template-columns: 1fr;
    }
}

.wcp-stat-card {
    background-color: var(--wcp-bg-secondary);
    border-radius: var(--wcp-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--wcp-shadow-sm);
    border: 1px solid var(--wcp-border);
    transition: var(--wcp-transition);
}

.wcp-stat-card:hover {
    box-shadow: var(--wcp-shadow);
}

.wcp-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--wcp-primary);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.wcp-stat-label {
    font-size: 0.875rem;
    color: var(--wcp-text-secondary);
    font-weight: 500;
}

/* Keyword Density Section */
.wcp-keyword-section {
    background-color: var(--wcp-bg-secondary);
    border-radius: var(--wcp-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--wcp-shadow-sm);
    border: 1px solid var(--wcp-border);
    margin-top: 2rem;
}

.wcp-keyword-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.wcp-keyword-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.wcp-keyword-filters {
    display: flex;
    gap: 0.5rem;
}

.wcp-filter-btn {
    padding: 0.375rem 0.75rem;
    border-radius: var(--wcp-radius);
    font-size: 0.875rem;
    border: 1px solid var(--wcp-border);
    background-color: transparent;
    color: var(--wcp-text-secondary);
    cursor: pointer;
    transition: var(--wcp-transition);
}

.wcp-filter-btn:hover,
.wcp-filter-btn.wcp-filter-btn-active {
    background-color: var(--wcp-primary);
    color: white;
    border-color: var(--wcp-primary);
}

.wcp-keyword-table {
    width: 100%;
    border-collapse: collapse;
}

.wcp-keyword-table th {
    text-align: left;
    padding: 0.75rem;
    font-weight: 600;
    color: var(--wcp-text-secondary);
    border-bottom: 1px solid var(--wcp-border);
    font-size: 0.875rem;
}

.wcp-keyword-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--wcp-border-light);
    color: var(--wcp-text-primary);
}

.wcp-keyword-table tr:last-child td {
    border-bottom: none;
}

.wcp-keyword-table tr:hover {
    background-color: var(--wcp-bg-hover);
}

.wcp-keyword-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--wcp-primary);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
}

.wcp-density-percentage {
    font-weight: 600;
    color: var(--wcp-primary);
}

/* Empty State */
.wcp-empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--wcp-text-muted);
}

.wcp-empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 480px) {
    .wcp-keyword-filters {
        flex-wrap: wrap;
    }
    
    .wcp-action-buttons {
        flex-direction: column;
    }
    
    .wcp-btn {
        width: 100%;
    }
}