:root{
  --navy:#16354f; --navy-lite:#22506f;
  --blue:#1f6fb2; --blue-dark:#175a92; --blue-soft:#e8f1f9;
  --ok:#2e7d32; --ok-bg:#e6f4e6; --ok-brd:#a8d5a8;
  --bad:#c62828; --bad-bg:#fdecec; --bad-brd:#f0b4b4;
  --amber:#b8860b; --amber-bg:#fdf5e0;
  --ink:#1e2732; --ink2:#4a5765; --muted:#7a8794;
  --line:#d6dde4; --bg:#eef1f5; --panel:#fff;
  --fs:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg); color:var(--ink); font-size:var(--fs); line-height:1.55;
}
.hidden{display:none !important}
button{font-family:inherit;font-size:14px;cursor:pointer}
code{background:#eef1f5;padding:1px 5px;border-radius:3px;font-size:.9em}

/* ---------------- top nav ---------------- */
.topnav{
  background:var(--navy); color:#fff; display:flex; align-items:center; gap:24px;
  padding:0 20px; height:54px; position:sticky; top:0; z-index:20;
}
.brand{font-weight:700;font-size:19px;letter-spacing:.5px}
.brand span{color:#7fc3f5;font-weight:400}
.topnav nav{display:flex;gap:4px;flex:1}
.navbtn{
  background:transparent;border:0;color:#cfe0ee;padding:8px 14px;border-radius:5px;
}
.navbtn:hover{background:rgba(255,255,255,.1);color:#fff}
.navbtn.active{background:var(--blue);color:#fff}
.brandmeta{font-size:12px;color:#9fc0d8;white-space:nowrap}

main{max-width:1180px;margin:0 auto;padding:22px 20px 60px}

/* ---------------- panels ---------------- */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:20px;margin-bottom:18px}
.panel h2{margin:0 0 6px;font-size:17px}
.panel h3{margin:0 0 8px;font-size:13px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted)}
.panelhead{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.panelhead h2{margin:0}
.panelgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.muted{color:var(--muted);font-size:14px}
.msg{margin-top:10px;font-size:14px;color:var(--bad)}
.msg.ok{color:var(--ok)}

.statrow{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:18px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:14px 16px}
.stat .v{font-size:26px;font-weight:700;line-height:1.1}
.stat .k{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-top:4px}
.stat.good .v{color:var(--ok)} .stat.warn .v{color:var(--bad)}

/* ---------------- buttons / forms ---------------- */
.btn{background:#f3f5f8;border:1px solid var(--line);color:var(--ink);padding:8px 15px;border-radius:5px}
.btn:hover{background:#e8ecf1}
.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.primary:hover{background:var(--blue-dark)}
.btn.big{width:100%;padding:11px;font-size:15px;margin-top:12px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.quickrow{display:flex;gap:10px;margin:12px 0}
.check{display:flex;align-items:center;gap:8px;font-size:14px;margin-top:8px;cursor:pointer}
.field{display:block;font-size:13px;color:var(--ink2);margin-bottom:12px}
.field input,.field select{
  display:block;width:100%;margin-top:5px;padding:8px 10px;border:1px solid var(--line);
  border-radius:5px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink)
}
.formgrid{display:grid;grid-template-columns:1fr 1fr 300px;gap:22px}
.formgrid4{display:grid;grid-template-columns:1fr 1.15fr 1.35fr 280px;gap:18px}
.grouprow{display:flex;gap:8px;flex-wrap:wrap}
.chip{background:#eef2f6;border:1px solid var(--line);border-radius:14px;padding:4px 12px;
  font-size:13px;color:var(--ink2)}
.chip:hover{background:var(--blue-soft);border-color:#a9cbe6}
.chip.on{background:var(--blue);border-color:var(--blue);color:#fff}
.pickmeta{font-weight:400;color:var(--muted);text-transform:none;letter-spacing:0;font-size:12px;
  white-space:nowrap}
.pickhint{color:var(--muted);font-size:13px;margin:6px 4px}
.pickbox .grp{font-size:11px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);
  padding:8px 6px 3px;border-top:1px solid var(--line);margin-top:4px}
.pickbox .grp:first-child{border-top:0;margin-top:0}
.pickbox label.dim{opacity:.45}
.selsummary{background:#f7f9fb;border:1px solid var(--line);border-radius:6px;
  padding:9px 13px;margin-bottom:14px;font-size:13.5px;color:var(--ink2)}
.selsummary b{color:var(--ink)}
.selsummary .mockbadge{background:#2b7a4b;color:#fff;font-size:11px;padding:2px 8px;
  border-radius:10px;margin-right:8px}
.pickbox{max-height:330px;overflow-y:auto;border:1px solid var(--line);border-radius:6px;padding:8px}
.pickbox label{display:flex;align-items:center;gap:8px;padding:5px 6px;border-radius:4px;font-size:14px;cursor:pointer}
.pickbox label:hover{background:var(--blue-soft)}
.pickbox .n{margin-left:auto;color:var(--muted);font-size:12px}

