/* Definições de Cores do Manual */
:root {
    --petroleo: #011224;    /* Cor confiável e tradicional [cite: 32, 79] */
    --azul-primario: #0473E3; /* Cor de destaque [cite: 83] */
    --azul-claro: #A3C6E1;  /* Fundo secundário [cite: 87] */
    --gelo: #F3F2FC;        /* Fundo limpo [cite: 91] */
    --branco: #FFFFFF;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Montserrat', sans-serif; /* Conforme página 12 [cite: 108] */
    line-height: 1.6;
    color: var(--petroleo);
    background-color: var(--branco);
}

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

/* Header & Logo */
.navbar {
    background: var(--branco);
    padding: 20px 0;
    border-bottom: 1px solid var(--azul-claro);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 800; /* Extra Bold para impacto [cite: 108] */
}

.logo-ello { color: var(--azul-primario); }
.logo-solution { color: var(--petroleo); }

nav ul {
    display: flex;
    list-style: none;
}

nav ul li a {
    text-decoration: none;
    color: var(--petroleo);
    margin-left: 30px;
    font-weight: 500;
    transition: 0.3s;
}

nav ul li a:hover {
    color: var(--azul-primario);
}

.btn-primary {
    background: var(--azul-primario);
    color: var(--branco) !important;
    padding: 10px 20px;
    border-radius: 5px;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(1, 18, 36, 0.9), rgba(1, 18, 36, 0.9)), url('https://images.unsplash.com/photo-1517694712202-14dd9538aa97?auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    color: var(--branco);
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
}

.cta-button {
    display: inline-block;
    background: var(--azul-primario);
    color: var(--branco);
    padding: 15px 40px;
    text-decoration: none;
    font-weight: 700;
    border-radius: 4px;
    transition: 0.3s;
}

.cta-button:hover {
    background: #035db8;
    transform: translateY(-2px);
}

/* Seções Gerais */
.about {
    padding: 80px 0;
    text-align: center;
    background-color: var(--gelo);
}

.services {
    padding: 80px 0;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    padding: 40px;
    border: 1px solid var(--azul-claro);
    border-radius: 8px;
    transition: 0.3s;
}

.service-card:hover {
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    border-color: var(--azul-primario);
}

.service-card h3 {
    margin-bottom: 15px;
    color: var(--azul-primario);
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background-color: var(--gelo);
    text-align: center;
}

.contact h2 {
    margin-bottom: 20px;
    color: var(--azul-primario);
}

.contact p {
    margin-bottom: 40px;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--azul-claro);
    border-radius: 4px;
    font-family: inherit;
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

/* Footer */
.footer {
    background: var(--petroleo);
    color: var(--branco);
    padding: 40px 0;
    text-align: center;
    font-size: 0.9rem;
}

/* Responsividade */
@media (max-width: 768px) {
    .navbar .container { flex-direction: column; }
    nav ul { margin-top: 20px; }
    .hero h1 { font-size: 2rem; }
}