*,*::before,*::after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:72px}body{margin:0;background:var(--bg);color:var(--ink);font:400 var(--fs)/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased;padding-bottom:calc(68px + env(safe-area-inset-bottom,0px))}img,svg{max-width:100%;height:auto}a{color:var(--link);text-underline-offset:.18em;text-decoration-thickness:.08em}a:hover{color:var(--link-h)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}h1,h2,h3{line-height:1.22;letter-spacing:-.01em;color:var(--ink-strong);text-wrap:balance}h1{font-size:clamp(1.75rem,6vw,2.5rem);margin:.2em 0 .45em}h2{font-size:clamp(1.3rem,4.4vw,1.7rem);margin:1.8em 0 .5em}h3{font-size:1.15rem;margin:1.5em 0 .4em}p,ul,ol{margin:0 0 1em}code{font:500 .9em ui-monospace,"SF Mono",Menlo,Consolas,monospace;background:var(--code-bg);padding:.12em .38em;border-radius:6px}.sr-only{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}[hidden]{display:none!important}.skip{position:absolute;left:-999px;top:8px;z-index:99;background:var(--accent);color:var(--on-accent);padding:10px 14px;border-radius:10px}.skip:focus{left:8px}.ico{width:22px;height:22px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.topbar{position:sticky;top:0;z-index:30;background:var(--bar);-webkit-backdrop-filter:saturate(1.6) blur(12px);backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top,0px)}.topbar-in{max-width:var(--wide);margin:0 auto;display:flex;align-items:center;gap:12px;min-height:56px;padding:0 12px}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink-strong);font-weight:700;letter-spacing:-.01em;margin-right:auto;min-height:44px}.brand-logo{width:32px;height:32px;border-radius:var(--r-logo)}.brand-name b{color:var(--accent);font-weight:800}.topnav{display:none}.topbar-act{display:flex;gap:4px}.icon-btn{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;border:0;background:transparent;color:var(--ink);cursor:pointer}.icon-btn:hover{background:var(--soft)}.ico-sun{display:none}[data-theme=dark] .ico-sun{display:block}[data-theme=dark] .ico-moon{display:none}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ico-sun{display:block}:root:not([data-theme=light]) .ico-moon{display:none}}.main{display:block;max-width:var(--read);margin:0 auto;padding:12px 16px 32px}.main-home,.main-hub,.main-404{max-width:var(--wide)}.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px;padding:0;margin:4px 0 8px;font-size:.84rem;color:var(--muted)}.crumbs li:not(:last-child)::after{content:"›";margin-left:6px;color:var(--muted)}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--link);text-decoration:underline}.lead{font-size:1.1em;color:var(--ink-2)}.prose ul,.prose ol{padding-left:1.25em}.prose li{margin:.3em 0}.note{color:var(--muted);font-size:.92rem}.page-head{margin-bottom:12px}.hero{padding:20px 0 6px}.hero-kicker{display:inline-block;margin:0 0 6px;font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}.hero h1{max-width:20ch}.hero-sub{font-size:1.06em;color:var(--ink-2);max-width:56ch}.searchbox{position:relative;display:flex;align-items:center;margin:14px 0 10px;max-width:640px}.searchbox .ico{position:absolute;left:14px;color:var(--muted);pointer-events:none}.searchbox input{width:100%;min-height:52px;padding:0 16px 0 46px;font:inherit;color:var(--ink);background:var(--card);border:1.5px solid var(--line-2);border-radius:var(--r-input);box-shadow:var(--shadow-1);-webkit-appearance:none;appearance:none}.searchbox input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--ring)}.chips{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 10px;margin:0 -16px;padding-left:16px;scrollbar-width:none;-webkit-overflow-scrolling:touch}.chips::-webkit-scrollbar{display:none}.chip{flex:none;display:inline-flex;align-items:center;gap:6px;min-height:38px;padding:0 14px;border-radius:999px;background:var(--soft);color:var(--ink);text-decoration:none;font-size:.9rem;font-weight:600;border:1px solid var(--line)}.chip:hover{background:var(--soft-2);color:var(--ink-strong)}.chip-btn{font:inherit;font-size:.86rem;cursor:pointer}.chip-btn .ico{width:17px;height:17px}.block{margin-top:28px}.block h2{margin-top:0}.sections{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr));gap:12px}.section>a,.section>div{position:relative;display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto 1fr;column-gap:12px;row-gap:2px;height:100%;padding:16px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);text-decoration:none;color:var(--ink);box-shadow:var(--shadow-1);transition:transform .15s,border-color .15s}.section>a:hover{transform:translateY(-2px);border-color:var(--accent)}.ico-sec{grid-row:span 2;width:42px;height:42px;padding:9px;border-radius:12px;background:var(--accent-soft);color:var(--accent)}.section-name{font-weight:700;color:var(--ink-strong)}.section-desc{font-size:.9rem;color:var(--muted);line-height:1.45}.is-soon>div{opacity:.72;box-shadow:none}.badge{position:absolute;top:12px;right:12px;font-size:.7rem;font-weight:700;padding:3px 8px;border-radius:999px;background:var(--soft-2);color:var(--muted)}.about-block p{max-width:62ch}.link-list{display:flex;flex-wrap:wrap;gap:8px 18px;padding-left:1.1em}.cards{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));gap:12px}.card a{display:flex;flex-direction:column;gap:4px;height:100%;padding:14px 16px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);text-decoration:none;color:var(--ink);box-shadow:var(--shadow-1);transition:border-color .15s,transform .15s}.card a:hover{border-color:var(--accent);transform:translateY(-2px)}.card-tag{align-self:flex-start;font-size:.72rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--accent)}.card-title{font-weight:700;color:var(--ink-strong);line-height:1.3}.card-desc{font-size:.9rem;color:var(--muted);line-height:1.45}.search-status{color:var(--muted);font-size:.9rem;margin:4px 0 14px}.meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;font-size:.86rem;color:var(--muted);margin:-4px 0 18px}.resumen{margin:0 0 22px;padding:14px 16px;border-radius:var(--r-card);background:var(--accent-soft);border:1px solid var(--accent-line)}.resumen-h{display:flex;align-items:center;gap:8px;margin:0 0 6px;font-weight:800;color:var(--ink-strong)}.resumen-h .ico{color:var(--accent)}.resumen ul{margin:0;padding-left:1.15em}.faq{margin-top:34px}.faq-item{border:1px solid var(--line);border-radius:var(--r-card);background:var(--card);margin-bottom:8px}.faq-item summary{cursor:pointer;list-style:none;padding:14px 44px 14px 16px;font-weight:700;color:var(--ink-strong);position:relative;min-height:48px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary::after{content:"+";position:absolute;right:16px;top:11px;font-size:1.3rem;color:var(--accent);transition:transform .2s}.faq-item[open] summary::after{transform:rotate(45deg)}.faq-a{padding:0 16px 12px}.related{margin-top:34px}.ph-card{margin:34px 0 8px;padding:18px;border-radius:var(--r-card);background:var(--ph-bg);border:1px solid var(--line);box-shadow:var(--shadow-1)}.ph-kicker{display:flex;align-items:center;gap:6px;margin:0 0 4px;font-size:.74rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--accent)}.ph-kicker .ico{width:16px;height:16px}.ph-title{margin:0 0 4px;font-size:1.15rem;font-weight:800;color:var(--ink-strong)}.ph-text{margin:0 0 12px;color:var(--ink-2)}.ph-note{margin:10px 0 0;font-size:.76rem;color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border-radius:var(--r-btn);font:inherit;font-weight:700;text-decoration:none;cursor:pointer;border:1.5px solid transparent}.btn .ico{width:18px;height:18px}.btn-primary{background:var(--accent);color:var(--on-accent)}.btn-primary:hover{background:var(--accent-h);color:var(--on-accent)}.