/* QuizX — student accounts (features/STUDENT-ACCOUNTS.md §9).
   /elev    public/student-join.html  (sign-up / sign-in, class code)
   /student public/student.html       (to do, results, progress, classes, account)
   Dark "product" theme on the Stagecraft tokens of quizx.css, same rules as
   test.css: opaque surfaces, 2px keylines, no gradients behind text, 44px+
   targets, visible focus. The four answer glyphs (▲ ◆ ● ■) mark the sections:
   the product's own alphabet instead of stock icons. */
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--qx-font);color:var(--qx-text);min-height:100vh;min-height:100dvh;line-height:1.45;overflow-x:hidden}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
[hidden]{display:none!important}
img,svg{max-width:100%}
a{color:var(--qx-accent-text);text-underline-offset:3px}
a:hover{color:var(--qx-text)}
.st-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.st-skip{position:absolute;left:12px;top:-60px;z-index:100;padding:10px 14px;border-radius:10px;background:var(--qx-surface);border:2px solid var(--qx-accent-2);font-weight:800;text-decoration:none;color:var(--qx-text)}
.st-skip:focus{top:12px}

/* ── Top bar ─────────────────────────────────────────────────────── */
.st-top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:12px;min-height:60px;padding:8px 16px;padding-top:calc(8px + env(safe-area-inset-top));border-bottom:2px solid var(--qx-border);background:var(--qx-bg-2)}
.st-top .qx-logo__img{height:28px}
.st-top-sp{flex:1}
.st-top .qx-lang-switch{font-size:13px}
.st-top .qx-lang-btn{min-height:40px;min-width:44px}
.st-top .qx-logo{min-height:44px}
.st-top-btn{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:10px;border:2px solid var(--qx-border);background:var(--qx-surface);color:var(--qx-text);font-weight:800;font-size:14px;text-decoration:none;white-space:nowrap}
.st-top-btn:hover{background:var(--qx-surface-2);color:var(--qx-text)}

/* ── Buttons, fields ─────────────────────────────────────────────── */
.st-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 18px;border-radius:12px;border:2px solid transparent;font-weight:800;font-size:16px;line-height:1.15;text-align:center;text-decoration:none;transition:background .15s,border-color .15s;-webkit-tap-highlight-color:transparent}
.st-btn:disabled,.st-btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed}
.st-btn-primary{background:var(--qx-accent);border-color:var(--qx-accent);color:var(--qx-accent-ink)}
.st-btn-primary:hover:not(:disabled){background:var(--qx-accent-2);border-color:var(--qx-accent-2);color:#fff}
.st-btn-ghost{background:var(--qx-surface-2);border-color:var(--qx-border);color:var(--qx-text)}
.st-btn-ghost:hover:not(:disabled){background:var(--qx-surface-3);border-color:var(--qx-border-2);color:var(--qx-text)}
.st-btn-danger{background:var(--qx-danger-solid);border-color:var(--qx-danger-solid);color:#fff}
.st-btn-quiet{background:transparent;border-color:var(--qx-border);color:var(--qx-text);min-height:44px;font-size:14px;padding:0 14px}
.st-btn-quiet:hover:not(:disabled){background:var(--qx-surface-2);color:var(--qx-text)}
.st-btn-block{width:100%}
.st-label{display:block;font-size:14px;font-weight:800;color:var(--qx-muted);margin-bottom:6px}
.st-hint{font-size:13px;color:var(--qx-faint);font-weight:600;margin-top:6px;line-height:1.45}
.st-input{width:100%;min-height:50px;padding:0 14px;background:var(--qx-surface-2);border:2px solid var(--qx-border);border-radius:12px;font-size:17px;font-weight:700;color:var(--qx-text)}
.st-input::placeholder{color:var(--qx-faint);font-weight:600}
.st-input:focus{border-color:var(--qx-accent-2)}
