/* ===== БАЗАЛЬТ — 3D-стройка дома по прокрутке (секция #house3d) ===== */
.h3d{--h3d-len:480vh;--h3d-top:104px;position:relative;z-index:1;height:var(--h3d-len);background:#101114;color:var(--txt,#f1efe9)}
.h3d-stick{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;isolation:isolate}
.h3d-cv{position:absolute;inset:0;width:100%;height:100%;display:block;z-index:0;opacity:0;transition:opacity 1s ease}
.h3d.h3d--ready .h3d-cv{opacity:1}
.h3d-fb{position:absolute;inset:0;z-index:0;display:none}
.h3d-fb img{width:100%;height:100%;object-fit:cover}
.h3d-vig{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(90deg,rgba(12,13,15,.72) 0%,rgba(12,13,15,.28) 30%,rgba(12,13,15,0) 52%),
             linear-gradient(0deg,rgba(12,13,15,.6) 0%,rgba(12,13,15,0) 34%),
             linear-gradient(180deg,rgba(12,13,15,.45) 0%,rgba(12,13,15,0) 22%)}

/* перекрестья по углам кадра */
.h3d-x{position:absolute;width:17px;height:17px;z-index:2;pointer-events:none;color:var(--or,#ff5b14)}
.h3d-x::before,.h3d-x::after{content:"";position:absolute;background:currentColor}
.h3d-x::before{left:8px;top:0;width:1px;height:100%}
.h3d-x::after{top:8px;left:0;height:1px;width:100%}
.h3d-x.tl{left:calc(var(--pad,40px) - 8px);top:calc(var(--h3d-top) - 22px)}
.h3d-x.tr{right:calc(var(--pad,40px) - 8px);top:calc(var(--h3d-top) - 22px)}
.h3d-x.bl{left:calc(var(--pad,40px) - 8px);bottom:22px}
.h3d-x.br{right:calc(var(--pad,40px) - 8px);bottom:22px}

/* подпись секции */
.h3d-top{position:absolute;z-index:3;left:var(--pad,40px);right:var(--pad,40px);top:var(--h3d-top);display:flex;justify-content:space-between;align-items:center;gap:20px;color:var(--mut,#8f8d87);pointer-events:none}
.h3d-lbl{margin:0;font:inherit;display:flex;align-items:center;gap:14px;color:var(--txt,#f1efe9)}
.h3d-lbl::before{content:"";width:10px;height:10px;background:var(--or,#ff5b14);flex:none}
.h3d-lbl b{font-weight:500;color:var(--or,#ff5b14)}
.h3d-sheet{display:none}

/* HUD */
.h3d-hud{position:absolute;z-index:3;right:var(--pad,40px);bottom:clamp(40px,8vh,90px);width:250px;padding:14px 16px 12px;border:1px solid rgba(255,255,255,.14);background:rgba(15,16,18,.78);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);font-size:10.5px;letter-spacing:.08em;color:var(--mut,#8f8d87);pointer-events:none;display:grid;gap:9px}
.h3d-hud::before,.h3d-hud::after{content:"";position:absolute;width:7px;height:7px;border:1px solid var(--or,#ff5b14)}
.h3d-hud::before{left:-4px;top:-4px;border-right:0;border-bottom:0}
.h3d-hud::after{right:-4px;bottom:-4px;border-left:0;border-top:0}
.h3d-hud-row{display:flex;justify-content:space-between;gap:10px;white-space:nowrap}
.h3d-hud b{font-weight:400;color:var(--txt,#f1efe9)}
.h3d-pct{font-size:10.5px}
.h3d-pct b{font-family:var(--f-d,sans-serif);font-weight:600;font-size:26px;letter-spacing:-.02em;line-height:.8;color:var(--txt,#f1efe9);margin-right:2px}
.h3d-hud-row:first-child{align-items:flex-end}
.h3d-bar{height:2px;background:rgba(255,255,255,.12);position:relative;overflow:hidden}
.h3d-bar i{position:absolute;inset:0;background:var(--or,#ff5b14);transform-origin:left;transform:scaleX(0)}
.h3d-steps{display:grid;grid-template-columns:repeat(6,1fr);gap:4px}
.h3d-steps i{font-style:normal;text-align:center;padding:5px 0 4px;border:1px solid rgba(255,255,255,.14);color:var(--mut,#8f8d87);transition:background .4s,color .4s,border-color .4s}
.h3d-steps i.is-past{color:var(--txt,#f1efe9);border-color:rgba(255,255,255,.3)}
.h3d-steps i.is-on{background:var(--or,#ff5b14);border-color:var(--or,#ff5b14);color:#fff}
.h3d-coords{color:rgba(143,141,135,.85)}

