/* =========================================================
   Giao diện kiểu EAU Congress — VSOT
   ========================================================= */

:root {
    --font-primary: "Roboto", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    --font-secondary: "League Spartan", "Spartan", "Helvetica Neue", Arial, sans-serif;

    --color-darkest: #152443;
    --color-lightest: #fff;
    --color-primary: #fe6b2e;
    --color-primary-light: #fe8b5b;
    --color-primary-dark: #e04201;
    --color-secondary: #65abdc;
    --color-secondary-light: #ebf6fd;

    --color-gray-100: #fdfdfe;
    --color-gray-200: #f3f3f6;
    --color-gray-300: #d6d6d6;
    --color-gray-500: #707070;

    --radius-sm: .625rem;
    --radius-md: 1rem;
    --radius-pill: 50px;

    --shadow-light: 0 0 8px rgba(0, 0, 0, .06);
    --shadow-medium: 0 0 6px rgba(0, 0, 0, .16);

    --gap-sm: 1.5rem;
    --gap-md: 3.125rem;
    --max-page: 80rem;
    --section-gap: 3rem;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 1em;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--color-darkest);
    font-family: var(--font-primary);
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--color-primary);
}

h1, h2, h3, h4, h5 {
    margin: 0;
    font-family: var(--font-secondary);
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.32;
    color: var(--color-darkest);
}

h1 { font-size: clamp(2rem, 1.2rem + 2.5vw, 3rem); }
h2 { font-size: clamp(1.6rem, 1.1rem + 1.8vw, 2.125rem); }
h3 { font-size: clamp(1.35rem, 1rem + 1vw, 2rem); }
h4 { font-size: 1.375rem; }
h5 { font-size: .9375rem; letter-spacing: 0; line-height: 1.4; }

p {
    font-size: 1.125rem;
    line-height: 1.5;
    margin: 0 auto 1rem 0;
}

/* ============ Containers ============ */
.full-containter {
    width: 100%;
}

.inner-container {
    width: 100%;
    margin: 0 auto;
    padding-left: var(--gap-sm);
    padding-right: var(--gap-sm);
    max-width: calc(var(--max-page) + var(--gap-md) * 2);
}

@media screen and (min-width: 1105px) {
    .inner-container {
        padding-left: var(--gap-md);
        padding-right: var(--gap-md);
    }
}

.section {
    margin-top: var(--section-gap);
}

/* ============ Buttons ============ */
.base-button {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.5rem;
    border-radius: var(--radius-pill);
    border: 2px solid transparent;
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -.25px;
    text-decoration: none;
    cursor: pointer;
    transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}

.base-button--primary {
    background-color: var(--color-primary);
    color: var(--color-lightest);
}

.base-button--primary:hover {
    background-color: var(--color-primary-dark);
}

.base-button--outline {
    background: transparent;
    border-color: currentColor;
    color: inherit;
}

.base-button--outline:hover {
    background-color: rgba(255, 255, 255, .1);
}

/* ============ Header ============ */
.full-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-lightest);
    box-shadow: var(--shadow-light);
}

.inner-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    min-height: 5rem;
}

.header-logo img {
    height: 3.25rem;
    width: auto;
}

.header-menu {
    margin-left: 1rem;
}

.header-menu nav {
    display: none;
    align-items: center;
    gap: 1.75rem;
}

@media screen and (min-width: 1105px) {
    .header-menu nav {
        display: flex;
    }
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: .375rem;
    padding: 1.75rem 0;
    color: var(--color-darkest);
    font-size: 1.05rem;
    text-decoration: none;
    white-space: nowrap;
}

.nav-link i {
    font-size: .75em;
    transition: transform .15s ease;
}

.nav-item:hover > .nav-link,
.nav-item:focus-within > .nav-link {
    color: var(--color-primary);
}

.nav-item:hover > .nav-link i,
.nav-item:focus-within > .nav-link i {
    transform: rotate(180deg);
}

.submenu {
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translateX(-50%);
    display: none;
    min-width: 18rem;
    background: var(--color-lightest);
    box-shadow: var(--shadow-medium);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    padding: 1.5rem;
    z-index: 110;
}

.nav-item:hover > .submenu,
.nav-item:focus-within > .submenu {
    display: block;
}

.submenu a {
    display: block;
    padding: .55rem 0;
    color: var(--color-darkest);
    text-decoration: none;
    font-size: 1rem;
    white-space: nowrap;
}

.submenu a:hover {
    color: var(--color-primary);
}

/* Header search box removed — keep the header action group (Liên hệ button,
   language switch, mobile menu) pushed to the right. On desktop the "Liên hệ"
   button carries the auto margin; on mobile that button is hidden, so the
   language switch carries it instead. */
.select-language {
    margin-left: auto;
}

@media screen and (min-width: 1105px) {
    .select-language {
        margin-left: 0;
    }
}


.header-button {
    display: none;
    margin-left: auto;
}

@media screen and (min-width: 1105px) {
    .header-button {
        display: block;
    }
}

.select-language img {
    height: 1.5rem;
    width: auto;
    border-radius: 2px;
}

.select-language a {
    display: inline-flex;
    padding: .25rem;
}

.hamburger-menu {
    display: block;
}

@media screen and (min-width: 1105px) {
    .hamburger-menu {
        display: none;
    }
}

.hamburger-menu button {
    border: 0;
    background: transparent;
    font-size: 1.5rem;
    color: var(--color-darkest);
    cursor: pointer;
    padding: .5rem;
}

/* Mobile menu */
.mobile-nav {
    display: none;
    background: var(--color-lightest);
    border-top: 1px solid var(--color-gray-200);
    padding: 1rem 0;
}

.mobile-nav.open {
    display: block;
}

.mobile-nav a {
    display: block;
    padding: .75rem 0;
    color: var(--color-darkest);
    text-decoration: none;
    font-size: 1.125rem;
    border-bottom: 1px solid var(--color-gray-200);
}

/* ============ Hero ============ */
.hero {
    position: relative;
    padding-bottom: 0;
}

