:root {
    --charcoal: #2D3748;
    --bronze: #A08C75;
    --light-grey: #E2E8F0;
    --white: #ffffff;
}

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

body {
    font-family: 'Archivo', sans-serif;
    background-color: var(--white);
    color: var(--charcoal);
    display: flex;
}

/* Sidebar */
.sidebar {
    width: 80px;
    height: 100vh;
    background-color: var(--charcoal);
    color: var(--white);
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 2rem 0;
    z-index: 100;
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.menu-items {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
}

.menu-items a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
    transition: color 0.3s;
}

.menu-items a:hover {
    color: var(--white);
}

.vertical-text {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 0.7rem;
    opacity: 0.5;
}

/* Main Content */
main {
    margin-left: 80px;
    width: 100%;
}

header {
    padding: 1rem 3rem;
    border-bottom: 1px solid var(--light-grey);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #666;
    text-transform: uppercase;
}

.top-bar a {
    color: var(--charcoal);
    text-decoration: none;
    font-weight: 700;
}

/* Hero */
.hero {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    height: 70vh;
    border-bottom: 1px solid var(--light-grey);
}

.hero-text {
    padding: 4rem 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero h1 {
    font-size: 3.5rem;
    text-transform: uppercase;
    line-height: 0.9;
    margin-bottom: 2rem;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #555;
    max-width: 400px;
}

.btn {
    display: inline-block;
    background-color: var(--charcoal);
    color: var(--white);
    padding: 1rem 2rem;
    text-decoration: none;
    text-transform: uppercase;
    font-weight: 700;
    font-size: 0.8rem;
    align-self: flex-start;
}

.hero-image {
    background-color: #f0f0f0;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    /* Industrial look */
}

/* Grid Section */
.grid-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-bottom: 1px solid var(--light-grey);
}

.grid-item {
    padding: 3rem;
    border-right: 1px solid var(--light-grey);
    text-align: center;
}

.grid-item:last-child {
    border-right: none;
}

.grid-item h2 {
    font-size: 3rem;
    color: var(--bronze);
    margin-bottom: 0.5rem;
}

.grid-item p {
    text-transform: uppercase;
    font-size: 0.8rem;
    font-weight: 700;
}

/* Content Section */
.content-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: 5rem 3rem;
    gap: 4rem;
    background-color: #f9f9f9;
}

.content-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.list-col ul {
    list-style: square;
    padding-left: 1rem;
}

.list-col li {
    margin-bottom: 1rem;
    font-weight: 500;
}

/* Footer */
footer {
    padding: 3rem;
    background-color: var(--charcoal);
    color: var(--white);
}

.footer-content h3 {
    text-transform: uppercase;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.small {
    margin-top: 2rem;
    font-size: 0.7rem;
    opacity: 0.5;
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        flex-direction: row;
        padding: 1rem;
    }

    .menu-items {
        display: none;
    }

    main {
        margin-left: 0;
    }

    .hero {
        grid-template-columns: 1fr;
        height: auto;
    }

    .grid-section,
    .content-section {
        grid-template-columns: 1fr;
    }

    .grid-item {
        border-right: none;
        border-bottom: 1px solid var(--light-grey);
    }
}