:root {
    /* paleta Próximo Nível Academy (identidade visual oficial) */
    --au-primary: #2D6CDF;       /* azul vibrante */
    --au-primary-dark: #0F2747;  /* azul marinho */
    --au-primary-light: #13B5C8; /* ciano */
    --au-accent: #13B5C8;
    --au-bg: #E8EEF5;            /* cinza claro */
    --au-ink: #0F2747;
    --au-radius: 18px;
    --au-radius-sm: 12px;
}

body.au-body {
    background-color: var(--au-bg);
    color: var(--au-ink);
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
}

/* ---------- navegação ---------- */
.au-nav {
    background: linear-gradient(135deg, var(--au-primary) 0%, var(--au-primary-dark) 100%);
    box-shadow: 0 2px 12px rgba(79, 70, 229, .25);
}

.au-nav .navbar-brand {
    font-weight: 700;
    letter-spacing: .01em;
}

.au-brand-tag {
    color: var(--au-primary-light);
    font-weight: 600;
    letter-spacing: 3px;
}

.au-nav .nav-link {
    border-radius: 999px;
    padding: .4rem .9rem;
    opacity: .85;
}

.au-nav .nav-link:hover,
.au-nav .nav-link.active {
    background: rgba(255, 255, 255, .14);
    opacity: 1;
}

/* foco sempre visível — teclado e leitor de tela */
.au-body a:focus-visible,
.au-body button:focus-visible,
.au-body input:focus-visible,
.au-body summary:focus-visible {
    outline: 3px solid var(--au-primary-light);
    outline-offset: 2px;
}

/* ---------- barra fixa de navegação no celular ---------- */
.au-tabbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1030;
    display: flex;
    background: #fff;
    border-top: 1px solid #dde5f0;
    box-shadow: 0 -4px 16px rgba(15, 39, 71, .08);
    padding-bottom: env(safe-area-inset-bottom);
}

.au-tabbar a {
    flex: 1;
    padding: .5rem 0 .55rem;
    text-align: center;
    font-size: .72rem;
    font-weight: 600;
    color: #64748b;
    text-decoration: none;
}

.au-tabbar a span {
    display: block;
    font-size: 1.25rem;
    line-height: 1.2;
}

.au-tabbar a.active {
    color: var(--au-primary);
}

@media (max-width: 991.98px) {
    .au-com-tabbar {
        padding-bottom: 5.5rem !important;
    }
}

.au-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .18);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .85rem;
    color: #fff;
}

/* ---------- login ---------- */
.au-login-wrap {
    min-height: calc(100vh - 40px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.au-login-card {
    max-width: 860px;
    width: 100%;
    border-radius: var(--au-radius);
    overflow: hidden;
    box-shadow: 0 20px 45px rgba(30, 27, 75, .12);
    border: none;
}

.au-login-hero {
    background: linear-gradient(160deg, var(--au-primary) 0%, var(--au-primary-dark) 100%);
    color: #fff;
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100%;
}

.au-login-hero .au-emoji {
    font-size: 2.75rem;
    margin-bottom: .5rem;
}

.au-login-form {
    padding: 3rem 2.5rem;
}

/* telas de um formulário só (recuperar/redefinir senha) — sem a coluna do hero */
.au-card-estreito {
    max-width: 480px;
}

.au-senha {
    position: relative;
}

.au-senha-toggle {
    position: absolute;
    right: .35rem;
    top: 50%;
    transform: translateY(-50%);
    border: none;
    background: transparent;
    font-size: 1.1rem;
    line-height: 1;
    padding: .5rem;
    cursor: pointer;
}

@media (max-width: 575.98px) {
    .au-login-hero,
    .au-login-form {
        padding: 2rem 1.5rem;
    }
}

/* ---------- saudação / dashboard ---------- */
.au-greeting h2 {
    font-weight: 700;
}

.au-section-title {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin: 2rem 0 1rem;
    font-weight: 700;
}

.au-section-title .badge {
    font-weight: 600;
}

.au-notif {
    border: none;
    border-left: 4px solid var(--au-primary);
    border-radius: var(--au-radius-sm);
    background: #fff;
    box-shadow: 0 4px 14px rgba(30, 27, 75, .06);
}

/* ---------- resumo numérico do topo ---------- */
.au-resumo {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: .75rem;
}

.au-resumo-item {
    background: #fff;
    border-radius: var(--au-radius-sm);
    padding: .85rem .5rem;
    text-align: center;
    box-shadow: 0 4px 14px rgba(30, 27, 75, .06);
}

.au-resumo-item strong {
    display: block;
    font-size: 1.5rem;
    line-height: 1.1;
    color: var(--au-primary);
}

.au-resumo-item span {
    font-size: .74rem;
    color: #64748b;
}

@media (max-width: 575.98px) {
    .au-resumo {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ---------- cartão "continue de onde parou" ---------- */
.au-continuar {
    display: flex;
    flex-wrap: wrap;
    background: #fff;
    border-radius: var(--au-radius);
    overflow: hidden;
    box-shadow: 0 10px 26px rgba(30, 27, 75, .10);
    border-top: 4px solid var(--au-primary-light);
}

