/* ============================================================
   LIVING SPACE CORP — Global stylesheet
   Modern-minimal, sky-blue brand
   ============================================================ */

:root {
  --blue-900: #0b3d6b;
  --blue-700: #115a9e;
  --blue-500: #1f8fd6;
  --blue-300: #7cc4ee;
  --blue-50:  #eef7fc;
  --ink:      #14202b;
  --muted:    #5d6b78;
  --line:     #e3e9ef;
  --bg:       #ffffff;
  --bg-soft:  #f6f9fc;
  --card:     #ffffff;
  --header-bg:rgba(255,255,255,.88);
  --accent:   #e23b3b;        /* logo red, used sparingly */
  --rainbow:  linear-gradient(90deg,#e23b3b,#f5a623,#3bb273,#1f8fd6,#7a4fd0);
  --shadow:   0 14px 40px rgba(11,61,107,.10);
  --shadow-sm:0 6px 18px rgba(11,61,107,.08);
  --radius:   16px;
  --maxw:     1180px;
  --ease:     cubic-bezier(.22,.61,.36,1);
}

html[data-theme="dark"] {
  --blue-50:  #15293a;
  --ink:      #e7eef5;
  --muted:    #9db0bf;
  --line:     #223445;
  --bg:       #0d1722;
  --bg-soft:  #111e2b;
  --card:     #142433;
  --header-bg:rgba(13,23,34,.85);
  --shadow:   0 14px 40px rgba(0,0,0,.45);
  --shadow-sm:0 6px 18px rgba(0,0,0,.4);
}

* { box-sizing: border-box; }

html { color-scheme: light dark; }
body, .header, .card, .cert, .filter button, .btn--ghost, .menu.open, .tl-card,
.field-group input, .field-group textarea, .hero, .page-hero, .stripe, .cta-banner {
  transition: background-color .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1,h2,h3,h4 { line-height: 1.15; margin: 0 0 .5em; font-weight: 800; letter-spacing: -.02em; }
h1 { font-size: clamp(2.1rem, 4.5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.6rem); }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 1rem; color: var(--muted); }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section__head { max-width: 720px; margin-bottom: 56px; }
.eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--blue-700); margin-bottom: 14px;
}
.eyebrow::before {
  content: ""; display: inline-block; width: 26px; height: 2px;
  background: var(--rainbow); vertical-align: middle; margin-right: 10px;
}
.lead { font-size: 1.15rem; color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  padding: 13px 26px; border-radius: 999px; font-weight: 700; font-size: .95rem;
  cursor: pointer; border: 1.5px solid transparent; transition: all .25s var(--ease);
}
.btn--primary { background: linear-gradient(135deg, var(--blue-500), var(--blue-700)); color: #fff; box-shadow: 0 6px 18px rgba(17,90,158,.28); }
.btn--primary:hover { background: linear-gradient(135deg, var(--blue-700), var(--blue-900)); transform: translateY(-2px); box-shadow: 0 12px 26px rgba(17,90,158,.36); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: var(--card); }
.btn--ghost:hover { border-color: var(--blue-500); color: var(--blue-700); }
.btn--light { background: #fff; color: var(--blue-700); }
.btn--light:hover { transform: translateY(-2px); }

/* ============================================================
   HEADER / NAV
   ============================================================ */
.header {
  position: sticky; top: 0; z-index: 50;
  background: var(--header-bg); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s var(--ease), border-color .3s;
}
.header.scrolled { box-shadow: 0 8px 30px rgba(11,61,107,.10); border-bottom-color: transparent; }
.header.scrolled .nav { height: 64px; }
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%; z-index: 60;
  background: var(--rainbow); transition: width .1s linear;
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 74px; transition: height .3s var(--ease); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  width: 40px; height: 40px; border-radius: 11px; flex: none;
  background: var(--blue-700); position: relative; overflow: hidden;
  display: grid; place-items: center;
}
.brand__mark::after {
  content: ""; position: absolute; inset: 0; background: var(--rainbow); opacity: .9;
  -webkit-mask: var(--wing-mask) center/68% no-repeat; mask: var(--wing-mask) center/68% no-repeat;
}
.brand__txt { display: flex; flex-direction: column; line-height: 1.05; }
.brand__txt b { font-size: 1.02rem; letter-spacing: -.01em; color: var(--ink); }
.brand__txt span { font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.brand__logo { height: 40px; width: auto; display: block; transition: height .3s var(--ease);
  filter: saturate(.82) brightness(.9); }              /* làm dịu coral đỏ cho bớt chói */
.header.scrolled .brand__logo { height: 34px; }
.brand__logo--footer { height: 48px; filter: saturate(.88) brightness(.96); }
@media (max-width: 640px){ .brand__logo { height: 34px; } }

