/* ============================================================
   PHÁT MẠNH PHONG - Structural Elegance Design System
   ============================================================ */
:root {
  --surface: #f7f9fb;
  --surface-dim: #d8dadc;
  --surface-bright: #ffffff;
  --surface-container: #eceef0;
  --surface-container-low: #f2f4f6;

  --on-surface: #191c1e;
  --on-surface-variant: #45474a;
  --inverse-surface: #2d3133;
  --inverse-on-surface: #eff1f3;
  --outline: #75777b;
  --outline-variant: #c5c6ca;

  --primary: #17191c;
  --on-primary: #ffffff;
  --primary-container: #2c2e31;

  --secondary: #595f66;
  --secondary-container: #dde3eb;

  --gold: #b39150;
  --gold-bright: #e7c17c;
  --gold-deep: #3e2b00;
  --on-gold: #ffffff;

  --error: #ba1a1a;
  --error-container: #ffdad6;

  --line: #e2e8f0;

  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;

  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 8px;
  --r-xl: 12px;
  --r-full: 9999px;

  --shadow-1: 0 1px 2px rgba(44,46,49,.06);
  --shadow-2: 0 12px 28px rgba(44,46,49,.08), 0 4px 12px rgba(44,46,49,.05);
  --shadow-3: 0 24px 48px rgba(44,46,49,.12);

  --container: 1280px;
  --gutter: 24px;
  --header-h: 76px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--on-surface);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; color: var(--on-surface); }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.3rem); letter-spacing: -0.01em; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- Utilities ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--surface-container-low); }

.eyebrow {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--gold); }

.body-lg { font-size: 1.125rem; color: var(--on-surface-variant); }

.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-head .eyebrow { justify-content: center; }
.section-head .eyebrow::before { display: none; }
.section-head p.body-lg { margin-top: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .95rem;
  padding: 13px 24px;
  border-radius: var(--r-md);
  transition: all .25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn i { font-size: 1.15rem; }
/* Hiệu ứng ánh sáng lướt qua rất nhẹ khi hover */
.btn::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 45%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,.28), transparent);
  transform: translateX(-130%) skewX(-18deg);
  transition: transform .55s ease;
  pointer-events: none;
}
.btn:hover::after { transform: translateX(300%) skewX(-18deg); }
.btn-lg { padding: 15px 30px; font-size: 1rem; }
.btn-sm { padding: 9px 16px; font-size: .85rem; }
.btn-block { width: 100%; }

.btn-primary { background: var(--primary); color: var(--on-primary); box-shadow: inset 0 -2px 0 rgba(0,0,0,.25); }
.btn-primary:hover { background: var(--primary-container); transform: translateY(-2px); box-shadow: var(--shadow-2); }

.btn-accent { background: linear-gradient(135deg, var(--gold-bright), var(--gold)); color: var(--on-gold); }
.btn-accent:hover { filter: brightness(1.08); transform: translateY(-2px); box-shadow: var(--shadow-2); }

.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: var(--gold-bright); color: var(--gold-deep); transform: translateY(-2px); }

.btn-gold-outline { border: 1px solid rgba(255,255,255,.4); color: #fff; background: rgba(255,255,255,.08); }
.btn-gold-outline:hover { background: #fff; color: var(--primary); }

/* Nút "Kết bạn Zalo" & Biểu tượng Zalo */
.zalo-svg {
  display: inline-block;
  width: 1.25em;
  height: 1.25em;
  vertical-align: middle;
  flex-shrink: 0;
}
.btn .zalo-svg {
  width: 1.35em;
  height: 1.35em;
  margin-right: 4px;
}
.float-zalo .zalo-svg {
  width: 28px;
  height: 28px;
}
.socials a .zalo-svg {
  width: 24px;
  height: 24px;
}

.btn-zalo {
  background: #0068ff !important;
  color: #ffffff !important;
  border: 1px solid #0068ff !important;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-zalo:hover {
  background: #0052cc !important;
  border-color: #0052cc !important;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 104, 255, 0.35);
}

