:root{
  --bg:#F4EFE6; --card:#FFFDF8; --ink:#151413; --muted:#6E675E; --line:#E4DBCC; --soft:#EEE6D8;
  --gold:#9C7643; --gold-ink:#7A5A2B; --gold-soft:#F3E7D3; --amber:#B86E0B; --amber-ink:#7A4A00; --amber-bg:#FFF1D6; --good:#2F6B4F; --good-bg:#E4F0E8;
  --bad:#A33A2A; --shadow:0 1px 2px rgba(21,20,19,.06),0 4px 14px rgba(21,20,19,.05);
  --serif:Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#121110; --card:#1C1A18; --ink:#F2EBDD; --muted:#A49B8D; --line:#2E2A26; --soft:#25221F;
    --gold:#CDA46C; --gold-ink:#CDA46C; --gold-soft:#2C251B; --amber:#E9A33A; --amber-ink:#E9A33A; --amber-bg:#33260F; --good:#7CC39C; --good-bg:#16291F;
    --bad:#E07B6A; --shadow:none; color-scheme:dark;}
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;
  -webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}
body{padding-bottom:calc(76px + env(safe-area-inset-bottom))}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:baseline;justify-content:space-between;
  padding:calc(12px + env(safe-area-inset-top)) 16px 10px;background:var(--bg);border-bottom:1px solid var(--line)}
.brand{font-family:var(--serif);font-weight:700;font-size:22px;letter-spacing:.5px}
.brand .dot{color:var(--gold)}
.topbar-sub{font-size:12px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
main{max-width:640px;margin:0 auto;padding:16px}
h1{font-family:var(--serif);font-size:28px;line-height:1.15;margin:4px 0 6px}
h2{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:24px 0 10px;font-weight:600}
h3{margin:0 0 4px;font-size:17px}
p{line-height:1.5}
.muted{color:var(--muted)} .small{font-size:13px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.stack>*+*{margin-top:12px}
.row{display:flex;gap:10px;align-items:center}
.between{justify-content:space-between}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}
.stat .n{font-family:var(--serif);font-size:34px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1}
.stat .l{font-size:12px;color:var(--muted);margin-top:6px;text-transform:uppercase;letter-spacing:.06em}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--ink);
  background:var(--ink);color:var(--bg);border-radius:12px;padding:13px 16px;font-weight:600;cursor:pointer;
  text-decoration:none;min-height:48px}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.danger{background:transparent;color:var(--bad);border-color:var(--bad)}
.btn.block{width:100%}
.btn:disabled{opacity:.5}
.cta{display:flex;align-items:center;gap:14px;background:var(--ink);color:var(--bg);border-radius:16px;
  padding:18px;text-decoration:none}
.cta .t{font-family:var(--serif);font-size:21px;font-weight:700}
.cta .s{font-size:13px;opacity:.75;margin-top:2px}
.cta svg{width:30px;height:30px;stroke:var(--gold);fill:none;stroke-width:2;flex:none}
.chip{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.08em;padding:3px 8px;border-radius:99px;
  background:var(--soft);color:var(--ink);text-transform:uppercase}
.chip.gold{background:var(--gold-soft);color:var(--gold-ink)}
.list{list-style:none;margin:0;padding:0}
.list li{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.list li:last-child{border-bottom:0}
.list a{text-decoration:none}
.num{font-variant-numeric:tabular-nums}
.pr-badge{color:var(--gold-ink);font-weight:700;white-space:nowrap}
.tabbar{position:fixed;bottom:0;left:0;right:0;z-index:6;display:flex;justify-content:space-around;
  background:var(--card);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom))}
.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;
  color:var(--muted);font-size:11px;padding:4px 0}
.tabbar svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tabbar a.on{color:var(--ink)}
.tabbar .tab-scan svg{background:var(--ink);color:var(--bg);border-radius:12px;padding:5px;width:38px;height:38px;margin-top:-14px}
.tabbar .tab-scan.on svg{background:var(--gold)}
input[type=text],input[type=email],input[type=password],input[type=date],select,textarea,input[type=number]{
  width:100%;border:1px solid var(--line);background:var(--card);border-radius:10px;padding:12px;min-height:46px}
textarea{min-height:70px;resize:vertical}
label.f{display:block;font-size:13px;color:var(--muted);margin:12px 0 6px}