.menu { display: flex; align-items: center; gap: 30px; list-style: none; margin: 0; padding: 0; }
.menu a { font-size: .94rem; font-weight: 600; color: var(--ink); position: relative; padding: 6px 0; }
.menu a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--blue-700); transition: width .25s var(--ease);
}
.menu a:hover::after, .menu a.is-active::after { width: 100%; }
.menu a.is-active { color: var(--blue-700); }

.nav__right { display: flex; align-items: center; gap: 16px; }
.lang {
  display: inline-flex; border: 1.5px solid var(--line); border-radius: 999px; overflow: hidden;
  font-size: .8rem; font-weight: 700;
}
.lang button { border: 0; background: transparent; padding: 6px 12px; cursor: pointer; color: var(--muted); }
.lang button.is-active { background: var(--blue-700); color: #fff; }

.nav__cta { }
.theme-toggle {
  width: 38px; height: 38px; border-radius: 50%; border: 1.5px solid var(--line);
  background: var(--card); color: var(--ink); cursor: pointer; display: grid; place-items: center;
  padding: 0; transition: border-color .2s, color .2s;
}
.theme-toggle:hover { border-color: var(--blue-500); color: var(--blue-700); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .moon { display: none; }
html[data-theme="dark"] .theme-toggle .sun { display: none; }
html[data-theme="dark"] .theme-toggle .moon { display: block; }

.burger { display: none; border: 0; background: transparent; cursor: pointer; padding: 8px; }
.burger span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: .25s; }

/* ============================================================
   HERO
   ============================================================ */
.hero { position: relative; padding: 110px 0 100px; overflow: hidden; background: var(--blue-50); }
.hero::before {
  content: ""; position: absolute; right: -8%; top: -20%; width: 60vw; height: 60vw; max-width: 760px; max-height: 760px;
  background: radial-gradient(circle at 30% 30%, rgba(31,143,214,.22), transparent 60%);
  border-radius: 50%; z-index: 0;
}
.hero .container { position: relative; z-index: 1; }
.hero__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero h1 span { background: var(--rainbow); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.hero__stats { display: flex; gap: 34px; margin-top: 44px; flex-wrap: wrap; }
.hero__stats .num { font-size: 2.1rem; font-weight: 800; color: var(--blue-900); }
.hero__stats .lbl { font-size: .85rem; color: var(--muted); }
.hero__visual {
  border-radius: 22px; aspect-ratio: 4/5; box-shadow: var(--shadow);
  background: linear-gradient(150deg, var(--blue-700), var(--blue-900));
  position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.15);
}
.hero__visual::before {                 /* blueprint grid */
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.10) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask: radial-gradient(circle at 50% 40%, #000 60%, transparent 100%);
  mask: radial-gradient(circle at 50% 40%, #000 60%, transparent 100%);
}
.hero__visual::after {                  /* building elevation */
  content: ""; position: absolute; inset: 0;
  background: url("../assets/img/blueprint.svg") center 46% / 74% auto no-repeat;
  opacity: .9;
}
.hero__visual .wing {                   /* small brand mark, corner */
  position: absolute; top: 18px; right: 18px; width: 56px; height: 56px;
  background: var(--rainbow); opacity: .9;
  -webkit-mask: var(--wing-mask) center/contain no-repeat; mask: var(--wing-mask) center/contain no-repeat;
}
.hero__photo {
  position: relative; border-radius: 22px; overflow: hidden; box-shadow: var(--shadow);
  aspect-ratio: 4/5; border: 1px solid rgba(255,255,255,.5);
}
.hero__photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero__badge {
  position: absolute; left: 18px; bottom: 18px; z-index: 2;
  background: rgba(255,255,255,.95); color: var(--blue-900);
  border-radius: 14px; padding: 12px 16px; box-shadow: var(--shadow-sm);
  display: flex; align-items: center; gap: 12px;
}
.hero__badge .b-num { font-size: 1.6rem; font-weight: 800; line-height: 1; }
.hero__badge .b-num span { background: var(--rainbow); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__badge .b-lbl { font-size: .74rem; color: var(--muted); font-weight: 600; max-width: 96px; line-height: 1.25; }

