:root {
    --ink: #101010;
    --ink-soft: #4A4A4A;
    --ink-faint: rgba(16, 16, 16, .12);
    --paper: #FAFAFA;
    --paper-alt: #F1F0F0;
    --accent: #ffc200;
    --accent-dark: #ebbc21;
    --accent-text: #f3ae00;
    --accent-soft: #F6EFD9;
    --white: #FFFFFF;

    --color-primary: var(--ink);
    --color-primary-dark: var(--ink);
    --color-primary-light: var(--ink-soft);
    --color-accent: var(--accent);
    --color-accent-dark: var(--accent-dark);
    --color-accent-light: var(--accent-soft);
    --color-text: var(--ink);
    --color-text-muted: var(--ink-soft);
    --color-text-invert: var(--white);
    --color-bg: var(--paper);
    --color-bg-alt: var(--paper-alt);
    --color-border: var(--ink-faint);

    --color-success: #1E8E5A;
    --color-danger: #C0392B;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-toast: 10px;
    --radius-pill: 999px;

    --container-max: 1500px;
    --header-height: 88px;
    --section-gap: 120px;
    --section-gap-80: 80px;
    --section-gap-64: 64px;
    --section-gap-mobile: 64px;

    --shadow-sm: 0 2px 10px rgba(16, 16, 16, .08);
    --shadow-md: 0 8px 24px rgba(16, 16, 16, .12);
    --shadow-lg: 0 16px 40px rgba(16, 16, 16, .16);

    --transition-base: .25s ease;

    --font-heading: 'Archivo', 'Be Vietnam Pro', sans-serif;
    --font-body: 'Be Vietnam Pro', sans-serif;
    --font-display: 'Archivo', 'Be Vietnam Pro', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: clip;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
}

body.no-scroll {
    overflow: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

button {
    font: inherit;
    cursor: pointer;
}

input,
textarea,
select {
    font: inherit;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    margin: 0 0 12px;
    color: var(--color-primary);
}

p {
    margin: 0 0 16px;
    color: var(--color-text-muted);
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: 24px;
}

@media (max-width: 768px) {
    .container {
        padding-inline: 16px;
    }

    .page-hero {
        padding-block: calc(var(--header-height) + 32px) 40px;
    }
}

.section {
    padding-block: var(--section-gap);
}

@media (max-width: 992px) {
    .section {
        padding-block: var(--section-gap-mobile);
    }
}

.section--alt {
    background: var(--paper-alt);
}

.section--ink {
    background: var(--ink);
    color: rgba(255, 255, 255, .88);
}

.section-head {
    max-width: 640px;
    margin-bottom: 52px;
}

.section-head h2 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.2rem, 3.6vw, 3.2rem);
    line-height: 1.05;
    letter-spacing: -.015em;
    color: var(--ink);
    margin-bottom: 12px;
}

.section--ink .section-head h2 {
    color: var(--white);
}

.section-head p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--ink-soft);
    max-width: 56ch;
}

.section--ink .section-head p {
    color: rgba(255, 255, 255, .7);
}

.section-head--center {
    margin-inline: auto;
    text-align: center;
}

.hl {
    color: var(--accent-text);
}

.section--ink .hl {
    color: var(--accent);
}

.value-pair {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

@media (max-width: 800px) {
    .value-pair {
        grid-template-columns: 1fr;
    }
}

.value-pair__card {
    border: 1px solid var(--ink-faint);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: transform .25s ease, border-color .25s ease;
}

.value-pair__card:hover {
    transform: translateY(-3px);
    border-color: var(--ink-soft);
}

.value-pair__card h3 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 19px;
    letter-spacing: .02em;
    margin-bottom: 10px;
}

.value-pair__card p {
    font-size: 15px;
    line-height: 1.75;
    color: var(--ink-soft);
    margin: 0;
}

.icon-roundel {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
}

.icon-roundel svg {
    width: 24px;
    height: 24px;
    stroke: var(--accent-text);
    fill: none;
    stroke-width: 1.6;
}

.value-pair__rule {
    width: 40px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    margin-bottom: 16px;
}

/* ---------- floating stat bar: small connector card straddling hero/section seam ---------- */
.stat-wrap {
    position: relative;
    z-index: 5;
    display: flex;
    justify-content: center;
}

.stat-bar {
    position: relative;
    margin-top: -34px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 18px 8px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    max-width: 1200px;
    width: 100%;
}

