/* Huy Bản Sắc — men lam, mực chàm, men trắng. Bố cục: một cột rõ ràng trên điện thoại, chữ Lora cho tiêu đề. */
:root{
  --surface:#f4f6f8; --raised:#ffffff; --line:#d5dce5;
  --ink:#16223a; --muted:#5b6678;
  --lam:#1f4fa3; --lam-soft:#dce5f4; --on-lam:#ffffff;
  --sanh:#7a4b2e; --sanh-soft:#efe2d8; --dat:#a97a22;
  --serif:"Lora",Georgia,"Times New Roman",serif;
  --sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --wrap:1160px; --r:10px; color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--surface);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--lam);text-underline-offset:3px}
a:hover{color:var(--ink)}
:focus-visible{outline:2px solid var(--lam);outline-offset:3px}
h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:1.15;margin:0;color:var(--ink);text-wrap:balance}
p{margin:0}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
.narrow{max-width:760px}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;background:var(--raised);padding:8px 12px;z-index:30}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--sanh)}
.muted{color:var(--muted)}.small{font-size:14px}
.more{font-weight:600;text-decoration:none;white-space:nowrap}

/* header */
.site-head{background:var(--raised);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:10px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand span{font-family:var(--serif);font-weight:700;font-size:22px;letter-spacing:.005em}
.nav{display:flex;align-items:center;gap:22px;font-size:15px}
.nav a{color:var(--ink);text-decoration:none;padding-block:6px}
.nav a[aria-current="page"]:not(.btn){color:var(--lam);box-shadow:inset 0 -2px 0 var(--lam)}
.lang{font-size:13px;border:1px solid var(--line);border-radius:6px;padding:4px 10px!important;color:var(--muted)!important}
.menu{display:none}
.menu summary{list-style:none;cursor:pointer;border:1px solid var(--line);border-radius:8px;padding:7px 14px;font-size:15px;font-weight:500}
.menu summary::-webkit-details-marker{display:none}
.menu nav{display:flex;flex-direction:column;gap:0;padding:8px 0 12px}
.menu nav a{color:var(--ink);text-decoration:none;padding:12px 0;border-bottom:1px solid var(--line);font-size:16px}
.menu nav .btn{margin-top:12px;border-bottom:0;justify-content:center;color:var(--on-lam)}
.menu nav .lang{margin-top:10px;align-self:flex-start}
@media (max-width:900px){.nav{display:none}.menu{display:block}.bar{flex-wrap:wrap}.menu[open]{width:100%}}

/* buttons */
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:16px;text-decoration:none;padding:12px 20px;border-radius:8px;background:var(--lam);color:var(--on-lam);border:1px solid var(--lam);min-height:46px}
.btn:hover{background:#183f84;color:var(--on-lam)}
.btn.ghost{background:transparent;color:var(--lam)}
.btn.ghost:hover{background:var(--lam-soft);color:var(--ink)}
.btn.sm{padding:7px 14px;min-height:0;font-size:15px;color:var(--on-lam)!important}

/* band */
.band{height:44px;background:url("/img/manh-su.svg") repeat-x left center/auto 44px;margin-top:56px}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:48px;align-items:center;padding-block:56px 40px}
.hero h1{font-size:clamp(38px,6vw,68px);margin-top:14px}
.intro{font-size:19px;color:var(--muted);margin-top:18px;max-width:36em}
.hero-img{margin:0;position:relative}
.hero-img img{width:100%;border-radius:var(--r);aspect-ratio:1/1;object-fit:cover}
.hero-img::after{content:"";position:absolute;left:-14px;right:28px;bottom:-22px;height:44px;background:url("/img/manh-su.svg") repeat-x left center/auto 44px;z-index:-1}
@media (max-width:900px){.hero{grid-template-columns:1fr;gap:32px;padding-block:32px 24px}.hero-img{max-width:520px}}

/* quote */
.quote{background:var(--ink);color:#e6ebf2;padding-block:64px;margin-top:40px}
.quote .eyebrow{color:#d29b74}
.quote blockquote{font-family:var(--serif);font-size:clamp(23px,3vw,32px);line-height:1.35;margin:14px 0 18px;color:#ffffff}
.quote p{color:#c9d2df}.quote .more{color:#9fbaf0}

/* sections */
.section{padding-block:56px}
.surface{background:var(--raised);border-block:1px solid var(--line)}
.section h2,.page-head h1{font-size:clamp(28px,3.6vw,42px)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px 24px;margin-bottom:24px}
.section-head p{margin-top:8px;max-width:40em}
.small-h{font-size:24px!important;margin-bottom:16px}
.page-head{padding-block:44px 24px}
.page-head .intro{max-width:40em}

/* gallery */
.gallery{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.gallery a{display:block}
.gallery img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--r);background:var(--lam-soft)}
.cap{margin-top:8px;display:flex;flex-direction:column;line-height:1.35}
.cap b{font-weight:600;font-size:15px}.cap span{font-size:13px;color:var(--muted)}
@media (max-width:760px){.gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}}

/* values */
.values{list-style:none;margin:24px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.values li{border-top:3px solid var(--lam);padding-top:16px}
.values h3{font-size:21px;margin-bottom:8px}
.values p{color:var(--muted)}
@media (max-width:820px){.values{grid-template-columns:1fr}}

