.decision-feedback {
    --feedback-accent: #60d8f1;
    align-items: start;
    animation: decision-feedback-enter 200ms ease-out both;
    background: linear-gradient(135deg, rgba(15, 31, 49, 0.98), rgba(11, 23, 38, 0.98));
    border: 1px solid color-mix(in srgb, var(--feedback-accent) 34%, #29445f);
    border-left: 4px solid var(--feedback-accent);
    border-radius: 14px;
    box-sizing: border-box;
    color: #d6e3ef;
    display: grid;
    gap: 0.85rem;
    grid-template-columns: 2rem minmax(0, 1fr);
    margin-block: 1rem;
    max-width: 100%;
    min-width: 0;
    overflow-wrap: anywhere;
    padding: 1rem 1.1rem;
}

.decision-feedback[hidden] {
    display: none;
}

.decision-feedback--needs-improvement {
    --feedback-accent: #f2b84b;
    background: linear-gradient(135deg, rgba(67, 48, 17, 0.42), rgba(13, 25, 39, 0.98));
}

.decision-feedback--incorrect {
    --feedback-accent: #e77a7a;
    background: linear-gradient(135deg, rgba(69, 28, 35, 0.48), rgba(13, 24, 38, 0.98));
}

.decision-feedback--success {
    --feedback-accent: #55d6a2;
    background: linear-gradient(135deg, rgba(17, 64, 53, 0.45), rgba(13, 26, 39, 0.98));
}

.decision-feedback__icon {
    align-items: center;
    background: color-mix(in srgb, var(--feedback-accent) 14%, transparent);
    border: 1px solid color-mix(in srgb, var(--feedback-accent) 52%, transparent);
    border-radius: 50%;
    color: var(--feedback-accent);
    display: inline-flex;
    font-size: 1rem;
    font-weight: 800;
    height: 2rem;
    justify-content: center;
    line-height: 1;
    width: 2rem;
}

.decision-feedback__content {
    min-width: 0;
}

.decision-feedback__title {
    color: #f7f3e8;
    font-size: clamp(1rem, 1.4vw, 1.1rem);
    line-height: 1.35;
    margin: 0;
}

.decision-feedback__message,
.decision-feedback__action {
    color: #c7d4df;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0.35rem 0 0;
    max-width: 74ch;
}

.decision-feedback__action {
    color: #dce7ef;
}

.decision-feedback__action strong {
    color: var(--feedback-accent);
    margin-right: 0.2rem;
}

.decision-feedback:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--feedback-accent) 72%, white);
    outline-offset: 3px;
}

/* Shared Learn-stage checkpoint layout across every premium lesson family. */
.lesson-knowledge-check { --knowledge-accent: #60d8f1; }
.nw-campaign .lesson-knowledge-check { --knowledge-accent: var(--nw-cyan); }
.pe-campaign .lesson-knowledge-check { --knowledge-accent: var(--pe-cyan); }
.compression-campaign .lesson-knowledge-check { --knowledge-accent: var(--compression-cyan); }
.cpu-campaign .lesson-knowledge-check { --knowledge-accent: var(--cpu-cyan); }
.storage-campaign .lesson-knowledge-check { --knowledge-accent: var(--storage-cyan); }
.data-campaign .lesson-knowledge-check { --knowledge-accent: var(--data-accent); }

.lesson-detail-card .lesson-knowledge-check {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.9rem;
    align-items: stretch;
    min-width: 0;
    overflow: hidden;
    padding: 1.15rem;
    box-shadow: inset 0 3px var(--knowledge-accent), 0 1rem 2.5rem rgba(0, 0, 0, 0.18);
}

.lesson-knowledge-check__heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid color-mix(in srgb, var(--knowledge-accent) 18%, transparent);
}

.lesson-knowledge-check__heading .eyebrow {
    flex-basis: auto;
    margin: 0;
    color: var(--knowledge-accent);
}

.lesson-knowledge-check__heading > span {
    color: #aebfc8;
    font-size: 0.72rem;
    font-weight: 800;
    white-space: nowrap;
}

.lesson-knowledge-check__controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.85rem;
    align-items: end;
    min-width: 0;
}

.lesson-knowledge-check__controls label {
    display: grid;
    gap: 0.5rem;
    min-width: 0;
    font-weight: 800;
}

.lesson-detail-card .lesson-knowledge-check__controls select {
    width: 100%;
    min-width: 0;
    min-height: 48px;
}

.lesson-detail-card .lesson-knowledge-check__controls .card-action {
    align-self: end;
    min-height: 48px;
}

.lesson-detail-card .lesson-knowledge-check > .decision-feedback,
.lesson-knowledge-check__status {
    width: 100%;
    margin: 0;
    border: 1px solid color-mix(in srgb, var(--feedback-accent, var(--knowledge-accent)) 30%, #29445f);
    border-left: 3px solid var(--feedback-accent, var(--knowledge-accent));
    border-radius: 0.75rem;
    background: rgba(8, 24, 36, 0.72);
}

.lesson-detail-card .lesson-knowledge-check > .decision-feedback {
    grid-template-columns: 1.75rem minmax(0, 1fr);
    gap: 0.7rem;
    padding: 0.8rem 0.9rem;
}

