*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --gold: #c9a876;
    --gold-light: #e2cfb0;
    --gold-dark: #a8864f;
    --bg: #faf8f5;
    --white: #ffffff;
    --dark: #1a1714;
    --mid: #4a4440;
    --muted: #8a7e76;
    --serif: 'Cormorant Garamond', Georgia, serif;
    --sans: 'DM Sans', Helvetica, sans-serif;
  }

  html { scroll-behavior: smooth; }

  body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--dark);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
  }

  /* ── HEADER ── */
  header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 60px;
    height: 72px;
    background: rgba(250,248,245,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(201,168,118,0.18);
    transition: box-shadow .3s;
  }
  header.scrolled { box-shadow: 0 2px 32px rgba(26,23,20,0.07); }

  .logo {
    font-family: var(--serif);
    font-size: 22px;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: var(--dark);
    text-decoration: none;
  }
  .logo span { color: var(--gold); }

  nav { display: flex; gap: 4px; align-items: center; }
  nav a {
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--mid);
    text-decoration: none;
    transition: color .2s, background .2s;
    position: relative;
    padding: 8px 16px;
    border-radius: 2px;
  }
  nav a::after { display: none; }
  nav a:hover {
    color: var(--dark);
    background: rgba(201,168,118,0.1);
  }

  .nav-cta {
    background: var(--gold); color: var(--white) !important;
    padding: 10px 24px; border-radius: 2px;
    letter-spacing: 0.1em; margin-left: 12px;
    transition: background .2s !important;
    box-shadow: 0 2px 12px rgba(201,168,118,0.3);
  }
  .nav-cta:hover { background: var(--gold-dark) !important; box-shadow: 0 4px 20px rgba(168,134,79,0.35) !important; }

  /* ── HERO — "Editorial Column" (Direction A) ── */
  #hero { padding: 72px 0 0; }
  .hero-split {
    display: grid;
    grid-template-columns: minmax(0,47fr) minmax(0,53fr);
    min-height: calc(100svh - 172px);
  }

  .hero-left {
    display: flex; flex-direction: column; justify-content: center;
    padding: 72px 84px 72px 96px;
    position: relative;
  }
  .hero-rail {
    position: absolute; left: 34px; top: 50%;
    transform: translateY(-50%) rotate(180deg);
    writing-mode: vertical-rl;
    font-size: 10px; letter-spacing: 0.34em; text-transform: uppercase;
    color: var(--muted);
  }

  .hero-eyebrow {
    font-size: 10px; letter-spacing: 0.3em; text-transform: uppercase;
    color: var(--gold-dark); margin-bottom: 34px;
  }

  .hero-headline {
    font-family: var(--serif);
    font-size: clamp(56px, 5.7vw, 82px);
    font-weight: 300; line-height: 0.98; letter-spacing: -0.02em;
    color: var(--dark); text-wrap: balance;
  }
  .hero-headline em { font-style: italic; font-weight: 300; color: var(--gold-dark); }

  .hero-sub {
    font-family: var(--serif); font-style: italic;
    font-size: clamp(20px, 1.7vw, 23px); font-weight: 300;
    color: var(--mid); margin-top: 22px;
  }

  .hero-rule { width: 64px; height: 1px; background: var(--gold); margin: 36px 0 26px; }

  .hero-body { max-width: 37ch; }
  .hero-body p {
    font-family: var(--serif); font-size: 17px; line-height: 1.68;
    color: var(--mid); margin-bottom: 11px; text-wrap: pretty;
  }
  .hero-body p:last-child { margin-bottom: 0; }

  .hero-note {
    margin-top: 22px; font-size: 11.5px; line-height: 1.75;
    letter-spacing: 0.02em; color: var(--muted); max-width: 36ch;
  }

