/* ============================================================
   Orange data-visualisation background
   ============================================================
   Replaces a photograph in full-width claim bands. Pure SVG + CSS —
   no canvas, no JS — so it renders identically over file:// and costs
   nothing in payload. Drop-in for .pbh-bg / .mood-bg:

     <div class="dviz" aria-hidden="true">
       <div class="dviz-grid"></div>
       <div class="dviz-bars">…24 <i> …</div>
       <svg class="dviz-line">…</svg>
     </div>
     <div class="dviz-scrim"></div>

   .dviz--deep is the darker variant.
   ============================================================ */
.dviz {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 78% 8%, rgba(239, 136, 25, .30), transparent 62%),
    radial-gradient(90% 80% at 12% 96%, rgba(255, 187, 81, .16), transparent 66%),
    linear-gradient(160deg, #2a1408 0%, #3a1a0b 34%, #24122a 78%, #1a0830 100%);
}
/* the darker variant asked for on the platform claim bands */
.dviz--deep {
  background:
    radial-gradient(120% 90% at 78% 8%, rgba(239, 136, 25, .22), transparent 60%),
    radial-gradient(90% 80% at 12% 96%, rgba(255, 187, 81, .10), transparent 64%),
    linear-gradient(160deg, #1d0e06 0%, #2a1408 36%, #1b0d20 78%, #150726 100%);
}

/* --- measurement grid --- */
.dviz-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 187, 81, .06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 187, 81, .045) 1px, transparent 1px);
  background-size: 84px 100%, 100% 64px;
  mask-image: linear-gradient(180deg, transparent, #000 22%, #000 78%, transparent);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 22%, #000 78%, transparent);
}

/* --- bar series --- */
.dviz-bars {
  position: absolute;
  left: -2%;
  right: -2%;
  bottom: 0;
  height: 44%;
  display: flex;
  align-items: flex-end;
  gap: 0.55%;
  padding: 0 2%;
  opacity: .30;
}
.dviz-bars i {
  flex: 1 1 0;
  min-width: 0;
  border-radius: 3px 3px 0 0;
  transform-origin: 50% 100%;
  background: linear-gradient(180deg, #FFBB51 0%, #EF8819 55%, rgba(239, 136, 25, .18) 100%);
  height: var(--h, 40%);
  will-change: transform;
}
@media (prefers-reduced-motion: no-preference) {
  .dviz-bars i {
    animation: dvizBar 3.6s cubic-bezier(.45, 0, .35, 1) infinite alternate;
    animation-delay: calc(var(--d, 0) * -160ms);
  }
  @keyframes dvizBar {
    from { transform: scaleY(.42); }
    to   { transform: scaleY(1); }
  }
}

/* --- trend line sweeping across the series --- */
.dviz-line {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2%;
  width: 100%;
  height: 34%;
  overflow: visible;
}
.dviz-line path {
  fill: none;
  stroke: url(#dvizStroke);
  stroke-width: 1.8;
  stroke-linecap: round;
  filter: drop-shadow(0 0 7px rgba(255, 187, 81, .40));
  opacity: .6;
}
@media (prefers-reduced-motion: no-preference) {
  .dviz-line path {
    stroke-dasharray: 1400;
    animation: dvizDraw 9s ease-in-out infinite;
  }
  @keyframes dvizDraw {
    0%       { stroke-dashoffset: 1400; }
    45%, 60% { stroke-dashoffset: 0; }
    100%     { stroke-dashoffset: -1400; }
  }
}
/* data points riding the line */
.dviz-line circle {
  fill: #FFE0A8;
  opacity: .7;
  filter: drop-shadow(0 0 6px rgba(255, 187, 81, .8));
}
@media (prefers-reduced-motion: no-preference) {
  .dviz-line circle {
    opacity: 0;
    animation: dvizDot 9s ease-in-out infinite;
    animation-delay: calc(var(--d, 0) * 220ms);
  }
  @keyframes dvizDot {
    0%, 8%   { opacity: 0; }
    22%, 62% { opacity: 1; }
    78%, 100% { opacity: 0; }
  }
}

/* --- scrim: keeps the type legible over the animation --- */
.dviz-scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(58% 70% at 50% 46%, rgba(24, 10, 8, .72), rgba(24, 10, 8, .30) 62%, transparent 82%),
    linear-gradient(180deg, rgba(18, 8, 6, .58) 0%, rgba(30, 14, 8, .34) 46%, rgba(20, 8, 30, .66) 100%);
}
.dviz-scrim--deep {
  background:
    radial-gradient(56% 68% at 50% 46%, rgba(14, 6, 5, .80), rgba(14, 6, 5, .38) 60%, transparent 82%),
    linear-gradient(180deg, rgba(12, 5, 4, .68) 0%, rgba(22, 10, 6, .46) 46%, rgba(16, 6, 26, .78) 100%);
}

/* orange photo overlay — used where the photograph stays (About) */
.pbh-scrim--orange {
  background:
    linear-gradient(180deg, rgba(38, 14, 8, .74) 0%, rgba(72, 30, 10, .46) 48%, rgba(26, 8, 32, .82) 100%),
    radial-gradient(80% 66% at 72% 34%, rgba(239, 136, 25, .42), transparent 72%) !important;
}

/* centred claim band (platform "Purpose-built") */
.dviz-center { text-align: center; }
.dviz-center .lead,
.dviz-center p { margin-left: auto; margin-right: auto; }
.dviz-center .btn-row { justify-content: center; display: flex; }

@media (prefers-reduced-motion: reduce) {
  .dviz-bars i { transform: scaleY(.8); }
}