/* ================================================================
   site.css — Cổng Thông Tin KH&CN Điện Biên
   Viết lại hoàn toàn — chuyên nghiệp, có hệ thống.
   Phiên bản: 2.0
   ================================================================ */

/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */
:root {
    --c-primary:        #C50202;
    --c-primary-dark:   #8E0101;
    --c-primary-light:  #FDECEA;

    --c-accent:         #003087;
    --c-accent-light:   #E8EDF7;

    --c-text:           #1A1A1A;
    --c-text-soft:      #4A4A4A;
    --c-muted:          #777777;
    --c-border:         #E5E5E5;
    --c-border-soft:    #EFEFEF;
    --c-surface:        #FFFFFF;
    --c-surface-soft:   #F8F8F8;
    --c-bg:             #F4F4F4;

    --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px;
    --s-5: 20px; --s-6: 24px; --s-8: 32px; --s-10: 40px;
    --s-12: 48px; --s-16: 64px;

    --fs-xs:    0.75rem;
    --fs-sm:    0.8125rem;
    --fs-base:  0.9375rem;
    --fs-md:    1rem;
    --fs-lg:    1.125rem;
    --fs-xl:    1.375rem;
    --fs-2xl:   1.625rem;

    --r-sm: 4px; --r-md: 6px; --r-lg: 10px;

    --sh-sm: 0 1px 3px rgba(0,0,0,0.06);
    --sh-md: 0 2px 8px rgba(0,0,0,0.08);
    --sh-lg: 0 8px 24px rgba(0,0,0,0.10);

    --max-w:    1600px;
    --header-h: 96px;
    --nav-h:    48px;
    --sidebar-w: 300px;

    --t-fast: 0.15s ease;
    --t-base: 0.25s ease;

    /* Padding ngang nhất quán */
    --px: 24px;
}

/* ============================================================
   2. RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 100%; scroll-behavior: smooth; }
body {
    font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: var(--fs-base);
    line-height: 1.55;
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
}


img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--t-fast); }
button { font: inherit; cursor: pointer; }

/* ============================================================
   3. CONTAINER
   ============================================================ */
.container {
    width: 100%;
    padding: 0 var(--px);
}
@media (max-width: 768px) { .container { padding: 0 var(--px); } }

/* Giới hạn cả background trong vùng content */
.site-frame {
    max-width: 1400px;
    margin: 0 auto;
    overflow-x: clip;
    position: relative;
    box-shadow: 0 0 40px rgba(0,0,0,0.08);
}

/* ============================================================
   4. HEADER
   ============================================================ */
.header {
    background: var(--c-primary);
    box-shadow: 0 2px 8px rgba(142,1,1,0.35);
    border-bottom: 3px solid var(--c-primary-dark);
    position: sticky; top: 0; z-index: 300;
}

.header__inner {
    padding: 0 var(--px);
    height: var(--header-h);
    display: flex; align-items: center; justify-content: space-between;
    gap: var(--s-6);
}
.header__logo {
    display: flex; align-items: center; gap: var(--s-4);
    flex-shrink: 0; min-width: 0;
}
.header__logo-img { height: 70px; width: auto; flex-shrink: 0; }
.header__title { display: flex; flex-direction: column; gap: var(--s-1); min-width: 0; }
.header__ministry {
    font-weight: 800; font-size: clamp(1.1rem, 1.6vw, 1.5rem);
    color: #fff; line-height: 1.2;
    text-transform: uppercase; letter-spacing: 0.5px;
}
.header__portal {
    font-size: clamp(0.8rem, 0.95vw, 0.95rem);
    color: rgba(255,255,255,0.9);
    font-weight: 500; line-height: 1.3;
}
.header__right { display: flex; align-items: center; gap: var(--s-4); flex-shrink: 0; }
.header__clock {
    font-size: var(--fs-sm); color: rgba(255,255,255,0.8); white-space: nowrap;
    padding-left: var(--s-4); border-left: 1px solid rgba(255,255,255,0.25);
}
.header__search {
    display: flex; align-items: center;
    border: 1.5px solid rgba(255,255,255,0.4); border-radius: var(--r-md);
    overflow: hidden; background: rgba(255,255,255,0.15);
    transition: border-color var(--t-fast), background var(--t-fast);
}
.header__search:focus-within {
    border-color: rgba(255,255,255,0.9);
    background: rgba(255,255,255,0.25);
}
.header__search-input {
    border: none; outline: none; padding: 9px 14px;
    font-size: var(--fs-sm); width: 240px;
    background: transparent; font-family: inherit;
    color: #fff;
}
.header__search-input::placeholder { color: rgba(255,255,255,0.65); }
.header__search-btn {
    background: rgba(0,0,0,0.2); border: none; color: #fff;
    padding: 9px 14px; display: flex; align-items: center; justify-content: center;
    transition: background var(--t-fast);
}
.header__search-btn:hover { background: rgba(0,0,0,0.35); }
.header__toggle {
    display: none; background: none; border: none;
    padding: var(--s-2); color: #fff;
}

/* ============================================================
   5. NAV
   ============================================================ */
.nav {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    box-shadow: var(--sh-sm);
    position: sticky; top: var(--header-h); z-index: 299;
    overflow: visible;
}

