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

body {
    font-family: 'Segoe UI', sans-serif;
    display: flex; /* Faz a Sidebar ficar ao lado do conteúdo */
    background-color: #f0f4f8;
    color: #1e293b;
}

/* BARRA LATERAL FIXA */
.sidebar {
    width: 280px;
    height: 100vh;
    background-color: #1e40af; /* O azul que você gostou */
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    padding: 30px 20px;
    box-shadow: 4px 0 10px rgba(0,0,0,0.1);
    z-index: 1000;
}

.sidebar h2 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 40px;
    text-align: center;
    letter-spacing: 2px;
}

/* CLASSES DE BOTÕES NA SIDEBAR */
.nav-group {
    margin-bottom: 30px;
}

.nav-group label {
    color: #93c5fd;
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
    margin-left: 10px;
    display: block;
    margin-bottom: 10px;
}

.btn-nav {
    display: block;
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 8px;
    background: transparent;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: 0.3s;
    border: none;
    text-align: left;
    cursor: pointer;
}

.btn-nav:hover {
    background-color: #3b82f6;
    padding-left: 25px;
}

.btn-nav.active {
    background-color: #ffffff;
    color: #1e40af;
}

/* ÁREA DE CONTEÚDO (LONGÍSSIMA) */
.main-content {
    margin-left: 280px; /* Mesma largura da sidebar */
    width: calc(100% - 280px);
    padding: 80px 10%;
}

.section-long {
    margin-bottom: 100px;
    background: white;
    padding: 60px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.section-long h1, .section-long h2 {
    color: #1e3a8a;
    margin-bottom: 20px;
}

.image-placeholder {
    width: 100%;
    height: 450px;
    background: #e2e8f0;
    margin: 30px 0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-style: italic;
    color: #64748b;
}

footer {
    margin-top: 50px;
    padding: 40px;
    text-align: center;
    border-top: 1px solid #ddd;
}