.btn-ghost { border-color: rgba(255,255,255,.45); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: all .3s ease;
}
.site-header.scrolled,
.site-header.menu-open {
  background: rgba(255,255,255,.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-2);
}
.site-header.scrolled .nav-link { color: var(--on-surface); }
.site-header.scrolled .brand-text strong { color: var(--on-surface); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 20px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo-img {
  width: 46px;
  height: 46px;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1.5px solid var(--gold-bright);
  box-shadow: 0 4px 14px rgba(231, 193, 124, 0.35);
  transition: transform .3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow .3s ease;
  background: #17191c;
}
.brand:hover .brand-logo-img {
  transform: scale(1.08) rotate(1deg);
  box-shadow: 0 6px 18px rgba(231, 193, 124, 0.55);
}
.preloader-logo-img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 2px solid var(--gold-bright);
  box-shadow: 0 0 24px rgba(231, 193, 124, 0.6);
  animation: preloaderPulse 1.8s ease-in-out infinite alternate;
}
@keyframes preloaderPulse {
  0% { transform: scale(0.95); filter: drop-shadow(0 0 8px rgba(231, 193, 124, 0.4)); }
  100% { transform: scale(1.05); filter: drop-shadow(0 0 24px rgba(231, 193, 124, 0.9)); }
}

.brand-mark {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
  color: var(--gold-deep);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-2);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-family: var(--font-display); font-size: 1rem; letter-spacing: .02em; color: #fff; }
.site-header.scrolled .brand-text strong { color: var(--on-surface); }
.brand-text small { font-size: .62rem; letter-spacing: .18em; color: var(--gold); font-weight: 600; text-transform: uppercase; }

.main-nav ul { display: flex; gap: 6px; }
.main-nav .nav-link {
  display: block;
  padding: 10px 14px;
  font-size: .92rem;
  font-weight: 500;
  color: rgba(255,255,255,.9);
  border-radius: var(--r-sm);
  transition: all .2s;
  position: relative;
}
.main-nav .nav-link:hover { color: var(--gold-bright); }
.main-nav .nav-link.active { color: var(--gold-bright); }
.main-nav .nav-link::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 6px;
  height: 2px; background: var(--gold); border-radius: 2px;
  transform: scaleX(0); transform-origin: left; opacity: 0;
  transition: transform .3s ease, opacity .3s ease;
}
.main-nav .nav-link:hover::after,
.main-nav .nav-link.active::after { transform: scaleX(1); opacity: 1; }
.site-header.scrolled .main-nav .nav-link { color: var(--on-surface); }

.header-actions { display: flex; align-items: center; gap: 16px; }
.hotline { display: flex; align-items: center; gap: 8px; color: #fff; font-weight: 600; font-size: .9rem; }
.site-header.scrolled .hotline { color: var(--on-surface); }
.hotline i { font-size: 1.3rem; color: var(--gold-bright); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: all .3s; }
.site-header.scrolled .nav-toggle span { background: var(--on-surface); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay { position: fixed; inset: 0; background: rgba(23,25,28,.5); z-index: 90; opacity: 0; visibility: hidden; transition: all .3s; backdrop-filter: blur(2px); }
.nav-overlay.show { opacity: 1; visibility: visible; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; color: #fff; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(100deg, rgba(23,25,28,.82) 20%, rgba(23,25,28,.45) 60%, rgba(23,25,28,.25)); }
.hero-content { position: relative; z-index: 2; padding-top: var(--header-h); }
.hero h1 { color: #fff; margin: 12px 0 24px; max-width: 760px; }
.hero h1 span {
  background: linear-gradient(90deg, var(--gold-bright), var(--gold));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .eyebrow { margin-bottom: 18px; }
.hero-desc { font-size: 1.15rem; color: rgba(255,255,255,.85); max-width: 620px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 60px; }

.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; max-width: 820px; }
.stat { border-left: 1px solid rgba(255,255,255,.25); padding-left: 20px; }
.stat-num { font-family: var(--font-display); font-weight: 800; font-size: 2.2rem; color: var(--gold-bright); }
.stat-suffix { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; color: var(--gold-bright); }
.stat p { color: rgba(255,255,255,.8); font-size: .9rem; margin-top: 4px; }

.scroll-down {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  color: #fff; font-size: 1.8rem; z-index: 2; animation: bounce 2s infinite;
}
@keyframes bounce { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,10px); } }

