```css
/* ------------------------------
   BASIC RESET
--------------------------------*/

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
    color: #243024;
    background: #fbfcf8;
}

a {
    color: inherit;
    text-decoration: none;
}


/* ------------------------------
   GENERAL
--------------------------------*/

.container {
    width: min(1100px, 90%);
    margin: 0 auto;
}

.section {
    padding: 90px 0;
}

.section-alt {
    background: #f1f5ed;
}

.section-heading {
    max-width: 650px;
    margin-bottom: 45px;
}

.section-heading h2 {
    margin-bottom: 12px;
    font-size: clamp(2rem, 4vw, 3rem);
}

.section-heading p {
    color: #647064;
}

.eyebrow {
    margin-bottom: 10px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}


/* ------------------------------
   HEADER
--------------------------------*/

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;

    background: rgba(251, 252, 248, 0.95);
    border-bottom: 1px solid #e1e6dc;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
}

nav {
    display: flex;
    gap: 25px;
}

nav a {
    font-size: 0.95rem;
    font-weight: 600;
}

nav a:hover,
.footer-links a:hover {
    text-decoration: underline;
}


/* ------------------------------
   HERO
--------------------------------*/

.hero {
    min-height: 650px;

    display: flex;
    align-items: center;

    background:
        linear-gradient(
            rgba(20, 35, 22, 0.58),
            rgba(20, 35, 22, 0.58)
        ),
        url("images/hero.jpg") center / cover no-repeat;

    color: white;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    margin-bottom: 20px;
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 0.95;
}

.hero-text {
    max-width: 650px;
    margin-bottom: 30px;
    font-size: 1.2rem;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}


/* ------------------------------
   BUTTONS
--------------------------------*/

.button {
    display: inline-block;

    padding: 13px 22px;

    border: 2px solid white;
    border-radius: 8px;

    font-weight: 700;

    background: white;
    color: #243024;

    transition: transform 0.15s ease,
                opacity 0.15s ease;
}

.button:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.button-secondary {
    background: transparent;
    color: white;
}


/* ------------------------------
   CARDS
--------------------------------*/

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.card {
    display: block;

    padding: 30px;

    background: white;

    border: 1px solid #e0e6dc;
    border-radius: 12px;

    transition:
        transform 0.15s ease,
        box-shadow 0.15s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.07);
}

.card-icon {
    display: block;
    margin-bottom: 15px;
    font-size: 2rem;
}

.card h3 {
    margin-bottom: 8px;
}

.card p {
    color: #687168;
}


/* ------------------------------
   YOUTUBE
--------------------------------*/

.youtube-section {
    background: #253526;
    color: white;
}

.youtube-box {
    max-width: 750px;
    margin: 0 auto;
    text-align: center;
}

.youtube-box h2 {
    margin-bottom: 15px;
    font-size: clamp(2rem, 5vw, 3.5rem);
}

.youtube-box p:not(.eyebrow) {
    margin-bottom: 30px;
    color: #d7dfd5;
}


/* ------------------------------
   SHOP
--------------------------------*/

.shop-placeholder {
    padding: 55px 25px;

    text-align: center;

    border: 2px dashed #ccd5c8;
    border-radius: 12px;
}

.shop-placeholder span {
    display: block;
    margin-bottom: 15px;
    font-size: 3rem;
}

.shop-placeholder h3 {
    margin-bottom: 8px;
}

.shop-placeholder p {
    color: #687168;
}


/* ------------------------------
   FOOTER
--------------------------------*/

.site-footer {
    padding: 45px 0 20px;

    background: #172319;
    color: white;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.footer-content p {
    margin-top: 4px;
    color: #aeb8ae;
}

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

.copyright {
    width: min(1100px, 90%);
    margin: 35px auto 0;
    padding-top: 20px;

    border-top: 1px solid #354337;

    color: #879287;
    font-size: 0.85rem;
}


/* ------------------------------
   MOBILE
--------------------------------*/

@media (max-width: 700px) {

    .nav-container {
        flex-direction: column;
        justify-content: center;
        gap: 10px;
        padding: 15px 0;
    }

    nav {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        min-height: 600px;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-links {
        flex-direction: column;
        gap: 8px;
    }
}
```