/* ---------------- lists ---------------- */
.testlist,.sourcelist,.resitems,.results{max-height:340px;overflow-y:auto}
.trow{display:flex;align-items:center;gap:12px;padding:9px 4px;border-bottom:1px solid var(--line);font-size:14px}
.trow:last-child{border-bottom:0}
.trow .grow{flex:1}
.trow .pct{font-weight:700;min-width:52px;text-align:right}
.sourcelist .srow{display:flex;gap:10px;padding:6px 4px;font-size:13px;border-bottom:1px solid var(--line)}
.sourcelist .srow:last-child{border:0}
.tag{font-size:11px;padding:1px 7px;border-radius:10px;background:#e9eef3;color:var(--ink2);white-space:nowrap}
.tag.qbank{background:var(--blue-soft);color:var(--blue-dark)}
.tag.ai{background:var(--amber-bg);color:var(--amber)}
.tag.recovered{background:#e6f0ff;color:#2456b8;cursor:help}

.bar{height:7px;background:#e9edf1;border-radius:4px;overflow:hidden;min-width:110px;flex:1}
.bar i{display:block;height:100%;background:var(--blue)}
.bar i.low{background:var(--bad)} .bar i.high{background:var(--ok)}

/* ---------------- search ---------------- */
.searchrow{display:flex;gap:10px;margin-bottom:14px}
.searchrow input{flex:1;padding:9px 12px;border:1px solid var(--line);border-radius:5px;font-size:15px;font-family:inherit}
.searchrow select{padding:9px;border:1px solid var(--line);border-radius:5px;font-family:inherit}
.rescard{border:1px solid var(--line);border-radius:6px;padding:12px;margin-bottom:10px;cursor:pointer;background:#fff}
.rescard:hover{border-color:var(--blue);background:var(--blue-soft)}
.rescard .meta{font-size:12px;color:var(--muted);margin-bottom:5px;display:flex;gap:8px;flex-wrap:wrap}
.rescard .snip{font-size:13px;color:var(--ink2);white-space:pre-wrap;max-height:120px;overflow:hidden}

/* ================= RUNNER ================= */
#runner{display:flex;flex-direction:column;height:100vh}
.rbar{
  background:var(--navy);color:#fff;display:flex;align-items:center;gap:16px;
  padding:0 16px;height:48px;flex-shrink:0
}
.rleft,.rright{display:flex;align-items:center;gap:12px}
.rmid{flex:1;text-align:center;font-size:13px;color:#9fc0d8}
.ritem{font-size:14px}
.rmark{display:flex;align-items:center;gap:6px;font-size:13px;color:#cfe0ee;cursor:pointer}
.rtimer{font-variant-numeric:tabular-nums;font-size:15px;font-weight:600;color:#ffd97d}
.osym{background:#2b7a4b;color:#fff;font-size:11px;padding:2px 8px;border-radius:10px;
  margin-left:8px;white-space:nowrap;letter-spacing:.3px}
.lowconf{display:inline-block;width:15px;height:15px;line-height:15px;text-align:center;
  border-radius:50%;background:#b8860b;color:#fff;font-size:10px;font-weight:700;
  margin-left:6px;cursor:help}
.rmid{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding:0 10px}
.rbtn{background:rgba(255,255,255,.12);border:0;color:#fff;padding:6px 12px;border-radius:4px}
.rbtn:hover{background:rgba(255,255,255,.22)}
.rbtn.danger{background:#a33; }
.rbtn.danger:hover{background:#c44}

