/* =====================================================================
   EXAM HUB — COMPONENTS
   Shared by the hub, every term/stream page and the style guide.
   Every activity uses the same accent: the old part classes (.p-vocab,
   .p-grammar, .p-reading, .p-writing, .p-mock) all map to turquoise.
   ===================================================================== */
.p-vocab,.p-grammar,.p-reading,.p-writing,.p-mock{--part:var(--teal-ink);--part-tint:var(--teal-soft)}

/* ---------- Icons ---------- */
.i{width:1.1em;height:1.1em;flex:none;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- Gel buttons ----------
   A glossy, raised pill. It lifts on hover and presses down onto its
   "lip" when tapped; eh-ui.js adds a ripple and eh-sound.js a click. */
.btn{
  --t:var(--gel-t);--b:var(--gel-b);--lip:var(--gel-lip);--ink:var(--gel-ink);
  position:relative;isolation:isolate;overflow:hidden;
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:2.8rem;padding:.65rem 1.35rem;border-radius:var(--r-pill);
  font-family:var(--font-ui);font-size:.95rem;font-weight:800;letter-spacing:.005em;line-height:1.15;
  text-decoration:none;white-space:nowrap;color:var(--ink);
  background:var(--b);
  background:linear-gradient(180deg,var(--t) 0%,var(--b) 100%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.7),inset 0 -3px 4px rgba(0,0,0,.07),0 3px 0 var(--lip),0 9px 18px -8px rgba(0,70,80,.45);
  transform:translateY(0);
  transition:transform .14s cubic-bezier(.3,.7,.4,1.4),box-shadow .14s,filter .2s;
  -webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none;
}
.btn::before{
  content:"";position:absolute;z-index:-1;left:7%;right:7%;top:2px;height:50%;border-radius:var(--r-pill);
  background:linear-gradient(180deg,rgba(255,255,255,.9),rgba(255,255,255,.15));pointer-events:none;
}
.btn:hover{
  filter:brightness(1.04) saturate(1.06);transform:translateY(-1px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.75),inset 0 -3px 4px rgba(0,0,0,.07),0 4px 0 var(--lip),0 14px 22px -10px rgba(0,70,80,.5);
}
.btn:active,.btn.is-pressed{
  transform:translateY(3px);transition-duration:.05s;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.55),inset 0 3px 7px rgba(0,0,0,.14),0 0 0 var(--lip),0 3px 6px -3px rgba(0,70,80,.4);
}
.btn .i{width:1.15em;height:1.15em;stroke-width:2.3;transition:transform .25s}
.btn:hover .i-arrow{transform:translateX(3px)}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;filter:saturate(.6);box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 2px 0 var(--lip)}
.btn-sm{min-height:2.25rem;padding:.45rem .95rem;font-size:.84rem;gap:.4rem}
.btn-lg{min-height:3.4rem;padding:.85rem 1.8rem;font-size:1.08rem}
.btn-block{width:100%}

/* Colour recipes: turquoise is the default; the rest are for meaning */
.btn-gold,.btn-part,.btn-primary{--t:var(--gel-t);--b:var(--gel-b);--lip:var(--gel-lip);--ink:var(--gel-ink)}
.btn-ghost,.btn-white{--t:var(--gelw-t);--b:var(--gelw-b);--lip:var(--gelw-lip);--ink:var(--gelw-ink)}
.btn-green{--t:var(--gelg-t);--b:var(--gelg-b);--lip:var(--gelg-lip);--ink:var(--gelg-ink)}
.btn-coral{--t:var(--gelc-t);--b:var(--gelc-b);--lip:var(--gelc-lip);--ink:var(--gelc-ink)}
.btn-sun{--t:var(--gels-t);--b:var(--gels-b);--lip:var(--gels-lip);--ink:var(--gels-ink)}
.btn-ink{--t:#2F5A86;--b:#10304F;--lip:#061A2C;--ink:#FFFFFF}
.btn-ink::before{opacity:.35}
.btn-ghost .i,.btn-white .i{color:var(--teal-deep)}

/* Ripple (added by eh-ui.js at the point of the tap) */
.ripple{position:absolute;z-index:-1;border-radius:50%;pointer-events:none;background:rgba(255,255,255,.7);transform:scale(0);animation:eh-ripple .6s cubic-bezier(.2,.8,.2,1) forwards}
@keyframes eh-ripple{to{transform:scale(1);opacity:0}}

