/* ===== Variáveis de cores e estilos ===== */
:root {
    --primary: #0a5b68;
    --primary-hover: #084f5a;
    --bg-light: #f8f9fa;
    --card-bg: #ffffff;
    --text-dark: #122028;
    --muted: #6b7176;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* ===== Reset básico ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", Arial, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.5;
}

/* ===== Topo ===== */
.top-bar {
    background-color: var(--primary);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 6vw;
}

.top-bar .logo {
    font-weight: bold;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-return {
    background-color: #0d83a0;
    padding: 8px 14px;
    border-radius: 6px;
    color: white;
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s ease;
}

.btn-return:hover {
    background-color: #0b748f;
}

/* ===== Estrutura principal ===== */
main {
    max-width: 900px;
    margin: 30px auto;
    padding: 0 20px;
}

/* ===== Cards ===== */
.card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.card h2 {
    font-size: 18px;
    margin-bottom: 12px;
}

.card ul {
    padding-left: 18px;
}

.card li {
    margin-bottom: 6px;
}

/* ===== Seção de overview ===== */
.course-overview {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
}

.course-overview .course-text {
    flex: 2;
}

.course-overview .course-image {
    flex: 1;
    text-align: center;
}

.course-overview img {
    max-width: 150px;
    border-radius: 50%;
    object-fit: cover;
}

/* ===== Rodapé ===== */
footer {
    background-color: var(--primary);
    color: white;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 20px 6vw;
    gap: 20px;
}

footer a {
    color: white;
    text-decoration: underline;
}