.rbody{flex:1;display:flex;min-height:0}
.rmain{flex:1;overflow-y:auto;background:#fff}
.qwrap{max-width:900px;margin:0 auto;padding:26px 30px 60px}
.vignette{
  background:#f7f9fb;border-left:3px solid var(--blue);padding:14px 16px;
  margin-bottom:16px;white-space:pre-wrap;font-size:15.5px;line-height:1.65
}
.vignette:empty{display:none}
.stem{font-size:16.5px;line-height:1.7;white-space:pre-wrap;margin-bottom:20px}

.options{display:flex;flex-direction:column;gap:9px}
.opt{
  display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);
  border-radius:6px;padding:11px 14px;cursor:pointer;background:#fff;
  /* long-press crosses an option out; without this iOS pops its own
     Copy / Look Up menu over the top of the gesture instead */
  -webkit-touch-callout:none;-webkit-user-select:none;user-select:none;
}
.opt:hover{background:var(--blue-soft);border-color:#a9cbe6}
.opt .letter{
  width:26px;height:26px;border-radius:50%;border:1.5px solid var(--muted);
  display:flex;align-items:center;justify-content:center;font-weight:600;font-size:13px;
  flex-shrink:0;color:var(--ink2)
}
.opt .txt{flex:1;line-height:1.55}
.opt.sel{border-color:var(--blue);background:var(--blue-soft)}
.opt.sel .letter{background:var(--blue);border-color:var(--blue);color:#fff}
.opt.crossed .txt{text-decoration:line-through;opacity:.45}
.opt.correct{background:var(--ok-bg);border-color:var(--ok-brd)}
.opt.correct .letter{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{background:var(--bad-bg);border-color:var(--bad-brd)}
.opt.wrong .letter{background:var(--bad);border-color:var(--bad);color:#fff}
.opt.locked{cursor:default}
.opt .mk{margin-left:auto;font-weight:700}
.opt.correct .mk{color:var(--ok)} .opt.wrong .mk{color:var(--bad)}

.submitrow{margin-top:20px;display:flex;align-items:center;gap:14px}
.hint{font-size:12px;color:var(--muted)}

/* explanation */
.explain{margin-top:28px;border-top:2px solid var(--line);padding-top:18px}
.ansbar{display:flex;gap:26px;background:#f7f9fb;border:1px solid var(--line);
  border-radius:6px;padding:12px 16px;margin-bottom:16px;flex-wrap:wrap}
.ansblock{display:flex;flex-direction:column}
.ansblock.grow{flex:1;min-width:180px}
.anslabel{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}
.ansletter{font-size:21px;font-weight:700}
.ansval{font-size:15px;font-weight:600}
.ansval.small{font-size:12px;font-weight:400;color:var(--ink2);word-break:break-word}

.tabs{display:flex;gap:2px;border-bottom:2px solid var(--line);margin-bottom:14px;flex-wrap:wrap}
.tab{background:transparent;border:0;padding:9px 15px;color:var(--ink2);border-bottom:2px solid transparent;margin-bottom:-2px}
.tab:hover{color:var(--blue)}
.tab.active{color:var(--blue);border-bottom-color:var(--blue);font-weight:600}
.tabpane{min-height:60px}
.tabpane textarea{width:100%;min-height:150px;padding:11px;border:1px solid var(--line);
  border-radius:6px;font-family:inherit;font-size:14px;margin-bottom:10px}
.rawexpl{white-space:pre-wrap;font-size:14.5px;line-height:1.65;color:var(--ink2);
  background:#fafbfc;border:1px solid var(--line);border-radius:6px;padding:14px}

.markdown{font-size:15px;line-height:1.7;margin-top:14px}
.markdown h2{font-size:15px;margin:20px 0 6px;color:var(--blue-dark);
  border-bottom:1px solid var(--line);padding-bottom:4px}
.markdown h3{font-size:14px;margin:14px 0 4px}
.markdown ul{margin:6px 0 6px 20px;padding:0}
.markdown li{margin:3px 0}
.markdown p{margin:8px 0}
.markdown strong{color:var(--ink)}
.markdown code{background:#eef1f5}

