/* Gauss House Academy — base común (lenguaje «bento»).
   Tokens, tipografía, cabecera, pie, botones, baldosas, formularios, documento legal, chat lateral. */

:root{
  --paper:#F2F1EC; --tile:#FFFFFF; --tile-2:#E6E4DC; --ink:#14161B; --text:#33363D; --muted:#5C606A;
  --line:#D6D3CA; --field:#8C8A83; --cobalt:#2340D8; --cobalt-d:#1A31A8; --lime:#D9F36A; --lime-d:#B9D63F;
  --err:#B42318;
  --r:18px; --r-s:10px; --wrap:1360px;
  --shadow:0 1px 2px rgba(20,22,27,.06),0 18px 40px -18px rgba(20,22,27,.28);
  --sans:'Onest',ui-sans-serif,system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --grid:linear-gradient(rgba(20,22,27,.07) 1px,transparent 1px) 0 0/22px 22px,linear-gradient(90deg,rgba(20,22,27,.07) 1px,transparent 1px) 0 0/22px 22px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);font:400 1.0625rem/1.62 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
@supports (overflow:clip){body{overflow-x:clip}}
h1,h2,h3,h4{color:var(--ink);font-family:var(--sans);font-weight:700;letter-spacing:-.025em;line-height:1.08;margin:0 0 .5em;text-wrap:balance}
h1{font-size:clamp(2.35rem,5vw,4.5rem);font-weight:800;letter-spacing:-.035em}
h2{font-size:clamp(1.85rem,3.3vw,2.9rem)}
h3{font-size:1.28rem;letter-spacing:-.015em;line-height:1.22}
p{margin:0 0 1em}
a{color:var(--cobalt);text-underline-offset:3px}
a:hover{color:var(--cobalt-d)}
img{max-width:100%;height:auto;display:block}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;z-index:100;border-radius:6px}
.skip:focus{left:8px;color:#fff}

/* ---------- maquetación ---------- */
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(16px,4vw,48px)}
.bleed{width:100vw;margin-left:calc(50% - 50vw)}
.sec{padding:clamp(56px,8vw,112px) 0}
.sec-tight{padding:clamp(36px,5vw,64px) 0}
.sec-head{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:16px 64px;align-items:end;margin-bottom:clamp(28px,4vw,52px)}
.sec-head h2{margin:0}
.sec-head p{margin:0;color:var(--muted)}
@media(max-width:820px){.sec-head{grid-template-columns:1fr}}

.eyebrow{font:500 .78rem/1.4 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 .9rem;display:flex;align-items:center;gap:.6rem}
.eyebrow::before{content:"";flex:none;width:.62rem;height:.62rem;background:var(--lime);border:1.5px solid var(--ink);border-radius:2px}
.lede{font-size:clamp(1.1rem,1.45vw,1.28rem);max-width:60ch}
.small{font-size:.9rem}
.muted{color:var(--muted)}
.mono,.num{font-family:var(--mono)}
.num{font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.tag{display:inline-block;font:500 .76rem/1 var(--mono);letter-spacing:.04em;text-transform:uppercase;padding:.45rem .62rem;border-radius:6px;background:var(--tile-2);color:var(--ink)}
.formula{font:500 .95rem/1.4 var(--mono);color:var(--ink);white-space:nowrap}
.price{font:700 1.35rem/1 var(--mono);color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.03em}

/* cabecera de páginas interiores */
.page-head{padding:clamp(40px,6vw,88px) 0 clamp(28px,4vw,52px);border-bottom:1px solid var(--line)}
.page-head h1{max-width:20ch}
.page-head .lede{color:var(--text)}

/* ---------- botones y enlaces ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:48px;padding:.7rem 1.25rem;border-radius:var(--r-s);border:1.5px solid var(--ink);background:transparent;color:var(--ink);font:600 1rem/1.2 var(--sans);text-decoration:none;cursor:pointer;transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease}
.btn:hover{transform:translateY(-2px);color:var(--ink);box-shadow:0 5px 0 -1px var(--ink)}
.btn-primary{background:var(--ink);color:var(--lime)}
.btn-primary:hover{color:var(--lime);background:#000}
.btn-cobalt{background:var(--cobalt);border-color:var(--ink);color:#fff}
.btn-cobalt:hover{color:#fff;background:var(--cobalt-d)}
.btn-lime{background:var(--lime);color:var(--ink)}
.btn-block{width:100%}
.btn[disabled]{opacity:.65;cursor:progress;transform:none;box-shadow:none}
.btns{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:1.6rem 0 0}
.link-arrow{font-weight:600;color:var(--ink);text-decoration:none;background:linear-gradient(var(--cobalt),var(--cobalt)) 0 100%/0 2px no-repeat;transition:background-size .35s ease;padding-bottom:2px}
.link-arrow::after{content:" →";font-family:var(--mono)}
.link-arrow:hover{background-size:100% 2px;color:var(--ink)}