/* подписи этапов */
.h3d-list{list-style:none;margin:0;padding:0}
.h3d-cap{position:absolute;z-index:3;left:var(--pad,40px);bottom:clamp(40px,8vh,90px);width:min(560px,44vw);opacity:0;visibility:hidden;transform:translateY(28px);transition:opacity .55s var(--ease,ease),transform .8s var(--ease,ease),visibility 0s linear .6s;pointer-events:none}
.h3d-cap.on{opacity:1;visibility:visible;transform:none;transition:opacity .7s var(--ease,ease) .08s,transform .9s var(--ease,ease) .08s,visibility 0s;pointer-events:auto}
.h3d-cap.out{transform:translateY(-22px)}
.h3d-num{display:block;font-family:var(--f-d,sans-serif);font-weight:600;font-size:clamp(64px,8.4vw,132px);line-height:.8;letter-spacing:-.04em;color:transparent;-webkit-text-stroke:1px rgba(255,91,20,.9);margin-bottom:18px}
.h3d-cap .h-m,.h3d-cap .h-l{margin-bottom:14px;color:var(--txt,#f1efe9)}
.h3d-cap .h-l{font-size:clamp(30px,4vw,64px)}
.h3d-meta{display:flex;align-items:center;gap:12px;color:var(--or,#ff5b14);margin:0 0 12px}
.h3d-meta::before{content:"";width:34px;height:1px;background:currentColor;flex:none}
.h3d-txt{color:rgba(241,239,233,.74);font-size:16px;line-height:1.55;max-width:44ch;margin:0}
.h3d-fin .btn{margin-top:26px}

/* выноски, привязанные к 3D-точкам */
.h3d-calls{position:absolute;inset:0;z-index:2;pointer-events:none}
.h3d-call{position:absolute;left:0;top:0;display:flex;align-items:center;gap:10px;font-family:var(--f-m,monospace);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--txt,#f1efe9);white-space:nowrap;opacity:0;transition:opacity .5s ease;will-change:transform}
.h3d-call.on{opacity:1}
.h3d-call i{width:9px;height:9px;border-radius:50%;background:var(--or,#ff5b14);box-shadow:0 0 0 5px rgba(255,91,20,.25);flex:none;margin-left:-4.5px}
.h3d-call .cl{width:56px;height:1px;background:rgba(255,255,255,.65);flex:none}
.h3d-call span:not(.cl){background:rgba(15,16,18,.6);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);padding:6px 10px;border:1px solid rgba(255,255,255,.12)}
.h3d-call.l{flex-direction:row-reverse;transform-origin:right}
.h3d-call.l i{margin:0 -4.5px 0 0}

/* подсказка прокрутки */
.h3d-hint{position:absolute;z-index:3;left:50%;transform:translateX(-50%);bottom:28px;display:flex;align-items:center;gap:12px;color:var(--mut,#8f8d87);transition:opacity .5s}
.h3d-hint .bar{width:1px;height:38px;background:rgba(255,255,255,.2);position:relative;overflow:hidden}
.h3d-hint .bar::after{content:"";position:absolute;left:0;top:-40%;width:1px;height:40%;background:var(--or,#ff5b14);animation:h3dHint 1.8s cubic-bezier(.76,0,.24,1) infinite}
.h3d-hint.off{opacity:0}
@keyframes h3dHint{to{top:100%}}

