.pdf-viewer {
    position: fixed;
    inset: 0;
    z-index: 10020;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(11, 18, 32, 0.78);
    backdrop-filter: blur(10px);
}

.pdf-viewer.is-open {
    display: flex;
}

.pdf-viewer__dialog {
    width: min(1120px, 100%);
    height: min(86vh, 900px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-radius: 22px;
    background: #fff;
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
}

.pdf-viewer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(17, 24, 39, 0.1);
}

.pdf-viewer__title {
    margin: 0;
    color: var(--text-dark);
    font-size: 1rem;
    line-height: 1.3;
}

.pdf-viewer__subject {
    margin: 4px 0 0;
    color: var(--text-muted);
    font-size: 0.86rem;
}

.pdf-viewer__actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.pdf-viewer__button {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 999px;
    color: var(--text-dark);
    background: rgba(17, 24, 39, 0.08);
    cursor: pointer;
    transition: var(--transition);
}

.pdf-viewer__button:hover {
    color: #fff;
    background: var(--primary-color);
}

.pdf-viewer__frame {
    width: 100%;
    flex: 1;
    border: 0;
    background: #f8fafc;
}

.pdf-viewer__fallback {
    padding: 18px;
    text-align: center;
    color: var(--text-muted);
}

body.pdf-viewer-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .pdf-viewer {
        padding: 10px;
    }

    .pdf-viewer__dialog {
        height: 92vh;
        border-radius: 16px;
    }

    .pdf-viewer__header {
        align-items: flex-start;
        padding: 12px;
    }

    .pdf-viewer__actions {
        gap: 6px;
    }

    .pdf-viewer__button {
        width: 36px;
        height: 36px;
    }
}