/* =====================================================================================================
   static/css/pages/feedback.css · «Обращения» (ТЗ 1.16): the «Ошибка в уроке?» button and sheet, the support
   form, the student's note about a confirmed finding, the admin pages. Phone first, colours only from tetrad.css.
   ===================================================================================================== */

/* ---------- the button under the lesson bar ---------- */
.fb-bar{display:flex;justify-content:flex-end;margin:0;padding:8px var(--gut) 0}
.fb-btn{text-decoration:none;white-space:nowrap}
.fb-btn .fb-flag{color:var(--pen-ink)}

/* ---------- the sheet ---------- */
.bsheet.fb-under{max-height:min(var(--fb-max),calc(100dvh - var(--kb,0px) - 8px))}
.bsheet.fb-under::backdrop{background:rgba(28,42,74,.2)}
.fb-time{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:8px;align-items:center;max-width:360px}
.fb-shift{min-width:72px;min-height:52px;padding:8px 12px;font-weight:700;white-space:nowrap}
.fb-t{text-align:center;font:800 24px/1 var(--f-head);letter-spacing:.02em;padding:10px 8px}
.fb-sheet .fb-howto{margin:12px 0 0}
.fb-cats{margin:14px 0 4px;gap:8px}
.fb-cats .rchip>span{padding:8px 14px;font-size:16px}
.fb-sheet .field{margin-top:12px}
.fb-sheet .textarea{min-height:96px}
.fb-sheet .field-error{margin:8px 0 0}
.fb-hp{display:none}
.fb-done{padding:6px 0 0}
.fb-done:focus{outline:none}
.fb-done-t{display:flex;align-items:center;gap:12px;margin:6px 0 10px;font:700 19px/1.35 var(--f-text);color:var(--ink)}
.fb-done-t .mark{flex:none}
.fb-done-s{margin:0 0 8px;color:var(--ink-2)}

/* ---------- the support form (/pomosh, /pomosh/napisat) ---------- */
.fbp{padding-top:12px;padding-bottom:24px}
.fbs{max-width:680px}
.fbs-lead{margin:0 0 14px;color:var(--ink-2)}
.fbs-topics{margin:0 0 10px}
.fbs-topics legend{margin-bottom:8px}
.fbs-where{display:grid;grid-template-columns:minmax(0,1fr) 96px;gap:0 12px;align-items:end}
.fbs .howto{margin:14px 0 0}
.fbp-done{max-width:680px}

/* ---------- the student's note «находка подтвердилась» ---------- */
.fbn{max-width:none;margin:0 0 18px}
.fbn-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.fbn-list li{display:grid;gap:2px}
.fbn-t{font-weight:700;font-size:17px;line-height:1.4}
.fbn-c{font-size:16px;color:var(--ink-2)}
.fbn-form{margin-top:10px}

/* ---------- admin: the list ---------- */
.fba-tabs{margin-bottom:10px}
.fba-chips{margin-bottom:12px}
.fba-tabs .chip[aria-current="page"] .chip-n,.fba-chips .chip[aria-current="page"] .chip-n{color:var(--ink)}
.fba-more{margin:4px 0 14px;max-width:720px}
.fba-more>summary{min-height:52px;font:600 16px/1.3 var(--f-text)}
.fba-filter{display:grid;gap:0 12px;padding-left:0}
.fba-list{list-style:none;margin:0;padding:0;display:grid;gap:10px;max-width:860px}
.fba-item{display:grid;gap:4px;padding:12px 14px;background:var(--sheet);border-radius:8px;box-shadow:var(--sh-1);color:var(--ink);text-decoration:none}
a.fba-item:hover{background:var(--marker-soft);color:var(--ink)}
.fba-top{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px}
.fba-cat{font-weight:700}
.fba-where{font-size:16px}
.fba-where b{font:800 17px/1 var(--f-head)}
.fba-text{overflow-wrap:anywhere}
.fba-beat{font-size:16px;color:var(--ink-2);border-left:3px solid var(--line-2);padding-left:10px;overflow-wrap:anywhere}
.fba-meta{font-size:16px;color:var(--pencil)}
.fba-task .fba-where a{display:inline-block;padding:10px 0;margin:-10px 0}
.fba-export{margin:16px 0 10px}
.adm-st-confirmed{background:var(--blue-soft);color:var(--blue)}
.adm-st-duplicate{background:var(--paper-lo);color:var(--ink-2)}

