/* --- GLOBAL RESET & VARIABLES --- */
:root {
    --primary: #b71c1c; /* Red */
    --dark: #2c3e50;
    --light: #f4f4f4;
    --white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--light);
    line-height: 1.6;
    color: #333;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* --- HEADER & NAVIGATION --- */
header {
    background: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    font-weight: 600;
    color: var(--dark);
    transition: 0.3s;
}

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

/* --- HERO SECTION (Specific to Index) --- */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('images/hero.jpg'); 
    /* Fallback background color if image missing */
    background-color: var(--dark);
    background-size: cover;
    background-position: center;
    height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding: 0 20px;
}

.hero h1 { font-size: 3rem; margin-bottom: 10px; }
.hero p { font-size: 1.2rem; margin-bottom: 20px; }

.btn {
    padding: 10px 25px;
    background: var(--primary);
    color: var(--white);
    border-radius: 5px;
    font-weight: bold;
}

.btn:hover { background: #d32f2f; }

/* --- MAIN CONTENT --- */
.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.intro { text-align: center; margin-bottom: 40px; }

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

.card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    padding-bottom: 20px;
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card h3 { margin: 15px 0 10px; color: var(--primary); }
.card p { padding: 0 15px; }

/* --- FOOTER --- */
footer {
    background: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        display: none; /* Hide on mobile for simplicity in this pure CSS version */
        /* Ideally use JS for hamburger toggle, or keeping it simple: */
    }
    /* Simple Mobile Nav Override for Pure CSS Asssignment */
    .nav-links { display: flex; font-size: 0.9rem; gap: 10px; }
    .hero h1 { font-size: 2rem; }
}