/* UKAV website · màu và chữ lấy từ tokens.css (brandbook), không gõ mã màu rời ở đây */

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { font-family: var(--font-text); font-size: 17px; line-height: var(--lh-body); color: var(--ink); background: var(--paper); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: var(--brand); }
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: var(--lh-tight); color: var(--brand); }
h2 { font-size: clamp(1.9rem, 4vw, 2.6rem); }
h3 { font-size: 1.35rem; }
em.mark { font-style: italic; text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 3px; text-underline-offset: 6px; }

/* song ngữ: html.en ẩn tiếng Việt, mặc định ẩn tiếng Anh */
html:not(.en) .en, html.en .vi { display: none !important; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }
section { padding: clamp(56px, 8vw, 96px) 0; }
.label { font: 700 0.8rem/1 var(--font-text); letter-spacing: .16em; text-transform: uppercase; color: var(--accent-txt); margin-bottom: 14px; }
.lead { font-size: 1.12rem; color: var(--u-ink-80); max-width: 720px; margin-top: 16px; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 24px; border-radius: 6px; font: 700 0.95rem/1 var(--font-text); text-decoration: none; letter-spacing: .02em; transition: transform .15s, background .15s; }
.btn:hover { transform: translateY(-1px); }
.btn-red { background: var(--accent); color: #fff; }
.btn-navy { background: var(--brand); color: #fff; }
.btn-line { border: 2px solid currentColor; color: var(--brand); }
.btn-ghost { border: 2px solid rgba(255,255,255,.8); color: #fff; }

/* header */
.top { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--rule); }
.top .wrap { display: flex; align-items: center; gap: 24px; height: 68px; }
.top .logo img { height: 34px; width: auto; }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { font: 600 0.92rem/1 var(--font-text); color: var(--ink); text-decoration: none; }
.nav a:hover { color: var(--brand); }
.lang { display: flex; border: 1px solid var(--rule); border-radius: 6px; overflow: hidden; }
.lang button { font: 700 0.78rem/1 var(--font-text); padding: 8px 10px; border: 0; background: #fff; color: var(--ink-muted); cursor: pointer; }
.lang button[aria-pressed="true"] { background: var(--brand); color: #fff; }
.top .btn { padding: 11px 16px; font-size: 0.85rem; }
.menu { display: none; margin-left: auto; background: none; border: 0; font-size: 1.6rem; color: var(--brand); cursor: pointer; }

/* hero */
.hero { position: relative; min-height: min(88vh, 760px); display: flex; align-items: flex-end; color: #fff; padding: 0 0 clamp(48px, 7vw, 88px); }
.hero .bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 35%; }
.hero .vid-toggle { position: absolute; right: 16px; bottom: 16px; z-index: 2; width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,.5); background: rgba(11,31,51,.45); color: #fff; cursor: pointer; display: grid; place-items: center; padding: 0; }
.hero .vid-toggle svg { width: 14px; height: 14px; fill: currentColor; }
.hero .vid-toggle .i-play, .hero .vid-toggle[aria-pressed="true"] .i-pause { display: none; }
.hero .vid-toggle[aria-pressed="true"] .i-play { display: block; }
.hero .vid-toggle:hover { background: rgba(11,31,51,.7); }
.hero::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(11,31,51,.88) 0%, rgba(4,76,116,.62) 45%, rgba(4,76,116,.12) 100%), linear-gradient(180deg, rgba(11,31,51,0) 55%, rgba(11,31,51,.7) 100%); }
.hero .wrap { position: relative; z-index: 1; }
.hero .label { color: #fff; opacity: .9; }
.hero h1 { color: #fff; font-size: clamp(2.6rem, 7vw, 4.6rem); max-width: 860px; }
.hero h1 em { font-style: italic; }
.hero p { font-size: clamp(1.05rem, 2vw, 1.3rem); max-width: 640px; margin-top: 18px; color: #EEF3F7; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.stats { display: flex; gap: clamp(24px, 5vw, 64px); margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.3); flex-wrap: wrap; }
.stats b { display: block; font: 700 clamp(1.8rem, 4vw, 2.4rem)/1 var(--font-display); }
.stats span { font-size: .9rem; color: #DCE6EE; }

/* about */
.about .grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.about .story p { margin-top: 16px; color: var(--u-ink-80); }
.about .story p.promise { font-family: var(--font-display); font-style: italic; font-size: 1.35rem; color: var(--brand); }
.about figure img { border-radius: 10px; aspect-ratio: 3/2; object-fit: cover; width: 100%; }
.vision { background: var(--u-mist); }
.vision ol { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 36px; counter-reset: v; }
.vision li { background: #fff; border-radius: 10px; padding: 28px 24px; counter-increment: v; }
.vision li::before { content: '0' counter(v); display: block; font: 700 1.6rem/1 var(--font-display); color: var(--accent); margin-bottom: 14px; }
.values { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.values span { background: #fff; border: 1px solid var(--rule); border-radius: 40px; padding: 10px 18px; font-weight: 600; font-size: .95rem; }
.values span b { color: var(--brand); }

