/* 양자역학 — 고전역학 실험판(/sim/)의 짝. 팔레트는 science.css 변수 위에서. */
*{box-sizing:border-box}
body.qpage{margin:0;min-height:100vh;background:var(--ink);-webkit-text-size-adjust:100%}
#wrap{max-width:900px;margin:0 auto;padding:0 18px 40px}

#head{display:flex;align-items:center;gap:12px;padding:14px 0 10px;flex-wrap:wrap}
#backbtn{width:34px;height:34px;flex:0 0 auto;font-size:17px;line-height:1;color:var(--chalk);
  background:var(--ink-2);border:1px solid var(--ink-3);border-radius:9px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;padding:0;transition:.16s}
#backbtn:hover{border-color:var(--brass);color:var(--brass)}
.brandline{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--brass);text-decoration:none}
.brandline b{color:var(--chalk);font-weight:500}
.h-sp{flex:1}
.h-lib,.h-lang{font-size:12.5px;color:var(--chalk-dim);text-decoration:none;border:1px solid var(--ink-3);
  border-radius:7px;padding:6px 11px;transition:.16s}
.h-lib:hover,.h-lang:hover{border-color:var(--brass);color:var(--brass)}

.pg-h{font-family:var(--disp);font-weight:700;font-size:31px;color:var(--chalk);margin:8px 0 14px;line-height:1.32}
.pg-sub{font-size:14.5px;line-height:1.85;color:var(--chalk-dim);word-break:keep-all;margin:0 0 22px;max-width:70ch}
.pg-sub b,.after-note b,.sec-sub b{color:var(--chalk);font-weight:600}
.s-kicker{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--brass);margin:18px 0 8px}
.sec-h{font-family:var(--disp);font-weight:700;font-size:21px;color:var(--chalk);margin:0 0 10px}
.sec-sub{font-size:13.5px;line-height:1.85;color:var(--chalk-dim);word-break:keep-all;margin:0 0 20px;max-width:70ch}
section{margin-bottom:36px;padding-bottom:30px;border-bottom:1px solid var(--ink-3)}
.after-note{font-size:13.5px;line-height:1.9;color:var(--chalk-dim);word-break:keep-all;margin:18px 0 0;max-width:70ch}

/* 대비 표 — 두 줄기 */
#fork{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:0 0 22px}
#fork div{background:var(--ink-2);border:1px solid var(--ink-3);border-radius:12px;padding:14px 15px}
#fork div.q{border-color:rgba(98,198,201,.4)}
#fork em{display:block;font-style:normal;font-family:var(--mono);font-size:10px;letter-spacing:.14em;
  color:var(--brass);margin-bottom:8px}
#fork div.q em{color:var(--cyan)}
#fork b{display:block;font-family:var(--disp);font-size:15.5px;color:var(--chalk);margin-bottom:6px;line-height:1.5}
#fork span{display:block;font-size:12.5px;line-height:1.8;color:var(--chalk-dim);word-break:keep-all}
#fork a{color:var(--cyan);text-decoration:none}
#fork a:hover{text-decoration:underline}
@media (max-width:560px){#fork{grid-template-columns:1fr}}

/* ① 이중슬릿 */
#ds-stage{background:var(--ink-2);border:1px solid var(--ink-3);border-radius:12px;padding:14px;
  margin-bottom:14px;overflow-x:auto}
#ds-cv{display:block;width:100%;max-width:560px;height:auto;margin:0 auto}
#ds-meta{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin-top:10px}
#ds-n{font-family:var(--mono);font-size:14px;color:var(--brass-soft)}
#ds-say{font-size:13.5px;line-height:1.85;color:var(--chalk-dim);margin:8px 0 0;word-break:keep-all;
  min-height:3.7em}
#ds-say b{color:var(--brass-soft)}
.ds-watching #ds-say b{color:#E08A6B}
.ctl-line{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:0 0 12px}
.brassbtn{padding:11px 18px;font-size:14px;font-weight:700;color:var(--ink);background:var(--brass);
  border:none;border-radius:9px;cursor:pointer;font-family:inherit;transition:transform .14s}
.brassbtn:active{transform:scale(.985)}
.ghostbtn{padding:9px 15px;font-size:13px;color:var(--chalk);background:none;border:1px solid var(--ink-3);
  border-radius:8px;cursor:pointer;font-family:inherit;transition:.16s}
.ghostbtn:hover{border-color:var(--chalk-dim)}
.det-tog{display:inline-flex;align-items:center;gap:8px;cursor:pointer;user-select:none;
  font-size:13px;color:var(--chalk-dim);border:1px solid var(--ink-3);border-radius:8px;padding:8px 12px}
.det-tog input{accent-color:var(--brass)}
.ds-watching .det-tog{border-color:#E08A6B;color:#E08A6B}

/* ② 고양이 */
#cat-stage{display:grid;grid-template-columns:minmax(0,220px) 1fr;gap:16px;align-items:center;
  background:var(--ink-2);border:1px solid var(--ink-3);border-radius:12px;padding:16px;margin-bottom:14px}
@media (max-width:560px){#cat-stage{grid-template-columns:1fr}}
#cat-box{position:relative;height:150px;border:2px solid var(--chalk-dim);border-radius:10px;
  display:flex;align-items:center;justify-content:center;background:var(--ink);overflow:hidden}
#cat-box::after{content:'?';font-family:var(--disp);font-weight:700;font-size:52px;color:var(--chalk-dim)}
#cat-box.is-open::after{content:'—';color:#E08A6B}
#cat-box.is-open.is-quiet::after{content:'\2714';color:#8FA96B}
#cat-say{font-size:14px;line-height:1.85;color:var(--chalk-dim);margin:0 0 12px;word-break:keep-all;min-height:3.7em}
#cat-say b{color:var(--chalk)}
#cat-tally{font-family:var(--mono);font-size:12px;color:var(--chalk-dim);margin:0 0 8px;min-height:1.2em}
#cat-bar{height:10px;border-radius:5px;background:#E08A6B;overflow:hidden;margin-bottom:12px}
#cat-bar::before{content:'';display:block;height:100%;width:var(--q,50%);background:#8FA96B;transition:width .25s}

/* 출처·마무리 */
#src h2{font-family:var(--disp);font-weight:700;font-size:19px;color:var(--chalk);margin:0 0 14px}
#src ul{margin:0;padding-left:18px}
#src li{font-size:13.5px;line-height:1.9;color:var(--chalk-dim);margin-bottom:10px;word-break:keep-all}
#src li b{color:var(--chalk);font-weight:600}
#src a{color:var(--cyan);text-decoration:none}
#src a:hover{text-decoration:underline}
.src-warn{font-size:13px;line-height:1.9;color:var(--chalk-dim);background:var(--ink-2);
  border-left:2px solid var(--brass);border-radius:0 8px 8px 0;padding:12px 14px;margin:14px 0 0;word-break:keep-all}
.src-warn b{color:var(--chalk)}
.foot-note{font-family:var(--disp);font-size:15px;line-height:1.9;color:var(--brass-soft);
  word-break:keep-all;margin:0 0 30px;max-width:70ch}
.qpage .footer{margin-top:10px}
@media (prefers-reduced-motion:reduce){.qpage *{transition:none!important;animation:none!important}}
@media (max-width:560px){.pg-h{font-size:25px}}