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

body {
    font-family: "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #111;
    background-color: #f5f5f5;
}

/* Hero */
.hero {
    height: 90vh;
    background: linear-gradient(
        rgba(0, 0, 0, 0.65),
        rgba(0, 0, 0, 0.65)
    ),
    url("https://images.unsplash.com/photo-1518770660439-4636190af475")
    center / cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.tagline {
    margin-top: 1rem;
    font-size: 1.2rem;
    max-width: 700px;
}

/* Sections */
.section {
    padding: 4rem 10%;
    background-color: #f5f5f5;
}

.section.dark {
    background-color: #111;
    color: #f5f5f5;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section p {
    font-size: 1.05rem;
}

/* Features */
.features {
    list-style: none;
    max-width: 800px;
}

.features li {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

/* Contact */
.contact {
    text-align: center;
}

.button {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 0.8rem 2rem;
    background-color: #111;
    color: #f5f5f5;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 2px solid #111;
    transition: all 0.3s ease;
}

.button:hover {
    background-color: transparent;
    color: #111;
}

/* Footer */
footer {
    background-color: #000;
    color: #aaa;
    text-align: center;
    padding: 1.5rem;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .section {
        padding: 3rem 7%;
    }
}