/* WeldSketch · sitio público. Sin framework ni JavaScript de interfaz: carga rápida y legible para buscadores. */
:root{--navy:#102a38;--deep:#0b202c;--teal:#007f78;--teal-d:#00665f;--teal-l:#e4f3ef;--gold:#d59d43;--gold-l:#eab45f;--ink:#233e4c;--muted:#5a7080;--line:#dde5e9;--bg:#f5f7f9;--white:#fff;--r:14px;--max:1120px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--white)}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--teal-d)}
a:hover{color:var(--navy)}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:var(--navy);color:#fff;padding:10px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
h1,h2,h3{color:var(--navy);line-height:1.18;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2rem,4.6vw,3.2rem);font-weight:800}
.hero h1{max-width:20ch;margin-left:auto;margin-right:auto}
h2{font-size:clamp(1.6rem,3.2vw,2.2rem);font-weight:800}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 1em}
.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-d);margin-bottom:.8em}
.lead{font-size:1.22rem;color:#3b5565;max-width:62ch}

/* Cabecera */
.site-head{position:sticky;top:0;z-index:50;background:rgba(16,42,56,.97);backdrop-filter:blur(6px)}
.site-head .wrap{display:flex;align-items:center;gap:20px;min-height:66px}
.brand img{height:44px;width:auto}
.site-nav{display:flex;gap:6px;margin-left:auto;align-items:center}
.site-nav a{color:#d3e2e8;text-decoration:none;font-size:.95rem;font-weight:600;padding:8px 12px;border-radius:8px}
.site-nav a:hover{background:#ffffff14;color:#fff}
.site-nav a.btn-gold{color:var(--deep);padding:9px 16px;margin-left:6px}
.site-nav a.btn-gold:hover{background:#f3c479;color:var(--deep)}
.site-nav .lang{border:1px solid #ffffff44;font-size:.82rem;padding:5px 10px}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid #ffffff55;color:#fff;border-radius:8px;padding:8px 12px;font:inherit;font-weight:700;cursor:pointer}
.btn{display:inline-block;font-weight:700;text-decoration:none;border-radius:10px;padding:13px 22px;font-size:1rem;border:2px solid transparent;cursor:pointer;transition:background .15s,border-color .15s}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-d);color:#fff}
.btn-gold{background:var(--gold-l);color:var(--deep)}
.btn-gold:hover{background:#f3c479;color:var(--deep)}
.btn-ghost{border-color:#9bb3bd;color:var(--navy);background:transparent}
.btn-ghost:hover{border-color:var(--navy);background:#fff;color:var(--navy)}
.site-head .btn{padding:9px 16px;font-size:.92rem}

/* Hero */
.hero{background:linear-gradient(160deg,#fff 0%,#eef6f5 60%,#e4f3ef 100%);padding:64px 0 40px;border-bottom:1px solid var(--line)}
.hero-logo{margin:0 0 20px}.hero-logo img{display:inline-block;width:330px;max-width:80%;height:auto}
.hero .grid{display:block;text-align:center}
.hero .grid .lead{margin-left:auto;margin-right:auto}
.hero .grid .shot{margin:44px auto 0;max-width:1040px;text-align:left}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 14px;justify-content:center}
.fine{font-size:.9rem;color:var(--muted)}
.shot{border-radius:var(--r);border:1px solid var(--line);box-shadow:0 24px 60px -24px rgba(16,42,56,.35);background:#fff;overflow:hidden}
.shot img{width:100%}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:44px}
.fact{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.fact b{display:block;font-size:1.9rem;font-weight:800;color:var(--navy);line-height:1.1}
.fact span{color:var(--muted);font-size:.93rem}

