/**
 * LumorowLMS — Duolingo Reading Fill in the Blanks frontend styles
 * Layout/feel adapted from Duolingo DET; brand orange via shared.css vars.
 */

.llmsb-duorf-block {
    background: #fff;
    border: 1px solid var(--llmsb-border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,.05);
    margin-bottom: 2rem;
}

/* ── Header ─────────────────────────────────────── */
.llmsb-duorf-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 22px;
    border-bottom: 1px solid var(--llmsb-border);
    background: #fff;
    gap: 16px;
}
.llmsb-duorf-timer {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--llmsb-mid);
    font-size: 1rem;
}
.llmsb-duorf-timer-icon { display: inline-flex; align-items: center; justify-content: center; color: var(--llmsb-mid); }
.llmsb-duorf-timer-val {
    color: var(--llmsb-dark);
    font-weight: 800;
    font-size: 1.05rem;
    font-variant-numeric: tabular-nums;
    transition: color .15s ease;
}
.llmsb-duorf-timer-label { color: var(--llmsb-muted); font-size: .9rem; }
.llmsb-duorf-timer--low .llmsb-duorf-timer-val { color: var(--llmsb-primary); animation: llmsb-duorf-pulse .8s ease-in-out infinite; }
.llmsb-duorf-timer--up  .llmsb-duorf-timer-val { color: var(--llmsb-wrong); }
@keyframes llmsb-duorf-pulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.12); }
}
.llmsb-duorf-progress {
    font-size: .9rem;
    color: var(--llmsb-muted);
    font-variant-numeric: tabular-nums;
}
.llmsb-duorf-progress-cur { color: var(--llmsb-dark); font-weight: 700; }
.llmsb-duorf-progress-sep { margin: 0 4px; }

/* ── Stage (instruction + sentence) ─────────────── */
.llmsb-duorf-stage[hidden] { display: none; }
.llmsb-duorf-stage {
    padding: 56px 24px 48px;
    background: #fff;
}
.llmsb-duorf-prompt {
    text-align: center;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--llmsb-dark);
    margin: 0 0 48px;
}
.llmsb-duorf-sentence {
    font-size: 1.15rem;
    line-height: 2.4;
    color: var(--llmsb-dark);
    max-width: 860px;
    margin: 0 auto;
    text-align: left;
}

/* ── Inline letter-cell word ────────────────────── */
.llmsb-duorf-word {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    margin: 0 2px;
    vertical-align: -3px;
}
.llmsb-duorf-cell {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 28px;
    line-height: 1;
    background: #fff;
    border: 1.5px solid #d6d6db;
    border-radius: 4px;
    font: inherit;
    font-size: 1rem;
    color: var(--llmsb-dark);
    padding: 0;
    text-align: center;
    box-sizing: border-box;
    text-transform: lowercase;
}
.llmsb-duorf-cell.given {
    color: var(--llmsb-dark);
    cursor: default;
}
input.llmsb-duorf-cell {
    appearance: none;
    -webkit-appearance: none;
    outline: none;
    transition: border-color .15s ease, background .15s ease, box-shadow .15s ease;
    caret-color: var(--llmsb-primary);
}
input.llmsb-duorf-cell:focus {
    border-color: var(--llmsb-primary);
    background: var(--llmsb-primary-pale);
    box-shadow: 0 0 0 2px rgba(247, 114, 5, .25);
}
input.llmsb-duorf-cell.filled { background: #f9fafb; }
input.llmsb-duorf-cell:disabled { background: #f9fafb; color: var(--llmsb-muted); }

/* ── Footer (Submit) ────────────────────────────── */
.llmsb-duorf-footer[hidden] { display: none; }
.llmsb-duorf-footer {
    display: flex;
    justify-content: flex-end;
    padding: 14px 22px 20px;
    border-top: 1px solid var(--llmsb-border);
    background: #fff;
}
.llmsb-duorf-submit {
    appearance: none;
    background: linear-gradient(135deg, var(--llmsb-primary), var(--llmsb-primary-dk));
    color: #fff !important;
    border: 0;
    border-radius: 8px;
    padding: 10px 28px;
    font: inherit;
    font-size: .95rem;
    font-weight: 700;
    cursor: pointer;
    transition: opacity .15s ease, transform .15s ease;
    text-transform: uppercase;
    letter-spacing: .6px;
}
.llmsb-duorf-submit:hover:not(:disabled)  { opacity: .9; }
.llmsb-duorf-submit:active:not(:disabled) { transform: translateY(1px); }
.llmsb-duorf-submit:disabled              { opacity: .45; cursor: not-allowed; }

/* ── Results table ──────────────────────────────── */
.llmsb-duorf-results[hidden] { display: none; }
.llmsb-duorf-results {
    padding: 22px 22px 26px;
    border-top: 1px solid var(--llmsb-border);
    background: #fff;
}
.llmsb-duorf-r-summary { text-align: center; margin-bottom: 18px; }
.llmsb-duorf-r-bignum {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--llmsb-primary);
    line-height: 1;
}
.llmsb-duorf-r-bigpct {
    color: var(--llmsb-muted);
    font-size: .95rem;
    margin-top: 4px;
}
.llmsb-duorf-r-tablewrap { overflow-x: auto; }
.llmsb-duorf-r-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .92rem;
}
.llmsb-duorf-r-table th,
.llmsb-duorf-r-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--llmsb-border);
    text-align: left;
    vertical-align: top;
}
.llmsb-duorf-r-table th {
    background: #f9fafb;
    color: var(--llmsb-muted);
    font-weight: 700;
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .5px;
}
.llmsb-duorf-r-table td.n { color: var(--llmsb-muted); width: 40px; font-variant-numeric: tabular-nums; }
.llmsb-duorf-r-table td.w { font-weight: 600; color: var(--llmsb-primary); }
.llmsb-duorf-r-table tr.ok td.m { color: var(--llmsb-correct); font-weight: 800; }
.llmsb-duorf-r-table tr.no td.m { color: var(--llmsb-wrong);   font-weight: 800; }
.llmsb-duorf-r-table tr.ok td.y { color: var(--llmsb-correct); font-weight: 600; }
.llmsb-duorf-r-table tr.no td.y { color: var(--llmsb-wrong);   font-weight: 600; }
.llmsb-duorf-r-deferred {
    text-align: center;
    padding: 16px 20px;
    background: var(--llmsb-primary-pale);
    border: 1px solid var(--llmsb-primary);
    border-radius: 10px;
    color: var(--llmsb-primary-dk);
    font-weight: 600;
}

/* ── Check button + score (shared aggregator pattern) ──
   .llmsb-duorf-check inherits the standard centered .llmsb-check-btn
   style from shared.css — do NOT override width here. */
.llmsb-duorf-score { margin: 0 22px 22px; }

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 520px) {
    .llmsb-duorf-stage { padding: 32px 16px 32px; }
    .llmsb-duorf-prompt { font-size: 1.15rem; margin-bottom: 28px; }
    .llmsb-duorf-sentence { font-size: 1rem; line-height: 2.2; }
    .llmsb-duorf-cell { width: 18px; height: 24px; font-size: .9rem; }
}