/* ---------- Brand strip ---------- */
.brand-strip { background: var(--primary); padding: 22px 0; }
.brand-strip-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.strip-label { font-family: var(--font-display); font-size: .72rem; letter-spacing: .2em; color: var(--gold); font-weight: 600; }
.brand-strip-items { display: flex; gap: 32px; flex-wrap: wrap; }
.brand-strip-items div { font-family: var(--font-display); font-weight: 600; font-size: .9rem; color: rgba(255,255,255,.55); letter-spacing: .06em; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-media { position: relative; }
.about-media img { border-radius: var(--r-xl); box-shadow: var(--shadow-3); width: 100%; height: 460px; object-fit: cover; }
.about-badge {
  position: absolute; left: -24px; bottom: -24px;
  display: flex; align-items: center; gap: 14px;
  padding: 20px 24px; border-radius: var(--r-xl);
  background: rgba(255,255,255,.7); border: 1px solid var(--line);
  backdrop-filter: blur(10px); box-shadow: var(--shadow-2);
}
.about-badge i { font-size: 2.2rem; color: var(--gold); }
.about-badge strong { display: block; font-family: var(--font-display); color: var(--on-surface); }
.about-badge span { font-size: .82rem; color: var(--on-surface-variant); }
.about-content h2 { margin-bottom: 18px; }
.about-content .body-lg { margin-bottom: 18px; }
.about-content > p:not(.body-lg) { color: var(--on-surface-variant); margin-bottom: 18px; }

.check-list { margin: 22px 0 30px; display: grid; gap: 12px; }
.check-list li { display: flex; align-items: flex-start; gap: 10px; color: var(--on-surface); }
.check-list i { color: var(--gold); font-size: 1.3rem; }

.glass {
  position: relative;
  background: rgba(255,255,255,.55);
  border: 1px solid rgba(255,255,255,.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* ---------- Filter bar ---------- */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 42px; }
.filter-btn {
  padding: 10px 20px; border-radius: var(--r-full);
  font-size: .9rem; font-weight: 600;
  color: var(--on-surface-variant);
  background: var(--surface-container);
  border: 1px solid transparent;
  transition: all .2s;
}
.filter-btn:hover { color: var(--primary); }
.filter-btn.active { background: var(--primary); color: #fff; box-shadow: var(--shadow-2); }

.nav-highlight { color: var(--gold-bright) !important; font-weight: 700; }
.nav-highlight i { margin-right: 2px; }

/* ---------- Products ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
  border-radius: var(--r-xl);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-3); }
.product-img { position: relative; overflow: hidden; aspect-ratio: 4/3; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.product-card:hover .product-img img { transform: scale(1.04); }
.badge {
  position: absolute; top: 14px; left: 14px;
  background: var(--primary); color: var(--gold-bright);
  font-size: .72rem; font-weight: 700; letter-spacing: .06em;
  padding: 6px 12px; border-radius: var(--r-full);
}
.badge-gold { background: linear-gradient(135deg, var(--gold-bright), var(--gold)); color: var(--gold-deep); }
.product-body { padding: 22px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.product-body h3 { font-size: 1.15rem; }
.product-body p { color: var(--on-surface-variant); font-size: .93rem; flex: 1; }
.product-actions { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 6px; padding-top: 12px; border-top: 1px solid rgba(0,0,0,.06); flex-wrap: wrap; }
.btn-product-spec {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: .85rem; font-weight: 600; color: var(--primary);
  background: var(--surface-container-high); padding: 7px 12px;
  border-radius: var(--r-md); transition: all .2s;
}
.btn-product-spec:hover { background: var(--primary); color: #fff; }
.product-link { display: inline-flex; align-items: center; gap: 6px; color: var(--gold); font-weight: 600; font-size: .92rem; }
.product-link:hover { color: var(--gold-deep); }
.product-link i { transition: transform .2s; }
.product-link:hover i { transform: translateX(4px); }

