@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,500;0,600;0,700;1,500&family=Be+Vietnam+Pro:wght@400;500;600;700&display=swap');

:root{
  /* Brand: Son cua Thanh Nam — navy + orange, taken from the logo artwork */
  --cream:#f2f6fc;
  --cream-2:#e4ecf8;
  --paper:#ffffff;
  --ink:#0a265c;        /* navy  – body copy        (13.5:1 on --cream) */
  --ink-2:#4d5c78;      /* muted – secondary copy   ( 6.3:1 on --cream) */
  --line:#d3deee;
  --brand:#fd5703;      /* logo orange – large display type + accents */
  --brand-ink:#c2410c;  /* accessible orange – small text + buttons   */
  --brand-deep:#9a3308; /* hover / pressed state */
  --navy:#0a265c;
  --navy-900:#061a3d;   /* footers + dark bands */
  /* legacy aliases so existing rules resolve to the new palette */
  --wood:var(--brand-ink);
  --wood-dark:var(--brand-deep);
  --iron:var(--navy-900);
  --serif:'Lora', Georgia, serif;
  --sans:'Be Vietnam Pro', system-ui, sans-serif;
  --max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--cream);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.15;margin:0;text-wrap:balance;letter-spacing:-.01em}
p{margin:0;text-wrap:pretty}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(242,246,252,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.brand{display:flex;flex-direction:column;align-items:flex-start;gap:5px;text-decoration:none}
.brand-logo{height:40px;width:auto;display:block}
.brand-sub{font-size:11px;color:var(--ink-2);letter-spacing:.1em;text-transform:uppercase;white-space:nowrap}
.nav{display:flex;gap:4px}
.nav a{text-decoration:none;padding:10px 14px;border-radius:999px;font-weight:500;font-size:15px;color:var(--ink-2)}
.nav a:hover{color:var(--ink);background:var(--cream-2)}
.nav a.active{color:var(--ink);background:var(--cream-2)}
.hdr-call{display:flex;align-items:center;gap:10px;text-decoration:none;background:var(--iron);color:var(--paper);padding:11px 18px;border-radius:999px;font-weight:600;font-size:15px;white-space:nowrap}
.hdr-call:hover{background:var(--wood-dark)}
.hdr-call svg{width:18px;height:18px}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:44px;height:44px;font-size:20px;cursor:pointer;color:var(--ink)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 24px;border-radius:999px;font-weight:600;font-size:16px;text-decoration:none;border:1.5px solid transparent;cursor:pointer;font-family:var(--sans);transition:background .2s,color .2s}
.btn-primary{background:var(--brand-ink);color:#fff}
.btn-primary:hover{background:var(--brand-deep)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn-light{background:var(--paper);color:var(--ink)}
.btn-light:hover{background:var(--cream-2)}

/* type helpers */
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-ink)}
.lead{font-size:19px;color:var(--ink-2);max-width:56ch}
section{padding:96px 0}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:32px;margin-bottom:48px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(32px,4vw,46px);max-width:18ch;margin-top:12px}
.sec-head p{max-width:44ch;color:var(--ink-2)}

/* page hero */
.page-hero{padding:80px 0 56px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(40px,5.5vw,64px);margin:14px 0 18px;max-width:16ch}

/* media box (replaces <image-slot>) */
.media{display:block;width:100%;height:auto;background:var(--cream-2);overflow:hidden}
.media img{width:100%;height:100%;object-fit:cover}

/* footer */
.ftr{background:var(--navy-900);color:#d3ddf0;padding:64px 0 32px;margin-top:0}
.ftr-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px}
.ftr h4{font-family:var(--serif);color:#fff;font-size:18px;margin:0 0 16px;font-weight:600}
.ftr a{text-decoration:none;color:#d3ddf0}
.ftr a:hover{color:#fff}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ftr .brand-logo{height:46px}
.ftr .brand-sub{color:#9fb0cc}
.ftr-phone{font-family:var(--serif);font-size:30px;color:#fff;margin-top:20px;display:block}
.ftr-bottom{border-top:1px solid #1c355f;margin-top:48px;padding-top:24px;font-size:14px;color:#9fb0cc}