.hero__background {
    display: block;
    width: 89.25%;
    height: auto;
    margin: 0 auto;
    border-radius: var(--radius-md);
}

.hero__banner {
    width: 100%;
    max-width: 46rem;
    margin: 1.5rem auto 0;
}

/* Mobile: widen the KV (~+10%) by spanning the full viewport width */
@media (max-width: 640px) {
    .hero__background {
        width: calc(100% + 2 * var(--gap-sm));
        max-width: none;
        margin-left: calc(-1 * var(--gap-sm));
        margin-right: calc(-1 * var(--gap-sm));
    }
}

.upcoming-card {
    display: block;
    background: var(--color-primary);
    color: var(--color-lightest);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-medium);
    padding: 1.75rem 2rem;
    text-decoration: none;
    transition: background-color .15s ease;
}

.upcoming-card:hover {
    background-color: var(--color-primary-dark);
}

.upcoming-card h4 {
    color: inherit;
    margin-bottom: .375rem;
}

.upcoming-card p {
    color: inherit;
    margin-bottom: .75rem;
    font-size: 1rem;
}

.upcoming-card .upcoming-meta {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: 1rem;
}

/* ============ Welcome strip ============ */
.title-welcome {
    padding: 10.5rem 0 var(--section-gap);
    text-align: center;
}

.title-welcome h1 {
    max-width: 56rem;
    margin: 0 auto;
}

.title-welcome h2 {
    margin-top: 1rem;
    color: var(--color-gray-500);
    font-weight: 600;
}

/* ============ Section header ============ */
.section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.section-action {
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-darkest);
    text-decoration: none;
    white-space: nowrap;
}

.section-action:hover {
    color: var(--color-primary);
}

/* ============ CTA cards ============ */
.cta-cards-list__wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
    gap: var(--gap-sm);
}

.cta-card {
    display: flex;
    flex-direction: column;
    gap: .5rem;
    background: var(--color-secondary-light);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    text-decoration: none;
    text-align: center;
    transition: transform .15s ease, box-shadow .15s ease;
}

.cta-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.cta-card h4 {
    color: var(--color-darkest);
}

.cta-card p {
    color: var(--color-gray-500);
    font-size: 1rem;
    margin: 0;
}

.cta-card .cta-icon {
    margin-top: auto;
    align-self: center;
    font-size: 1.5rem;
    color: var(--color-primary);
}

/* ============ News list (no thumbnails) ============ */
.news-frame {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--color-gray-200);
}

.news-box {
    display: block;
    padding: 1rem .25rem;
    border-bottom: 1px solid var(--color-gray-200);
    text-decoration: none;
    transition: background-color .15s ease;
}

/* Items without a real link: very light hover only, no pointer */
.news-box:hover {
    background-color: var(--color-gray-100);
}

/* Items with a real link: pointer + clearer hover + focus ring */
a.news-box {
    cursor: pointer;
}

a.news-box:hover {
    background-color: var(--color-secondary-light);
}

a.news-box:hover .news-title h4 {
    color: var(--color-primary-dark);
}

a.news-box:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.news-title {
    padding: 0;
}

.news-title h4 {
    margin: 0 0 .25rem;
    font-size: 1.05rem;
    line-height: 1.35;
    color: var(--color-darkest);
    transition: color .15s ease;
}

.news-description {
    padding: 0;
}

.news-description p {
    color: var(--color-gray-500);
    font-size: .9rem;
    margin: 0 0 .4rem;
}

.news-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
}

/* ============ Meeting notice tabs (thong-bao-hop-ban-chap-hanh) ============ */
.hbch-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    border-bottom: 2px solid var(--color-gray-200);
    margin-bottom: 1.75rem;
}

.hbch-tab {
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: .95rem;
    color: var(--color-darkest);
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-200);
    border-bottom: none;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    padding: .7rem 1.1rem;
    cursor: pointer;
    transition: background-color .15s ease, color .15s ease;
}

.hbch-tab:hover { background: var(--color-secondary-light); }
.hbch-tab:focus-visible { outline: 2px solid var(--color-primary-dark); outline-offset: 2px; }
.hbch-tab.is-active {
    background: var(--color-primary);
    color: var(--color-lightest);
    border-color: var(--color-primary);
}

.hbch-panel { display: none; }
.hbch-panel.is-active { display: block; }

.hbch-summary h3 {
    font-family: var(--font-secondary);
    color: var(--color-darkest);
    font-size: 1.15rem;
    margin: 1.25rem 0 .5rem;
}
.hbch-summary h3:first-child { margin-top: 0; }
.hbch-summary ul,
.hbch-summary ol { line-height: 1.6; padding-left: 1.25rem; }
.hbch-summary li { margin-bottom: .35rem; }
.hbch-meta { color: var(--color-gray-500); font-size: .95rem; }

.hbch-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .92rem;
    margin-top: .5rem;
}
.hbch-table th,
.hbch-table td {
    border: 1px solid var(--color-gray-300);
    padding: .5rem .65rem;
    text-align: left;
    vertical-align: top;
}
.hbch-table thead th {
    background: var(--color-secondary-light);
    color: var(--color-darkest);
}

.hbch-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    margin-top: 1.5rem;
}

.tag {
    display: inline-block;
    background: var(--color-secondary-light);
    color: var(--color-darkest);
    border-radius: var(--radius-pill);
    padding: .25rem .875rem;
    font-size: .8125rem;
    font-weight: 600;
}

/* ============ Quote / text + image ============ */
.text-image-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gap-md);
    align-items: center;
}

@media screen and (min-width: 1105px) {
    .text-image-section[data-aside="right"] {
        grid-template-columns: 1fr 1fr;
    }

    .text-image-section[data-aside="right"] .text-image-figure {
        order: 2;
    }
}

.text-image-figure {
    margin: 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.text-image-figure img {
    width: 100%;
}

.quote-author {
    color: var(--color-gray-500);
    font-size: 1rem;
}

/* ============ Scientific tracks ============ */
.tracks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr));
    gap: var(--gap-sm);
}

