/* ===== Tool Pages Styles ===== */

/* Tool Banner */
.tool-banner {
    padding: 8rem 0 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.tool-banner-content {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.tool-icon-large {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    flex-shrink: 0;
}

.tool-banner-text h1 {
    color: white;
    margin-bottom: 0.5rem;
    font-size: 2.25rem;
}

.tool-banner-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin: 0;
}

@media (max-width: 576px) {
    .tool-banner-content {
        flex-direction: column;
        text-align: center;
    }

    .tool-icon-large {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .tool-banner-text h1 {
        font-size: 1.75rem;
    }
}

/* Tool Introduction */
.tool-intro {
    padding: 2rem 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.intro-item {
    text-align: center;
    padding: 1rem;
}

.intro-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.intro-item h4 {
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.intro-item p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}

@media (max-width: 768px) {
    .intro-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .intro-grid {
        grid-template-columns: 1fr;
    }
}

/* Tool Section */
.tool-section {
    padding: 2rem 0 4rem;
}

.tool-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
}

@media (max-width: 992px) {
    .tool-layout {
        grid-template-columns: 1fr;
    }
}

/* Tool Sidebar */
.tool-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Tool Panel */
.tool-panel {
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
}

.tool-panel h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.tool-panel h3 i {
    color: var(--primary-color);
}

/* Control Groups */
.control-group {
    margin-bottom: 1.25rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.control-group input[type="text"],
.control-group input[type="number"],
.control-group select,
.control-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
}

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

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

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.btn-block {
    width: 100%;
}

/* Algorithm Info */
.info-content h4 {
    margin-bottom: 0.5rem;
}

.info-content > p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.complexity-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.complexity-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.complexity-item .label {
    color: var(--text-secondary);
}

.complexity-item .value {
    font-weight: 600;
    color: var(--primary-color);
    font-family: var(--font-mono);
}

/* Visualization Panel */
.visualization-panel {
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h3 {
    margin: 0;
    padding: 0;
    border: none;
}

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

.step-counter span {
    color: var(--primary-color);
    font-weight: 700;
}

.visualization-area {
    flex: 1;
    min-height: 250px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
}

.array-bars {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 4px;
    height: 100%;
    width: 100%;
}

.array-bar {
    width: 40px;
    min-width: 30px;
    background: linear-gradient(180deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 0.5rem;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    position: relative;
}

.array-bar.comparing {
    background: linear-gradient(180deg, var(--warning-color), #d97706);
}

.array-bar.swapping {
    background: linear-gradient(180deg, var(--error-color), #dc2626);
    transform: scale(1.1);
}

.array-bar.sorted {
    background: linear-gradient(180deg, var(--success-color), #059669);
}

.array-bar.pivot {
    background: linear-gradient(180deg, #8b5cf6, #7c3aed);
}

/* Step Controls */
.step-controls {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.step-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

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

.step-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.step-btn.play-btn {
    width: 56px;
    height: 56px;
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.step-btn.play-btn:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: white;
}

.step-btn.play-btn.playing {
    background: var(--warning-color);
    border-color: var(--warning-color);
}

/* Explanation Panel */
.explanation-panel {
    margin-top: 1.5rem;
}

.explanation-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.explanation-text p {
    margin: 0;
    line-height: 1.7;
}

.explanation-text strong {
    color: var(--primary-color);
}

.explanation-highlight {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

/* Path Panel */
.path-panel {
    margin-top: 1.5rem;
}

.path-timeline {
    display: flex;
    overflow-x: auto;
    gap: 0.5rem;
    padding: 1rem 0;
}

.path-item {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.path-item:hover {
    border-color: var(--border-color);
}

.path-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(14, 165, 233, 0.1));
    border-color: var(--primary-color);
}

.path-item.completed {
    background: rgba(16, 185, 129, 0.1);
}

.path-number {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--text-light);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.path-item.active .path-number {
    background: var(--primary-color);
}

.path-item.completed .path-number {
    background: var(--success-color);
}

.path-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Results Panel */
.results-panel {
    margin-top: 1.5rem;
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
}

.results-panel h3 {
    color: white;
    border-color: rgba(255, 255, 255, 0.2);
}

.results-panel h3 i {
    color: white;
}

.results-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.result-stat {
    text-align: center;
}

.result-stat .stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.result-stat .stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

@media (max-width: 576px) {
    .results-content {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
    }

