/* ===== Kriaturas — hoja de estilos compartida ===== */
:root{
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --font-head:'Sora',var(--font-body);
  --font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --maxw:46rem;
  --radius:14px;
  --radius-sm:9px;
  --transition:.18s ease;
}
/* ---- Tema claro ---- */
:root,[data-theme="light"]{
  --page:#f4f5f8;
  --surface:#ffffff;
  --surface-2:#f6f7fa;
  --text:#1b2230;
  --text-soft:#525d70;
  --text-faint:#7c8698;
  --border:#e4e7ee;
  --border-strong:#d2d7e2;
  --brand:#6d5ae6;
  --brand-strong:#5a47c9;
  --brand-soft:#efedfd;
  --accent:#11a3b8;
  --link:#5a47c9;
  /* cajas */
  --c-porque-bg:#efedfd; --c-porque-bd:#6d5ae6; --c-porque-tx:#3a2e8f;
  --c-ejercicio-bg:#e7f6ec; --c-ejercicio-bd:#2ba45c; --c-ejercicio-tx:#1c6e3c;
  --c-errores-bg:#fcf2db; --c-errores-bd:#df982b; --c-errores-tx:#8a5a12;
  --c-glosario-bg:#e7f0fb; --c-glosario-bd:#2f80d8; --c-glosario-tx:#1c5499;
  /* codigo */
  --code-bg:#f7f8fb; --code-bd:#e4e7ee; --code-tx:#27303f;
  --k-keyword:#6d5ae6; --k-string:#1f8a4d; --k-number:#c2562a;
  --k-func:#1c79b8; --k-comment:#8b94a4; --k-punct:#566074;
  --diagram-bg:#fbfbfd;
  --shadow:0 1px 2px rgba(20,25,40,.05),0 8px 24px rgba(20,25,40,.05);
}
/* ---- Tema oscuro ---- */
[data-theme="dark"]{
  --page:#0e1320;
  --surface:#151b29;
  --surface-2:#1a2130;
  --text:#e7eaf2;
  --text-soft:#aab3c5;
  --text-faint:#7d8699;
  --border:#27304a;
  --border-strong:#33405e;
  --brand:#9384ff;
  --brand-strong:#a99dff;
  --brand-soft:#221d3c;
  --accent:#3cccdd;
  --link:#a99dff;
  --c-porque-bg:#211c3d; --c-porque-bd:#8676f0; --c-porque-tx:#cbc3ff;
  --c-ejercicio-bg:#10301f; --c-ejercicio-bd:#37b86a; --c-ejercicio-tx:#8fe3ac;
  --c-errores-bg:#33270e; --c-errores-bd:#d9952c; --c-errores-tx:#f1cd8c;
  --c-glosario-bg:#0f2238; --c-glosario-bd:#4c95e6; --c-glosario-tx:#a9cdf3;
  --code-bg:#10151f; --code-bd:#28324a; --code-tx:#dbe2ee;
  --k-keyword:#b3a6ff; --k-string:#7fd6a0; --k-number:#f0a877;
  --k-func:#73c2ec; --k-comment:#768099; --k-punct:#9aa6bd;
  --diagram-bg:#0f1522;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{
  margin:0;background:var(--page);color:var(--text);
  font-family:var(--font-body);font-size:18px;line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--link);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
.skip-link{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;
  padding:.6rem 1rem;border-radius:0 0 var(--radius-sm) 0;z-index:60}
.skip-link:focus{left:0}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ===== Topbar ===== */
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:.75rem;
  height:60px;padding:0 1.1rem;background:color-mix(in srgb,var(--surface) 88%,transparent);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--border)}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--text);min-width:0}
.brand:hover{text-decoration:none}
.logo-mark{display:inline-flex;color:var(--brand)}
.logo-mark svg{width:30px;height:30px}
.brand-name{font-family:var(--font-head);font-weight:700;font-size:1.18rem;letter-spacing:-.01em}
.brand-tag{color:var(--text-faint);font-size:.85rem;border-left:1px solid var(--border-strong);
  padding-left:.6rem;margin-left:.1rem}
.topbar-actions{margin-left:auto;display:flex;align-items:center;gap:.4rem}
.theme-toggle,.nav-toggle{display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--border);background:var(--surface);
  border-radius:var(--radius-sm);color:var(--text-soft);cursor:pointer;transition:var(--transition)}
.theme-toggle:hover,.nav-toggle:hover{color:var(--text);border-color:var(--border-strong);background:var(--surface-2)}
.theme-toggle svg,.nav-toggle svg{width:20px;height:20px}
.nav-toggle{display:none}
.i-moon{display:none}
[data-theme="dark"] .i-sun{display:none}
[data-theme="dark"] .i-moon{display:inline}

