.tools-page {
    padding: var(--space-16) 0;
    min-height: calc(100vh - 72px);
    background: var(--bg-primary);
    transition: all var(--transition-normal);
}

.page-header {
    text-align: center;
    margin-bottom: var(--space-16);
    position: relative;
}

.page-title {
    font-size: 42px;
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-5);
    line-height: var(--line-height-tight);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-description {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

.category-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-12);
    justify-content: center;
    padding: var(--space-2);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xs);
}

.category-tab {
    background: transparent;
    border: 1px solid transparent;
    padding: var(--space-3) var(--space-6);
    font-size: 16px;
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
    border-radius: var(--radius-lg);
    min-width: 120px;
}

.category-tab:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.category-tab.active {
    color: var(--primary);
    background: var(--card-bg);
    border: 1px solid var(--primary);
    box-shadow: var(--shadow-sm);
}

.category-tab.active::after {
    display: none;
}

.tools-category {
    margin-bottom: var(--space-16);
}

.category-title {
    font-size: 24px;
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-6);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: var(--shadow-xs);
    position: relative;
    overflow: hidden;
    group: hover;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--info) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

.tool-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.tool-card:hover::before {
    opacity: 0.02;
}

.tool-card > * {
    position: relative;
    z-index: 1;
}

.tool-icon {
    width: 88px;
    height: 88px;
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
    background: var(--bg-tertiary);
    border: 1px solid var(--card-border);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-xs);
}

.tool-icon svg {
    width: 44px;
    height: 44px;
    color: var(--primary);
    transition: all var(--transition-fast);
}

/* Modern flat icon colors for PDF Tools */
[data-category="pdf"] .tool-card:nth-child(1) .tool-icon {
    background: var(--primary-50);
    border-color: rgba(99, 102, 241, 0.2);
}

[data-category="pdf"] .tool-card:nth-child(1) .tool-icon svg {
    color: var(--primary);
}

[data-category="pdf"] .tool-card:nth-child(2) .tool-icon {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

[data-category="pdf"] .tool-card:nth-child(2) .tool-icon svg {
    color: var(--success);
}

[data-category="pdf"] .tool-card:nth-child(3) .tool-icon {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
}

[data-category="pdf"] .tool-card:nth-child(3) .tool-icon svg {
    color: var(--info);
}

[data-category="pdf"] .tool-card:nth-child(4) .tool-icon {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.2);
}

[data-category="pdf"] .tool-card:nth-child(4) .tool-icon svg {
    color: var(--warning);
}

[data-category="pdf"] .tool-card:nth-child(5) .tool-icon {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
}

[data-category="pdf"] .tool-card:nth-child(5) .tool-icon svg {
    color: var(--error);
}

[data-category="pdf"] .tool-card:nth-child(6) .tool-icon {
    background: var(--primary-50);
    border-color: rgba(99, 102, 241, 0.2);
}

[data-category="pdf"] .tool-card:nth-child(6) .tool-icon svg {
    color: var(--primary);
}

/* Modern flat icon colors for Security Tools */
[data-category="security"] .tool-card:nth-child(1) .tool-icon,
[data-category="all"] .tool-card[data-category="security"] .tool-icon {
    background: var(--primary-50);
    border-color: rgba(99, 102, 241, 0.2);
}

[data-category="security"] .tool-card:nth-child(1) .tool-icon svg,
[data-category="all"] .tool-card[data-category="security"] .tool-icon svg {
    color: var(--primary);
}

/* Modern flat icon colors for Generation Tools */
[data-category="generation"] .tool-card:nth-child(1) .tool-icon,
[data-category="all"] .tool-card[data-category="generation"] .tool-icon {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

[data-category="generation"] .tool-card:nth-child(1) .tool-icon svg,
[data-category="all"] .tool-card[data-category="generation"] .tool-icon svg {
    color: var(--success);
}

/* Modern flat icon colors for Data Tools */
[data-category="data"] .tool-card:nth-child(1) .tool-icon,
[data-category="all"] .tool-card[data-category="data"] .tool-icon {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
}

[data-category="data"] .tool-card:nth-child(1) .tool-icon svg,
[data-category="all"] .tool-card[data-category="data"] .tool-icon svg {
    color: var(--info);
}


/* Modern flat icon colors for Unit Converter Tools */
[data-category="unit"] .tool-card:nth-child(1) .tool-icon {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.2);
}