.nav__list { display: flex; list-style: none; align-items: stretch; height: 100%; }
.nav__link {
    display: flex; align-items: center;
    padding: 0 var(--s-5); height: 100%;
    color: var(--c-text); font-weight: 600;
    font-size: var(--fs-base); white-space: nowrap;
    border-bottom: 3px solid transparent; margin-bottom: -1px;
    transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
    letter-spacing: 0.2px; text-transform: uppercase;
}
.nav__link:hover { color: var(--c-primary); background: var(--c-primary-light); }
.nav__link.active {
    color: var(--c-primary); border-bottom-color: var(--c-primary);
    background: var(--c-primary-light); font-weight: 700;
}
.nav__home-icon {
    font-size: 1.1em; line-height: 1;
    color: var(--c-primary);
    margin-right: 2px;
}

/* ── Dropdown ─────────────────────────────────────────── */
.nav__item {
    position: relative;
    display: flex;
    align-items: stretch;
}

.nav__inner {
    padding: 0; height: var(--nav-h);
    display: flex; align-items: center;
    overflow: visible;
    scrollbar-width: none;
}
.nav__inner::-webkit-scrollbar { display: none; }

.nav__link--has-drop {
    gap: var(--s-1);
}
.nav__link--has-drop .nav__arrow {
    width: 14px; height: 14px; flex-shrink: 0;
    transition: transform var(--t-fast);
    display: flex; align-items: center; justify-content: center;
}
.nav__item:hover .nav__link--has-drop .nav__arrow,
.nav__item.is-open .nav__link--has-drop .nav__arrow { transform: rotate(180deg); }

.nav__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-top: 2px solid var(--c-primary);
    border-radius: 0 0 var(--r-md) var(--r-md);
    box-shadow: var(--sh-lg);
    z-index: 200;
    overflow: hidden;
    /* Ẩn mặc định */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--t-fast), visibility var(--t-fast), transform var(--t-fast);
    pointer-events: none;
}

.nav__item:hover .nav__dropdown,
.nav__item:focus-within .nav__dropdown,
.nav__item.is-open .nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.nav__dropdown-item {
    display: flex; align-items: center;
    padding: var(--s-3) var(--s-4);
    font-size: var(--fs-sm); font-weight: 600;
    color: var(--c-text);
    border-bottom: 1px solid var(--c-border-soft);
    transition: background var(--t-fast), color var(--t-fast), padding-left var(--t-fast);
    white-space: nowrap;
}
.nav__dropdown-item:last-child { border-bottom: none; }
.nav__dropdown-item:hover {
    background: var(--c-primary-light);
    color: var(--c-primary);
    padding-left: calc(var(--s-4) + 6px);
}
.nav__dropdown-item.active {
    color: var(--c-primary); font-weight: 700;
    background: var(--c-primary-light);
}

/* Mobile dropdown */
@media (max-width: 768px) {
    .nav__item { flex-direction: column; align-items: stretch; }
    .nav__dropdown {
        position: static;
        opacity: 1; visibility: visible;
        transform: none; pointer-events: auto;
        box-shadow: none; border: none;
        border-top: none;
        border-left: 3px solid var(--c-primary);
        border-radius: 0;
        background: var(--c-surface-soft);
        display: none;
    }
    .nav__item.is-open .nav__dropdown { display: block; }
    .nav__dropdown-item { padding-left: var(--s-8); }
    .nav__link--has-drop { justify-content: space-between; }
}

/* ============================================================
   6. BANNER
   ============================================================ */
.banner-wrap { background: #fff; }
.banner {
    position: relative;
    max-width: calc(var(--max-w) - var(--px) * 2);
    margin: 0 auto;
    width: 100%;
    aspect-ratio: 21 / 7; max-height: 400px; min-height: 220px;
    overflow: hidden;
}
.banner__slide {
    position: absolute; inset: 0;
    opacity: 0; transition: opacity 0.6s ease;
}
.banner__slide.active { opacity: 1; z-index: 1; }
.banner__slide img,
.banner__slide-placeholder { width: 100%; height: 100%; object-fit: cover; }
.banner__slide-placeholder { background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary)); }
.banner__caption {
    position: absolute; left: 0; right: 0; bottom: 0;
    padding: var(--s-12) var(--s-8) var(--s-6);
    background: linear-gradient(to top, rgba(0,0,0,0.82), rgba(0,0,0,0.4) 60%, transparent);
    z-index: 2;
}
.banner__caption-title {
    font-size: clamp(1.1rem, 2vw, 1.6rem);
    font-weight: 700; line-height: 1.35; color: #fff;
    max-width: 80%; text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}
.banner__prev, .banner__next {
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 44px; height: 44px; border-radius: 50%;
    background: rgba(0,0,0,0.4); border: none; color: #fff;
    font-size: 1.2rem; z-index: 3;
    display: flex; align-items: center; justify-content: center;
    transition: background var(--t-fast);
}
.banner__prev { left: var(--s-4); }
.banner__next { right: var(--s-4); }
.banner__prev:hover, .banner__next:hover { background: var(--c-primary); }
.banner__dots {
    position: absolute; bottom: var(--s-4); left: 50%; transform: translateX(-50%);
    display: flex; gap: var(--s-2); z-index: 3;
}
.banner__dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: rgba(255,255,255,0.4); cursor: pointer;
    transition: background var(--t-fast), width var(--t-fast);
}
.banner__dot.active { background: #fff; width: 28px; border-radius: 5px; }

/* ============================================================
   7. SLOGAN
   ============================================================ */
.slogan-bar {
    background: var(--c-bg);
    overflow: hidden;
}
.slogan-bar__inner-wrap {
    max-width: calc(var(--max-w) - var(--px) * 2);
    margin: 0 auto;
    background: var(--c-primary);
    overflow: hidden;
}

