/* Text Statistics Tool Styles */

:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --accent-color: #059669;
    --success-color: #10b981;
    --success-light: #dcfce7;
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    --error-color: #ef4444;
    --error-light: #fee2e2;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px 0 rgb(0 0 0 / 0.1);
    --shadow-medium: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-heavy: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header .icon {
    font-size: 3.5rem;
}

header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* Input Section */
.input-section {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

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

.input-header h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.input-tools {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tool-btn {
    padding: 0.5rem 1rem;
    background: var(--background-color);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.tool-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.input-area {
    position: relative;
}

#text-input {
    width: 100%;
    min-height: 200px;
    padding: 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: 'Consolas', 'Monaco', monospace;
    resize: vertical;
    transition: var(--transition);
    line-height: 1.6;
}

#text-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.input-footer {
    margin-top: 0.5rem;
    text-align: right;
}

.live-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Quick Stats */
.quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    animation: countUp 0.6s ease;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Detailed Statistics */
.detailed-stats {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.detailed-stats h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.stats-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.stats-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--background-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-item span:first-child {
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-item span:last-child {
    color: var(--text-primary);
    font-weight: 700;
}

/* Word Frequency */
.word-frequency {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.word-frequency h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.frequency-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    align-items: end;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.control-group input[type="number"] {
    width: 120px;
    padding: 0.5rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.control-group input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.control-group label input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    accent-color: var(--primary-color);
}

.primary-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.primary-btn:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.frequency-results {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.frequency-chart {
    background: var(--background-color);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    min-height: 300px;
}

.frequency-table {
    background: var(--background-color);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    max-height: 300px;
    overflow-y: auto;
}

.frequency-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.frequency-item:last-child {
    border-bottom: none;
}

.frequency-word {
    font-weight: 600;
    color: var(--text-primary);
}

.frequency-count {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.frequency-bar {
    flex: 1;
    margin: 0 1rem;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.frequency-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.5s ease;
}

/* Character Distribution */
.char-distribution {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.char-distribution h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.distribution-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.dist-tab {
    padding: 0.75rem 1.5rem;
    background: var(--background-color);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.dist-tab:hover {
    color: var(--text-primary);
}

.dist-tab.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.distribution-content {
    background: var(--background-color);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    min-height: 200px;
}

.char-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 0.5rem;
}

.char-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    text-align: center;
    transition: var(--transition);
}

.char-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.char-symbol {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.char-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* SEO Analysis */
.seo-analysis {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.seo-analysis h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.seo-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    align-items: end;
}

.seo-controls input[type="text"] {
    width: 250px;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 1rem;
}

.seo-controls input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.seo-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.seo-metric {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: var(--transition);
}

.seo-metric:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.metric-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.metric-status {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-status.good {
    background: var(--success-light);
    color: var(--success-color);
}

.metric-status.warning {
    background: var(--warning-light);
    color: var(--warning-color);
}

.metric-status.poor {
    background: var(--error-light);
    color: var(--error-color);
}

.seo-recommendations {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.seo-recommendations h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.seo-recommendations ul {
    list-style: none;
    padding: 0;
}

.seo-recommendations li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.seo-recommendations li:last-child {
    border-bottom: none;
}

.seo-recommendations li::before {
    content: '💡';
    flex-shrink: 0;
}

.keyword-analysis {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.keyword-analysis h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.keyword-positions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.keyword-position {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.position-text {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.position-info {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.position-text mark {
    background: var(--warning-light);
    color: var(--warning-color);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-weight: 600;
}

.keyword-positions-list {
    margin-top: 0.5rem;
}

.position-number {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
    display: block;
}

/* Export Section */
.export-section {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.export-section h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.export-options {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.export-btn {
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.export-btn:hover {
    background: #047857;
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.export-preview {
    background: var(--background-color);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--border-color);
}

#export-text {
    width: 100%;
    height: 200px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    resize: none;
}

#export-text:focus {
    outline: none;
}

/* Tips Section */
.tips-section {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.tips-section h3 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.tip-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.tip-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.tip-content h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 1rem;
}

.tip-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.5s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 2.5rem;
        flex-direction: column;
        gap: 0.5rem;
    }

    .input-header {
        flex-direction: column;
        align-items: stretch;
    }

    .input-tools {
        justify-content: center;
    }

    .quick-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .frequency-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .frequency-results {
        grid-template-columns: 1fr;
    }

    .distribution-tabs {
        justify-content: center;
    }

    .export-options {
        flex-direction: column;
    }

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

    .tip-item {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }

    .input-section, .detailed-stats, .word-frequency, .char-distribution, .export-section, .tips-section {
        padding: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .quick-stats {
        grid-template-columns: 1fr;
    }

    .control-group input[type="number"] {
        width: 100%;
    }

    .char-grid {
        grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    }
}