/* ═══════════════════════════════════════════════════════════════
 *  mmb-mat.css — Curso "Matemáticas Universitarias — Farmacia y Nutrición"
 *  Sobre mmb-tokens.css. Acento índigo académico. Responsive.
 * ═══════════════════════════════════════════════════════════════ */
:root{
  --mat-accent:#4F46E5; --mat-accent-deep:#4338CA;
  --mat-soft:rgba(79,70,229,.14); --mat-soft2:rgba(79,70,229,.07);
}
.mat-body{ margin:0; background:var(--mmb-bg,#070B14); color:var(--mmb-ink,#F4F7FC);
  font-family:'Inter',system-ui,sans-serif; line-height:1.65; min-height:100vh; -webkit-font-smoothing:antialiased; }
.mat-body *{ box-sizing:border-box; }
.mat-body a{ color:inherit; text-decoration:none; }

/* Topnav */
.mat-topnav{ display:flex; align-items:center; gap:10px; padding:12px 20px;
  border-bottom:1px solid var(--mmb-line,rgba(244,247,252,.12)); background:var(--mmb-bg-soft,#0D1320);
  position:sticky; top:0; z-index:40; backdrop-filter:blur(8px); }
.mat-logo{ font-family:'Space Grotesk',sans-serif; font-weight:800; color:var(--mat-accent); }
.mat-topnav-sep{ color:var(--mmb-ink-faint,#67748c); }
.mat-topnav-label{ font-size:.85rem; color:var(--mmb-ink-dim,#9FB0C8); }
.mat-topnav-right{ margin-left:auto; display:flex; gap:8px; }
.mat-btn{ display:inline-flex; align-items:center; gap:.5rem; font-weight:600; font-size:.88rem;
  padding:.5rem .9rem; border-radius:10px; border:1px solid var(--mmb-line,rgba(244,247,252,.15));
  color:var(--mmb-ink,#F4F7FC); background:transparent; cursor:pointer; transition:.16s; white-space:nowrap; }
.mat-btn:hover{ border-color:var(--mat-accent); transform:translateY(-1px); }
.mat-btn-primary{ background:linear-gradient(135deg,var(--mat-accent),var(--mat-accent-deep)); color:#fff; border:none; }
.mat-btn-primary:hover{ box-shadow:0 8px 22px -10px rgba(79,70,229,.7); }
@media(max-width:620px){ .mat-hide-sm{ display:none; } }

.mat-main{ max-width:1080px; margin:0 auto; padding:26px 20px 80px; }
.mat-footer{ text-align:center; padding:22px; color:var(--mmb-ink-dim,#9FB0C8); font-size:.82rem;
  border-top:1px solid var(--mmb-line,rgba(244,247,252,.12)); }
.mat-footer a{ color:var(--mat-accent); }

.mat-lock{ display:flex; gap:14px; align-items:flex-start; background:var(--mmb-bg-soft,#0D1320);
  border:1px solid var(--mmb-line,rgba(244,247,252,.12)); border-left:4px solid var(--mat-accent);
  border-radius:12px; padding:18px; margin:26px 0 16px; }
.mat-lock i{ color:var(--mat-accent); font-size:1.4rem; margin-top:2px; }

/* ── Ficha pública / hero ──────────────────────────────── */
.mat-hero{ background:linear-gradient(135deg,var(--mat-soft),transparent 70%);
  border:1px solid var(--mat-soft); border-radius:18px; padding:30px 26px; margin-bottom:22px; position:relative; overflow:hidden; }
.mat-hero-math{ position:absolute; right:-10px; top:-18px; font-size:7rem; color:var(--mat-soft); font-family:'Times New Roman',serif; pointer-events:none; line-height:1; opacity:.6; }
.mat-badges{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:12px; position:relative; }
.mat-badge{ font-size:.74rem; font-weight:600; padding:4px 11px; border-radius:999px;
  background:var(--mmb-bg,#070B14); border:1px solid var(--mmb-line,rgba(244,247,252,.15)); color:var(--mmb-ink-dim,#9FB0C8); }
.mat-badge-code{ background:var(--mat-accent); color:#fff; border:none; }
.mat-h1{ font-family:'Space Grotesk',sans-serif; font-weight:800; font-size:1.9rem; line-height:1.15; margin:0 0 8px; position:relative; }
.mat-h1 i{ color:var(--mat-accent); }
.mat-lead{ color:var(--mmb-ink-dim,#9FB0C8); font-size:1.02rem; max-width:62ch; position:relative; }
.mat-cta{ display:flex; flex-wrap:wrap; gap:10px; margin-top:16px; position:relative; }