.slogan-bar__inner {
    display: flex; white-space: nowrap;
    animation: slogan-scroll 15s linear infinite;
    padding: var(--s-3) 0;
}
.slogan-bar__inner:hover { animation-play-state: paused; }
.slogan-bar__item {
    padding: 0 var(--s-10); font-size: 0.875rem;
    font-weight: 500; letter-spacing: 0.2px;
    display: inline-flex; align-items: center; gap: var(--s-2);
    color: #ffffff;
}
.slogan-bar__item::before {
    content: ""; width: 6px; height: 6px; border-radius: 50%;
    background: rgba(255,255,255,0.7); flex-shrink: 0;
}
@media (max-width: 480px) { .slogan-bar { display: none; } }
@keyframes slogan-scroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

/* ============================================================
   8. SHORTCUTS (6 ô chuyên mục)
   ============================================================ */
.shortcuts {
    padding: var(--s-5) 0;
    background: var(--c-bg);
}
.shortcuts__label {
    font-size: var(--fs-sm); color: var(--c-muted);
    text-transform: uppercase; letter-spacing: 0.5px;
    margin-bottom: var(--s-4); font-weight: 600;
}
.shortcuts__grid {
    display: grid; grid-template-columns: repeat(6, 1fr);
    gap: var(--s-3);
}
.shortcuts__item {
    position: relative; height: 120px;
    border-radius: var(--r-md); overflow: hidden;
    background-size: cover; background-position: center;
    box-shadow: var(--sh-sm); display: block;
    transition: transform var(--t-base), box-shadow var(--t-base);
}
.shortcuts__item:hover {
    transform: translateY(-3px); box-shadow: var(--sh-lg);
}
.shortcuts__item:nth-child(1) { background-color: #7A1A1A; }
.shortcuts__item:nth-child(2) { background-color: #1A3A6B; }
.shortcuts__item:nth-child(3) { background-color: #1F5C2E; }
.shortcuts__item:nth-child(4) { background-color: #5C3A00; }
.shortcuts__item:nth-child(5) { background-color: #3A1F5C; }
.shortcuts__item:nth-child(6) { background-color: #00455C; }
/* Overlay đen mặc định */
.shortcuts__overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85), rgba(0,0,0,0.3) 60%, rgba(0,0,0,0.1));
}

.shortcuts__content {
    position: absolute; inset: 0; padding: var(--s-3);
    display: flex; flex-direction: column; justify-content: flex-end;
    color: #fff; z-index: 1;
}
.shortcuts__title {
    font-size: var(--fs-base); font-weight: 700;
    line-height: 1.3; text-shadow: 0 1px 3px rgba(0,0,0,0.6);
}
@media (max-width: 1024px) { .shortcuts__grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px)  { .shortcuts__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 400px)  { .shortcuts__grid { grid-template-columns: 1fr; } }

/* ============================================================
   9. MAIN LAYOUT
   ============================================================ */
.main { padding: var(--s-8) 0 var(--s-12); }
.main__grid {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-w);
    gap: var(--s-8);
}
.main__content { min-width: 0; }
.main__content > * + * { margin-top: var(--s-10); }
.main__full { grid-column: 1 / -1; }
@media (max-width: 960px) { .main__grid { grid-template-columns: 1fr; } }

/* ============================================================
   10. SECTION TITLE
   ============================================================ */
.s-title {
    display: flex; align-items: center; gap: var(--s-3);
    margin-bottom: var(--s-5); padding-bottom: var(--s-3);
    border-bottom: 2px solid var(--c-border);
    position: relative;
}
.s-title__text {
    font-size: var(--fs-xl); font-weight: 800;
    color: var(--c-primary); text-transform: uppercase;
    letter-spacing: 0.5px; line-height: 1; position: relative;
}
.s-title__text::after {
    content: ""; position: absolute;
    bottom: calc(var(--s-3) * -1 - 2px); left: 0; right: 0;
    height: 2px; background: var(--c-primary);
}
.s-title__more {
    margin-left: auto; font-size: var(--fs-sm);
    color: var(--c-primary); font-weight: 600;
    display: inline-flex; align-items: center; gap: var(--s-1);
    transition: gap var(--t-fast);
}
.s-title__more:hover { color: var(--c-primary-dark); gap: var(--s-2); }

/* ============================================================
   11. FEATURED
   ============================================================ */

/* Wrapper tổng — card liền khối, chiều cao cố định */
.featured {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    height: 420px;
    border-radius: var(--r-md);
    overflow: hidden;
    box-shadow: var(--sh-md);
    background: var(--c-surface);
}

/* === BÀI CHÍNH === */
.featured__main {
    display: flex;
    flex-direction: column;
    height: 100%;
    border-right: 1px solid var(--c-border);
    text-decoration: none; color: inherit;
    overflow: hidden;
}

.featured__main-img {
    flex: 1;
    overflow: hidden;
    background: #eee;
}
.featured__main-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}
.featured__main:hover .featured__main-img img { transform: scale(1.03); }

.featured__main-body {
    flex-shrink: 0;
    padding: var(--s-3) var(--s-4);
    border-top: 1px solid var(--c-border-soft);
    background: var(--c-surface);
}
.featured__main-cat {
    font-size: var(--fs-xs); font-weight: 700;
    color: var(--c-primary); text-transform: uppercase;
    letter-spacing: 0.5px; display: block;
    margin-bottom: var(--s-1);
}
.featured__main-title {
    font-size: var(--fs-md); font-weight: 700;
    line-height: 1.35; color: var(--c-text);
    margin-bottom: var(--s-1);
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    transition: color var(--t-fast);
}
.featured__main:hover .featured__main-title { color: var(--c-primary); }
.featured__main-excerpt {
    font-size: var(--fs-sm); color: var(--c-text-soft);
    line-height: 1.5; margin-bottom: var(--s-1);
    display: -webkit-box; -webkit-line-clamp: 1;
    -webkit-box-orient: vertical; overflow: hidden;
}
.featured__main-meta {
    font-size: var(--fs-xs); color: var(--c-muted);
    display: flex; gap: var(--s-2);
}

