:root {
    --bg-color: #0f172a;
    --text-color: #f1f5f9;
    --accent: #e11d48; /* MSU Red-ish accent */
    --card-bg: #1e293b;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    margin: 0;
}

nav {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    padding: 1rem 0;
    border-bottom: 1px solid #334155;
}

.nav-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.tab-btn {
    background: none;
    border: none;
    color: #94a3b8;
    padding: 10px 15px;
    cursor: pointer;
    font-weight: 600;
    transition: 0.3s;
}

.tab-btn:hover, .tab-btn.active {
    color: var(--accent);
}

.tab-content {
    display: none;
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.lang-category {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid var(--accent);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}