/* Secciones */
section{padding:72px 0}
.alt{background:var(--bg)}
.dark{background:var(--navy);color:#cfe0e6}
.dark h2,.dark h3{color:#fff}
.dark .eyebrow{color:var(--gold-l)}
.dark a{color:var(--gold-l)}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px}
.cards.four{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px}
.card p{color:#46606f;margin:0}
.dark .card{background:#ffffff0d;border-color:#ffffff22}
.dark .card p{color:#c2d6dd}
.icon{width:44px;height:44px;border-radius:12px;background:var(--teal-l);color:var(--teal-d);display:grid;place-items:center;margin-bottom:14px}
.dark .icon{background:#ffffff1a;color:var(--gold-l)}
.icon svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:34px;padding:0;list-style:none}
.steps li{counter-increment:s;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 24px 24px;position:relative}
.steps li::before{content:counter(s);position:absolute;top:-18px;left:22px;width:38px;height:38px;border-radius:50%;background:var(--navy);color:var(--gold-l);font-weight:800;display:grid;place-items:center}
.steps h3{margin-top:10px}
.showcase{display:grid;grid-template-columns:1.25fr 1fr;gap:24px;margin-top:34px;align-items:start}
.show-col{display:flex;flex-direction:column;gap:24px}
.showcase .f2 .shot{box-shadow:0 18px 44px #10293822}
.showcase figure{margin:0}
.showcase figcaption{font-size:.95rem;color:var(--muted);padding:10px 4px 0}
.plans{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:860px;margin:34px auto 0;text-align:left}
.plan{background:#fff;border:2px solid var(--line);border-radius:var(--r);padding:30px}
.plan.pro{border-color:var(--teal)}
.plan ul{padding-left:1.1em;margin:14px 0 22px}
.plan li{margin:.4em 0}
.tag{display:inline-block;background:var(--teal-l);color:var(--teal-d);font-size:.76rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;border-radius:20px;padding:3px 10px;margin-bottom:10px}
.note{background:#fff8ea;border:1px solid #f0dcb4;border-radius:var(--r);padding:20px 24px;margin-top:34px;color:#5c4a1c}
.note b{color:#3f3010}

/* FAQ */
.faq{max-width:820px;margin:34px auto 0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:0 20px}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy);padding:18px 0;list-style:none;display:flex;justify-content:space-between;gap:14px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;line-height:1;color:var(--teal-d)}
.faq details[open] summary::after{content:"–"}
.faq details p{color:#46606f;padding-bottom:6px}

/* CTA final y pie */
.cta{background:linear-gradient(135deg,var(--navy),#1d4252);color:#fff;text-align:center}
.cta h2{color:#fff}
.cta a:not(.btn){color:var(--gold-l)}
.cta p{color:#c8dbe2;max-width:56ch;margin:0 auto 26px}
.site-foot{background:var(--deep);color:#9fb5be;padding:44px 0 34px;font-size:.93rem}
.site-foot .cols{display:flex;gap:40px;flex-wrap:wrap;justify-content:space-between}
.site-foot a{color:#cfe0e6}
.site-foot ul{list-style:none;padding:0;margin:0}
.site-foot li{margin:.3em 0}
.site-foot img{height:36px;width:auto;margin-bottom:10px}
.copy{border-top:1px solid #ffffff1c;margin-top:28px;padding-top:18px;font-size:.85rem}

/* Guías */
.crumbs{font-size:.9rem;color:var(--muted);padding:22px 0 0}
.crumbs a{color:var(--muted)}
article.guide{max-width:780px;margin:0 auto;padding:30px 22px 60px}
article.guide h1{font-size:clamp(1.9rem,4vw,2.6rem)}
article.guide h2{font-size:1.5rem;margin-top:2em}
article.guide h3{margin-top:1.6em}
article.guide .meta{color:var(--muted);font-size:.92rem;margin-bottom:1.6em}
article.guide ul,article.guide ol{padding-left:1.3em}
article.guide li{margin:.35em 0}
article.guide figure{margin:1.8em 0}
article.guide figcaption{font-size:.92rem;color:var(--muted);margin-top:8px}
.callout{background:var(--teal-l);border-left:4px solid var(--teal);border-radius:0 12px 12px 0;padding:16px 20px;margin:1.6em 0}
.callout p{margin:0}
.toc{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:16px 22px;margin:1.6em 0}
.toc b{display:block;margin-bottom:6px}
.toc ol{margin:0;padding-left:1.2em}
table.t{width:100%;border-collapse:collapse;font-size:.96rem;margin:1.4em 0}
table.t th,table.t td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
table.t th{background:var(--bg);color:var(--navy)}
.diagram{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.diagram svg{width:100%;max-width:640px;margin:0 auto}
.diagram-row{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.diagram-row.six{grid-template-columns:repeat(6,1fr)}
.diagram-row figure{margin:0;text-align:center}
.diagram-row figcaption{margin-top:4px}
.guide-cta{background:var(--navy);color:#cfe0e6;border-radius:var(--r);padding:28px;margin-top:2.4em}
.guide-cta h2,.guide-cta h3{color:#fff;margin-top:0}
.guide-cta p{color:#c2d6dd}
.guide-list{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:30px}
.guide-card{display:block;text-decoration:none;color:inherit;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.guide-card:hover{border-color:var(--teal);box-shadow:0 10px 30px -18px rgba(16,42,56,.5)}
.guide-card h2{font-size:1.25rem;margin:0 0 .4em}
.guide-card p{color:#46606f;margin:0}
.related{margin-top:2.6em}

@media (max-width:980px){
  .hero .grid{grid-template-columns:1fr}
  .cards,.cards.four,.steps{grid-template-columns:1fr 1fr}
  .facts{grid-template-columns:1fr 1fr}
  .diagram-row,.diagram-row.six{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:720px){
  body{font-size:16px}
  section{padding:52px 0}
  .menu-btn{display:block}
  .site-nav{display:none;position:absolute;left:0;right:0;top:66px;background:var(--navy);flex-direction:column;align-items:stretch;padding:12px 22px 20px;margin:0;border-top:1px solid #ffffff22}
  .site-nav.open{display:flex}
  .site-nav a{padding:12px 8px}
  .cards,.cards.four,.steps,.showcase,.plans,.guide-list{grid-template-columns:1fr}
  .hero{padding-top:40px}
  .diagram-row,.diagram-row.six{grid-template-columns:repeat(2,1fr)}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.site-head,.site-foot,.cta,.guide-cta{display:none}}

/* precios por créditos */
.pricing{display:grid;grid-template-columns:1.15fr 1fr 1fr 1fr;gap:18px;margin:38px auto 0;text-align:left;align-items:stretch}
.pricing .plan{padding:26px;display:flex;flex-direction:column}.pricing .plan ul{flex:1;font-size:.95rem}.pricing .plan .btn{align-self:flex-start}
.pack{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 24px 24px;display:flex;flex-direction:column;box-shadow:0 10px 30px #1029380d;transition:transform .18s,box-shadow .18s}
.pack:hover{transform:translateY(-3px);box-shadow:0 18px 40px #10293818}
.pack.hot{border:2px solid var(--teal);box-shadow:0 18px 44px #007f7826}
.pack h3{font-size:1.25rem;color:var(--navy);margin:2px 0 8px}
.pack .tag{align-self:flex-start;margin-bottom:6px}
.pack .price small{font-size:.95rem;font-weight:600;color:var(--muted);letter-spacing:0}
.pack ul{padding-left:1.1em;margin:14px 0 20px;font-size:.92rem;flex:1}.pack li{margin:.35em 0}
.pack .price{font-size:2.15rem;font-weight:800;color:var(--navy);letter-spacing:-.03em;line-height:1}
.pack .ref{font-size:.82rem;color:var(--muted);margin:8px 0 0}
.pack .per{font-size:.92rem;color:var(--ink);font-weight:600;margin:16px 0 22px;padding-top:14px;border-top:1px dashed var(--line)}
.pack .btn{margin-top:auto}
.pack .btn{width:100%;justify-content:center;text-align:center}
.flag{position:absolute;top:-12px;left:20px;background:var(--teal);color:#fff;font-size:.72rem;font-weight:800;letter-spacing:.04em;padding:4px 11px;border-radius:999px}
.flag.alt{background:var(--gold-l);color:var(--deep)}
.includes{max-width:1120px;margin:22px auto 0;text-align:left;background:linear-gradient(135deg,#102a38,#17394a);color:#e3eef2;border-radius:var(--r);padding:20px 26px;display:flex;gap:26px;align-items:center;flex-wrap:wrap}
.includes h3{margin:0;font-size:1rem;color:#fff;white-space:nowrap}
.includes ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px 26px;flex:1}
.includes li{position:relative;padding-left:24px;font-size:.92rem}
.includes li::before{content:"";position:absolute;left:0;top:.2em;width:15px;height:15px;border-radius:50%;background:var(--gold-l) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='%230b202c' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/11px no-repeat}
@media(max-width:980px){.pricing{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.pricing{grid-template-columns:1fr}.pack.hot{order:-1}}