    .result-stat .stat-value {
        font-size: 1.5rem;
    }
}

/* Info Section */
.info-section {
    background: var(--bg-secondary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.info-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.info-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.info-icon.warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.info-card h3 {
    margin-bottom: 1rem;
}

.info-card ol,
.info-card ul {
    padding-left: 1.25rem;
}

.info-card li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    list-style: decimal;
}

.info-card ul li {
    list-style: disc;
}

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

/* Examples Section */
.examples-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.example-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.example-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    font-weight: 600;
    color: white;
}

.example-card.correct .example-header {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.example-card.incorrect .example-header {
    background: linear-gradient(135deg, var(--error-color), #dc2626);
}

.example-content {
    padding: 1.5rem;
}

.example-content h4 {
    margin-bottom: 0.75rem;
}

.example-content p {
    margin-bottom: 1rem;
}

.example-content pre {
    background: #1e1e2e;
    border-radius: var(--radius-md);
    padding: 1rem;
    overflow-x: auto;
}

.example-content code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #cdd6f4;
    white-space: pre;
}

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

/* Related Section */
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.related-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
}

.related-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.related-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(14, 165, 233, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.related-card h4 {
    margin-bottom: 0.5rem;
}

.related-card p {
    font-size: 0.875rem;
    margin: 0;
}

@media (max-width: 768px) {
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .related-grid {
        grid-template-columns: 1fr;
    }
}

/* Tool Main Area - as main container */
main.tool-main {
    padding: 2rem 0 4rem;
}

/* Tool Main Area - as flex child */
.tool-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Tool Controls Panel */
.tool-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-section {
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
}

.control-section h3 {
    font-size: 1rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

/* Tool Visualization Panel */
.tool-visualization {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Visualization Card */
.visualization-card {
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.visualization-card .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.visualization-card .card-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    margin: 0;
}

.visualization-card .card-header h3 i {
    color: var(--primary-color);
}

.visualization-card .card-body {
    padding: 1.5rem;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    color: var(--text-light);
}

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

.empty-state p {
    color: var(--text-secondary);
    margin: 0;
}

/* ===== Category Page Styles ===== */

/* Category Header */
.category-header {
    padding: 8rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.category-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.category-header.code-bg {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
}

.category-header.algo-bg {
    background: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 50%, #14b8a6 100%);
}

.category-header.finance-bg {
    background: linear-gradient(135deg, #10b981 0%, #059669 50%, #047857 100%);
}

.category-header.math-bg {
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 50%, #ef4444 100%);
}

.category-header-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.category-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.category-header h1 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.category-header p {
    color: #fff !important;
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.95;
}

/* Tools Category Grid */
.tools-category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.tool-category-card {
    /* display: flex; */
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.tool-category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.tool-category-icon {
    width: 100%;
    height: 130px;
    padding: 10px ;
    min-width: 120px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
}

.tool-category-icon.finance {
    background: linear-gradient(135deg, #10b981, #059669);
}

.tool-category-icon.math {
    background: linear-gradient(135deg, #f59e0b, #f97316);
}

.tool-category-content {
    padding: 1.5rem;
    flex: 1;
}

.tool-category-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.tool-category-content > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.tool-features {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem 0;
}

.tool-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.tool-features li i {
    color: var(--success-color);
    font-size: 0.75rem;
}

.tool-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.9rem;
}

.tool-category-card:hover .tool-cta {
    color: var(--primary-dark);
}

.tool-cta i {
    transition: transform var(--transition-fast);
}

.tool-category-card:hover .tool-cta i {
    transform: translateX(4px);
}

/* Related Guide Section */
.related-guide-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    margin-bottom: 3rem;
}

.related-guide-section h2 {
    margin-bottom: 0.5rem;
}

.related-guide-section > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.related-guides {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.related-guide-card {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.related-guide-card:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.related-guide-card i {
    color: var(--primary-color);
}

/* Coming Soon Section */
.coming-soon-section {
    margin-bottom: 3rem;
}

.coming-soon-section h2 {
    margin-bottom: 1.5rem;
}

.coming-soon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.coming-soon-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    text-align: center;
    border: 2px dashed var(--border-color);
}

.coming-soon-card i {
    font-size: 2rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.coming-soon-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.coming-soon-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .category-header {
        padding: 6rem 0 3rem;
    }

    .category-header h1 {
        font-size: 2rem;
    }

    .category-icon {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .tools-category-grid {
        grid-template-columns: 1fr;
    }

    .tool-category-card {
        flex-direction: column;
    }

    .tool-category-icon {
        width: 100%;
        height: 100px;
        min-width: auto;
    }
}