/* ---------- Calculator (Cost Estimator) ---------- */
.calc-wrapper {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 32px;
  padding: 36px;
  border-radius: var(--r-xl);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-3);
}
.calc-config {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.calc-step {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.calc-step-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
.step-badge {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--gold-bright);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .85rem;
  flex-shrink: 0;
}
.calc-step-header h4 {
  font-size: 1.05rem;
  margin: 0;
}
.calc-step-header small {
  color: var(--on-surface-variant);
  font-size: .82rem;
}
.calc-options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.calc-option {
  cursor: pointer;
}
.calc-option input[type="radio"] {
  display: none;
}
.option-card {
  height: 100%;
  padding: 14px 12px;
  border-radius: var(--r-lg);
  background: var(--surface-bright);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  transition: all .25s ease;
}
.option-card i {
  font-size: 1.4rem;
  color: var(--gold);
  margin-bottom: 2px;
}
.option-card strong {
  font-size: .88rem;
  font-family: var(--font-display);
  color: var(--on-surface);
  line-height: 1.3;
}
.option-card span {
  font-size: .75rem;
  color: var(--on-surface-variant);
}
.calc-option.active .option-card,
.calc-option input[type="radio"]:checked + .option-card {
  border-color: var(--gold);
  background: rgba(179, 145, 80, 0.08);
  box-shadow: 0 0 0 1px var(--gold);
}
.calc-step-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.calc-chips {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.calc-chip {
  cursor: pointer;
}
.calc-chip input[type="radio"] {
  display: none;
}
.calc-chip span {
  display: block;
  padding: 9px 14px;
  border-radius: var(--r-md);
  background: var(--surface-bright);
  border: 1px solid var(--line);
  font-size: .84rem;
  font-weight: 500;
  color: var(--on-surface);
  transition: all .2s;
}
.calc-chip.active span,
.calc-chip input[type="radio"]:checked + span {
  border-color: var(--gold);
  background: var(--primary);
  color: var(--gold-bright);
  box-shadow: var(--shadow-1);
}
.calc-area-control {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--surface-bright);
  padding: 16px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
}
.area-slider-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.area-slider-wrap input[type="range"] {
  width: 100%;
  accent-color: var(--gold);
  cursor: pointer;
}
.range-ticks {
  display: flex;
  justify-content: space-between;
  font-size: .72rem;
  color: var(--on-surface-variant);
}
.area-input-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 110px;
}
.area-input-box label {
  font-size: .75rem;
  font-weight: 600;
  color: var(--on-surface-variant);
}
.input-unit {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: #fff;
  padding: 0 8px;
}
.input-unit input {
  width: 60px;
  border: none;
  font-weight: 700;
  font-size: 1rem;
  padding: 6px 0;
  color: var(--primary);
  text-align: center;
}
.input-unit input:focus {
  outline: none;
}
.input-unit span {
  font-size: .85rem;
  font-weight: 600;
  color: var(--on-surface-variant);
}

/* Calculator Summary Panel */
.calc-summary {
  position: relative;
}
.summary-card {
  position: sticky;
  top: 96px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--r-xl);
  padding: 28px;
  box-shadow: var(--shadow-3);
  display: flex;
  flex-direction: column;
  gap: 20px;
  border: 1px solid rgba(231, 193, 124, 0.25);
}
.summary-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--gold-bright);
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 10px;
  border-radius: var(--r-full);
  margin-bottom: 8px;
}
.summary-header h3 {
  color: #fff;
  font-size: 1.25rem;
  margin-bottom: 4px;
}
.summary-header p {
  color: rgba(255, 255, 255, 0.7);
  font-size: .84rem;
}
.summary-price-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--r-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.quote-privilege-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.quote-privilege-item i {
  font-size: 1.35rem;
  color: var(--gold-bright);
  flex-shrink: 0;
  margin-top: 2px;
}
.quote-privilege-item strong {
  display: block;
  font-size: .88rem;
  color: #fff;
  font-family: var(--font-display);
}
.quote-privilege-item p {
  font-size: .78rem;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.35;
  margin-top: 2px;
}

.quick-quote-box {
  background: rgba(0, 0, 0, 0.22);
  padding: 16px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(231, 193, 124, 0.35);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.quick-quote-box label {
  font-size: .8rem;
  font-weight: 600;
  color: var(--gold-bright);
}
.quick-quote-inputs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.quick-quote-inputs input {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--r-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary);
  font-size: .88rem;
}
.quick-quote-inputs input:focus {
  outline: none;
  background: #fff;
  border-color: var(--gold-bright);
  box-shadow: 0 0 0 2px rgba(231, 193, 124, 0.3);
}

.summary-perks h5 {
  color: var(--gold-bright);
  font-size: .8rem;
  letter-spacing: .05em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.summary-perks ul {
  display: grid;
  gap: 8px;
}
.summary-perks li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: .82rem;
  color: rgba(255, 255, 255, 0.85);
}
.summary-perks i {
  color: var(--gold-bright);
  font-size: 1rem;
  margin-top: 2px;
  flex-shrink: 0;
}
.btn-transfer-estimate {
  padding: 14px;
  font-size: .95rem;
}
.quick-call-hint {
  text-align: center;
  font-size: .8rem;
  color: rgba(255, 255, 255, 0.7);
}
.quick-call-hint strong {
  color: var(--gold-bright);
}

/* ---------- Features (why us) ---------- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature {
  background: var(--surface-bright); border: 1px solid var(--line);
  border-radius: var(--r-xl); padding: 30px;
  transition: transform .3s, box-shadow .3s;
}
.feature:hover { transform: translateY(-5px); box-shadow: var(--shadow-2); }
.feature i { font-size: 2.4rem; color: var(--gold); margin-bottom: 16px; display: inline-block; }
.feature h3 { font-size: 1.1rem; margin-bottom: 10px; }
.feature p { color: var(--on-surface-variant); font-size: .93rem; }

