* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f7f8f5;
    color: #18352c;
    line-height: 1.65;
}


/* NAVBAR */

.navbar {
    background: #1b382e;
    color: white;

    padding: 18px 7%;

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

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 2px;
}

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

    margin-left: 22px;

    font-size: 14px;
}

.nav-links a:hover {
    opacity: 0.75;
}


/* HERO */

.hero {
    background: linear-gradient(
        135deg,
        #2b5748,
        #1b382e
    );

    color: white;

    text-align: center;

    padding: 80px 7%;
}

.hero h1 {
    font-size: 48px;

    margin: 0 0 15px;
}

.hero p {
    max-width: 650px;

    margin: 0 auto 30px;

    color: #eaf1ed;
}


.button {
    display: inline-block;

    background: white;
    color: #1b382e;

    padding: 12px 24px;

    border-radius: 10px;

    text-decoration: none;

    font-weight: 700;
}


/* CONTENT */

.container {
    max-width: 900px;

    margin: 50px auto;

    padding: 0 24px;
}

.card {
    background: white;

    padding: 32px;

    border-radius: 18px;

    box-shadow:
        0 8px 28px rgba(0, 0, 0, 0.06);
}

h1 {
    color: #1b382e;
}

h2 {
    color: #2b5748;

    margin-top: 32px;
}


/* NOTICE */

.notice {
    background: #eef4f0;

    border-left: 4px solid #2b5748;

    padding: 15px 18px;

    border-radius: 8px;

    margin-top: 25px;
}


/* FOOTER */

footer {
    background: #1b382e;

    color: #dce8e2;

    text-align: center;

    padding: 30px 20px;

    margin-top: 60px;

    font-size: 13px;
}

footer a {
    color: white;

    margin: 0 8px;

    text-decoration: none;
}


/* MOBILE */

@media (max-width: 650px) {

    .navbar {
        flex-direction: column;

        gap: 12px;

        padding: 16px 5%;
    }

    .nav-links a {
        margin: 0 6px;

        font-size: 12px;
    }

    .hero {
        padding: 60px 6%;
    }

    .hero h1 {
        font-size: 38px;
    }

    .container {
        margin: 30px auto;

        padding: 0 16px;
    }

    .card {
        padding: 22px;
    }

}