/* navigator */
.rnav{width:230px;background:#f4f6f9;border-left:1px solid var(--line);
  display:flex;flex-direction:column;flex-shrink:0}
.rnavhead{padding:10px 14px;font-size:12px;text-transform:uppercase;letter-spacing:.6px;
  color:var(--muted);border-bottom:1px solid var(--line)}
.rnavgrid{flex:1;overflow-y:auto;padding:12px;display:grid;
  grid-template-columns:repeat(5,1fr);gap:6px;align-content:start}
.gcell{aspect-ratio:1;border:1px solid var(--line);border-radius:4px;background:#fff;
  font-size:12px;display:flex;align-items:center;justify-content:center;position:relative}
.gcell:hover{border-color:var(--blue)}
.gcell.cur{outline:2px solid var(--blue);outline-offset:-2px;font-weight:700}
.gcell.ok{background:var(--ok-bg);border-color:var(--ok-brd)}
.gcell.bad{background:var(--bad-bg);border-color:var(--bad-brd)}
.gcell.seen{background:#e7ecf1}
.gcell.mark::after{content:"";position:absolute;top:2px;right:2px;width:6px;height:6px;
  border-radius:50%;background:var(--amber)}
.rnavlegend{padding:10px 14px;border-top:1px solid var(--line);display:flex;
  flex-direction:column;gap:5px;font-size:12px;color:var(--ink2)}
.rnavlegend span{display:flex;align-items:center;gap:7px}
.dot{width:10px;height:10px;border-radius:3px;display:inline-block}
.dot.ok{background:var(--ok-bg);border:1px solid var(--ok-brd)}
.dot.bad{background:var(--bad-bg);border:1px solid var(--bad-brd)}
.dot.seen{background:#e7ecf1;border:1px solid var(--line)}
.dot.mark{background:var(--amber)}

.rfoot{background:var(--navy);display:flex;align-items:center;gap:18px;padding:0 16px;
  height:46px;flex-shrink:0}
.rprog{flex:1;height:6px;background:rgba(255,255,255,.18);border-radius:3px;overflow:hidden}
.rprog>div{height:100%;background:#7fc3f5;width:0}

/* related content cards */
.relcard{border:1px solid var(--line);border-radius:6px;padding:12px;margin-bottom:10px;background:#fafbfc}
.relcard .h{font-size:12px;color:var(--muted);margin-bottom:6px}
.relcard .b{font-size:14px;white-space:pre-wrap;max-height:220px;overflow-y:auto}

/* results */
.resitems .rrow{display:flex;align-items:center;gap:12px;padding:8px 4px;
  border-bottom:1px solid var(--line);font-size:14px}
.resitems .rrow:last-child{border:0}
.badge{width:22px;height:22px;border-radius:4px;display:flex;align-items:center;
  justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.badge.ok{background:var(--ok-bg);color:var(--ok)}
.badge.bad{background:var(--bad-bg);color:var(--bad)}
.badge.skip{background:#e7ecf1;color:var(--muted)}

/* modal */
.modal{position:fixed;inset:0;background:rgba(10,20,30,.88);z-index:100;
  display:flex;flex-direction:column}
.modalbar{display:flex;justify-content:space-between;align-items:center;
  padding:10px 16px;color:#fff;font-size:13px;background:var(--navy)}
.modalbody{flex:1;overflow:auto;display:flex;justify-content:center;padding:16px}
.modalbody img{max-width:100%;height:auto;align-self:flex-start;background:#fff;
  box-shadow:0 4px 24px rgba(0,0,0,.5)}

