/* Layout: cuaderno de curso de una columna; índice arriba, lección abajo; los números van en "tickets" mono */
:root{
  --paper:#F3F5F1; --card:#FFFFFF; --ink:#16202E; --muted:#59626F; --line:#D9DED6;
  --cobalt:#2B45C9; --cobalt-soft:#E3E8FB; --marker:#FFD43B; --marker-ink:#16202E;
  --good:#1E7A4C; --good-soft:#DDF1E5; --bad:#B4322A; --bad-soft:#F8E1DE;
  --f-display:"Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --f-body:"Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --f-mono:"JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#11161F; --card:#1A212D; --ink:#E9EDF3; --muted:#9AA4B3; --line:#2C3544;
  --cobalt:#8EA2FF; --cobalt-soft:#232D4D; --marker:#F5CB2E; --marker-ink:#11161F;
  --good:#6FD39C; --good-soft:#173527; --bad:#FF8A80; --bad-soft:#3D1F1D; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#11161F; --card:#1A212D; --ink:#E9EDF3; --muted:#9AA4B3; --line:#2C3544;
  --cobalt:#8EA2FF; --cobalt-soft:#232D4D; --marker:#F5CB2E; --marker-ink:#11161F;
  --good:#6FD39C; --good-soft:#173527; --bad:#FF8A80; --bad-soft:#3D1F1D; color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.6;padding-inline:16px;padding-block:24px 64px}
.wrap{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:32px}
h1,h2,h3{font-family:var(--f-display);line-height:1.1;text-wrap:balance;margin:0}
h1{font-size:clamp(2.2rem,7vw,3.4rem);font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(1.6rem,5vw,2.2rem);font-weight:800;letter-spacing:-.01em}
h3{font-size:1.25rem;font-weight:700}
p{margin:0;max-width:65ch}
.eyebrow{font-family:var(--f-mono);font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
mark{background:linear-gradient(transparent 55%,var(--marker) 55%);color:inherit;padding:0 .1em}
.num{font-family:var(--f-mono);font-variant-numeric:tabular-nums;font-weight:700}
a{color:var(--cobalt)}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:2px}

header.hero{display:flex;flex-direction:column;gap:12px}
header.hero p{color:var(--muted);font-size:1.1rem}

/* Índice */
.index{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.mod{display:flex;gap:10px;align-items:flex-start;text-align:left;font:inherit;color:inherit;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px;cursor:pointer;min-width:0}
.mod:hover:not([aria-disabled="true"]){border-color:var(--cobalt)}
.mod:disabled{cursor:default;opacity:.55}
.mod[aria-current="true"]{border-color:var(--cobalt);box-shadow:inset 0 0 0 1px var(--cobalt)}
.mod .n{font-family:var(--f-mono);font-weight:700;font-size:.9rem;min-width:2.2em;height:2.2em;display:grid;place-items:center;border-radius:6px;background:var(--cobalt-soft);color:var(--cobalt)}
.mod .t{font-size:.95rem;line-height:1.3;min-width:0}
.mod .s{display:block;font-size:.75rem;color:var(--muted);margin-top:2px;font-family:var(--f-mono);letter-spacing:.04em}
.mod.done .n{background:var(--good);color:var(--card)}
.progress{display:flex;align-items:center;gap:12px;font-size:.9rem;color:var(--muted)}
.bar{flex:1;height:8px;border-radius:99px;background:var(--line);overflow:hidden}
.bar span{display:block;height:100%;background:var(--cobalt);transition:width .4s}

/* Lección */
.lesson{display:flex;flex-direction:column;gap:22px}
.lesson-head{display:flex;flex-direction:column;gap:10px;border-top:3px solid var(--ink);padding-top:18px}
.why{font-size:.95rem;color:var(--muted);border-left:3px solid var(--marker);padding-left:12px}
.block{display:flex;flex-direction:column;gap:12px}
.lab{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;display:flex;flex-direction:column;gap:14px}
.lab-title{display:flex;align-items:center;gap:8px;font-family:var(--f-display);font-weight:700;font-size:1.1rem}
.tag{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;background:var(--marker);color:var(--marker-ink);padding:2px 7px;border-radius:4px}
.callout{background:var(--cobalt-soft);border-radius:10px;padding:14px 16px}
.callout strong{color:var(--cobalt)}
ul.clean{margin:0;padding-left:1.2em;display:flex;flex-direction:column;gap:6px;max-width:65ch}