.st-input[aria-invalid="true"]{border-color:var(--qx-danger)}
.st-input-code{text-transform:uppercase;letter-spacing:.18em;font-variant-numeric:tabular-nums;font-weight:900;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.st-field{display:flex;flex-direction:column}
.st-field+.st-field{margin-top:14px}
.st-alert{padding:12px 14px;border-radius:12px;border:2px solid var(--qx-danger);background:var(--qx-bg-2);color:var(--qx-text);font-weight:700;font-size:14px;line-height:1.45}
.st-alert:empty{display:none}
.st-alert.is-ok{border-color:var(--qx-success)}
.st-alert.is-info{border-color:var(--qx-info)}
.st-spinner{width:40px;height:40px;border-radius:50%;border:4px solid var(--qx-surface-3);border-top-color:var(--qx-accent-2);animation:st-spin .8s linear infinite;margin:0 auto}
@keyframes st-spin{to{transform:rotate(360deg)}}
.st-state{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;padding:40px 16px}
.st-state h1,.st-state h2{font-size:22px;font-weight:900;line-height:1.25}
.st-state p{color:var(--qx-muted);font-weight:600;max-width:460px}

/* Glyph markers: the answer alphabet, colour-coded per section (decorative). */
.st-glyph{display:inline-grid;place-items:center;width:28px;height:28px;flex:none;border-radius:8px;background:var(--qx-surface-2);border:2px solid var(--qx-border);font-size:13px;line-height:1}
.st-glyph.g1{color:var(--qx-danger)}.st-glyph.g2{color:var(--qx-info)}.st-glyph.g3{color:var(--qx-warning)}.st-glyph.g4{color:var(--qx-success)}.st-glyph.g5{color:var(--qx-accent-text)}

/* Language switch next to dark surfaces */
.st-lang{text-align:center;font-size:12px;color:var(--qx-muted)}

/* ══════════════════════════════════════════════════════════════════
   /elev — sign-up / sign-in
   ══════════════════════════════════════════════════════════════════ */
.sj-main{width:100%;max-width:1080px;margin:0 auto;padding:20px 16px 40px;display:grid;gap:20px;grid-template-columns:minmax(0,1fr);grid-template-areas:"intro" "side" "why" "parents"}
.sj-intro{grid-area:intro}
.sj-side{grid-area:side;display:flex;flex-direction:column;gap:14px;min-width:0}
.sj-why{grid-area:why}
.sj-parents{grid-area:parents}
@media (min-width:900px){
  .sj-main{grid-template-columns:minmax(0,1fr) minmax(0,440px);grid-template-areas:"intro side" "why side" "parents side";grid-template-rows:auto auto 1fr;column-gap:48px;row-gap:24px;padding-top:48px;align-items:start}
}
.sj-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;color:var(--qx-accent-text)}
.sj-glyphs{display:inline-flex;gap:4px;font-size:11px;letter-spacing:0}
.sj-glyphs span:nth-child(1){color:var(--qx-danger)}.sj-glyphs span:nth-child(2){color:var(--qx-info)}.sj-glyphs span:nth-child(3){color:var(--qx-warning)}.sj-glyphs span:nth-child(4){color:var(--qx-success)}
.sj-h1{font-size:clamp(28px,6vw,44px);font-weight:900;letter-spacing:-.02em;line-height:1.1;margin-top:10px}
.sj-sub{font-size:clamp(16px,2vw,19px);font-weight:600;color:var(--qx-muted);margin-top:10px;max-width:560px;line-height:1.5}
.sj-h2{font-size:15px;font-weight:900;margin-bottom:12px}
.sj-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.sj-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;font-weight:700;color:var(--qx-muted);line-height:1.45}
.sj-list .st-glyph{margin-top:-2px}
.sj-note{padding:16px;border-radius:14px;background:var(--qx-bg-2);border:2px solid var(--qx-surface-3);font-size:14px;font-weight:600;color:var(--qx-muted);line-height:1.55}
.sj-note .sj-h2{color:var(--qx-text);margin-bottom:6px}
.sj-card{background:var(--qx-surface);border:2px solid var(--qx-border);border-radius:18px;padding:22px 18px;display:flex;flex-direction:column;gap:16px}
