/* =============================================================
   TuQR · 1. Tokens
   ============================================================= */
:root{
  --ink:#14161c;
  --ink-2:#565d70;
  --ink-3:#828a9c;
  --line:#e4e6ec;
  --line-2:#eef0f4;
  --bg:#f4f5f8;
  --card:#ffffff;
  --accent:#e2571f;
  --accent-dark:#c2430f;
  --accent-soft:#fdf0e9;
  --ok:#0f7b52;
  --warn:#9a6100;
  --warn-bg:#fff7e6;
  --bad:#b3261e;
  --bad-bg:#fdecea;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 1px 2px rgba(20,22,28,.05), 0 12px 32px -18px rgba(20,22,28,.28);
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --display:"Space Grotesk","Inter",-apple-system,sans-serif;
  --ease-out:cubic-bezier(.16,1,.3,1);
  --gutter:clamp(1rem,4vw,2rem);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*,*::before,*::after{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;tab-size:2}
body{
  font-family:var(--sans);font-size:16px;line-height:1.6;color:var(--ink);
  background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:clip;
}
img,svg,canvas{display:block;max-width:100%}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
a{color:inherit;text-decoration:none}
p{text-wrap:pretty}
h1,h2,h3{font-family:var(--display);text-wrap:balance;line-height:1.12;letter-spacing:-.02em;font-weight:700}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* =============================================================
   3. Utilities
   ============================================================= */
.wrap{width:min(1140px,100% - var(--gutter)*2);margin-inline:auto}
.skip-link{position:fixed;top:-100px;left:1rem;padding:.6rem 1rem;background:var(--ink);color:#fff;z-index:9999;border-radius:8px;font-weight:600}
.skip-link:focus{top:1rem}
.section{padding-block:clamp(2.5rem,6vw,4.5rem)}
.section>h2{font-size:clamp(1.5rem,3.6vw,2.15rem);margin-bottom:.5rem}
.section-sub{color:var(--ink-2);max-width:62ch;margin-bottom:1.75rem}

/* =============================================================
   4. Header
   ============================================================= */
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:60px}
.brand{display:flex;align-items:center;gap:.55rem;font-family:var(--display);font-weight:700;font-size:1.12rem;letter-spacing:-.03em}
.brand-mark{width:22px;height:22px;fill:var(--accent)}
.header-nav{display:none;gap:1.5rem;font-size:.9rem;color:var(--ink-2)}
.header-nav a:hover{color:var(--accent)}
@media(min-width:720px){.header-nav{display:flex}}

/* =============================================================
   5. Hero
   ============================================================= */
.hero{padding-block:clamp(1rem,4vw,2.6rem) 1rem;text-align:center}
.hero h1{font-size:clamp(1.65rem,4.6vw,2.7rem)}
.hero-sub{margin:.7rem auto 0;max-width:64ch;color:var(--ink-2);font-size:clamp(.92rem,1.6vw,1.06rem)}

/* =============================================================
   6. Tool card
   ============================================================= */
.noscript-msg{background:var(--warn-bg);border:1px solid #f0d9a8;color:var(--warn);padding:.9rem 1rem;border-radius:var(--radius);margin-bottom:1rem}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.step{padding:clamp(1.1rem,3vw,1.75rem)}
.step+.step{border-top:1px solid var(--line-2)}
.step-title{display:flex;align-items:center;gap:.6rem;font-size:1.14rem;margin-bottom:.85rem}
.step-num{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--accent);color:#fff;font-size:.85rem;font-weight:700;flex:none}
.step-body{display:grid;gap:1.5rem}
.step-body>[data-col="preview"]{order:1}
.step-body>[data-col="controls"]{order:2}

.lbl{display:block;font-size:.82rem;font-weight:600;letter-spacing:.01em;margin-bottom:.4rem;color:var(--ink)}
.lbl small{font-weight:400;color:var(--ink-3)}
.hint{font-size:.79rem;color:var(--ink-3);margin-top:.4rem;line-height:1.45}
.ctrl+.ctrl{margin-top:1.15rem}

.inp{
  width:100%;padding:.62rem .8rem;border:1px solid var(--line);border-radius:10px;
  background:#fbfbfc;font:inherit;font-size:.94rem;color:var(--ink);transition:border-color .18s var(--ease-out),background .18s
}
.inp:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px var(--accent-soft)}
.inp--big{font-size:1.02rem;padding:.78rem .9rem}
textarea.inp{resize:vertical;line-height:1.5}
select.inp{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%23565d70' stroke-width='1.6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .7rem center;background-size:11px;padding-right:2rem}
.row-2{display:grid;gap:.75rem}
.row-2+.row-2{margin-top:.75rem}
@media(min-width:540px){.row-2{grid-template-columns:1fr 1fr}}
.check-wrap{display:flex;align-items:flex-end}
.check{display:flex;align-items:center;gap:.45rem;font-size:.9rem;color:var(--ink-2);padding-bottom:.55rem}
.check input{width:16px;height:16px;accent-color:var(--accent)}

