:root {
    --primary-color: #f39c12;
    --secondary-color: #2c3e50;
    --light-bg: #f4f7f6;
    --dark-text: #333;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    margin: 0;
    padding: 0;
}

.navbar {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar a {
    color: var(--white);
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: bold;
}

.navbar .brand {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.container {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.card {
    background: var(--white);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

h1, h2 {
    color: var(--secondary-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

input[type="text"], input[type="number"], select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: background 0.3s;
}

.btn:hover {
    background-color: #e67e22;
}

.btn-secondary {
    background-color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: #34495e;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    text-align: left;
    padding: 1rem;
    border-bottom: 1px solid #eee;
}

th {
    background-color: #f8f9fa;
    color: var(--secondary-color);
}

.result-box {
    background: #e8f4fd;
    border-left: 5px solid #3498db;
    padding: 1.5rem;
    margin-top: 1rem;
}

.footer {
    text-align: center;
    padding: 2rem;
    color: #777;
    font-size: 0.9rem;
}

/* --- ESTILOS DO MENU HAMBÚRGUER --- */
.menu-toggle {
    display: none; /* Escondido no Desktop */
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.menu-toggle span {
    width: 30px;
    height: 3px;
    background-color: white;
    border-radius: 2px;
    transition: 0.3s;
}

@media (max-width: 768px) {
    .result-box {
        padding: 15px !important;
    }
    .result-box p {
        font-size: 0.9rem;
    }
    .result-box p strong {
        display: block; /* Quebra linha entre o rótulo e o valor */
        margin-bottom: 5px;
    }
}

    .navbar {
        flex-direction: row !important; /* Mantém logo e botão na mesma linha */
        justify-content: space-between;
        align-items: center;
        position: relative;
    }

    .navbar nav {
        display: none; /* Esconde o menu por padrão */
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #2c3e50;
        padding: 1rem 0;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        z-index: 1000;
    }

    .navbar nav.active {
        display: flex; /* Mostra quando clicado */
    }

    .navbar nav a {
        padding: 15px;
        width: 100%;
        text-align: center;
        border-bottom: 1px solid #34495e;
        margin: 0 !important;
    }

    .mobile-special { color: #f39c12 !important; }
    .mobile-danger { color: #e74c3c !important; font-weight: bold; }

    /* Ajustes extras de Grid para o formulário de cálculo */
    div[style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }