:root{
  --bg:#07070c;
  --ink:#f4f2f8;
  --dim:#9d9aad;
  --line:rgba(255,255,255,.10);
  --glass:rgba(20,18,28,.66);
  --rose:#ff7ab6;
  --violet:#8b5cf6;
  --ok:#34d399;
  --bad:#fb7185;
  --warn:#fbbf24;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans Sinhala","Iskoola Pota","Nirmala UI",sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--ink);font-family:var(--font)}
body{position:fixed;inset:0}

/* ---------- background aura ---------- */
#aura{position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(60vw 60vw at 18% 12%, rgba(255,122,182,.20), transparent 60%),
    radial-gradient(70vw 70vw at 88% 82%, rgba(139,92,246,.22), transparent 62%),
    linear-gradient(180deg,#0a0a12,#07070c 60%);}

/* ---------- fallback camera ---------- */
#cam{position:fixed;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;
  display:none;background:#000}
#camShade{position:fixed;inset:0;z-index:2;display:none;pointer-events:none;
  background:radial-gradient(120% 90% at 50% 60%, transparent 40%, rgba(0,0,0,.55))}
body.camera #cam,body.camera #camShade{display:block}

/* ---------- 3D / AR stage ---------- */
#stage{position:fixed;inset:0;z-index:3;transition:transform .5s cubic-bezier(.2,.9,.25,1);
  --shift:0px;
  transform:translate3d(var(--px,0px),calc(var(--py,0px) + var(--shift)),0) scale(var(--ps,1))}
/* On a phone the landing sheet covers the lower half of the screen and the auto-framed model
   is centred behind it. Do NOT shrink the canvas to the visible strip — model-viewer's "auto"
   camera framing is computed once against the full-height element, so a shorter canvas just
   overflows (~2x too large, verified). Shift the whole stage up instead: the framing stays
   correct and the model's upper half lands in the visible strip. */
@media (max-width:819px){ body.preview #stage{--shift:-20vh} }
#viewer{width:100%;height:100%;background:transparent;--poster-color:transparent;--progress-bar-color:var(--rose);
  --progress-bar-height:3px;--progress-mask:transparent}
body.camera #stage{background:transparent}
#stage model-viewer::part(default-progress-bar){display:none}

/* ---------- reticle ---------- */
#reticle{position:fixed;z-index:4;width:96px;height:96px;margin:-48px 0 0 -48px;pointer-events:none;
  opacity:0;transition:opacity .25s}
#reticle.on{opacity:1}
#reticle i{position:absolute;inset:0;border:2px solid rgba(255,255,255,.85);border-radius:50%;
  animation:ring 1.6s ease-out infinite}
#reticle i:nth-child(2){animation-delay:.55s}
#reticle i:nth-child(3){animation-delay:1.1s}
#reticle b{position:absolute;left:50%;top:50%;width:10px;height:10px;margin:-5px 0 0 -5px;border-radius:50%;
  background:#fff;box-shadow:0 0 16px rgba(255,255,255,.9)}
@keyframes ring{0%{transform:scale(.35);opacity:.95}100%{transform:scale(1.15);opacity:0}}

/* ---------- loading ---------- */
#loadbar{position:fixed;left:0;right:0;top:0;height:3px;z-index:20;background:rgba(255,255,255,.08);display:none}
#loadbar.on{display:block}
#loadfill{height:100%;width:0;background:linear-gradient(90deg,var(--rose),var(--violet));transition:width .25s}
#loadmsg{position:fixed;z-index:20;left:50%;top:14px;transform:translateX(-50%);display:none;
  padding:8px 14px;border-radius:999px;background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);font-size:12.5px;color:var(--dim);white-space:nowrap}
#loadmsg.on{display:block}

/* ---------- sheets (landing + info) ---------- */
.sheet{position:fixed;z-index:10;left:0;right:0;bottom:0;padding:22px 18px calc(22px + env(safe-area-inset-bottom));
  background:linear-gradient(180deg,rgba(12,11,20,.72),rgba(8,8,14,.97) 42%);
  border-top:1px solid var(--line);border-radius:26px 26px 0 0;backdrop-filter:blur(22px);
  max-height:86vh;overflow-y:auto;transition:transform .42s cubic-bezier(.2,.9,.25,1),opacity .3s}
.sheet.hidden{transform:translateY(115%);opacity:0;pointer-events:none}
#info{max-height:88vh}

.eyebrow{display:flex;align-items:center;gap:8px;font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--dim);margin:0 0 10px}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--rose)}
h1{margin:0;font-size:26px;line-height:1.15;letter-spacing:-.02em;font-weight:700}
h1 small{display:block;font-size:14px;font-weight:400;color:var(--dim);letter-spacing:0;margin-top:6px;line-height:1.5}

.steps{margin:16px 0 18px;padding:0;list-style:none;counter-reset:s}
.steps li{counter-increment:s;position:relative;padding:0 0 0 34px;margin:0 0 9px;font-size:13.5px;
  line-height:1.45;color:#d8d5e4}
.steps li::before{content:counter(s);position:absolute;left:0;top:.5px;width:22px;height:22px;border-radius:50%;
  background:rgba(255,255,255,.07);border:1px solid var(--line);font-size:11px;font-weight:700;
  display:flex;align-items:center;justify-content:center;color:var(--ink)}
.steps b{color:#fff;font-weight:600}

