:root {
  --bg: #f7efe3;
  --bg-2: #fffaf2;
  --ink: #3a2418;
  --ink-soft: #6f5444;
  --orange: #c4621f;
  --orange-deep: #9e4612;
  --tan: #e8b86a;
  --teal: #a9cfcb;
  --pink: #e8c4bf;
  --sky: #c9dbe3;
  --line: rgba(58, 36, 24, .12);
  --radius: 22px;
  --shadow: 0 18px 40px -22px rgba(90, 50, 20, .45);
  --display: "Baloo 2", system-ui, sans-serif;
  --body: "Be Vietnam Pro", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1f1611; --bg-2: #2a1e17; --ink: #f6e9da; --ink-soft: #cdb6a3;
    --orange: #ec8a45; --orange-deep: #f2a26a; --line: rgba(246, 233, 218, .14);
    --teal: #3e6663; --pink: #6b4743; --sky: #3c5561; --tan: #8a6730;
    --shadow: 0 18px 40px -22px rgba(0, 0, 0, .8);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { font-family: var(--body); background: var(--bg); color: var(--ink); line-height: 1.65; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); line-height: 1.12; }
section { padding: clamp(64px, 9vw, 112px) clamp(16px, 5vw, 64px); max-width: 1200px; margin: 0 auto; }

/* nav */
.nav { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; padding: 12px clamp(16px, 5vw, 64px); background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--display); font-weight: 800; font-size: 1.25rem; color: var(--orange-deep); }
.brand em { font-style: normal; color: var(--ink-soft); font-weight: 600; }
.nav ul { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav ul a { text-decoration: none; font-weight: 500; }
.nav ul a:not(.btn):hover { color: var(--orange); }
.nav-toggle { display: none; font: 600 .95rem var(--body); background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 999px; padding: 8px 16px; cursor: pointer; }

/* buttons */
.btn { display: inline-block; text-decoration: none; font-weight: 600; background: var(--orange); color: #fff; padding: 14px 26px; border-radius: 999px; box-shadow: var(--shadow); transition: transform .2s, background .2s; }
.btn:hover { transform: translateY(-2px); background: var(--orange-deep); }
.btn-small { padding: 9px 18px; box-shadow: none; }
.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); box-shadow: none; }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }
.btn-light { background: #fff; color: var(--orange-deep); }
.btn-light:hover { background: #fff3e6; }

/* hero */
.eyebrow { font-weight: 600; text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; color: var(--orange); margin-bottom: 14px; }
.hero { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 48px; padding-top: clamp(40px, 7vw, 88px); }
.hero h1 { font-size: clamp(2.4rem, 5.2vw, 4.3rem); font-weight: 800; }
.hero h1 span { white-space: nowrap; }
h1, h2 { text-wrap: balance; }
.hero h1 span { color: var(--orange); }
.lead { font-size: clamp(1.02rem, 1.4vw, 1.18rem); color: var(--ink-soft); margin: 22px 0 32px; max-width: 34em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }
.stats { display: flex; flex-wrap: wrap; gap: 34px; margin-top: 44px; }
.stats dt { font-family: var(--display); font-weight: 800; font-size: 2.1rem; color: var(--orange-deep); line-height: 1; }
.stats dd { font-size: .9rem; color: var(--ink-soft); }

.hero-art { position: relative; aspect-ratio: 1; }
.hero-art img { width: 100%; aspect-ratio: 1; object-fit: cover; position: relative; z-index: 2; border-radius: 50%; box-shadow: var(--shadow); animation: float 7s ease-in-out infinite; }
.blob { position: absolute; border-radius: 50%; filter: blur(2px); z-index: 1; }
.b1 { width: 55%; height: 55%; background: var(--teal); top: -6%; right: -8%; }
.b2 { width: 45%; height: 45%; background: var(--pink); bottom: -6%; left: -8%; }
.b3 { width: 28%; height: 28%; background: var(--tan); bottom: 4%; right: 2%; opacity: .7; }
.note { position: absolute; z-index: 3; font-size: clamp(1.8rem, 3.5vw, 2.8rem); color: var(--orange); animation: bob 4s ease-in-out infinite; }
.n1 { top: 4%; left: 6%; } .n2 { top: 38%; right: -4%; animation-delay: -1.3s; } .n3 { bottom: 10%; left: 18%; animation-delay: -2.6s; }
@keyframes float { 50% { transform: translateY(-14px) rotate(-2deg); } }
@keyframes bob { 50% { transform: translateY(-12px) rotate(10deg); } }