/* cards */
.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.cards a{display:flex;flex-direction:column;gap:8px;height:100%;padding:20px;border-radius:var(--r);background:var(--raised);border:1px solid var(--line);text-decoration:none;color:var(--ink)}
.cards a:hover{border-color:var(--lam)}
.cards h3{font-size:21px}
.cards p{color:var(--muted);font-size:15.5px}
.cards .go{margin-top:auto;color:var(--lam);font-weight:600;font-size:14px}
@media (max-width:700px){.cards{grid-template-columns:1fr}}

/* visit */
.visit{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:end;background:var(--lam-soft);border-radius:14px;padding:28px}
.visit h2{font-size:28px;margin:6px 0 14px}
.nap2{margin:0 0 10px;display:grid;gap:8px}
.nap2 div{display:grid;grid-template-columns:120px 1fr;gap:10px}
.nap2 dt{font-size:13px;font-weight:600;color:var(--muted);padding-top:3px}
.nap2 dd{margin:0;font-weight:500}
@media (max-width:760px){.visit{grid-template-columns:1fr;padding:22px}.nap2 div{grid-template-columns:1fr;gap:0}}

/* about */
.about-grid{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:56px;padding-bottom:40px}
.portrait{margin:0}.portrait img{border-radius:var(--r);width:100%}
.tl-h{font-size:24px;margin:32px 0 12px}
.timeline{list-style:none;margin:0;padding:0;border-left:2px solid var(--lam-soft)}
.timeline li{position:relative;padding:0 0 18px 20px}
.timeline li::before{content:"";position:absolute;left:-7px;top:6px;width:12px;height:12px;background:var(--lam);transform:rotate(12deg)}
.timeline .yr{font-family:var(--serif);font-weight:700;font-size:18px;color:var(--lam)}
.timeline p{color:var(--muted);font-size:15.5px}
.rules{padding-left:20px}.rules li{margin:8px 0}
figure.inline{margin:28px 0}
figure.inline img{border-radius:var(--r);width:100%}
figcaption{font-size:14px;color:var(--muted);margin-top:8px}
@media (max-width:900px){.about-grid{grid-template-columns:1fr;gap:24px}.portrait{max-width:420px}}

/* prose / article */
.prose{max-width:68ch}
.prose > * + *{margin-top:1em}
.prose h2{font-size:clamp(23px,2.6vw,29px);margin-top:1.8em}
.prose .lede{font-size:20px;line-height:1.6;color:var(--ink)}
.prose ul,.prose ol{padding-left:1.25em}
.prose li + li{margin-top:.45em}
.article-head{padding-block:40px 20px;max-width:880px}
.article-head h1{font-size:clamp(32px,4.6vw,52px);margin-top:10px}
.byline{font-size:14px;color:var(--muted);margin-top:14px}
.byline a{color:var(--muted)}
.sources{margin-top:48px;padding-top:20px;border-top:1px solid var(--line);max-width:68ch}
.sources h2{font-family:var(--sans);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--sanh)}
.sources ol{font-size:14.5px;color:var(--muted);padding-left:1.3em;margin-top:12px}
.sources li + li{margin-top:6px}
.sources a{color:var(--muted);word-break:break-word}

/* steps & faq */
.steps{list-style:none;margin:20px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;counter-reset:s}
.steps li{counter-increment:s;background:var(--raised);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.steps li::before{content:counter(s);display:block;font-family:var(--serif);font-weight:700;font-size:36px;line-height:1;color:var(--lam);margin-bottom:10px}
.steps h3{font-size:19px;margin-bottom:6px}
.steps p{color:var(--muted);font-size:15.5px}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}
.surface p + p{margin-top:12px}
.surface h2{margin-bottom:14px}
.faq{margin-top:16px}
.faq details{border-top:1px solid var(--line);padding-block:16px}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--lam);font-size:22px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);margin-top:8px}

/* cta */
.cta{background:var(--lam);color:var(--on-lam);padding-block:48px;margin-top:24px}
.cta .inner{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px 40px;align-items:center}
.cta h2{color:#fff;font-size:clamp(26px,3.2vw,36px)}
.cta p{color:#dce5f4;margin-top:8px;max-width:40em}
.cta .actions{margin-top:0}
.cta .btn{background:#fff;color:var(--lam);border-color:#fff}
.cta .btn.ghost{background:transparent;color:#fff;border-color:#c5d4f0}
@media (max-width:760px){.cta .inner{grid-template-columns:1fr}}

/* crumbs */
.crumbs{font-size:13px;color:var(--muted);padding-top:18px;display:flex;flex-wrap:wrap;gap:6px}
.crumbs a{color:var(--muted);text-decoration:none}

/* footer */
.site-foot{background:var(--ink);color:#c9d2df;padding-block:44px 28px;font-size:15px}
.site-foot a{color:#e6ebf2;text-decoration:none}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.brandline{font-family:var(--serif);font-weight:700;font-size:26px;color:#fff}
.site-foot .muted{color:#9ba6b7}
.nap{margin-top:14px;line-height:1.7}
.site-foot h2{font-family:var(--sans);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#d29b74;margin-bottom:10px}
.site-foot ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.copy{margin-top:28px;font-size:13px;color:#9ba6b7}
@media (max-width:760px){.foot{grid-template-columns:1fr}}