/* ===== atomic: components split into their real layers ===== */
#atomic{--a-top:76px;padding-bottom:clamp(60px,8vw,110px)}
#atomic .atomic-head{margin-bottom:clamp(36px,5vw,64px)}

/* pinned track: tall scroll range, sticky stage */
#atomic .atomic-track{position:relative;height:360vh}
#atomic .atomic-sticky{position:sticky;top:var(--a-top);height:calc(100vh - var(--a-top));display:flex;align-items:flex-start}
#atomic .atomic-sticky>.wrap{width:100%}
#atomic .atomic-frame{margin:0;height:calc(100vh - var(--a-top) - 28px);min-height:520px;max-height:880px}
#atomic .atomic-view{position:absolute;inset:0;overflow:hidden;background-color:var(--night);
  background-image:radial-gradient(circle at 50% 50%,rgba(255,255,255,.06) 1.1px,transparent 1.7px);background-size:24px 24px;background-position:12px 12px}
#atomic .atomic-view::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 55% 60% at 46% 52%,rgba(31,140,255,.07) 0,transparent 70%),radial-gradient(ellipse 80% 80% at 50% 50%,transparent 40%,rgba(0,0,0,.35) 100%)}

/* corner readouts */
#atomic .atomic-hud{position:absolute;top:18px;z-index:3;display:flex;align-items:center;gap:8px;font:400 12px/1 var(--mono);color:#a9a59c;letter-spacing:0}
#atomic .atomic-hud-l{left:20px}
#atomic .atomic-hud-r{right:20px;color:#77746d}
#atomic .atomic-pack{color:#77746d}
#atomic .atomic-sep{color:#4a4852}
#atomic .atomic-slug{color:#f2f0eb}
#atomic .atomic-dot{width:3px;height:3px;border-radius:50%;background:#4a4852}

/* 3D scene: world origin = view center */
#atomic .atomic-scene{position:absolute;left:50%;top:50%;width:0;height:0;z-index:1}
#atomic .atomic-world{position:absolute;left:0;top:0;transform-origin:0 0;transform-style:preserve-3d;will-change:transform}
#atomic .atomic-plane{position:absolute;transform-origin:0 0}
#atomic .atomic-plane img{position:absolute;max-width:none;user-select:none;-webkit-user-drag:none}
#atomic .atomic-box{position:absolute;border:1px solid var(--sel);opacity:0;border-radius:1px}
#atomic .atomic-floor{position:absolute;border:1px dashed rgba(255,255,255,.2);border-radius:4px;opacity:0}
#atomic .atomic-sheet{position:absolute;left:0;top:0;width:100%;height:100%;border:1px solid rgba(255,255,255,.2);border-radius:3px;opacity:0;background:rgba(255,255,255,.015)}
#atomic .atomic-shade{position:absolute;inset:0;border-radius:6px;background:rgba(0,0,0,.55);filter:blur(16px);opacity:0}
#atomic .atomic-comp{position:absolute}
/* 9-slice guides on the base panel */
#atomic .atomic-9{position:absolute;opacity:0}
#atomic .atomic-9.h{left:-14px;right:-14px;height:1px;background:repeating-linear-gradient(90deg,var(--sel) 0 4px,transparent 4px 7px);transform-origin:0 50%}
#atomic .atomic-9.v{top:-14px;bottom:-14px;width:1px;background:repeating-linear-gradient(180deg,var(--sel) 0 4px,transparent 4px 7px);transform-origin:50% 0}

/* live game text (outside stroke = double-width stroke drawn behind the fill) */
.atomic-t{position:absolute;white-space:pre;font-family:var(--game);font-weight:400;letter-spacing:0}
.atomic-t>.s,.atomic-t>.f{position:absolute;inset:0;text-align:inherit;line-height:inherit}
.atomic-t>.s{-webkit-text-stroke:var(--sw) var(--sc);color:var(--sc)}
.atomic-t>.f{color:var(--fill)}
.atomic-t.grad>.f{background:var(--fill);-webkit-background-clip:text;background-clip:text;color:transparent}
#atomic .atomic-t .sel{position:absolute;inset:-1px -2px;border:1px solid var(--sel);opacity:0;border-radius:1px}

/* leader lines + anchor handles (screen space) */
#atomic .atomic-leads{position:absolute;left:50%;top:50%;width:0;height:0;z-index:2;pointer-events:none}
#atomic .atomic-lead{position:absolute;left:0;top:0;width:1px;height:1px;background:rgba(255,255,255,.34);transform-origin:0 50%;opacity:0}
#atomic .atomic-pin{position:absolute;left:-4px;top:-4px;width:9px;height:9px;border-radius:50%;background:var(--night);border:1.5px solid var(--sel);opacity:0}

