/* ===================== DESIGN TOKENS ===================== */
:root{
  --sage-50:#f4f7f2; --sage-100:#e6ede1; --sage-200:#cddbc2; --sage-300:#a9c297;
  --sage-400:#84a86f; --sage-500:#638651; --sage-600:#4d6b3f; --sage-700:#3d5432;
  --sage-800:#31432a; --sage-900:#293823;
  --terracotta:#c1613f; --terracotta-dark:#a34e30;
  --mustard:#d9a441; --mustard-dark:#b8842a;
  --premium-gold:#b8933f; --premium-gold-dark:#8f6f28; --premium-bg:#fbf6ea;
  --paper:#fffdf9; --ink:#2b2e28; --ink-soft:#5c6355; --line:#e2e0d5;
  --danger:#b23b2e; --danger-bg:#fbeae7;
  --heading:#31432a; --heading-soft:#3d5432; --link:#4d6b3f;
  --radius-sm:8px; --radius-md:14px; --radius-lg:22px;
  --shadow-sm:0 1px 3px rgba(41,56,35,.08);
  --shadow-md:0 6px 20px rgba(41,56,35,.10);
  --font-title:'Fraunces',Georgia,serif;
  --font-body:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  --header-h:64px;
  --sidebar-w:300px;
}

@media (prefers-color-scheme: dark){
  :root{
    --paper:#20241d; --ink:#eef0e8; --ink-soft:#b7bdac; --line:#3a4232;
    --sage-50:#242a1f; --sage-100:#2c3324;
    --heading:#e6ede1; --heading-soft:#a9c297; --link:#84a86f;
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}
body{
  margin:0;font-family:var(--font-body);background:var(--sage-50);color:var(--ink);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-title);color:var(--heading);line-height:1.2;margin:0 0 .5em}
p{line-height:1.65;margin:0 0 1em}
a{color:var(--link)}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}

/* ===================== LAYOUT SHELL ===================== */
#app-shell{min-height:100vh;display:flex;flex-direction:column}

.topbar{
  position:sticky;top:0;z-index:40;height:var(--header-h);
  background:var(--paper);border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:12px;padding:0 16px;
}
.topbar .brand{display:flex;align-items:center;gap:10px;font-family:var(--font-title);font-weight:600;font-size:1.15rem;color:var(--heading-soft);text-decoration:none;flex:1}
.topbar .brand .leaf{font-size:1.4rem}
.icon-btn{
  width:40px;height:40px;border-radius:50%;border:none;background:transparent;
  display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:var(--heading-soft);
}
.icon-btn:hover{background:var(--sage-100)}
.drawer-toggle{display:none}

.scroll-progress{position:fixed;top:0;left:0;height:3px;background:var(--terracotta);z-index:60;transition:width .1s linear}

.layout{display:flex;flex:1;max-width:1400px;margin:0 auto;width:100%}

/* Sidebar */
.sidebar{
  width:var(--sidebar-w);flex:none;border-right:1px solid var(--line);
  padding:20px 14px 60px;position:sticky;top:var(--header-h);
  height:calc(100vh - var(--header-h));overflow-y:auto;
}
.sidebar-section{margin-bottom:22px}
.sidebar-section h4{
  font-family:var(--font-body);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-soft);margin:0 0 8px;padding:0 10px;
}
.nav-item{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-sm);
  color:var(--ink);text-decoration:none;font-size:.92rem;cursor:pointer;border:none;background:none;width:100%;text-align:left;
}
.nav-item:hover{background:var(--sage-100)}
.nav-item.active{background:var(--sage-200);font-weight:600;color:var(--sage-800)}
.nav-item .check{width:16px;height:16px;border-radius:50%;border:1.5px solid var(--sage-300);flex:none}
.nav-item.done .check{background:var(--sage-500);border-color:var(--sage-500);position:relative}
.nav-item.done .check::after{content:'✓';position:absolute;inset:0;color:#fff;font-size:10px;display:flex;align-items:center;justify-content:center}
.nav-item.premium{color:var(--premium-gold-dark)}
.nav-item .badge-mini{margin-left:auto;font-size:.65rem;background:var(--terracotta);color:#fff;border-radius:20px;padding:1px 6px}