@media (min-width:420px){.sj-card{padding:24px 22px}}
.sj-teacher{text-align:center;font-size:14px;font-weight:700;color:var(--qx-muted)}
.sj-teacher a{font-weight:800}
/* class banner */
.sj-class{display:flex;gap:12px;align-items:center;padding:14px;border-radius:14px;border:2px solid var(--qx-accent-2);background:var(--qx-bg-2)}
.sj-class.is-bad{border-color:var(--qx-danger)}
.sj-class-ico{flex:none;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--qx-accent);color:#fff;font-size:18px}
.sj-class.is-bad .sj-class-ico{background:var(--qx-danger-solid)}
.sj-class-txt{min-width:0;display:flex;flex-direction:column;gap:2px}
.sj-class-intro{font-size:13px;font-weight:800;color:var(--qx-muted)}
.sj-class-name{font-size:19px;font-weight:900;line-height:1.25;overflow-wrap:anywhere}
.sj-class-meta{font-size:13px;font-weight:700;color:var(--qx-faint)}
.sj-class-meta b{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.1em;color:var(--qx-muted)}
/* declaration */
.sj-decl{padding:14px;border-radius:14px;border:2px solid var(--qx-border-2);background:var(--qx-bg-2)}
.sj-decl.is-on{border-color:var(--qx-success)}
.sj-decl.is-err{border-color:var(--qx-danger)}
.sj-check{display:flex;gap:12px;align-items:flex-start;min-height:44px;cursor:pointer;font-size:16px;font-weight:800;line-height:1.4}
.sj-check input{flex:none;width:24px;height:24px;margin-top:1px;accent-color:var(--qx-accent-2);cursor:pointer}
.sj-decl-links{font-size:13px;font-weight:600;color:var(--qx-muted);margin:6px 0 0 36px}
.sj-google{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;min-height:52px;padding:0 16px;border-radius:12px;border:2px solid var(--qx-border-2);background:var(--qx-surface-2);color:var(--qx-text);font-weight:800;font-size:16px}
.sj-google:hover:not(:disabled){background:var(--qx-surface-3)}
.sj-google:disabled{opacity:.5;cursor:not-allowed}
.sj-google svg{flex:none}
.sj-need{font-size:13px;font-weight:700;color:var(--qx-warning);text-align:center;margin-top:-8px}
.sj-or{display:flex;align-items:center;gap:12px;font-size:13px;font-weight:800;color:var(--qx-faint)}
.sj-or::before,.sj-or::after{content:"";flex:1;height:2px;background:var(--qx-surface-3)}
.sj-seg{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;border-radius:12px;background:var(--qx-bg-2);border:2px solid var(--qx-surface-3);margin:0;border-style:solid}
.sj-seg legend{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.sj-seg label{position:relative;display:flex;align-items:center;justify-content:center;min-height:44px;border-radius:9px;font-weight:800;font-size:15px;color:var(--qx-muted);cursor:pointer;text-align:center;padding:0 8px}
.sj-seg input{position:absolute;opacity:0;width:1px;height:1px}
.sj-seg input:checked+span{color:#fff}
.sj-seg label:has(input:checked){background:var(--qx-accent);color:#fff}
.sj-seg label.is-on{background:var(--qx-accent);color:#fff}
.sj-seg label:has(input:focus-visible){outline:3px solid #fff;outline-offset:2px;box-shadow:0 0 0 6px var(--qx-accent)}
.sj-form{display:flex;flex-direction:column}
.sj-form .st-btn{margin-top:18px}
.sj-forgot{align-self:flex-end;margin-top:8px;font-size:14px;font-weight:700;padding:6px 2px}
.sj-in{display:flex;flex-direction:column;gap:12px;text-align:center}
.sj-in h2{font-size:22px;font-weight:900;line-height:1.25;overflow-wrap:anywhere}
.sj-in p{color:var(--qx-muted);font-weight:600}

/* ══════════════════════════════════════════════════════════════════
   /student — the pupil's home
   ══════════════════════════════════════════════════════════════════ */
.sh-main{width:100%;max-width:1120px;margin:0 auto;padding:18px 16px 56px}
.sh-hello{display:flex;flex-direction:column;gap:6px;margin:6px 0 16px}
