/* Equation Tables — shared chrome: top bar, buttons, info pop-ups. Loaded last on every page. */
:root{
  --bar-h:54px;
  --btn-top:#4a6597; --btn-bot:#2f4672; --btn-edge:#16233f;
  --sel-top:#5b9cf0; --sel-bot:#2d68c4; --sel-edge:#173f80;
  --pri-top:#ffb56b; --pri-bot:#ee852a; --pri-edge:#9a520f;
}
html{scroll-padding-top:calc(var(--bar-h) + 8px)}
body{padding-top:var(--bar-h)!important}

/* ---------- top bar: identical on every page, and unlike anything in the content below ---------- */
/* A light paper strip with folder tabs: navigation reads as navigation, not as another control. */
.suitebar{position:fixed;inset:0 0 auto 0;height:var(--bar-h);z-index:100;display:flex;align-items:flex-end;gap:18px;padding:0 16px;
  background:linear-gradient(#f4eedd,#e4dbc4);border-bottom:3px solid #0a1324;box-shadow:0 2px 10px rgba(0,0,0,.45);
  font-family:"IBM Plex Sans Condensed","Arial Narrow",system-ui,sans-serif}
.suitebar .mark{align-self:center;font-weight:700;font-size:17px;color:#0d2147;letter-spacing:.01em;white-space:nowrap;text-decoration:none}
.suitebar .mark span{color:#c4610f}
.suitebar nav{display:flex;gap:3px;overflow-x:auto;scrollbar-width:none;align-self:flex-end;height:42px}
.suitebar nav::-webkit-scrollbar{display:none}
.suitebar nav a{display:flex;align-items:center;height:42px;box-sizing:border-box;padding:0 16px;font-size:15px;font-weight:600;color:#34405a;text-decoration:none;white-space:nowrap;
  border-radius:7px 7px 0 0;border:1px solid transparent;border-bottom:0}
.suitebar nav a:hover{color:#0d2147;background:rgba(13,33,71,.08)}
.suitebar nav a[aria-current]{color:#fff;background:#0a1324;border-color:#0a1324}
.suitebar .home{align-self:center;margin-left:auto;font-size:14px;font-weight:600;color:#34405a;text-decoration:none;white-space:nowrap}
.suitebar .home:hover{color:#c4610f}
@media (max-width:640px){.suitebar .mark{display:none}.suitebar nav a{padding:9px 10px}}

/* ---------- buttons: filled, bevelled, pressed when selected ---------- */
button,.btn{font-family:"IBM Plex Sans Condensed","Arial Narrow",system-ui,sans-serif;font-size:14px;font-weight:600;line-height:1.2;letter-spacing:.01em;
  color:#f4f1e8;background:linear-gradient(var(--btn-top),var(--btn-bot));border:1px solid var(--btn-edge);border-radius:6px;padding:7px 13px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 1px 2px rgba(0,0,0,.5);text-shadow:0 1px 0 rgba(0,0,0,.4);
  cursor:pointer;white-space:nowrap;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:6px;user-select:none}
button:hover,.btn:hover{background:linear-gradient(#5874aa,#36507f);color:#fff}
button:active,.btn:active{background:linear-gradient(#2a3f66,#3a5585);box-shadow:inset 0 2px 4px rgba(0,0,0,.55)}
button[aria-pressed=true],.btn[aria-current]{color:#fff;background:linear-gradient(var(--sel-top),var(--sel-bot));border-color:var(--sel-edge);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.3),inset 0 -1px 0 rgba(0,0,0,.2),0 0 0 1px rgba(91,156,240,.25)}
button.primary{color:#2a1604;text-shadow:0 1px 0 rgba(255,255,255,.35);background:linear-gradient(var(--pri-top),var(--pri-bot));border-color:var(--pri-edge)}
button.primary:hover{background:linear-gradient(#ffc282,#f6912f)}
button:disabled{opacity:.45;cursor:not-allowed;filter:saturate(.4)}
button:focus-visible,.btn:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid #ffb062;outline-offset:2px}

/* segmented groups: buttons joined edge to edge */
.seg{display:inline-flex;flex-wrap:nowrap}
.seg>button{border-radius:0;margin:0}
.seg>button+button{border-left-width:0}
.seg>button:first-child{border-radius:6px 0 0 6px}
.seg>button:last-child{border-radius:0 6px 6px 0}

/* form controls that look like controls */
select,input[type=text],input[type=number]{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:13.5px;color:#f1ede2;
  background:linear-gradient(#0b1528,#101f3a);border:1px solid #3a5482;border-radius:6px;padding:7px 9px;box-shadow:inset 0 1px 3px rgba(0,0,0,.5);min-width:0}
select{cursor:pointer}

/* ---------- info pop-ups ---------- */
button.info{width:22px;height:22px;padding:0;border-radius:50%;font:italic 700 13px Georgia,"Times New Roman",serif;flex:none;
  color:#10223f;text-shadow:none;background:linear-gradient(#f5f0e2,#cfc6ae);border-color:#8d846c}
button.info:hover{background:linear-gradient(#fffaf0,#ddd4bc);color:#10223f}
.infopop{position:fixed;z-index:200;max-width:min(380px,calc(100vw - 24px));background:#f7f2e4;color:#1b2234;border-radius:10px;padding:14px 16px 14px;
  box-shadow:0 12px 32px rgba(0,0,0,.55);font:15px/1.5 "IBM Plex Sans Condensed","Arial Narrow",system-ui,sans-serif}
.infopop h4{margin:0 0 6px;font-size:15.5px;color:#0f2b5b}
.infopop p{margin:0 0 8px}.infopop p:last-child{margin:0}
.infopop b{color:#0f2b5b}
.infopop .x{position:absolute;right:8px;top:6px;width:24px;height:24px;padding:0;border-radius:50%;font-size:15px;background:linear-gradient(#e3dcc8,#c9c0a8);color:#333;border-color:#9b937c;text-shadow:none;box-shadow:none}
template{display:none}