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}.btn-ghost:hover{background:var(--soft)}.contact-mail{display:flex;align-items:center;gap:10px;font-size:1.15rem;font-weight:700;padding:14px 16px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card)}.contact-mail .ico{color:var(--accent)}.footer{border-top:1px solid var(--line);background:var(--footer);margin-top:40px}.footer-in{max-width:var(--wide);margin:0 auto;padding:28px 16px 20px;font-size:.92rem;color:var(--ink-2)}.footer-name{font-weight:800;font-size:1.05rem;color:var(--ink-strong);margin:0 0 2px}.footer-name b{color:var(--accent)}.footer-cols{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0}.footer-h{font-weight:800;color:var(--ink-strong);margin:0 0 6px}.footer ul{list-style:none;padding:0;margin:0}.footer li{margin:0}.footer li a,.footer li span{display:inline-block;padding:5px 0;color:var(--ink-2);text-decoration:none}.footer li a:hover{color:var(--link);text-decoration:underline}.soon{opacity:.6}.footer-ph{padding:12px 0;border-top:1px solid var(--line);margin:0}.footer-legal{font-size:.8rem;color:var(--muted);margin:6px 0 0}.bottomnav{position:fixed;left:0;right:0;bottom:0;z-index:40;display:grid;grid-template-columns:repeat(5,1fr);background:var(--bar);-webkit-backdrop-filter:saturate(1.6) blur(14px);backdrop-filter:saturate(1.6) blur(14px);border-top:1px solid var(--line);padding:4px 4px env(safe-area-inset-bottom,0px)}.bottomnav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:56px;font-size:.68rem;font-weight:600;color:var(--muted);text-decoration:none;border-radius:12px}.bottomnav a[aria-current=page]{color:var(--accent)}.bottomnav a[aria-current=page] .ico{background:var(--accent-soft);border-radius:999px;padding:2px 12px;width:46px}.bottomnav .ico{width:22px;height:22px;box-sizing:content-box}.sheet{position:fixed;inset:0;z-index:50;background:rgba(10,15,25,.45);display:flex;align-items:flex-end}.sheet-panel{width:100%;background:var(--card);border-radius:20px 20px 0 0;padding:18px 18px calc(18px + env(safe-area-inset-bottom,0px));box-shadow:0 -10px 40px rgba(0,0,0,.25);animation:up .22s ease-out}.sheet-h{font-weight:800;margin:0 0 6px;color:var(--ink-strong)}.sheet ul{list-style:none;padding:0;margin:0 0 14px}.sheet li a{display:block;padding:12px 2px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none;font-weight:600}@keyframes up{from{transform:translateY(30px);opacity:0}}.to-top{position:fixed;right:14px;bottom:calc(80px + env(safe-area-inset-bottom,0px));z-index:35;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--ink);box-shadow:var(--shadow-2);display:grid;place-items:center;cursor:pointer}.toast{position:fixed;left:50%;bottom:calc(86px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);z-index:60;background:var(--ink-strong);color:var(--bg);padding:10px 16px;border-radius:12px;font-size:.9rem;font-weight:600}@media (min-width:900px){body{padding-bottom:0}.bottomnav,.sheet{display:none!important}.to-top{bottom:24px}.topbar-in{padding:0 20px;min-height:64px}.topnav{display:flex;gap:2px;margin-right:8px}.topnav a{padding:8px 10px;border-radius:10px;color:var(--ink-2);text-decoration:none;font-weight:600;font-size:.92rem}.topnav