:root {
    --green: #1b4332;
    --blue: #1d4e89;
    --sand: #d9cab3;
    --light: #f8f9fa;
    --dark: #222222;
}

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

body {
    font-family: Arial, Helvetica, sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background: white;
}

header {
    position: fixed;
    width: 100%;
    background: rgba(0,0,0,0.70);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: auto;
    padding: 1rem 2rem;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: white;
    font-size: 1.4rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: white;
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--sand);
}

.hero {
    height: 100vh;

    background:
        linear-gradient(
            rgba(0,0,0,0.45),
            rgba(0,0,0,0.45)
        ),
        url("https://images.unsplash.com/photo-1500375592092-40eb2168fd21?auto=format&fit=crop&w=1600&q=80");

    background-size: cover;
    background-position: center;

    display: flex;
    justify-content: center;
    align-items: center;

    text-align: center;
}

.hero-overlay {
    color: white;
    max-width: 800px;
    padding: 2rem;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 28px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
}

.btn-primary {
    background: var(--green);
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--green);
}

.section {
    padding: 6rem 2rem;
}

.container {
    max-width: 1200px;
    margin: auto;
}

.narrow {
    max-width: 800px;
}

h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--green);
    font-size: 2.2rem;
}

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

.card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
}

.card h3 {
    color: var(--blue);
    margin-bottom: 1rem;
}

.why-us {
    background: var(--green);
    color: white;
    padding: 5rem 2rem;
}

.why-us h2 {
    color: white;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    text-align: center;
}

.features div {
    background: rgba(255,255,255,.12);
    padding: 1rem;
    border-radius: 8px;
}

.future {
    background: var(--light);
    padding: 6rem 2rem;
}

.future-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.future-item {
    background: white;
    text-align: center;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,.08);
}

#contact {
    text-align: center;
}

#contact a {
    color: var(--blue);
    text-decoration: none;
}

footer {
    background: #111;
    color: white;
    text-align: center;
    padding: 2rem;
}

footer p:last-child {
    color: var(--sand);
    margin-top: .5rem;
}

@media (max-width: 768px) {

    .hero h1 {
        font-size: 2.5rem;
    }

    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
}