* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    line-height: 1.6;
}

/* Header */
header {
    background: #0d1b2a;
    color: white;
    padding: 15px;
    text-align: center;
}

nav a {
    color: white;
    margin: 0 10px;
    text-decoration: none;
}

nav a:hover {
    color: #00b4d8;
}

/* Hero */
.hero {
    background: linear-gradient(to right, #0077b6, #00b4d8);
    color: white;
    padding: 80px 20px;
    text-align: center;
}

.hero button {
    margin-top: 20px;
    padding: 12px 25px;
    border: none;
    background: white;
    color: #0077b6;
    cursor: pointer;
    border-radius: 5px;
}

/* Sections */
.section {
    padding: 50px 20px;
    text-align: center;
}

.dark {
    background: #f1f1f1;
}

/* Cards */
.cards {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.card {
    background: white;
    margin: 10px;
    padding: 20px;
    width: 200px;
    border-radius: 6px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Form */
form input, form button {
    width: 80%;
    padding: 10px;
    margin: 10px 0;
}

form button {
    background: #0077b6;
    color: white;
    border: none;
    cursor: pointer;
}

/* WhatsApp Button */
.whatsapp {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #25D366;
    color: white;
    font-size: 24px;
    padding: 12px;
    border-radius: 50%;
    text-decoration: none;
}

/* Footer */
footer {
    background: #0d1b2a;
    color: white;
    text-align: center;
    padding: 15px;
}