/* Đề tài NCKH — xanh + điểm vàng */
.nk-section {
    position: relative;
    overflow: hidden;
    background: var(--bg-zone-soft);
    padding: var(--section-y) 0;
}

.nk-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 24px;
    margin-bottom: 36px;
    padding-bottom: 22px;
    border-bottom: 2px solid rgba(0, 65, 144, 0.18);
}

.nk-kicker {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--brand);
    margin: 0 0 8px;
    padding: 3px 8px;
    background: rgba(0, 65, 144, 0.08);
    border-left: 3px solid var(--gold);
}

.nk-title {
    font-family: var(--font-display);
    font-size: clamp(24px, 2.6vw, 34px);
    color: var(--ink);
    margin: 0 0 10px;
    max-width: none;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.nk-desc {
    margin: 0;
    font-size: 16px;
    line-height: 1.5;
    color: var(--ink-soft);
    max-width: none;
    white-space: nowrap;
}

.nk-all {
    flex-shrink: 0;
    display: inline-flex;
    font-size: 14px;
    font-weight: 700;
    color: #fff !important;
    text-decoration: none !important;
    padding: 11px 18px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    background: var(--grad-brand);
    box-shadow: 0 6px 16px rgba(0, 58, 140, 0.2);
    transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.nk-all:hover {
    background: var(--grad-brand-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 22px rgba(0, 58, 140, 0.28);
}

.nk-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.nk-card {
    position: relative;
    background: #fff;
    border: 1px solid rgba(0, 58, 140, 0.12);
    border-radius: var(--radius-lg);
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}
.nk-card:hover {
    box-shadow: 0 14px 32px rgba(0, 65, 144, 0.12);
    transform: translateY(-6px);
    border-color: rgba(232, 163, 23, 0.45);
}

.nk-card-media {
    display: block;
    position: relative;
    width: 100%;
    line-height: 0;
    overflow: hidden;
    background: #ffffff;
    text-decoration: none !important;
}
.nk-card-media img {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
    object-fit: contain;
    object-position: center;
    transition: transform 0.35s ease;
}
.nk-card:hover .nk-card-media img {
    transform: scale(1.02);
}

.nk-card-body {
    padding: 18px 18px 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.nk-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.nk-code {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 800;
    color: var(--ember);
    letter-spacing: 0.04em;
}

.nk-field {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--gold-deep);
    background: rgba(232, 163, 23, 0.16);
    padding: 4px 8px;
    border-radius: var(--radius);
    white-space: nowrap;
}

.nk-name a {
    color: inherit !important;
    text-decoration: none !important;
}
.nk-name a:hover {
    color: var(--brand) !important;
}
.nk-name {
    font-family: var(--font-display);
    font-size: 16px;
    line-height: 1.35;
    color: var(--ink);
    margin: 0 0 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.nk-goal {
    font-size: 13.5px;
    line-height: 1.45;
    color: var(--ink-soft);
    margin: 0 0 14px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.nk-link {
    display: inline-flex;
    align-self: flex-start;
    font-size: 13px;
    font-weight: 700;
    color: #fff !important;
    background: var(--grad-ember);
    border: 1px solid transparent;
    padding: 9px 14px;
    border-radius: var(--radius);
    text-decoration: none !important;
}
.nk-link:hover {
    background: var(--grad-ember-hover);
    color: #fff !important;
}

@media (max-width: 1100px) {
    .nk-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 960px) {
    .nk-grid { grid-template-columns: 1fr; gap: 20px; }
    .nk-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        margin-bottom: 28px;
    }
    .nk-title,
    .nk-desc { white-space: normal; }
    .nk-section { padding: 40px 0; }
}