/* Parcel — RECO study app
   Palette: night-study ink + surveyor brass + registered-stamp green */
:root{
  --bg:#0F1419;
  --surface:#1A222C;
  --raised:#232E3A;
  --line:#2E3A47;
  --text:#E8E4DA;
  --muted:#94A0AC;
  --ok:#4FB286;
  --ok-dim:#23423A;
  --bad:#C75C4A;
  --bad-dim:#46271F;
  --brass:#D9A441;
  --serif:Georgia,'Times New Roman',serif;
  --sans:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);color:var(--text);font-family:var(--sans);
  font-size:16px;line-height:1.5;
  padding-bottom:calc(64px + env(safe-area-inset-bottom));
}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:.01em}
h1{font-size:1.45rem;margin:.2rem 0 .6rem}
h2{font-size:1.15rem;margin:1rem 0 .5rem}
button{font-family:inherit;font-size:1rem;cursor:pointer}
:focus-visible{outline:2px solid var(--brass);outline-offset:2px;border-radius:4px}

/* top bar */
.topbar{
  position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;
  padding:.65rem 1rem;background:rgba(15,20,25,.92);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.brand{font-family:var(--serif);font-size:1.05rem}
.brand-mark{color:var(--brass);margin-right:.3rem}
.brand-sub{color:var(--muted);font-size:.8rem;font-family:var(--sans);margin-left:.35rem;letter-spacing:.06em;text-transform:uppercase}
.topbar-right{font-size:.85rem;color:var(--muted)}

.view{max-width:680px;margin:0 auto;padding:1rem 1rem 2rem}

/* bottom tab bar */
.tabbar{
  position:fixed;bottom:0;left:0;right:0;z-index:6;
  display:flex;background:#131A21;border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tab{
  flex:1;background:none;border:none;color:var(--muted);
  padding:.5rem 0 .55rem;font-size:.7rem;display:flex;flex-direction:column;align-items:center;gap:2px;
}
.tab-ico{font-size:1.05rem;line-height:1}
.tab.active{color:var(--brass)}

/* cards & panels */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:1rem;margin:.75rem 0}
.kicker{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:.25rem}
.muted{color:var(--muted)}
.small{font-size:.85rem}

/* signature: parcel grid (survey-plan mastery map) */
.parcel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.6rem;margin:.6rem 0}
.parcel{
  position:relative;border:1.5px dashed var(--line);border-radius:6px;
  padding:.6rem .65rem .7rem;background:var(--surface);text-align:left;color:var(--text);
  min-height:86px;display:flex;flex-direction:column;justify-content:space-between;
}
.parcel:active{transform:scale(.985)}
.parcel .pin{font-size:.66rem;letter-spacing:.14em;color:var(--muted);font-variant-numeric:tabular-nums}
.parcel .pt{font-size:.82rem;line-height:1.25;margin:.25rem 0 .4rem;font-family:var(--serif)}
.parcel .meter{height:6px;border-radius:3px;background:var(--raised);overflow:hidden}
.parcel .meter i{display:block;height:100%;background:var(--ok);transition:width .4s ease}
.parcel.mastered{border-style:solid;border-color:var(--ok)}
.parcel .stamp{
  position:absolute;top:.4rem;right:.45rem;font-size:.6rem;color:var(--ok);
  border:1px solid var(--ok);border-radius:3px;padding:0 .25rem;letter-spacing:.08em;
  transform:rotate(6deg);opacity:.9;
}

/* accordion */
.acc{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:.6rem 0;background:var(--surface)}
.acc-head{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:.5rem;
  background:none;border:none;color:var(--text);padding:.85rem 1rem;text-align:left;
  font-family:var(--serif);font-size:1rem;
}
.acc-head .chev{color:var(--muted);transition:transform .2s}
.acc.open .chev{transform:rotate(90deg)}
.acc-body{display:none;padding:0 1rem 1rem;border-top:1px solid var(--line)}
.acc.open .acc-body{display:block}
.note-h{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--brass);margin:.9rem 0 .3rem}
.acc-body ul{margin:.2rem 0 .4rem;padding-left:1.1rem}
.acc-body li{margin:.35rem 0;color:var(--text)}

