/* ================================================================
   EXAM PREP — practice questions inside a course page
   Built only from the portal's own tokens (styles.css): plum/navy for
   structure, gold rules, the success green and wine error colors used
   elsewhere in the portal. Content is read-only: no selection, copy,
   drag, context menu or printing (see exam-prep.js).
   ================================================================ */
.ep { display: flex; flex-direction: column; gap: 22px; }
.ep-protected,
.ep-protected * {
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

/* Instructor publishing panel (rendered by app.js) */
.ep-admin { display: flex; flex-direction: column; gap: 8px; margin-bottom: 26px; }
.ep-admin-title,
.ep-label,
.ep-bank-title {
    font-family: var(--font-sans);
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}
.ep-admin .content-item { flex-wrap: wrap; }
.ep-admin .content-info { flex: 1 1 14rem; min-width: 0; }
.ep-status { font-size: 0.74rem; font-weight: 600; white-space: nowrap; }
.ep-status.on { color: #2d7d46; }
.ep-status.off { color: var(--text-tertiary); }

/* Introduction */
.ep-intro {
    background: var(--bg-cream);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 22px;
}
.ep-lede {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--text-secondary);
    max-width: 46rem;
}
.ep-note { font-size: 0.76rem; color: var(--text-tertiary); margin-top: 8px; }

/* Controls */
.ep-controls { display: flex; flex-direction: column; gap: 12px; }
.ep-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; min-width: 0; }
.ep-label { min-width: 7.5rem; }
.ep .filter-bar { margin-bottom: 0; flex-wrap: wrap; max-width: 100%; }
.ep .filter-btn { display: inline-flex; align-items: center; gap: 6px; }
.ep-count { font-family: 'JetBrains Mono', monospace; font-size: 0.68rem; opacity: 0.75; }
.ep-lock { display: inline-flex; opacity: 0.7; }
.ep-scope { font-size: 0.78rem; color: var(--text-tertiary); width: 100%; }
.ep-selects label { display: inline-flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--text-secondary); min-width: 0; max-width: 100%; }
.ep-select {
    font: inherit;
    font-size: 0.8rem;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border);
    background: var(--bg-cream);
    color: var(--text-primary);
    min-width: 0;
    max-width: 100%;
}
.ep-select:focus { border-color: var(--plum-light); outline: none; }

/* Summary */
.ep-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 18px;
    padding: 14px 18px;
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.ep-progress { flex: 1 1 10rem; height: 6px; border-radius: 3px; background: var(--plum-soft); overflow: hidden; }
.ep-progress i { display: block; height: 100%; background: var(--plum); }
.ep-stats { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 0.8rem; color: var(--text-secondary); }
.ep-stats b { font-family: var(--font-display); font-weight: 700; font-variant-numeric: tabular-nums; }
.ep-stats .ok b { color: #2d7d46; }
.ep-stats .no b { color: var(--c-wine); }
.ep-link {
    background: none;
    border: 0;
    padding: 0;
    font: inherit;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--plum);
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.ep-link:hover { color: var(--plum-deep); }
.ep-confirm { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 0.8rem; color: var(--text-secondary); }

/* Groups and questions */
.ep-list { display: flex; flex-direction: column; gap: 28px; }
.ep-group { display: flex; flex-direction: column; gap: 10px; }
.ep-group-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 4px 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--rule);
}
.ep-group-head h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--plum-deep);
}
.ep-group-head span { font-size: 0.76rem; color: var(--text-tertiary); }
.ep-meter { display: inline-flex; align-items: flex-end; gap: 2px; height: 11px; }
.ep-meter i { display: block; width: 4px; border-radius: 1px; background: var(--plum-mid); }
.ep-meter i:nth-child(1) { height: 4px; }
.ep-meter i:nth-child(2) { height: 7px; }
.ep-meter i:nth-child(3) { height: 11px; }
.ep-meter.l1 i:nth-child(-n+1),
.ep-meter.l2 i:nth-child(-n+2),
.ep-meter.l3 i { background: var(--plum); }

