:root {
    --primary-color: #2563eb;
    /* Blue for accents */
    --text-color: #1f2937;
    /* Dark gray for text */
    --text-light: #6b7280;
    /* Lighter gray for secondary text */
    --bg-color: #ffffff;
    /* White background */
    --bg-secondary: #f9fafb;
    /* Very light gray for sections */
    --border-color: #e5e7eb;
    /* Light border */
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --card-hover-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-secondary);
    color: var(--text-color);
    line-height: 1.6;
}

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

/* Navbar */
.navbar {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    color: var(--primary-color);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero Section */
.hero {
    background-color: var(--bg-color);
    padding: 4rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.hero p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Search & Filter */
.search-container {
    position: relative;
    max-width: 500px;
    margin: 0 auto 2rem;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

#searchInput {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: var(--font-family);
}

#searchInput:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.categories {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.category-btn {
    background-color: white;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: 500;
    color: var(--text-light);
    transition: all 0.2s;
}

.category-btn:hover {
    border-color: var(--text-light);
    color: var(--text-color);
}

.category-btn.active {
    background-color: var(--text-color);
    color: white;
    border-color: var(--text-color);
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 4rem 0;
}

.tool-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
}

.tool-image-container {
    height: 180px;
    background-color: #ffffff;
    /* White background for logos */
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
    padding: 20px;
    /* Add padding so logos don't touch edges */
}

.tool-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* Keep aspect ratio of logos */
    transition: transform 0.3s ease;
}

.tool-card:hover .tool-image {
    transform: scale(1.05);
}

.tool-placeholder-icon {
    font-size: 3rem;
    color: #d1d5db;
}

.tool-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.tool-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
}

.tool-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.tool-description {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tool-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    margin-top: auto;
}

.visit-btn {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.visit-btn:hover {
    text-decoration: underline;
}

.no-results {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-light);
    font-size: 1.2rem;
}

.hidden {
    display: none;
}

/* Footer */
.footer {
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-light);
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

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