/* Onglets des pages modules : Cours | Exercices | Vidéos | EFM */
.mt-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin: 25px 0 20px;
}

.mt-tab {
    --c: #0066cc;
    font: inherit;
    font-weight: bold;
    font-size: 15px;
    color: var(--c);
    background: #ffffff;
    border: 2px solid #e2e8f0;
    border-bottom: 4px solid var(--c);
    border-radius: 10px;
    padding: 14px 10px;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.mt-tab:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 35, 90, 0.08);
}

.mt-tab[aria-selected="true"] {
    background: var(--c);
    border-color: var(--c);
    color: #ffffff;
}

.mt-tab:focus-visible {
    outline: 3px solid #00235a;
    outline-offset: 2px;
}

.mt-panel {
    animation: mt-fade 0.2s ease;
    scroll-margin-top: 100px; /* ne pas passer sous le header fixe */
}

@keyframes mt-fade {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: none; }
}

/* ---------- Vidéos YouTube ---------- */
.mt-yt-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 18px;
}

.mt-yt-item { margin: 0; }

.mt-yt,
.mt-yt-frame {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 0;
    border-radius: 10px;
    background: #0f172a;
    overflow: hidden;
}

.mt-yt {
    position: relative;
    padding: 0;
    cursor: pointer;
}

.mt-yt img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.mt-yt:hover img { transform: scale(1.04); opacity: 0.85; }

.mt-yt-play {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 58px;
    height: 40px;
    margin: -20px 0 0 -29px;
    border-radius: 10px;
    background: #ff0000;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.mt-yt-playlist::after {
    content: "Playlist";
    position: absolute;
    bottom: 10px;
    right: 10px;
    color: #ffffff;
    font-size: 12px;
    font-weight: bold;
}

.mt-yt:focus-visible { outline: 3px solid #00235a; outline-offset: 2px; }

.mt-yt-title {
    margin-top: 8px;
    font-weight: bold;
    color: #00235a;
    font-size: 15px;
}

.mt-yt-item .mt-yt-open {
    display: inline-flex;
    gap: 6px;
    margin-top: 4px;
    font-size: 13px;
    color: #718096;
}

.mt-yt-item .mt-yt-open:hover { color: #ff0000; }

@media (max-width: 480px) {
    .mt-tabs { grid-template-columns: 1fr 1fr; }
    .mt-tab { font-size: 14px; padding: 12px 6px; }
}