/* ---------- Process ---------- */
.process-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.process-step { text-align: center; position: relative; padding: 30px 18px; }
.process-step .step-num {
  font-family: var(--font-display); font-weight: 800; font-size: 3rem;
  color: transparent; -webkit-text-stroke: 1.5px var(--gold);
  display: block; margin-bottom: 10px;
}
.process-step i { font-size: 2rem; color: var(--primary); margin-bottom: 14px; }
.process-step h3 { font-size: 1rem; margin-bottom: 8px; }
.process-step p { font-size: .86rem; color: var(--on-surface-variant); }

/* ---------- Projects ---------- */
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.project-card {
  position: relative; border-radius: var(--r-xl); overflow: hidden;
  cursor: zoom-in; aspect-ratio: 4/3;
}
.project-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.project-card:hover img { transform: scale(1.04); }
.project-card figcaption {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 22px;
  background: linear-gradient(180deg, transparent 40%, rgba(23,25,28,.85));
  opacity: 0; transition: opacity .3s;
}
.project-card:hover figcaption { opacity: 1; }
.project-tag {
  align-self: flex-start; font-size: .7rem; font-weight: 700; letter-spacing: .08em;
  color: var(--gold-bright); background: rgba(23,25,28,.6);
  padding: 5px 12px; border-radius: var(--r-full); margin-bottom: 10px;
}
.project-card h3 { color: #fff; font-size: 1.1rem; }
.project-card p { color: rgba(255,255,255,.8); font-size: .85rem; }

/* ---------- Testimonials ---------- */
.testimonial-slider { max-width: 800px; margin: 0 auto; position: relative; }
.testimonial-track { overflow: hidden; }
.testimonial-track .track { display: flex; transition: transform .5s ease; }
.testimonial-slide { min-width: 100%; padding: 30px; text-align: center; }
.quote-icon { font-size: 2.6rem; color: var(--gold); margin-bottom: 16px; }
.quote-text { font-size: 1.15rem; color: var(--on-surface); font-style: italic; max-width: 700px; margin: 0 auto 24px; }
.quote-author { display: flex; align-items: center; gap: 14px; justify-content: center; }
.avatar {
  width: 52px; height: 52px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: var(--gold-bright); font-family: var(--font-display); font-weight: 700;
}
.quote-author div { text-align: left; }
.quote-author strong { display: block; font-family: var(--font-display); }
.quote-author span { font-size: .85rem; color: var(--on-surface-variant); }

.slider-nav { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 24px; }
.slider-btn {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; font-size: 1.4rem;
  background: var(--surface-bright); border: 1px solid var(--line);
  color: var(--on-surface); transition: all .2s;
}
.slider-btn:hover { background: var(--primary); color: #fff; }
.slider-dots { display: flex; gap: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--outline-variant); transition: all .2s; cursor: pointer; }
.dot.active { background: var(--gold); width: 26px; border-radius: var(--r-full); }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(120deg, var(--primary), var(--primary-container));
  padding: 72px 0; position: relative; overflow: hidden;
}
.cta-banner::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 30%, rgba(183,145,80,.25), transparent 50%);
}
.cta-inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; z-index: 2; }
.cta-desc { max-width: 560px; }
.cta-desc h2 { color: #fff; margin-bottom: 12px; }
.cta-desc p { color: rgba(255,255,255,.75); }
.cta-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-info h2 { margin-bottom: 16px; }
.contact-info > p:not(.eyebrow) { color: var(--on-surface-variant); margin-bottom: 28px; }
.contact-list { display: grid; gap: 20px; margin-bottom: 28px; }
.contact-list li { display: flex; gap: 14px; align-items: flex-start; }
.contact-list i { font-size: 1.5rem; color: var(--gold); margin-top: 2px; }
.contact-list strong { display: block; font-family: var(--font-display); }
.contact-list span, .contact-list a { color: var(--on-surface-variant); font-size: .93rem; }
.contact-list a:hover { color: var(--gold); }

/* Số hotline & email xếp dọc trong khu vực liên hệ */
.contact-phones, .contact-emails { display: flex; flex-direction: column; gap: 2px; }
.contact-phones a, .contact-emails a { padding: 3px 0; }

/* Nút "Xem bản đồ / Chỉ đường" */
.contact-list .map-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 8px; min-height: 40px;
  color: var(--gold); font-weight: 600; font-size: .9rem;
  transition: color .2s;
}
.contact-list .map-link:hover { color: var(--gold-deep); }
.contact-list .map-link i { font-size: 1.15rem; color: inherit; margin-top: 0; }