.track-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1.5rem;
    border-radius: var(--radius-md);
    padding: 1.5rem;
    min-height: 9rem;
    text-decoration: none;
    color: var(--color-darkest);
    transition: transform .15s ease, box-shadow .15s ease;
}

.track-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.track-card h4 {
    font-size: 1.125rem;
}

.track-card .track-go {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: .9375rem;
}

/* ============ Footer ============ */
.footer {
    margin-top: 5rem;
    background: var(--color-darkest);
    color: var(--color-lightest);
}

.footer a {
    color: var(--color-lightest);
}

.footer__navigation {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    gap: var(--gap-sm);
    padding: var(--section-gap) 0;
}

.footer-list h5 {
    color: var(--color-lightest);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.footer-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-list li {
    margin-bottom: .65rem;
    color: rgba(255, 255, 255, .85);
    font-size: .95rem;
}

.footer-list a {
    color: rgba(255, 255, 255, .85);
    text-decoration: none;
    font-size: .95rem;
}

.footer-list a:hover {
    color: var(--color-primary-light);
}

.footer__socials {
    display: flex;
    gap: 1rem;
    padding-bottom: var(--section-gap);
}

.socials__social {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid rgba(255, 255, 255, .35);
    border-radius: 50%;
    font-size: 1.125rem;
    text-decoration: none;
    transition: background-color .15s ease, border-color .15s ease;
}

.socials__social:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.footer__sub-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border-top: 1px solid rgba(255, 255, 255, .2);
    padding: 1.5rem 0;
}

.footer__legal {
    display: flex;
    gap: 1.5rem;
}

.footer__legal a {
    color: rgba(255, 255, 255, .85);
    text-decoration: none;
    font-size: .9rem;
}

.footer__legal a:hover {
    color: var(--color-primary-light);
}

.footer-logo {
    height: 2.5rem;
    filter: brightness(0) invert(1);
}

/* ============ PDF modal ============ */
.pdf-modal {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: rgba(21, 36, 67, .6);
}

.pdf-modal.open {
    display: flex;
}

.pdf-modal__dialog {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 56rem;
    height: 80vh;
    max-height: 100%;
    background: var(--color-lightest);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
}

.pdf-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.pdf-modal__title {
    font-weight: 600;
    color: var(--color-darkest);
}

.pdf-modal__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: none;
    width: 2.25rem;
    height: 2.25rem;
    border: none;
    border-radius: 50%;
    background: var(--color-gray-200);
    color: var(--color-darkest);
    font-size: 1.125rem;
    cursor: pointer;
    transition: background-color .15s ease;
}

.pdf-modal__close:hover {
    background: var(--color-gray-300);
}

.pdf-modal__body {
    flex: 1;
    background: var(--color-gray-200);
}

.pdf-modal__body iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

@media (max-width: 640px) {
    .pdf-modal {
        padding: .75rem;
    }

    .pdf-modal__dialog {
        height: 88vh;
    }
}

/* ---------- VSOT 2026 venue map (home page) ---------- */
.map-cta {
    margin-top: 1.75rem;
}

.map-cta__btn {
    font-size: 1.15rem;
    padding: .85rem 2.25rem;
}

/* Home only: the KV banner now sits above, so trim the big top padding */
.title-welcome--home {
    padding-top: 2.5rem;
    padding-bottom: 2rem;
}

.section--cta-cards {
    margin-top: 1rem;
}

.map-viewer {
    position: fixed;
    inset: 0;
    z-index: 400;
    display: none;
    flex-direction: column;
    background: var(--color-darkest);
}

.map-viewer.open {
    display: flex;
}

.map-viewer__bar {
    flex: none;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: .6rem 1rem;
    background: var(--color-lightest);
    border-bottom: 1px solid var(--color-gray-200);
}

.map-viewer__title {
    flex: 1 1 auto;
    min-width: 0;
    font-family: var(--font-secondary);
    font-weight: 700;
    color: var(--color-darkest);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.map-viewer__hint {
    color: var(--color-gray-500);
    font-size: .85rem;
}

.map-viewer__open {
    flex: none;
    color: var(--color-primary-dark);
    font-weight: 600;
    white-space: nowrap;
    text-decoration: underline;
}

.map-viewer__close {
    flex: none;
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border: 0;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-lightest);
    font-size: 1.25rem;
    cursor: pointer;
    transition: background-color .15s ease;
}

.map-viewer__close:hover {
    background: var(--color-primary-dark);
}

.map-viewer__close:focus-visible {
    outline: 2px solid var(--color-primary-dark);
    outline-offset: 2px;
}

.map-viewer__body {
    flex: 1 1 auto;
    min-height: 0;
    background: var(--color-gray-200);
}

.map-viewer__body iframe {
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
}

@media (max-width: 640px) {
    .map-viewer__hint {
        display: none;
    }

    .map-viewer__bar {
        padding: .5rem .75rem;
    }

    .map-viewer__close {
        width: 3rem;
        height: 3rem;
        font-size: 1.35rem;
    }

    .map-viewer__open {
        font-size: .85rem;
    }
}

/* ---------- Document downloads / invitations (home page) ---------- */
.doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.doc-card {
    display: flex;
    flex-direction: column;
    gap: .75rem;
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background: var(--color-lightest);
    box-shadow: var(--shadow-light);
}

.doc-card__icon {
    font-size: 1.75rem;
    color: var(--color-primary);
}

.doc-card__icon--inline {
    font-size: 1.25rem;
}

.doc-card h4 {
    margin: 0;
    font-family: var(--font-secondary);
    font-size: 1.05rem;
    line-height: 1.3;
    color: var(--color-darkest);
}

.doc-card p {
    flex: 1 1 auto;
    margin: 0;
    font-size: .9rem;
    color: var(--color-gray-500);
}

.doc-card__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem;
    margin-top: .25rem;
}

.doc-card__actions .base-button {
    font-size: .9rem;
    padding: .5rem 1.1rem;
}