.mat-stats{ display:flex; flex-wrap:wrap; gap:22px; margin-top:16px; position:relative; }
.mat-stat{ display:flex; flex-direction:column; }
.mat-stat .n{ font-family:'Space Grotesk',sans-serif; font-weight:800; font-size:1.3rem; color:var(--mat-accent); }
.mat-stat .l{ font-size:.78rem; color:var(--mmb-ink-dim,#9FB0C8); }

.mat-section{ margin:26px 0; }
.mat-h2{ font-family:'Space Grotesk',sans-serif; font-size:1.3rem; margin:0 0 12px; display:flex; align-items:center; gap:.5rem; }
.mat-h2 i{ color:var(--mat-accent); }
.mat-card{ background:var(--mmb-bg-soft,#0D1320); border:1px solid var(--mmb-line,rgba(244,247,252,.12)); border-radius:14px; padding:20px; }
.mat-muted{ color:var(--mmb-ink-dim,#9FB0C8); }
.mat-note{ font-size:.86rem; color:var(--mmb-ink-dim,#9FB0C8); background:var(--mat-soft2); border:1px solid var(--mat-soft);
  border-radius:10px; padding:10px 13px; margin-top:12px; }
.mat-note i{ color:var(--mat-accent); }

/* "¿Qué aprenderás?" grid */
.mat-aprende{ list-style:none; margin:0; padding:0; display:grid; grid-template-columns:1fr 1fr; gap:9px; }
.mat-aprende li{ display:flex; gap:.55rem; align-items:flex-start; font-size:.92rem; }
.mat-aprende i{ color:var(--mat-accent); margin-top:3px; }
@media(max-width:620px){ .mat-aprende{ grid-template-columns:1fr; } }

/* ── Layout portal (sidebar + contenido) ───────────────── */
.mat-layout{ display:grid; grid-template-columns:260px 1fr; gap:26px; align-items:start; }
.mat-side{ position:sticky; top:66px; max-height:calc(100vh - 86px); overflow:auto;
  background:var(--mmb-bg-soft,#0D1320); border:1px solid var(--mmb-line,rgba(244,247,252,.12)); border-radius:14px; padding:12px; }
.mat-side-home{ display:flex; align-items:center; gap:.55rem; padding:9px 11px; border-radius:9px; font-size:.9rem; font-weight:600; color:var(--mmb-ink,#F4F7FC); }
.mat-side-home:hover,.mat-side-home.is-active{ background:var(--mat-soft); color:var(--mat-accent); }
.mat-side-home i{ width:18px; text-align:center; }
.mat-side-bloque{ font-size:.7rem; text-transform:uppercase; letter-spacing:.04em; color:var(--mmb-ink-faint,#67748c); margin:14px 6px 6px; font-weight:700; }
.mat-side-item{ display:flex; align-items:center; gap:.55rem; padding:8px 11px; border-radius:9px; font-size:.88rem; color:var(--mmb-ink-dim,#9FB0C8); }
.mat-side-item:hover{ background:rgba(255,255,255,.03); color:var(--mmb-ink,#F4F7FC); }
.mat-side-item.is-active{ background:var(--mat-soft); color:var(--mat-accent); font-weight:600; }
.mat-side-item.is-done .mat-side-ic i{ color:var(--mat-accent); }
.mat-side-item.is-locked{ opacity:.5; cursor:default; }
.mat-side-ic{ width:16px; text-align:center; flex:0 0 16px; }
.mat-side-txt{ flex:1; }
.mat-side-txt b{ color:var(--mmb-ink,#F4F7FC); font-weight:700; }
.mat-side-soon{ font-size:.62rem; color:var(--mmb-ink-faint,#67748c); border:1px solid var(--mmb-line,rgba(244,247,252,.15)); padding:1px 6px; border-radius:999px; }