/* callout labels */
#atomic .atomic-notes{list-style:none;margin:0;padding:0;position:absolute;left:50%;top:50%;width:0;height:0;z-index:3}
#atomic .atomic-note{position:absolute;left:0;top:0;width:max-content;max-width:280px;opacity:0;font:400 11.5px/1.45 var(--mono);color:#8a877f;padding-left:12px;border-left:1px solid #3a3842}
#atomic .atomic-note .n{color:var(--sel);margin-right:7px}
#atomic .atomic-note b{font-weight:500;color:#f2f0eb;font-size:12.5px}
#atomic .atomic-note .m{display:block;white-space:nowrap}
#atomic .atomic-note .x{display:block;white-space:nowrap;color:#5aa9ff}
#atomic .atomic-note .sw{display:inline-block;width:8px;height:8px;border-radius:2px;margin:0 4px 0 1px;vertical-align:-0.5px;box-shadow:0 0 0 1px rgba(255,255,255,.25) inset}

/* steps + progress */
#atomic .atomic-steps{position:absolute;left:20px;right:20px;bottom:18px;z-index:3}
#atomic .atomic-steps ol{list-style:none;margin:0 0 12px;padding:0;display:flex;gap:22px;font:400 11.5px/1 var(--mono);color:#6f6c66;counter-reset:s}
#atomic .atomic-steps li{counter-increment:s;transition:color .3s}
#atomic .atomic-steps li::before{content:"0" counter(s) " ";color:#45434c;transition:color .3s}
#atomic .atomic-steps li.on{color:#f2f0eb}
#atomic .atomic-steps li.on::before{color:var(--sel)}
#atomic .atomic-prog{display:block;height:1px;background:#2f2d37;position:relative;overflow:hidden}
#atomic .atomic-prog i{position:absolute;inset:0;background:#f2f0eb;transform-origin:0 50%;transform:scaleX(0)}

/* ---------- cards ---------- */
#atomic .atomic-below{margin-top:clamp(56px,7vw,96px)}
#atomic .atomic-cards{background:color-mix(in srgb,var(--card) 70%,transparent)}
#atomic .atomic-cards .cards{border-top:0}
#atomic .card .body{max-width:440px}

/* card 1: component grid with child outlines */
#atomic .atomic-grid-box{display:flex;flex-direction:column}
#atomic .atomic-grid{flex:1;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:1fr 1fr;gap:1px;background:var(--line);min-height:0}
#atomic .atomic-cell{position:relative;background:var(--bg2);display:flex;align-items:center;justify-content:center;padding:12%;min-width:0;min-height:0;cursor:default}
#atomic .atomic-cell svg{width:100%;height:100%;overflow:visible;transition:opacity .35s var(--ease),transform .5s var(--ease)}
#atomic .atomic-cell .bx{fill:var(--sel-soft);stroke:var(--sel);stroke-width:1;vector-effect:non-scaling-stroke;opacity:0;transition:opacity .25s var(--ease)}
#atomic .atomic-cell .bx.full{fill:none}
#atomic .atomic-cell .art{transition:opacity .35s var(--ease)}
#atomic .atomic-grid.has-on .atomic-cell:not(.on) svg{opacity:.38}
#atomic .atomic-cell.on svg{transform:scale(1.04)}
#atomic .atomic-cell.on .art{opacity:.55}
#atomic .atomic-cell.on .bx{opacity:1;transition-delay:calc(var(--i) * 60ms)}
#atomic .atomic-cell:focus-visible{outline-offset:-3px}
#atomic .atomic-cap{margin:0;border-top:1px solid var(--line);background:var(--card);padding:11px 14px;font:400 11.5px/1.5 var(--mono);color:var(--mute);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#atomic .atomic-cap b{font-weight:500;color:var(--ink);margin-right:8px}