.doc-card--center {
    text-align: center;
    align-items: center;
}

.doc-card--center .doc-card__actions {
    justify-content: center;
}

.doc-note {
    margin-top: .75rem;
    font-size: .9rem;
    color: var(--color-gray-500);
}

.doc-badge {
    align-self: flex-start;
    display: inline-block;
    padding: .15rem .65rem;
    border-radius: var(--radius-pill);
    background: var(--color-secondary-light);
    color: var(--color-primary-dark);
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .02em;
    text-transform: uppercase;
}

/* =========================================================
   SCIENTIFIC PROGRAMME TIMELINE (VSOT 2026)
   ========================================================= */
.programme {
    --prog-axis: 4.5rem;
    /* each hall column ~10px wider */
    --prog-col: calc(16.5rem + 10px);
}

.prog-intro {
    text-align: center;
    padding: 3rem 0 0;
}

.prog-intro p {
    color: var(--color-gray-500);
    /* centre the subtitle block on the same axis as the title (the global
       p rule sets margin-left:0, which left-aligned it) and keep it wide
       enough to stay on one line on desktop */
    max-width: 64rem;
    margin-left: auto;
    margin-right: auto;
}

/* ---------- Toolbar: days + view toggle ---------- */
.prog-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.prog-days {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
}

.prog-day {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: .15rem;
    border: 1px solid var(--color-gray-300);
    background: var(--color-lightest);
    color: var(--color-darkest);
    border-radius: var(--radius-sm);
    padding: .5rem .9rem;
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: .95rem;
    cursor: pointer;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}

.prog-day small {
    font-family: var(--font-primary);
    font-weight: 400;
    font-size: .7rem;
    letter-spacing: 0;
    color: var(--color-gray-500);
}

.prog-day:hover {
    border-color: var(--color-primary);
}

.prog-day.is-active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-lightest);
}

.prog-day.is-active small {
    color: rgba(255, 255, 255, .85);
}

.prog-viewtoggle {
    display: inline-flex;
    gap: .25rem;
    background: var(--color-gray-200);
    border-radius: var(--radius-pill);
    padding: .25rem;
}

.prog-viewtoggle button {
    border: 0;
    background: transparent;
    border-radius: var(--radius-pill);
    padding: .45rem .95rem;
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: .875rem;
    color: var(--color-gray-500);
    cursor: pointer;
}

.prog-viewtoggle button.is-active {
    background: var(--color-lightest);
    color: var(--color-darkest);
    box-shadow: var(--shadow-light);
}

/* ---------- Filters ---------- */
.prog-filters {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 1rem 1.75rem;
    padding: 1rem 1.25rem;
    background: var(--color-secondary-light);
    border-radius: var(--radius-md);
    /* right edge of the light-blue filters bar is square (left stays rounded) */
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    margin-bottom: 1.25rem;
    /* keep the search bar / filters in view while scrolling the results */
    position: sticky;
    top: 5rem;
    z-index: 40;
}

.prog-filter-group {
    display: flex;
    flex-direction: column;
    gap: .4rem;
}

.prog-filter-group > span {
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .4px;
    color: var(--color-darkest);
}

.prog-chips {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
}

.prog-chip {
    border: 1px solid var(--color-gray-300);
    background: var(--color-lightest);
    color: var(--color-darkest);
    border-radius: var(--radius-pill);
    padding: .3rem .8rem;
    font-size: .85rem;
    cursor: pointer;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}

.prog-chip:hover {
    border-color: var(--color-secondary);
}

.prog-chip.is-active {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
    color: var(--color-lightest);
}

.prog-search-wrap {
    margin-left: auto;
    min-width: 15rem;
    flex: 1 1 15rem;
    max-width: 22rem;
}

.prog-search-wrap input {
    width: 100%;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-pill);
    padding: .55rem 1rem;
    font-size: .95rem;
    font-family: var(--font-primary);
    outline: none;
}

.prog-search-wrap input:focus {
    border-color: var(--color-secondary);
}

/* ---------- Timeline ---------- */
.prog-stage {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    /* visible so the timeline's sticky header can pin to the page while
       scrolling (an overflow ancestor would become the sticky container) */
    overflow: visible;
    background: var(--color-lightest);
}

.tl-wrap {
    position: relative;
}

/* Timeline header row — sticky below the site header while the page scrolls;
   unsticks at the end of .tl-wrap. Columns scroll horizontally in sync with
   the body (set via transform in wireScrollNav). */
.tl-sticky-head {
    position: sticky;
    /* sits below the site header AND the sticky filters above it (the filter
       height is published as --prog-filters-h by programme.js) */
    top: calc(5rem + var(--prog-filters-h, 0px));
    z-index: 30;
    display: flex;
    flex-direction: column;
    background: var(--color-lightest);
    border-bottom: 1px solid var(--color-gray-300);
}

.tl-head-row {
    display: flex;
}

.tl-head-row > .tl-axis-head {
    border-bottom: 0;
}

.tl-head-rooms {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
}

.tl-head-rooms-inner {
    display: flex;
    will-change: transform;
}

.tl-head-rooms-inner > .tl-room-head {
    flex: none;
    width: var(--prog-col);
    border-bottom: 0;
    border-right: 1px solid var(--color-gray-200);
}

.tl-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .5rem .75rem;
    border-bottom: 1px solid var(--color-gray-200);
    background: var(--color-gray-100);
}

.tl-nav-hint {
    font-size: .85rem;
    font-weight: 600;
    color: var(--color-darkest);
}

.tl-nav-btns {
    display: inline-flex;
    gap: .4rem;
    flex: none;
}

.tl-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    background: var(--color-lightest);
    color: var(--color-primary);
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1;
    box-shadow: var(--shadow-medium);
    cursor: pointer;
    transition: background-color .15s ease, color .15s ease, border-color .15s ease, opacity .15s ease, transform .15s ease;
}

.tl-nav-btn:hover:not(:disabled) {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-lightest);
    transform: scale(1.06);
}

