:root {
    --bg-color: #0f0f13;
    --surface-color: #1c1c24;
    --text-color: #e0e0e0;
    --text-muted: #8a8a9a;
    --accent-color: #6c5ce7;
    --accent-hover: #5a4bcf;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
}

header {
    background-color: var(--surface-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

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

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
}

main {
    flex: 1;
    padding: 3rem 0;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #fff;
}

p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.hero {
    text-align: center;
    padding: 4rem 0;
    background: radial-gradient(circle at center, #2a2a3a 0%, var(--bg-color) 70%);
    border-radius: 12px;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 3rem;
    color: #fff;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem auto;
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: #fff;
    padding: 0.75rem 2rem;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.section {
    margin-bottom: 4rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--surface-color);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.4);
}

.card-img {
    height: 160px;
    width: 100%;
}

.card h3 {
    padding: 1rem 1rem 0.5rem;
    font-size: 1.1rem;
    color: #fff;
}

.card .meta {
    padding: 0 1rem 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.categories {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.category-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background-color: var(--surface-color);
    color: var(--text-color);
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.category-tag:hover {
    background-color: var(--accent-color);
}

.content-box {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 12px;
}

.content-box ul {
    margin-left: 1.5rem;
    color: var(--text-muted);
}

.content-box li {
    margin-bottom: 0.5rem;
}

.error-page {
    text-align: center;
    padding-top: 6rem;
}

.error-page h1 {
    font-size: 6rem;
    color: var(--accent-color);
    margin-bottom: 0;
}

.error-page h2 {
    margin-bottom: 1rem;
}

footer {
    background-color: var(--surface-color);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: auto;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background: var(--surface-color);
        padding: 1rem;
        box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2rem;
    }
}