:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --dark-color: #333;
    --light-color: #f4f4f4;
    --danger-color: #ea4335;
    --success-color: #34a853;
    --max-width: 1200px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fff;
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.8rem;
    color: #000;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #4285f4 0%, #34a853 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

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

.hero-image {
    margin-top: 30px;
}

.hero-image .screenshot {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-height: 400px;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 600;
    margin-right: 10px;
    transition: all 0.3s;
}

.btn:hover {
    background: #3367d6;
    transform: translateY(-2px);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
}

.btn-secondary:hover {
    background: #f4f4f4;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.section-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    color: #666;
}

/* Features Section */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

/* Installation Section */
.installation {
    background-color: var(--light-color);
}

.tabs {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.tab-header {
    display: flex;
    flex-wrap: wrap;
    background: #f8f8f8;
    border-bottom: 1px solid #eee;
}

.tab-btn {
    padding: 15px 20px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

.tab-btn:hover {
    background: #f0f0f0;
}

.tab-btn.active {
    background: white;
    border-bottom: 3px solid var(--primary-color);
    color: var(--primary-color);
}

.tab-content {
    padding: 30px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.tab-pane h3 {
    margin-bottom: 20px;
    color: var(--dark-color);
}

.code-block {
    background: #2d2d2d;
    border-radius: 5px;
    padding: 20px;
    margin: 20px 0;
    position: relative;
}

.code-block.wide {
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
    color: #f8f8f8;
    font-family: 'Courier New', Courier, monospace;
    overflow-x: auto;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: none;
    border-radius: 3px;
    padding: 5px 10px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.3s;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Usage Section */
.usage-content {
    max-width: 900px;
    margin: 0 auto;
}

.usage-content h3 {
    margin-bottom: 20px;
}

/* Contribute Section */
.contribute-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.contribute-card {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s;
}

.contribute-card:hover {
    transform: translateY(-5px);
}

.contribute-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

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

/* Screenshots Section */
.screenshots {
    background-color: var(--light-color);
}

.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.screenshot-item {
    background: white;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: transform 0.3s;
}

.screenshot-item:hover {
    transform: translateY(-5px);
}

.gallery-img {
    width: 100%;
    height: auto;
    border-bottom: 1px solid #eee;
}

.screenshot-item p {
    padding: 15px;
    text-align: center;
    font-weight: 500;
}

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

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

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer-logo-img {
    height: 40px;
    margin-right: 10px;
}

.footer-logo h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.footer-logo-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.footer-logo-header h3 {
    margin-bottom: 0;
    line-height: 1;
}

.footer-links h4, .footer-license h4 {
    margin-bottom: 15px;
    color: #ccc;
}

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

.footer-links ul li a {
    color: #aaa;
    transition: color 0.3s;
}

.footer-links ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #aaa;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 10px;
    }
    
    .hero {
        padding: 150px 0 80px;
    }
    
    .tab-header {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
        text-align: center;
    }
    
    .screenshot-gallery {
        grid-template-columns: 1fr;
    }
}