.socials { display: flex; gap: 12px; }
.socials a {
  width: 42px; height: 42px; border-radius: var(--r-lg);
  display: grid; place-items: center; font-size: 1.5rem;
  background: var(--surface-container); color: var(--on-surface-variant);
  transition: all .2s;
}
.socials a:hover { background: var(--primary); color: var(--gold-bright); transform: translateY(-3px); }

.contact-form-wrap {
  background: var(--surface-bright); border: 1px solid var(--line);
  border-radius: var(--r-xl); padding: 36px; box-shadow: var(--shadow-2);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: .86rem; font-weight: 600; margin-bottom: 8px; }
.form-group label span { color: var(--error); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px;
  border: none; border-bottom: 1px solid var(--outline-variant);
  border-radius: var(--r-sm) var(--r-sm) 0 0;
  background: var(--surface-container);
  color: var(--on-surface); outline: none;
  transition: border-color .2s, background .2s;
}
.form-group select { cursor: pointer; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-bottom-color: var(--primary); background: var(--surface-bright);
}
.form-group input.invalid, .form-group textarea.invalid { border-bottom-color: var(--error); }
.err-msg { display: block; min-height: 16px; font-size: .78rem; color: var(--error); margin-top: 4px; }

.form-check { display: flex; gap: 10px; align-items: flex-start; margin: 6px 0 20px; }
.form-check input { margin-top: 4px; accent-color: var(--gold); }
.form-check label { font-size: .84rem; color: var(--on-surface-variant); }

.btn-spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.3); border-top-color: #fff;
  animation: spin .7s linear infinite;
  display: none;
}
@keyframes spin { to { transform: rotate(360deg); } }
.btn.loading .btn-spinner { display: inline-block; }
.btn.loading .btn-label, .btn.loading .submit-icon { display: none; }

.form-success { text-align: center; padding: 30px 10px; }
.form-success i { font-size: 3rem; color: #2e9e5b; margin-bottom: 14px; }
.form-success h3 { margin-bottom: 10px; }
.form-success p { color: var(--on-surface-variant); margin-bottom: 20px; }

/* Contact Google Map */
.contact-map-wrap {
  margin-top: 24px;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-2);
  background: var(--surface-container);
}
.contact-map-wrap iframe {
  display: block;
  width: 100%;
}

/* ---------- Product Specs Modal ---------- */
.spec-modal {
  position: fixed; inset: 0; z-index: 210;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: all .3s ease;
  padding: 20px;
}
.spec-modal.open { opacity: 1; visibility: visible; }
.spec-modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(10, 12, 14, 0.82);
  backdrop-filter: blur(8px);
}
.spec-modal-dialog {
  position: relative; z-index: 2;
  width: min(840px, 94vw);
  max-height: 90vh;
  overflow-y: auto;
  background: #ffffff;
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-3);
  padding: 32px;
  transform: translateY(20px) scale(0.97);
  transition: transform .3s cubic-bezier(.22, 1, .36, 1);
}
.spec-modal.open .spec-modal-dialog {
  transform: translateY(0) scale(1);
}
.spec-modal-close {
  position: absolute; top: 20px; right: 20px;
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--surface-container); color: var(--primary);
  display: grid; place-items: center; font-size: 1.5rem;
  transition: all .2s;
}
.spec-modal-close:hover { background: var(--primary); color: #fff; }
.spec-modal-header { margin-bottom: 24px; padding-right: 40px; }
.spec-modal-header h3 { font-size: 1.5rem; margin-top: 4px; }
.spec-modal-body {
  display: grid; grid-template-columns: 1fr 1.25fr; gap: 28px;
}
.spec-modal-media img {
  width: 100%; height: 220px; object-fit: cover;
  border-radius: var(--r-lg); box-shadow: var(--shadow-2);
}
.color-palette-box {
  margin-top: 16px;
  background: var(--surface-container-low);
  padding: 14px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
}
.color-palette-box h6 {
  font-size: .78rem; font-family: var(--font-display);
  color: var(--on-surface-variant); margin-bottom: 10px;
}
.color-swatches {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px;
}
.swatch-btn {
  width: 32px; height: 32px; border-radius: 50%;
  cursor: pointer; transition: transform .2s, box-shadow .2s;
  position: relative;
}
.swatch-btn:hover { transform: scale(1.15); }
.swatch-btn.active {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--gold);
  transform: scale(1.1);
}
.selected-color-name {
  font-size: .8rem; color: var(--on-surface); display: block;
}
.selected-color-name strong { color: var(--gold-deep); }
.spec-table-wrap { margin-bottom: 20px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .86rem; }
.spec-table td { padding: 10px 12px; border-bottom: 1px solid var(--line); }
.spec-table tr td:first-child { width: 42%; color: var(--on-surface-variant); }
.spec-table tr td:first-child i { color: var(--gold); margin-right: 4px; vertical-align: middle; }
.spec-table tr td:last-child { font-weight: 500; color: var(--on-surface); }
.spec-modal-actions { display: flex; flex-direction: column; gap: 10px; }