/* highlighter */
mark.hl{background:#ffe9a3;color:inherit;padding:1px 0;border-radius:2px;cursor:pointer;
  box-shadow:inset 0 -2px 0 #f0c93f}
mark.hl:hover{background:#ffd76b}
.hlbtn{position:fixed;z-index:150;transform:translateX(-50%);background:var(--navy);
  color:#fff;border:0;padding:6px 14px;border-radius:5px;font-size:13px;
  box-shadow:0 3px 12px rgba(0,0,0,.3);white-space:nowrap}
.hlbtn:hover{background:var(--blue)}
.hlbtn::after{content:"";position:absolute;top:100%;left:50%;transform:translateX(-50%);
  border:6px solid transparent;border-top-color:var(--navy)}
.hlbtn:hover::after{border-top-color:var(--blue)}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);
  background:var(--navy);color:#fff;padding:11px 20px;border-radius:6px;font-size:14px;
  z-index:200;box-shadow:0 6px 20px rgba(0,0,0,.28)}

.spinner{display:inline-block;width:14px;height:14px;border:2px solid rgba(0,0,0,.15);
  border-top-color:var(--blue);border-radius:50%;animation:spin .7s linear infinite;
  vertical-align:-2px;margin-right:7px}
@keyframes spin{to{transform:rotate(360deg)}}

@media (max-width:900px){
  .panelgrid,.formgrid{grid-template-columns:1fr}
  .rnav{display:none}
}
.uncnote{margin-top:7px;padding-top:7px;border-top:1px dashed var(--line);
  font-size:12.5px;color:var(--muted)}

/* ================= AI tutor (step-by-step solver) ================= */
.rbtn.solve{background:#2b7a4b}
.rbtn.solve:hover{background:#35935a}
.rbtn.solve:disabled{opacity:.6;cursor:progress}

mark.hl.ai{background:#bfe6f5;box-shadow:inset 0 -2px 0 #5fb4d6}
mark.hl.ai:hover{background:#9fd9ef}

.tutor{width:420px;flex-shrink:0;background:#fff;border-left:1px solid var(--line);
  display:flex;flex-direction:column;min-height:0}
.tutorhead{display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:var(--navy);color:#fff;padding:9px 14px;font-size:14px;font-weight:600}
.tutorprog{height:4px;background:#e9edf1;flex-shrink:0}
.tutorprog>div{height:100%;background:#2b7a4b;width:0;transition:width .2s}
.tutorbody{flex:1;overflow-y:auto;padding:16px 18px}
.tutorfoot{display:flex;align-items:center;gap:10px;padding:10px 14px;
  border-top:1px solid var(--line);background:#f7f9fb}
.tutorcount{flex:1;text-align:center;font-size:12px;color:var(--muted)}

.tstep{animation:tfade .18s ease}
@keyframes tfade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.tstep .kicker{font-size:11px;text-transform:uppercase;letter-spacing:.7px;
  color:var(--muted);margin-bottom:6px}
.tstep h3{margin:0 0 10px;font-size:16px;line-height:1.4;color:var(--ink)}
.tstep .body{font-size:15px;line-height:1.72;white-space:pre-wrap;color:var(--ink2)}
.tstep.optbox{border-left:4px solid var(--bad-brd);background:var(--bad-bg);
  padding:14px 16px;border-radius:6px}
.tstep.optbox.ok{border-left-color:var(--ok-brd);background:var(--ok-bg)}
.tstep .optletter{display:inline-flex;width:28px;height:28px;border-radius:50%;
  align-items:center;justify-content:center;font-weight:700;font-size:14px;
  background:var(--bad);color:#fff;margin-right:9px;vertical-align:-6px}
.tstep.optbox.ok .optletter{background:var(--ok)}
.tstep .verdict{font-size:12px;font-weight:700;text-transform:uppercase;
  letter-spacing:.5px;color:var(--bad)}
.tstep.optbox.ok .verdict{color:var(--ok)}
.tutornote{margin-top:16px;padding-top:12px;border-top:1px dashed var(--line);
  font-size:12.5px;color:var(--muted)}
.tutorwait{display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:100%;gap:10px;color:var(--muted);font-size:14px;text-align:center;padding:20px}
@media (max-width:1200px){.tutor{width:360px}}
.tutornote.conflict{color:var(--bad);border-top-color:var(--bad-brd)}

/* ---------------- TUS prediction ---------------- */
/* Violet distinguishes prediction from the green "solve" action: one teaches the
   question in front of you, the other reasons across the whole exam history. */
.rbtn.predict{background:#6b3fa0}
.rbtn.predict:hover{background:#7f4dbb}
.rbtn.predict:disabled{opacity:.6;cursor:progress}
.btn.predict{background:#6b3fa0;border-color:#6b3fa0;color:#fff}
.btn.predict:hover{background:#7f4dbb}