.tl-nav-btn:active:not(:disabled) {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-lightest);
    transform: scale(.97);
}

.tl-nav-btn:disabled {
    opacity: .3;
    box-shadow: none;
    border-color: var(--color-gray-300);
    color: var(--color-gray-300);
    cursor: default;
}

.prog-timeline-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    /* room above the first hour tick (its centred label overflows upward) */
    padding-top: .5rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-color: var(--color-gray-300) var(--color-gray-100);
    scrollbar-width: thin;
}

.prog-timeline-scroll::-webkit-scrollbar {
    height: .7rem;
}

.prog-timeline-scroll::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

.prog-timeline-scroll::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: var(--radius-pill);
}

.tl-inner {
    display: flex;
    min-width: max-content;
    /* room below the last slot so a hover-expanded block is not clipped */
    padding-bottom: 6rem;
}

.tl-axis {
    position: sticky;
    left: 0;
    z-index: 10;
    flex: none;
    width: var(--prog-axis);
    background: var(--color-lightest);
    border-right: 1px solid var(--color-gray-300);
}

.tl-axis-head,
.tl-room-head {
    height: 3.5rem;
    box-sizing: border-box;
    border-bottom: 1px solid var(--color-gray-300);
    background: var(--color-gray-100);
}

.tl-axis-head {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: none;
    width: var(--prog-axis);
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: .8rem;
    color: var(--color-gray-500);
}

.tl-room {
    flex: none;
    width: var(--prog-col);
    border-right: 1px solid var(--color-gray-200);
}

.tl-room-head {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    flex: none;
    width: var(--prog-col);
    padding: 0 .5rem;
    font-family: var(--font-secondary);
    font-weight: 700;
    font-size: .95rem;
    text-transform: uppercase;
    letter-spacing: .2px;
    color: var(--color-darkest);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tl-room-head .tl-room-en {
    display: block;
    font-family: var(--font-primary);
    font-weight: 400;
    font-size: .72rem;
    color: var(--color-gray-500);
    overflow: hidden;
    text-overflow: ellipsis;
}

.tl-axis-body,
.tl-room-body {
    position: relative;
}

.tl-slot-line {
    position: absolute;
    left: 0;
    right: 0;
    border-top: 1px dotted var(--color-gray-300);
}

.tl-slot-line.is-hour {
    border-top: 1px solid var(--color-gray-200);
}

.tl-axis-label {
    position: absolute;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    text-align: center;
    font-size: 1rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: .2px;
    color: var(--color-darkest);
    font-variant-numeric: tabular-nums;
    /* opaque background so no grid/border ever crosses the time text */
    background: var(--color-lightest);
    padding: .15rem 0;
    z-index: 2;
}

.tl-room-body {
    background: var(--color-gray-100);
}

/* ---------- Session block ---------- */
.tl-event {
    position: absolute;
    box-sizing: border-box;
    border: 1px solid var(--color-secondary);
    border-left-width: 4px;
    border-radius: .4rem;
    background: #eaf6fd;
    padding: .35rem .5rem;
    overflow: hidden;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-primary);
    transition: box-shadow .15s ease, transform .15s ease;
}

.tl-event:hover {
    box-shadow: var(--shadow-medium);
    z-index: 6 !important;
}

/* continuation segment of a session split around an inner break */
.tl-event.is-cont {
    border-top-style: dashed;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

.tl-event .tl-time {
    display: block;
    font-size: .9rem;
    font-weight: 700;
    color: var(--color-darkest);
    font-variant-numeric: tabular-nums;
    text-align: center;
    letter-spacing: .2px;
}

.tl-event .tl-title {
    display: block;
    font-size: .8rem;
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-darkest);
    overflow-wrap: anywhere;
}

/* Session titles: Vietnamese bold on one line, English italic below */
.session-title-vi {
    display: block;
    font-weight: 700;
    overflow-wrap: anywhere;
    white-space: pre-line;
}

.session-title-en {
    display: block;
    font-weight: 400;
    font-style: italic;
    color: var(--color-gray-500);
    overflow-wrap: anywhere;
    white-space: pre-line;
}

.prog-talks .session-title-vi,
.prog-talks .session-title-en {
    /* speaker-info column already wraps; keep titles aligned */
    display: block;
}

.tl-event .tl-type {
    display: inline-block;
    font-size: .62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .3px;
    padding: .1rem .35rem;
    border-radius: 3px;
    background: rgba(255, 255, 255, .7);
    color: var(--color-darkest);
    margin-bottom: .2rem;
    /* keep clear of the report-count badge in the top-right corner */
    max-width: calc(100% - 6.5rem);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    vertical-align: top;
}

/* total reports — top-right corner of the session cell */
.tl-event .tl-count {
    position: absolute;
    top: .3rem;
    right: .35rem;
    z-index: 3;
    display: inline-flex;
    align-items: center;
    gap: .2rem;
    font-size: .66rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-darkest);
    background: rgba(255, 255, 255, .85);
    border: 1px solid rgba(0, 0, 0, .08);
    border-radius: var(--radius-pill);
    padding: .05rem .4rem;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.tl-event .tl-count i {
    font-size: .62rem;
    opacity: .75;
}