/* ---------- Floating Quick Contact Widget ---------- */
.floating-widget {
  position: fixed;
  right: 24px;
  bottom: 86px;
  z-index: 140;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}
.floating-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: var(--shadow-3);
  font-size: 1.4rem;
  position: relative;
  transition: transform .25s ease, filter .25s ease;
}
.floating-btn:hover {
  transform: scale(1.12);
}
.float-calc {
  background: var(--primary);
  color: var(--gold-bright);
  border: 1px solid var(--gold);
}
.float-zalo {
  background: #0068ff;
  font-size: 1.5rem;
}
.float-phone {
  background: linear-gradient(135deg, #e7c17c, #b39150);
  color: #17191c;
  font-size: 1.5rem;
}
.phone-ripple, .phone-ripple-2 {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid var(--gold-bright);
  animation: phonePulse 2s ease-out infinite;
  pointer-events: none;
}
.phone-ripple-2 {
  animation-delay: 1s;
}
@keyframes phonePulse {
  0% { transform: scale(0.9); opacity: 0.9; }
  100% { transform: scale(1.6); opacity: 0; }
}
.float-tooltip {
  position: absolute;
  right: 58px;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: var(--r-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px);
  transition: all .2s;
  pointer-events: none;
  box-shadow: var(--shadow-2);
}
.float-tooltip::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -4px;
  transform: translateY(-50%);
  border-width: 4px 0 4px 5px;
  border-style: solid;
  border-color: transparent transparent transparent var(--primary);
}
.floating-btn:hover .float-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 820px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { background: var(--surface-bright); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 18px 22px; font-family: var(--font-display); font-weight: 600; font-size: 1rem;
  color: var(--on-surface); text-align: left; transition: color .2s;
}
.faq-question i { transition: transform .3s; color: var(--gold); font-size: 1.3rem; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-item.open .faq-question { color: var(--gold-deep); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-answer p { padding: 0 22px 20px; color: var(--on-surface-variant); font-size: .94rem; }
.faq-item.open .faq-answer { max-height: 320px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--primary); color: rgba(255,255,255,.75); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding: 64px 0 48px; }
.footer-brand p { margin: 18px 0 22px; font-size: .92rem; }
.footer-grid .brand .brand-text strong { color: #fff; }
.footer-col h4 { color: var(--gold-bright); font-size: .95rem; margin-bottom: 20px; letter-spacing: .03em; }
.footer-col ul { display: grid; gap: 12px; }
.footer-col ul a { font-size: .92rem; transition: color .2s, padding-left .2s; }
.footer-col ul a:hover { color: var(--gold-bright); padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; font-size: .92rem; }
.footer-contact li a { word-break: break-word; }
.footer-contact i { color: var(--gold); font-size: 1.1rem; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 20px 0; }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; font-size: .86rem; }
.footer-links { display: flex; gap: 18px; }
.footer-links a:hover { color: var(--gold-bright); }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,12,14,.92); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: all .3s;
}
.lightbox.open { opacity: 1; visibility: visible; }
.lightbox-content { max-width: 88vw; max-height: 86vh; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.lightbox-content img { max-width: 88vw; max-height: 76vh; object-fit: contain; border-radius: var(--r-lg); box-shadow: var(--shadow-3); }
.lightbox-content figcaption { color: #fff; font-size: .95rem; }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute; color: #fff; font-size: 2.2rem;
  width: 48px; height: 48px; display: grid; place-items: center;
  background: rgba(255,255,255,.1); border-radius: 50%; transition: background .2s;
}
.lightbox-close { top: 24px; right: 24px; }
.lightbox-prev { left: 24px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 24px; top: 50%; transform: translateY(-50%); }
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,.25); }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 150;
  width: 46px; height: 46px; border-radius: var(--r-lg);
  background: var(--primary); color: var(--gold-bright); font-size: 1.5rem;
  display: grid; place-items: center; box-shadow: var(--shadow-2);
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: all .3s;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--primary-container); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 90px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--primary); color: #fff; padding: 14px 24px; border-radius: var(--r-lg);
  box-shadow: var(--shadow-3); z-index: 300; opacity: 0; visibility: hidden; transition: all .3s;
  display: flex; align-items: center; gap: 10px; max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--error); }
.toast i { color: var(--gold-bright); font-size: 1.3rem; }