/* === CỘT PHẢI — tin nhỏ cuộn === */
.featured__side {
    height: 100%;
    overflow: hidden;
    position: relative;
}

/* Gradient mờ báo hiệu còn nội dung */
.featured__side::after {
    content: "";
    position: absolute; bottom: 0; left: 0; right: 0;
    height: 36px;
    background: linear-gradient(to top, rgba(255,255,255,1) 0%, transparent 100%);
    pointer-events: none; z-index: 2;
}

.featured__side-track {
    display: flex;
    flex-direction: column;
    animation: featured-scroll 20s linear infinite;
}
.featured__side-track:hover { animation-play-state: paused; }

@keyframes featured-scroll {
    0%   { transform: translateY(0); }
    100% { transform: translateY(-50%); }
}

.featured__side-item {
    display: grid;
    grid-template-columns: 84px 1fr;
    text-decoration: none; color: inherit;
    border-bottom: 1px solid var(--c-border-soft);
    transition: background var(--t-fast);
}
.featured__side-item:hover { background: var(--c-surface-soft); }

/* Ảnh: kích thước cứng, không bao giờ thay đổi */
.featured__side-thumb {
    width: 84px;
    height: 72px;
    flex-shrink: 0;
    overflow: hidden;
    background: #eee;
}
.featured__side-thumb img {
    width: 84px;
    height: 72px;
    object-fit: cover;
    display: block;
    transition: transform 0.4s;
}
.featured__side-item:hover .featured__side-thumb img { transform: scale(1.06); }

/* Nội dung */
.featured__side-body {
    padding: 10px 12px;
    display: flex; flex-direction: column;
    justify-content: center; gap: 3px;
    min-width: 0; overflow: hidden;
}
.featured__side-cat {
    font-size: 0.6rem; font-weight: 700;
    color: var(--c-primary); text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.featured__side-title {
    font-size: 0.8rem; font-weight: 600;
    line-height: 1.4; color: var(--c-text);
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
}
.featured__side-item:hover .featured__side-title { color: var(--c-primary); }
.featured__side-meta {
    font-size: 0.65rem; color: var(--c-muted);
}

@media (max-width: 900px) {
    .featured { height: auto; grid-template-columns: 1fr; }
    .featured__main-img { height: 260px; flex: none; }
    .featured__side { height: 280px; }
    .featured__side-track { animation: none; }
}

/* ============================================================
      12. CARDS
   ============================================================ */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-5); }
.card {
    background: var(--c-surface); border-radius: var(--r-md);
    overflow: hidden; box-shadow: var(--sh-sm);
    display: flex; flex-direction: column;
    transition: transform var(--t-base), box-shadow var(--t-base);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--sh-lg); }
.card__media {
    aspect-ratio: 16/9; overflow: hidden; background: var(--c-surface-soft);
}
.card__media img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.4s ease;
}
.card:hover .card__media img { transform: scale(1.05); }
.card__body {
    padding: var(--s-4); display: flex; flex-direction: column;
    flex: 1; gap: var(--s-2);
}
.card__cat {
    font-size: var(--fs-xs); font-weight: 700;
    color: var(--c-primary); text-transform: uppercase; letter-spacing: 0.4px;
}
.card__title {
    font-size: var(--fs-base); font-weight: 700;
    line-height: 1.4; color: var(--c-text);
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
}
.card:hover .card__title { color: var(--c-primary); }
.card__excerpt {
    font-size: var(--fs-sm); color: var(--c-text-soft);
    line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden; flex: 1;
}
.card__meta {
    font-size: var(--fs-xs); color: var(--c-muted);
    padding-top: var(--s-2); border-top: 1px solid var(--c-border-soft);
    margin-top: auto;
}
@media (max-width: 900px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } }

/* ============================================================
   13. BUTTONS
   ============================================================ */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: var(--s-2); padding: var(--s-2) var(--s-4);
    border-radius: var(--r-sm); font-size: var(--fs-sm);
    font-weight: 600; border: 1px solid transparent;
    cursor: pointer; text-decoration: none;
    transition: all var(--t-fast); white-space: nowrap;
}
.btn--sm { padding: 6px 12px; font-size: var(--fs-xs); }
.btn--primary {
    background: var(--c-primary); color: #fff; border-color: var(--c-primary);
}
.btn--primary:hover {
    background: var(--c-primary-dark); border-color: var(--c-primary-dark);
}
.btn--outline {
    background: transparent; color: var(--c-primary); border-color: var(--c-primary);
}
.btn--outline:hover { background: var(--c-primary); color: #fff; }
.btn--ghost {
    background: transparent; color: var(--c-text-soft); border-color: var(--c-border);
}
.btn--ghost:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ============================================================
   14. DOCS TABLE
   ============================================================ */
.docs {
    background: var(--c-surface); border-radius: var(--r-md);
    overflow: hidden; box-shadow: var(--sh-sm);
}
.docs__head {
    background: var(--c-primary); color: #fff;
    padding: var(--s-3) var(--s-4); display: flex;
    align-items: center; gap: var(--s-2);
    font-size: var(--fs-md); font-weight: 700;
}
.docs__head-more {
    margin-left: auto; font-size: var(--fs-sm); font-weight: 500;
    color: #fff; opacity: 0.95;
}
.docs__head-more:hover { opacity: 1; text-decoration: underline; }
.docs__table-wrap { overflow-x: auto; }
.docs__table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.docs__table th {
    background: var(--c-surface-soft); padding: var(--s-3);
    text-align: left; font-weight: 700; color: var(--c-text);
    border-bottom: 2px solid var(--c-border); white-space: nowrap;
}
.docs__table td {
    padding: var(--s-3); border-bottom: 1px solid var(--c-border-soft);
    color: var(--c-text-soft); vertical-align: middle;
}
.docs__table tr:last-child td { border-bottom: none; }
.docs__table tr:hover td { background: var(--c-surface-soft); }
.docs__title a { color: var(--c-text); font-weight: 600; }
.docs__title a:hover { color: var(--c-primary); }
.docs__type {
    display: inline-block; padding: 2px 8px;
    border-radius: var(--r-sm); font-size: 0.7rem;
    font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.3px; background: var(--c-muted); color: #fff;
}
.docs__type.pdf  { background: #D32F2F; }
.docs__type.docx { background: #1565C0; }
.docs__type.xlsx { background: #2E7D32; }
.docs__type.pptx { background: #E65100; }
.docs__actions { display: flex; gap: var(--s-1); white-space: nowrap; }