/* type colours */
.tl-event.t-session { background: #eaf6fd; border-color: #65abdc; }
.tl-event.t-cme { background: #e9f7ee; border-color: #3fa66a; }
.tl-event.t-plenary { background: #fff0e8; border-color: #fe6b2e; }
.tl-event.t-debate { background: #f3edfa; border-color: #8b5cf6; }
.tl-event.t-live_surgery { background: #fdeef2; border-color: #e0426b; }
.tl-event.t-symposium { background: #fff7e0; border-color: #d9a400; text-align: center; }
.tl-event.t-symposium .tl-title { text-align: center; }
.tl-event.t-opening,
.tl-event.t-closing,
.tl-event.t-welcome { background: #fff3ea; border-color: #fe6b2e; border-left-color: #fe6b2e; }
.tl-event.t-meeting { background: #eef1f5; border-color: #8a97a8; }
.tl-event.t-gala { background: #f6ecff; border-color: #a855f7; }
.tl-event.t-tea_break {
    background: repeating-linear-gradient(45deg, #f1f1f4, #f1f1f4 6px, #e6e6ea 6px, #e6e6ea 12px);
    border-color: #c6c6cc;
    border-left-color: #c6c6cc;
    /* one row: label pinned left, name centred in the remaining space */
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: .5rem;
    text-align: left;
    padding: .1rem .5rem;
    overflow: hidden;
}
.tl-event.t-tea_break .tl-type {
    flex: none;
    margin-bottom: 0;
    background: rgba(255, 255, 255, .8);
}
.tl-event.t-tea_break .tl-title {
    flex: 1 1 auto;
    min-width: 0;
    font-size: .74rem;
    line-height: 1.1;
    text-align: center;
}
/* only the type label + the session name are shown for a break */
.tl-event.t-tea_break .tl-time { display: none; }

/* ---------- List view ---------- */
.prog-list {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.prog-list-room h3 {
    font-size: 1.15rem;
    margin-bottom: .25rem;
}

.prog-list-room .prog-list-room-en {
    color: var(--color-gray-500);
    font-size: .82rem;
    margin-bottom: .75rem;
}

.prog-card {
    display: flex;
    gap: 1rem;
    width: 100%;
    text-align: left;
    border: 1px solid var(--color-gray-200);
    border-left: 4px solid var(--color-secondary);
    border-radius: var(--radius-sm);
    background: var(--color-lightest);
    padding: .75rem 1rem;
    margin-bottom: .5rem;
    cursor: pointer;
    font-family: var(--font-primary);
    transition: box-shadow .15s ease;
}

.prog-card:hover { box-shadow: var(--shadow-medium); }

.prog-card.t-session { border-left-color: #65abdc; }
.prog-card.t-cme { border-left-color: #3fa66a; }
.prog-card.t-plenary { border-left-color: #fe6b2e; }
.prog-card.t-debate { border-left-color: #8b5cf6; }
.prog-card.t-live_surgery { border-left-color: #e0426b; }
.prog-card.t-symposium { border-left-color: #d9a400; }
.prog-card.t-opening, .prog-card.t-closing, .prog-card.t-welcome { border-left-color: #fe6b2e; }
.prog-card.t-meeting { border-left-color: #8a97a8; }
.prog-card.t-gala { border-left-color: #a855f7; }
.prog-card.t-tea_break { border-left-color: #c6c6cc; }

.prog-card__time {
    flex: none;
    width: 7rem;
    font-weight: 700;
    font-size: .95rem;
    color: var(--color-darkest);
    font-variant-numeric: tabular-nums;
    text-align: center;
    align-self: flex-start;
    padding-top: .1rem;
}

.prog-card__body { flex: 1; min-width: 0; }
.prog-card__body h4 { font-size: 1rem; line-height: 1.3; }
.prog-card__meta { margin-top: .35rem; font-size: .8rem; color: var(--color-gray-500); }

.prog-badge {
    display: inline-block;
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .3px;
    color: var(--color-lightest);
    background: var(--color-secondary);
    border-radius: 3px;
    padding: .1rem .4rem;
    margin-right: .4rem;
    vertical-align: middle;
}

.prog-badge.t-cme { background: #3fa66a; }
.prog-badge.t-plenary { background: #fe6b2e; }
.prog-badge.t-debate { background: #8b5cf6; }
.prog-badge.t-live_surgery { background: #e0426b; }
.prog-badge.t-symposium { background: #d9a400; }
.prog-badge.t-opening, .prog-badge.t-closing, .prog-badge.t-welcome { background: #fe6b2e; }
.prog-badge.t-meeting { background: #8a97a8; }
.prog-badge.t-gala { background: #a855f7; }
.prog-badge.t-tea_break { background: #c6c6cc; }

/* ---------- Empty state ---------- */
.prog-empty {
    padding: 3rem 1rem;
    text-align: center;
    color: var(--color-gray-500);
}

/* ---------- Poster tabs + views (independent dataset, no timeline) ---------- */
.prog-day.prog-poster {
    border-style: dashed;
    background: #fff7e0;
}

.prog-day.prog-poster small { color: var(--color-gray-500); }
.prog-day.prog-poster:hover { border-color: #d9a400; }

.prog-day.prog-poster.is-active {
    background: #d9a400;
    border-color: #d9a400;
    color: var(--color-lightest);
}

.prog-day.prog-poster.is-active small { color: rgba(255, 255, 255, .85); }

.prog-filters.is-poster .prog-filter-group { display: none; }

.prog-poster-view { padding: 1rem; }

.prog-poster-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: .5rem 1rem;
    padding-bottom: .75rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.prog-poster-head h3 { font-size: 1.25rem; }
.prog-poster-count { color: var(--color-gray-500); font-size: .9rem; }

.prog-poster-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
    gap: 1rem;
}

.prog-poster-item {
    display: flex;
    gap: .85rem;
    padding: 1rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-sm);
    background: var(--color-lightest);
}

.prog-poster-no {
    flex: none;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--color-secondary-light);
    color: var(--color-darkest);
    font-weight: 700;
    font-size: .9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.prog-poster-index {
    flex: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .3rem;
}
.prog-poster-body { min-width: 0; }
.prog-poster-title { font-size: 1rem; line-height: 1.3; overflow-wrap: anywhere; }
.prog-poster-author { margin-top: .35rem; font-size: .85rem; font-weight: 600; color: var(--color-darkest); overflow-wrap: anywhere; }
.prog-poster-aff { margin-top: .15rem; font-size: .82rem; color: var(--color-gray-500); overflow-wrap: anywhere; }

/* ---------- Detail modal ---------- */
.prog-modal {
    position: fixed;
    inset: 0;
    z-index: 250;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding: 2rem 1rem;
    background: rgba(21, 36, 67, .6);
    overflow-y: auto;
}

