/* =============================================================
   AR Infra Consultancy — landing.css
   Home page hero: "The extruded mark on the survey plane".
   One idea: the AR monogram stands as a real 3D extrusion on a
   perspective survey plane showing a road in plan view and
   wireframe buildings. No floating cards. CSS 3D only.
   ============================================================= */

/* =============================================================
   HERO SHELL
   ============================================================= */
.hero3d {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100svh;
  overflow: hidden;
  /* Light studio backdrop: the gradient monogram reads brighter
     against a near-white plane than it did on deep violet-navy. */
  background:
    radial-gradient(ellipse 70% 50% at 75% 8%, rgba(123, 63, 160, 0.10), transparent 62%),
    radial-gradient(ellipse 60% 45% at 10% 90%, rgba(58, 123, 213, 0.10), transparent 65%),
    linear-gradient(180deg, var(--bg-page) 0%, var(--bg-alt) 100%);
  color: var(--text);
}

/* Clearance for the sticky header; hero starts under it visually */
.hero3d { padding-top: 0; }

/* =============================================================
   THE SURVEY PLANE (background)
   ============================================================= */
.plane-wrap {
  position: absolute;
  left: -18%;
  right: -18%;
  bottom: -6%;
  height: 72%;
  perspective: 1400px;
  perspective-origin: 50% 12%;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 34%, #000 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 34%, #000 100%);
}

.plane {
  position: absolute;
  inset: 0;
  transform: rotateX(62deg);
  transform-origin: 50% 100%;
  background-image:
    linear-gradient(rgba(58, 123, 213, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 123, 213, 0.18) 1px, transparent 1px);
  background-size: 72px 72px;
}

.plane-art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* =============================================================
   HERO MAIN GRID: copy left, mark centre-right
   ============================================================= */
.hero-main {
  position: relative;
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: var(--space-5);
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: calc(var(--header-h) + var(--space-6)) var(--space-4) var(--space-6);
}

.hero-copy { position: relative; z-index: 10; max-width: 34rem; }

.hero-copy .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.hero-copy .eyebrow::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--brand-gradient);
}

.hero3d .eyebrow--light { color: var(--brand-violet); }

.hero3d h1 {
  color: var(--text);
  font-size: clamp(2.5rem, 5.4vw, 4rem);
  line-height: 1.08;
  margin: 0 0 var(--space-4);
}

.hero-tagline {
  font-size: var(--fs-md);
  color: var(--text-2);
  max-width: 30rem;
  margin-bottom: var(--space-2);
}

.hero-pending {
  font-size: var(--fs-xs);
  color: var(--text-2);
  opacity: 0.75;
  margin-bottom: var(--space-5);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* =============================================================
   THE EXTRUDED MARK
   16 stacked copies of ar-mono.svg, each 3px further back on Z.
   The front copy carries the gradient; back copies are darkened
   toward --bg-dark. JS drives yaw/pitch; CSS provides the static
   pose and the no-JS/reduced-motion fallback.
   ============================================================= */
.mark-stage {
  position: relative;
  z-index: 5;
  display: grid;
  place-items: center;
  perspective: 1400px;
  min-height: 300px;
}

.mark3d {
  position: relative;
  width: clamp(240px, 34vw, 460px);
  aspect-ratio: 1600 / 900;
  transform-style: preserve-3d;
  /* Static pose: slight yaw toward the copy */
  transform: rotateX(4deg) rotateY(-8deg);
}

.mark3d.is-driven { animation: none; }

@keyframes mark-idle {
  0%, 100% { transform: rotateX(4deg) rotateY(-8deg); }
  50% { transform: rotateX(4deg) rotateY(8deg); }
}

@media (prefers-reduced-motion: no-preference) {
  .mark3d:not(.is-driven) { animation: mark-idle 9s ease-in-out infinite; }
}

.mark-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: translateZ(calc(var(--i) * -3px));
  filter: brightness(calc(1 - var(--i) * 0.042)) saturate(calc(1 - var(--i) * 0.05));
  pointer-events: none;
}

.mark-layer--front {
  /* Keep the logo colours untouched; just add a natural contact
     shadow and a touch of brightness so the mark pops on light. */
  filter: drop-shadow(0 22px 34px rgba(26, 17, 40, 0.30)) brightness(1.05);
}

/* Soft ground shadow resting on the plane */
.mark-shadow {
  position: absolute;
  left: 50%;
  bottom: -4%;
  width: 62%;
  height: 9%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(26, 17, 40, 0.30), transparent 70%);
  filter: blur(10px);
  pointer-events: none;
}

/* =============================================================
   SERVICE STRIP (docked, bottom of hero, normal flow)
   ============================================================= */
.svc-strip {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--bg-card);
  border-top: 2px solid;
  border-image: var(--brand-gradient) 1;
}