  .hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 44px; }
  .btn-primary {
    font-family: var(--sans);
    font-size: 11.5px; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--dark); text-decoration: none;
    border-bottom: 1px solid var(--gold);
    padding-bottom: 9px;
    display: inline-flex; align-items: center;
    transition: color .2s, border-color .2s;
  }
  .btn-primary:hover { color: var(--gold-dark); border-color: var(--gold-dark); }
  .btn-ghost {
    font-family: var(--sans);
    font-size: 11.5px; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--muted); text-decoration: none;
    display: flex; align-items: center; gap: 9px;
    padding-bottom: 9px; border-bottom: 1px solid transparent;
    transition: color .2s, border-color .2s;
  }
  .btn-ghost:hover { color: var(--gold-dark); border-color: var(--gold); }
  .btn-ghost svg { transition: transform .2s; }
  .btn-ghost:hover svg { transform: translateX(4px); }

  .hero-right { position: relative; overflow: hidden; background: #e8ddd0; }
  .hero-right::after {
    content: ''; position: absolute; inset: auto 0 0 0; height: 40%;
    background: linear-gradient(to top, rgba(26,23,20,0.42), transparent);
    pointer-events: none; z-index: 1;
  }
  .hero-caption {
    position: absolute; left: 32px; bottom: 28px; z-index: 3;
    display: flex; align-items: baseline; gap: 14px; color: #fff;
  }
  .hero-caption b { font-family: var(--serif); font-weight: 400; font-size: 17px; letter-spacing: 0.02em; }
  .hero-caption span { font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase; color: rgba(255,255,255,0.88); }

  .hero-right .slider-dots { left: auto; right: 30px; bottom: 32px; transform: none; z-index: 3; }

  .hero-strip {
    display: grid; grid-template-columns: repeat(3, minmax(0,1fr)) auto;
    align-items: center;
    border-top: 1px solid rgba(201,168,118,0.28);
    min-height: 100px; padding: 0 96px;
  }
  .stat-item { display: flex; align-items: baseline; gap: 12px; }
  .stat-num { font-family: var(--serif); font-weight: 400; font-size: 34px; line-height: 1; color: var(--dark); }
  .stat-label { font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); }
  .hero-est { font-size: 10px; letter-spacing: 0.24em; text-transform: uppercase; color: var(--gold-dark); }

  /* Hero — tablet */
  @media (max-width: 1024px) {
    .hero-left { padding: 64px 48px 64px 64px; }
    .hero-rail { display: none; }
    .hero-headline { font-size: clamp(46px, 6.4vw, 62px); }
    .hero-body p { font-size: 16px; }
    .hero-strip { padding: 0 48px; grid-template-columns: repeat(3, minmax(0,1fr)); row-gap: 18px; padding-top: 24px; padding-bottom: 24px; }
    .hero-est { grid-column: 1 / -1; }
  }

  /* Hero — mobile: stacked, ảnh dẫn trước */
  @media (max-width: 768px) {
    #hero { padding-top: 64px; }
    .hero-split { grid-template-columns: 1fr; min-height: 0; }
    .hero-right {
      order: -1;
      aspect-ratio: 4 / 5;
      max-height: 56svh;
      width: 100%;
    }
    .hero-right .slide img { object-position: center 26%; }
    .hero-caption { left: 20px; bottom: 22px; gap: 10px; }
    .hero-caption b { font-size: 15px; }
    .hero-caption span { font-size: 9px; letter-spacing: 0.18em; }
    .slider-dots { bottom: 20px; left: auto; right: 20px; transform: none; }
    .sdot { width: 8px; height: 8px; padding: 0; }

    .hero-left { padding: 34px 22px 40px; }
    .hero-eyebrow { font-size: 9.5px; letter-spacing: 0.26em; margin-bottom: 20px; }
    .hero-headline { font-size: clamp(40px, 12vw, 52px); line-height: 1.02; }
    .hero-sub { font-size: 19px; margin-top: 16px; }
    .hero-rule { margin: 26px 0 20px; }
    .hero-body { max-width: none; }
    .hero-body p { font-size: 16.5px; line-height: 1.65; margin-bottom: 12px; }
    .hero-note { font-size: 12px; max-width: none; margin-top: 20px; }