/* Sidebar móvil: desplegable */
.mat-side-mobile{ display:none; margin-bottom:16px; }
.mat-side-mobile summary{ list-style:none; cursor:pointer; display:flex; align-items:center; gap:.5rem;
  background:var(--mmb-bg-soft,#0D1320); border:1px solid var(--mmb-line,rgba(244,247,252,.14)); border-radius:10px; padding:11px 14px; font-weight:600; }
.mat-side-mobile summary::-webkit-details-marker{ display:none; }
.mat-side-mobile[open] summary{ border-radius:10px 10px 0 0; }
.mat-side-mobile .mat-side{ position:static; max-height:70vh; border-radius:0 0 10px 10px; border-top:none; }
@media(max-width:900px){
  .mat-layout{ grid-template-columns:1fr; }
  .mat-side-desktop{ display:none; }
  .mat-side-mobile{ display:block; }
}

/* ── Progreso ──────────────────────────────────────────── */
.mat-progress-wrap{ margin:14px 0; }
.mat-progress-head{ display:flex; justify-content:space-between; font-size:.85rem; color:var(--mmb-ink-dim,#9FB0C8); margin-bottom:6px; }
.mat-progress{ height:10px; border-radius:6px; background:var(--mmb-line,rgba(244,247,252,.1)); overflow:hidden; }
.mat-progress > i{ display:block; height:100%; background:linear-gradient(90deg,var(--mat-accent),var(--mat-accent-deep)); border-radius:6px; transition:width .5s; }

/* ── Lección ───────────────────────────────────────────── */
.mat-crumbs{ font-size:.82rem; color:var(--mmb-ink-dim,#9FB0C8); margin-bottom:14px; display:flex; flex-wrap:wrap; gap:.4rem; align-items:center; }
.mat-crumbs a{ color:var(--mat-accent); }
.mat-crumbs i{ font-size:.6rem; color:var(--mmb-ink-faint,#67748c); }
.mat-lechead{ margin-bottom:8px; }
.mat-lechead .mat-badges{ margin-bottom:8px; }
.mat-block{ margin:20px 0; }
.mat-h3{ font-family:'Space Grotesk',sans-serif; font-size:1.12rem; margin:0 0 10px; display:flex; align-items:center; gap:.5rem; }
.mat-h3 i{ color:var(--mat-accent); }
.mat-objetivos{ list-style:none; margin:0; padding:0; display:grid; gap:8px; }
.mat-objetivos li{ display:flex; gap:.55rem; align-items:flex-start; }
.mat-objetivos i{ color:var(--mat-accent); margin-top:4px; }

.mat-prose{ color:var(--mmb-ink,#F4F7FC); }
.mat-prose p{ margin:.5rem 0; }
.mat-prose ul,.mat-prose ol{ margin:.5rem 0 .5rem 1.15rem; }
.mat-prose li{ margin:.35rem 0; }
.mat-prose strong,.mat-prose b{ color:#fff; }
/* Bloques de fórmula: scroll horizontal propio, nunca scroll de página */
.mat-prose .katex-display{ overflow-x:auto; overflow-y:hidden; padding:6px 2px; margin:.6rem 0;
  background:var(--mat-soft2); border:1px solid var(--mat-soft); border-radius:10px; }
.mat-prose .katex{ font-size:1.05em; }

.mat-seccion{ background:var(--mmb-bg-soft,#0D1320); border:1px solid var(--mmb-line,rgba(244,247,252,.1)); border-radius:12px; padding:16px 18px; margin:14px 0; }

/* Ejercicio interactivo */
.mat-ej{ background:var(--mmb-bg,#070B14); border:1px solid var(--mmb-line,rgba(244,247,252,.14)); border-radius:12px; padding:16px 18px; margin:14px 0; }
.mat-ej-top{ display:flex; align-items:center; gap:.5rem; font-weight:700; color:var(--mat-accent); margin-bottom:8px; }
.mat-ej-enun{ margin-bottom:12px; }
.mat-opts{ display:grid; gap:8px; margin:6px 0; }
.mat-opt{ display:flex; align-items:center; gap:.6rem; padding:10px 13px; border-radius:9px; cursor:pointer;
  border:1px solid var(--mmb-line,rgba(244,247,252,.12)); transition:.14s; }
.mat-opt:hover{ border-color:var(--mat-accent); }
.mat-opt input{ accent-color:var(--mat-accent); }
.mat-opt.is-ok{ border-color:rgba(74,222,128,.6); background:rgba(74,222,128,.08); }
.mat-opt.is-bad{ border-color:rgba(248,113,113,.6); background:rgba(248,113,113,.07); }
.mat-resp-input{ width:100%; max-width:320px; padding:10px 13px; border-radius:9px; font:inherit;
  background:var(--mmb-bg-soft,#0D1320); border:1px solid var(--mmb-line,rgba(244,247,252,.15)); color:var(--mmb-ink,#F4F7FC); }
.mat-ej-actions{ display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; align-items:center; }
.mat-ej-feedback{ margin-top:10px; padding:10px 13px; border-radius:9px; font-size:.92rem; display:none; }
.mat-ej-feedback.show{ display:block; }
.mat-ej-feedback.ok{ background:rgba(74,222,128,.12); border:1px solid rgba(74,222,128,.35); color:#86EFAC; }
.mat-ej-feedback.bad{ background:rgba(248,113,113,.1); border:1px solid rgba(248,113,113,.35); color:#FCA5A5; }
.mat-pista{ margin-top:10px; padding:10px 13px; border-radius:9px; background:var(--mat-soft2); border:1px solid var(--mat-soft); font-size:.9rem; }
.mat-pista b{ color:var(--mat-accent); }
.mat-sol{ margin-top:10px; padding:12px 14px; border-radius:9px; background:var(--mmb-bg-soft,#0D1320); border:1px dashed var(--mat-accent); display:none; }
.mat-sol.show{ display:block; }
.mat-sol-t{ font-weight:700; color:var(--mat-accent); margin-bottom:6px; }