.field-block{margin-bottom:1.1rem}
.tabs{display:flex;gap:.35rem;margin-bottom:.85rem;background:var(--line-2);padding:.25rem;border-radius:11px;width:fit-content;max-width:100%;overflow:auto}
.tab{padding:.42rem .95rem;border-radius:8px;font-size:.88rem;font-weight:500;color:var(--ink-2);white-space:nowrap;transition:background .18s var(--ease-out),color .18s}
.tab.is-active{background:var(--card);color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(20,22,28,.08)}
.pane[hidden]{display:none}

.chips{display:flex;flex-wrap:wrap;gap:.4rem}
.chip{padding:.44rem .85rem;border:1px solid var(--line);border-radius:999px;font-size:.85rem;color:var(--ink-2);background:#fbfbfc;transition:all .18s var(--ease-out)}
.chip:hover{border-color:var(--ink-3)}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:#fff;font-weight:500}

.colors{display:flex;flex-wrap:wrap;align-items:center;gap:.7rem}
.color{display:flex;align-items:center;gap:.5rem;font-size:.85rem;color:var(--ink-2)}
.color input[type=color]{width:38px;height:34px;padding:0;border:1px solid var(--line);border-radius:9px;background:none;cursor:pointer}
.color input[type=color]::-webkit-color-swatch-wrapper{padding:3px}
.color input[type=color]::-webkit-color-swatch{border:none;border-radius:6px}
.btn-mini{padding:.4rem .7rem;border:1px solid var(--line);border-radius:8px;font-size:.8rem;color:var(--ink-2);background:#fbfbfc;transition:all .18s var(--ease-out)}
.btn-mini:hover{border-color:var(--ink-3);color:var(--ink)}
.swatches{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.6rem}
.swatch{width:34px;height:22px;border-radius:6px;border:1px solid var(--line);overflow:hidden;display:flex;padding:0}
.swatch i{display:block;flex:1;height:100%}
.swatch:hover{transform:translateY(-1px);border-color:var(--ink-3)}

.emoji-row{display:flex;flex-wrap:wrap;gap:.3rem}
.emo{width:36px;height:36px;border:1px solid var(--line);border-radius:9px;font-size:1.1rem;line-height:1;display:grid;place-items:center;background:#fbfbfc;transition:all .16s var(--ease-out)}
.emo:hover{border-color:var(--ink-3);transform:translateY(-1px)}
.emo.is-active{border-color:var(--accent);background:var(--accent-soft);box-shadow:0 0 0 2px var(--accent-soft)}
.center-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;margin-top:.55rem}
.btn-file{cursor:pointer}
.center-state{font-size:.79rem;color:var(--ink-3)}

.formats{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem}
.fmt{border:1px solid var(--line);border-radius:12px;padding:.7rem .5rem;text-align:center;background:#fbfbfc;transition:all .18s var(--ease-out);display:flex;flex-direction:column;align-items:center;gap:.15rem}
.fmt svg{width:34px;height:28px;fill:none;stroke:var(--ink-2);stroke-width:1.7;stroke-linejoin:round;margin-bottom:.15rem}
.fmt strong{font-size:.82rem;font-weight:600;line-height:1.2}
.fmt small{font-size:.7rem;color:var(--ink-3);line-height:1.2}
.fmt:hover{border-color:var(--ink-3)}
.fmt.is-active{border-color:var(--accent);background:var(--accent-soft)}
.fmt.is-active svg{stroke:var(--accent)}

input[type=range]{width:100%;accent-color:var(--accent);margin-top:.15rem}
output{float:right;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums}

.warns{margin-top:1.15rem;display:grid;gap:.45rem}
.warn-item{font-size:.82rem;line-height:1.45;padding:.55rem .7rem;border-radius:10px;border:1px solid transparent;display:flex;gap:.45rem}
.warn-item b{font-weight:600}
.warn-item--ok{background:#eef8f3;border-color:#cfe8dd;color:var(--ok)}
.warn-item--warn{background:var(--warn-bg);border-color:#f2ddb0;color:var(--warn)}
.warn-item--bad{background:var(--bad-bg);border-color:#f4c9c5;color:var(--bad)}