/* ============================================================
   15. SIDEBAR
   ============================================================ */
.sidebar { display: flex; flex-direction: column; gap: var(--s-5); position: sticky; top: calc(var(--header-h) + var(--nav-h) + var(--s-4)); align-self: start; z-index: 1; }
.sidebar__block {
    background: var(--c-surface); border-radius: var(--r-md);
    overflow: hidden; box-shadow: var(--sh-sm);
}
.sidebar__block-head {
    background: var(--c-primary); color: #fff;
    padding: var(--s-3) var(--s-4); font-size: var(--fs-base);
    font-weight: 700; display: flex; align-items: center; gap: var(--s-2);
}
.sidebar__block-body { padding: var(--s-4); }
.sidebar__list { list-style: none; display: flex; flex-direction: column; gap: var(--s-3); }
.sidebar__list li {
    display: flex; flex-direction: column; gap: var(--s-1);
    padding-bottom: var(--s-3); border-bottom: 1px solid var(--c-border-soft);
}
.sidebar__list li:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar__list a {
    font-size: var(--fs-sm); font-weight: 600;
    color: var(--c-text); line-height: 1.4;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
}
.sidebar__list a:hover { color: var(--c-primary); }
.sidebar__list time { font-size: var(--fs-xs); color: var(--c-muted); }

/* Sidebar liên kết ngoài */
.sidebar__links { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.sidebar__links li a {
    display: flex; align-items: center; gap: var(--s-2);
    font-size: var(--fs-sm); color: var(--c-text-soft);
    padding: var(--s-2) var(--s-2);
    border-radius: var(--r-sm);
    transition: all var(--t-fast); line-height: 1.4;
}
.sidebar__links li a::before {
    content: ""; width: 6px; height: 6px; border-radius: 50%;
    background: var(--c-primary); flex-shrink: 0; opacity: 0.5;
    transition: opacity var(--t-fast);
}
.sidebar__links li a:hover {
    color: var(--c-primary); background: var(--c-primary-light);
    padding-left: var(--s-3);
}
.sidebar__links li a:hover::before { opacity: 1; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: var(--s-1); }
.tag {
    display: inline-block; font-size: var(--fs-xs);
    padding: 4px 10px; background: var(--c-surface-soft);
    color: var(--c-text-soft); border-radius: 999px;
    border: 1px solid var(--c-border); transition: all var(--t-fast);
}
.tag:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.sidebar__footer { margin-top: var(--s-3); text-align: right; }
.empty {
    font-size: var(--fs-sm); color: var(--c-muted);
    padding: var(--s-3) 0; text-align: center;
}

/* ============================================================
   16. FOOTER
   ============================================================ */
/* ── Category row layout ──────────────────────── */
.cat-row {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--s-5);
    align-items: stretch;
}
.cat-row__main {
    display: flex; flex-direction: column;
    border-radius: var(--r-md); overflow: hidden;
    background: var(--c-surface); box-shadow: var(--sh-sm);
    text-decoration: none; color: inherit;
    transition: transform var(--t-base), box-shadow var(--t-base);
    height: 100%;
}
.cat-row__main:hover { transform: translateY(-2px); box-shadow: var(--sh-lg); }
.cat-row__main-img {
    height: 200px;
    flex-shrink: 0;
    overflow: hidden; background: var(--c-surface-soft);
}
.cat-row__main-img img {
    width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s;
}
.cat-row__main:hover .cat-row__main-img img { transform: scale(1.04); }
.cat-row__main-body {
    padding: var(--s-3) var(--s-4);
    display: flex; flex-direction: column; gap: var(--s-1);
    flex: 1;
}
.cat-row__main-title {
    font-size: var(--fs-base); font-weight: 700;
    line-height: 1.4; color: var(--c-text);
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    transition: color var(--t-fast);
}
.cat-row__main:hover .cat-row__main-title { color: var(--c-primary); }
.cat-row__main-date { font-size: var(--fs-xs); color: var(--c-muted); }

.cat-row__side {
    display: flex; flex-direction: column;
    background: var(--c-surface); border-radius: var(--r-md);
    overflow: hidden; box-shadow: var(--sh-sm);
    height: 100%;
}
.cat-row__side-item {
    display: grid;
    grid-template-columns: 88px 1fr;
    gap: 0;
    border-bottom: 1px solid var(--c-border-soft);
    text-decoration: none; color: inherit;
    transition: background var(--t-fast);
    flex: 1;
}
.cat-row__side-item:last-child { border-bottom: none; }
.cat-row__side-item:hover { background: var(--c-surface-soft); }

