:root {
  color-scheme: dark;
  --paper: #f6f1ea;
  --ink: #161422;
  --muted: #b5acbb;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--ink); color: var(--paper); font: 16px/1.5 "Be Vietnam Pro", system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid #a4ecff; outline-offset: -5px; }
.mast, footer { display: flex; justify-content: space-between; align-items: center; padding: 18px clamp(20px,4vw,80px); gap: 20px; }
.mast { background: #14121d; border-bottom: 1px solid #ffffff21; }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand img { width: 41px; height: 41px; object-fit: contain; }
.brand b { display: block; font-size: 22px; line-height: 1.15; letter-spacing: -.055em; }
.brand small, footer { font-size: 10px; letter-spacing: .12em; }
nav { display: flex; gap: clamp(18px,3vw,48px); font-weight: 550; font-size: 14px; }
nav a:hover { color: #ccaeff; }
nav a { white-space: nowrap; }
main { display: grid; grid-template-columns: 1fr 1fr; }
.portal { position: relative; isolation: isolate; overflow: hidden; min-height: clamp(360px,38vw,540px); display: flex; align-items: flex-end; padding: clamp(30px,4.2vw,88px); }
.studio { background: #27203f; }
.design { background: #494738; }
.portal img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -3; transition: transform 900ms ease; }
.studio img { object-position: 53% 43%; }
.design img { object-position: 49% 52%; }
.portal::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg,rgba(14,9,29,.98),rgba(18,10,37,.80) 19%,rgba(25,15,48,.22) 56%,transparent 80%); }
.design::before { background: linear-gradient(0deg,rgba(22,24,19,.98),rgba(26,29,23,.79) 20%,rgba(23,25,21,.16) 58%,transparent 80%); }
.portal:hover img { transform: scale(1.035); }
.copy { width: 100%; max-width: 620px; }
.category { margin: 0 0 10px; font-size: 11px; font-weight: 650; letter-spacing: .17em; text-transform: uppercase; }
.studio .category { color: #e3c5ff; }
.design .category { color: #f7e5bd; }
h2 { margin: 0; font: 750 clamp(62px,7.5vw,146px)/1 "Archivo",system-ui,sans-serif; letter-spacing: -.065em; }
.design h2 { font: italic 400 clamp(68px,8.3vw,160px)/.93 "Baskervville",Georgia,serif; letter-spacing: -.06em; }
.description { font-size: clamp(15px,1.15vw,20px); margin: 18px 0 27px; max-width: 36ch; color: #faf6f1; }
.action { display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; border: 1px solid #ffffff99; border-radius: 32px; padding: 11px 19px; font-size: 14px; font-weight: 600; }
.portal:hover .action,.portal:focus-visible .action { color: #191321; background: var(--paper); }
footer { min-height: 55px; color: #cac3d1; letter-spacing: .045em; font-size: 12px; }
footer em { font-family: Georgia,serif; font-size: 15px; }
.contact { display: flex; gap: 18px; }
.contact a { border-bottom: 1px solid #ffffff40; padding-bottom: 1px; }
.contact a:hover { color: #fff; border-color: #fff; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
@media (max-width: 700px) {
  main { grid-template-columns: 1fr; }
  .mast { padding: 12px 18px; gap: 8px; }
  .brand { gap: 8px; } .brand img { width: 32px; height: 32px; }
  .brand b { font-size: 18px; } .brand small { font-size: 7px; }
  nav { font-size: 12px; gap: 12px; }
  .portal { min-height: clamp(360px,58svh,560px); padding: 25px 23px; }
  .description { margin: 10px 0 17px; }
  footer { flex-wrap: wrap; gap: 5px 15px; padding: 15px 20px; }
}
@media (prefers-reduced-motion: reduce) { .portal img { transition: none; } .portal:hover img { transform: none; } }


/* B@o Build: bàn thiết kế mở đầu trang */
.hero { position: relative; isolation: isolate; display: flex; align-items: center; overflow: hidden; min-height: clamp(520px, 50vw, 860px); background: #12100E; color: #F3ECDF; }
.hero picture, .hero img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero img { object-fit: cover; object-position: 70% 50%; z-index: -2; transition: transform 1.2s ease; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(14,10,7,.86) 0%, rgba(14,10,7,.55) 34%, rgba(14,10,7,0) 60%); }
.hero:hover img { transform: scale(1.025); }
.hcopy { padding: 0 clamp(24px,5.5vw,104px); max-width: 640px; }
.blogo { display: block; width: clamp(260px, 30vw, 470px); height: auto; }
.hsub { margin: clamp(16px,1.8vw,26px) 0 clamp(22px,2.4vw,34px); font: 400 clamp(20px,1.9vw,30px)/1.4 "Playfair Display", Georgia, serif; color: #F3ECDF; }
.hgo { display: inline-flex; align-items: center; gap: 14px; padding: 15px 30px; border-radius: 10px; background: #DDB878; color: #12100E; font: 600 clamp(15px,1.15vw,18px)/1 "Be Vietnam Pro", system-ui, sans-serif; box-shadow: 0 18px 40px -18px rgba(221,184,120,.7); transition: background .3s ease, transform .3s ease; }
.hero:hover .hgo, .hero:focus-visible .hgo { background: #F3ECDF; transform: translateY(-2px); }
@media (max-width: 700px) {
  .hero { align-items: flex-start; min-height: 620px; }
  .hero img { object-position: 50% 100%; }
  .hero picture { top: auto; height: 62%; }
  .hero::before { background: linear-gradient(180deg, #12100E 38%, rgba(18,16,14,.0) 58%); }
  .hcopy { padding: 34px 24px 0; }
  .blogo { width: 250px; }
  .hsub { font-size: 19px; margin: 14px 0 20px; }
  .hgo { padding: 13px 22px; font-size: 15px; }
  .portal { min-height: 300px; }
}
@media (prefers-reduced-motion: reduce) { .hero img, .hgo { transition: none; } .hero:hover img { transform: none; } }