.sh-hello h1{font-size:clamp(26px,5vw,36px);font-weight:900;letter-spacing:-.02em;line-height:1.15;overflow-wrap:anywhere}
.sh-hello p{font-size:16px;font-weight:700;color:var(--qx-muted)}
.sh-jump{display:flex;gap:8px;overflow-x:auto;margin:0 -16px 16px;padding:2px 16px 6px;scrollbar-width:none}
.sh-jump::-webkit-scrollbar{display:none}
.sh-jump a{flex:none;display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border-radius:10px;border:2px solid var(--qx-surface-3);background:var(--qx-bg-2);color:var(--qx-muted);font-weight:800;font-size:14px;text-decoration:none;white-space:nowrap}
.sh-jump a:hover{border-color:var(--qx-border-2);color:var(--qx-text)}
.sh-jump i{font-style:normal;font-size:11px}
@media (min-width:1000px){.sh-jump{display:none}}
.sh-grid{display:grid;gap:16px;grid-template-columns:minmax(0,1fr)}
.sh-col{display:flex;flex-direction:column;gap:16px;min-width:0}
@media (min-width:1000px){.sh-grid{grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:20px;align-items:start}}
.sh-sec{background:var(--qx-surface);border:2px solid var(--qx-border);border-radius:16px;padding:16px;scroll-margin-top:76px;min-width:0}
@media (min-width:420px){.sh-sec{padding:18px 20px}}
.sh-h2{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:900;line-height:1.2;margin-bottom:14px}
.sh-count{margin-left:auto;font-size:13px;font-weight:900;color:var(--qx-muted);font-variant-numeric:tabular-nums;padding:3px 9px;border-radius:8px;border:2px solid var(--qx-surface-3)}
.sh-empty{padding:18px 14px;border-radius:12px;border:2px dashed var(--qx-surface-3);text-align:center}
.sh-empty b{display:block;font-size:16px;font-weight:800}
.sh-empty span{display:block;font-size:14px;font-weight:600;color:var(--qx-muted);margin-top:4px}
.sh-verify{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center;justify-content:space-between;padding:12px 14px;margin-bottom:16px;border-radius:12px;border:2px solid var(--qx-warning);background:var(--qx-bg-2);font-size:14px;font-weight:700}
.sh-verify span{flex:1 1 260px}
/* to do */
.sh-tasks{list-style:none;display:flex;flex-direction:column;gap:10px}
.sh-task{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;padding:14px 14px 14px 16px;border-radius:14px;border:2px solid var(--qx-border);background:var(--qx-bg-2);border-left-width:6px;border-left-color:var(--qx-accent-2)}
.sh-task.m-homework{border-left-color:var(--qx-info)}
.sh-task.m-survey{border-left-color:var(--qx-success)}
.sh-task.is-soon{border-color:var(--qx-warning);border-left-color:var(--qx-warning)}
@media (min-width:560px){.sh-task{grid-template-columns:minmax(0,1fr) auto;align-items:center}}
.sh-task-title{font-size:17px;font-weight:900;line-height:1.3;overflow-wrap:anywhere}
.sh-meta{display:flex;flex-wrap:wrap;gap:6px 12px;margin-top:6px;font-size:13px;font-weight:700;color:var(--qx-muted)}
.sh-meta>span{display:inline-flex;align-items:center;gap:6px}
.sh-chip{display:inline-flex;align-items:center;padding:2px 8px;border-radius:6px;border:2px solid var(--qx-surface-3);font-size:12px;font-weight:900;color:var(--qx-muted);white-space:nowrap}
.sh-chip.m-test{color:var(--qx-accent-text);border-color:var(--qx-accent-2)}
.sh-chip.m-homework{color:var(--qx-info);border-color:var(--qx-info)}
.sh-chip.m-survey{color:var(--qx-success);border-color:var(--qx-success)}
.sh-chip.is-started{color:var(--qx-warning);border-color:var(--qx-warning)}
.sh-due{font-weight:800;color:var(--qx-text)}
.sh-task.is-soon .sh-due{color:var(--qx-warning)}
.sh-task .st-btn{min-width:140px}
@media (max-width:559px){.sh-task .st-btn{width:100%}}
/* results */
