:root {
    --primary: #d32f2f; /* Vermelho Automotivo */
    --dark: #414141;
    --light: #f4f4f4;
    --white: #ffffff;
}

* { margin: 0; padding: 0; box-config: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

body { background-color: var(--light); color: var(--dark); line-height: 1.6; }

.container { max-width: 1100px; margin: auto; padding: 0 20px; }

/* Header & Nav */
header { background: var(--dark); color: var(--white); padding: 20px 0; position: sticky; top: 0; z-index: 100; }
nav { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; font-weight: bold; }
.logo span { color: var(--primary); }
nav ul { display: flex; list-style: none; }
nav ul li { margin-left: 20px; }
nav ul li a { color: var(--white); text-decoration: none; font-weight: 500; }

/* Hero Section */
.hero { background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('img_back.jpeg') center/cover; 
        height: 80vh; display: flex; align-items: center; text-align: center; color: var(--white); }
.hero h1 { font-size: 3rem; margin-bottom: 20px; }
.btn-cta { background: var(--primary); color: var(--white); padding: 15px 30px; text-decoration: none; border-radius: 5px; font-weight: bold; display: inline-block; transition: 0.3s; }
.btn-cta:hover { background: #b71c1c; transform: scale(1.05); }

/* Serviços */
#servicos { padding: 80px 0; text-align: center; }
.grid-servicos { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-top: 40px; }
.card { background: var(--white); padding: 30px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); border-bottom: 4px solid var(--primary); }

/* Responsividade */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    nav ul { display: none; } /* Simplificação para mobile */
}