.prog-modal.open { display: flex; }

.prog-modal__dialog {
    position: relative;
    width: 100%;
    max-width: 46rem;
    background: var(--color-lightest);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
}

.prog-modal__head {
    padding: 1.25rem 1.5rem 1rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.prog-modal__close {
    position: absolute;
    top: .75rem;
    right: .75rem;
    width: 2.25rem;
    height: 2.25rem;
    border: 0;
    border-radius: 50%;
    background: var(--color-gray-200);
    color: var(--color-darkest);
    font-size: 1.1rem;
    cursor: pointer;
}

.prog-modal__title {
    font-size: 1.3rem;
    line-height: 1.3;
    padding-right: 2rem;
    white-space: pre-line;
}

.prog-modal__title-en {
    color: var(--color-gray-500);
    font-size: .95rem;
    font-weight: 400;
    font-style: italic;
    white-space: pre-line;
    margin-top: .25rem;
}

.prog-modal__facts {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem 1.25rem;
    margin-top: .75rem;
    font-size: .9rem;
    color: var(--color-darkest);
}

.prog-modal__facts i { color: var(--color-secondary); margin-right: .3rem; }

.prog-modal__body {
    padding: 1rem 1.5rem 1.5rem;
    max-height: 62vh;
    overflow-y: auto;
}

.prog-modal__section {
    margin-top: 1rem;
}

.prog-modal__section h5 {
    font-family: var(--font-secondary);
    font-weight: 700;
    font-size: .95rem;
    text-transform: uppercase;
    letter-spacing: .4px;
    color: var(--color-gray-500);
    margin-bottom: .5rem;
}

.prog-chairs {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
}

.prog-chair {
    background: var(--color-secondary-light);
    border-radius: var(--radius-pill);
    padding: .25rem .75rem;
    font-size: .82rem;
}

.prog-talks {
    width: 100%;
    border-collapse: collapse;
    font-size: .88rem;
}

.prog-talks th {
    text-align: left;
    font-family: var(--font-secondary);
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .3px;
    color: var(--color-gray-500);
    border-bottom: 1px solid var(--color-gray-300);
    padding: .4rem .5rem;
}

.prog-talks td {
    vertical-align: top;
    border-bottom: 1px solid var(--color-gray-200);
    padding: .55rem .5rem;
}

.prog-talks td.t-time {
    white-space: nowrap;
    font-weight: 700;
    text-align: center;
    color: var(--color-darkest);
    font-variant-numeric: tabular-nums;
    width: 6.5rem;
}

.prog-talks .t-talk-title { font-weight: 600; }
.prog-talks .t-talk-lines { display: block; margin-top: .15rem; }
.prog-talks .t-talk-line { display: block; margin: .15rem 0; font-weight: 400; overflow-wrap: anywhere; }
.prog-talks .t-talk-line.is-head,
.prog-talks .t-talk-line.is-head strong { font-weight: 700; color: var(--color-darkest); }
.prog-talks .t-talk-speaker { color: var(--color-gray-500); font-size: .82rem; margin-top: .15rem; }
.prog-talks .t-speaker-label { font-weight: 600; color: var(--color-darkest); }

/* "Báo cáo" rows:
   [Báo cáo] | Báo cáo viên: <b>Name</b>     <- flex row (pill | speaker-info)
             | Organization                   <- inside speaker-info (aligned to label)
   <b>Presentation title</b>                 <- sibling of the row, aligned to the
                                                td content left = LEFT EDGE OF THE PILL */
.prog-talks .prog-talk-meta {
    display: flex;
    align-items: flex-start;
    gap: .4rem;
    overflow-wrap: anywhere;
}

.prog-talks .prog-talk-meta > .prog-talk-type {
    flex: none;
}

.prog-talks .prog-speaker-info {
    flex: 1 1 auto;
    min-width: 0;
}

.prog-talks .prog-speaker-line {
    display: block;
    overflow-wrap: anywhere;
}

.prog-talks .prog-speaker-label {
    font-weight: 400;
    color: var(--color-darkest);
}

.prog-talks .prog-speaker-name {
    font-weight: 700;
    color: var(--color-darkest);
    overflow-wrap: anywhere;
}

.prog-talks .prog-speaker-org {
    display: block;
    font-weight: 400;
    color: var(--color-gray-500);
    overflow-wrap: anywhere;
}

.prog-talks .prog-talk-title {
    display: block;
    margin-top: .35rem;
    font-weight: 700;
    color: var(--color-darkest);
    overflow-wrap: anywhere;
}

/* time column: time on top, then [report no] + Abstract button underneath */
.prog-talks .t-time-val { display: block; }
.prog-talks .t-time-actions {
    display: flex;
    align-items: center;
    gap: .3rem;
    margin-top: .3rem;
}
.prog-talks .t-time-actions .prog-abstract {
    display: flex;
    flex: 1 1 auto;
    width: auto;
    min-width: 0;
    margin-top: 0;
}
.prog-talks .t-report-no {
    flex: none;
    font-size: .72rem;
    font-weight: 700;
    color: var(--color-primary-dark);
}

/* Abstract button — UI affordance only; action is wired in a later phase */
.prog-abstract {
    flex: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 1.5rem;
    padding: .15rem .5rem;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-pill);
    background: var(--color-lightest);
    color: var(--color-primary-dark);
    font-family: var(--font-primary);
    font-size: .72rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: .01em;
    cursor: pointer;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}

.prog-abstract:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-lightest);
}

.prog-abstract:focus-visible {
    outline: 2px solid var(--color-primary-dark);
    outline-offset: 2px;
}
.prog-talks .is-match { background: #fff7e0; }

/* discussion / non-report rows stay visible but are visually secondary */
.prog-talks tr.is-discussion .t-talk-title {
    font-weight: 400;
    color: var(--color-gray-500);
}

.prog-talks tr.is-discussion .prog-talk-type {
    background: #f1f1f4;
    color: var(--color-gray-500);
}