.sh-results{list-style:none;display:flex;flex-direction:column;gap:8px}
.sh-res{display:grid;grid-template-columns:64px minmax(0,1fr);gap:12px;align-items:center;padding:10px 12px 10px 10px;border-radius:14px;border:2px solid var(--qx-surface-3);background:var(--qx-bg-2)}
@media (min-width:560px){.sh-res{grid-template-columns:64px minmax(0,1fr) auto}}
.sh-grade{width:64px;height:64px;border-radius:12px;border:3px solid var(--qx-border);background:var(--qx-surface);display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1;font-variant-numeric:tabular-nums}
.sh-grade b{font-size:23px;font-weight:900}
.sh-grade small{font-size:11px;font-weight:800;color:var(--qx-faint);margin-top:3px}
.sh-grade.g{border-color:var(--qx-success)}.sh-grade.b{border-color:var(--qx-info)}.sh-grade.y{border-color:var(--qx-warning)}.sh-grade.r{border-color:var(--qx-danger)}
.sh-grade.is-wait{border-style:dashed;border-color:var(--qx-border)}
.sh-grade.is-wait b,.sh-grade.is-sent b{font-size:20px;color:var(--qx-muted)}
.sh-grade.is-sent{border-color:var(--qx-success)}
.sh-res-title{font-size:15px;font-weight:900;line-height:1.3;overflow-wrap:anywhere}
.sh-res .sh-meta{margin-top:4px}
.sh-wait{display:inline-flex;align-items:center;gap:6px;color:var(--qx-warning);font-weight:800}
.sh-wait::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}
.sh-res-acts{display:flex;gap:8px;flex-wrap:wrap;grid-column:1/-1}
@media (min-width:560px){.sh-res-acts{grid-column:auto;justify-content:flex-end}}
.sh-res-acts .st-btn{min-height:44px;font-size:14px;padding:0 14px}
@media (max-width:559px){.sh-res-acts .st-btn{flex:1 1 auto}}
.sh-more{margin-top:10px}
/* progress */
.sh-progs{display:flex;flex-direction:column;gap:12px}
.sh-prog{padding:14px;border-radius:14px;border:2px solid var(--qx-surface-3);background:var(--qx-bg-2)}
.sh-prog-head{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:baseline;justify-content:space-between}
.sh-prog-name{font-size:16px;font-weight:900;overflow-wrap:anywhere;min-width:0}
.sh-prog-stats{display:flex;gap:14px;align-items:baseline;font-size:13px;font-weight:700;color:var(--qx-muted)}
.sh-avg{display:inline-flex;align-items:baseline;gap:6px}
.sh-avg b{font-size:24px;font-weight:900;color:var(--qx-text);font-variant-numeric:tabular-nums}
.sh-trend{font-weight:900;white-space:nowrap}
.sh-trend.up{color:var(--qx-success)}.sh-trend.down{color:var(--qx-danger)}.sh-trend.flat{color:var(--qx-faint)}
.sh-chart{display:block;width:100%;max-width:560px;height:auto;margin-top:10px}
.sh-chart .ax{stroke:var(--qx-surface-3);stroke-width:1.5}
.sh-chart .ax-mid{stroke:var(--qx-surface-3);stroke-width:1.5;stroke-dasharray:4 4}
.sh-chart .lbl{fill:var(--qx-faint);font-size:11px;font-weight:700;font-family:var(--qx-font)}
.sh-chart .ln{fill:none;stroke:var(--qx-accent-2);stroke-width:3;stroke-linejoin:round;stroke-linecap:round}
.sh-chart .dt{fill:var(--qx-bg-2);stroke:var(--qx-accent-text);stroke-width:2.5}
.sh-chart .dt-last{fill:var(--qx-accent-text);stroke:var(--qx-accent-text)}
.sh-chart .val{fill:var(--qx-text);font-size:12px;font-weight:900;font-family:var(--qx-font)}
.sh-prog-note{font-size:13px;font-weight:600;color:var(--qx-muted);margin-top:8px}
.sh-details{margin-top:8px}
.sh-details summary{display:inline-flex;align-items:center;min-height:44px;font-size:14px;font-weight:800;color:var(--qx-accent-text);cursor:pointer}
.sh-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:4px}
.sh-table th,.sh-table td{padding:8px 10px;text-align:left;border-bottom:2px solid var(--qx-surface-3)}
.sh-table th{font-size:12px;font-weight:900;color:var(--qx-faint);text-transform:uppercase;letter-spacing:.06em}
