.apmpdf-viewer,
.apmpdf-viewer * {
    box-sizing: border-box;
}

.apmpdf-viewer {
    width: var(--apmpdf-width, 100%);
    max-width: 100%;
    margin: 24px auto;
    overflow: hidden;
    background: var(--apmpdf-bg, #101915);
    border: 1px solid var(--apmpdf-border, #bda45a);
    border-radius: var(--apmpdf-radius, 10px);
}

.apmpdf-viewer--full {
    width: 100% !important;
}

.apmpdf-viewer--shadow {
    box-shadow: 0 18px 45px rgba(0,0,0,.18);
}

.apmpdf-viewer__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 16px;
    color: var(--apmpdf-text, #f7f4ea);
    background: linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,0));
    border-bottom: 1px solid rgba(189,164,90,.35);
}

.apmpdf-viewer__title {
    min-width: 0;
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.apmpdf-viewer__badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 46px;
    min-height: 24px;
    padding: 4px 8px;
    color: var(--apmpdf-button-text, #fff);
    background: var(--apmpdf-button-bg, #bda45a);
    border-radius: 4px;
    font-size: 10px;
    font-weight: 900;
    line-height: 1;
    letter-spacing: .08em;
}

.apmpdf-viewer__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.apmpdf-viewer__button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 8px 13px;
    color: var(--apmpdf-button-text, #fff) !important;
    background: var(--apmpdf-button-bg, #bda45a);
    border: 1px solid var(--apmpdf-button-bg, #bda45a);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .07em;
    line-height: 1;
    text-decoration: none !important;
    text-transform: uppercase;
}

.apmpdf-viewer__button--ghost {
    background: transparent;
    color: var(--apmpdf-text, #f7f4ea) !important;
    border-color: rgba(189,164,90,.55);
}

.apmpdf-viewer__notice {
    padding: 10px 16px;
    color: var(--apmpdf-text, #f7f4ea);
    background: rgba(189,164,90,.10);
    border-bottom: 1px solid rgba(189,164,90,.22);
    font-size: 13px;
    line-height: 1.35;
}

.apmpdf-viewer__frame-wrap {
    position: relative;
    width: 100%;
    height: var(--apmpdf-height, 780px);
    min-height: 220px;
    background: #f3f3f3;
}

.apmpdf-viewer__frame {
    position: relative;
    z-index: 2;
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
    background: #fff;
}

.apmpdf-viewer__fallback {
    position: absolute;
    z-index: 1;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 24px;
    color: #222;
    text-align: center;
}

.apmpdf-viewer__fallback p {
    margin: 0;
}

.apmpdf-viewer__fallback a {
    color: #182012;
    font-weight: 800;
}

.apmpdf-error {
    padding: 14px 16px;
    margin: 16px 0;
    background: #fff3cd;
    border: 1px solid #f0d98c;
    border-radius: 6px;
}

@media (max-width: 760px) {
    .apmpdf-viewer {
        margin: 18px auto;
        border-radius: calc(var(--apmpdf-radius, 10px) * .7);
    }

    .apmpdf-viewer__bar {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }

    .apmpdf-viewer__title {
        align-items: flex-start;
        flex-direction: column;
    }

    .apmpdf-viewer__actions {
        justify-content: flex-start;
        width: 100%;
    }

    .apmpdf-viewer__frame-wrap {
        height: min(var(--apmpdf-height, 780px), 72vh);
    }
}

/* Ajuste cuando se usa dentro del campus/sidebar */
body.apmcs-campus-sidebar-active .apmpdf-viewer {
    margin-top: 20px;
    margin-bottom: 28px;
}

body.apmcs-full-width-collapsed-enabled.apmcs-sidebar-collapsed.apmcs-learning-mode .apmpdf-viewer {
    width: 100% !important;
}