/* Shared learner controls; use each exam's existing theme. */
.teacher-assignments-panel {
    --assignment-text: var(--ielts-text, var(--text-primary, #202820));
    --assignment-muted: var(--ielts-text-secondary, var(--text-secondary, #556055));
    --assignment-card: var(--ielts-card, var(--bg-white, #fff));
    --assignment-border: var(--ielts-border, var(--border-primary, #d5ddd5));
    --assignment-accent: var(--ielts-primary, var(--primary, #4b6b4b));
}
body.dark-mode .teacher-assignments-panel, html.dark-mode .teacher-assignments-panel {
    --assignment-text: #f1f5f1;
    --assignment-muted: #c3cdc3;
    --assignment-card: #202920;
    --assignment-border: #485348;
    --assignment-accent: #a7c9a7;
}
.teacher-assignment-actions { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; }
.teacher-assignment-quiet-btn, .teacher-assignment-menu > summary, .teacher-assignment-confirm-btn {
    min-height: 44px; padding: .5rem .8rem; border: 1px solid var(--assignment-border);
    border-radius: 9px; color: var(--assignment-text); background: var(--assignment-card);
    font: inherit; font-size: .84rem; font-weight: 600; cursor: pointer;
}
.teacher-assignment-quiet-btn:hover, .teacher-assignment-menu > summary:hover { border-color: var(--assignment-accent); }
.teacher-assignment-quiet-btn:disabled { cursor: wait; opacity: .6; }
.teacher-assignment-menu { position: relative; }
.teacher-assignment-menu > summary { list-style: none; display: flex; align-items: center; justify-content: center; width: 44px; }
.teacher-assignment-menu > summary::-webkit-details-marker { display: none; }
.teacher-assignment-menu[open] > button {
    position: absolute; z-index: 20; right: 0; top: calc(100% + 6px); width: max-content;
    max-width: 220px; box-shadow: 0 5px 18px #0002;
}
.teacher-assignment-hidden-section, .teacher-assignment-message, #teacher-assignments-list > .teacher-assignment-empty { grid-column: 1 / -1; }
.teacher-assignment-hidden-section { border-top: 1px solid var(--assignment-border); padding-top: .8rem; margin-top: .8rem; }
.teacher-assignment-hidden-section > summary { min-height: 44px; cursor: pointer; color: var(--assignment-text); font-weight: 600; font-size: .9rem; }
.teacher-assignment-hidden-section .teacher-assignment-card { margin-top: .7rem; }
.teacher-assignment-hidden-label { margin: .6rem 0 0; color: var(--assignment-muted); font-size: .78rem; }
.teacher-assignment-message { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; padding: .7rem 0; color: var(--assignment-text); font-size: .85rem; }
.teacher-assignment-hide-dialog {
    width: min(460px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); overflow: auto;
    margin: auto; padding: 1.5rem; border: 1px solid var(--assignment-border); border-radius: 16px;
    color: var(--assignment-text); background: var(--assignment-card); box-shadow: 0 16px 65px #0004;
}
.teacher-assignment-hide-dialog::backdrop { background: #10181088; }
.teacher-assignment-hide-dialog h2 { margin: 0 0 .8rem; font-size: 1.2rem; color: var(--assignment-text); }
.teacher-assignment-hide-dialog p { margin: 0; font-size: .92rem; line-height: 1.65; color: var(--assignment-muted); overflow-wrap: anywhere; }
.teacher-assignment-dialog-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: .6rem; margin-top: 1.3rem; }
.teacher-assignment-confirm-btn { background: var(--assignment-accent); border-color: var(--assignment-accent); color: #fff; }
body.dark-mode .teacher-assignment-confirm-btn, html.dark-mode .teacher-assignment-confirm-btn { color: #172417; }
.teacher-assignment-quiet-btn:focus-visible, .teacher-assignment-confirm-btn:focus-visible,
.teacher-assignment-menu > summary:focus-visible, .teacher-assignment-hidden-section > summary:focus-visible {
    outline: 2px solid var(--assignment-accent); outline-offset: 3px;
}