:root {
    --primary-color: #f43f5e; /* Red/Pink for OHS (Visuals) */
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #e2e8f0;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: rgba(15, 23, 42, 0.9);
    border-bottom: 1px solid #334155;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
}

nav a {
    color: #94a3b8;
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.3s;
}

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

main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.placeholder-content {
    text-align: center;
    max-width: 1000px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, var(--primary-color), #fb7185);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid #334155;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-top: 0;
}