* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --primary: #4f46e5;
    --primary-light: #6366f1;
    --background: #f9fafb;
    --dark-text: #111827;
    --light-text: #6b7280;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --transition: all 0.3s ease;
}
body {
    font-family: 'Inter', sans-serif;
    color: var(--dark-text);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
section {
    padding: 80px 0;
}
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}
.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
    text-align: center;
}
.section-subtitle {
    font-size: 1.125rem;
    color: var(--light-text);
    text-align: center;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}
.navbar.scrolled {
    box-shadow: var(--shadow);
    border-bottom-color: var(--border-color);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}
.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}
.logo:hover {
    color: var(--primary-light);
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}
.nav-link {
    text-decoration: none;
    color: var(--dark-text);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 4px 0;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
    border-radius: 2px;
}
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-text);
    cursor: pointer;
    padding: 8px;
}
.hero {
    padding-top: 140px;
    background: linear-gradient(135deg, #f0f4ff 0%, #f9fafb 100%);
    position: relative;
    overflow: hidden;
}
.hero::before {
    color: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%234F46E5' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.5;
    z-index: -1;
}
.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 40px 0;
}
.hero-title {
    font-size: 3.5rem;
    margin-bottom: 24px;
    color: var(--dark-text);
}
.hero-subtitle {
    font-size: 1.25rem;
    color: var(--light-text);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}
.btn-primary {
    background-color: var(--primary);
    color: white;
}
.btn-primary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.btn-secondary:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}
.categories {
    background-color: white;
}
.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 32px;
}
.filter-btn {
    padding: 10px 20px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background-color: white;
    color: var(--dark-text);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.filter-btn.active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}
.search-container {
    max-width: 500px;
    margin: 0 auto 48px;
}
.serch-box {
    position: relative;
}
.serch-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-text);
}
#search-input {
    width: 100%;
    padding: 16px 16px 16px 48px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    font-size: 1rem;
    transition: var(--transition);
}
#search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.category-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}

.category-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background-color: rgba(79, 70, 229, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
    font-size: 1.5rem;
}

.category-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.category-desc {
    color: var(--light-text);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Tools Sections */
.tools-section {
    background-color: var(--background);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 32px;
}

.tool-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}

.tool-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.tool-logo {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background-color: rgba(79, 70, 229, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 16px;
    color: var(--primary);
    font-size: 1.25rem;
    font-weight: 700;
}

.tool-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.tool-category {
    display: inline-block;
    padding: 4px 12px;
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 16px;
    align-self: flex-start;
}

.tool-desc {
    color: var(--light-text);
    margin-bottom: 24px;
    flex-grow: 1;
}

.tool-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tool-price {
    font-weight: 600;
    color: var(--dark-text);
}

.tool-price.free {
    color: #10B981;
}

.tool-price.paid {
    color: #EF4444;
}

/* Footer */
.footer {
    background-color: white;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.footer-text {
    color: var(--light-text);
    line-height: 1.6;
}

.footer-heading {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--dark-text);
}

.footer-nav {
    list-style: none;
}

.footer-nav li {
    margin-bottom: 12px;
}

.footer-nav a {
    text-decoration: none;
    color: var(--light-text);
    transition: var(--transition);
}

.footer-nav a:hover {
    color: var(--primary);
}

.social-icons {
    display: flex;
    gap: 16px;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--background);
    color: var(--dark-text);
    transition: var(--transition);
    text-decoration: none;
}

.social-icons a:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--light-text);
    font-size: 0.875rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.75rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        z-index: 999;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .filter-buttons {
        gap: 8px;
    }
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.875rem;
    }
}

@media (max-width: 576px) {
        .hero-title {
            font-size: 1.875rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .categories-grid,
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}