body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f8fafc;
    color: #1f2937;
}

/* NAVBAR */
nav {
    background: #0f172a;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav a {
    color: #e5e7eb;
    text-decoration: none;
    margin-left: 20px;
    font-size: 14px;
}

nav a:hover {
    color: white;
}

/* HERO */
.hero {
    background: url('https://images.unsplash.com/photo-1551434678-e076c223a692') center/cover;
    color: white;
    padding: 120px 20px;
    text-align: center;
    position: relative;
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.7);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 52px;
}

.cta {
    display: inline-block;
    margin-top: 25px;
    padding: 12px 28px;
    background: #3b82f6;
    border-radius: 8px;
    color: white;
    text-decoration: none;
}

/* CONTAINER */
.container {
    max-width: 1100px;
    margin: auto;
    padding: 60px 20px;
}

/* CARDS */
.card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    transition: 0.3s;
}

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

/* GRID */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* FOOTER */
footer {
    background: #0f172a;
    color: white;
    text-align: center;
    padding: 40px;
}