/* ErCAD — procedural CAD workspace background (SVG layers) */

.cad-bg-wash {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: var(--cad-bg, #0c1016);
}

/* Сетка — отдельный fixed-слой на body (не внутри листа со contain) */
.cad-bg-grid-host {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.cad-bg-grid-host .cad-bg__layer--grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
}

/* Картинки — fixed на экране, скроллится только контент */
.cad-bg-motifs-host {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  /* clip to viewport — без горизонтального скролла страницы */
  overflow: hidden;
}

.cad-bg-motifs-host .cad-bg__layer--motifs {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.26;
  overflow: visible;
}

/*
 * Лист деталей: база 1920×1080 CSS px по центру.
 * На больших экранах можно увеличить (не меньше 1×) — на узких не уменьшаем.
 */
.cad-bg-motifs-host .cad-bg__svg--motifs {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1920px !important;
  height: 1080px !important;
  max-width: none !important;
  max-height: none !important;
  transform: translate(-50%, -50%);
  transform-origin: center center;
  overflow: visible;
  display: block;
}

.cad-bg {
  --cad-bg: #0c1016;
  --cad-line: #5a9fd4;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: var(--cad-sheet-h, 100vh);
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background: transparent;
}

.cad-bg__layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  will-change: auto;
  transform: none;
  backface-visibility: hidden;
}

.cad-bg__svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.cad-bg__svg * {
  vector-effect: non-scaling-stroke;
}

/* Decorative object layers (empty until new assets) */
.cad-bg__layer--geometry { opacity: 0.085; }
.cad-bg__layer--motifs { opacity: 0.26; }
.cad-bg__layer--dimensions { opacity: 0.1; }
.cad-bg__layer--points { opacity: 0.04; }

/* оси поверх контента; Y и X — fixed */
.cad-rulers {
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 0;
  z-index: 12;
  pointer-events: none;
}

.cad-ruler-y {
  position: fixed;
  left: 0;
  top: 0;
  overflow: hidden;
  opacity: 0.7;
  z-index: 13;
}

.cad-ruler-y__svg {
  display: block;
  overflow: visible;
}

.cad-ruler-x {
  position: fixed;
  inset: 0;
  z-index: 12;
  pointer-events: none;
  opacity: 0.7;
}

.cad-ruler-x__svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.cad-content-fade {
  position: fixed;
  left: 0;
  right: 0;
  z-index: 5;
  pointer-events: none;
}

.cad-content-fade--bottom {
  background: linear-gradient(
    to top,
    #0c1016 0%,
    rgba(12, 16, 22, 0.97) 25%,
    rgba(12, 16, 22, 0.55) 58%,
    transparent 100%
  );
}

.cad-content-fade--top {
  /* выше оси Y (z=13), ниже шапки (z=20) — прикрывает верх вертикальной оси */
  z-index: 15;
  background: linear-gradient(
    to bottom,
    #0c1016 0%,
    rgba(12, 16, 22, 0.98) 22%,
    rgba(12, 16, 22, 0.7) 52%,
    rgba(12, 16, 22, 0.25) 78%,
    transparent 100%
  );
}

.cad-x-underlay {
  position: fixed;
  left: 0;
  right: 0;
  z-index: 8;
  pointer-events: none;
  background: #0c1016;
}

/* закрывает сетку слева от оси Y (как x-underlay снизу от X) */
.cad-y-underlay {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 8;
  pointer-events: none;
  background: #0c1016;
}

.cad-ruler-axis {
  fill: none;
  stroke: var(--cad-line, #5a9fd4);
  stroke-width: 0.7;
  stroke-linecap: square;
}

.cad-ruler-tick {
  fill: none;
  stroke: var(--cad-line, #5a9fd4);
  stroke-width: 0.5;
  stroke-linecap: square;
}

.cad-ruler-tick--major {
  stroke-width: 0.65;
}

.cad-ruler-label {
  fill: var(--cad-line, #5a9fd4);
  stroke: none;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-weight: 500;
  letter-spacing: 0.02em;
  opacity: 1;
  user-select: none;
}

.cad-ruler-axis-name {
  font-weight: 700;
}

.cad-ruler-arrow {
  fill: var(--cad-line, #5a9fd4);
  stroke: none;
}

@media (max-width: 720px) {
  /* fixed underlay/fade на iOS при зуме и fast-scroll закрывают экран и «отрываются» от страницы */
  .cad-ruler-y,
  .cad-ruler-x,
  .cad-x-underlay,
  .cad-y-underlay,
  .cad-content-fade {
    display: none !important;
  }
}

.cad-bg__svg :is(path, line, circle, polygon, polyline, rect):not(.cad-grid-line) {
  fill: none;
  stroke: var(--cad-line);
  stroke-width: 0.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cad-bg__svg .cad-grid-line {
  fill: none;
  stroke-linecap: square;
  vector-effect: non-scaling-stroke;
}

.cad-bg .cad-w04,
.cad-bg .cad-w06,
.cad-bg .cad-w1 {
  stroke-width: 0.5;
  stroke: var(--cad-line);
  fill: none;
}