.sh-table td:last-child,.sh-table th:last-child{text-align:right;font-variant-numeric:tabular-nums;font-weight:800}
.sh-foot{font-size:12px;font-weight:600;color:var(--qx-faint);margin-top:10px}
/* classes */
.sh-classes{list-style:none;display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.sh-class{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;justify-content:space-between;padding:10px 12px;border-radius:12px;border:2px solid var(--qx-surface-3);background:var(--qx-bg-2)}
.sh-class-name{font-size:15px;font-weight:900;overflow-wrap:anywhere}
.sh-class-since{display:block;font-size:13px;font-weight:600;color:var(--qx-faint)}
.sh-class>div{min-width:0;flex:1 1 160px}
.sh-class.is-archived .sh-class-name{color:var(--qx-muted)}
.sh-join{padding:14px;border-radius:14px;border:2px solid var(--qx-border-2);background:var(--qx-bg-2)}
.sh-join h3{font-size:15px;font-weight:900;margin-bottom:10px}
.sh-join-row{display:flex;gap:8px}
.sh-join-row .st-input{flex:1;min-width:0}
.sh-join-row .st-btn{flex:none;min-width:88px}
.sh-preview{font-size:14px;font-weight:800;margin-top:8px;min-height:20px;color:var(--qx-muted)}
.sh-preview.is-ok{color:var(--qx-success)}
.sh-preview.is-bad{color:var(--qx-danger)}
.sh-preview:empty{display:none}
/* account */
.sh-acc-row{display:flex;gap:8px}
.sh-acc-row .st-input{flex:1;min-width:0}
.sh-acc-row .st-btn{flex:none}
.sh-kv{margin-top:14px;font-size:14px;font-weight:700;color:var(--qx-muted);overflow-wrap:anywhere}
.sh-kv b{display:block;font-size:13px;color:var(--qx-faint);font-weight:800;margin-bottom:2px}
.sh-acc-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.sh-danger{margin-top:16px;border-radius:12px;border:2px solid var(--qx-surface-3);padding:0 14px}
.sh-danger summary{display:flex;align-items:center;min-height:48px;font-weight:800;font-size:15px;color:var(--qx-danger);cursor:pointer}
.sh-danger[open]{border-color:var(--qx-danger);padding-bottom:14px}
.sh-danger p{font-size:14px;font-weight:600;color:var(--qx-muted);margin-bottom:12px;line-height:1.5}
.sh-danger .st-btn{margin-top:14px}
.sh-parents{margin-top:16px;padding:14px;border-radius:12px;background:var(--qx-bg-2);border:2px solid var(--qx-surface-3);font-size:14px;font-weight:600;color:var(--qx-muted);line-height:1.55}
.sh-parents b{display:block;color:var(--qx-text);margin-bottom:4px}

/* ── Sheet (confirmation dialog) + toast, as on the test page ─────── */
.st-sheet{position:fixed;inset:0;z-index:60;background:rgba(10,12,18,.76);display:flex;align-items:flex-end;justify-content:center}
.st-sheet-box{width:100%;max-width:520px;max-height:88vh;max-height:88dvh;overflow-y:auto;background:var(--qx-surface);border-top:2px solid var(--qx-border);border-radius:20px 20px 0 0;padding:20px 18px calc(18px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:12px;animation:st-up .22s cubic-bezier(.2,.8,.2,1)}
@keyframes st-up{from{transform:translateY(24px);opacity:0}to{transform:none;opacity:1}}
@media (min-width:640px){.st-sheet{align-items:center;padding:20px}.st-sheet-box{border:2px solid var(--qx-border);border-radius:20px}}
.st-sheet-box h2{font-size:20px;font-weight:900;line-height:1.25;overflow-wrap:anywhere}
.st-sheet-box p{color:var(--qx-muted);font-weight:600;line-height:1.5}
.st-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px}
.st-row>.st-btn{flex:1 1 160px}
.st-toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:70;width:max-content;max-width:calc(100% - 32px);padding:12px 18px;border-radius:12px;background:var(--qx-surface-3);border:2px solid var(--qx-border-2);font-weight:800;font-size:14px;box-shadow:var(--qx-shadow-md);text-align:center}
.st-toast.is-error{border-color:var(--qx-danger)}