/* ---------- baldosas (solo donde hay muchos elementos iguales) ---------- */
.tile{background:var(--tile);border-radius:var(--r);padding:clamp(20px,2.4vw,32px);position:relative;overflow:hidden}
.tile-cobalt{background:var(--cobalt);color:#fff}
.tile-cobalt h2,.tile-cobalt h3,.tile-cobalt .formula,.tile-cobalt a{color:#fff}
.tile-lime{background:var(--lime);color:var(--ink)}
.tile-ink{background:var(--ink);color:#D5D7DC}
.tile-ink h2,.tile-ink h3,.tile-ink .formula,.tile-ink a{color:#fff}
.tile-grid{background:var(--grid),var(--tile-2)}
.lift{transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s ease}
.lift:hover{transform:translateY(-4px);box-shadow:var(--shadow)}

/* curva de Gauss que se dibuja al entrar en pantalla: <svg class="curve rv"><path pathLength="1" …> */
.curve{overflow:visible}
.curve path{fill:none;stroke:currentColor;stroke-width:3;stroke-linecap:round}
.js .curve path{stroke-dasharray:1;stroke-dashoffset:1}
.js .curve.in path{animation:draw 1.8s cubic-bezier(.6,0,.2,1) .15s forwards}
@keyframes draw{to{stroke-dashoffset:0}}

/* ---------- aparición al hacer scroll (solo con JS, §7 BB) ---------- */
.js .rv{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.2,1)}
.js .rv.in{opacity:1;transform:none}
.rv[data-d="1"]{transition-delay:.08s}.rv[data-d="2"]{transition-delay:.16s}.rv[data-d="3"]{transition-delay:.24s}
.rv[data-d="4"]{transition-delay:.32s}.rv[data-d="5"]{transition-delay:.4s}

/* ---------- cabecera ---------- */
.top{position:sticky;top:0;z-index:40;background:rgba(242,241,236,.94);-webkit-backdrop-filter:saturate(1.3) blur(10px);backdrop-filter:saturate(1.3) blur(10px);border-bottom:1px solid transparent;transition:border-color .25s ease}
.top.scrolled{border-bottom-color:var(--line)}
.top-row{position:relative;display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:.7rem;margin-right:auto;color:var(--ink);text-decoration:none;font-weight:800;font-size:1.12rem;letter-spacing:-.02em;line-height:1}
.brand:hover{color:var(--ink)}
.brand small{display:block;margin-top:4px;font:500 .74rem/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.nav{display:flex;align-items:center;gap:2px}
.nav a{padding:.55rem .78rem;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:500;font-size:.97rem}
.nav a:hover,.nav a[aria-current="page"]{background:var(--tile-2);color:var(--ink)}
.nav .cart-pill{margin-left:10px;border:1.5px solid var(--ink);font:500 .92rem/1.2 var(--mono)}
.cart-pill b{display:inline-block;min-width:1.5em;margin-left:.3rem;padding:0 .35rem;background:var(--lime);border:1.5px solid var(--ink);border-radius:999px;text-align:center}
.nav-t{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.burger{display:none}
@media(max-width:1020px){
  .burger{display:grid;place-items:center;width:46px;height:46px;border:1.5px solid var(--ink);border-radius:10px;cursor:pointer}
  .burger span,.burger span::before,.burger span::after{display:block;width:18px;height:2px;background:var(--ink);content:""}
  .burger span{position:relative}
  .burger span::before{position:absolute;top:-6px}
  .burger span::after{position:absolute;top:6px}
  .nav-t:focus-visible+.burger{outline:3px solid var(--cobalt);outline-offset:3px}
  .nav{display:none;position:absolute;left:calc(-1 * clamp(16px,4vw,48px));right:calc(-1 * clamp(16px,4vw,48px));top:100%;flex-direction:column;align-items:stretch;gap:0;padding:10px clamp(16px,4vw,48px) 22px;background:var(--paper);border-bottom:1px solid var(--line)}
  .nav-t:checked~.nav{display:flex}
  .nav a{padding:.9rem .5rem;border-bottom:1px solid var(--line);border-radius:0}
  .nav .cart-pill{margin:14px 0 0;border-radius:var(--r-s);text-align:center}
}