@media (max-width: 900px) {
    .stat-bar {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 18px;
    }
}

@media (max-width: 375px) {
    .stat-bar {
        grid-template-columns: 1fr;
        margin-top: -24px;
        row-gap: 14px;
        max-width: 320px;
    }
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
    padding: 0 14px;
    position: relative;
}

.stat-item .icon-roundel {
    width: 40px;
    height: 40px;
    margin-bottom: 0;
}

.stat-item .icon-roundel svg {
    width: 18px;
    height: 18px;
}

.stat-item + .stat-item {
    border-left: 1px solid var(--ink-faint);
}

@media (max-width: 900px) {
    .stat-item:nth-child(2n+1) {
        border-left: none;
    }

    .stat-item:nth-child(n+3) {
        border-top: 1px solid var(--ink-faint);
        padding-top: 16px;
    }
}

@media (max-width: 375px) {
    .stat-item {
        border-left: none !important;
    }

    .stat-item:not(:first-child) {
        border-top: 1px solid var(--ink-faint);
        padding-top: 14px;
    }
}

.stat-item__label {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 13.5px;
    line-height: 1.3;
    color: var(--ink);
}

.stat-item__sub {
    font-size: 12.5px;
    color: var(--ink-soft);
}

.page-hero {
    position: relative;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    padding-block: calc(var(--header-height) + 64px) 56px;
    background: var(--paper-alt);
    text-align: center;
}

.page-hero > .container {
    position: relative;
    z-index: 2;
}

.page-hero h1 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.2rem, 3.6vw, 3.2rem);
    text-transform: uppercase;
    letter-spacing: .01em;
    color: var(--ink);
    margin-bottom: 14px;
}

.page-hero p {
    max-width: 56ch;
    margin-inline: auto;
    font-size: 16px;
    line-height: 1.7;
    color: var(--ink-soft);
}

.page-hero__photo {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.page-hero__photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.page-hero__scrim {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: rgba(16, 16, 16, 0.76);
}

.page-hero--photo h1 {
    color: var(--white);
}

.page-hero--photo .hl {
    color: var(--accent);
}

.page-hero--photo p {
    color: rgba(255, 255, 255, .78);
}

.reveal {
    /* opacity: 0; */
    transform: translateY(32px);
    transition: opacity .8s cubic-bezier(.16, 1, .3, 1), transform .8s cubic-bezier(.16, 1, .3, 1);
}

.is-inview .reveal {
    opacity: 1;
    transform: translateY(0);
}

.reveal-d1 {
    transition-delay: .06s;
}

.reveal-d2 {
    transition-delay: .14s;
}

.reveal-d3 {
    transition-delay: .22s;
}

.reveal-d4 {
    transition-delay: .3s;
}

.reveal-d5 {
    transition-delay: .38s;
}

.closing-cta {
    position: relative;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    overflow: hidden;
    padding-block: var(--section-gap);
    background: var(--ink);
}

.closing-cta__photo {
    position: absolute;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.closing-cta__scrim {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: rgba(16, 16, 16, 0.781);
}

.closing-cta__inner {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.closing-cta h2 {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: clamp(1.8rem, 5.4vw, 4.4rem);
    line-height: 1.05;
    letter-spacing: -.01em;
    color: var(--white);
    text-wrap: balance;
    margin-bottom: 10px;
}

.text-accent-free {
    color: var(--accent);
}

.closing-cta__note {
    font-size: 16px;
    line-height: 1.6;
    max-width: 56ch;
    color: rgba(255, 255, 255, .78);
    margin-bottom: 34px;
}

.closing-cta__actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.section--padding-block-80 {
    padding-block: var(--section-gap-80);
}

.section--padding-block-64 {
    padding-block: var(--section-gap-64);
}

@media (max-width: 700px) {
    .closing-cta {
        padding-block: var(--section-gap-mobile);
    }
}

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 15px;
    border: 1.5px solid transparent;
    transition: transform var(--transition-base), box-shadow var(--transition-base),
        background-color var(--transition-base), color var(--transition-base),
        border-color var(--transition-base);
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn--accent {
    background: var(--accent);
    color: var(--ink);
}

.btn--accent:hover {
    background: var(--accent-dark);
    color: var(--ink);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background: transparent;
    border-color: var(--ink);
    color: var(--ink);
}

.btn--outline:hover {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--white);
}

.btn--outline-invert {
    background: transparent;
    border-color: rgba(255, 255, 255, .5);
    color: var(--white);
}