.cat-row__side-thumb {
    width: 88px; height: 100%;
    min-height: 72px;
    overflow: hidden; background: var(--c-surface-soft); flex-shrink: 0;
}
.cat-row__side-thumb img {
    width: 88px; height: 100%; min-height: 72px;
    object-fit: cover; display: block;
    transition: transform 0.4s;
}
.cat-row__side-item:hover .cat-row__side-thumb img { transform: scale(1.06); }

.cat-row__side-body {
    padding: var(--s-3) var(--s-3);
    display: flex; flex-direction: column;
    justify-content: center; gap: 3px;
    min-width: 0;
}
.cat-row__side-title {
    font-size: var(--fs-sm); font-weight: 600;
    line-height: 1.4; color: var(--c-text);
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    transition: color var(--t-fast);
}
.cat-row__side-item:hover .cat-row__side-title { color: var(--c-primary); }
.cat-row__side-date { font-size: var(--fs-xs); color: var(--c-muted); }

@@media (max-width: 768px) { .cat-row { grid-template-columns: 1fr; } }

/* ── Home docs grid ─────────────────────────── */
.home-docs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--s-4);
}
.home-docs-card {
    display: flex; flex-direction: column;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--r-md);
    overflow: hidden;
    text-decoration: none; color: inherit;
    box-shadow: var(--sh-sm);
    height: 100%;
    transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}
.home-docs-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--sh-lg);
    border-color: var(--c-primary);
}
.home-docs-card__icon {
    padding: var(--s-5) var(--s-5) var(--s-3);
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
    color: rgba(255,255,255,0.9);
}
.home-docs-card__body {
    padding: var(--s-3) var(--s-5); flex: 1;
    display: flex; flex-direction: column; gap: var(--s-1);
}
.home-docs-card__title {
    font-size: var(--fs-base); font-weight: 800;
    color: var(--c-text); line-height: 1.35;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    transition: color var(--t-fast);
}
.home-docs-card:hover .home-docs-card__title { color: var(--c-primary); }
.home-docs-card__desc {
    font-size: var(--fs-xs); color: var(--c-muted);
    line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
}
.home-docs-card__footer {
    display: flex; align-items: center; justify-content: space-between;
    padding: var(--s-2) var(--s-5) var(--s-3);
    margin-top: auto;
    border-top: 1px solid var(--c-border-soft);
}
.home-docs-card__count {
    font-size: var(--fs-xs); font-weight: 600; color: var(--c-muted);
}
.home-docs-card__arrow {
    font-size: var(--fs-sm); color: var(--c-primary);
    opacity: 0; transform: translateX(-4px);
    transition: opacity var(--t-fast), transform var(--t-fast);
}
.home-docs-card:hover .home-docs-card__arrow { opacity: 1; transform: translateX(0); }
@media (max-width: 768px) { .home-docs-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .home-docs-grid { grid-template-columns: 1fr; } }

.footer {
    background: var(--c-primary-dark);
    color: #fff;
    margin-top: var(--s-12);
}
.footer__inner {
    padding: var(--s-10) var(--px);
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--s-8);
}
.footer__col h4 {
    font-size: var(--fs-md); font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.5px;
    margin-bottom: var(--s-4); padding-bottom: var(--s-2);
    border-bottom: 1px solid rgba(255,255,255,0.2);
}
.footer__info p {
    font-size: var(--fs-sm); line-height: 1.7;
    color: rgba(255,255,255,0.9);
}
.footer__links {
    list-style: none; display: flex; flex-direction: column; gap: var(--s-2);
}
.footer__links a {
    font-size: var(--fs-sm); color: rgba(255,255,255,0.9);
    transition: color var(--t-fast), padding-left var(--t-fast);
}
.footer__links a::before { content: "› "; opacity: 0.6; }
.footer__links a:hover { color: #fff; padding-left: 4px; }
.footer__bottom {
    border-top: 1px solid rgba(255,255,255,0.15);
    background: rgba(0,0,0,0.2);
}
.footer__bottom-inner {
    padding: var(--s-3) var(--px);
    display: flex; justify-content: space-between;
    align-items: center; flex-wrap: wrap; gap: var(--s-2);
    font-size: var(--fs-xs); color: rgba(255,255,255,0.75);
}
.footer__bottom-inner a { color: rgba(255,255,255,0.85); }
.footer__bottom-inner a:hover { color: #fff; text-decoration: underline; }
@media (max-width: 900px) { .footer__inner { grid-template-columns: 1fr 1fr; gap: var(--s-6); } }
@media (max-width: 560px) { .footer__inner { grid-template-columns: 1fr; } }

/* ============================================================
   17. ARTICLE / DETAIL
   ============================================================ */
.breadcrumb { font-size: var(--fs-sm); color: var(--c-muted); margin-bottom: var(--s-4); }
.breadcrumb a { color: var(--c-primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb__sep { margin: 0 var(--s-1); opacity: 0.5; }