.ep-q {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 14px;
    padding: 18px;
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.ep-num {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--plum-soft);
    color: var(--plum-deep);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-variant-numeric: tabular-nums;
}
.ep-body { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.ep-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; font-size: 0.72rem; color: var(--text-tertiary); }
.ep-level {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-sans);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--plum);
}
.ep-stem {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.98rem;
    line-height: 1.65;
    color: var(--text-primary);
    max-width: 46rem;
}

/* True / False */
.ep-tf { display: flex; flex-wrap: wrap; gap: 8px; }
.ep-choice {
    min-width: 7.5rem;
    padding: 9px 22px;
    border-radius: 4px;
    border: 1px solid var(--rule);
    background: #fff;
    color: var(--plum-deep);
    font-family: var(--font-display);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    cursor: pointer;
    transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.ep-choice:hover:not([disabled]) { border-color: var(--plum); }

/* Multiple choice */
.ep-opts { display: flex; flex-direction: column; gap: 8px; max-width: 46rem; }
.ep-opt {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 12px;
    align-items: start;
    width: 100%;
    text-align: left;
    padding: 10px 14px;
    background: var(--bg-cream);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.ep-opt:hover:not([disabled]) { border-color: var(--plum-light); }
.ep-letter {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid var(--rule);
    background: #fff;
    color: var(--plum-deep);
    font-family: var(--font-display);
    font-size: 0.72rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ep-choice[disabled], .ep-opt[disabled] { cursor: default; }
.ep .is-ok { border-color: #2d7d46 !important; background: rgba(45,125,70,0.08) !important; }
.ep .is-no { border-color: var(--c-wine) !important; background: rgba(155,44,44,0.07) !important; }
.ep .is-dim { opacity: 0.55; }

/* Feedback */
.ep-fb {
    display: flex;
    flex-direction: column;
    gap: 3px;
    max-width: 46rem;
    padding: 10px 14px;
    border-left: 3px solid #2d7d46;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: var(--bg-cream);
    font-size: 0.86rem;
    line-height: 1.6;
    color: var(--text-secondary);
}
.ep-fb.no { border-left-color: var(--c-wine); }
.ep-fb strong { font-family: var(--font-display); font-weight: 700; color: #2d7d46; }
.ep-fb.no strong { color: var(--c-wine); }
.ep-fb:focus { outline: none; }
.ep-src { font-size: 0.74rem; color: var(--text-tertiary); }

/* Fill in the gaps */
.ep-bank {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 16px 18px;
    background: var(--bg-cream);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.ep-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.ep-chip {
    padding: 3px 12px;
    border-radius: var(--radius-full);
    border: 1px solid var(--rule);
    background: #fff;
    color: var(--plum-deep);
    font-size: 0.78rem;
    font-weight: 600;
}
.ep-chip.used { text-decoration: line-through; opacity: 0.45; }
.ep-gapline { font-size: 0.98rem; font-weight: 400; line-height: 2; color: var(--text-primary); max-width: 46rem; }
.ep-gap-select {
    max-width: 100%;
    margin-inline: 2px;
    padding: 3px 8px;
    border: 1px solid var(--rule);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--plum-deep);
    font: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    line-height: 1.3;
    vertical-align: baseline;
}
.ep-gap-select.is-ok { color: #2d7d46; }
.ep-gap-select.is-no { color: var(--c-wine); }
.ep-gap-select[disabled] { opacity: 1; }
.ep-setbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.ep-setbar .btn[disabled] { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }
.ep-hint { font-size: 0.76rem; color: var(--text-tertiary); }
.ep-loading { padding: 28px 0; font-size: 0.85rem; color: var(--text-tertiary); }

/* Never printable */
.ep-print { display: none; }
@media print {
    .ep, .ep-admin { display: none !important; }
    .ep-print { display: block !important; }
}

@media (max-width: 768px) {
    .ep-q { grid-template-columns: 1fr; gap: 10px; padding: 16px; }
    .ep-num { width: 32px; height: 32px; font-size: 0.82rem; }
    .ep-label { min-width: 0; width: 100%; }
    .ep .filter-bar { border-radius: 16px; }
    .ep-intro { padding: 16px; }
}