/* ============================================================
   STAT STRIP
   ============================================================ */
.stripe { background: var(--blue-900); color: #fff; }
.stripe__grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; padding: 48px 0; }
.stripe .num { font-size: 2.4rem; font-weight: 800; }
.stripe .num span { background: var(--rainbow); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stripe .lbl { color: var(--blue-300); font-size: .9rem; }

/* ============================================================
   CARDS / SERVICES
   ============================================================ */
.grid { display: grid; gap: 24px; }
.grid--4 { grid-template-columns: repeat(4,1fr); }
.grid--3 { grid-template-columns: repeat(3,1fr); }
.grid--2 { grid-template-columns: repeat(2,1fr); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card__ico {
  width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--blue-50), rgba(31,143,214,.18));
  color: var(--blue-700); margin-bottom: 18px; transition: transform .3s var(--ease);
}
.card:hover .card__ico { transform: translateY(-3px) rotate(-4deg); }
.card__ico svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 8px; }
.card p { margin: 0; font-size: .95rem; }
.card__num { font-size: .8rem; font-weight: 700; color: var(--blue-300); }

/* ============================================================
   PROJECTS
   ============================================================ */
.filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.filter button {
  border: 1.5px solid var(--line); background: var(--card); color: var(--muted);
  padding: 8px 18px; border-radius: 999px; font-weight: 600; font-size: .88rem; cursor: pointer; transition: .2s;
}
.filter button.is-active, .filter button:hover { background: var(--blue-700); color: #fff; border-color: var(--blue-700); }

.proj { position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3;
  box-shadow: var(--shadow-sm); transition: transform .35s var(--ease), box-shadow .35s var(--ease); }
.proj:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.proj::after {                       /* hover ring */
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); pointer-events: none;
  box-shadow: inset 0 0 0 0 var(--blue-500); transition: box-shadow .35s var(--ease); z-index: 2;
}
.proj:hover::after { box-shadow: inset 0 0 0 3px var(--blue-500); }
.proj img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.proj:hover img { transform: scale(1.08); }
.proj__ph {
  width: 100%; height: 100%; position: relative; overflow: hidden;
  background:
    radial-gradient(circle at 75% 15%, rgba(255,255,255,.14), transparent 55%),
    linear-gradient(140deg, var(--blue-500), var(--blue-900));
  display: grid; place-items: center; color: rgba(255,255,255,.85);
  font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
}
.proj__ph::before {                 /* blueprint grid */
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.10) 1px, transparent 1px);
  background-size: 26px 26px;
}
.proj__ph::after {                  /* skyline line-art */
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 72%;
  background: url("../assets/img/skyline.svg") center bottom / 92% auto no-repeat;
  opacity: .42;
}
.proj__ph span { position: relative; z-index: 1; display: inline-flex; align-items: center; gap: 7px;
  background: rgba(8,28,48,.34); padding: 6px 12px; border-radius: 999px; backdrop-filter: blur(2px); }
.proj:hover .proj__ph::after { opacity: .6; transform: translateY(-3px); transition: .5s var(--ease); }
.proj__cap {
  position: absolute; inset: auto 0 0 0; padding: 26px 20px 18px; z-index: 3;
  background: linear-gradient(transparent, rgba(8,24,40,.40) 35%, rgba(8,24,40,.92));
  color: #fff; transition: padding-bottom .35s var(--ease);
}
.proj:hover .proj__cap { padding-bottom: 24px; }
.proj__cap b { display: block; font-size: 1.05rem; padding-right: 28px; }
.proj__cap span { font-size: .8rem; color: var(--blue-300); }
.proj__cap::after {                  /* reveal arrow on hover */
  content: "→"; position: absolute; right: 18px; bottom: 18px; font-size: 1.1rem; font-weight: 700;
  color: #fff; opacity: 0; transform: translateX(-8px); transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.proj:hover .proj__cap::after { opacity: 1; transform: none; }

