body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f5f7;
    color: #222;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: #111827;
    color: #fff;
}

header .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

header .logo img {
    height: 40px;
}

nav a {
    color: #e5e7eb;
    margin-left: 1rem;
    text-decoration: none;
    font-weight: 500;
}

nav a:hover {
    color: #ffffff;
}

.hero {
    padding: 4rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, #111827, #1f2937);
    color: #fff;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: #2563eb;
    color: #fff;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
}

.btn:hover {
    background: #1d4ed8;
}

.features {
    padding: 3rem 2rem;
}

.features .grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .features .grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

footer {
    text-align: center;
    padding: 1rem;
    background: #111827;
    color: #9ca3af;
    font-size: 0.9rem;
}

.contact {
    padding: 3rem 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.contact form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact input,
.contact textarea {
    padding: 0.5rem;
    border-radius: 0.375rem;
    border: 1px solid #d1d5db;
    font-size: 1rem;
}