.sidebar-progress{margin:0 10px 18px;padding:12px;background:var(--sage-100);border-radius:var(--radius-md)}
.sidebar-progress .lvl{font-weight:700;font-size:.85rem;color:var(--heading)}
.xp-bar{height:8px;background:var(--sage-200);border-radius:20px;overflow:hidden;margin-top:8px}
.xp-bar .fill{height:100%;background:linear-gradient(90deg,var(--sage-400),var(--mustard));transition:width .5s ease}

.drawer-backdrop{display:none}

/* Main content */
.main-col{flex:1;min-width:0;padding:0}
.content-wrap{max-width:720px;margin:0 auto;padding:32px 20px 100px}

/* ===================== READING MODE (lesson view) =====================
   Fixed look regardless of system light/dark preference: a cream "page"
   floating on a dark green background, like a premium course reader. */
.main-col.reading-mode{
  background:#1e2419;
}
.main-col.reading-mode .content-wrap{
  /* pin the palette used inside the sheet so it never flips with
     prefers-color-scheme: dark — the sheet is always a light page */
  --paper:#faf8f1; --ink:#2b2e28; --ink-soft:#5c6355; --line:#e6e2d3;
  --heading:#31432a; --heading-soft:#3d5432; --link:#4d6b3f;
  --sage-50:#f4f7f2; --sage-100:#e6ede1;
  background:#faf8f1; color:#2b2e28;
  border-radius:18px; margin:32px auto 60px; padding:40px 44px;
  box-shadow:0 24px 60px rgba(0,0,0,.4), 0 2px 10px rgba(0,0,0,.25);
}
.main-col.reading-mode .article{font-size:1.12rem;line-height:1.75}
.main-col.reading-mode .article p{margin-bottom:1.2em}

.crumbs{font-size:.8rem;color:var(--ink-soft);margin-bottom:14px}
.crumbs a{color:var(--ink-soft);text-decoration:none}

.lesson-header{margin-bottom:26px}
.lesson-eyebrow{
  font-size:.72rem;font-weight:700;letter-spacing:2px;text-transform:uppercase;
  color:var(--terracotta-dark);margin-bottom:10px;
}
.lesson-header h1{font-size:2.1rem;line-height:1.15;margin-bottom:16px}
.lesson-divider{border-top:1px solid var(--line);margin-bottom:14px}
.lesson-meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  color:var(--ink-soft);font-size:.9rem;margin-bottom:14px;
}
.lesson-meta-row .sep{opacity:.55}
.meta-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:6px}
.badge{
  display:inline-flex;align-items:center;gap:5px;font-size:.75rem;font-weight:600;
  padding:5px 11px;border-radius:20px;background:var(--sage-100);color:var(--heading-soft);
  border:1px solid var(--sage-200);
}
.badge.tiempo{background:#eef2ea;color:#3d5432}
.badge.nivel-basico{background:#e7f2e2;color:#3d5432}
.badge.nivel-precaucion{background:#fdf1e0;color:var(--mustard-dark)}
.badge.nivel-avanzado{background:var(--danger-bg);color:var(--danger)}
.badge.seguridad{background:var(--danger-bg);color:var(--danger);border-color:#f0c7c0}
.badge.premium{background:var(--premium-bg);color:var(--premium-gold-dark);border-color:#e6d4a0}
.badge.gift{background:#fdf1e0;color:var(--terracotta-dark)}

/* Article typography */
.article{font-size:1.02rem}
.article h1{font-size:1.6rem;margin-top:1.6em}
.article h2{font-size:1.3rem;margin-top:1.5em;padding-bottom:.35em;border-bottom:1px solid var(--line)}
.article h3{font-size:1.08rem;margin-top:1.3em;color:var(--heading-soft)}
.article h4{font-size:.95rem;margin-top:1.1em;color:var(--terracotta-dark);text-transform:uppercase;letter-spacing:.03em;font-family:var(--font-body);font-weight:700}
.article ul,.article ol{padding-left:1.3em;margin:0 0 1em}
.article li{margin-bottom:.4em;line-height:1.6}