.lesson-knowledge-check > .decision-feedback .decision-feedback__icon,
.lesson-knowledge-check__status > span {
    width: 1.75rem;
    height: 1.75rem;
    font-size: 0.85rem;
}

.lesson-knowledge-check > .decision-feedback .decision-feedback__title {
    font-size: 0.92rem;
}

.lesson-knowledge-check > .decision-feedback .decision-feedback__message,
.lesson-knowledge-check > .decision-feedback .decision-feedback__action {
    margin-top: 0.2rem;
    font-size: 0.82rem;
    line-height: 1.45;
}

.lesson-knowledge-check__status {
    display: grid;
    grid-template-columns: 1.75rem minmax(0, 1fr);
    gap: 0.7rem;
    align-items: center;
    box-sizing: border-box;
    color: #c7d4df;
    padding: 0.8rem 0.9rem;
}

.lesson-knowledge-check__status > span {
    display: grid;
    place-items: center;
    border: 1px solid color-mix(in srgb, var(--knowledge-accent) 52%, transparent);
    border-radius: 50%;
    color: var(--knowledge-accent);
    background: color-mix(in srgb, var(--knowledge-accent) 14%, transparent);
    font-weight: 800;
}

.lesson-knowledge-check__status p {
    margin: 0;
    min-width: 0;
    font-size: 0.82rem;
    line-height: 1.45;
    overflow-wrap: anywhere;
}

/* Shared exam brief: readable metadata, deliberate spacing and useful response guidance. */
.exam-checkpoint-brief {
    --exam-accent: #c5a7ff;
    display: grid;
    gap: 0.9rem;
    min-width: 0;
    margin: 0.35rem 0 1rem;
}

.nw-campaign .exam-checkpoint-brief { --exam-accent: var(--nw-violet); }
.pe-campaign .exam-checkpoint-brief { --exam-accent: var(--pe-violet); }
.compression-campaign .exam-checkpoint-brief { --exam-accent: var(--compression-amber); }
.cpu-campaign .exam-checkpoint-brief { --exam-accent: var(--cpu-violet); }
.storage-campaign .exam-checkpoint-brief { --exam-accent: var(--storage-violet); }
.data-campaign .exam-checkpoint-brief { --exam-accent: var(--data-accent-2); }

.exam-command-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
    gap: 0.65rem 0.85rem;
    margin: 0;
}

.exam-command-word,
.exam-mark-count {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    min-height: 2.25rem;
    box-sizing: border-box;
    border-radius: 999px;
    font-weight: 850;
}

.exam-command-word {
    padding: 0.4rem 0.7rem;
    color: #091219;
    background: var(--exam-accent);
}

.exam-command-word small {
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    opacity: 0.72;
    text-transform: uppercase;
}

.exam-command-word strong {
    font-size: 0.86rem;
    text-transform: uppercase;
}

.exam-mark-count {
    padding: 0.4rem 0.75rem;
    border: 1px solid color-mix(in srgb, var(--exam-accent) 48%, transparent);
    color: #f2f7fb;
    background: color-mix(in srgb, var(--exam-accent) 10%, transparent);
}

.exam-mark-count strong {
    color: var(--exam-accent);
    font-size: 1rem;
}

.exam-question {
    margin: 0;
    color: #f3f8fb;
    font-size: clamp(1rem, 1.5vw, 1.12rem);
    line-height: 1.6;
}

.exam-response-guide {
    display: grid;
    gap: 0.55rem;
    min-width: 0;
    padding: 0.85rem 1rem;
    border: 1px solid color-mix(in srgb, var(--exam-accent) 28%, transparent);
    border-left: 3px solid var(--exam-accent);
    border-radius: 0.75rem;
    background: color-mix(in srgb, var(--exam-accent) 7%, rgba(7, 24, 31, 0.88));
}

.exam-response-guide > strong {
    color: var(--exam-accent);
    font-size: 0.9rem;
}

.exam-response-guide ul {
    display: grid;
    gap: 0.35rem;
    margin: 0;
    padding-left: 1.15rem;
    color: #c7d4df;
    font-size: 0.85rem;
    line-height: 1.5;
}

@keyframes decision-feedback-enter {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 390px) {
    .decision-feedback {
        gap: 0.7rem;
        padding: 0.9rem;
    }

    .lesson-detail-card .lesson-knowledge-check {
        padding: 0.85rem;
    }

    .lesson-knowledge-check__heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.25rem;
    }

    .lesson-knowledge-check__heading > span {
        white-space: normal;
    }

    .exam-command-word,
    .exam-mark-count {
        width: 100%;
        justify-content: center;
    }

    .exam-response-guide {
        padding: 0.8rem;
    }
}

@media (max-width: 760px) {
    .lesson-knowledge-check__controls {
        grid-template-columns: minmax(0, 1fr);
    }

    .lesson-detail-card .lesson-knowledge-check__controls .card-action {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 340px) {
    .decision-feedback {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (prefers-reduced-motion: reduce) {
    .decision-feedback {
        animation: none;
    }
}