a:hover{background:var(--soft);color:var(--ink-strong)}.main{padding:20px 24px 40px}.hero{padding:44px 0 12px}.chips{margin:0;padding-left:2px;flex-wrap:wrap;overflow:visible}.footer-in{display:grid;grid-template-columns:1.2fr 2fr;gap:12px 40px;padding:36px 24px 24px}.footer-cols{margin:0}.footer-ph,.footer-legal{grid-column:1/-1}}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media print{.topbar,.bottomnav,.footer,.ph-card,.sheet,.to-top,.chips,.searchbox,.meta .chip-btn,.crumbs{display:none!important}body{background:#fff;color:#000;padding:0;font-size:12pt}.main{max-width:none;padding:0}a{color:#000}.faq-item{break-inside:avoid}}:root{--fs:18px;--read:720px;--wide:1100px;--r-card:18px;--r-input:999px;--r-btn:999px;--r-logo:10px;--bg:#fff;--card:#fff;--bar:rgba(255,255,255,.9);--footer:#f2f5fc;--ink:#1d2738;--ink-2:#3a4558;--ink-strong:#0c1526;--muted:#5a6578;--line:#e2e7f1;--line-2:#cad3e3;--soft:#f0f4fc;--soft-2:#e4ebf8;--code-bg:#edf2fc;--accent:#1f4fd1;--accent-h:#1a42ae;--on-accent:#fff;--accent-soft:#e8eefc;--accent-line:#c7d5f7;--ring:rgba(31,79,209,.2);--focus:#1f4fd1;--link:#1c47bd;--link-h:#143591;--progress:#16a34a;--lv1:#1f4fd1;--lv2:#7c3aed;--lv3:#0f8a7e;--lv4:#c2410c;--lvia:#b8239e;--ph-bg:linear-gradient(135deg,#ecf1fd,#f1f9f4);--shadow-1:0 1px 3px rgba(15,30,70,.07);--shadow-2:0 10px 28px rgba(15,30,70,.14)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0f1b2d;--card:#16263d;--bar:rgba(15,27,45,.88);--footer:#0b1524;--ink:#d6e0ef;--ink-2:#b2c0d6;--ink-strong:#f0f5fc;--muted:#8fa0ba;--line:#22344f;--line-2:#304662;--soft:#1a2d48;--soft-2:#223857;--code-bg:#13233a;--accent:#79a0ff;--accent-h:#9bb8ff;--on-accent:#0a1428;--accent-soft:#1c3156;--accent-line:#2f4c80;--ring:rgba(121,160,255,.25);--focus:#9bb8ff;--link:#9bb8ff;--link-h:#c0d2ff;--progress:#4ade80;--lv1:#79a0ff;--lv2:#b794f6;--lv3:#4fd1c5;--lv4:#f6995a;--lvia:#f07ad8;--ph-bg:linear-gradient(135deg,#1a2e50,#16263d);--shadow-1:none;--shadow-2:0 10px 28px rgba(0,0,0,.45)}}[data-theme=dark]{--bg:#0f1b2d;--card:#16263d;--bar:rgba(15,27,45,.88);--footer:#0b1524;--ink:#d6e0ef;--ink-2:#b2c0d6;--ink-strong:#f0f5fc;--muted:#8fa0ba;--line:#22344f;--line-2:#304662;--soft:#1a2d48;--soft-2:#223857;--code-bg:#13233a;--accent:#79a0ff;--accent-h:#9bb8ff;--on-accent:#0a1428;--accent-soft:#1c3156;--accent-line:#2f4c80;--ring:rgba(121,160,255,.25);--focus:#9bb8ff;--link:#9bb8ff;--link-h:#c0d2ff;--progress:#4ade80;--lv1:#79a0ff;--lv2:#b794f6;--lv3:#4fd1c5;--lv4:#f6995a;--lvia:#f07ad8;--ph-bg:linear-gradient(135deg,#1a2e50,#16263d);--shadow-1:none;--shadow-2:0 10px 28px rgba(0,0,0,.45)}.sections li:nth-child(1) .ico-sec{color:var(--lv1)}.sections li:nth-child(2) .ico-sec{color:var(--lv2)}.sections li:nth-child(3) .ico-sec{color:var(--lv3)}.sections li:nth-child(4) .ico-sec{color:var(--lv4)}.sections li:nth-child(5) .ico-sec{color:var(--lvia)}.ico-sec{border-radius:50%}.hero h1{font-weight:800}.progress{height:10px;border-radius:999px;background:var(--soft-2);overflow:hidden;margin:8px 0}.progress>span{display:block;height:100%;width:0;background:var(--progress);border-radius:inherit;transition:width .4s}.ejercicio{margin:24px 0;padding:16px 18px;border-radius:var(--r-card);border:2px solid var(--progress);background:color-mix(in srgb,var(--progress) 8%,var(--card))}.ejercicio-h{font-weight:800;color:var(--ink-strong);margin:0 0 6px}.lesson-nav{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:28px 0}.lesson-nav a{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-card);text-decoration:none;background:var(--card)}.lesson-nav a:last-child{text-align:right}