/* ---------- admin: lessons with the most messages ---------- */
.ci-math{--sp:var(--math)}
.ci-fiz{--sp:var(--fiz)}
.ci-him{--sp:var(--him)}
.fba-groups{list-style:none;margin:0;padding:0;display:grid;gap:8px;max-width:860px}
.fba-group{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;min-height:64px;
  padding:10px 12px 10px 20px;background:var(--sheet);border-radius:4px 10px 10px 4px;box-shadow:var(--sh-1);color:var(--ink);text-decoration:none}
.fba-group::before{content:"";position:absolute;left:0;top:0;bottom:0;width:8px;border-radius:4px 0 0 4px;background:var(--sp)}
.fba-group:hover{background:var(--marker-soft);color:var(--ink)}
.fba-group-n{min-width:40px;font:800 26px/1 var(--f-head);text-align:center}
.fba-group-b{display:grid;gap:2px;min-width:0}
.fba-group-t{font-weight:700}
.fba-group-s{font-size:16px;color:var(--ink-2)}
.fba-group-c{display:flex;flex-wrap:wrap;gap:2px 12px;font-size:16px}

/* ---------- admin: the card ---------- */
.fba-back{margin:0 0 6px}
.fba-back a{display:inline-flex;align-items:center;gap:6px;min-height:44px;font-size:16px}
.fba h1 .adm-st{vertical-align:middle;margin-left:6px}
.fba-cols{display:grid;gap:14px;align-items:start}
.fba-main,.fba-side{display:grid;gap:14px;min-width:0}
.fba-sec .kick{margin-bottom:4px}
.fba-sec h2{margin-bottom:10px}
.fba-lesson{margin:0 0 10px;font-weight:700}
.fba-quote{white-space:pre-line;overflow-wrap:anywhere}
.fba-open{margin:0}
.fba-scene{margin:0 0 10px;overflow-wrap:anywhere}
.fba-lines{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.fba-line{display:grid;grid-template-columns:52px minmax(0,1fr);gap:10px;padding:8px 10px;border-radius:8px}
.fba-line.is-cur{background:var(--marker-soft);box-shadow:inset 3px 0 0 var(--pen)}
.fba-line-t{font:700 16px/1.4 var(--f-head)}
.fba-line-b{display:grid;gap:2px;overflow-wrap:anywhere}
.fba-line-b small{font-size:16px;color:var(--ink-2)}
.fba-files{margin:12px 0 0;color:var(--ink-2);overflow-wrap:anywhere}
.fba-files code{font-size:15px}
.fba-sim{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.fba-sim li{display:grid;gap:2px}
.fba-sim a{display:inline-flex;align-items:center;min-height:44px}
.fba-facts{list-style:none;margin:0;padding:0;display:grid;gap:8px;overflow-wrap:anywhere}
.fba-facts a{display:inline-block;padding:10px 0;margin:-10px 0}
.fba-act .howto{margin:12px 0 0}
.fba-btns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:14px}
.fba-btns .btn.is-now{border-color:var(--ink);background:var(--paper-lo)}
.fba-btns2{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}

/* ---------- tablet ---------- */
@media (min-width:600px){
  .fb-bar{padding:10px 0 0}
  .fba-filter{grid-template-columns:minmax(0,2fr) 110px minmax(0,1.5fr) auto;align-items:end}
  .fba-filter .form-acts{margin:0 0 18px}
}

/* ---------- desktop ---------- */
@media (min-width:1024px){
  .fba-cols{grid-template-columns:minmax(0,1.5fr) minmax(320px,1fr)}
  .fba-side{position:sticky;top:calc(var(--hdr-h, 64px) + 16px)}
}