/* Screen-reader-only helper */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =====================================================================
   SERVICE CATALOG (homepage) + SERVICE DETAIL PAGES
   Premium cinematic — red / black / warm white
   ===================================================================== */

/* ---------- Homepage: Danh sách dịch vụ ---------- */
.service-catalog-section {
  position: relative;
  overflow: hidden;
  background: var(--color-black);
}

.service-catalog-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(122, 31, 43, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(90, 22, 32, 0.14), transparent 50%);
  pointer-events: none;
}

.service-visual-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1.15rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .service-visual-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .service-visual-grid {
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(200px, 220px);
    gap: 1.25rem;
  }

  .service-visual-card:nth-child(1) {
    grid-column: 1 / span 2;
    grid-row: 1 / span 2;
    min-height: 100%;
  }

  .service-visual-card:nth-child(2) { grid-column: 3 / span 2; grid-row: 1; }
  .service-visual-card:nth-child(3) { grid-column: 3 / span 2; grid-row: 2; }
  .service-visual-card:nth-child(4) { grid-column: 1 / span 2; grid-row: 3; }
  .service-visual-card:nth-child(5) { grid-column: 3 / span 2; grid-row: 3; }
  .service-visual-card:nth-child(6) { grid-column: 1 / span 2; grid-row: 4; }
  .service-visual-card:nth-child(7) { grid-column: 3 / span 2; grid-row: 4; }
  .service-visual-card:nth-child(8) { grid-column: 1 / span 2; grid-row: 5; }
  .service-visual-card:nth-child(9) { grid-column: 3 / span 2; grid-row: 5; }
}

.service-visual-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 280px;
  padding: 1.5rem 1.45rem 1.35rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: var(--color-white-warm);
  border: 1px solid var(--glass-border);
  background-color: var(--color-black-3);
  transition:
    transform 0.55s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.45s ease,
    border-color 0.35s ease;
  isolation: isolate;
}

.service-visual-card:focus-visible {
  outline: 2px solid var(--color-red-bright);
  outline-offset: 4px;
}

.service-visual-card__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
  transition: transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 0;
}

.service-visual-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    165deg,
    rgba(15, 15, 16, 0.15) 0%,
    rgba(15, 15, 16, 0.55) 38%,
    rgba(15, 15, 16, 0.94) 100%
  );
  z-index: 1;
  transition: background 0.45s ease;
}

.service-visual-card__glow {
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  opacity: 0;
  background: radial-gradient(
    ellipse 90% 70% at 50% 100%,
    rgba(155, 35, 53, 0.55) 0%,
    transparent 65%
  );
  z-index: 2;
  pointer-events: none;
  transition: opacity 0.45s ease;
}

.service-visual-card:hover,
.service-visual-card:focus-visible {
  transform: scale(1.025);
  box-shadow:
    var(--shadow-lg),
    0 0 0 1px rgba(155, 35, 53, 0.25),
    0 0 48px rgba(122, 31, 43, 0.38);
  border-color: rgba(155, 35, 53, 0.45);
}

.service-visual-card:hover .service-visual-card__bg,
.service-visual-card:focus-visible .service-visual-card__bg {
  transform: scale(1.1);
}

.service-visual-card:hover .service-visual-card__glow,
.service-visual-card:focus-visible .service-visual-card__glow {
  opacity: 1;
}

.service-visual-card:hover .service-visual-card__overlay,
.service-visual-card:focus-visible .service-visual-card__overlay {
  background: linear-gradient(
    165deg,
    rgba(90, 22, 32, 0.22) 0%,
    rgba(15, 15, 16, 0.62) 42%,
    rgba(15, 15, 16, 0.96) 100%
  );
}

.service-visual-card__glass {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.service-visual-card__icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border-strong);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: var(--color-red-soft);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.service-visual-card__icon svg {
  width: 26px;
  height: 26px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
}

.service-visual-card__text {
  flex: 1;
  min-width: 0;
}

.service-visual-card__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-white-warm);
}

.service-visual-card__sub {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.5;
  color: var(--color-white-dim);
  max-width: 42ch;
}

.service-visual-card__chevron {
  align-self: center;
  opacity: 0.55;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.service-visual-card:hover .service-visual-card__chevron,
.service-visual-card:focus-visible .service-visual-card__chevron {
  opacity: 1;
  transform: translateX(4px);
}

/* ---------- Service detail: page shell ---------- */
.srv-page {
  padding-top: 0;
  background: var(--color-black);
}

/* Shared content column — headings, copy, gallery share one edge */
.srv-page article > .srv-glance,
.srv-page article > .srv-gallery-section,
.srv-page article > .srv-section,
.srv-page article > .srv-more,
.srv-page article > .srv-cta {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  box-sizing: border-box;
}