/* Rich project card (real projects) */
.work { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.work__img { aspect-ratio: 16/10; position: relative; overflow: hidden; }
.work__img .proj__ph { border-radius: 0; }
.work__img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s var(--ease); }
.work:hover .work__img img { transform: scale(1.05); }
.work__body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.work__client { font-size: .85rem; color: var(--blue-700); font-weight: 600; margin: 2px 0 8px; }
.work h3 { margin: 0 0 4px; }
.work__body p { margin: 0 0 4px; font-size: .92rem; }
.work__more { display: inline-block; margin-top: 12px; font-weight: 700; font-size: .9rem; color: var(--blue-700);
  align-self: flex-start; transition: gap .2s, color .2s; }
.work__more:hover { color: var(--blue-900); letter-spacing: .01em; }

/* ============================================================
   VIDEO
   ============================================================ */
.vidcard { margin: 0; border-radius: var(--radius); overflow: hidden; background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow-sm); transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.vidcard:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.vidcard video { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; background: #000; }
.vidcard figcaption { padding: 13px 16px; font-weight: 600; font-size: .92rem; color: var(--ink); }
.showreel { position: relative; border-radius: 24px; overflow: hidden; box-shadow: var(--shadow); background: #000; }
.showreel video { width: 100%; display: block; aspect-ratio: 16/9; object-fit: cover; background: #000; }

/* ============================================================
   TIMELINE
   ============================================================ */
.timeline { position: relative; max-width: 940px; margin: 0 auto; padding: 8px 0; }
.timeline::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 3px; transform: translateX(-50%);
  background: linear-gradient(var(--blue-300), var(--line)); border-radius: 3px;
}
.tl-spacer { display: none; }
.tl-item { position: relative; width: 50%; box-sizing: border-box; margin-bottom: 30px; }
.tl-item:nth-child(odd)  { left: 0;   padding-right: 54px; }
.tl-item:nth-child(even) { left: 50%; padding-left: 54px; }

.tl-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: transform .35s var(--ease), box-shadow .35s var(--ease); }
.tl-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.tl-card img { aspect-ratio: 16/10; object-fit: cover; width: 100%; display: block; transition: transform .55s var(--ease); }
.tl-card:hover img { transform: scale(1.06); }
.tl-card .tl-body { padding: 15px 18px; }
.tl-card h4 { margin: 0 0 4px; color: var(--blue-700); font-size: 1.05rem; }
.tl-card p { margin: 0; font-size: .88rem; }

.tl-year {
  position: absolute; top: 4px; z-index: 2;
  width: 58px; height: 58px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: .82rem; color: #fff;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  box-shadow: 0 0 0 6px var(--bg), 0 8px 18px rgba(17,90,158,.35);
  transition: transform .45s var(--ease) .12s;
}
.tl-item:nth-child(odd)  .tl-year { right: -29px; }
.tl-item:nth-child(even) .tl-year { left: -29px; }

/* Directional reveal + badge pop (desktop) */
@media (min-width: 921px) {
  .tl-item.reveal { opacity: 0; transform: translateX(-50px); }
  .tl-item:nth-child(even).reveal { transform: translateX(50px); }
  .tl-item.reveal.in { opacity: 1; transform: none; }
  .tl-item.reveal .tl-year { transform: scale(0); }
  .tl-item.reveal.in .tl-year { transform: scale(1); }
}

