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

:root {
    --primary: #667eea;
    --secondary: #764ba2;
    --dark: #1a202c;
    --light: #f7fafc;
    --gray: #718096;
    --border: #e2e8f0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--dark);
}

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

/* Navbar */
.navbar {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.nav-brand h1 {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

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

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid white;
}

.code-example {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    padding: 1.5rem;
}

.code-example pre {
    overflow-x: auto;
}

.code-example code {
    color: #f8f9fa;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
}

/* Features */
.features {
    padding: 5rem 0;
    background: var(--light);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    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-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    color: var(--primary);
}

/* Demo Section */
.demo-section {
    padding: 5rem 0;
}

.demo-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 3rem;
}

.demo-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    overflow: hidden;
}

.demo-iframe {
    width: 100%;
    height: 600px;
    border: none;
}

.demo-note {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--gray);
}

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

/* Docs Section */
.docs-section {
    padding: 5rem 0;
    background: var(--light);
}

.docs-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.doc-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-decoration: none;
    color: var(--dark);
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.doc-card h3 {
    margin-bottom: 0.5rem;
    color: var(--primary);
}

/* Install Section */
.install-section {
    padding: 5rem 0;
}

.install-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.install-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.install-card {
    background: var(--dark);
    color: white;
    padding: 2rem;
    border-radius: 12px;
}

.install-card h3 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.install-card pre {
    background: rgba(0,0,0,0.3);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
}

.install-card code {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.85rem;
}

/* Footer */
.footer {
    background: var(--dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

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

.footer-note {
    margin-top: 0.5rem;
    opacity: 0.7;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .nav-links {
        display: none;
    }

    .feature-grid,
    .docs-grid,
    .install-options {
        grid-template-columns: 1fr;
    }
}

/* Language Toggle */
.lang-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

.lang-toggle-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
}

.lang-toggle-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.lang-flag {
    font-size: 18px;
}

.lang-text {
    font-size: 13px;
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    .lang-toggle {
        bottom: 20px;
        right: 20px;
    }
    
    .lang-toggle-btn {
        padding: 10px 16px;
    }
}

/* Portfolio Banner */
.portfolio-banner {
    background: linear-gradient(135deg, rgba(102,126,234,0.08), rgba(118,75,162,0.08));
    border-top: 3px solid #667eea;
    border-bottom: 3px solid #764ba2;
    padding: 0.9rem 0;
    text-align: center;
    font-size: 0.95rem;
    color: #444;
}

.portfolio-banner a {
    color: #667eea;
    font-weight: 600;
    text-decoration: none;
}

.portfolio-banner a:hover {
    text-decoration: underline;
}