/* =========================
   SITE PÚBLICO (ALUNOS)
   MOBILE FIRST
   ========================= */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #eef3f7;
    color: #222;
}

/* HEADER SIMPLES */
header {
    background: #29557d;
    color: #fff;
    padding: 15px;
    text-align: center;
}

.site-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.site-brand-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
    flex: 0 0 auto;
}

.site-brand-compact .site-brand-logo {
    width: 40px;
    height: 40px;
}

header h1 {
    font-size: 20px;
    margin: 0;
}

/* CONTEÚDO PRINCIPAL */
main {
    padding: 15px;
}

.install-app-prompt {
    display: grid;
    gap: 12px;
    margin-bottom: 18px;
    padding: 14px;
    border: 1px solid #c8d6e2;
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 0 2px 8px rgba(31, 59, 87, 0.08);
}

.install-app-prompt[hidden] {
    display: none;
}

.install-app-prompt p {
    margin: 6px 0 0;
    line-height: 1.5;
}

.install-app-button {
    width: 100%;
    border: 0;
    cursor: pointer;
    font-family: inherit;
}

.offline-card p {
    line-height: 1.6;
}

.aula-offline-controls {
    display: grid;
    gap: 10px;
    margin: 16px 0 18px;
}

.aula-offline-controls[hidden] {
    display: none;
}

.aula-offline-button,
.aula-offline-remove {
    width: 100%;
    border: 0;
    cursor: pointer;
    font-family: inherit;
}

.aula-offline-remove {
    background: #eef3f7;
    color: #1f3b57;
    border: 1px solid #c8d6e2;
}

.aula-offline-status {
    margin: 0;
    color: #1f3b57;
    line-height: 1.5;
}

/* CARD DE AULA */
.aula-card {
    background: #fff;
    padding: 16px;
    margin-bottom: 18px;
    border-radius: 10px;
    border: 1px solid #d9e1e8;
    box-shadow: 0 2px 8px rgba(31, 59, 87, 0.08);
}

.aulas-lista {
    display: grid;
    gap: 18px;
}

.aula-list-card {
    margin-bottom: 0;
}

.aula-card-meta {
    display: grid;
    gap: 6px;
    margin: 12px 0;
}

.aula-card-meta p {
    margin: 0;
}

.aula-card-indicadores {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.aula-indicador {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid #c8d6e2;
    background: #eef3f7;
    color: #1f3b57;
    font-size: 14px;
    font-weight: bold;
    line-height: 1.2;
}

.aula-card-descricao {
    margin: 12px 0 0;
    line-height: 1.6;
}

.aula-card-acoes {
    margin-top: 14px;
}

.aula-leitura-card {
    overflow: hidden;
}

.aula-meta {
    margin: 12px 0;
}

.aula-meta p {
    margin: 6px 0;
}

#inicio-aula {
    scroll-margin-top: 16px;
}

.aula-conteudo {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid #e5e5e5;
    font-size: 17px;
    line-height: 1.7;
}

.aula-midia {
    margin-top: 24px;
}

.aula-video {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}

.video-responsive {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-radius: 10px;
    background: #111;
}

.media-offline-message {
    display: none;
    margin: 12px 0 0;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #d8e0e7;
    background: #f8fafc;
    color: #1f3b57;
    line-height: 1.5;
}

.is-offline .media-offline-message {
    display: block;
}

.is-offline .aula-video,
.is-offline .video-responsive {
    display: none;
}

.is-offline .aula-imagem {
    display: none;
}

.is-offline .aula-imagem.offline-image-available {
    display: block;
}

.is-offline .aula-imagem-item.offline-image-cached .imagem-offline-message {
    display: none;
}

.video-responsive iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.aula-aviso {
    padding: 12px;
    border-radius: 8px;
    background: #f6f6f6;
    border: 1px solid #ddd;
}

.aula-imagens {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid #e5e5e5;
}