@media(max-width:640px){.hero-logo{display:none}}
.pricing .plan .tag{align-self:flex-start}

/* popup «Hablemos» */
.lead-dlg{border:0;padding:0;border-radius:20px;max-width:860px;width:calc(100% - 32px);box-shadow:0 30px 80px #0b202c59;overflow:hidden;display:none}
.lead-dlg[open]{display:grid;grid-template-columns:260px 1fr;animation:leadIn .22s ease-out}
.lead-dlg::backdrop{background:#0b202cb3;backdrop-filter:blur(3px)}
@keyframes leadIn{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.lead-dlg[open]{animation:none}}
.lead-x{position:absolute;top:10px;right:12px;width:36px;height:36px;border-radius:50%;border:0;background:#f1f5f7;color:var(--navy);font-size:22px;line-height:1;cursor:pointer;z-index:2}
.lead-x:hover{background:#e3ebef}
.lead-side{background:radial-gradient(120% 120% at 0 0,#1d4a5c,#0b202c 70%);color:#d6e6ec;padding:30px 24px;display:flex;flex-direction:column;gap:26px}
.lead-side img{width:176px;height:auto}
.lead-side ul{list-style:none;margin:0;padding:0;display:grid;gap:12px;font-size:.92rem}
.lead-side li{padding-left:24px;position:relative}.lead-side li::before{content:"";position:absolute;left:0;top:.25em;width:14px;height:14px;border-radius:50%;background:var(--gold-l)}
.lead-form,.lead-ok{padding:30px 30px 24px;position:relative}
.lead-form h2,.lead-ok h2{font-size:1.45rem;line-height:1.2;margin:0 34px 8px 0;color:var(--navy)}
.lead-lead{margin:0 0 18px;color:var(--muted);font-size:.95rem}
.lead-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 14px}
.lead-grid label{display:flex;flex-direction:column;gap:5px;font-size:.82rem;font-weight:600;color:var(--ink)}
.lead-grid .full{grid-column:1/-1}
.lead-grid input,.lead-grid select{font:inherit;font-weight:400;font-size:.95rem;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);min-height:44px}
.lead-grid input:focus,.lead-grid select:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px #007f7826}
.lead-hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.lead-consent{display:flex;gap:10px;align-items:flex-start;margin:16px 0 6px;font-size:.82rem;color:var(--muted);line-height:1.45}
.lead-consent input{width:18px;height:18px;margin-top:2px;accent-color:var(--teal);flex:none}
.lead-consent a{color:var(--teal);font-weight:600}
.lead-err{color:#b23a33;font-size:.85rem;min-height:1.2em;margin:4px 0 8px}
.lead-send{width:100%;justify-content:center;min-height:48px;font-size:1rem}
.lead-fine{text-align:center;font-size:.8rem;color:var(--muted);margin:10px 0 0}
.lead-ok{display:flex;flex-direction:column;justify-content:center;min-height:360px}
.lead-ok[hidden]{display:none}
.lead-check{width:54px;height:54px;border-radius:50%;background:#e4f3ef;color:var(--teal);font-size:28px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.lead-ok h2:focus{outline:none}
.lead-ok-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
@media(max-width:720px){.lead-dlg[open]{grid-template-columns:1fr;max-height:calc(100dvh - 24px);overflow:auto}.lead-side{display:none}.lead-form,.lead-ok{padding:24px 20px 20px}.lead-grid{grid-template-columns:1fr}}
.btn-ghost-light{background:transparent;color:#fff;border:2px solid #ffffff66}.btn-ghost-light:hover{border-color:#fff;background:#ffffff14}
.cta .hero-actions{justify-content:center}
.lead-dlg button,.lead-dlg select{font-family:inherit}

