:root {
    --color-primary: #001F3F; /* Azul Marinho */
    --color-secondary: #2E7D32; /* Verde Musgo */
    --color-accent: #FFC107; /* Amarelo Ouro */
    --color-text-dark: #343A40; /* Cinza Chumbo */
    --color-text-light: #f8f9fa;
    --font-title: 'Poppins', sans-serif;
    --font-body: 'Lato', sans-serif;
}

body {
    font-family: var(--font-body);
    color: var(--color-text-dark);
}

.font-poppins { font-family: var(--font-title); }
.font-lato { font-family: var(--font-body); }

#header.scrolled {
    background-color: rgba(0, 31, 63, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

.nav-link {
    position: relative;
    padding-bottom: 8px;
    font-family: var(--font-title);
    font-weight: 600;
    color: white;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease-in-out;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 40px;
    right: 40px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.25);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease-in-out;
}

.whatsapp-float:hover {
    transform: scale(1.1);
}