/* section heads */
.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head h2 { font-size: clamp(2rem, 4.2vw, 3.1rem); font-weight: 800; }

/* about */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.about-lead { font-size: 1.15rem; }
.values { list-style: none; display: grid; gap: 14px; }
.values li { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; display: grid; gap: 2px; }
.values strong { font-family: var(--display); font-size: 1.2rem; color: var(--orange-deep); }
.values span { color: var(--ink-soft); }

/* timeline */
.timeline { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: m; }
.timeline li { position: relative; background: var(--bg-2); border-radius: var(--radius); padding: 26px 24px; border: 1px solid var(--line); transition: transform .25s, box-shadow .25s; }
.timeline li:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.timeline li::before { counter-increment: m; content: "0" counter(m); position: absolute; top: 14px; right: 20px; font-family: var(--display); font-weight: 800; font-size: 2.6rem; color: var(--line); }
.when { display: inline-block; font-size: .8rem; font-weight: 600; background: var(--sky); color: var(--ink); padding: 4px 12px; border-radius: 999px; margin-bottom: 12px; }
.timeline h3 { font-size: 1.35rem; margin-bottom: 6px; }
.timeline p { color: var(--ink-soft); font-size: .96rem; }

/* activity cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.card { border-radius: var(--radius); padding: 28px 24px; }
.card .icon { font-size: 2rem; display: block; margin-bottom: 14px; }
.card h3 { font-size: 1.35rem; margin-bottom: 8px; }
.card p { font-size: .95rem; }
.c-orange { background: color-mix(in srgb, var(--orange) 18%, var(--bg-2)); }
.c-teal { background: color-mix(in srgb, var(--teal) 55%, var(--bg-2)); }
.c-pink { background: color-mix(in srgb, var(--pink) 60%, var(--bg-2)); }
.c-sand { background: color-mix(in srgb, var(--tan) 40%, var(--bg-2)); }

/* teams */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 2px solid var(--ink); }
.team-grid article { padding: 26px 22px 8px 0; }
.team-grid article + article { padding-left: 22px; border-left: 1px solid var(--line); }
.team-grid h3 { font-size: 1.5rem; color: var(--orange-deep); margin-bottom: 8px; }
.team-grid p { color: var(--ink-soft); }

/* tường ảnh lục giác (marquee 2 hàng chạy ngược chiều) */
.moments { padding-bottom: 32px; }
.hex-wall { --w: 230px; --gap: 26px; display: grid; gap: 22px; padding: 8px 0 clamp(64px, 9vw, 112px); overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent); mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent); }
.hex-row { overflow: hidden; }
.hex-row.reverse { margin-left: calc((var(--w) + var(--gap)) / -2); }
.hex-track { display: flex; width: max-content; animation: marquee 60s linear infinite; }
.hex-row.reverse .hex-track { animation-direction: reverse; animation-duration: 54s; }
.hex-wall:hover .hex-track, .hex-wall:focus-within .hex-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.hex { flex: 0 0 var(--w); aspect-ratio: 100 / 115.47; margin-right: var(--gap); padding: 0; border: 0; background: var(--bg-2); cursor: zoom-in;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 115.47'%3E%3Cpath d='M37.9,7.0Q50,0 62.1,7.0L87.9,21.9Q100,28.87 100.0,42.9L100.0,72.6Q100,86.6 87.9,93.6L62.1,108.5Q50,115.47 37.9,108.5L12.1,93.6Q0,86.6 0.0,72.6L0.0,42.9Q0,28.87 12.1,21.9Z'/%3E%3C/svg%3E") center / 100% 100% no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 115.47'%3E%3Cpath d='M37.9,7.0Q50,0 62.1,7.0L87.9,21.9Q100,28.87 100.0,42.9L100.0,72.6Q100,86.6 87.9,93.6L62.1,108.5Q50,115.47 37.9,108.5L12.1,93.6Q0,86.6 0.0,72.6L0.0,42.9Q0,28.87 12.1,21.9Z'/%3E%3C/svg%3E") center / 100% 100% no-repeat; transition: transform .35s ease, filter .35s ease; }
.hex img { width: 100%; height: 100%; object-fit: cover; }
.hex:hover, .hex:focus-visible { transform: scale(1.06); filter: saturate(1.15); }

