:root {
    --primary-blue: #0d6efd;
    --primary-green: #25D366;
    --text-dark: #222;
    --text-light: #fff;
}

@media (prefers-color-scheme: dark) {
    body {
        background: #111;
        color: #ddd;
    }
    .container {
        background: #1a1a1a;
        color: #eee;
    }
    footer {
        background: #000;
    }
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f5f5f5;
    color: var(--text-dark);
}

header {
    background: var(--primary-blue);
    color: white;
    padding: 25px;
    text-align: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.logo {
    font-size: 32px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    width: 22px;
    height: 22px;
    background: var(--primary-green);
    border-radius: 50%;
    position: relative;
}

.logo-icon::before,
.logo-icon::after {
    content: "";
    position: absolute;
    width: 14px;
    height: 2px;
    background: var(--primary-green);
    top: 10px;
    left: -16px;
}

.logo-icon::after {
    left: 24px;
}

nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

.container {
    max-width: 900px;
    margin: 40px auto;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

footer {
    background: #222;
    color: #ccc;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}

.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 25px;
    right: 25px;
    background-color: var(--primary-green);
    color: white;
    border-radius: 50%;
    text-align: center;
    font-size: 32px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    animation: pop 0.4s ease-out;
}

@keyframes pop {
    from { transform: scale(0.5); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}