.aula-imagens h3 {
    margin-top: 0;
    color: #29557d;
}

.aula-imagem-item {
    padding: 16px 0;
    border-bottom: 1px solid #eee;
}

.aula-imagem-item:last-child {
    border-bottom: 0;
}

.aula-imagem-titulo {
    margin: 0 0 10px;
    color: #222;
    font-size: 18px;
    line-height: 1.35;
}

.aula-imagem-botao {
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: zoom-in;
}

.aula-imagem {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 10px;
    border: 1px solid #ddd;
    background: #f8f8f8;
}

.aula-imagem-descricao {
    margin: 12px 0 0;
    font-size: 16px;
    line-height: 1.65;
    color: #333;
}

.aula-acoes-finais {
    display: grid;
    gap: 10px;
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid #e5e5e5;
}

.image-lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    padding: 54px 14px 20px;
    background: rgba(0, 0, 0, 0.88);
    align-items: center;
    justify-content: center;
}

.image-lightbox-open {
    display: flex;
}

.image-lightbox-content {
    max-width: 100%;
    max-height: 86vh;
    width: auto;
    height: auto;
    object-fit: contain;
}

.image-lightbox-close {
    position: absolute;
    top: 10px;
    right: 12px;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 50%;
    background: #fff;
    color: #111;
    font-size: 30px;
    line-height: 1;
    cursor: pointer;
}

/* TÍTULO */
.aula-card h3 {
    font-size: 18px;
    margin-top: 0;
    margin-bottom: 0;
    color: #1f3b57;
    line-height: 1.35;
}

/* BOTÃO PADRÃO */
.btn {
    display: inline-block;
    padding: 14px 16px;
    background: #29557d;
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 16px;
    text-align: center;
    max-width: 100%;
}

.btn-secondary {
    background: #eef3f7;
    color: #1f3b57;
    border: 1px solid #c8d6e2;
}

/* BOTÃO GRANDE MOBILE (idosos) */
.btn-large {
    width: 100%;
    text-align: center;
    font-size: 18px;
}

/* FOOTER */
footer {
    margin-top: 30px;
    background: #111;
    color: #ccc;
    padding: 15px;
    text-align: center;
}

footer img {
    max-width: 160px;
    margin-top: 10px;
}
.btn-assistir {
    display: inline-block;
    padding: 8px 14px;
    background: #e50914; /* vermelho tipo YouTube */
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
    font-size: 14px;
    transition: 0.2s ease;
    max-width: 100%;
    text-align: center;
    white-space: nowrap;
}

.btn-assistir:hover {
    background: #b00610;
    transform: scale(1.03);
}

/* =========================
   DESKTOP (EXPANSÃO FUTURA)
   ========================= */
@media (min-width: 768px) {

    main {
        max-width: 900px;
        margin: auto;
    }

    header h1 {
        font-size: 24px;
    }

    .site-brand-logo {
        width: 60px;
        height: 60px;
    }

    .site-brand-compact .site-brand-logo {
        width: 46px;
        height: 46px;
    }

    .install-app-prompt {
        grid-template-columns: 1fr auto;
        align-items: center;
    }

    .install-app-button {
        width: auto;
        min-width: 210px;
    }

    .aula-offline-controls {
        grid-template-columns: auto auto;
        align-items: center;
    }

    .aula-offline-button,
    .aula-offline-remove {
        width: auto;
    }

    .aula-offline-status {
        grid-column: 1 / -1;
    }

    .aula-card {
        padding: 22px;
    }

    .aulas-lista {
        gap: 20px;
    }

    .aula-card-acoes .btn {
        width: auto;
        min-width: 220px;
    }

    .aula-acoes-finais {
        grid-template-columns: auto auto;
        justify-content: start;
    }

    .aula-acoes-finais .btn {
        width: auto;
        min-width: 220px;
    }

    .aula-conteudo {
        font-size: 18px;
    }

    .aula-imagem-item {
        padding: 22px 0;
    }
}