.au-continuar-capa {
    flex: 0 0 240px;
    min-height: 170px;
    background: linear-gradient(135deg, var(--au-primary-light), var(--au-primary-dark));
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 2.5rem;
}

.au-continuar-info {
    flex: 1 1 320px;
    padding: 1.4rem 1.6rem;
}

.au-etiqueta {
    display: inline-block;
    background: #e0f2fe;
    color: #0369a1;
    border-radius: 999px;
    padding: .1rem .6rem;
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    margin-bottom: .4rem;
}

@media (max-width: 575.98px) {
    .au-continuar-capa {
        flex-basis: 100%;
        min-height: 110px;
    }
}

.au-vazio {
    background: #fff;
    border-radius: var(--au-radius);
    box-shadow: 0 6px 18px rgba(30, 27, 75, .06);
}

.au-contrato-card {
    border: none;
    border-radius: var(--au-radius-sm);
    box-shadow: 0 4px 14px rgba(30, 27, 75, .06);
}

/* ---------- cards de curso ---------- */
.au-curso-card {
    border: none;
    border-radius: var(--au-radius);
    overflow: hidden;
    box-shadow: 0 6px 18px rgba(30, 27, 75, .08);
    transition: transform .15s ease, box-shadow .15s ease;
    height: 100%;
}

.au-curso-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(30, 27, 75, .14);
}

.au-curso-cover {
    height: 120px;
    background-size: cover;
    background-position: center;
    background: linear-gradient(135deg, var(--au-primary-light), var(--au-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    position: relative;
}

.au-curso-cover .badge {
    position: absolute;
    top: .6rem;
    right: .6rem;
}

.au-curso-card.au-expirado {
    opacity: .75;
}

.au-curso-card.au-expirado .au-curso-cover {
    background: linear-gradient(135deg, #9ca3af, #6b7280);
}

.au-progress {
    height: 8px;
    border-radius: 999px;
    background: #ecebf7;
    overflow: hidden;
}

.au-progress .progress-bar {
    background: linear-gradient(90deg, var(--au-primary-light), var(--au-primary));
    border-radius: 999px;
}

.au-aviso {
    color: #b45309;
    background: #fff7ed;
    border-radius: 999px;
    padding: .15rem .6rem;
    font-size: .78rem;
    display: inline-block;
}

.au-btn-primary {
    background: var(--au-primary);
    border-color: var(--au-primary);
    border-radius: 999px;
    font-weight: 600;
}

.au-btn-primary:hover {
    background: var(--au-primary-dark);
    border-color: var(--au-primary-dark);
}

/* ---------- página do curso ---------- */
.au-hero {
    border-radius: var(--au-radius);
    background: linear-gradient(150deg, var(--au-primary) 0%, var(--au-primary-dark) 100%);
    color: #fff;
    padding: 2.5rem;
    margin-bottom: 1.5rem;
    background-size: cover;
    background-position: center;
    position: relative;
}

.au-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(150deg, rgba(55, 48, 163, .88), rgba(30, 27, 75, .88));
    border-radius: var(--au-radius);
}

.au-hero > * {
    position: relative;
}

.au-hero .au-progress {
    background: rgba(255, 255, 255, .25);
    max-width: 420px;
}

.au-back-link {
    color: var(--au-primary-dark);
    text-decoration: none;
    font-size: .9rem;
    font-weight: 600;
}

.au-back-link:hover {
    color: var(--au-primary);
    text-decoration: underline;
}

.au-modulo {
    border: none;
    border-radius: var(--au-radius);
    box-shadow: 0 6px 18px rgba(30, 27, 75, .06);
    margin-bottom: 1rem;
    overflow: hidden;
}

.au-modulo summary {
    list-style: none;
    cursor: pointer;
    padding: 1.1rem 1.4rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: .6rem;
}

.au-modulo summary::-webkit-details-marker { display: none; }

.au-modulo summary::after {
    content: "▾";
    margin-left: .4rem;
    color: var(--au-primary);
}

.au-modulo-contagem {
    margin-left: auto;
    font-size: .78rem;
    font-weight: 600;
    color: #64748b;
    background: #eef2f7;
    border-radius: 999px;
    padding: .12rem .6rem;
}

.au-modulo-contagem.au-completo {
    background: #dcfce7;
    color: #15803d;
}

.au-modulo[open] summary::after {
    content: "▴";
}

.au-aula {
    border-top: 1px solid #eee;
    padding: .9rem 1.4rem;
}

.au-aula-header {
    display: flex;
    align-items: center;
    gap: .8rem;
}

.au-aula-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #ecebf7;
    color: var(--au-primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.au-aula.au-concluida .au-aula-num {
    background: #dcfce7;
    color: #15803d;
}

.au-aula-titulo {
    font-weight: 600;
    flex-grow: 1;
}

/* aula em que o aluno parou: destacada e alvo da âncora #aula-N */
.au-aula.au-proxima {
    background: #f0f7ff;
    box-shadow: inset 3px 0 0 var(--au-primary);
}

.au-aula {
    scroll-margin-top: 90px;
}

.au-video {
    max-width: 720px;
    border-radius: var(--au-radius-sm);
    overflow: hidden;
}

.au-arquivo-icon {
    font-size: 1.3rem;
    margin-right: .6rem;
}