/* Round gel icon button */
.icon-btn{
  position:relative;isolation:isolate;overflow:hidden;
  width:2.6rem;height:2.6rem;border-radius:50%;display:grid;place-items:center;flex:none;
  color:var(--teal-ink);
  background:linear-gradient(180deg,var(--gelw-t),var(--gelw-b));
  box-shadow:inset 0 1px 0 #fff,0 0 0 1px var(--line),0 3px 0 var(--gelw-lip),0 8px 14px -8px rgba(0,70,80,.4);
  transition:transform .14s cubic-bezier(.3,.7,.4,1.4),box-shadow .14s,color .2s;
}
.icon-btn .i{width:1.2rem;height:1.2rem}
.icon-btn:hover{transform:translateY(-1px);color:var(--teal-deep)}
.icon-btn:active{transform:translateY(3px);box-shadow:inset 0 2px 5px rgba(0,0,0,.1),0 0 0 1px var(--line),0 0 0 var(--gelw-lip)}
.icon-btn[aria-pressed="true"]{color:var(--gel-ink);background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.7),0 3px 0 var(--gel-lip),0 8px 14px -8px rgba(0,70,80,.45)}

/* ---------- Preference controls ---------- */
.prefs{display:flex;align-items:center;gap:.5rem}
.ar-switch{
  position:relative;isolation:isolate;overflow:hidden;
  display:inline-flex;align-items:center;gap:.45rem;height:2.6rem;padding:0 .95rem 0 .4rem;border-radius:var(--r-pill);
  font-size:var(--fs-sm);font-weight:800;color:var(--fg-2);
  background:linear-gradient(180deg,var(--gelw-t),var(--gelw-b));
  box-shadow:inset 0 1px 0 #fff,0 0 0 1px var(--line),0 3px 0 var(--gelw-lip);transition:transform .14s,box-shadow .14s;
}
.ar-switch:active{transform:translateY(3px);box-shadow:inset 0 2px 5px rgba(0,0,0,.1),0 0 0 1px var(--line)}
.ar-switch .glyph{
  width:1.85rem;height:1.85rem;border-radius:50%;display:grid;place-items:center;
  font-family:var(--font-ar);font-weight:700;font-size:1.02rem;line-height:1;background:var(--teal-soft);color:var(--teal-ink);transition:all .2s;
}
.ar-switch[aria-pressed="true"]{color:var(--fg)}
.ar-switch[aria-pressed="true"] .glyph{background:linear-gradient(180deg,var(--gel-t),var(--gel-b));color:var(--gel-ink);box-shadow:inset 0 1px 0 rgba(255,255,255,.7)}

/* Segmented control (levels, timers, model level, …) */
.seg{display:inline-flex;padding:4px;border-radius:var(--r-pill);background:var(--bg-sunken);box-shadow:inset 0 1px 3px rgba(0,60,70,.1),inset 0 0 0 1px var(--line);gap:3px;max-width:100%;overflow-x:auto;scrollbar-width:none}
.seg::-webkit-scrollbar{display:none}
.seg button{
  position:relative;padding:.45rem .95rem;border-radius:var(--r-pill);font-size:var(--fs-xs);font-weight:800;letter-spacing:.02em;
  color:var(--fg-3);transition:color .2s,background .2s,box-shadow .2s,transform .12s;white-space:nowrap;
}
.seg button:hover{color:var(--fg)}
.seg button:active{transform:translateY(1px)}
.seg button[aria-checked="true"]{
  color:var(--gel-ink);background:linear-gradient(180deg,var(--gel-t),var(--gel-b));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.7),0 2px 0 var(--gel-lip),0 5px 10px -5px rgba(0,70,80,.5);
}
.seg .lv-dot{display:inline-block;width:.5rem;height:.5rem;border-radius:50%;margin-right:.4rem;vertical-align:.05em;background:currentColor;opacity:.55}
.seg button[aria-checked="true"] .lv-dot{opacity:1}
.lv-short{display:none}
@media (max-width:640px){
  .seg button{padding:.45rem .65rem}
  .seg .lv-name{display:none}
  .seg .lv-short{display:inline!important}
  .ar-switch .lbl{display:none}
  .ar-switch{padding:0 .38rem}
}