/* ---------- pie ---------- */
.foot{background:var(--ink);color:#C9CBD1;padding:clamp(56px,7vw,96px) 0 0;overflow:hidden}
.foot p{margin:0 0 .8rem}
.foot a{color:#fff;text-decoration:none}
.foot a:hover{color:var(--lime)}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));gap:40px}
.foot-brand{display:flex;align-items:center;gap:.6rem;color:#fff;font-weight:800;font-size:1.15rem}
.foot-h{font:500 .76rem/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:#9A9DA6}
.foot-h-pay{margin-top:1.6rem!important}
.foot-list{list-style:none;margin:0;padding:0;display:grid;gap:.5rem}
.foot-legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;margin-top:52px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);font-size:.9rem}
.foot-legal p{margin:0}
.foot-mark{margin:36px 0 0!important;padding-left:clamp(12px,3vw,40px);height:.74em;overflow:hidden;white-space:nowrap;font:800 clamp(64px,15.5vw,250px)/.9 var(--sans);letter-spacing:-.055em;color:var(--lime);opacity:.14}
.pagos{display:flex;flex-wrap:wrap;gap:8px;margin:0}
.pagos img{height:26px;width:auto}
@media(max-width:900px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}}

/* ---------- formularios ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 18px}
.field{display:grid;gap:6px;align-content:start}
.field.full{grid-column:1/-1}
label{font-weight:600;color:var(--ink);font-size:.95rem}
input[type="text"],input[type="email"],input[type="number"],select,textarea{width:100%;min-height:48px;padding:.7rem .85rem;border:1.5px solid var(--field);border-radius:var(--r-s);background:#fff;color:var(--ink);font:400 1rem/1.4 var(--sans)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--cobalt);box-shadow:0 0 0 3px rgba(35,64,216,.22)}
textarea{min-height:120px;resize:vertical}
.err{margin:0;color:var(--err);font-size:.88rem}
.err:empty{display:none}
.field.bad input,.field.bad select,.field.bad textarea{border-color:var(--err)}
.check{display:grid;grid-template-columns:22px 1fr;gap:10px;align-items:start;font-weight:400;color:var(--text)}
.check input{width:20px;height:20px;margin:3px 0 0;accent-color:var(--cobalt)}
.notice{margin:0 0 1rem;padding:.8rem 1rem;border-radius:var(--r-s);background:var(--lime);color:var(--ink);font-weight:500}
.notice-err{background:#FDE7E5;color:#8A1C13}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
@media(max-width:640px){.form-grid{grid-template-columns:1fr}}

/* ---------- documento legal: columna de lectura + índice ---------- */
.doc{display:grid;grid-template-columns:240px minmax(0,70ch);gap:clamp(32px,6vw,96px);align-items:start;padding:clamp(40px,6vw,80px) 0 clamp(56px,8vw,112px)}
.doc-toc{position:sticky;top:96px;font-size:.92rem}
.doc-toc p{font:500 .76rem/1.2 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.doc-toc ol{list-style:none;margin:0;padding:0;border-left:2px solid var(--line);counter-reset:t}
.doc-toc li{counter-increment:t}
.doc-toc a{display:block;margin-left:-2px;padding:.36rem 0 .36rem 1rem;border-left:2px solid transparent;color:var(--text);text-decoration:none}
.doc-toc a::before{content:counter(t,decimal-leading-zero) "\00a0\00a0";font-family:var(--mono);color:var(--muted)}
.doc-toc a:hover{color:var(--ink);border-left-color:var(--cobalt)}
.doc-body h2{display:flex;gap:.8rem;align-items:baseline;font-size:1.5rem;margin:2.8rem 0 .8rem;scroll-margin-top:96px}
.doc-body h2:first-child{margin-top:0}
.doc-body h2 .n{font:500 .9rem/1 var(--mono);color:var(--cobalt)}
.doc-body h3{font-size:1.1rem;margin:1.6rem 0 .5rem}
.doc-body ul,.doc-body ol{padding-left:1.25rem}
.doc-body li{margin:.3rem 0}
.doc-table{overflow-x:auto;margin:1rem 0 1.6rem}
.doc-table table{width:100%;border-collapse:collapse;font-size:.94rem}
.doc-table th,.doc-table td{text-align:left;vertical-align:top;padding:.65rem .8rem;border-top:1px solid var(--line)}
.doc-table thead th{border-top:0;border-bottom:2px solid var(--ink);font:600 .78rem/1.3 var(--mono);letter-spacing:.05em;text-transform:uppercase;color:var(--ink)}
@media(max-width:900px){.doc{grid-template-columns:1fr}.doc-toc{position:static}}