.err{color:var(--bad);font-size:14px;min-height:20px;margin-top:8px}
.notice{border-radius:12px;padding:12px 14px;font-size:14px;line-height:1.45}
.notice.warn{background:var(--amber-bg);color:var(--amber-ink)}
.notice.ok{background:var(--good-bg);color:var(--good)}
.notice.info{background:var(--soft)}
.seg{display:flex;background:var(--soft);border-radius:10px;padding:3px}
.seg button{flex:1;border:0;background:transparent;padding:9px;border-radius:8px;font-size:14px;cursor:pointer}
.seg button.on{background:var(--card);box-shadow:var(--shadow);font-weight:600}
/* revisión */
.ex{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px}
.ex+.ex{margin-top:10px}
.ex-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.ex-name{font-weight:700}
.ex-group{font-size:11px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.last{font-size:13px;color:var(--muted);margin:4px 0 8px}
.sets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.set{border:1px solid var(--line);border-radius:10px;padding:6px;background:var(--bg);min-width:0}
.set .sl{font-size:10px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin-bottom:4px}
.set img{display:block;width:100%;height:58px;object-fit:contain;background:#fff;border-radius:6px;margin-bottom:6px}
.set .io{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:4px}
.set input{min-width:0;width:100%;min-height:40px;padding:6px 4px;text-align:center;font-weight:700;font-size:17px;border-radius:8px}
.set .u{display:grid;grid-template-columns:1fr 1fr;gap:4px;font-size:9px;color:var(--muted);text-align:center;
  letter-spacing:.06em;margin-top:2px}
.set input.unc{border:2px solid var(--amber);background:var(--amber-bg)}
.name-crop{width:100%;height:44px;object-fit:contain;background:#fff;border-radius:6px;margin:6px 0}
.hidden-rows summary{cursor:pointer;color:var(--muted);font-size:14px;padding:10px 0}
.sticky-save{position:sticky;bottom:calc(76px + env(safe-area-inset-bottom));margin-top:16px;padding:10px 0;
  background:linear-gradient(transparent,var(--bg) 30%)}
.spinner{width:42px;height:42px;border:4px solid var(--line);border-top-color:var(--gold);border-radius:50%;
  animation:spin 1s linear infinite;margin:30px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;position:relative;padding:8px 0 8px 36px;line-height:1.4}
.steps li::before{content:counter(s);position:absolute;left:0;top:7px;width:24px;height:24px;border-radius:50%;
  background:var(--ink);color:var(--bg);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.heat{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,1fr);gap:3px}
.heat i{display:block;width:100%;aspect-ratio:1;border-radius:3px;background:var(--soft)}
.heat i.on{background:var(--gold)}
.heat i.today{outline:1.5px solid var(--ink)}
.chart svg{width:100%;height:auto;display:block}
.chart .axis{stroke:var(--line);stroke-width:1}
.chart .lbl{fill:var(--muted);font-size:10px}
.chart .ln{fill:none;stroke:var(--ink);stroke-width:2.2}
.chart .pt{fill:var(--card);stroke:var(--ink);stroke-width:2}
.chart .pt.pr{fill:var(--gold);stroke:var(--gold)}
.chart .area{fill:var(--gold-soft)}
.table{width:100%;border-collapse:collapse;font-size:14px}
.table td,.table th{padding:8px 4px;border-bottom:1px solid var(--line);text-align:left}
.table th{font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:600}
.table td.r,.table th.r{text-align:right}
.celebrate{text-align:center;padding:24px 8px}
.celebrate .big{font-family:var(--serif);font-size:30px;font-weight:700}
.empty{text-align:center;padding:30px 12px;color:var(--muted)}
.auth{max-width:420px;margin:6vh auto 0}
.auth .tag{font-family:var(--serif);font-style:italic;font-size:20px;margin:6px 0 22px}
.preview{width:100%;max-height:260px;object-fit:contain;border-radius:12px;background:var(--soft)}
.tip{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.4}
.tip>div>b:first-child{display:block}
main{overflow-x:hidden}
.addset{border:1px dashed var(--line);border-radius:10px;background:transparent;color:var(--muted);font-size:13px;cursor:pointer;min-height:60px}

/* v5: revisión de un vistazo — una línea por ejercicio, una casilla por serie (como el cuaderno) */