/* Interactive recipe checklist (ingredients / materials / steps) */
.article .checklist{list-style:none;padding-left:0}
.article .check-item{
  position:relative;padding:6px 8px 6px 34px;margin-bottom:4px;border-radius:8px;
  cursor:pointer;transition:background .15s;user-select:none;
}
.article .check-item:hover{background:var(--sage-100)}
.article .check-item::before{
  content:"";position:absolute;left:6px;top:9px;width:19px;height:19px;box-sizing:border-box;
  border:2px solid var(--sage-400);border-radius:6px;background:var(--paper);
  transition:background .15s,border-color .15s;
}
.article .check-item.checked::before{background:var(--sage-600);border-color:var(--sage-600)}
.article .check-item.checked::after{
  content:"✓";position:absolute;left:6px;top:9px;width:19px;height:19px;
  display:flex;align-items:center;justify-content:center;line-height:1;
  color:#fff;font-size:.75rem;font-weight:700;
}
.article .check-item.checked{color:var(--ink-soft);text-decoration:line-through;opacity:.8}
.article strong{color:var(--heading)}
.article hr{border:none;border-top:1px solid var(--line);margin:2em 0}
.article blockquote{
  margin:1em 0;padding:.8em 1em;background:var(--sage-100);border-left:4px solid var(--sage-400);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}
.table-wrap{overflow-x:auto;margin:1em 0;border:1px solid var(--line);border-radius:var(--radius-sm)}
.article table{border-collapse:collapse;width:100%;font-size:.92rem;min-width:480px}
.article th{background:var(--sage-100);text-align:left;padding:9px 12px;font-family:var(--font-body);color:var(--heading)}
.article td{padding:9px 12px;border-top:1px solid var(--line)}
.article em{color:var(--ink-soft)}

/* Callouts based on emoji-leading paragraphs handled via JS wrapping */
.callout{
  border-radius:12px;padding:16px 18px;margin:1.4em 0;line-height:1.6;
  border:1px solid var(--line);border-left:5px solid var(--line);background:var(--sage-50);
}
.callout.warn{background:var(--danger-bg);border-color:#f0c7c0;border-left-color:var(--danger)}
.callout.tip{background:var(--sage-100);border-color:var(--sage-200);border-left-color:var(--sage-600)}
.callout.key{background:#fdf1e0;border-color:#f0dcb0;border-left-color:var(--mustard)}
.callout.ok{background:#eaf5e6;border-color:#cfe8c6;border-left-color:var(--sage-500)}
.callout.recipe{background:var(--paper);border:1.5px solid var(--sage-300);border-left:5px solid var(--sage-600)}

/* Lesson footer / nav */
.lesson-actions{display:flex;align-items:center;gap:12px;margin:34px 0 10px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:30px;border:none;
  font-weight:700;font-size:.92rem;text-decoration:none;
}
.btn-primary{background:var(--sage-600);color:#fff}
.btn-primary:hover{background:var(--sage-700)}
.btn-primary.done{background:var(--sage-800)}
.btn-ghost{background:transparent;color:var(--heading-soft);border:1px solid var(--sage-300)}

.prevnext{display:flex;justify-content:space-between;gap:12px;margin-top:28px;border-top:1px solid var(--line);padding-top:20px}
.prevnext a{flex:1;text-decoration:none;color:var(--ink);padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-md);font-size:.85rem}
.prevnext a:hover{background:var(--sage-100)}
.prevnext .lbl{display:block;color:var(--ink-soft);font-size:.72rem;text-transform:uppercase;margin-bottom:3px}
.prevnext .next{text-align:right}

.reading-time{color:var(--ink-soft);font-size:.85rem}

/* ===================== HOME / DASHBOARD ===================== */
.home-hero{
  background:linear-gradient(135deg,var(--sage-700),var(--sage-600));
  color:#fff;border-radius:var(--radius-lg);padding:34px 28px;margin-bottom:26px;
  position:relative;overflow:hidden;
}
.home-hero h1{color:#fff;font-size:1.9rem}
.home-hero p{color:#e4ead9;max-width:520px}
.home-hero .hero-stats{display:flex;gap:22px;margin-top:18px;flex-wrap:wrap}
.hero-stat{background:rgba(255,255,255,.12);border-radius:var(--radius-md);padding:10px 16px;min-width:100px}
.hero-stat b{display:block;font-size:1.3rem}
.hero-stat span{font-size:.75rem;opacity:.85}