.btn--outline-invert:hover {
    background: var(--white);
    border-color: var(--white);
    color: var(--ink);
}

.btn--sm {
    /* 10px padding + 14px * 1.6 line-height = 42.4px tall, just under the 44px
       WCAG 2.5.5 touch-target floor. 11px clears it (44.4px) without visibly
       changing the button's proportions. */
    padding: 11px 20px;
    font-size: 14px;
}

.btn--block {
    width: 100%;
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- contact fab: site-wide quick-contact bubble ---------- */
.contact-fab {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 90;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-fab__options {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.contact-fab__option {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--white);
    border: 1px solid var(--ink-faint);
    color: var(--accent-text);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(12px) scale(.9);
    pointer-events: none;
    transition: opacity .3s cubic-bezier(.16, 1, .3, 1), transform .3s cubic-bezier(.16, 1, .3, 1);
}

.contact-fab__option svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
}

.contact-fab__option-text {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 12px;
}

.contact-fab.is-open .contact-fab__option {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.contact-fab__option:nth-child(1) {
    transition-delay: 0s;
}

.contact-fab.is-open .contact-fab__option:nth-child(1) {
    transition-delay: .04s;
}

.contact-fab__trigger {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--ink);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    position: relative;
    flex: none;
}

.contact-fab__icon {
    width: 24px;
    height: 24px;
    position: absolute;
    transition: opacity .25s ease, transform .25s ease;
}

.contact-fab__icon--close {
    opacity: 0;
    transform: scale(.6) rotate(-45deg);
}

.contact-fab.is-open .contact-fab__icon--open {
    opacity: 0;
    transform: scale(.6) rotate(45deg);
}

.contact-fab.is-open .contact-fab__icon--close {
    opacity: 1;
    transform: scale(1) rotate(0);
}

@media (max-width: 600px) {
    .contact-fab {
        right: 16px;
        bottom: 16px;
    }
}

/* ---------- success modal: centered celebratory confirmation ---------- */
.success-modal {
    position: fixed;
    inset: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .35s ease;
}

.success-modal.is-open {
    opacity: 1;
    pointer-events: auto;
}

.success-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(16, 16, 16, .75);
}

.success-modal__card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 48px 40px 40px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transform: translateY(28px) scale(.94);
    opacity: 0;
    transition: transform .5s cubic-bezier(.16, 1, .3, 1), opacity .5s ease;
}

.success-modal.is-open .success-modal__card {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.success-modal__close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--ink-faint);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-soft);
}

.success-modal__close svg {
    width: 14px;
    height: 14px;
}

.success-modal__badge {
    position: relative;
    width: 84px;
    height: 84px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.success-modal__badge::before {
    content: '';
    position: absolute;
    inset: -12px;
    border-radius: 50%;
    background: var(--accent-soft);
    z-index: -1;
    transform: scale(0);
    opacity: 0;
    transition: transform .6s cubic-bezier(.16, 1, .3, 1), opacity .6s ease;
    transition-delay: .1s;
}

.success-modal.is-open .success-modal__badge::before {
    transform: scale(1);
    opacity: 1;
}

.success-modal__badge svg {
    width: 38px;
    height: 38px;
}

.success-modal__check {
    stroke-dasharray: 30;
    stroke-dashoffset: 30;
    transition: stroke-dashoffset .5s cubic-bezier(.65, 0, .35, 1);
    transition-delay: .4s;
}

.success-modal.is-open .success-modal__check {
    stroke-dashoffset: 0;
}

.success-modal__card h2 {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 24px;
    letter-spacing: -.01em;
    color: var(--ink);
    margin: 0 0 10px;
}

.success-modal__card p {
    font-size: 14.5px;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 0 0 28px;
}

@media (max-width: 480px) {
    .success-modal__card {
        padding: 40px 26px 32px;
    }
}

.accordion-item {
    border-bottom: 1px solid var(--ink-faint);
}

.accordion-item:first-child {
    border-top: 1px solid var(--ink-faint);
}

.accordion-item__trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: 100%;
    padding: 20px 4px;
    background: none;
    border: 0;
    text-align: left;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 15.5px;
    color: var(--ink);
}

.accordion-item__icon {
    position: relative;
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--paper-alt);
    transition: background-color .4s cubic-bezier(.16, 1, .3, 1);
}

.accordion-item__trigger[aria-expanded="true"] .accordion-item__icon {
    background: var(--accent);
}