.cad-bg .cad-plate-hatch line {
  stroke-width: 0.5;
  opacity: 0.85;
}

.cad-bg .cad-beam {
  opacity: 0.4;
}

.cad-bg .cad-beam-img {
  opacity: 0.9;
}

.cad-bg .cad-part {
  opacity: 1;
}

.cad-bg .cad-part-img {
  opacity: 1;
}

.cad-bg .cad-dash-fine { stroke-dasharray: 2 5; }
.cad-bg .cad-centerline { stroke-dasharray: 10 4 2 4; }

.cad-bg .cad-point {
  fill: var(--cad-line);
  stroke: none;
  opacity: 0.7;
}

.cad-bg .cad-dim-text {
  fill: var(--cad-line);
  stroke: none;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.01em;
  opacity: 0.9;
  user-select: none;
}

.cad-bg.is-drawing .cad-draw {
  stroke-dasharray: var(--cad-len, 400);
  stroke-dashoffset: var(--cad-len, 400);
}

.cad-bg.is-drawn .cad-draw {
  stroke-dashoffset: 0;
  transition: stroke-dashoffset var(--cad-draw-ms, 2200ms) cubic-bezier(0.22, 0.61, 0.36, 1);
  transition-delay: var(--cad-delay, 0ms);
}

.cad-bg.is-drawing .cad-point,
.cad-bg.is-drawing .cad-fade {
  opacity: 0;
}

.cad-bg.is-drawn .cad-fade {
  opacity: 1;
  transition: opacity 800ms ease-out;
  transition-delay: var(--cad-delay, 400ms);
}

.cad-bg.is-drawn .cad-point {
  opacity: 0.7;
  transition: opacity 800ms ease-out;
  transition-delay: var(--cad-delay, 400ms);
}

@media (max-width: 720px) {
  .cad-bg__layer--geometry { opacity: 0.04; }
  .cad-bg__layer--motifs { opacity: 0.16; }
  .cad-bg__layer--dimensions { opacity: 0.05; }
  .cad-bg__layer--points { opacity: 0.03; }

  .cad-bg .cad-dim-text {
    font-size: 8px;
    font-weight: 400;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cad-bg.is-drawing .cad-draw,
  .cad-bg.is-drawn .cad-draw {
    stroke-dasharray: none;
    stroke-dashoffset: 0;
    transition: none;
  }

  .cad-bg.is-drawing .cad-point,
  .cad-bg.is-drawing .cad-fade,
  .cad-bg.is-drawn .cad-point,
  .cad-bg.is-drawn .cad-fade {
    opacity: 0.7;
    transition: none;
  }

  .cad-bg.is-drawn .cad-fade {
    opacity: 1;
  }
}

body.cad-bg-ready > .header {
  z-index: 20;
}

body.cad-bg-ready > main {
  position: relative;
  z-index: 1;
}

/* текст футера выше underlay/осей-хоста (z=12), фон футера прозрачный — ось просвечивает */
body.cad-bg-ready > #site-footer {
  position: relative;
  z-index: 14;
}

body.cad-bg-ready > .media-lightbox {
  position: fixed;
  z-index: 1200;
}

body.cad-bg-ready {
  background-color: transparent;
  background-image: none;
}

body.cad-bg-ready.page-home {
  background-color: transparent;
  background-image: none;
}

/* Временный режим ручной расстановки фона: приглушаем контент,
   чтобы детали были видны под блоками текста. */
body.cad-bg-edit .header,
body.cad-bg-edit main,
body.cad-bg-edit #site-footer {
  opacity: 0.38;
}

/* Рамки популярных разрешений (только ?bgEdit=1) */
.cad-bg-viewport-guides {
  position: fixed;
  inset: 0;
  z-index: 9997;
  pointer-events: none;
  overflow: hidden;
}

.cad-bg-viewport-guides[hidden] {
  display: none !important;
}

.cad-bg-vp-frame {
  position: absolute;
  box-sizing: border-box;
  border: 1px dashed rgba(90, 159, 212, 0.45);
  background: transparent;
}

.cad-bg-vp-frame--ref {
  border: 2px solid rgba(255, 196, 72, 0.85);
  box-shadow: 0 0 0 1px rgba(255, 196, 72, 0.2) inset;
}

.cad-bg-vp-frame--sheet {
  border: 2px solid rgba(120, 220, 160, 0.9);
  background: rgba(120, 220, 160, 0.04);
}

.cad-bg-vp-frame--wide {
  border-color: rgba(180, 140, 255, 0.55);
}

.cad-bg-vp-frame__label {
  position: absolute;
  left: 6px;
  top: 4px;
  padding: 2px 6px;
  border-radius: 4px;
  font: 600 11px/1.3 "Segoe UI", Helvetica, Arial, sans-serif;
  color: #e8f4ff;
  background: rgba(12, 16, 22, 0.82);
  white-space: nowrap;
  pointer-events: none;
}

.cad-bg-vp-frame--ref .cad-bg-vp-frame__label {
  color: #ffe9b0;
}

.cad-bg-vp-frame--sheet .cad-bg-vp-frame__label {
  color: #c8f5d8;
}