/* buttons */
.btn{
  display:inline-block;background:var(--raised);color:var(--text);
  border:1px solid var(--line);border-radius:8px;padding:.6rem 1rem;
}
.btn.primary{background:var(--ok-dim);border-color:var(--ok);color:#CFEFE0}
.btn.brass{background:#3A2F17;border-color:var(--brass);color:#F2DCA8}
.btn.block{display:block;width:100%;text-align:center;margin:.5rem 0}
.btn:disabled{opacity:.45;cursor:default}
.btn-row{display:flex;gap:.5rem;flex-wrap:wrap;margin:.6rem 0}
.chip{
  border:1px solid var(--line);background:var(--surface);color:var(--muted);
  border-radius:999px;padding:.35rem .85rem;font-size:.85rem;
}
.chip.sel{border-color:var(--brass);color:var(--brass)}

/* question */
.q-meta{display:flex;justify-content:space-between;font-size:.8rem;color:var(--muted);margin-bottom:.4rem;font-variant-numeric:tabular-nums}
.q-text{font-family:var(--serif);font-size:1.08rem;line-height:1.45;margin:.3rem 0 .9rem}
.opt{
  display:block;width:100%;text-align:left;margin:.45rem 0;padding:.7rem .85rem;
  background:var(--surface);border:1px solid var(--line);border-radius:8px;color:var(--text);line-height:1.4;
}
.opt .letter{color:var(--muted);margin-right:.5rem;font-variant-numeric:tabular-nums}
.opt.correct{background:var(--ok-dim);border-color:var(--ok)}
.opt.wrong{background:var(--bad-dim);border-color:var(--bad)}
.opt.picked-exam{border-color:var(--brass);background:#2A2616}
.opt:disabled{cursor:default;opacity:1}
.explain{
  margin:.7rem 0 0;padding:.7rem .85rem;border-left:3px solid var(--brass);
  background:var(--raised);border-radius:0 8px 8px 0;font-size:.92rem;
}
.verdict{font-family:var(--serif);font-size:1rem;margin:.6rem 0 0}
.verdict.ok{color:var(--ok)} .verdict.bad{color:var(--bad)}

/* flashcards */
.fcard{
  min-height:200px;border:1px solid var(--line);border-radius:12px;background:var(--surface);
  display:flex;align-items:center;justify-content:center;text-align:center;
  padding:1.2rem;font-size:1.05rem;line-height:1.5;cursor:pointer;width:100%;color:var(--text);
}
.fcard.back{border-color:var(--brass);background:var(--raised);font-family:var(--serif)}
.fcard-count{text-align:center;color:var(--muted);font-size:.85rem;margin:.4rem 0;font-variant-numeric:tabular-nums}

/* exam */
.timer{font-variant-numeric:tabular-nums;color:var(--brass);font-size:.95rem}
.timer.low{color:var(--bad)}
.progressbar{height:5px;background:var(--raised);border-radius:3px;margin:.5rem 0 1rem;overflow:hidden}
.progressbar i{display:block;height:100%;background:var(--brass);transition:width .25s}
.score-hero{text-align:center;padding:1.4rem 1rem}
.score-hero .pct{font-family:var(--serif);font-size:3.2rem;line-height:1}
.score-hero .passfail{
  display:inline-block;margin-top:.6rem;padding:.2rem .8rem;border-radius:4px;
  font-size:.85rem;letter-spacing:.15em;text-transform:uppercase;border:1.5px solid;
  transform:rotate(-3deg);
}
.score-hero .passfail.pass{color:var(--ok);border-color:var(--ok)}
.score-hero .passfail.fail{color:var(--bad);border-color:var(--bad)}
.bar-row{display:flex;align-items:center;gap:.6rem;margin:.45rem 0;font-size:.85rem}
.bar-row .lbl{width:3rem;color:var(--muted);font-variant-numeric:tabular-nums}
.bar-row .track{flex:1;height:8px;background:var(--raised);border-radius:4px;overflow:hidden}
.bar-row .track i{display:block;height:100%;background:var(--ok)}
.bar-row .pct2{width:3.2rem;text-align:right;font-variant-numeric:tabular-nums}

/* forms */
.field{margin:.7rem 0}
.field label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:.3rem}
input[type=password],input[type=text],select{
  width:100%;padding:.6rem .7rem;background:var(--raised);border:1px solid var(--line);
  border-radius:8px;color:var(--text);font-size:1rem;
}
.sync-msg{font-size:.85rem;margin-top:.5rem}
.sync-msg.ok{color:var(--ok)} .sync-msg.bad{color:var(--bad)}

.review-item{border-bottom:1px solid var(--line);padding:.8rem 0}
.review-item:last-child{border-bottom:none}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}