/* ===== Layout ===== */
.layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:0;
  max-width:1240px;margin:0 auto}
.sidebar{position:sticky;top:60px;align-self:start;height:calc(100vh - 60px);overflow-y:auto;
  padding:1.6rem 1rem 2rem 1.4rem;border-right:1px solid var(--border)}
.sidebar-title{font-family:var(--font-head);font-size:.78rem;letter-spacing:.08em;
  text-transform:uppercase;color:var(--text-faint);margin:.2rem 0 .9rem .3rem}
.toc{list-style:none;margin:0;padding:0;counter-reset:none}
.toc-part{font-family:var(--font-head);font-size:.74rem;letter-spacing:.05em;text-transform:uppercase;
  color:var(--text-faint);margin:1.2rem 0 .35rem .3rem;font-weight:600}
.toc-part:first-child{margin-top:0}
.toc li a{display:flex;gap:.6rem;align-items:baseline;text-decoration:none;color:var(--text-soft);
  padding:.4rem .55rem;border-radius:var(--radius-sm);font-size:.95rem;line-height:1.35;transition:var(--transition)}
.toc li a:hover{background:var(--surface-2);color:var(--text);text-decoration:none}
.toc-num{font-family:var(--font-mono);font-size:.8rem;color:var(--text-faint);min-width:1.3em;text-align:right}
.toc li.active a{background:var(--brand-soft);color:var(--brand-strong);font-weight:600}
.toc li.active .toc-num{color:var(--brand-strong)}

/* ===== Chapter content ===== */
.chapter{padding:2.4rem clamp(1.1rem,4vw,3rem) 4rem}
.chapter article,.pager{max-width:var(--maxw);margin-inline:auto}
.eyebrow{font-family:var(--font-head);font-weight:600;font-size:.82rem;letter-spacing:.04em;
  text-transform:uppercase;color:var(--brand-strong);margin:0 0 .5rem}
.chapter h1{font-family:var(--font-head);font-weight:700;font-size:clamp(1.9rem,4.4vw,2.7rem);
  line-height:1.12;letter-spacing:-.02em;margin:0 0 1.4rem}
.chapter h2{font-family:var(--font-head);font-weight:600;font-size:1.5rem;line-height:1.25;
  letter-spacing:-.01em;margin:2.6rem 0 .9rem;padding-top:.4rem}
.chapter h3{font-family:var(--font-head);font-weight:600;font-size:1.18rem;margin:1.8rem 0 .6rem}
.chapter p{margin:0 0 1.15rem}
.lead>p:first-child{font-size:1.06rem;color:var(--text-soft)}
.chapter strong{font-weight:600}
.chapter ul,.chapter ol{margin:0 0 1.2rem;padding-left:1.4rem}
.chapter li{margin:.35rem 0}
.chapter li::marker{color:var(--text-faint)}
hr{border:none;border-top:1px solid var(--border);margin:2.2rem 0}

/* inline code */
code{font-family:var(--font-mono);font-size:.86em;background:var(--surface-2);
  border:1px solid var(--border);border-radius:6px;padding:.08em .38em}
[data-theme="dark"] code{background:#1f2738}

/* objetivos / blockquote */
.objetivos{margin:0 0 1.6rem;padding:1rem 1.2rem;background:var(--brand-soft);
  border:1px solid color-mix(in srgb,var(--brand) 30%,transparent);border-radius:var(--radius)}
.objetivos p{margin:0;color:var(--text)}
blockquote{margin:1.4rem 0;padding:.7rem 1.1rem;border-left:3px solid var(--accent);
  background:var(--surface-2);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-soft)}
blockquote p:last-child{margin-bottom:0}