/* floating contact */
.fab{position:fixed;right:20px;bottom:20px;z-index:60;display:flex;flex-direction:column;gap:12px}
.fab a{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;text-decoration:none;color:#fff;font-weight:700;font-size:13px;box-shadow:0 8px 24px rgba(42,33,27,.25)}
.fab .fab-zalo{background:#0068ff}
.fab .fab-call{background:var(--brand);animation:ring 2.4s infinite}
.fab svg{width:24px;height:24px}
@keyframes ring{0%,100%{box-shadow:0 0 0 0 rgba(253,87,3,.5),0 8px 24px rgba(6,26,61,.25)}50%{box-shadow:0 0 0 12px rgba(253,87,3,0),0 8px 24px rgba(6,26,61,.25)}}

/* CTA band */
.cta-band{background:var(--navy);color:#fff;padding:80px 0}
.cta-band .wrap{display:flex;justify-content:space-between;align-items:center;gap:40px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(30px,4vw,44px);max-width:20ch}
.cta-band p{color:#cfe0f7;margin-top:12px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-light{background:var(--brand);color:#fff}
.cta-band .btn-light:hover{background:var(--brand-ink)}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.75);color:#fff}
.cta-band .btn-ghost:hover{background:#fff;color:var(--ink)}

/* forms */
.form{display:grid;gap:16px}
.form label{display:grid;gap:6px;font-size:14px;font-weight:600;color:var(--ink-2)}
.form input,.form select,.form textarea{font:inherit;font-size:16px;padding:14px 16px;border:1.5px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink)}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--wood)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-note{font-size:14px;color:var(--ink-2)}
.form-ok{display:none;background:var(--cream-2);border-radius:12px;padding:16px 18px;font-size:15px}
.form-ok.show{display:block}
.form-ok a{color:var(--wood);font-weight:600}
.form-err{display:none;background:#f6e4dc;border:1px solid #d9a48c;color:#8a3d1d;border-radius:12px;padding:14px 16px;font-size:15px}
.form-err.show{display:block}

/* ============ trust bar ============ */
.trust{background:var(--navy-900);color:#d3ddf0;padding:26px 0}
.trust .wrap{display:flex;gap:28px;flex-wrap:wrap;justify-content:space-between;align-items:center}
.trust-item{display:flex;align-items:center;gap:12px;font-size:15px}
.trust-item svg{color:var(--brand);flex:none}
.trust-item b{color:#fff;font-weight:600}
.trust-item .wrap-txt{display:flex;flex-direction:column;line-height:1.35}
.trust-item small{color:#9fb0cc;font-size:13px}
@media (max-width:960px){.trust .wrap{gap:18px}.trust-item{font-size:14px}}

/* ============ dark feature band ============ */
.band-dark{background:var(--navy-900);color:#fff}
.band-dark .eyebrow{color:#ff9052}
.band-dark .lead,.band-dark p{color:#c4d3e8}
.band-dark a.dark-link{color:#fff;text-decoration:underline;text-underline-offset:3px}

/* ============ before / after ============ */
.ba-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.ba-compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ba-cell{position:relative}
.ba-cell .media{aspect-ratio:3/4;border-radius:18px}
.ba-tag{position:absolute;top:12px;left:12px;background:rgba(6,26,61,.82);color:#fff;font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:6px 12px;border-radius:999px}
.ba-cell.after .ba-tag{background:var(--wood)}
.ba-note{display:flex;align-items:center;gap:7px;margin-top:14px;font-size:12.5px;line-height:1.5;color:var(--ink-2);opacity:.9}
.ba-note svg{flex:none;opacity:.8}
.ba-points{display:grid;gap:16px;margin-top:28px}
.ba-point{display:grid;grid-template-columns:26px 1fr;gap:12px;align-items:start}
.ba-point svg{color:var(--wood);margin-top:2px}
.ba-point p{font-size:16px;color:var(--ink-2)}