    .hero-actions { flex-direction: column; align-items: stretch; gap: 12px; margin-top: 32px; }
    .btn-primary {
      justify-content: center; min-height: 54px;
      background: var(--dark); color: var(--white);
      border-bottom: none; padding: 0 24px;
      font-size: 12px; letter-spacing: 0.2em;
    }
    .btn-primary:hover { color: var(--white); }
    .btn-ghost {
      justify-content: center; min-height: 48px;
      border: 1px solid rgba(201,168,118,0.55); color: var(--mid);
      padding: 0 24px; font-size: 12px; letter-spacing: 0.2em;
    }

    .hero-strip {
      grid-template-columns: repeat(3, minmax(0,1fr));
      row-gap: 20px; padding: 24px 22px 28px; min-height: 0;
      text-align: center;
    }
    .stat-item { flex-direction: column; align-items: center; gap: 6px; }
    .stat-num { font-size: 27px; }
    .stat-label { font-size: 9px; letter-spacing: 0.14em; }
    .hero-est { grid-column: 1 / -1; text-align: center; font-size: 9.5px; letter-spacing: 0.2em; padding-top: 18px; border-top: 1px solid rgba(201,168,118,0.22); }
  }

  /* Hero — màn hình rất nhỏ (iPhone SE) */
  @media (max-width: 380px) {
    .hero-left { padding: 30px 18px 36px; }
    .hero-headline { font-size: 38px; }
    .hero-sub { font-size: 18px; }
    .hero-body p { font-size: 16px; }
    .hero-strip { padding: 22px 16px 26px; }
    .stat-num { font-size: 24px; }
    .stat-label { font-size: 8.5px; }
  }

  @media (prefers-reduced-motion: reduce) {
    .slide { transition: none; }
  }

  /* ── SECTION COMMON ── */
  section { padding: 120px 60px; }
  .section-label {
    font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
    color: var(--gold); display: flex; align-items: center; gap: 12px;
    margin-bottom: 20px;
  }
  .section-label::before { content: ''; display: block; width: 32px; height: 1px; background: var(--gold); }
  .section-title {
    font-family: var(--serif);
    font-size: clamp(36px, 4vw, 56px);
    font-weight: 400; line-height: 1.15;
    color: var(--dark);
  }
  .section-sub {
    font-family: var(--serif); font-style: italic; font-size: 20px;
    color: var(--gold-dark); margin-top: 8px;
  }

  
/* ── HERO SLIDER ── */
  .hero-slider {
    position: relative; width: 100%; height: 100%; overflow: hidden;
  }
  .slide {
    position: absolute; inset: 0;
    opacity: 0; transition: opacity 1s ease;
  }
  .slide.active { opacity: 1; }
  .slide img {
    width: 100%; height: 100%;
    object-fit: cover; object-position: center;
    display: block;
  }
  .slider-dots {
    position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 8px; z-index: 5;
  }
  .sdot {
    width: 7px; height: 7px; border-radius: 50%;
    background: rgba(255,255,255,0.45); cursor: pointer;
    transition: background .3s, transform .3s;
    border: none;
  }
  .sdot.active { background: var(--white); transform: scale(1.3); }

  
/* ── MOBILE BURGER (very basic) ── */
  .burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
  .burger span { display: block; width: 24px; height: 1.5px; background: var(--dark); }

  @media (max-width: 960px) {
    header { padding: 0 24px; }
    nav .nav-links { display: none; }
    nav .nav-links.open { display: flex; flex-direction: column; position: fixed; top: 72px; left: 0; right: 0; background: var(--bg); padding: 24px; gap: 24px; border-bottom: 1px solid rgba(201,168,118,0.2); }
    .burger { display: flex; }
    section { padding: 80px 24px; }
    .portfolio-grid { grid-template-columns: 1fr 1fr; grid-template-rows: auto; gap: 12px; }
    .portfolio-grid .item:first-child { grid-row: span 1; height: 240px; }
    .services-grid { grid-template-columns: 1fr 1fr; gap: 2px; }
    .footer-top { grid-template-columns: 1fr 1fr; }
    .contact-details { flex-direction: column; gap: 24px; }
    .contact-form { grid-template-columns: 1fr; }
    .contact-form .full { grid-column: span 1; }
    .form-submit { grid-column: span 1; }
    .portfolio-header { flex-direction: column; align-items: flex-start; gap: 16px; }
  }