/* demo interactivo */
.demo-sec{background:linear-gradient(180deg,#fff,#f3f8f8)}
.demo{display:grid;grid-template-columns:340px 1fr;gap:28px;margin-top:30px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 18px 40px #1029380f;align-items:start}
.demo-controls{display:flex;flex-direction:column;gap:16px}
.demo-range{display:flex;flex-direction:column;gap:6px;font-size:.92rem;font-weight:600;color:var(--ink)}
.demo-range span{display:flex;justify-content:space-between}.demo-range output{color:var(--teal);font-variant-numeric:tabular-nums}
.demo-range input{width:100%;accent-color:var(--teal);height:28px}
.demo-views{display:inline-flex;background:#eef3f5;border-radius:999px;padding:4px;gap:4px;align-self:flex-start}
.demo-views button{border:0;background:transparent;border-radius:999px;padding:8px 14px;font:inherit;font-size:.86rem;font-weight:700;color:#3d5664;cursor:pointer}
.demo-views button[aria-pressed="true"]{background:#fff;color:var(--navy);box-shadow:0 2px 8px #10293814}
.demo-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:0}
.demo-stats div{background:#f5f8f9;border-radius:10px;padding:10px}.demo-stats dt{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.demo-stats dd{margin:4px 0 0;font-weight:800;color:var(--navy);font-variant-numeric:tabular-nums}
.demo-note{font-size:.8rem;color:var(--muted);margin:0}
.demo-canvas{background:#fbfdfd;border:1px solid #e3ebef;border-radius:14px;min-height:300px;display:flex;align-items:center;justify-content:center;padding:14px;background-image:linear-gradient(#eef3f5 1px,transparent 1px),linear-gradient(90deg,#eef3f5 1px,transparent 1px);background-size:20px 20px}
.demo-canvas svg{width:100%;max-height:360px;overflow:visible}
.d-plate{fill:#dfe8eb;stroke:#496777;stroke-width:.35;stroke-linejoin:round}
.d-bead{fill:#e6ae60;stroke:#8a5a12;stroke-width:.25}.d-cap{fill:none;stroke:#8a5a12;stroke-width:.3;stroke-dasharray:1 .8}
.d-num{text-anchor:middle;font-family:Arial,sans-serif;font-weight:700;fill:#3b2a10}
.d-dim{fill:none;stroke:#0b7a72;stroke-width:.3}.d-lbl{font-family:Arial,sans-serif;fill:#0b5f59;font-weight:700}.d-lbl.mid{text-anchor:middle}
.demo-cta{text-align:center;margin:24px 0 0}
@media(max-width:860px){.demo{grid-template-columns:1fr}.demo-canvas{order:-1;min-height:220px}}
.pack-more{display:block;text-align:center;margin-top:12px;font-size:.88rem;font-weight:700;color:var(--teal)}
.pack-more:hover{text-decoration:underline}
.guide-cta .hero-actions{justify-content:flex-start}