/* Base styles */
:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #2ecc71;
    --secondary-dark: #27ae60;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f9f9f9;
    --white: #ffffff;
    --light-gray: #eeeeee;
    --border-color: #ddd;
    --card-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    --header-height: 80px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
}

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

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 15px;
}

h2 {
    font-size: 32px;
    text-align: center;
    margin: 0 0 30px;
}

p {
    margin-bottom: 20px;
}

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    height: var(--header-height);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.logo img {
    height: 40px;
}

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    font-size: 16px;
}

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

.menu-toggle {
    display: none;
    font-size: 24px;
    color: var(--text-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2c3e50, #3498db);
    color: var(--white);
    text-align: center;
    padding: 120px 0 60px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 15px;
    font-weight: 700;
}

.hero .subtitle {
    font-size: 22px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.search-container {
    max-width: 600px;
    margin: 0 auto 40px;
    display: flex;
    position: relative;
}

#search-input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}

#search-input:focus {
    outline: none;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

#search-button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

#search-button:hover {
    background-color: var(--primary-dark);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.8;
}

/* What is MCP Section */
.what-is-mcp {
    padding: 80px 0;
    background-color: var(--white);
}

.mcp-description {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.mcp-description p {
    font-size: 18px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.mcp-diagram {
    margin-top: 20px;
    max-width: 800px;
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background-color: var(--white);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.feature-card i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* Content Sections */
.content-section {
    padding: 80px 0;
}

.content-section:nth-child(odd) {
    background-color: var(--white);
}

.category-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
    gap: 10px;
}

.category-tab {
    padding: 10px 20px;
    background-color: var(--light-gray);
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.category-tab:hover {
    background-color: #e0e0e0;
}

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

.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
    min-height: 300px;
}

.card {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.card-image {
    height: 160px;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.card-content {
    padding: 20px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.card-description {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-light);
}

.card-category {
    display: inline-block;
    padding: 4px 10px;
    background-color: #e7f5ff;
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 500;
}

.view-more-container {
    text-align: center;
}

.view-more-btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.view-more-btn:hover {
    background-color: var(--primary-dark);
    color: var(--white);
}

.loading-spinner {
    text-align: center;
    width: 100%;
    grid-column: 1 / -1;
    padding: 40px;
    color: var(--text-light);
    font-size: 16px;
}

/* About Section */
.about-section {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    margin-bottom: 20px;
    font-size: 16px;
}

.contribute-box {
    background-color: var(--white);
    border-radius: 10px;
    padding: 30px;
    margin-top: 40px;
    text-align: center;
    box-shadow: var(--card-shadow);
}

.contribute-box h3 {
    margin-bottom: 15px;
}

.contribute-btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--secondary-color);
    color: var(--white);
    border-radius: 50px;
    margin-top: 20px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.contribute-btn:hover {
    background-color: var(--secondary-dark);
    color: var(--white);
}

/* Footer */
.footer {
    background-color: #2c3e50;
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-column p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.9);
}

.footer-bottom a:hover {
    color: var(--white);
}

/* Responsive Styles */
@media (max-width: 992px) {
    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero .subtitle {
        font-size: 18px;
    }

    .hero-stats {
        gap: 30px;
    }

    .stat-number {
        font-size: 36px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 100px 0 50px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

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

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

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 576px) {
    h2 {
        font-size: 28px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero .subtitle {
        font-size: 16px;
    }

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