[data-category="unit"] .tool-card:nth-child(1) .tool-icon svg {
    color: var(--warning);
}

[data-category="unit"] .tool-card:nth-child(2) .tool-icon {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
}

[data-category="unit"] .tool-card:nth-child(2) .tool-icon svg {
    color: var(--error);
}

[data-category="unit"] .tool-card:nth-child(3) .tool-icon {
    background: var(--primary-50);
    border-color: rgba(99, 102, 241, 0.2);
}

[data-category="unit"] .tool-card:nth-child(3) .tool-icon svg {
    color: var(--primary);
}

.tool-card:hover .tool-icon {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-md);
    background: var(--card-bg);
}

.tool-card:hover .tool-icon svg {
    transform: scale(1.1);
}

.tool-name {
    font-size: 18px;
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.tool-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gray-100);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--gray-600);
}

.user-avatar:hover {
    background: var(--gray-200);
    color: var(--text-primary);
}

/* SEO Content Sections for Tools Page */
.tools-features-section {
    padding: var(--space-20) 0;
    background: var(--bg-secondary);
    transition: all var(--transition-normal);
}

.tools-features-section .section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: var(--space-12);
}

.tools-features-section .section-title {
    font-size: 32px;
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.tools-features-section .section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

.tools-features-section .features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.tools-features-section .feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    text-align: center;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-xs);
    position: relative;
    overflow: hidden;
}

.tools-features-section .feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--success) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

.tools-features-section .feature-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.tools-features-section .feature-card:hover::before {
    opacity: 0.02;
}

.tools-features-section .feature-card > * {
    position: relative;
    z-index: 1;
}

.tools-features-section .feature-icon {
    width: 88px;
    height: 88px;
    margin: 0 auto var(--space-6);
    background: var(--primary-50);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.tools-features-section .feature-card:hover .feature-icon {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
    background: var(--card-bg);
}

.tools-features-section .feature-title {
    font-size: 20px;
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.tools-features-section .feature-description {
    font-size: 14px;
    line-height: var(--line-height-relaxed);
    color: var(--text-secondary);
}

.tools-benefits-section {
    padding: var(--space-20) 0;
    background: var(--bg-primary);
    transition: all var(--transition-normal);
}

.tools-benefits-section .section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: var(--space-12);
}

.tools-benefits-section .section-title {
    font-size: 32px;
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.tools-benefits-section .section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

.tools-faq-section {
    padding: var(--space-20) 0;
    background: var(--bg-secondary);
    transition: all var(--transition-normal);
}

.tools-faq-section .section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: var(--space-12);
}

.tools-faq-section .section-title {
    font-size: 32px;
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.tools-faq-section .section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

.tools-faq-section .faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.tools-faq-section .faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-xs);
    position: relative;
    overflow: hidden;
}

.tools-faq-section .faq-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--info) 0%, var(--primary) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

.tools-faq-section .faq-item:hover {
    border-color: var(--info);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.tools-faq-section .faq-item:hover::before {
    opacity: 0.02;
}

.tools-faq-section .faq-item > * {
    position: relative;
    z-index: 1;
}

.tools-faq-section .faq-question {
    font-size: 16px;
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.tools-faq-section .faq-answer {
    font-size: 14px;
    line-height: var(--line-height-relaxed);
    color: var(--text-secondary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.benefit-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-xs);
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--warning) 0%, var(--success) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

.benefit-card:hover {
    border-color: var(--warning);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.benefit-card:hover::before {
    opacity: 0.02;
}

.benefit-card > * {
    position: relative;
    z-index: 1;
}

.benefit-icon {
    width: 68px;
    height: 68px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    color: var(--warning);
    box-shadow: var(--shadow-xs);
    transition: all var(--transition-normal);
}

.benefit-card:hover .benefit-icon {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
    background: var(--card-bg);
}

.benefit-title {
    font-size: 18px;
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.benefit-description {
    font-size: 14px;
    line-height: var(--line-height-relaxed);
    color: var(--text-secondary);
}

@media (max-width: 1024px) {
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-features-section .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-faq-section .faq-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-features-section .features-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-faq-section .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .category-tabs {
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    .category-tabs::-webkit-scrollbar {
        display: none;
    }
    
    .page-title {
        font-size: 28px;
    }
    
    .page-description {
        font-size: 16px;
    }
}