/* ============================================================
   LEADERSHIP / PEOPLE
   ============================================================ */
.person { text-align: center; }
.person__ph {
  width: 110px; height: 110px; border-radius: 50%; margin: 0 auto 16px;
  background: linear-gradient(140deg,var(--blue-300),var(--blue-700)); color:#fff;
  display: grid; place-items: center; font-size: 2rem; font-weight: 800;
}
.person h4 { margin: 0; }
.person .role { color: var(--blue-700); font-weight: 600; font-size: .88rem; }
.person .field { color: var(--muted); font-size: .85rem; }

/* ============================================================
   CERT / CAPACITY
   ============================================================ */
.cert {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; background: var(--card);
  display: flex; gap: 18px; align-items: flex-start;
}
.cert__badge {
  flex: none; width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center;
  background: var(--blue-50); color: var(--blue-700);
}
.cert h4 { margin: 0 0 4px; }
.cert p { margin: 0; font-size: .9rem; }
.tag { display:inline-block; background: var(--blue-50); color: var(--blue-700); font-size: .72rem; font-weight: 700; padding: 4px 10px; border-radius: 999px; margin-top: 8px; }

.specs { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2,1fr); gap: 12px 28px; }
.specs li { display: flex; justify-content: space-between; border-bottom: 1px dashed var(--line); padding: 10px 0; font-size: .92rem; }
.specs li b { color: var(--blue-900); }

/* ============================================================
   CLIENTS / PARTNERS
   ============================================================ */
.client {
  display: flex; align-items: center; gap: 13px; padding: 16px 18px;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.client:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: var(--blue-300); }
.client .ci {
  flex: none; width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--blue-50), rgba(31,143,214,.18)); color: var(--blue-700);
  font-weight: 800; font-size: .95rem;
}
.client b { font-size: .9rem; font-weight: 600; line-height: 1.3; color: var(--ink); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.info-item { display: flex; gap: 14px; margin-bottom: 22px; }
.info-item .ico { flex: none; width: 44px; height: 44px; border-radius: 12px; background: var(--blue-50); color: var(--blue-700); display: grid; place-items: center; }
.info-item b { display: block; }
.info-item span { color: var(--muted); font-size: .92rem; }
.field-group { margin-bottom: 16px; }
.field-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; }
.field-group input, .field-group textarea {
  width: 100%; padding: 13px 15px; border: 1.5px solid var(--line); border-radius: 12px;
  font: inherit; color: var(--ink); transition: border-color .2s;
}
.field-group input:focus, .field-group textarea:focus { outline: none; border-color: var(--blue-500); }
.map { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); min-height: 280px; }
.map iframe { width: 100%; height: 100%; border: 0; min-height: 280px; }

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
  background: linear-gradient(135deg, var(--blue-700), var(--blue-900));
  border-radius: 24px; padding: 60px; text-align: center; color: #fff; position: relative; overflow: hidden;
}
.cta-banner::after {
  content:""; position:absolute; right:-40px; top:-40px; width:240px; height:240px; border-radius:50%;
  background: var(--rainbow); opacity:.18; filter: blur(10px);
}
.cta-banner h2 { color: #fff; position: relative; }
.cta-banner p { color: var(--blue-300); position: relative; }

/* ============================================================
   PAGE HEADER (inner pages)
   ============================================================ */
.page-hero { background: var(--blue-900); color: #fff; padding: 72px 0; position: relative; overflow: hidden; }
.page-hero::after {
  content:""; position:absolute; right:-6%; bottom:-40%; width:420px; height:420px; border-radius:50%;
  background: var(--rainbow); opacity:.14;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { color: #fff; margin-bottom: 8px; }
.page-hero p { color: var(--blue-300); margin: 0; max-width: 640px; }
.crumbs { font-size: .82rem; color: var(--blue-300); margin-bottom: 18px; }
.crumbs a:hover { color:#fff; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: #0a1822; color: #b8c4cf; padding: 64px 0 28px; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.footer h4 { color: #fff; font-size: 1rem; margin-bottom: 18px; }
.footer a { display: block; color: #9fb0bd; font-size: .92rem; padding: 5px 0; }
.footer a:hover { color: #fff; }
.footer__brand p { color: #8a98a5; font-size: .9rem; }
.footer__bottom { border-top: 1px solid #1c2c38; margin-top: 44px; padding-top: 22px; display: flex; justify-content: space-between; font-size: .85rem; color: #7c8a96; flex-wrap: wrap; gap: 10px; }

