:root {
    --bg-color: #0a0a0a;
    --terminal-bg: #1a1a1a;
    --text-color: #00ff00;
    --text-secondary: #888;
    --accent-color: #00ccff;
    --border-color: #333;
    --code-bg: #111;
    --selection-bg: #333;
}

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

body {
    font-family: 'Courier New', Monaco, 'Cascadia Code', 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    /* Performance optimizations */
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--selection-bg);
    color: var(--text-color);
}

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

/* Terminal Window */
.terminal-window {
    background: var(--terminal-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    margin: 20px 0;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.1);
}

.terminal-header {
    background: var(--border-color);
    padding: 10px 15px;
    border-radius: 6px 6px 0 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
}

.btn-close { background: #ff5f56; }
.btn-minimize { background: #ffbd2e; }
.btn-maximize { background: #27ca3f; }

.terminal-title {
    margin-left: 10px;
    color: var(--text-secondary);
    font-size: 14px;
}

.terminal-content {
    padding: 20px;
    min-height: 200px;
}

/* Header */
.header {
    text-align: center;
    padding: 40px 0;
}

.logo {
    font-size: 3rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 10px;
    text-shadow: 0 0 10px rgba(0, 204, 255, 0.5);
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.typing-animation {
    border-right: 2px solid var(--text-color);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { border-color: var(--text-color); }
    51%, 100% { border-color: transparent; }
}

/* Navigation */
.nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.3s ease;
    background: var(--terminal-bg);
}

.nav-link:hover {
    background: var(--accent-color);
    color: var(--bg-color);
    box-shadow: 0 0 10px rgba(0, 204, 255, 0.3);
}

/* Sections */
.section {
    margin: 60px 0;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.feature-card {
    background: var(--terminal-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 20px;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 255, 0, 0.1);
}

.feature-title {
    color: var(--accent-color);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

/* Code blocks */
.code-block {
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 20px;
    overflow-x: auto;
    margin: 20px 0;
    position: relative;
}

.code-block::before {
    content: attr(data-lang);
    position: absolute;
    top: -1px;
    right: -1px;
    background: var(--accent-color);
    color: var(--bg-color);
    padding: 4px 8px;
    font-size: 12px;
    border-radius: 0 4px 0 4px;
}

.code-block pre {
    margin: 0;
    color: var(--text-color);
}

.prompt {
    color: var(--accent-color);
}

.comment {
    color: var(--text-secondary);
}

/* Logo positioning */
.logo-top {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
}

.logo-top img {
    max-height: 50px;
}

/* Language selector */
.lang-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.lang-btn {
    background: var(--terminal-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 12px;
    margin: 0 2px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn.active {
    background: var(--accent-color);
    color: var(--bg-color);
}

.lang-btn:hover {
    background: var(--accent-color);
    color: var(--bg-color);
}

/* Footer */
.footer {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    margin-top: 60px;
    color: var(--text-secondary);
}

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

.footer a:hover {
    text-decoration: underline;
}

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

    .nav {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

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

    .lang-selector {
        position: relative;
        top: auto;
        right: auto;
        text-align: center;
        margin: 20px 0;
    }
}

/* Hide content by default */
.lang-content {
    display: none;
}

.lang-content.active {
    display: block;
}

/* Installation command animation */
.install-cmd {
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 15px;
    margin: 20px 0;
    font-family: inherit;
}