/* Toggle switch (Instant feedback, sound, …) */
.tgl,.maze-switch{display:inline-flex;align-items:center;gap:.6rem;font-size:var(--fs-sm);font-weight:700;color:var(--fg-2);white-space:nowrap}
.tgl-track,.ms-track{width:2.6rem;height:1.5rem;border-radius:999px;background:var(--bg-sunken);box-shadow:inset 0 1px 3px rgba(0,60,70,.18),inset 0 0 0 1px var(--line-strong);position:relative;transition:background .2s;flex:none}
.tgl-thumb,.ms-thumb{position:absolute;top:.17rem;left:.17rem;width:1.16rem;height:1.16rem;border-radius:50%;background:linear-gradient(180deg,#fff,#E3F3F1);box-shadow:0 1px 2px rgba(0,60,70,.3),0 0 0 1px rgba(0,60,70,.08);transition:transform .22s cubic-bezier(.3,.7,.4,1.4)}
.tgl[aria-checked="true"] .tgl-track,.maze-switch[aria-checked="true"] .ms-track{background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 2px rgba(0,60,70,.2)}
.tgl[aria-checked="true"] .tgl-thumb,.maze-switch[aria-checked="true"] .ms-thumb{transform:translateX(1.1rem)}

/* ---------- Chips & badges ---------- */
.chip{
  display:inline-flex;align-items:center;gap:.4rem;padding:.28rem .72rem;border-radius:var(--r-pill);
  font-size:var(--fs-xs);font-weight:700;letter-spacing:.01em;line-height:1.3;white-space:nowrap;
  background:var(--teal-tint);color:var(--teal-ink);box-shadow:inset 0 0 0 1px var(--line);
}
.chip-part{background:var(--teal-soft);color:var(--teal-ink);box-shadow:none}
.chip-line{background:transparent;color:var(--fg-2);box-shadow:inset 0 0 0 1.5px var(--line-strong)}
.chip-ok{background:var(--ok-tint);color:var(--ok);box-shadow:none}
.chip-sun{background:var(--sun-soft);color:var(--sun-ink);box-shadow:none}
.cefr{
  display:inline-flex;align-items:baseline;gap:.35rem;padding:.22rem .7rem;border-radius:var(--r-pill);
  font-weight:900;font-size:.95rem;letter-spacing:.01em;color:var(--gel-ink);
  background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.7),0 2px 0 var(--gel-lip);
}
.cefr small{font-size:.66rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;opacity:.85}
.marks{display:inline-flex;align-items:baseline;gap:.15rem;font-weight:900;color:var(--teal-ink);font-variant-numeric:tabular-nums lining-nums}
.marks small{font-size:.68rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);margin-left:.25rem}

/* ---------- Surfaces ---------- */
.card{background:var(--bg-raised);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-1)}
.card-pad{padding:clamp(1.15rem,1rem + .8vw,1.75rem)}
.paper{
  position:relative;background:var(--paper);color:var(--paper-fg);
  border:1px solid var(--paper-line);border-radius:var(--r-lg);box-shadow:var(--shadow-1);
  padding:clamp(1.15rem,1rem + 1vw,2rem);
}
.paper-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.4rem 1rem;margin-bottom:.9rem;padding-bottom:.75rem;border-bottom:1px solid var(--paper-line)}
.paper-title{font-weight:800;font-size:var(--fs-lg);color:var(--paper-fg);letter-spacing:-.01em;line-height:1.2}
.paper-meta{font-size:var(--fs-xs);font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3)}
.passage{font-family:var(--font-read);font-size:var(--fs-read);font-weight:400;line-height:1.7;color:var(--paper-fg)}
.passage p+p{margin-top:.85em}
.passage .pn{display:inline-grid;place-items:center;width:1.45rem;height:1.45rem;margin-right:.5rem;border-radius:50%;vertical-align:.1em;font-family:var(--font-ui);font-size:.72rem;font-weight:800;color:var(--teal-ink);background:var(--teal-soft)}