/* break row inserted inside a session's detail list */
.prog-talks tr.is-break td {
    background: #f7f7f9;
}

.prog-talks tr.is-break .prog-talk-type {
    background: #c6c6cc;
    color: var(--color-lightest);
}

.prog-talks tr.is-break .t-talk-title {
    font-weight: 700;
}

.prog-talk-type {
    display: inline-block;
    font-size: .62rem;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: 3px;
    padding: .05rem .3rem;
    background: var(--color-gray-200);
    color: var(--color-gray-500);
    margin-right: .35rem;
}

.prog-note {
    color: var(--color-gray-500);
    font-size: .9rem;
    font-style: italic;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .programme { --prog-col: calc(13.5rem + 10px); --prog-axis: 3.5rem; }
    .prog-search-wrap { margin-left: 0; max-width: none; }
    .prog-modal { padding: .75rem; }
    .prog-modal__body { max-height: 68vh; }
    .prog-card__time { width: 5.5rem; font-size: .82rem; }
    .tl-axis-label { font-size: .85rem; }
    .tl-room-head { font-size: .85rem; }

    /* MOBILE: keep ONLY the timeline header (hint + room names + time axis)
       sticky, pinned right below the site header. The day tabs / filters /
       search bar above the hint scroll away, giving the timeline far more
       vertical room. Desktop keeps the sticky filters unchanged. */
    .prog-filters { position: static; top: auto; }
    .tl-sticky-head { top: 5rem; }


    /* MOBILE-ONLY report layout: keep the speaker label, the organization and
       the title on one left axis (the pill is a fixed first column, the
       speaker-info block is the second), and let long names/titles wrap
       without a fixed margin. Desktop (>640px) is untouched. */
    .prog-talks .prog-talk-meta {
        align-items: flex-start;
        gap: .35rem;
    }

    .prog-talks .prog-speaker-info {
        min-width: 0;
    }

    .prog-speaker-line,
    .prog-speaker-name,
    .prog-speaker-org,
    .prog-talk-title {
        overflow-wrap: anywhere;
    }

    /* Abstract button: comfortable tap target without breaking the layout */
    .prog-abstract {
        min-height: 1.75rem;
        padding: .3rem .6rem;
        font-size: .74rem;
    }

    /* page title fits on one line on small screens (no change on desktop) */
    .prog-intro h1 {
        font-size: clamp(1.05rem, 5vw, 1.6rem);
        letter-spacing: -0.5px;
        line-height: 1.2;
    }

    /* day-tab label "Chương trình khoa học" stays on one line */
    .prog-day small {
        white-space: nowrap;
    }

    /* break block: keep "GIẢI LAO" left and "Tea Break" centred on one row,
       with slightly smaller type so neither is clipped on a narrow phone */
    .tl-event.t-tea_break {
        gap: .3rem;
        padding-left: .4rem;
        padding-right: .4rem;
    }

    .tl-event.t-tea_break .tl-type {
        font-size: .56rem;
        padding: .05rem .28rem;
    }

    .tl-event.t-tea_break .tl-title {
        font-size: .68rem;
    }
}

/* ---------- Abstract reader (full-screen document viewer) ---------- */
.prog-abstract-reader {
    position: fixed; inset: 0; z-index: 300;
    display: none; flex-direction: column; background: var(--color-lightest);
}
.prog-abstract-reader.open { display: flex; }
.prog-abstract-reader__bar {
    flex: none; display: flex; align-items: center; gap: .75rem;
    padding: .6rem 1rem; border-bottom: 1px solid var(--color-gray-200);
    background: var(--color-lightest);
}
.prog-abstract-reader__back {
    flex: none; display: inline-flex; align-items: center; gap: .45rem;
    padding: .5rem .9rem; min-height: 2.5rem;
    border: 2px solid var(--color-primary); border-radius: var(--radius-pill);
    background: var(--color-lightest); color: var(--color-primary-dark);
    font-family: var(--font-secondary); font-weight: 700; font-size: .95rem;
    cursor: pointer; transition: background-color .15s ease, color .15s ease;
}
.prog-abstract-reader__back:hover { background: var(--color-primary); color: var(--color-lightest); }
.prog-abstract-reader__back:focus-visible { outline: 2px solid var(--color-primary-dark); outline-offset: 2px; }
.prog-abstract-reader__meta { flex: 1 1 auto; min-width: 0; }
.prog-abstract-reader__title {
    font-weight: 700; color: var(--color-darkest); font-size: .98rem;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.prog-abstract-reader__sub {
    color: var(--color-gray-500); font-size: .82rem;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.prog-abstract-reader__tabs { flex: none; display: flex; gap: .35rem; }
.prog-abstract-reader__tab {
    border: 1px solid var(--color-gray-300); background: var(--color-lightest);
    color: var(--color-darkest); border-radius: var(--radius-pill);
    padding: .3rem .7rem; font-size: .8rem; cursor: pointer;
}
.prog-abstract-reader__tab.is-active {
    background: var(--color-secondary); border-color: var(--color-secondary); color: var(--color-lightest);
}
.prog-abstract-reader__stage { position: relative; flex: 1 1 auto; min-height: 0; background: var(--color-gray-100); }
.prog-abstract-reader__frame {
    position: absolute; inset: 0; width: 100%; height: 100%; border: 0;
    display: none; background: #fff;
}
.prog-abstract-reader__frame.is-on { display: block; }
.prog-abstract-reader__status {
    position: absolute; inset: 0; display: none; align-items: center; justify-content: center;
    text-align: center; padding: 2rem; color: var(--color-gray-500); font-size: 1rem;
}
.prog-abstract-reader__status.is-on { display: flex; }
.prog-abstract-reader__msg { max-width: 30rem; }

@media (max-width: 640px) {
    .prog-abstract-reader__bar { flex-wrap: wrap; gap: .5rem; padding: .5rem .6rem; }
    .prog-abstract-reader__meta { order: 3; flex-basis: 100%; }
    .prog-abstract-reader__back { min-height: 2.75rem; }
}