/* ADC Vietnam — shared design system (header, footer, tokens, news components) */
:root{
  --blue:#1F3FA1; --blue-deep:#15265c; --blue-deeper:#0f1c47;
  --gold:#D4A028; --gold-soft:#E2BC63;
  --ink:#1b1d24; --muted:#585f72; --muted-2:#7c8295;
  --bg:#FBFAF7; --bg-alt:#F2F0E9; --line:#E6E2D7; --line-2:#d9d4c6; --white:#fff;
  --font-display:'Playfair Display',Georgia,'Times New Roman',serif;
  --font-sans:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --container:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
[data-lang="vi"] .en{display:none}
[data-lang="en"] .vi{display:none}
.container{max-width:var(--container);margin:0 auto;padding:0 28px}
h1,h2,h3{font-family:var(--font-display);font-weight:700;line-height:1.1;letter-spacing:-.01em}
a{color:inherit}
.eyebrow{font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;font-weight:600;color:var(--gold);margin-bottom:1.1rem}
.eyebrow.blue{color:var(--blue)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;font-family:var(--font-sans);font-weight:600;font-size:.92rem;padding:13px 26px;border-radius:999px;cursor:pointer;text-decoration:none;border:1px solid transparent;transition:.22s ease;white-space:nowrap}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-deep);transform:translateY(-1px);box-shadow:0 12px 28px rgba(31,63,161,.22)}
.btn-ghost{background:transparent;color:var(--blue);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--blue);background:rgba(31,63,161,.04)}
.btn-gold{background:var(--gold);color:#231a02}
.btn-gold:hover{background:var(--gold-soft);transform:translateY(-1px);box-shadow:0 12px 28px rgba(212,160,40,.28)}
.btn-sm{padding:9px 18px;font-size:.85rem}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(251,250,247,.82);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:38px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{color:var(--ink);text-decoration:none;font-size:.92rem;font-weight:500;opacity:.82;transition:opacity .2s,color .2s}
.nav-links a:hover,.nav-links a.active{opacity:1;color:var(--blue)}
.nav-right{display:flex;align-items:center;gap:18px}
.lang{display:flex;align-items:center;border:1px solid var(--line-2);border-radius:999px;overflow:hidden}
.lang button{border:0;background:transparent;font-family:var(--font-sans);font-size:.78rem;font-weight:600;letter-spacing:.04em;color:var(--muted-2);padding:6px 12px;cursor:pointer;transition:.2s}
.lang button.active{background:var(--blue);color:#fff}
.nav-cta{display:inline-flex}

/* footer */
footer{background:var(--bg);border-top:1px solid var(--line);padding:48px 0 40px}
.foot{display:flex;justify-content:space-between;align-items:flex-start;gap:30px;flex-wrap:wrap}
.foot-lockup{margin-bottom:1.1rem}
.foot-logo{height:46px;width:auto;display:block;margin-bottom:.8rem}
.foot-tagline{font-family:var(--font-display);font-size:1.04rem;font-weight:600;color:var(--blue);position:relative;padding-top:.75rem;max-width:34ch;line-height:1.3}
.foot-tagline::before{content:"";position:absolute;top:0;left:0;width:54px;height:2px;background:var(--gold)}
.foot-brand .fn{font-size:.8rem;color:var(--muted-2);font-weight:500;white-space:nowrap;line-height:1.5}
.foot-eco{font-size:.86rem;color:var(--muted)}
.foot-eco .eh{font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted-2);font-weight:600;margin-bottom:.7rem}
.foot-eco a{color:var(--blue);text-decoration:none;font-weight:500;display:block;margin-bottom:.35rem}
.foot-eco a:hover{color:var(--gold)}
.foot-bottom{margin-top:36px;padding-top:24px;border-top:1px solid var(--line);font-size:.78rem;color:var(--muted-2);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* news cards (shared by home + list) */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{background:var(--white);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;transition:.28s ease;text-decoration:none;color:inherit}
.news-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(27,29,36,.08);border-color:var(--line-2)}
.news-cover{aspect-ratio:16/9;width:100%;object-fit:cover;background:var(--bg-alt);display:block}
.news-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.news-meta{display:flex;align-items:center;gap:10px;margin-bottom:1rem}
.news-tag{font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;color:var(--blue);background:rgba(31,63,161,.07);border-radius:999px;padding:4px 11px}
.news-date{font-size:.78rem;color:var(--muted-2);font-weight:500}
.news-card h3{font-size:1.14rem;font-weight:700;color:var(--blue-deep);margin-bottom:.55rem;line-height:1.3}
.news-card p{font-size:.9rem;color:var(--muted);line-height:1.56;margin-bottom:1.1rem;flex:1}
.news-src{font-size:.78rem;font-weight:600;color:var(--gold)}

@media(max-width:920px){ .news-grid{grid-template-columns:1fr} }
@media(max-width:680px){ .nav-links{display:none} .nav-cta{display:none} .foot{flex-direction:column} }
@media(prefers-reduced-motion:reduce){ .reveal{opacity:1;transform:none;transition:none} html{scroll-behavior:auto} }