/* ===== Cajas pedagógicas ===== */
.callout{display:flex;gap:1rem;margin:1.8rem auto;padding:1.15rem 1.3rem;
  max-width:var(--maxw);border:1px solid;border-radius:var(--radius);border-left-width:5px}
.callout-icon{flex:0 0 auto;width:30px;height:30px;display:flex;align-items:center;justify-content:center}
.callout-icon svg{width:26px;height:26px}
.callout-main{min-width:0;flex:1}
.callout-label{font-family:var(--font-head);font-weight:700;font-size:.78rem;letter-spacing:.06em;
  text-transform:uppercase;margin:.15rem 0 .55rem}
.callout-main>p:last-child,.callout-main>ul:last-child,.callout-main>ol:last-child{margin-bottom:0}
.callout p,.callout li{color:var(--text)}
.c-porque{background:var(--c-porque-bg);border-color:var(--c-porque-bd)}
.c-porque .callout-icon,.c-porque .callout-label{color:var(--c-porque-tx)}
.c-ejercicio{background:var(--c-ejercicio-bg);border-color:var(--c-ejercicio-bd)}
.c-ejercicio .callout-icon,.c-ejercicio .callout-label{color:var(--c-ejercicio-tx)}
.c-errores{background:var(--c-errores-bg);border-color:var(--c-errores-bd)}
.c-errores .callout-icon,.c-errores .callout-label{color:var(--c-errores-tx)}
.c-glosario{background:var(--c-glosario-bg);border-color:var(--c-glosario-bd)}
.c-glosario .callout-icon,.c-glosario .callout-label{color:var(--c-glosario-tx)}
.callout code{background:color-mix(in srgb,var(--surface) 55%,transparent);border-color:transparent}

/* ===== Código SQL ===== */
.code-wrap{margin:1.4rem 0;border:1px solid var(--code-bd);border-radius:var(--radius);overflow:hidden;background:var(--code-bg)}
.code-head{display:flex;align-items:center;justify-content:space-between;
  padding:.4rem .7rem .4rem .9rem;border-bottom:1px solid var(--code-bd);background:color-mix(in srgb,var(--code-bg) 60%,var(--surface-2))}
.code-lang{font-family:var(--font-head);font-size:.7rem;letter-spacing:.1em;font-weight:600;color:var(--text-faint)}
.copy-btn{font-family:var(--font-body);font-size:.78rem;color:var(--text-soft);background:transparent;
  border:1px solid var(--border);border-radius:6px;padding:.18rem .55rem;cursor:pointer;transition:var(--transition)}
.copy-btn:hover{color:var(--text);border-color:var(--border-strong);background:var(--surface)}
pre.code-block{margin:0;padding:1rem 1.1rem;overflow-x:auto;background:var(--code-bg)}
pre.code-block code{font-family:var(--font-mono);font-size:.86rem;line-height:1.6;background:none;border:none;padding:0;color:var(--code-tx)}
/* Prism tokens */
.token.keyword{color:var(--k-keyword);font-weight:600}
.token.string{color:var(--k-string)}
.token.number,.token.boolean{color:var(--k-number)}
.token.function{color:var(--k-func)}
.token.comment{color:var(--k-comment);font-style:italic}
.token.operator,.token.punctuation{color:var(--k-punct);background:none}

/* ===== Diagramas (ASCII + Mermaid) ===== */
.diagram{margin:1.5rem 0;padding:1rem;background:var(--diagram-bg);border:1px solid var(--border);
  border-radius:var(--radius);overflow-x:auto;text-align:center}
pre.ascii{margin:0;font-family:var(--font-mono);font-size:.8rem;line-height:1.35;color:var(--text-soft);
  white-space:pre;text-align:left;display:inline-block}
.diagram .mermaid{display:flex;justify-content:center}
.diagram .mermaid svg{max-width:100%;height:auto}

