body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: #f9fafb;
}

/* HEADER */
header {
    background: white;
    padding: 15px 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

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

nav h1 {
    color: #0ea5e9;
}

nav a {
    margin-left: 20px;
    text-decoration: none;
    color: #333;
    font-weight: 500;
}

/* HERO */
.hero {
    background: url('https://images.unsplash.com/photo-1527515637462-cff94eecc1ac?auto=format&fit=crop&w=1600&q=80') no-repeat center/cover;
    color: white;
    text-align: center;
}

.overlay {
    background: rgba(0,0,0,0.65);
    padding: 100px 20px;
}

.btn {
    background: #0ea5e9;
    color: white;
    padding: 12px 25px;
    margin: 5px;
    display: inline-block;
    border-radius: 6px;
    text-decoration: none;
}

/* SECTION */
section {
    max-width: 1100px;
    margin: auto;
    padding: 60px 20px;
}

/* SERVICES */
.services {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(260px,1fr));
    gap: 25px;
}

.card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.card h3 {
    padding: 15px;
}

.card p {
    padding: 0 15px 20px;
}

/* FOOTER */
footer {
    background: #0f172a;
    color: white;
    padding: 40px 20px;
}

.footer-grid {
    max-width: 1100px;
    margin: auto;
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(250px,1fr));
    gap: 20px;
}

/* BUTTONS */
.call-btn, .whatsapp {
    position: fixed;
    bottom: 20px;
    padding: 15px;
    border-radius: 50%;
    color: white;
}

.call-btn { left: 20px; background: #0ea5e9; }
.whatsapp { right: 20px; background: #25D366; }