/* card 2: notext art + live text */
#atomic .atomic-type-box{display:flex;flex-direction:column;align-items:center;justify-content:center;
  background-image:radial-gradient(circle at 50% 50%,rgba(23,22,27,.08) 1.2px,transparent 1.8px);background-size:20px 20px;background-position:10px 10px}
#atomic .atomic-chip{position:absolute;top:14px;font:400 11px/1 var(--mono);color:var(--ink2);background:var(--card);border:1px solid var(--line);border-radius:5px;padding:5px 7px}
#atomic .atomic-chip-l{left:14px}
#atomic .atomic-chip-r{right:14px;color:var(--sel);border-color:color-mix(in srgb,var(--sel) 35%,var(--line))}
#atomic .atomic-btn-wrap{position:relative;width:100%;height:58%;display:flex;align-items:center;justify-content:center}
#atomic .atomic-btn{position:absolute;left:50%;top:50%;transform-origin:0 0}
#atomic .atomic-btn img{position:absolute;max-width:none;user-select:none;-webkit-user-drag:none}
#atomic .atomic-btn .tb{position:absolute;border:dashed var(--sel);border-width:calc(1px / var(--k,1));border-radius:calc(2px / var(--k,1))}
#atomic .atomic-btn .tb::after{content:"TextLabel";position:absolute;left:-1px;bottom:100%;margin-bottom:calc(4px / var(--k,1));font:400 calc(10px / var(--k,1))/1 var(--mono);color:var(--sel);white-space:nowrap}
#atomic .atomic-btn .atomic-t{transition:none}
#atomic .atomic-field{position:absolute;left:14px;right:14px;bottom:14px;display:flex;align-items:center;gap:10px;height:40px;padding:0 6px 0 12px;background:var(--card);border:1px solid var(--line);border-radius:9px;transition:border-color .15s,box-shadow .15s}
#atomic .atomic-field:focus-within{border-color:var(--sel);box-shadow:0 0 0 3px var(--sel-soft)}
#atomic .atomic-field span{font:400 11px/1 var(--mono);color:var(--mute);flex:none}
#atomic .atomic-field input{flex:1;min-width:0;height:100%;border:0;background:none;font:500 15px var(--sans);color:var(--ink);outline:none;letter-spacing:-.01em}
#atomic .atomic-spec{margin:18px 0 0;display:grid;grid-template-columns:repeat(4,auto);justify-content:start;column-gap:28px;row-gap:4px;font:400 11.5px/1.5 var(--mono)}
#atomic .atomic-spec div{display:contents}
#atomic .atomic-spec dt{grid-row:1;color:var(--mute)}
#atomic .atomic-spec dd{grid-row:2;margin:0;color:var(--ink);white-space:nowrap}
#atomic .atomic-spec .sw{display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:6px;vertical-align:-1px;box-shadow:0 0 0 1px rgba(23,22,27,.25) inset}

/* ---------- static modes: mobile + reduced motion ---------- */
#atomic.is-static .atomic-track{height:auto}
#atomic.is-static .atomic-sticky{position:relative;top:0;height:auto;display:block}
#atomic.is-static .atomic-steps{display:none}
@media (prefers-reduced-motion:reduce){
  #atomic .atomic-track{height:auto}
  #atomic .atomic-sticky{position:relative;top:0;height:auto;display:block}
  #atomic .atomic-frame{height:760px}
  #atomic .atomic-steps{display:none}
}
@media (max-width:820px){
  #atomic .atomic-track{height:auto}
  #atomic .atomic-sticky{position:relative;top:0;height:auto;display:block}
  #atomic .atomic-frame{height:auto;min-height:0;max-height:none}
  #atomic .atomic-view{position:relative;inset:auto;display:flex;flex-direction:column}
  #atomic .atomic-hud{top:14px;font-size:11px}
  #atomic .atomic-hud-l{left:14px}#atomic .atomic-hud-r{right:14px}
  #atomic .atomic-hud-r [data-a="kids"],#atomic .atomic-hud-r .atomic-dot:nth-of-type(2){display:none}
  #atomic .atomic-scene{position:relative;left:auto;top:auto;width:100%;height:470px;flex:none}
  #atomic .atomic-scene>.atomic-world{left:50%;top:50%}
  #atomic .atomic-leads{display:none}
  #atomic .atomic-notes{position:relative;left:auto;top:auto;width:auto;height:auto;border-top:1px solid var(--line);background:var(--card)}
  #atomic .atomic-note{position:relative;transform:none!important;opacity:1!important;max-width:none;border-left:0;border-bottom:1px solid var(--line);padding:12px 16px}
  #atomic .atomic-note:last-child{border-bottom:0}
  #atomic .atomic-note .m,#atomic .atomic-note .x{white-space:normal}
  #atomic .atomic-steps{display:none}
  #atomic .atomic-grid{grid-template-columns:repeat(3,1fr)}
  #atomic .atomic-spec{grid-template-columns:repeat(2,auto);row-gap:2px}
  #atomic .atomic-spec div{display:block}
  #atomic .atomic-spec dt,#atomic .atomic-spec dd{grid-row:auto}
}
#atomic .atomic-foot{margin:14px 0 0;font:400 11.5px/1.5 var(--mono);color:var(--mute)}