/* Sábado */
.wallet{display:flex;flex-wrap:wrap;gap:10px}
.ticket{font-family:var(--f-mono);font-variant-numeric:tabular-nums;border:1.5px dashed var(--ink);border-radius:8px;padding:6px 12px;font-size:.95rem}
.ticket.over{border-color:var(--bad);color:var(--bad)}
.opts{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}
.opt{display:flex;gap:10px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:10px;cursor:pointer;min-width:0}
.opt:has(input:checked){border-color:var(--cobalt);background:var(--cobalt-soft)}
.opt:has(input:disabled){opacity:.45;cursor:not-allowed}
.opt input{width:18px;height:18px;accent-color:var(--cobalt);flex:none}
.opt .meta{font-family:var(--f-mono);font-size:.78rem;color:var(--muted);display:block}
.result{font-size:.98rem}

/* Formularios */
.field{display:flex;flex-direction:column;gap:4px}
.field label{font-size:.9rem;display:flex;justify-content:space-between;gap:8px}
input[type=range]{width:100%;accent-color:var(--cobalt)}
input[type=number]{font:inherit;font-family:var(--f-mono);width:7em;padding:6px 8px;border-radius:6px;border:1px solid var(--line);background:var(--paper);color:var(--ink)}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.summary{display:flex;flex-wrap:wrap;gap:10px}
.pill{border-radius:99px;padding:4px 12px;font-size:.9rem;font-weight:700}
.pill.ok{background:var(--good-soft);color:var(--good)}
.pill.ko{background:var(--bad-soft);color:var(--bad)}

/* Gráfico interés */
.chart-box{overflow-x:auto}
svg text{font-family:var(--f-mono);font-size:11px;fill:var(--muted)}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:.85rem;color:var(--muted)}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px;vertical-align:-1px}

/* Quiz */
.quiz{display:flex;flex-direction:column;gap:18px}
.q{display:flex;flex-direction:column;gap:8px}
.q p{font-weight:700}
.answers{display:flex;flex-direction:column;gap:6px}
.answers button{font:inherit;text-align:left;background:var(--card);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:9px 12px;cursor:pointer}
.answers button:hover:not(:disabled){border-color:var(--cobalt)}
.answers button.right{background:var(--good-soft);border-color:var(--good);color:var(--good);font-weight:700}
.answers button.wrong{background:var(--bad-soft);border-color:var(--bad);color:var(--bad)}
.answers button:disabled{cursor:default}
.explain{font-size:.92rem;color:var(--muted)}
.score{font-family:var(--f-display);font-weight:700;font-size:1.1rem}
.btn{font:inherit;font-weight:700;background:var(--ink);color:var(--paper);border:0;border-radius:8px;padding:10px 16px;cursor:pointer;align-self:flex-start}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.challenge{border:2px solid var(--ink);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:8px}
.next{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.soon{color:var(--muted);font-size:.95rem}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* Enlaces con aspecto de botón/tarjeta (multipágina) */
a.mod,a.btn{text-decoration:none}
a.btn{display:inline-block}
.mod[aria-disabled="true"]{cursor:default;opacity:.55}
.mod[aria-disabled="true"]:hover{border-color:var(--line)}
.progress a{white-space:nowrap}
.progress{flex-wrap:wrap}
.bar{min-width:120px}
textarea{font:inherit;width:100%;min-height:6em;padding:8px 10px;border-radius:6px;border:1px solid var(--line);background:var(--paper);color:var(--ink);resize:vertical}
[hidden]{display:none!important}
input[type=text]{font:inherit;width:100%;padding:6px 8px;border-radius:6px;border:1px solid var(--line);background:var(--paper);color:var(--ink)}
select{font:inherit;max-width:100%;padding:6px 8px;border-radius:6px;border:1px solid var(--line);background:var(--paper);color:var(--ink)}
@media print{body *{visibility:hidden}#planResumen,#planResumen *{visibility:visible}#planResumen{position:absolute;left:0;top:0;width:100%}.no-print{display:none!important}}