/* previews */
.preview{display:flex;flex-direction:column;gap:.7rem}
.preview-box{background:var(--line-2);border:1px solid var(--line);border-radius:var(--radius);padding:.9rem;display:grid;place-items:center}
.qr-preview{width:100%;max-width:280px;aspect-ratio:1;display:grid;place-items:center}
.qr-preview canvas,.qr-preview svg{width:100%!important;height:auto!important;border-radius:6px}
.preview-box--3d{padding:0;overflow:hidden;position:relative;display:block}
.viewer{position:relative;width:100%;aspect-ratio:4/3;min-height:230px;background:linear-gradient(180deg,#fbfbfc,#e9ebf0);display:grid;place-items:center}
.viewer canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:none;cursor:grab}
.viewer canvas:active{cursor:grabbing}
.viewer-msg{position:relative;font-size:.85rem;color:var(--ink-3);text-align:center;padding:1rem;max-width:32ch}
.viewer-hint{font-size:.74rem;color:var(--ink-3);text-align:center;padding:.45rem;border-top:1px solid var(--line);background:var(--card)}
.preview-meta{font-size:.79rem;color:var(--ink-3);text-align:center;min-height:1.1em;font-variant-numeric:tabular-nums}

.dl-row{display:flex;gap:.5rem;flex-wrap:wrap}
.dl-row .btn{flex:1 1 140px}
.btn{padding:.72rem 1rem;border-radius:11px;font-size:.92rem;font-weight:600;text-align:center;transition:all .18s var(--ease-out);border:1px solid transparent}
.btn-main{background:var(--accent);color:#fff;font-size:.98rem;padding:.9rem 1.1rem;box-shadow:0 8px 20px -10px rgba(226,87,31,.85)}
.btn-main:hover{background:var(--accent-dark)}
.btn-sec{background:var(--card);border-color:var(--line);color:var(--ink)}
.btn-sec:hover{border-color:var(--ink-3)}
.btn-ghost{background:none;color:var(--ink-2);font-weight:500;font-size:.85rem;padding:.5rem}
.btn-ghost:hover{color:var(--accent)}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn.is-busy{opacity:.75;cursor:progress}

.privacy-badge{background:var(--line-2);border-top:1px solid var(--line);padding:.85rem clamp(1.1rem,3vw,1.75rem);font-size:.83rem;color:var(--ink-2);line-height:1.5}

/* =============================================================
   7. Ad slots (placeholders — sin código de terceros)
   ============================================================= */
.ad-slot{
  display:grid;place-content:center;gap:.2rem;text-align:center;
  border:1px dashed #c8ccd6;border-radius:12px;background:
    repeating-linear-gradient(135deg,#fafafb,#fafafb 10px,#f3f4f7 10px,#f3f4f7 20px);
  color:var(--ink-3);
}
.ad-tag{font-size:.7rem;font-weight:700;letter-spacing:.16em}
.ad-size{font-size:.68rem;opacity:.75}
.ad-slot--leaderboard{min-height:96px;margin-block:.5rem 1.5rem}
.ad-slot--incontent{min-height:280px;max-width:340px;margin:0 auto}
.ad-slot--modal{min-height:250px;width:100%}
.ad-slot--toast{min-height:96px;width:100%}

.ad-modal{
  border:0;border-radius:var(--radius-lg);padding:1.25rem;max-width:min(360px,92vw);
  box-shadow:0 24px 60px -20px rgba(20,22,28,.4);position:relative;background:var(--card);color:var(--ink)
}
.ad-modal::backdrop{background:rgba(20,22,28,.45)}
.ad-modal-close{position:absolute;top:.4rem;right:.55rem;font-size:1.5rem;line-height:1;color:var(--ink-3);width:32px;height:32px;border-radius:8px}
.ad-modal-close:hover{background:var(--line-2);color:var(--ink)}
.ad-modal-title{font-weight:600;font-size:.95rem;margin-bottom:.75rem;padding-right:2rem}
.ad-modal .btn{width:100%;margin-top:.75rem}

.ad-toast{
  position:fixed;right:1rem;bottom:1rem;z-index:60;width:min(300px,calc(100vw - 2rem));
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 16px 40px -18px rgba(20,22,28,.45);padding:.6rem;
  animation:toast-in .45s var(--ease-out) both
}
@keyframes toast-in{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.ad-toast[hidden]{display:none}
.ad-toast-close{position:absolute;top:-9px;right:-9px;width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;font-size:1rem;line-height:1;display:grid;place-items:center}