/* ---------- Mark bar: the 100-mark paper at a glance ---------- */
.markbar{display:grid;gap:.8rem}
.mb-track{display:flex;gap:4px;height:.85rem}
.mb-seg{flex:var(--m) 1 0;min-width:0;border-radius:3px;background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.6);transform-origin:left center}
.mb-seg:nth-child(even){background:linear-gradient(180deg,#2FB9B0,#00807A)}
.mb-seg:first-child{border-radius:999px 3px 3px 999px}
.mb-seg:last-child{border-radius:3px 999px 999px 3px}
.mb-legend{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.6rem 1rem;margin:0;padding:0;list-style:none}
.mb-item{display:grid;gap:.05rem;min-width:0}
.mb-item .nm{font-size:var(--fs-xs);font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--fg-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mb-item .mk{font-size:1.5rem;font-weight:900;line-height:1.1;color:var(--fg);font-variant-numeric:tabular-nums lining-nums}
.mb-item .mk small{font-size:.72rem;font-weight:700;color:var(--fg-3);margin-left:.25rem}
@media (min-width:760px){
  .mb-legend{display:flex;gap:4px}
  .mb-item{flex:var(--m) 1 0;padding-right:.5rem}
}
.markbar.animate .mb-seg{animation:eh-grow .9s cubic-bezier(.2,.8,.2,1) both}
.markbar.animate .mb-seg:nth-child(2){animation-delay:.08s}
.markbar.animate .mb-seg:nth-child(3){animation-delay:.16s}
.markbar.animate .mb-seg:nth-child(4){animation-delay:.24s}
.markbar.animate .mb-seg:nth-child(5){animation-delay:.32s}

/* ---------- Answer options: gel pills with an A/B/C bubble ---------- */
.bubble{
  width:2rem;height:2rem;border-radius:50%;flex:none;display:grid;place-items:center;
  font-weight:900;font-size:.95rem;line-height:1;color:var(--teal-ink);
  background:var(--teal-tint);box-shadow:inset 0 0 0 1.5px var(--line-strong);transition:all .18s;
}
.opt{
  position:relative;isolation:isolate;overflow:hidden;
  display:flex;align-items:center;gap:.75rem;width:100%;text-align:left;
  padding:.5rem 1rem .5rem .5rem;border-radius:var(--r-pill);
  font-size:var(--fs-base);font-weight:600;line-height:1.35;color:var(--fg);
  background:linear-gradient(180deg,#FFFFFF,#F2FBFA);
  box-shadow:inset 0 1px 0 #fff,0 0 0 1px var(--line),0 2px 0 var(--gelw-lip);
  transition:transform .12s,box-shadow .12s,background .2s;
}
.opt:hover{box-shadow:inset 0 1px 0 #fff,0 0 0 1.5px var(--teal),0 2px 0 var(--gelw-lip)}
.opt:hover .bubble{box-shadow:inset 0 0 0 2px var(--teal)}
.opt:active{transform:translateY(2px);box-shadow:inset 0 2px 4px rgba(0,0,0,.08),0 0 0 1px var(--line)}
.opt[aria-pressed="true"]{background:linear-gradient(180deg,var(--gel-t),var(--gel-b));color:var(--gel-ink);box-shadow:inset 0 1px 0 rgba(255,255,255,.7),0 2px 0 var(--gel-lip),0 8px 14px -8px rgba(0,70,80,.5)}
.opt[aria-pressed="true"] .bubble{background:#fff;color:var(--teal-ink);box-shadow:none}
.opt.is-correct{background:linear-gradient(180deg,var(--gelg-t),var(--gelg-b));color:var(--gelg-ink);box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 2px 0 var(--gelg-lip)}
.opt.is-correct .bubble{background:#fff;color:var(--ok);box-shadow:none}
.opt.is-wrong{background:linear-gradient(180deg,var(--gelc-t),var(--gelc-b));color:var(--gelc-ink);box-shadow:inset 0 1px 0 rgba(255,255,255,.55),0 2px 0 var(--gelc-lip)}
.opt.is-wrong .opt-text{text-decoration:line-through;text-decoration-thickness:2px}
.opt.is-wrong .bubble{background:#fff;color:var(--bad);box-shadow:none}
.opt.is-answer{box-shadow:inset 0 0 0 2px var(--ok),0 0 0 4px var(--ok-tint)}
.opt.is-answer .bubble{background:var(--ok);color:#fff;box-shadow:none}
.opt.is-locked{pointer-events:none}
.opt.is-locked:not(.is-correct):not(.is-wrong):not(.is-answer){opacity:.6}