/* ============ testimonials ============ */
.tst-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tst{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:30px;display:flex;flex-direction:column;gap:16px}
.tst .stars{display:flex;gap:3px;color:#e8a33d}
.tst blockquote{margin:0;font-size:16px;line-height:1.65;color:var(--ink)}
.tst .who{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:8px;border-top:1px solid var(--line)}
.tst .av{width:42px;height:42px;border-radius:50%;background:var(--cream-2);color:var(--wood);display:grid;place-items:center;font-family:var(--serif);font-weight:700;flex:none}
.tst .who b{display:block;font-size:15px}
.tst .who small{color:var(--ink-2);font-size:13px}

/* ============ FAQ accordion ============ */
.faq{display:grid;gap:0;border-top:1px solid var(--line);max-width:900px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:24px 0;font-family:var(--serif);font-size:20px;font-weight:600}
.faq summary::-webkit-details-marker{display:none}
.faq summary .ic{flex:none;color:var(--wood);transition:transform .25s}
.faq details[open] summary .ic{transform:rotate(45deg)}
.faq .ans{padding:0 0 26px;color:var(--ink-2);font-size:16px;max-width:72ch}

/* ============ area chips / area cards ============ */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chips a{text-decoration:none;font-size:15px;font-weight:500;padding:9px 16px;border-radius:999px;border:1px solid var(--line);background:var(--paper);color:var(--ink-2);transition:border-color .2s,color .2s}
.chips a:hover{border-color:var(--wood);color:var(--ink)}
.area-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.area-card{display:flex;flex-direction:column;gap:8px;background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:24px;text-decoration:none;transition:border-color .2s,transform .2s}
.area-card:hover{border-color:var(--wood);transform:translateY(-2px)}
.area-card .top{display:flex;align-items:center;gap:10px}
.area-card .top svg{color:var(--wood);flex:none}
.area-card b{font-family:var(--serif);font-size:21px;font-weight:600}
.area-card p{font-size:15px;color:var(--ink-2)}

/* ============ project cards ============ */
.pj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pj{display:flex;flex-direction:column;gap:14px;text-decoration:none}
.pj .media{aspect-ratio:4/3;border-radius:16px}
.pj b{font-family:var(--serif);font-size:19px;font-weight:600;display:block}
.pj .meta{display:flex;justify-content:space-between;gap:12px;align-items:baseline}
.pj .meta span{color:var(--wood);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap}
.pj small{color:var(--ink-2);font-size:14px}
.pj .cta{font-size:15px;font-weight:600;color:var(--wood);display:inline-flex;align-items:center;gap:6px}
.pj:hover .media{outline:2px solid var(--wood);outline-offset:-2px}

/* ============ service detail list ============ */
.svc-hero-media .media{aspect-ratio:16/9;border-radius:20px;margin-top:40px}
.spec-list{list-style:none;margin:24px 0 0;padding:0;display:grid;gap:12px}
.spec-list li{display:grid;grid-template-columns:24px 1fr;gap:12px;align-items:start;font-size:16px;color:var(--ink-2)}
.spec-list li svg{color:var(--wood);margin-top:3px}

/* breadcrumb */
.crumbs{font-size:14px;color:var(--ink-2);margin-bottom:6px}
.crumbs a{text-decoration:none;color:var(--ink-2)}
.crumbs a:hover{color:var(--wood)}
.crumbs span{color:var(--line)}

@media (max-width:960px){
  .ba-grid{grid-template-columns:1fr;gap:36px}
  .tst-grid{grid-template-columns:1fr}
  .area-grid,.pj-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  .area-grid,.pj-grid{grid-template-columns:1fr}
}

@media (max-width:960px){
  .nav{display:none;position:absolute;top:76px;left:0;right:0;background:var(--cream);flex-direction:column;padding:12px 20px 20px;border-bottom:1px solid var(--line)}
  .nav.open{display:flex}
  .nav a{padding:14px 12px;font-size:17px}
  .menu-btn{display:block}
  .hdr-call .hdr-call-txt{display:none}
  .ftr-grid{grid-template-columns:1fr}
  section{padding:64px 0}
}
@media (max-width:600px){
  .wrap{padding:0 20px}
  .form .row{grid-template-columns:1fr}
  .brand-sub{display:none}
}