.predhead{display:flex;align-items:center;gap:16px;margin-bottom:18px}
.predtitle{flex:1;min-width:0}
.predtitle h2{margin:0;font-size:20px}
.predactions{display:flex;gap:8px}

.predbar{height:6px;background:var(--line);border-radius:3px;overflow:hidden;margin:10px 0 12px}
#pred-barfill{height:100%;width:2%;background:#6b3fa0;transition:width .5s ease}

.predgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px}
.predcard{display:flex;flex-direction:column;gap:2px;padding:16px}
.predk{font-size:26px;font-weight:700;color:#6b3fa0;line-height:1.1}
.predl{font-size:13px;color:var(--muted)}

.predq{border:1px solid var(--line);border-radius:8px;margin-bottom:18px;overflow:hidden}
.predq > header{display:flex;align-items:flex-start;gap:10px;padding:14px 16px;background:#f7f4fb;border-bottom:1px solid var(--line)}
.predrank{background:#6b3fa0;color:#fff;width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex:none}
.predq h4{margin:0;font-size:16px;flex:1}
.lik{font-size:11px;font-weight:700;padding:2px 9px;border-radius:10px;text-transform:uppercase;letter-spacing:.4px;flex:none}
.lik.yuksek{background:var(--bad-bg);color:var(--bad)}
.lik.orta{background:var(--amber-bg);color:var(--amber)}
.lik.dusuk{background:#eef1f5;color:var(--ink2)}
.predbody{padding:16px}
.predsec{margin-bottom:12px}
.predsec b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);margin-bottom:3px}

/* the practice question attached to each prediction */
.predtry{border-top:1px dashed var(--line);margin-top:14px;padding-top:14px}
.predtry .stem{margin-bottom:10px;white-space:pre-wrap}
.popt{display:flex;gap:9px;align-items:flex-start;border:1px solid var(--line);
  border-radius:6px;padding:9px 12px;margin-bottom:6px;cursor:pointer;background:#fff}
.popt:hover{border-color:var(--blue);background:var(--blue-soft)}
.popt.picked{border-color:var(--blue);background:var(--blue-soft)}
.popt.correct{border-color:var(--ok-brd);background:var(--ok-bg)}
.popt.wrong{border-color:var(--bad-brd);background:var(--bad-bg)}
.popt .l{font-weight:700;flex:none;width:16px}
.predans{margin-top:10px;padding:12px;border-radius:6px;background:var(--blue-soft);font-size:14px}

.predtable{width:100%;border-collapse:collapse;font-size:14px}
.predtable th,.predtable td{text-align:left;padding:7px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.predtable th{font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
.st{font-size:11px;font-weight:700;padding:2px 8px;border-radius:9px;white-space:nowrap}
.st.sorulmus{background:var(--ok-bg);color:var(--ok)}
.st.kismen{background:var(--amber-bg);color:var(--amber)}
.st.sorulmamis{background:var(--bad-bg);color:var(--bad)}
.tablewrap{overflow-x:auto}

.patt{border-left:3px solid #6b3fa0;padding:2px 0 2px 14px;margin-bottom:16px}
.patt h4{margin:0 0 4px;font-size:15px}
.predmd{white-space:pre-wrap;line-height:1.65}
.archrow{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.archrow .grow{flex:1;min-width:0}

/* ---------------- OCR repair ---------------- */
.rbtn.ocrfix{background:#8a5a12}
.rbtn.ocrfix:hover{background:#a86e18}
.rbtn.ocrfix:disabled{opacity:.6;cursor:progress}