/* ===== Tablas ===== */
.table-wrap{margin:1.4rem 0;overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius)}
table{border-collapse:collapse;width:100%;font-size:.92rem}
thead th{background:var(--surface-2);font-family:var(--font-head);font-weight:600;text-align:left;
  color:var(--text-soft);font-size:.82rem;letter-spacing:.02em}
th,td{padding:.55rem .8rem;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:var(--surface-2)}
td code,th code{white-space:nowrap}

/* ===== Pager ===== */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:3rem;padding-top:1.6rem;border-top:1px solid var(--border)}
.pager-link{display:flex;flex-direction:column;gap:.2rem;padding:.9rem 1.1rem;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);text-decoration:none;color:var(--text);transition:var(--transition)}
.pager-link:hover{border-color:var(--brand);background:var(--brand-soft);text-decoration:none}
.pager-link.next{text-align:right}
.pager-dir{font-family:var(--font-head);font-size:.78rem;font-weight:600;color:var(--brand-strong)}
.pager-title{font-size:.95rem;color:var(--text-soft)}

/* ===== Footer ===== */
.site-footer{border-top:1px solid var(--border);padding:1.6rem;text-align:center;color:var(--text-faint);font-size:.88rem}

/* ===== Home ===== */
.home-main{max-width:60rem;margin:0 auto;padding:2.5rem clamp(1.1rem,4vw,2rem) 4rem}
.hero{text-align:center;padding:2.5rem 0 1rem}
.hero-kicker{font-family:var(--font-head);font-weight:600;letter-spacing:.04em;text-transform:uppercase;
  font-size:.85rem;color:var(--brand-strong);margin:0 0 .6rem}
.hero-title{font-family:var(--font-head);font-weight:700;font-size:clamp(3rem,9vw,5rem);margin:0;
  letter-spacing:-.03em;line-height:1}
.hero-sub{max-width:36rem;margin:1.1rem auto 0;color:var(--text-soft);font-size:1.1rem}
.hero-cta{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap;margin-top:1.8rem}
.btn-primary,.btn-ghost{font-family:var(--font-head);font-weight:600;text-decoration:none;
  padding:.7rem 1.3rem;border-radius:var(--radius-sm);transition:var(--transition);border:1px solid transparent}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-strong);text-decoration:none}
.btn-ghost{border-color:var(--border-strong);color:var(--text)}
.btn-ghost:hover{background:var(--surface-2);text-decoration:none}
.toc-wrap{margin-top:2.5rem}
.part{margin-bottom:2rem}
.part-title{font-family:var(--font-head);font-weight:600;font-size:1.05rem;color:var(--text-soft);
  margin:0 0 .9rem;padding-bottom:.5rem;border-bottom:1px solid var(--border)}
.cap-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:.8rem}
.cap-card{display:flex;align-items:center;gap:.9rem;padding:1rem 1.1rem;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);text-decoration:none;color:var(--text);transition:var(--transition)}
.cap-card:hover{border-color:var(--brand);background:var(--brand-soft);transform:translateY(-2px);text-decoration:none;box-shadow:var(--shadow)}
.cap-num{font-family:var(--font-mono);font-weight:500;font-size:1.1rem;color:var(--brand-strong);flex:0 0 auto}
.cap-title{font-size:.97rem;line-height:1.3}

/* ===== Drawer móvil ===== */
.nav-scrim{display:none}
@media (max-width:1023px){
  .nav-toggle{display:inline-flex;order:-1}
  .brand-tag{display:none}
  .layout{grid-template-columns:1fr}
  .sidebar{position:fixed;top:60px;left:0;width:300px;max-width:84vw;height:calc(100vh - 60px);
    background:var(--surface);border-right:1px solid var(--border);transform:translateX(-100%);
    transition:transform var(--transition);z-index:45}
  body.nav-open .sidebar{transform:translateX(0);box-shadow:var(--shadow)}
  body.nav-open .nav-scrim{display:block;position:fixed;inset:60px 0 0 0;background:rgba(8,10,18,.45);z-index:44}
}
@media (max-width:560px){
  body{font-size:17px}
  .brand-tag{display:none}
  .pager{grid-template-columns:1fr}
  .pager-link.next{text-align:left}
  th,td{white-space:normal}
}