:root {
    --neon-blue-dark: #069ec4;
    --neon-blue: #1ad1ff;
    --neon-green-accent: #1affb3;
    --light-bg: #ffffff;
    --light-panel-bg: #f9f9f9;
    --dark-header-bg: #2b3b4a;
    --dark-code-bg: #101522;
    --dark-text: #333333;
    --light-text: #f0f0f0;
    --muted-text: #666666;
    --button-text-dark: #101522;
}

*,
*::before,
*::after {
    /* Reset CSS cơ bản để đảm bảo tính nhất quán trên các trình duyệt */
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Source Sans Pro', 'Segoe UI', Arial, sans-serif;
    margin: 0;
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background: var(--dark-header-bg);
    z-index: 100;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 20px;
}

.header-container {
    max-width: none;
    margin: 0;
    padding: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    width: 32px;
    height: 32px;
}

.logo a {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--light-text);
    text-decoration: none;
    text-shadow: 0 0 5px var(--neon-blue);
}

.logo span {
    color: var(--neon-blue);
    text-shadow: 0 0 8px var(--neon-blue);
}

nav a {
    color: var(--light-text);
    text-decoration: none;
    margin-left: 25px;
    font-size: 1.1rem;
    transition: color 0.2s, text-shadow 0.2s;
}

nav a:hover {
    color: var(--neon-blue);
    text-shadow: 0 0 5px var(--neon-blue);
}

.hero {
    text-align: center;
    padding: 4rem 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    font-weight: 300;
}

.hero p {
    font-size: 1.3rem;
    color: var(--muted-text);
    margin-bottom: 2.5rem;
}

.code-window {
    background-color: var(--dark-code-bg);
    border: 1px solid var(--neon-blue);
    border-radius: 8px;
    text-align: left;
    box-shadow: 0 0 10px var(--neon-blue);
    max-width: 700px;
    margin: 0 auto;
}

.code-header {
    background-color: #181c2f;
    padding: 8px 15px;
    border-bottom: 1px solid var(--neon-blue);
    border-radius: 8px 8px 0 0;
    font-family: 'Fira Mono', monospace;
    color: var(--neon-blue);
}

.code-body {
    padding: 1.5rem;
    overflow-x: auto;
}

pre {
    margin: 0;
    background: none;
    padding: 0;
    font-family: 'Fira Mono', 'Consolas', monospace;
}

.cta-buttons {
    margin-top: 3rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    text-decoration: none;
    color: var(--button-text-dark);
    font-weight: bold;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    transition: all 0.2s ease-in-out;
    font-size: 1.1rem;
    border: none;
}

.btn-primary {
    background: var(--neon-blue);
    box-shadow: 0 0 10px var(--neon-blue);
}

.btn-primary:hover {
    box-shadow: 0 0 20px var(--neon-blue);
    transform: translateY(-2px);
}


.features {
    padding: 4rem 0;
    background-color: var(--light-panel-bg);
    border-top: 1px solid #eee;
}

.features h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 2.5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-item {
    padding: 1.5rem;
}

.feature-item h3 {
    color: var(--neon-blue-dark);
    text-shadow: 0 0 3px var(--neon-blue-dark);
    margin-top: 0;
}

footer {
    background-color: var(--dark-header-bg);
    color: #ccc;
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9rem;
}

footer a {
    color: var(--neon-blue);
    text-shadow: 0 0 3px var(--neon-blue);
}

.highlight-Zerionyx .zyx-keyword,
.highlight-Zerionyx .zyx-types {
    color: var(--neon-blue);
    font-weight: bold;
}

.highlight-Zerionyx .zyx-func-def,
.highlight-Zerionyx .zyx-func {
    color: var(--neon-green-accent);
    font-weight: bold;
}

.highlight-Zerionyx .zyx-string {
    color: #e2fb8c;
}

.highlight-Zerionyx .zyx-number {
    color: #ffb366;
}

.highlight-Zerionyx .zyx-comment {
    color: #667788;
    font-style: italic;
}

.highlight-Zerionyx .zyx-var {
    color: #e6faff;
}

.nav-toggle {
    display: none;
    font-size: 1.8rem;
    color: var(--light-text);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
        justify-content: center;
        padding: 0.8rem 15px;
    }

    nav {
        width: 100%;
        margin-top: 1rem;
        display: none;
        flex-direction: column;
        text-align: center;
    }

    nav.active {
        display: flex;
    }

    nav a {
        margin: 10px 0;
        padding: 8px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    nav a:last-child {
        border-bottom: none;
    }

    .nav-toggle {
        display: block;
        order: 1;
    }

    .logo {
        flex-grow: 1;
        justify-content: flex-start;
    }

    .docs-wrapper {
        flex-direction: column;
    }

    .sidebar {
        position: relative;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        padding: 1.5rem 1rem;
    }

    .main-content {
        padding: 1.5rem 1rem;
    }

    .main-content h1 {
        font-size: 2rem;
    }

    .main-content h2 {
        font-size: 1.6rem;
        margin-top: 2rem;
    }

    .main-content h3 {
        font-size: 1.2rem;
        margin-top: 1.5rem;
    }

    footer {
        padding: 1.5rem 1rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .header-inner {
        padding: 0.8rem 20px;
    }

    .docs-wrapper {
        padding: 0 15px;
    }

    .sidebar {
        width: 200px;
        padding: 1.5rem 0.8rem;
    }

    .main-content {
        padding: 2rem 2rem;
    }

    .main-content h1 {
        font-size: 2.2rem;
    }

    .main-content h2 {
        font-size: 1.7rem;
    }

    .main-content h3 {
        font-size: 1.3rem;
    }
}

@media (min-width: 1025px) {
    .sidebar {
        width: 250px;
    }

    .main-content {
        padding: 3rem 3rem;
    }
}