/* Art — trang nội dung tĩnh (giới thiệu, liên hệ...) */
.art {
    background: var(--c-surface);
    border-radius: var(--r-md);
    box-shadow: var(--sh-sm);
    padding: var(--s-8);
}
.art__header {
    border-bottom: 2px solid var(--c-primary);
    padding-bottom: var(--s-4);
    margin-bottom: var(--s-6);
}
.art__title {
    font-size: var(--fs-2xl);
    font-weight: 800;
    color: var(--c-text);
    line-height: 1.3;
}
.art__body {
    font-size: var(--fs-md);
    line-height: 1.8;
    color: var(--c-text-soft);
}
.art__body > * + * { margin-top: var(--s-4); }
.art__body h2 {
    font-size: var(--fs-xl); font-weight: 700;
    color: var(--c-text); margin-top: var(--s-6);
}
.art__body h3 {
    font-size: var(--fs-lg); font-weight: 700;
    color: var(--c-text); margin-top: var(--s-5);
}
.art__body p { color: var(--c-text-soft); }
.art__body ul, .art__body ol {
    padding-left: var(--s-6);
    display: flex; flex-direction: column; gap: var(--s-2);
}
.art__body li { color: var(--c-text-soft); }
.art__body a { color: var(--c-primary); text-decoration: underline; }
.art__body img {
    max-width: 100%; height: auto;
    border-radius: var(--r-sm);
    box-shadow: var(--sh-sm);
    margin: var(--s-4) auto;
}
.art__body table {
    width: 100%; border-collapse: collapse;
    font-size: var(--fs-sm);
}
.art__body table th {
    background: var(--c-primary); color: #fff;
    padding: var(--s-3); text-align: left; font-weight: 700;
}
.art__body table td {
    padding: var(--s-3);
    border-bottom: 1px solid var(--c-border-soft);
    color: var(--c-text-soft);
}
.art__body table tr:hover td { background: var(--c-surface-soft); }
.article__header {
    border-bottom: 1px solid var(--c-border);
    padding-bottom: var(--s-4); margin-bottom: var(--s-5);
}
.article__cat {
    display: inline-block; font-size: var(--fs-xs); font-weight: 700;
    color: var(--c-primary); text-transform: uppercase;
    letter-spacing: 0.5px; margin-bottom: var(--s-2);
}
.article__title {
    font-size: var(--fs-2xl); font-weight: 800;
    line-height: 1.3; color: var(--c-text); margin-bottom: var(--s-3);
}
.article__meta { display: flex; gap: var(--s-4); font-size: var(--fs-sm); color: var(--c-muted); }
.article__summary {
    padding: var(--s-4); background: var(--c-surface-soft);
    border-left: 4px solid var(--c-primary);
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    font-size: var(--fs-md); color: var(--c-text-soft);
    line-height: 1.65; margin-bottom: var(--s-5); font-style: italic;
}
.article__hero {
    margin-bottom: var(--s-5); border-radius: var(--r-md);
    overflow: hidden; box-shadow: var(--sh-md);
}
.article__hero img { width: 100%; height: auto; display: block; }
.article__content { font-size: var(--fs-md); line-height: 1.75; color: var(--c-text); }
.article__content > * + * { margin-top: var(--s-3); }
.article__content h2, .article__content h3 {
    margin-top: var(--s-6); margin-bottom: var(--s-2);
    color: var(--c-text); font-weight: 700;
}
.article__content h2 { font-size: var(--fs-lg); }
.article__content h3 { font-size: var(--fs-md); }
.article__content p { color: var(--c-text-soft); }
.article__content img {
    max-width: 100%; height: auto; margin: var(--s-4) auto;
    border-radius: var(--r-sm); box-shadow: var(--sh-sm);
}
.article__tags {
    margin-top: var(--s-6); padding-top: var(--s-4);
    border-top: 1px solid var(--c-border);
    display: flex; align-items: center; flex-wrap: wrap; gap: var(--s-2);
}
.article__tags-label {
    font-size: var(--fs-xs); font-weight: 700;
    color: var(--c-muted); text-transform: uppercase; letter-spacing: 0.5px;
}

/* ============================================================
   18. TABS, PAGINATION, STATUS
   ============================================================ */
.tabs { display: flex; flex-wrap: wrap; gap: var(--s-2); margin-bottom: var(--s-5); }
.tab {
    padding: 6px 14px; background: var(--c-surface);
    border: 1px solid var(--c-border); border-radius: var(--r-sm);
    font-size: var(--fs-sm); font-weight: 600;
    color: var(--c-text-soft); transition: all var(--t-fast);
}
.tab:hover { border-color: var(--c-primary); color: var(--c-primary); }
.tab.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

.pagination {
    display: flex; justify-content: center; gap: var(--s-1);
    margin-top: var(--s-6); flex-wrap: wrap;
}
.pagination a, .pagination span {
    min-width: 36px; height: 36px; padding: 0 var(--s-2);
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--c-surface); border: 1px solid var(--c-border);
    border-radius: var(--r-sm); color: var(--c-text-soft);
    font-size: var(--fs-sm); font-weight: 600;
    transition: all var(--t-fast);
}
.pagination a:hover { border-color: var(--c-primary); color: var(--c-primary); }
.pagination .active {
    background: var(--c-primary); color: #fff; border-color: var(--c-primary);
}

.status {
    display: inline-block; font-size: var(--fs-xs);
    font-weight: 700; padding: 3px 10px; border-radius: 999px;
    text-transform: uppercase; letter-spacing: 0.4px;
}
.status--research { background: #E3F2FD; color: #1565C0; }
.status--pilot    { background: #FFF3E0; color: #E65100; }
.status--deploy   { background: #E8F5E9; color: #2E7D32; }