.svc-item {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: var(--space-4) var(--space-5);
  text-decoration: none;
  color: var(--text);
  border-left: 1px solid var(--border);
  transition: background-color 0.28s var(--ease);
}

.svc-item:first-child { border-left: 0; }

.svc-item:hover { background: rgba(58, 123, 213, 0.10); color: var(--text); }

.svc-item:focus-visible { outline: 2px solid var(--focus); outline-offset: -4px; }

.svc-icon {
  flex: none;
  width: 2rem;
  height: 2rem;
  color: #9EC4F0;
}

.svc-item h3 {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--text);
  margin: 0 0 0.2rem;
}

.svc-item p {
  font-size: var(--fs-sm);
  color: var(--text-2);
  margin: 0;
}

/* =============================================================
   WHAT WE BUILD: scroll-snap panels
   ============================================================= */
.wwb-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(19rem, 26rem);
  gap: var(--space-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-inline: max(var(--space-4), (100vw - var(--max-w)) / 2);
  padding-bottom: var(--space-3);
  scrollbar-width: thin;
  scrollbar-color: var(--brand-violet) var(--border);
}

.wwb-panel {
  scroll-snap-align: center;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(26, 17, 40, 0.06);
}

.wwb-media {
  position: relative;
  min-height: 11rem;
  display: grid;
  place-items: center;
  padding: var(--space-3);
  background:
    linear-gradient(rgba(31, 120, 168, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 120, 168, 0.05) 1px, transparent 1px),
    linear-gradient(135deg, #EFF0FA, #E9E4F2);
  background-size: 26px 26px, 26px 26px, auto;
}

.wwb-media::after {
  content: "";
  position: absolute;
  inset: 0.55rem;
  border: 1px dashed rgba(122, 74, 158, 0.32);
  border-radius: var(--r-sm);
  pointer-events: none;
}

.wwb-medianote {
  position: relative;
  z-index: 1;
  font-size: var(--fs-xs);
  color: var(--text-2);
  text-align: center;
  max-width: 15rem;
}

/* Filled media: real imagery replaces the drafting-grid placeholder.
   Fixed 16:10 box keeps the three panels uniform; object-fit crops
   oversized sources without distortion. */
.wwb-media--filled {
  padding: 0;
  min-height: 0;
  aspect-ratio: 16 / 10;
  background: var(--bg-deep);
}

.wwb-media--filled::after { content: none; }

.wwb-media--filled img,
.wwb-media--filled video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Small source credit so stock visuals are never presented as
   AR Infra Consultancy project work. */
.media-credit {
  position: absolute;
  right: 0.5rem;
  bottom: 0.4rem;
  z-index: 1;
  font-size: 0.65rem;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(13, 8, 32, 0.55);
  padding: 0.15rem 0.5rem;
  border-radius: var(--r-full);
}

.wwb-body { padding: var(--space-4); border-top: 2px solid; border-image: var(--brand-gradient) 1; }

.wwb-kicker {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-violet);
  margin: 0 0 var(--space-1);
}

.wwb-body h3 { margin: 0 0 var(--space-2); }

.wwb-body p { color: var(--text-2); font-size: var(--fs-sm); margin: 0; }

/* =============================================================
   HOW WE WORK: vertical timeline
   ============================================================= */
.hww-steps {
  list-style: none;
  margin: 0 0 var(--space-5);
  padding: 0;
  display: grid;
  gap: var(--space-5);
  position: relative;
}

.hww-step {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: var(--space-4);
  align-items: start;
  position: relative;
  padding-left: var(--space-4);
}

/* Timeline spine */
.hww-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.4rem;
  bottom: -0.4rem;
  width: 2px;
  background: linear-gradient(180deg, var(--brand-blue), var(--brand-violet));
  opacity: 0.35;
}

.hww-step:last-child::before { bottom: 40%; }

.hww-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3rem, 7vw, 4.5rem);
  line-height: 1;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .hww-num { background: none; color: var(--brand-blue); }
}

.hww-text h3 { margin: 0 0 var(--space-1); }

.hww-text p { color: var(--text-2); margin: 0; max-width: 38rem; }

/* =============================================================
   START A PROJECT: light closer
   ============================================================= */
.start-project {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  color: var(--text);
  border-top: 1px solid var(--border);
  padding-block: var(--space-8);
  text-align: center;
}

.start-project::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 70% at 50% 120%, rgba(122, 74, 158, 0.10), transparent 70%),
    radial-gradient(ellipse 40% 50% at 82% -10%, rgba(31, 120, 168, 0.10), transparent 70%);
  pointer-events: none;
}

.start-inner {
  position: relative;
  display: grid;
  justify-items: center;
  gap: var(--space-5);
}

.start-project h2 {
  color: var(--text);
  font-size: clamp(2rem, 4.6vw, 3.2rem);
  max-width: 18ch;
  margin: 0;
}

