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

:root {
    --primary: #4285f4;
    --primary-dark: #1a73e8;
    --success: #34a853;
    --warning: #fbbc04;
    --danger: #ea4335;
    --bg: #f8f9fa;
    --card-bg: #ffffff;
    --text: #202124;
    --text-light: #5f6368;
    --border: #dadce0;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    padding: 20px;
}

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

.header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px 0;
}

.header h1 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
}

.main-content {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.card h2 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text);
    font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group small {
    display: block;
    margin-top: 4px;
    color: var(--text-light);
    font-size: 0.85rem;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 8px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: normal;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.btn-primary, .btn-secondary {
    width: 100%;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
}

.btn-secondary {
    background: var(--text-light);
    color: white;
    width: auto;
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background: var(--text);
}

.results-section {
    min-height: 600px;
}

.tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border);
}

.tab {
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

.tab:hover {
    color: var(--primary);
    background: rgba(66, 133, 244, 0.05);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
}

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

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.results-header h3 {
    font-size: 1.2rem;
    color: var(--text);
}

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

.match-type-section {
    margin-bottom: 30px;
}

.match-type-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--bg);
    border-radius: 6px;
    margin-bottom: 10px;
    cursor: pointer;
}

.match-type-header h4 {
    font-size: 1.1rem;
    color: var(--primary);
}

.keyword-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 8px;
    max-height: 400px;
    overflow-y: auto;
    padding: 10px;
    background: var(--bg);
    border-radius: 6px;
}

.keyword-item {
    padding: 10px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.keyword-item:hover {
    background: var(--primary);
    color: white;
    transform: translateX(5px);
}

.keyword-item .copy-icon {
    opacity: 0;
    transition: opacity 0.2s;
}

.keyword-item:hover .copy-icon {
    opacity: 1;
}

.intent-analysis {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.intent-card {
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid;
}

.intent-card.informational {
    background: #e3f2fd;
    border-color: #2196f3;
}

.intent-card.navigational {
    background: #f3e5f5;
    border-color: #9c27b0;
}

.intent-card.transactional {
    background: #e8f5e9;
    border-color: #4caf50;
}

.intent-card.commercial {
    background: #fff3e0;
    border-color: #ff9800;
}

.intent-card h4 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.intent-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 10px;
}

.intent-keyword {
    padding: 4px 8px;
    background: white;
    border-radius: 4px;
    font-size: 0.85rem;
    border: 1px solid var(--border);
}

.analysis-chart {
    margin-bottom: 30px;
    height: 300px;
}

.keyword-scores {
    display: grid;
    gap: 10px;
}

.score-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--bg);
    border-radius: 6px;
}

.score-item .keyword {
    font-weight: 500;
    flex: 1;
}

.score-item .score {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 15px;
}

.score-item .score-bar {
    flex: 2;
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.score-item .score-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--danger), var(--warning), var(--success));
    transition: width 0.3s;
}

.keyword-groups {
    display: grid;
    gap: 20px;
}

.keyword-group {
    padding: 20px;
    background: var(--bg);
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

.keyword-group h4 {
    margin-bottom: 15px;
    color: var(--primary);
}

.group-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.group-keyword {
    padding: 6px 12px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.9rem;
}

.placeholder {
    text-align: center;
    color: var(--text-light);
    padding: 40px;
    font-style: italic;
}

.advanced-options {
    display: grid;
    gap: 15px;
}

.advanced-options .form-group {
    margin-bottom: 0;
}

.advanced-options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.advanced-options input[type="checkbox"] {
    width: auto;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .keyword-list {
        grid-template-columns: 1fr;
    }
}

/* Scrollbar styling */
.keyword-list::-webkit-scrollbar {
    width: 8px;
}

.keyword-list::-webkit-scrollbar-track {
    background: var(--bg);
}

.keyword-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.keyword-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}