:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --accent-color: #58a6ff;
    --secondary-bg: #161b22;
    --card-bg: #21262d;
    --border-color: #30363d;
    --code-bg: #000000;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Language toggling */
body.lang-en .ja { display: none; }
body.lang-ja .en { display: none; }

/* Navigation */
nav {
    background-color: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 15px 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.3s;
}

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

#toggle-lang {
    background: none;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    margin-left: 20px;
    font-family: inherit;
}

#toggle-lang:hover {
    background-color: var(--accent-color);
    color: #fff;
}

/* Hero */
.hero {
    padding: 80px 0;
    text-align: center;
    background: radial-gradient(circle at center, #1e293b 0%, #0d1117 70%);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #fff;
}

.subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #8b949e;
}

.badges {
    margin-bottom: 40px;
}

.badges img {
    margin: 0 5px;
}

.hero-image {
    max-width: 800px;
    margin: 0 auto 40px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    border: 1px solid var(--border-color);
}

.hero-image img {
    width: 100%;
    display: block;
}

.cta code {
    background-color: var(--code-bg);
    padding: 15px 30px;
    border-radius: 8px;
    font-family: 'Fira Code', monospace;
    font-size: 1.2rem;
    border: 1px solid var(--accent-color);
    display: inline-block;
}

/* Features */
section {
    padding: 80px 0;
}

h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
    color: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
}

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

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--accent-color);
}

/* Install */
.install-steps {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--secondary-bg);
    padding: 40px;
    border-radius: 12px;
}

.install-steps p {
    margin-bottom: 15px;
}

pre {
    background-color: var(--code-bg);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

code {
    font-family: 'Fira Code', monospace;
}

/* Docs */
.docs-list {
    list-style: none;
    text-align: center;
}

.docs-list li {
    margin-bottom: 15px;
}

.docs-list a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
}

.docs-list a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: #8b949e;
    font-size: 0.9rem;
}

footer a {
    color: #8b949e;
    text-decoration: none;
}

footer a:hover {
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
}