/* =============================================================
   ON SITE NOW: multi-slide gallery
   Native scroll-snap row; buttons scroll one slide. Slides are
   fixed 16:10 with object-fit cover, media loads lazily, and the
   ambient video only fetches/plays while its slide is on screen.
   ============================================================= */
.gallery { padding-block: var(--space-7); position: relative; }

.g-wrap { position: relative; }

.g-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(17rem, 24rem);
  gap: var(--space-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding-bottom: var(--space-3);
  scrollbar-width: thin;
  scrollbar-color: var(--brand-violet) var(--border);
}

.g-slide {
  scroll-snap-align: center;
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  box-shadow: 0 6px 24px rgba(26, 17, 40, 0.06);
  background: var(--bg-deep);
}

.g-slide img,
.g-slide video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.g-cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1.6rem 1rem 0.7rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: #FFFFFF;
  background: linear-gradient(180deg, transparent, rgba(13, 8, 32, 0.72));
  text-align: left;
}

.g-btn {
  position: absolute;
  top: 50%;
  z-index: 5;
  transform: translateY(-50%);
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--shadow-nav);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.g-btn svg { width: 1.25rem; height: 1.25rem; }
.g-btn:hover { background: var(--brand-violet); border-color: var(--brand-violet); color: #FFFFFF; }

.g-btn--prev { left: -1.375rem; }
.g-btn--next { right: -1.375rem; }

@media (max-width: 640px) {
  .g-btn--prev { left: 0.25rem; }
  .g-btn--next { right: 0.25rem; }
  .g-track { grid-auto-columns: minmax(14rem, 78vw); }
}

.start-project .hero-actions { margin: 0; justify-content: center; }

/* =============================================================
   SELECTED WORK CTA BANNER (below the 3x3 grid)
   ============================================================= */
.selected-cta {
  margin-top: var(--space-7);
  padding: var(--space-6) var(--space-5);
  border-radius: var(--r-lg);
  background: var(--brand-gradient);
  color: #FFFFFF;
  text-align: center;
  display: grid;
  justify-items: center;
  gap: var(--space-4);
}

.selected-cta h2 {
  color: #FFFFFF;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  margin: 0;
  max-width: 22ch;
}

.selected-cta .btn {
  background: #FFFFFF;
  color: var(--brand-crimson);
  border: none;
}

.selected-cta .btn:hover { opacity: 0.92; color: var(--brand-violet); }

/* =============================================================
   SERVICES PREVIEW (home page, three cards)
   ============================================================= */
.svc-preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.svc-preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--space-5) var(--space-4) var(--space-4);
  box-shadow: 0 2px 8px rgba(26, 17, 40, 0.05);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.svc-preview-card h3 { margin: 0; }

.svc-preview-card > p { color: var(--text-2); font-size: var(--fs-sm); margin: 0; }

.svc-preview-card .service-image-grid { margin-top: var(--space-2); }

.svc-preview-card > p:last-child { margin-top: auto; padding-top: var(--space-2); }

@media (max-width: 1024px) {
  .svc-preview { grid-template-columns: 1fr; }
}

/* =============================================================
   FOOTER on dark uses the shared .site-footer (styles.css).
   Home page needs no margin-top before the footer.
   ============================================================= */
.hero-page .site-footer { margin-top: 0; }

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width: 1024px) {
  .mark3d { width: clamp(220px, 40vw, 380px); }
}

@media (max-width: 768px) {
  .hero-main {
    grid-template-columns: 1fr;
    align-content: start;
    gap: var(--space-4);
    padding-top: calc(var(--header-h) + var(--space-5));
    text-align: left;
  }

  /* Mark on top, smaller */
  .mark-stage { order: -1; min-height: 0; margin-top: var(--space-4); }
  .mark3d { width: clamp(180px, 56vw, 260px); }

  /* Plane simplified: buildings removed, grid + road only */
  .plane-art .blds { display: none; }

  .svc-strip { grid-template-columns: 1fr; }

  .svc-item { border-left: 0; border-top: 1px solid rgba(240, 238, 248, 0.14); }
  .svc-item:first-child { border-top: 0; }

  .wwb-track { grid-auto-columns: minmax(16rem, 1fr); padding-inline: var(--space-4); }

  .hww-step { grid-template-columns: 3.5rem 1fr; gap: var(--space-3); }
}

@media (max-width: 640px) {
  .hero-actions .btn { width: 100%; }
}

/* =============================================================
   REDUCED MOTION: static pose, no idle yaw, no scroll transform
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .mark3d,
  .mark3d.is-driven { animation: none !important; transform: rotateX(0deg) rotateY(0deg); }

  .plane { transform: rotateX(62deg); }

  .reveal { opacity: 1 !important; transform: none !important; }
}

@media print {
  .plane-wrap,
  .mark-shadow,
  .svc-strip { display: none; }

  .hero3d,
  .start-project { background: #FFFFFF; color: var(--text); }
}