/* ============ photo library (real job photos) ============ */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.pgrid.cols-2{grid-template-columns:repeat(2,1fr)}
.pphoto{display:flex;flex-direction:column;gap:10px}
.pphoto .media{aspect-ratio:3/4;border-radius:16px;background:var(--cream-2)}
.pphoto figcaption{font-size:13.5px;line-height:1.55;color:var(--ink-2)}
.pnote{font-size:12.5px;line-height:1.6;color:var(--ink-2);opacity:.85;margin-top:14px;display:flex;align-items:flex-start;gap:7px}
.pnote svg{flex:none;margin-top:2px;opacity:.8}
@media (max-width:960px){.pgrid{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.pgrid,.pgrid.cols-2{grid-template-columns:1fr}}

/* ============ filterable photo library page ============ */
.lib-filters{display:flex;flex-direction:column;gap:14px;margin:40px 0 30px}
.lib-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.lib-row .lbl{font-family:var(--serif);font-style:italic;color:var(--wood);font-size:14px;min-width:88px}
.lib-row button{font:inherit;font-size:14.5px;font-weight:500;padding:9px 16px;border-radius:999px;border:1.5px solid var(--line);background:transparent;color:var(--ink-2);cursor:pointer;transition:background .18s,border-color .18s,color .18s}
.lib-row button:hover{border-color:var(--wood)}
.lib-row button.on{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.lib-count{font-size:14px;color:var(--ink-2);margin-bottom:20px}
.lib-count b{color:var(--ink)}
.lib-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.lib-item{margin:0;background:transparent;border:0;padding:0;cursor:zoom-in;position:relative;border-radius:14px;overflow:hidden;display:block;font:inherit;text-align:left;color:inherit}
.lib-item img{display:block;width:100%;height:100%;object-fit:cover;aspect-ratio:3/4;border-radius:14px;background:var(--cream-2);transition:transform .35s}
.lib-item:hover img{transform:scale(1.04)}
.lib-item .cap{position:absolute;left:0;right:0;bottom:0;padding:26px 12px 10px;font-size:12.5px;line-height:1.45;color:#fff;background:linear-gradient(transparent,rgba(6,26,61,.86));opacity:0;transition:opacity .25s}
.lib-item:hover .cap,.lib-item:focus-visible .cap{opacity:1}
.lib-item.hide{display:none}
@media (max-width:1080px){.lib-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:760px){.lib-grid{grid-template-columns:1fr 1fr}}

/* lightbox */
.lb{position:fixed;inset:0;z-index:200;background:rgba(6,26,61,.94);display:flex;align-items:center;justify-content:center;padding:24px;opacity:0;visibility:hidden;transition:opacity .22s,visibility .22s}
.lb.open{opacity:1;visibility:visible}
.lb figure{margin:0;max-width:min(94vw,900px);max-height:90vh;display:flex;flex-direction:column;gap:14px}
.lb img{max-width:100%;max-height:76vh;width:auto;height:auto;object-fit:contain;border-radius:14px;background:#0a1a33}
.lb figcaption{color:#e7ecf6;font-size:14.5px;line-height:1.55;text-align:center}
.lb figcaption span{display:block;font-size:12.5px;opacity:.65;margin-top:4px}
.lb-close{position:absolute;top:20px;right:22px;width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.08);color:#fff;font-size:22px;line-height:1;cursor:pointer;display:grid;place-items:center}
.lb-close:hover{background:rgba(255,255,255,.18)}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.08);color:#fff;font-size:22px;line-height:1;cursor:pointer;display:grid;place-items:center}
.lb-nav:hover{background:rgba(255,255,255,.18)}
.lb-nav.prev{left:16px}
.lb-nav.next{right:16px}
@media (max-width:600px){.lb-nav{width:40px;height:40px;font-size:18px}.lb-nav.prev{left:8px}.lb-nav.next{right:8px}}