/* ============================================================
   19. GALLERY HOME
   ============================================================ */
.gallery-home {
    background: var(--c-surface); border-radius: var(--r-md);
    overflow: hidden; box-shadow: var(--sh-sm);
}
.gallery-home__set { display: none; }
.gallery-home__set.active { display: block; }
.gallery-home__layout {
    display: grid; grid-template-columns: 180px 1fr 180px;
    gap: 6px; padding: 6px; background: var(--c-bg);
}
.gallery-home__side { display: flex; flex-direction: column; gap: 6px; }
.gallery-home__thumb {
    flex: 1; min-height: 90px; overflow: hidden;
    border-radius: var(--r-sm); cursor: pointer;
    background: var(--c-surface-soft);
    border: 2px solid transparent; opacity: 0.7;
    transition: opacity var(--t-fast), border-color var(--t-fast);
}
.gallery-home__thumb img { width: 100%; height: 100%; object-fit: cover; }
.gallery-home__thumb:hover, .gallery-home__thumb.active {
    opacity: 1; border-color: var(--c-primary);
}
.gallery-home__main {
    position: relative; overflow: hidden;
    border-radius: var(--r-sm); background: #111; min-height: 320px;
}
.gallery-home__main-img {
    position: absolute; inset: 0;
    width: 100%; height: 100%; object-fit: cover;
    opacity: 0; transition: opacity 0.4s ease; cursor: pointer;
}
.gallery-home__main-img.active { opacity: 1; }
.gallery-home__main-info {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: var(--s-5) var(--s-4) var(--s-3);
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    display: flex; justify-content: space-between;
    align-items: flex-end; z-index: 1;
}
.gallery-home__date { color: rgba(255,255,255,0.85); font-size: var(--fs-xs); }
.gallery-home__view {
    background: var(--c-primary); color: #fff;
    padding: 4px 12px; border-radius: var(--r-sm);
    font-size: var(--fs-xs); font-weight: 600;
}
.gallery-home__view:hover { background: var(--c-primary-dark); }
.gallery-home__footer {
    padding: var(--s-3) var(--s-4);
    background: var(--c-surface-soft);
    border-top: 1px solid var(--c-border);
    display: flex; justify-content: space-between;
    align-items: center; gap: var(--s-3); flex-wrap: wrap;
}
.gallery-home__title {
    font-size: var(--fs-md); font-weight: 700;
    color: var(--c-text); flex: 1; min-width: 0;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.gallery-home__nav { display: flex; align-items: center; gap: var(--s-2); }
.gallery-home__nav-btn {
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--c-surface); border: 1px solid var(--c-border);
    color: var(--c-text-soft);
    display: flex; align-items: center; justify-content: center;
    transition: all var(--t-fast);
}
.gallery-home__nav-btn:hover {
    background: var(--c-primary); border-color: var(--c-primary); color: #fff;
}
.gallery-home__dots { display: flex; gap: 5px; align-items: center; }
.gallery-home__dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--c-border); cursor: pointer; transition: all var(--t-fast);
}
.gallery-home__dot.active {
    background: var(--c-primary); width: 22px; border-radius: 4px;
}
.gallery-home__set-nav {
    padding: var(--s-3); background: var(--c-surface);
    border-top: 1px solid var(--c-border);
    display: flex; justify-content: center; align-items: center; gap: var(--s-4);
}
@media (max-width: 768px) {
    .gallery-home__layout { grid-template-columns: 80px 1fr 80px; }
    .gallery-home__thumb { min-height: 60px; }
    .gallery-home__main { min-height: 220px; }
}
@media (max-width: 480px) {
    .gallery-home__layout { grid-template-columns: 60px 1fr 60px; }
}

/* ============================================================
   20. RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    :root { --header-h: 80px; --sidebar-w: 280px; }
    .header__search-input { width: 180px; }
    .header__clock { display: none; }
}
@media (max-width: 768px) {
    :root { --header-h: 64px; --nav-h: 44px; }
    .header__inner { padding: 0 var(--s-3); gap: var(--s-2); flex-wrap: nowrap; }
    .header__logo { flex: 1; min-width: 0; overflow: hidden; }
    .header__logo-img { height: 40px; flex-shrink: 0; }
    .header__title { min-width: 0; overflow: hidden; }
    .header__ministry { font-size: 0.72rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .header__portal { font-size: 0.65rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .header__search, .header__clock, .header__right { display: none; }
    .header__toggle { display: flex; flex-shrink: 0; margin-left: auto; }
    .nav { position: static; }
    .nav__inner {
        padding: 0; height: auto; flex-direction: column;
        max-height: 0; overflow: hidden; transition: max-height var(--t-base);
    }
    .nav.is-open .nav__inner { max-height: 100vh; padding: var(--s-2) 0; }
    .nav__list { flex-direction: column; width: 100%; }
    .nav__link {
        padding: var(--s-3) var(--s-4); height: auto;
        border-bottom: 1px solid var(--c-border-soft);
        margin-bottom: 0; width: 100%;
    }
    .featured { grid-template-columns: 1fr; }
    .main__grid { gap: var(--s-5); }
}

.hamburger, .hamburger::before, .hamburger::after {
    content: ""; display: block;
    width: 22px; height: 2px;
    background: var(--c-text); border-radius: 2px;
    transition: all var(--t-fast);
}
.hamburger { position: relative; }
.hamburger::before { position: absolute; top: -7px; }
.hamburger::after  { position: absolute; top: 7px; }

/* PDF badge trên card homepage */
.cat-row__main-img,
.cat-row__side-thumb { position: relative; }
.home-pdf-badge {
    position: absolute; top: 8px; left: 8px;
    background: var(--c-primary); color: #fff;
    font-size: 10px; font-weight: 700;
    padding: 2px 7px; border-radius: 3px;
    letter-spacing: 0.5px; pointer-events: none;
    z-index: 2;
}