/* lightbox */
.lightbox { margin: auto; border: 0; padding: 0; background: transparent; max-width: min(92vw, 1200px); max-height: 92vh; overflow: visible; }
.lightbox::backdrop { background: rgba(20, 12, 8, .86); backdrop-filter: blur(4px); }
.lightbox img { max-width: min(92vw, 1200px); max-height: 82vh; width: auto; border-radius: 18px; margin: 0 auto; }
.lb-cap { text-align: center; color: #fff; margin-top: 12px; font-weight: 500; }
.lb-btn, .lb-close { position: fixed; border: 0; border-radius: 50%; background: rgba(255, 255, 255, .92); color: #3a2418; cursor: pointer; display: grid; place-items: center; }
.lb-btn { top: 50%; translate: 0 -50%; width: 48px; height: 48px; font-size: 2rem; padding-bottom: 4px; }
.lb-prev { left: 16px; } .lb-next { right: 16px; }
.lb-close { top: 16px; right: 16px; width: 40px; height: 40px; font-size: 1.1rem; }

/* join */
.join-box { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; background: linear-gradient(135deg, var(--orange), var(--orange-deep)); color: #fff; border-radius: 32px; padding: clamp(32px, 5vw, 64px); box-shadow: var(--shadow); }
.join-box .eyebrow { color: #ffe2c6; }
.join-box h2 { font-size: clamp(1.9rem, 3.8vw, 2.8rem); margin-bottom: 14px; }
.join-box p { margin-bottom: 26px; opacity: .92; }
.steps { list-style: none; display: grid; gap: 12px; counter-reset: s; }
.steps li { display: grid; grid-template-columns: 44px 1fr; column-gap: 14px; background: rgba(255, 255, 255, .12); border-radius: 16px; padding: 14px 18px; }
.steps li::before { counter-increment: s; content: counter(s); grid-row: span 2; width: 44px; height: 44px; border-radius: 50%; background: #fff; color: var(--orange-deep); display: grid; place-items: center; font-family: var(--display); font-weight: 800; font-size: 1.3rem; }
.steps b { font-family: var(--display); font-size: 1.15rem; }
.steps span { font-size: .92rem; opacity: .9; }

/* footer */
.footer { max-width: 1200px; margin: 0 auto; padding: 40px clamp(16px, 5vw, 64px) 48px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; border-top: 1px solid var(--line); }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand div { display: grid; }
.footer-brand span, .copy { color: var(--ink-soft); font-size: .9rem; }
.footer a { font-weight: 600; color: var(--orange-deep); }
.copy { width: 100%; }

/* reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  .hex-row { overflow-x: auto; }
}

/* responsive */
@media (max-width: 960px) {
  .hero, .about-grid, .join-box { grid-template-columns: 1fr; }
  .hero-art { max-width: 420px; margin: 0 auto; width: 100%; }
  .timeline { grid-template-columns: 1fr 1fr; }
  .cards, .team-grid { grid-template-columns: 1fr 1fr; }
  .team-grid article:nth-child(3) { padding-left: 0; border-left: 0; }
  .hex-wall { --w: 180px; --gap: 18px; gap: 16px; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav ul { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
  .nav ul.open { display: flex; }
  .nav ul li a { display: block; padding: 12px 4px; }
  .nav ul .btn { text-align: center; margin-top: 8px; }
}
@media (max-width: 560px) {
  .timeline, .cards, .team-grid { grid-template-columns: 1fr; }
  .team-grid article, .team-grid article + article { padding: 20px 0 8px; border-left: 0; border-top: 1px solid var(--line); }
  .hex-wall { --w: 132px; --gap: 12px; gap: 12px; }
  .lb-btn { width: 40px; height: 40px; font-size: 1.6rem; }
  .stats { gap: 22px; }
}