/* ---------- Explanation after checking ---------- */
.why{
  display:grid;gap:.35rem;padding:.8rem 1rem;border-radius:var(--r-md);
  background:var(--bg-soft);border:1px solid var(--line);font-size:var(--fs-sm);line-height:1.55;color:var(--fg-2);
  animation:eh-rise .35s ease both;
}
.why-label{display:inline-flex;align-items:center;gap:.4rem;font-size:.72rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase}
.why.ok{background:var(--ok-tint);border-color:transparent}
.why.bad{background:var(--bad-tint);border-color:transparent}
.why.ok .why-label{color:var(--ok)}
.why.bad .why-label{color:var(--bad)}
.why b{color:var(--fg)}

/* ---------- Grammar rule card ---------- */
.formula{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem}
.tok{padding:.4rem .8rem;border-radius:var(--r-sm);font-weight:800;font-size:var(--fs-sm);background:var(--bg-soft);color:var(--fg);box-shadow:inset 0 0 0 1px var(--line)}
.tok-key{color:var(--gel-ink);background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.65),0 2px 0 var(--gel-lip)}
.tok-soft{background:var(--teal-soft);color:var(--teal-ink);box-shadow:none}
.formula .plus{color:var(--fg-3);font-weight:800}
mark.hl{background:transparent;color:var(--teal-ink);font-weight:700;box-shadow:inset 0 -.4em 0 var(--teal-soft)}

/* ---------- Callouts ---------- */
.callout{display:grid;grid-template-columns:auto 1fr;gap:.2rem .8rem;align-items:start;padding:1rem 1.15rem;border-radius:var(--r-md);background:var(--sun-soft);color:var(--fg)}
.callout>.i{width:1.35rem;height:1.35rem;color:var(--sun-ink);margin-top:.1rem}
.callout-title{font-weight:900;font-size:var(--fs-sm);letter-spacing:.01em}
.callout-body{grid-column:2;font-size:var(--fs-sm);line-height:1.55;color:var(--fg-2)}
.callout.trap{background:var(--coral-soft)}.callout.trap>.i{color:var(--bad)}
.callout.info{background:var(--teal-tint);box-shadow:inset 0 0 0 1px var(--line)}.callout.info>.i{color:var(--teal-ink)}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--bg-raised)}
.table{width:100%;min-width:42rem;border-collapse:collapse;font-size:var(--fs-sm)}
.table th{text-align:left;font-size:.72rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase;color:var(--teal-ink);padding:.85rem 1rem;border-bottom:1px solid var(--line);background:var(--teal-tint)}
.table td{padding:.95rem 1rem;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.5;color:var(--fg-2)}
.table tr:last-child td{border-bottom:0}
.table td.part-cell{white-space:nowrap;color:var(--fg)}
.table .mk{font-weight:900;font-size:1.25rem;color:var(--teal-ink);font-variant-numeric:tabular-nums lining-nums}

/* ---------- Forms ---------- */
.field{display:grid;gap:.35rem}
.field>span{font-size:var(--fs-xs);font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3)}
.input{width:100%;height:2.9rem;padding:0 1rem;border-radius:var(--r-md);border:1.5px solid var(--line-strong);background:#fff;font-size:var(--fs-base);color:var(--fg);transition:border-color .2s,box-shadow .2s}
.input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 4px var(--teal-soft)}
.check{display:inline-flex;gap:.55rem;align-items:center;font-weight:700;cursor:pointer}
.check input,.tick-list input{width:1.15rem;height:1.15rem;accent-color:var(--teal-deep)}

/* ---------- Toast ---------- */
.toast-host{
  position:fixed;left:50%;transform:translateX(-50%);z-index:260;display:grid;gap:.5rem;justify-items:center;pointer-events:none;
  bottom:calc(1.25rem + env(safe-area-inset-bottom,0px));width:min(92vw,30rem);
}
.toast{
  display:flex;align-items:center;gap:.6rem;padding:.75rem 1.2rem;border-radius:var(--r-pill);
  background:linear-gradient(180deg,#2B527A,#10304F);color:#fff;font-size:var(--fs-sm);font-weight:700;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 3px 0 #061A2C,var(--shadow-3);
  animation:eh-rise .3s ease both;
}
.toast .i{color:var(--teal-bright)}