.mat-errbox{ background:rgba(248,113,113,.06); border:1px solid rgba(248,113,113,.3); border-left:4px solid #F87171; border-radius:10px; padding:14px 16px; margin:14px 0; }
.mat-errbox .mat-h3 i{ color:#F87171; }

/* Mini test */
.mat-test{ background:var(--mat-soft2); border:1px solid var(--mat-soft); border-radius:12px; padding:16px 18px; margin:16px 0; }
.mat-test-q{ margin:12px 0; border:0; padding:0; }
.mat-test-q legend{ font-weight:600; padding:0; margin-bottom:6px; }
.mat-test-res{ margin-top:12px; padding:12px 14px; border-radius:10px; font-weight:600; display:none; }
.mat-test-res.show{ display:block; }
.mat-test-res.ok{ background:rgba(74,222,128,.12); color:#86EFAC; border:1px solid rgba(74,222,128,.35); }
.mat-test-res.bad{ background:rgba(248,113,113,.1); color:#FCA5A5; border:1px solid rgba(248,113,113,.35); }

/* Navegación entre lecciones */
.mat-lecnav{ display:flex; justify-content:space-between; align-items:center; gap:10px; margin-top:26px; flex-wrap:wrap; }
.mat-estado{ display:inline-flex; align-items:center; gap:.4rem; font-size:.85rem; font-weight:600; padding:5px 12px; border-radius:999px; }
.mat-estado--completado{ background:var(--mat-soft); color:var(--mat-accent); }
.mat-estado--pendiente{ background:rgba(148,163,184,.12); color:var(--mmb-ink-dim,#9FB0C8); }

/* Rejilla de módulos (ficha) */
.mat-modgrid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:12px; }
.mat-modcard{ background:var(--mmb-bg-soft,#0D1320); border:1px solid var(--mmb-line,rgba(244,247,252,.12)); border-radius:12px; padding:15px; display:flex; flex-direction:column; gap:6px; transition:.15s; }
a.mat-modcard:hover{ border-color:var(--mat-accent); transform:translateY(-2px); }
.mat-modcard-top{ display:flex; align-items:center; justify-content:space-between; }
.mat-modnum{ width:38px; height:38px; border-radius:10px; background:var(--mat-soft); color:var(--mat-accent); display:flex; align-items:center; justify-content:center; }
.mat-modcard h4{ margin:4px 0 0; font-size:.98rem; font-family:'Space Grotesk',sans-serif; }
.mat-modcard small{ color:var(--mmb-ink-dim,#9FB0C8); font-size:.78rem; }
.mat-chip{ font-size:.68rem; font-weight:700; padding:2px 8px; border-radius:999px; }
.mat-chip.done{ background:var(--mat-soft); color:var(--mat-accent); }
.mat-chip.soon{ background:rgba(148,163,184,.14); color:var(--mmb-ink-dim,#9FB0C8); }
.mat-chip.locked{ background:rgba(148,163,184,.14); color:var(--mmb-ink-dim,#9FB0C8); }

.mat-mmbtag{ display:inline-flex; align-items:center; gap:.35rem; font-size:.72rem; font-weight:600;
  background:var(--mat-soft); color:var(--mat-accent); padding:3px 9px; border-radius:999px; }