.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin-bottom:30px}
.module-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px;
  text-decoration:none;color:var(--ink);display:flex;flex-direction:column;gap:8px;
  box-shadow:var(--shadow-sm);transition:transform .15s ease, box-shadow .15s ease;
}
.module-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.module-card.is-premium{background:var(--premium-bg);border-color:#e6d4a0}
.module-card .icon-wrap{
  width:46px;height:46px;border-radius:14px;background:var(--sage-100);display:flex;align-items:center;justify-content:center;font-size:1.4rem;
}
.module-card.is-premium .icon-wrap{background:#f2e4bb}
.module-card .card-img{
  margin:-20px -20px 0 -20px;height:150px;overflow:hidden;
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;
}
.module-card .card-img img{width:100%;height:100%;object-fit:cover;display:block}
.module-card h3{font-size:1.05rem;margin-bottom:2px}
.module-card p{font-size:.85rem;color:var(--ink-soft);margin-bottom:8px}
.module-card .prog-line{height:6px;background:var(--sage-100);border-radius:20px;overflow:hidden;margin-top:auto}
.module-card .prog-line .fill{height:100%;background:var(--sage-500)}
.module-card.is-premium .prog-line .fill{background:var(--premium-gold)}
.module-card .prog-label{font-size:.72rem;color:var(--ink-soft);margin-top:4px}
/* premium-bg stays a fixed light cream regardless of theme, so its own
   text colors must stay fixed too instead of following the dark-mode inversion */
.module-card.is-premium h3{color:#31432a}
.module-card.is-premium p,
.module-card.is-premium .prog-label{color:#5c6355}

/* Filters */
.filters-bar{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 22px}
.chip{
  border:1px solid var(--line);background:var(--paper);border-radius:20px;padding:7px 14px;font-size:.82rem;color:var(--ink-soft);
}
.chip.active{background:var(--sage-600);color:#fff;border-color:var(--sage-600)}

/* ===================== ACHIEVEMENTS PANEL ===================== */
.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.ach-card{border:1px solid var(--line);border-radius:var(--radius-md);padding:14px;text-align:center;background:var(--paper)}
.ach-card .ic{font-size:1.7rem;margin-bottom:6px}
.ach-card h5{font-size:.8rem;margin:0 0 4px;color:var(--heading)}
.ach-card p{font-size:.7rem;color:var(--ink-soft);margin:0}
.ach-card.locked{opacity:.35;filter:grayscale(1)}

/* ===================== MODALS / DRAWERS ===================== */
.overlay{position:fixed;inset:0;background:rgba(30,35,25,.4);z-index:70;opacity:0;pointer-events:none;transition:opacity .2s}
.overlay.open{opacity:1;pointer-events:auto}
.panel{
  position:fixed;top:0;right:0;height:100%;width:min(420px,92vw);background:var(--paper);z-index:80;
  transform:translateX(100%);transition:transform .25s ease;display:flex;flex-direction:column;
  box-shadow:-8px 0 24px rgba(0,0,0,.15);
}
.panel.open{transform:translateX(0)}
.panel-header{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}
.panel-body{padding:16px 18px;overflow-y:auto;flex:1}

.mobile-drawer{
  position:fixed;top:0;left:0;height:100%;width:min(300px,85vw);background:var(--paper);z-index:80;
  transform:translateX(-100%);transition:transform .25s ease;overflow-y:auto;padding:16px 10px;
}
.mobile-drawer.open{transform:translateX(0)}

/* FAQ / search assistant */
.search-box{position:relative;margin-bottom:14px}
.search-box input{
  width:100%;padding:11px 14px;border-radius:20px;border:1px solid var(--line);font-size:.9rem;font-family:inherit;
}
.faq-item{border-bottom:1px solid var(--line);padding:12px 0}
.faq-item h5{font-size:.88rem;margin:0 0 4px;color:var(--heading)}
.faq-item p{font-size:.83rem;color:var(--ink-soft);margin:0 0 6px}
.faq-item a{font-size:.78rem;font-weight:600;text-decoration:none}
.search-results-empty{color:var(--ink-soft);font-size:.85rem;padding:20px 0;text-align:center}