/* ---------- Section bar: one section on screen at a time ---------- */
.secnav{display:flex;gap:.35rem;overflow-x:auto;scrollbar-width:none;padding:.35rem;border-radius:var(--r-pill);background:var(--bg-soft);box-shadow:inset 0 1px 3px rgba(0,60,70,.08),inset 0 0 0 1px var(--line);width:fit-content;max-width:100%}
.secnav::-webkit-scrollbar{display:none}
.secbtn{
  position:relative;isolation:isolate;overflow:hidden;
  flex:none;display:inline-flex;align-items:center;gap:.5rem;padding:.6rem 1.1rem;border-radius:var(--r-pill);white-space:nowrap;
  font-size:var(--fs-sm);font-weight:800;color:var(--fg-2);transition:color .2s,background .2s,box-shadow .2s,transform .12s;
}
.secbtn .i{width:1.05rem;height:1.05rem;color:var(--teal-deep)}
.secbtn:hover{color:var(--fg);background:rgba(255,255,255,.7)}
.secbtn:active{transform:translateY(2px)}
.secbtn[aria-selected="true"]{
  color:var(--gel-ink);background:linear-gradient(180deg,var(--gel-t),var(--gel-b));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.7),0 3px 0 var(--gel-lip),0 8px 14px -8px rgba(0,70,80,.5);
}
.secbtn[aria-selected="true"] .i{color:var(--gel-ink)}
.sec-badge{font-size:.7rem;font-weight:900;min-width:1.35rem;height:1.35rem;padding:0 .35rem;border-radius:var(--r-pill);display:inline-grid;place-items:center;background:var(--teal-soft);color:var(--teal-ink)}
.secbtn[aria-selected="true"] .sec-badge{background:rgba(255,255,255,.75)}
.secbody{min-width:0}
.secpane{display:grid;gap:1.25rem;animation:eh-fade .3s ease both;min-width:0}

/* ---------- Mobile part tabs ---------- */
.tabs{display:flex;gap:.35rem;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.tabs::-webkit-scrollbar{display:none}
.tab{
  display:inline-flex;align-items:center;gap:.45rem;padding:.55rem .95rem;border-radius:var(--r-pill);white-space:nowrap;
  font-size:var(--fs-sm);font-weight:800;color:var(--fg-2);text-decoration:none;transition:all .2s;
}
.tab .i{width:1rem;height:1rem;color:var(--teal-deep)}
.tab:hover{color:var(--fg);background:var(--bg-tint)}
.tab[aria-current="page"]{color:var(--gel-ink);background:linear-gradient(180deg,var(--gel-t),var(--gel-b));box-shadow:inset 0 1px 0 rgba(255,255,255,.7),0 2px 0 var(--gel-lip)}
.tab[aria-current="page"] .i{color:var(--gel-ink)}

/* ---------- Bits ---------- */
kbd{font-family:var(--font-ui);font-size:.74rem;font-weight:800;padding:.1rem .42rem;border-radius:5px;background:#fff;box-shadow:inset 0 0 0 1px var(--line-strong),0 2px 0 var(--line-strong);color:var(--fg-2)}
.empty{display:grid;gap:.75rem;justify-items:center;text-align:center;padding:3rem 1rem;border-radius:var(--r-xl);background:var(--bg-soft);border:2px dashed var(--line-strong)}
.empty b{font-size:1.35rem;font-weight:900}
.empty p{color:var(--fg-2)}
.empty .bubbles{display:flex;gap:.4rem}
.empty .bubble.on{background:linear-gradient(180deg,var(--gel-t),var(--gel-b));color:var(--gel-ink);box-shadow:0 2px 0 var(--gel-lip)}
.empty-note{text-align:center;padding:2rem 0}
.lo{font-family:var(--font-mono);font-size:.72rem;color:var(--fg-3);letter-spacing:.01em}

/* Confetti layer (EH.confetti) */
.confetti{position:fixed;inset:0;z-index:300;pointer-events:none}