/* ---------- chat: pestaña vertical en el borde + cortina lateral ---------- */
.ask-tab{position:fixed;right:0;top:50%;z-index:60;transform:translateY(-50%) rotate(180deg);writing-mode:vertical-rl;padding:1.15rem .62rem;border:1.5px solid var(--ink);border-left:0;border-radius:0 12px 12px 0;background:var(--cobalt);color:#fff;font:600 .92rem/1 var(--sans);letter-spacing:.01em;cursor:pointer;box-shadow:var(--shadow);transition:padding .25s ease,background-color .25s ease}
.ask-tab span::after{content:"";display:inline-block;width:.55rem;height:.55rem;margin-top:.6rem;background:var(--lime);border-radius:2px;animation:blink 1.6s steps(1) infinite}
.ask-tab:hover{padding-left:.95rem;background:var(--cobalt-d)}
.ask{position:fixed;top:0;right:0;bottom:0;z-index:70;width:min(440px,100vw);display:flex;flex-direction:column;background:var(--paper);border-left:1.5px solid var(--ink);box-shadow:-30px 0 60px -30px rgba(20,22,27,.45);animation:askIn .38s cubic-bezier(.2,.8,.2,1)}
.ask[hidden]{display:none}
@keyframes askIn{from{transform:translateX(100%)}to{transform:none}}
@keyframes blink{50%{opacity:0}}
.ask-h{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:var(--grid),var(--tile-2);border-bottom:1.5px solid var(--ink)}
.ask-prompt{margin:0;font:500 .92rem/1.3 var(--mono);color:var(--ink)}
.ask-prompt b{color:var(--cobalt);font-weight:700}
.ask-prompt::after{content:"▍";margin-left:.2rem;color:var(--ink);animation:blink 1s steps(1) infinite}
.ask-x{flex:none;width:42px;height:42px;border:1.5px solid var(--ink);border-radius:8px;background:#fff;color:var(--ink);font-size:1.45rem;line-height:1;cursor:pointer}
.ask-feed{flex:1;overflow-y:auto;padding:20px 18px 10px;display:grid;align-content:start;gap:16px}
.ask-line{margin:0;padding-left:12px;border-left:3px solid var(--line);color:var(--text);font-size:.97rem}
.ask-line b{display:block;margin-bottom:2px;font:600 .76rem/1.4 var(--mono);letter-spacing:.04em;color:var(--muted)}
.ask-me{border-left-color:var(--cobalt);color:var(--ink)}
.ask-me b{color:var(--cobalt)}
.ask-examples{display:grid;gap:2px}
.ask-examples p{margin:0 0 4px;font:500 .76rem/1.4 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.ask-examples button{padding:.5rem 0;border:0;border-bottom:1px dashed var(--field);background:none;color:var(--ink);font:400 .95rem/1.35 var(--sans);text-align:left;cursor:pointer}
.ask-examples button::before{content:"→ ";font-family:var(--mono);color:var(--cobalt)}
.ask-examples button:hover{color:var(--cobalt)}
.ask-form{display:grid;gap:8px;padding:14px 16px 16px;background:var(--tile);border-top:1.5px solid var(--ink)}
.ask-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.ask-form input{min-height:44px;font-size:.95rem}
.ask-form textarea{min-height:84px;font-size:.95rem}
.ask-send{justify-self:end;min-height:44px}
@media(max-width:560px){.ask-row{grid-template-columns:1fr}}
/* en pantallas estrechas la pestaña vertical tapaba precios: pasa al borde inferior */
@media(max-width:760px){
  .ask-tab{top:auto;bottom:0;right:14px;transform:none;writing-mode:horizontal-tb;padding:.7rem 1rem;border:1.5px solid var(--ink);border-bottom:0;border-radius:12px 12px 0 0}
  .ask-tab:hover{padding-left:1rem}
  .ask-tab span::after{margin:0 0 0 .5rem}
  .foot{padding-bottom:56px}
}

/* ---------- movimiento reducido e impresión ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .rv{opacity:1;transform:none;transition:none}
  .js .curve path{stroke-dashoffset:0}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
@media print{
  .no-print,.top,.foot,.ask-tab,.ask{display:none!important}
  body{background:#fff}
  .js .rv{opacity:1;transform:none}
}