/* Reset et styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    scroll-behavior: smooth;
}

/* Navigation */
header {
    background: #fff;
    padding: 1rem 5%;
    position: fixed;
    width: 100%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1000;
}

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

nav ul {
    display: flex;
    list-style: none;
}

nav ul li a {
    margin-left: 2rem;
    text-decoration: none;
    color: #333;
    font-weight: 500;
}

/* Section Hero */
.hero {
    height: 80vh;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), 
                url('https://images.unsplash.com/photo-1497366216548-37526070297c') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero h1 { font-size: 3rem; margin-bottom: 1rem; }

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 1rem;
}

/* Services Grid */
.services {
    padding: 5rem 5%;
    background: #f4f4f4;
}

.services h2 { text-align: center; margin-bottom: 3rem; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.card:hover { transform: translateY(-5px); }

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    background: #333;
    color: white;
}