.ocrbar{border:1px solid #e3d3ac;background:#fdf8ec;border-radius:8px;
  padding:12px 14px;margin-bottom:16px;font-size:14px}
.ocrbar .ocrhead{display:flex;align-items:center;gap:10px;margin-bottom:8px;flex-wrap:wrap}
.ocrbar .ocrhead b{font-size:14px}
.ocrbar .conf{font-size:11px;font-weight:700;padding:2px 8px;border-radius:10px;text-transform:uppercase}
.conf.yuksek{background:var(--ok-bg);color:var(--ok)}
.conf.orta{background:var(--amber-bg);color:var(--amber)}
.conf.dusuk{background:var(--bad-bg);color:var(--bad)}
.ocrbar .grow{flex:1}
.ocrdiff{width:100%;border-collapse:collapse;font-size:13.5px;margin-top:4px}
.ocrdiff th,.ocrdiff td{text-align:left;padding:6px 9px;border-bottom:1px solid #ece0c4;vertical-align:top}
.ocrdiff th{font-size:11px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);white-space:nowrap}
.ocrdiff td.was{color:var(--bad);text-decoration:line-through;text-decoration-color:#d9a8a8}
.ocrdiff td.now{color:var(--ok);font-weight:600}
.ocrdiff td.fld{font-weight:700;white-space:nowrap}
.ocrnote{margin-top:8px;color:var(--ink2);font-size:13px}
.ocrbar .keychg{background:var(--bad-bg);color:var(--bad);font-size:11px;font-weight:700;
  padding:2px 8px;border-radius:10px}
.btn.trim{background:#f0ece2;border-color:#ddd3bd;color:#7a5c14}
.btn.trim:hover{background:#e6dfcd}

/* ---- AI Açıklaması: topic brief + TUS exam window ---------------------- */
.aisec{margin:26px 0 10px;padding-top:16px;border-top:2px solid var(--line);
  font-size:13px;text-transform:uppercase;letter-spacing:.6px;color:var(--blue)}
/* md() shifts heading levels by one, so the brief's "### " arrives as h4. */
#ai-topic-out .markdown h3,
#ai-topic-out .markdown h4{font-size:14px;margin:16px 0 6px;color:var(--ink)}
#ai-topic-out .markdown ul{margin:6px 0 10px;padding-left:20px}
#ai-topic-out .markdown li{margin:3px 0;line-height:1.5}
.aiwait{color:var(--muted);font-size:14px;padding:14px 0;display:flex;align-items:center;gap:8px}

.chainlist{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.chainrow{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;
  background:#f7f9fb;border:1px solid var(--line);border-radius:6px}
.chyear{flex:0 0 108px;font-size:12px;font-weight:600;color:var(--blue);padding-top:2px}
.chbody{flex:1;min-width:0}
.chain{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.chnode{background:#fff;border:1px solid var(--line);border-radius:4px;
  padding:2px 8px;font-size:13px;line-height:1.4}
.charr{color:var(--blue);font-weight:700;font-size:14px}
.chkey{margin-top:6px;font-size:13px;color:var(--ink2);line-height:1.5}
@media(max-width:760px){
  .chainrow{flex-direction:column;gap:6px}
  .chyear{flex:none}
}
.chainflag{margin-top:12px;padding:10px 13px;background:var(--amber-bg);
  border:1px solid #e5cf9a;border-radius:6px;font-size:13px;color:var(--ink2)}
.chainflag ul{margin:6px 0 0;padding-left:20px}
.chainflag li{margin:2px 0}
.aicaveat{font-size:12.5px;color:var(--muted);background:#f7f9fb;border-left:3px solid var(--line);
  padding:7px 11px;margin:0 0 12px;border-radius:0 4px 4px 0;line-height:1.45}

/* ---- sesli okuma ------------------------------------------------------- */
.aihead{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.speakbar{display:flex;align-items:center;gap:8px}
.btn.spk{padding:6px 11px;font-size:13px;background:var(--blue-soft);
  border-color:#bcd8ee;color:var(--blue-dark)}
.btn.spk:hover{background:#d8e8f5}
.btn.spk.on{background:var(--blue);border-color:var(--blue);color:#fff}
.spkeng{font-family:inherit;font-size:12.5px;padding:5px 6px;border:1px solid var(--line);
  border-radius:5px;background:#fff;color:var(--ink2);cursor:pointer}
#speak-rate{width:96px;accent-color:var(--blue);cursor:pointer}
.spkval{font-size:12.5px;color:var(--ink2);min-width:36px;font-variant-numeric:tabular-nums}
/* The box-shadow pads the highlight out to the text without shifting layout. */
.speaking,.chainrow.speaking{background:var(--amber-bg);border-radius:3px;
  box-shadow:0 0 0 3px var(--amber-bg)}