.srv-hero {
  position: relative;
  min-height: min(36vh, 320px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(5rem, 10vw, 6.5rem) var(--space-md) var(--space-lg);
  overflow: hidden;
}

.srv-hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.srv-hero__tint {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15, 15, 16, 0.35) 0%, rgba(15, 15, 16, 0.55) 40%, rgba(15, 15, 16, 0.92) 100%),
    linear-gradient(120deg, rgba(90, 22, 32, 0.45) 0%, transparent 55%),
    rgba(15, 15, 16, 0.5);
  z-index: 1;
}

.srv-hero__content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.srv-breadcrumb {
  margin: 0 0 1rem;
  font-size: var(--fs-sm);
  color: var(--color-white-dim);
}

.srv-breadcrumb a {
  color: var(--color-white-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}

.srv-breadcrumb a:hover {
  color: var(--color-white-warm);
}

.srv-breadcrumb span[aria-current="page"] {
  color: var(--color-red-soft);
}

.srv-hero h1 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 4.5vw, 3.15rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--color-white-warm);
}

.srv-hero__lede {
  margin: 0;
  max-width: 52ch;
  font-size: var(--fs-sm);
  color: var(--color-white-dim);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- At-a-glance (below hero) ---------- */
.srv-glance {
  position: relative;
  z-index: 3;
  max-width: 1200px;
  margin: -1.25rem auto 0;
  padding: 0 var(--space-md);
}

.srv-glance-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .srv-glance-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.srv-glance-card {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(22, 22, 24, 0.92);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.srv-glance-card__icon {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-red-soft);
}

.srv-glance-card strong {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-white-warm);
  margin-bottom: 0.2rem;
}

.srv-glance-card p {
  margin: 0;
  font-size: var(--fs-xs);
  color: var(--color-white-dim);
  line-height: 1.45;
}

/* ---------- Collapsible long copy ---------- */
.srv-more {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md) var(--space-lg);
}

.srv-more summary {
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-red-soft);
  padding: 0.75rem 0;
  border-top: 1px solid var(--glass-border);
}

.srv-more summary::-webkit-details-marker {
  display: none;
}

.srv-more summary::after {
  content: " ▾";
  opacity: 0.7;
}

.srv-more[open] summary::after {
  content: " ▴";
}

.srv-more__body {
  padding-bottom: var(--space-md);
}

.srv-more__body h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--color-white-warm);
}

.srv-more__body p {
  margin: 0 0 0.85rem;
  color: var(--color-white-dim);
  line-height: 1.7;
  font-size: var(--fs-sm);
}

.srv-section--tight {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

.srv-section-head--compact {
  margin-bottom: var(--space-md);
}

.srv-section-head--compact h2 {
  margin-bottom: 0;
}

/* ---------- Intro + split ---------- */
.srv-section {
  padding: var(--space-xl) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
}

.srv-section--alt {
  background:
    linear-gradient(180deg, var(--color-black) 0%, var(--color-black-2) 50%, var(--color-black) 100%);
}

.srv-section-head {
  margin-bottom: var(--space-lg);
}

.srv-section-eyebrow {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-red-soft);
  margin-bottom: 0.65rem;
}

.srv-section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  color: var(--color-white-warm);
}

.srv-section-lede {
  margin: 0;
  max-width: 62ch;
  color: var(--color-white-dim);
  line-height: 1.7;
}

.srv-intro-grid {
  display: grid;
  gap: var(--space-lg);
  align-items: start;
}

@media (min-width: 900px) {
  .srv-intro-grid {
    grid-template-columns: 1.15fr 1fr;
  }
}

.srv-intro-body h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--color-white-warm);
}

.srv-intro-body p {
  margin: 0 0 1rem;
  color: var(--color-white-dim);
  line-height: 1.75;
}

.srv-benefits {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.srv-benefits li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
}

.srv-benefits svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-red-soft);
}

/* ---------- Features grid ---------- */
.srv-features-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .srv-features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .srv-features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.srv-feature-card {
  padding: 1.35rem 1.25rem;
  border-radius: var(--radius-md);
  background: var(--color-black-3);
  border: 1px solid var(--glass-border);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.35s ease;
}

.srv-feature-card:hover {
  border-color: rgba(155, 35, 53, 0.35);
  box-shadow: var(--shadow-card), 0 0 36px rgba(122, 31, 43, 0.2);
  transform: translateY(-3px);
}

.srv-feature-card__icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  margin-bottom: 0.85rem;
  border-radius: var(--radius-sm);
  background: rgba(122, 31, 43, 0.22);
  color: var(--color-red-soft);
}