/* ---------- big tap button ---------- */
.tapwrap{position:relative;margin:4px 0 10px}
.tapwrap::after{content:"";position:absolute;inset:-6px;border-radius:999px;
  border:1.5px solid rgba(255,122,182,.55);animation:pulse 2s ease-out infinite;pointer-events:none}
@keyframes pulse{0%{transform:scale(1);opacity:.9}100%{transform:scale(1.09);opacity:0}}
.tap{width:100%;border:0;border-radius:999px;padding:19px 18px;font-size:17px;font-weight:700;
  font-family:var(--font);color:#fff;letter-spacing:.01em;cursor:pointer;
  background:linear-gradient(120deg,var(--rose),var(--violet));
  box-shadow:0 14px 38px -12px rgba(139,92,246,.85);display:flex;align-items:center;justify-content:center;gap:11px}
.tap:active{transform:scale(.975)}
.tap:disabled{opacity:.62;box-shadow:none}
.tapwrap:has(.tap:disabled)::after{display:none}
.tap .hand{width:22px;height:22px;flex:none;animation:tapin 1.6s ease-in-out infinite}
@keyframes tapin{0%,100%{transform:translateY(0)}45%{transform:translateY(3px) scale(.88)}}
.tap.alt{background:rgba(255,255,255,.07);box-shadow:none;border:1px solid var(--line);
  font-size:14.5px;font-weight:600;padding:14px}

/* ---------- status pill ---------- */
.status{display:flex;align-items:flex-start;gap:9px;margin:12px 0 0;padding:11px 13px;border-radius:14px;
  font-size:12.5px;line-height:1.45;background:rgba(255,255,255,.045);border:1px solid var(--line);color:#cfcbdd}
.status .dot{width:8px;height:8px;border-radius:50%;flex:none;margin-top:4px;background:var(--dim)}
.status.ok .dot{background:var(--ok);box-shadow:0 0 10px var(--ok)}
.status.warn .dot{background:var(--warn);box-shadow:0 0 10px var(--warn)}
.status.bad .dot{background:var(--bad);box-shadow:0 0 10px var(--bad)}

/* ---------- variant + meta rows ---------- */
.row{display:flex;gap:9px;margin:10px 0 0}
.chip{flex:1;text-align:center;padding:11px 8px;border-radius:14px;font-size:12.5px;font-weight:600;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:#cfcbdd;cursor:pointer;
  font-family:var(--font);text-decoration:none;display:block}
.chip small{display:block;font-weight:400;color:var(--dim);font-size:11px;margin-top:3px}
.chip.active{border-color:rgba(255,122,182,.75);background:rgba(255,122,182,.14);color:#fff}
.linkbtn{margin:14px auto 0;display:block;background:none;border:0;color:var(--dim);font-size:12.5px;
  text-decoration:underline;text-underline-offset:3px;cursor:pointer;font-family:var(--font)}

/* ---------- info panel ---------- */
.kv{width:100%;border-collapse:collapse;font-size:12.5px;margin:6px 0 14px}
.kv td{padding:8px 0;border-bottom:1px solid rgba(255,255,255,.07);vertical-align:top;color:#d8d5e4}
.kv td:last-child{text-align:right;font-weight:600;white-space:nowrap}
.kv .y{color:var(--ok)}.kv .n{color:var(--bad)}.kv .m{color:var(--dim)}
h2{font-size:13px;margin:16px 0 6px;letter-spacing:.02em}
.note{font-size:12.5px;line-height:1.6;color:var(--dim);margin:0 0 10px}
.note b{color:#e9e6f2}
.xbtn{position:absolute;right:14px;top:14px;width:32px;height:32px;border-radius:50%;
  background:rgba(255,255,255,.08);border:1px solid var(--line);color:#fff;font-size:16px;cursor:pointer;
  line-height:1;font-family:var(--font)}

/* ---------- camera-mode HUD ---------- */
#camhud{position:fixed;z-index:9;left:0;right:0;bottom:0;padding:16px 16px calc(16px + env(safe-area-inset-bottom));
  display:none;pointer-events:none}
body.camera #camhud{display:block}
body.camera #camhud .sheet{position:static;pointer-events:auto;padding:16px 16px 14px;border-radius:22px;
  background:linear-gradient(180deg,rgba(12,11,20,.55),rgba(8,8,14,.92))}
#camhud h3{margin:0 0 8px;font-size:14px}
#camhud p{margin:0;font-size:12.5px;color:var(--dim);line-height:1.5}
input[type=range]{width:100%;accent-color:var(--rose);margin:10px 0 2px}
.topbar{position:fixed;z-index:11;top:calc(10px + env(safe-area-inset-top));left:16px;right:16px;
  display:none;justify-content:space-between;align-items:center;gap:8px}
body.camera .topbar{display:flex}
.pill{padding:8px 13px;border-radius:999px;background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);font-size:12px;color:#e7e4f0;cursor:pointer;font-family:var(--font)}
.badge{font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--dim);
  background:var(--glass);border:1px solid var(--line);border-radius:999px;padding:8px 13px;backdrop-filter:blur(14px)}

@media (min-width:820px){
  .sheet{left:auto;right:24px;bottom:24px;width:400px;border-radius:24px;border:1px solid var(--line);
    max-height:88vh}
  h1{font-size:24px}
}