/* ---------- Preloader ---------- */
#preloader {
  position: fixed; inset: 0; z-index: 999;
  background: var(--primary); display: grid; place-items: center;
  transition: opacity .5s, visibility .5s;
}
#preloader.hidden { opacity: 0; visibility: hidden; }
.loader-mark {
  font-family: var(--font-display); font-weight: 800; font-size: 2.4rem;
  color: var(--gold-bright); letter-spacing: .1em;
  animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .4; } }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view { opacity: 1; transform: none; }

/* Stagger nhẹ khi các card hiện lên */
.product-grid .reveal:nth-child(2),
.features-grid .reveal:nth-child(2),
.project-grid .reveal:nth-child(2),
.process-grid .reveal:nth-child(2) { transition-delay: .08s; }
.product-grid .reveal:nth-child(3),
.features-grid .reveal:nth-child(3),
.project-grid .reveal:nth-child(3),
.process-grid .reveal:nth-child(3) { transition-delay: .16s; }
.product-grid .reveal:nth-child(4),
.features-grid .reveal:nth-child(4),
.project-grid .reveal:nth-child(4),
.process-grid .reveal:nth-child(4) { transition-delay: .08s; }
.product-grid .reveal:nth-child(5),
.features-grid .reveal:nth-child(5),
.project-grid .reveal:nth-child(5),
.process-grid .reveal:nth-child(5) { transition-delay: .16s; }
.product-grid .reveal:nth-child(6),
.features-grid .reveal:nth-child(6),
.project-grid .reveal:nth-child(6),
.process-grid .reveal:nth-child(6) { transition-delay: .24s; }

/* ---------- Hero entrance ---------- */
body.ready .hero .reveal { animation: heroUp .85s cubic-bezier(.22, 1, .36, 1) both; }
body.ready .hero .eyebrow { animation-delay: .15s; }
body.ready .hero h1 { animation-delay: .3s; }
body.ready .hero .hero-desc { animation-delay: .45s; }
body.ready .hero .hero-cta { animation-delay: .6s; }
body.ready .hero .hero-stats { animation-delay: .8s; }
@keyframes heroUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .product-grid, .project-grid, .features-grid { grid-template-columns: repeat(2, 1fr); }
  .calc-wrapper { grid-template-columns: 1fr; }
  .calc-options-grid { grid-template-columns: repeat(3, 1fr); }
  .process-grid { grid-template-columns: repeat(3, 1fr); row-gap: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-badge { left: 12px; bottom: -18px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .spec-modal-body { grid-template-columns: 1fr; }
  .spec-modal-dialog { padding: 24px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .calc-wrapper { padding: 24px 18px; }
  .calc-options-grid { grid-template-columns: repeat(2, 1fr); }
  .calc-step-group { grid-template-columns: 1fr; }
  .calc-area-control { flex-direction: column; align-items: stretch; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 0; right: -100%; width: min(320px, 82vw);
    height: 100vh; background: var(--primary); z-index: 95;
    transition: right .35s ease; padding: 96px 24px 24px;
  }
  .main-nav.open { right: 0; }
  .main-nav ul { flex-direction: column; gap: 8px; }
  .main-nav .nav-link { color: rgba(255,255,255,.9) !important; }
  .main-nav .nav-link.active { color: var(--gold-bright) !important; }
  .main-nav .nav-link.active::after { display: none; }
  .header-actions .btn-accent, .hotline span { display: none; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .stat-num { font-size: 1.7rem; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .cta-inner { justify-content: center; text-align: center; }
  .cta-actions { justify-content: center; }
  .footer-bottom-inner { justify-content: center; text-align: center; }
  .floating-widget { right: 16px; bottom: 80px; }
  .back-to-top { right: 16px; bottom: 20px; }
  .float-tooltip { display: none; }
}

@media (max-width: 560px) {
  .product-grid, .project-grid, .features-grid { grid-template-columns: 1fr; }
  .calc-options-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .brand-strip-inner { justify-content: center; text-align: center; }
  .hero h1 { font-size: 2.1rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { transition: none; opacity: 1; transform: none; }
  body.ready .hero .reveal { animation: none; opacity: 1; transform: none; }
  .btn::after { display: none; }
}