/* ================= telefon / tablet ====================================
   Two breakpoints, and they are not interchangeable:

   900px  -- where the desktop rail (.rnav) already hid itself. Below this the
             question grid has to come back as a bottom sheet, or an iPad in
             portrait has no way to see which questions are answered at all.
   640px  -- an actual phone: compact spacing, thumb-sized targets, a scrolling
             header, and a fullscreen tutor. */
.phoneonly{display:none}
.navclose{display:none}

@media (max-width:900px){
  .phoneonly{display:inline-flex}

  /* The extra "Sorular" button pushes the header past the edge on an iPad, so
     the bar scrolls from here down, not just on phones. */
  .rbar{gap:10px;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch}
  .rbar::-webkit-scrollbar{display:none}
  .rleft,.rright{flex-shrink:0}
  .rmid{min-width:0}

  /* question grid becomes a bottom sheet, opened from the header.
     width:auto is load-bearing: the desktop rail sets width:230px, and on a
     fixed element that beats left:0/right:0, leaving the sheet a stub. */
  .rnav{display:flex;position:fixed;left:0;right:0;bottom:0;width:auto;z-index:170;
        max-height:60vh;border-left:0;border-top:1px solid var(--line);
        border-radius:12px 12px 0 0;box-shadow:0 -6px 24px rgba(0,0,0,.22);
        transform:translateY(101%);transition:transform .22s ease;
        padding-bottom:env(safe-area-inset-bottom)}
  #runner.navopen .rnav{transform:translateY(0)}
  .rnavhead{display:flex;align-items:center;justify-content:space-between}
  .navclose{display:block;background:none;border:0;font-size:24px;line-height:1;
            color:var(--muted);padding:0 4px}
  /* No min-height on .gcell: it fights the aspect-ratio:1, the grid sizes rows
     to the min-height and every cell then overflows into the row below. */
  /* auto-fill rather than a fixed 6: an iPad would give 119px boxes, a 320px
     phone would give 44px ones. This lands every screen near 50px. */
  .rnavgrid{grid-template-columns:repeat(auto-fill,minmax(46px,1fr))}
  .gcell{font-size:13px}
}

@media (max-width:640px){
  /* notch and home indicator */
  .rbar{padding-left:max(10px,env(safe-area-inset-left));
        padding-right:max(10px,env(safe-area-inset-right))}
  .rfoot{padding-bottom:env(safe-area-inset-bottom);
         height:calc(46px + env(safe-area-inset-bottom))}

  .rbar{gap:8px}
  .rmid{display:none}          /* no room for the category on a phone */
  .rbtn{padding:9px 12px;white-space:nowrap;min-height:38px}

  .qwrap{padding:16px 14px 40px}
  .opt{padding:13px 12px;min-height:44px}       /* Apple's minimum target */
  .opt .txt{font-size:15px}
  .topnav{gap:10px;padding:0 12px;overflow-x:auto}
  main{padding:14px 12px 48px}
  .panel{padding:16px 14px}
  .quickrow{flex-wrap:wrap}
  .btn{min-height:40px}

  /* tabs and any wide block scroll inside themselves, never the page */
  .tabs{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .tabs::-webkit-scrollbar{display:none}
  table,.chainlist,.markdown pre{max-width:100%;overflow-x:auto}

  /* AI tutor: a 420px side panel has nowhere to go on a phone */
  .tutor{position:fixed;inset:0;width:auto;z-index:180;border-left:0}
  .tutorfoot{padding-bottom:env(safe-area-inset-bottom)}

  /* speak bar wraps under the generate button rather than overflowing */
  .aihead{align-items:stretch}
  .speakbar{justify-content:flex-end;flex-wrap:wrap}
  #speak-rate{width:76px}

  .hlbtn{padding:10px 18px;font-size:15px}   /* fat enough to hit with a thumb */
  .srcmodal img{max-width:100%}
}

/* iPad portrait: the side rail fits, the tutor panel does not */
@media (min-width:641px) and (max-width:900px){
  .tutor{width:340px}
}