@media (min-width:1200px){.h3d-sheet{display:inline}}
@media (max-width:1100px){.h3d-cap{width:min(520px,60vw)}}
@media (max-width:820px){.h3d{--h3d-top:86px}}

/* мобильные */
@media (max-width:700px){
  .h3d{--h3d-len:350vh}
  .h3d-vig{background:linear-gradient(0deg,rgba(12,13,15,.9) 0%,rgba(12,13,15,.55) 30%,rgba(12,13,15,0) 52%),linear-gradient(180deg,rgba(12,13,15,.55) 0%,rgba(12,13,15,0) 26%)}
  .h3d-top{font-size:10.5px}
  .h3d-hud{left:var(--pad);right:var(--pad);width:auto;bottom:auto;top:calc(var(--h3d-top) + 28px);padding:10px 12px;gap:7px;grid-template-columns:auto 1fr;align-items:center;column-gap:14px;font-size:9.5px}
  .h3d-hud>.h3d-hud-row:first-child{grid-row:span 2}
  .h3d-hud .h3d-bar{grid-column:2;align-self:end}
  .h3d-hud .h3d-steps{grid-column:2}
  .h3d-hud>.h3d-hud-row:nth-child(4),.h3d-hud .h3d-coords{display:none}
  .h3d-pct b{font-size:22px}
  .h3d-hud-row:first-child span:first-child{display:none}
  .h3d-steps i{padding:3px 0 2px}
  .h3d-cap{left:var(--pad);right:var(--pad);width:auto;bottom:26px}
  .h3d-num{font-size:48px;margin-bottom:10px}
  .h3d-cap .h-m{font-size:24px;margin-bottom:10px}
  .h3d-cap .h-l{font-size:28px}
  .h3d-meta{font-size:10.5px;margin-bottom:8px}
  .h3d-meta::before{width:20px}
  .h3d-txt{font-size:14px;line-height:1.5}
  .h3d-fin .btn{--h:52px;margin-top:16px;font-size:14px;padding:0 22px}
  .h3d-call{font-size:9.5px}
  .h3d-call .cl{width:26px}
  .h3d-hint{display:none}
  .h3d-x.bl,.h3d-x.br{display:none}
}

/* без анимаций: сразу готовый дом, секция в один экран */
.h3d.h3d--rm{--h3d-len:auto}
.h3d.h3d--rm .h3d-stick{position:relative}
.h3d.h3d--rm .h3d-hint{display:none}

/* нет WebGL: картинка + этапы списком */
.h3d.h3d--fb{--h3d-len:auto}
.h3d.h3d--fb .h3d-stick{position:relative;height:auto;min-height:100vh;padding:calc(var(--h3d-top) + 60px) var(--pad,40px) 60px}
.h3d.h3d--fb .h3d-cv,.h3d.h3d--fb .h3d-hud,.h3d.h3d--fb .h3d-hint,.h3d.h3d--fb .h3d-calls{display:none}
.h3d.h3d--fb .h3d-fb{display:block}
.h3d.h3d--fb .h3d-fb img{filter:brightness(.42)}
.h3d.h3d--fb .h3d-vig{background:linear-gradient(90deg,rgba(12,13,15,.8),rgba(12,13,15,.2))}
.h3d.h3d--fb .h3d-list{position:relative;z-index:3;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:36px 40px;max-width:var(--maxw,1600px)}
.h3d.h3d--fb .h3d-cap{position:static;width:auto;opacity:1;visibility:visible;transform:none;pointer-events:auto;border-top:1px solid rgba(255,255,255,.18);padding-top:20px}
.h3d.h3d--fb .h3d-num{font-size:52px;margin-bottom:12px}
.h3d.h3d--fb .h3d-cap .h-l{font-size:clamp(24px,2.4vw,38px)}