/* FAB buttons */
.fab-stack{position:fixed;right:18px;bottom:18px;display:flex;flex-direction:column;gap:10px;z-index:50}
.fab{
  width:52px;height:52px;border-radius:50%;background:var(--sage-600);color:#fff;border:none;
  display:flex;align-items:center;justify-content:center;font-size:1.3rem;box-shadow:var(--shadow-md);
}
.fab.top{background:var(--paper);color:var(--heading-soft);border:1px solid var(--line);width:42px;height:42px;font-size:1.1rem;opacity:0;pointer-events:none;transition:opacity .2s}
.fab.top.show{opacity:1;pointer-events:auto}
.fab.chat{background:var(--terracotta)}

/* Downloads / gifts cards */
.download-card{border:1px dashed var(--line);border-radius:var(--radius-md);padding:16px;display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px;background:var(--paper);flex-wrap:wrap}
.download-card.ready{border-style:solid;border-color:var(--sage-300)}
.dl-status{font-size:.72rem;padding:4px 10px;border-radius:20px;background:var(--sage-100);color:var(--ink-soft)}
.dl-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;flex:none}
.dl-actions .btn{padding:9px 16px;font-size:.85rem;white-space:nowrap;justify-content:center}

/* PDF preview modal */
.pdf-modal{
  position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);
  width:90vw;max-width:800px;height:90vh;z-index:86;
  background:var(--paper);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);
  overflow:hidden;opacity:0;pointer-events:none;transition:opacity .2s;
}
.pdf-modal.open{opacity:1;pointer-events:auto}
.pdf-modal iframe{width:100%;height:100%;border:none;display:block}
.pdf-modal-close{
  position:absolute;top:10px;right:10px;z-index:2;width:36px;height:36px;border-radius:50%;border:none;
  background:rgba(20,22,17,.6);color:#fff;font-size:1rem;display:flex;align-items:center;justify-content:center;
}
@media (max-width:600px){
  .pdf-modal{width:96vw;height:92vh;border-radius:14px}
}
.dl-status.ready{background:var(--sage-200);color:var(--sage-800)}

/* Language selector */
.lang-select{border:1px solid var(--line);border-radius:20px;padding:6px 10px;font-size:.8rem;background:var(--paper);color:var(--ink)}

/* Toast + confetti */
#toast-region{position:fixed;top:14px;left:50%;transform:translateX(-50%);z-index:90;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{background:var(--sage-800);color:#fff;padding:12px 20px;border-radius:30px;font-size:.88rem;font-weight:600;box-shadow:var(--shadow-md);animation:toastIn .3s ease}
.toast.level{background:linear-gradient(90deg,var(--terracotta),var(--mustard))}
@keyframes toastIn{from{opacity:0;transform:translateY(-14px)}to{opacity:1;transform:translateY(0)}}
#confetti-canvas{position:fixed;inset:0;pointer-events:none;z-index:95}

.install-banner{
  position:fixed;bottom:0;left:0;right:0;background:var(--sage-800);color:#fff;padding:12px 16px;
  display:none;align-items:center;justify-content:space-between;gap:12px;z-index:55;
}
.install-banner.show{display:flex}
.install-banner button{background:var(--mustard);color:var(--ink);border:none;border-radius:20px;padding:8px 16px;font-weight:700;font-size:.85rem}
.install-banner .dismiss{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 960px){
  .sidebar{display:none}
  .drawer-toggle{display:flex}
  .drawer-backdrop{
    display:block;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:75;opacity:0;pointer-events:none;transition:opacity .2s;
  }
  .drawer-backdrop.open{opacity:1;pointer-events:auto}
  .home-hero h1{font-size:1.5rem}
  .content-wrap{padding:22px 16px 90px}
  .main-col.reading-mode .content-wrap{padding:28px 24px;margin:20px auto 50px}
}
@media (max-width: 480px){
  .module-grid{grid-template-columns:1fr}
  .hero-stat{min-width:80px}
  .download-card{flex-direction:column;align-items:stretch}
  .dl-actions{justify-content:stretch}
  .lesson-header h1{font-size:1.6rem}
  .dl-actions .btn{flex:1}
  .main-col.reading-mode .content-wrap{padding:24px 20px;margin:14px auto 40px;border-radius:14px}
}

/* Utility */
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.empty-note{color:var(--ink-soft);font-size:.85rem;text-align:center;padding:30px 0}