/* =============================================================
   8. Content sections
   ============================================================= */
.steps-3{list-style:none;padding:0;display:grid;gap:1rem;margin-top:1.5rem}
.steps-3 li{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.25rem}
.steps-3 svg{width:26px;height:26px;fill:none;stroke:var(--accent);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;margin-bottom:.6rem}
.steps-3 h3{font-size:1.02rem;margin-bottom:.35rem}
.steps-3 p{font-size:.9rem;color:var(--ink-2)}
@media(min-width:720px){.steps-3{grid-template-columns:repeat(3,1fr)}}

.ideas-grid{display:grid;gap:.85rem;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.idea{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem}
.idea-emo{font-size:1.4rem;display:block;margin-bottom:.45rem}
.idea h3{font-size:.98rem;margin-bottom:.3rem}
.idea p{font-size:.86rem;color:var(--ink-2)}

.article{max-width:none}
.article h3{font-size:1.1rem;margin:1.8rem 0 .5rem}
.article p,.article li{color:var(--ink-2);max-width:72ch}
.article p+p{margin-top:.7rem}
.rules{margin:.6rem 0 0 1.1rem;display:grid;gap:.45rem}
.rules strong,.article strong{color:var(--ink)}

.faq{display:grid;gap:.5rem;margin-top:1.25rem;max-width:80ch}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:.9rem 1.1rem}
.faq summary{font-weight:600;cursor:pointer;font-size:.95rem;list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:flex-start}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:1.2rem;line-height:1;flex:none}
.faq details[open] summary::after{content:"−"}
.faq p{margin-top:.6rem;font-size:.9rem;color:var(--ink-2)}

/* =============================================================
   9. Footer + legal pages
   ============================================================= */
.site-footer{background:var(--card);border-top:1px solid var(--line);margin-top:2rem;padding-block:1.75rem}
.footer-inner{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:flex-start}
.foot-brand{font-family:var(--display);font-weight:700}
.foot-note{font-size:.82rem;color:var(--ink-3);max-width:46ch}
.foot-links{display:flex;gap:1.1rem;font-size:.85rem;color:var(--ink-2);flex-wrap:wrap}
.foot-links a:hover{color:var(--accent)}
.legal{padding-block:2rem 3rem;max-width:74ch}
.legal h1{font-size:1.7rem;margin-bottom:1rem}
.legal h2{font-size:1.1rem;margin:1.6rem 0 .4rem}
.legal p,.legal li{color:var(--ink-2);font-size:.94rem}
.legal p+p{margin-top:.6rem}
.legal ul{margin-left:1.1rem}
.legal .todo{background:var(--warn-bg);border:1px solid #f2ddb0;color:var(--warn);padding:.7rem .85rem;border-radius:10px;font-size:.86rem}

/* =============================================================
   10. Responsive — dos columnas en la herramienta
   ============================================================= */
@media(min-width:960px){
  .step-body{grid-template-columns:minmax(0,1fr) 340px;align-items:start;gap:2rem}
  .step-body>[data-col="controls"]{order:1}
  .step-body>[data-col="preview"]{order:2}
  .qr-preview{max-width:300px}
}

/* =============================================================
   11. Reduced motion — solo efectos intrusivos
   ============================================================= */
@media (prefers-reduced-motion: reduce){
  .ad-toast{animation:none}
  html{scroll-behavior:auto}
}

/* =============================================================
   12. Más formatos (enlazado interno entre páginas)
   ============================================================= */
.more-tools{padding-block:clamp(2rem,5vw,3rem)}
.more-tools h2{font-size:clamp(1.35rem,3vw,1.8rem);margin-bottom:.4rem}
.more-grid{display:grid;gap:.7rem;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));margin-top:1.25rem}
.more-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem;display:flex;gap:.75rem;align-items:flex-start;transition:all .18s var(--ease-out)}
.more-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow)}
.more-card[aria-current="page"]{background:var(--accent-soft);border-color:var(--accent)}
.more-emo{font-size:1.3rem;line-height:1.2;flex:none}
.more-card strong{display:block;font-size:.94rem;font-weight:600;margin-bottom:.15rem}
.more-card span{font-size:.82rem;color:var(--ink-2);line-height:1.4}
.page-intro{color:var(--ink-2);max-width:66ch;margin:.85rem auto 0;font-size:clamp(.92rem,1.6vw,1.04rem)}
.crumbs{font-size:.8rem;color:var(--ink-3);padding-top:.9rem}
.crumbs a:hover{color:var(--accent)}
.crumbs span{opacity:.6;padding:0 .3rem}

.legal-date{font-size:.82rem;color:var(--ink-3);margin-bottom:1.25rem}
.legal ul{margin:.5rem 0 0 1.1rem;display:grid;gap:.35rem}
.legal a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}