.srv-feature-card__icon svg {
  width: 22px;
  height: 22px;
}

.srv-feature-card h3 {
  margin: 0 0 0.45rem;
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--color-white-warm);
}

.srv-feature-card p {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--color-white-dim);
  line-height: 1.65;
}

/* ---------- Portfolio gallery ---------- */
.srv-portfolio {
  padding: var(--space-xl) 0;
  background: var(--color-black);
}

.srv-portfolio .srv-section-head {
  padding: 0 var(--space-md);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.srv-gallery-wrap {
  position: relative;
  margin-top: var(--space-md);
}

.srv-gallery {
  position: relative;
}

.srv-gallery-rail {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 0.5rem var(--space-md) 1.25rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-red-deep) var(--color-black-2);
}

.srv-gallery-rail::-webkit-scrollbar {
  height: 6px;
}

.srv-gallery-rail::-webkit-scrollbar-thumb {
  background: var(--color-red-deep);
  border-radius: var(--radius-pill);
}

.srv-gallery-item {
  flex: 0 0 min(85vw, 420px);
  scroll-snap-align: start;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--color-black-3);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.srv-gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), 0 0 40px rgba(122, 31, 43, 0.25);
}

.srv-gallery-item img {
  display: block;
  width: 100%;
  height: min(52vw, 280px);
  object-fit: cover;
}

.srv-gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-border-strong);
  background: rgba(15, 15, 16, 0.75);
  backdrop-filter: blur(8px);
  color: var(--color-white-warm);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.srv-gallery-nav:hover {
  background: rgba(122, 31, 43, 0.45);
  border-color: rgba(155, 35, 53, 0.55);
}

.srv-gallery-prev { left: 0.5rem; }
.srv-gallery-next { right: 0.5rem; }

@media (max-width: 640px) {
  .srv-gallery-nav { display: none; }
}

/* ---------- Process timeline ---------- */
.srv-process-track {
  display: grid;
  gap: 0.75rem;
  margin-top: var(--space-md);
  position: relative;
}

@media (min-width: 768px) {
  .srv-process-track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    align-items: stretch;
    gap: 0.75rem;
  }
}

.srv-step {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 8.5rem;
  padding: 1.25rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  margin-bottom: 0;
}

@media (min-width: 768px) {
  .srv-step {
    height: 100%;
    min-height: 9.5rem;
  }
}

.srv-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--color-white-warm);
  background: var(--grad-red);
  margin-bottom: 0.65rem;
}

.srv-step h3 {
  margin: 0 0 0.35rem;
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--color-white-warm);
  line-height: 1.35;
}

@media (min-width: 768px) {
  .srv-step h3 {
    min-height: 2.75em;
    display: flex;
    align-items: center;
  }

  .srv-step p {
    flex: 1;
  }
}

.srv-step p {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--color-white-dim);
  line-height: 1.6;
}

/* ---------- CTA band ---------- */
.srv-cta {
  margin: var(--space-xl) auto;
  padding: var(--space-lg) var(--space-md);
  max-width: 1200px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, rgba(122, 31, 43, 0.35) 0%, rgba(15, 15, 16, 0.95) 55%),
    var(--color-black-3);
  border: 1px solid rgba(155, 35, 53, 0.35);
  box-shadow: var(--shadow-red-glow);
  text-align: center;
}

.srv-cta h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  color: var(--color-white-warm);
}

.srv-cta p {
  margin: 0 auto 1.35rem;
  max-width: 48ch;
  color: var(--color-white-dim);
  line-height: 1.65;
}

.srv-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.srv-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-sm);
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.srv-btn--primary {
  background: var(--grad-red);
  color: var(--color-white-warm);
  box-shadow: var(--shadow-red);
}

.srv-btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-red-glow);
}

.srv-btn--ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-white-warm);
  border-color: var(--glass-border-strong);
}

.srv-btn--ghost:hover {
  border-color: rgba(155, 35, 53, 0.55);
  background: rgba(122, 31, 43, 0.25);
}

/* ---------- Related services ---------- */
.srv-related-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .srv-related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .srv-related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.srv-related-card {
  display: block;
  padding: 1.25rem 1.15rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  background: var(--color-black-3);
  border: 1px solid var(--glass-border);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.srv-related-card:hover {
  transform: translateY(-3px);
  border-color: rgba(155, 35, 53, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 32px rgba(122, 31, 43, 0.18);
}

.srv-related-card span {
  display: block;
  font-size: var(--fs-xs);
  color: var(--color-red-soft);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.35rem;
}

.srv-related-card strong {
  font-size: var(--fs-md);
  color: var(--color-white-warm);
}

/* Subpage header tweak when not on home */
body.srv-subpage .site-header {
  background: rgba(15, 15, 16, 0.92);
  backdrop-filter: blur(12px);
}