.rv-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:10px}
.rv-meta input,.rv-meta select{width:auto;min-height:40px;padding:6px 10px}
.pg{margin-top:10px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:4px 8px 6px}
.pg-h,.pl{display:grid;grid-template-columns:minmax(0,1fr) repeat(var(--cols,6),minmax(36px,44px));gap:3px;align-items:stretch}
.pg-h{font-size:10px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;padding:6px 0 4px}
.pg-h span{text-align:center}.pg-h span:first-child{text-align:left}
.pl{padding:5px 0;border-top:1px solid var(--line)}
.pl-name{all:unset;cursor:pointer;min-width:0;font-weight:700;font-size:13px;line-height:1.2;overflow-wrap:anywhere;
  display:flex;flex-direction:column;justify-content:center;gap:2px}
.pl-name small{font-weight:500;font-size:9.5px;letter-spacing:.06em;color:var(--muted);text-transform:uppercase}
.pl-name img{height:20px;max-width:100%;object-fit:contain;object-position:left;background:#fff;border-radius:4px}
.pl-name.need span{color:var(--amber-ink);text-decoration:underline}
.cl{all:unset;box-sizing:border-box;cursor:pointer;height:46px;border:1px solid var(--line);border-radius:8px;background:var(--bg);
  display:flex;flex-direction:column;align-items:center;justify-content:center;font-variant-numeric:tabular-nums}
.cl b{font-size:13.5px;line-height:1.15}
.cl i{font-style:normal;font-size:12.5px;line-height:1.15;color:var(--muted);border-top:1px dashed var(--line);width:72%;text-align:center;padding-top:1px;margin-top:1px}
.cl.unc{background:var(--amber-bg);border:2px solid var(--amber)}
.cl.unc b,.cl.unc i{color:var(--amber-ink)}
.cl.add{border-style:dashed;color:var(--muted);font-size:18px;background:transparent}
.cl.none{border:none;background:none;cursor:default}
.cl:focus-visible,.pl-name:focus-visible{outline:2px solid var(--ink);outline-offset:1px}
.hidden-rows .pg{margin-top:0}
.sheet-bg{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:30}
.sheet{position:fixed;left:12px;right:12px;top:calc(10px + env(safe-area-inset-top));z-index:31;max-width:520px;margin:0 auto;
  background:var(--card);border-radius:16px;padding:14px;box-shadow:0 12px 40px rgba(0,0,0,.35);max-height:85vh;overflow:auto}
.sh-top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.sh-x{all:unset;cursor:pointer;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:10px;color:var(--muted)}
.sh-crop{display:block;width:100%;max-height:150px;object-fit:contain;background:#fff;border-radius:10px;border:1px solid var(--line);margin-top:10px}
.sh-crop.name{max-height:60px;margin-top:0}
.sh-in{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}
.sh-in label{display:block;min-width:0;font-size:11px;color:var(--muted);letter-spacing:.08em}
.sh-in input{display:block;width:100%;box-sizing:border-box;font-size:24px;font-weight:700;text-align:center;min-height:54px;margin-top:4px}
.sh-in input.unc{border:2px solid var(--amber)}
.sheet .why{font-size:13px;color:var(--amber-ink);font-weight:600;margin-top:8px;line-height:1.3}
.sh-btns{display:flex;gap:8px;margin-top:12px}.sh-btns .btn{flex:1}
body.reviewing{padding-bottom:calc(140px + env(safe-area-inset-bottom))}
.reviewbar{position:fixed;left:0;right:0;bottom:calc(62px + env(safe-area-inset-bottom));z-index:6;display:flex;gap:8px;
  padding:10px 16px;background:var(--bg);border-top:1px solid var(--line);max-width:640px;margin:0 auto}
.reviewbar .btn{flex:1}
.reviewbar #rv-next{flex:0 0 auto;border-color:var(--amber);color:var(--amber-ink)}
.celebrate .check{width:52px;height:52px;margin:0 auto 10px;border-radius:50%;background:var(--ink);color:var(--bg);
  display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:700}
.cta svg path{stroke-linecap:round;stroke-linejoin:round}
a.card.stat{color:inherit}

[hidden]{display:none!important}
.bar{height:8px;border-radius:4px;background:var(--soft);overflow:hidden}
.bar i{display:block;height:100%;background:var(--gold);border-radius:4px}
.book-card{display:flex;gap:14px;align-items:center;text-decoration:none;color:inherit}
.book-card img{flex:none;width:96px;height:144px;object-fit:cover;border-radius:4px;box-shadow:0 6px 16px rgba(0,0,0,.18)}