.accordion-item__icon::before,
.accordion-item__icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    background: var(--accent-text);
    transform: translate(-50%, -50%);
    transition: background-color .4s cubic-bezier(.16, 1, .3, 1);
}

.accordion-item__icon::before {
    width: 12px;
    height: 2px;
}

.accordion-item__icon::after {
    width: 2px;
    height: 12px;
    transition: transform .4s cubic-bezier(.16, 1, .3, 1), background-color .4s cubic-bezier(.16, 1, .3, 1);
}

.accordion-item__trigger[aria-expanded="true"] .accordion-item__icon::before,
.accordion-item__trigger[aria-expanded="true"] .accordion-item__icon::after {
    background: var(--ink);
}

.accordion-item__trigger[aria-expanded="true"] .accordion-item__icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

.accordion-item__panel {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows .55s cubic-bezier(.16, 1, .3, 1);
}

.accordion-item__trigger[aria-expanded="true"] + .accordion-item__panel {
    grid-template-rows: 1fr;
}

.accordion-item__panel-inner {
    overflow: hidden;
}

.accordion-item__panel-inner p {
    padding: 0 24px 20px 4px;
    margin: 0;
    font-size: 14.5px;
    line-height: 1.7;
    color: var(--ink-soft);
    opacity: 0;
    transform: translateY(-14px);
    transition: opacity .4s ease, transform .4s cubic-bezier(.16, 1, .3, 1);
}

.accordion-item__trigger[aria-expanded="true"] + .accordion-item__panel .accordion-item__panel-inner p {
    opacity: 1;
    transform: translateY(0);
}

.accordion--boxed .accordion-item {
    border: 1px solid var(--ink-faint);
    border-radius: var(--radius-lg);
    background: var(--paper);
    margin-bottom: 14px;
    overflow: hidden;
    transition: background-color .35s ease, border-color .35s ease;
}

.accordion--boxed .accordion-item:last-child {
    margin-bottom: 0;
}

.accordion--boxed .accordion-item:has(.accordion-item__trigger[aria-expanded="true"]) {
    background: var(--accent-soft);
    border-color: var(--accent-dark);
}

.accordion--boxed .accordion-item__trigger {
    padding: 22px 24px;
}

.accordion--boxed .accordion-item__panel-inner p {
    padding: 0 24px 22px;
}


::selection {
    background: var(--color-accent);
    color: var(--color-primary-dark);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Shared: inline text link inside running prose (section-head paragraphs, card copy). */
.inline-link {
    color: var(--accent-text);
    text-decoration: underline;
    text-underline-offset: 3px;
    font-weight: 600;
}

.inline-link:hover {
    text-decoration-thickness: 2px;
}

/* Shared: activity card (photo + dark overlay), used by the homepage carousel
   and the Hoạt động & Sự kiện archive grid. */
.activity-card {
    position: relative;
    flex: 0 0 auto;
    width: min(310px, 74vw);
    scroll-snap-align: start;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background: var(--paper-alt);
    text-decoration: none;
    color: inherit;
}

.activity-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s cubic-bezier(.16, 1, .3, 1);
}

.activity-card:hover img {
    transform: scale(1.06);
}

.activity-card__media-empty {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.activity-card__media-empty svg {
    width: 30%;
    opacity: .25;
}

.activity-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(16, 16, 16, .85) 0%, rgba(16, 16, 16, 0) 55%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 18px;
}

.activity-card__tag {
    align-self: flex-start;
    background: var(--accent);
    color: var(--ink);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    margin-bottom: 8px;
}

.activity-card__overlay h3 {
    color: #fff;
    font-size: 15px;
    margin-bottom: 0;
}

.activity-card__desc {
    color: rgba(255, 255, 255, .78);
    font-size: 12.5px;
    line-height: 1.5;
    margin: 6px 0 0;
}

.activity-card--more {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--paper-alt);
    border: 1.5px dashed var(--ink-faint);
    color: var(--ink);
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    padding: 24px;
    transition: background-color .3s ease, border-color .3s ease;
}

.activity-card--more:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
}

.activity-card--more svg {
    width: 26px;
    height: 26px;
}

.activities__empty {
    text-align: center;
    padding: 48px 24px;
    border: 1.5px dashed var(--ink-faint);
    border-radius: var(--radius-lg);
    color: var(--ink-soft);
    font-size: 14px;
}

.activities__footer {
    margin-top: 40px;
    text-align: center;
}