/* ============================================================
   FLOATING CONTACT
   ============================================================ */
.float { position: fixed; right: 18px; bottom: 18px; z-index: 60; display: flex; flex-direction: column; gap: 12px; }
.float a {
  width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; color:#fff;
  box-shadow: var(--shadow); transition: transform .2s;
}
.float a:hover { transform: scale(1.08); }
.float .call { background: var(--blue-700); }
.float .zalo { background: #0068ff; font-weight: 800; font-size: .8rem; }

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed; inset: 0; z-index: 100; display: none;
  background: rgba(8,16,24,.92); align-items: center; justify-content: center; padding: 30px;
}
.lightbox.open { display: flex; }
.lightbox__fig { margin: 0; display: flex; flex-direction: column; align-items: center; max-width: 92vw; }
.lightbox img { max-width: 92vw; max-height: 82vh; border-radius: 10px; box-shadow: 0 20px 60px rgba(0,0,0,.6); }
.lightbox__cap { margin-top: 14px; text-align: center; color: #cfe0ee; font-size: .92rem; font-weight: 500; }
.lightbox__close, .lightbox__nav {
  position: absolute; border: 0; background: rgba(255,255,255,.12); color: #fff; cursor: pointer;
  display: grid; place-items: center; border-radius: 50%; transition: background .2s, transform .2s;
}
.lightbox__close { top: 20px; right: 24px; width: 44px; height: 44px; font-size: 1.5rem; }
.lightbox__nav { top: 50%; transform: translateY(-50%); width: 54px; height: 54px; font-size: 2rem; line-height: 1; }
.lightbox__prev { left: 22px; }
.lightbox__next { right: 22px; }
.lightbox__close:hover { background: rgba(255,255,255,.28); }
.lightbox__nav:hover { background: rgba(255,255,255,.28); transform: translateY(-50%) scale(1.08); }
[data-lightbox] { cursor: zoom-in; }
@media (max-width: 640px){ .lightbox__nav { width: 44px; height: 44px; font-size: 1.6rem; }
  .lightbox__prev { left: 8px; } .lightbox__next { right: 8px; } }

/* Scroll-to-top */
.to-top {
  position: fixed; left: 18px; bottom: 18px; z-index: 61; width: 46px; height: 46px; border-radius: 50%;
  border: 0; cursor: pointer; background: var(--blue-900); color: #fff; display: grid; place-items: center;
  box-shadow: var(--shadow); opacity: 0; transform: translateY(12px); pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease), background .2s;
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { background: var(--blue-700); }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal, .tl-item.reveal, .tl-item:nth-child(even).reveal { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   i18n helpers
   ============================================================ */
[data-en] { } /* swapped by JS */

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 920px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { max-width: 420px; }
  .grid--4 { grid-template-columns: repeat(2,1fr); }
  .grid--3 { grid-template-columns: repeat(2,1fr); }
  .stripe__grid { grid-template-columns: repeat(2,1fr); }
  .contact__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .timeline { max-width: none; }
  .timeline::before { left: 27px; }
  .tl-item, .tl-item:nth-child(odd), .tl-item:nth-child(even) {
    width: 100%; left: 0; padding: 0 0 0 72px;
  }
  .tl-item:nth-child(odd) .tl-year, .tl-item:nth-child(even) .tl-year {
    left: 0; right: auto; width: 54px; height: 54px;
  }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .menu { display: none; }
  .nav__cta { display: none; }
  .burger { display: block; }
  .menu.open {
    display: flex; position: absolute; top: 74px; left: 0; right: 0; flex-direction: column;
    background: var(--card); border-bottom: 1px solid var(--line); padding: 18px 24px; gap: 14px; box-shadow: var(--shadow);
  }
  .grid--4, .grid--3, .grid--2, .specs { grid-template-columns: 1fr; }
  .stripe__grid { grid-template-columns: repeat(2,1fr); }
  .footer__grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 40px 24px; }
  .hero__stats { gap: 22px; }
}