/* pillars */
.pillars .cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.card { border-radius: 10px; overflow: hidden; background: #fff; border: 1px solid var(--rule); display: flex; flex-direction: column; }
.card img { aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.card div { padding: 22px 22px 26px; }
.card h3 { font-family: var(--font-text); font-size: 1.15rem; }
.card h3 small { display: block; font: 700 .72rem/1 var(--font-text); letter-spacing: .14em; text-transform: uppercase; color: var(--accent-txt); margin-bottom: 8px; }
.card p { margin-top: 10px; font-size: .97rem; color: var(--u-ink-80); }
.tag { display: inline-block; margin-top: 12px; font: 700 .72rem/1 var(--font-text); letter-spacing: .1em; text-transform: uppercase; color: var(--brand); background: var(--u-mist); padding: 7px 10px; border-radius: 4px; }

/* events */
.events { background: var(--brand); color: #fff; }
.events h2, .events .label { color: #fff; }
.events .lead { color: #DCE6EE; }
.ev-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 40px; }
.ev { background: #fff; color: var(--ink); border-radius: 12px; overflow: hidden; display: grid; grid-template-rows: auto 1fr; }
.ev img { aspect-ratio: 16/9; object-fit: cover; width: 100%; }
.ev .body { padding: 26px 26px 30px; display: flex; flex-direction: column; }
.ev .when { font: 700 .8rem/1.3 var(--font-text); letter-spacing: .1em; text-transform: uppercase; color: var(--accent-txt); }
.ev h3 { font-size: 1.6rem; margin-top: 8px; }
.ev ul { list-style: none; margin: 16px 0 22px; font-size: .97rem; color: var(--u-ink-80); }
.ev li { padding: 4px 0 4px 28px; position: relative; }
.ev li span.i { position: absolute; left: 0; }
.ev .btn { margin-top: auto; align-self: flex-start; }
.no-ev { display: none; margin-top: 32px; font-size: 1.1rem; color: #DCE6EE; }
.no-ev a { color: #fff; }

/* humans */
.humans .grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.quote { font: 600 clamp(1.4rem, 3vw, 1.9rem)/1.35 var(--font-text); color: var(--brand); margin-top: 20px; }
.quote::before { content: '“'; display: block; font: 700 4rem/0.6 var(--font-display); color: var(--accent); margin-bottom: 6px; }
.humans .btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.polaroids { position: relative; height: 480px; }
.polaroids figure { position: absolute; background: #fff; padding: 12px 12px 44px; box-shadow: 0 18px 40px rgba(11,31,51,.18); width: 62%; }
.polaroids figure img { aspect-ratio: 1; object-fit: cover; width: 100%; }
.polaroids figure:nth-child(1) { left: 0; top: 10px; transform: rotate(-5deg); }
.polaroids figure:nth-child(2) { right: 0; top: 120px; transform: rotate(4deg); }

/* gallery */
.gallery { padding: 0; }
.strip { display: grid; grid-template-columns: repeat(8, 1fr); }
.strip img { aspect-ratio: 1; object-fit: cover; width: 100%; }

/* join */
.join .box { background: var(--u-mist); border-radius: 16px; padding: clamp(32px, 5vw, 56px); display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.join ul { list-style: none; margin-top: 20px; }
.join li { padding: 8px 0 8px 32px; position: relative; color: var(--u-ink-80); }
.join li::before { content: '✓'; position: absolute; left: 0; color: var(--brand); font-weight: 800; }
.join .side { background: #fff; border-radius: 12px; padding: 30px; }
.join .side p { color: var(--u-ink-80); margin: 10px 0 22px; }
.join .side p.zalo { margin: 18px 0 0; font-size: .92rem; }
.join .side p.zalo a { font-weight: 700; }
.partners { margin-top: 48px; text-align: center; }
.partners p { font: 700 .78rem/1 var(--font-text); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-muted); }
.partners div { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; margin-top: 18px; font: 700 1.2rem/1.3 var(--font-display); color: var(--brand); }

/* footer */
footer { background: var(--u-ink); color: #DCE6EE; padding: 64px 0 32px; }
footer .grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
footer img { height: 40px; width: auto; }
footer p { margin-top: 16px; font-size: .95rem; }
footer h4 { font: 700 .8rem/1 var(--font-text); letter-spacing: .14em; text-transform: uppercase; color: #fff; margin-bottom: 16px; }
footer a { color: #fff; text-decoration: none; display: block; padding: 4px 0; }
footer a:hover { text-decoration: underline; }
footer .tagline { font: italic 700 1.25rem/1.3 var(--font-display); color: #fff; margin-top: 18px; }
footer .base { margin-top: 48px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.15); font-size: .85rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* mobile */
@media (max-width: 960px) {
  .pillars .cards { grid-template-columns: repeat(2, 1fr); }
  .strip { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 820px) {
  .nav, .top .btn { display: none; }
  .menu { display: block; }
  .lang { margin-left: 0; }
  .top.open .nav { display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: #fff; padding: 12px 16px 20px; gap: 0; border-bottom: 1px solid var(--rule); }
  .top.open .nav a { padding: 14px 0; border-bottom: 1px solid var(--u-navy-08); font-size: 1rem; }
  .about .grid, .humans .grid, .join .box, footer .grid { grid-template-columns: 1fr; }
  .vision ol, .ev-list { grid-template-columns: 1fr; }
  .about figure { order: -1; }
  .polaroids { height: 360px; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .pillars .cards { grid-template-columns: 1fr; }
  .top .logo img { height: 28px; }
}