/* =============================================================
   QR3D — hoja de estilos única
   1 tokens · 2 reset · 3 utilidades · 4 tipografía · 5 componentes
   6 secciones · 7 anuncios · 8 responsive · 9 reduced-motion
   ============================================================= */

/* 1 ---------------------------------------------------------- */
:root{
  --ink:#14161b; --ink-2:#4b515e; --ink-3:#767d8b;
  --paper:#ffffff; --bg:#f5f6f8; --bg-2:#eceef2;
  --line:#e0e4ea; --line-2:#d0d6de;
  --accent:#f2560d; --accent-ink:#ffffff; --accent-soft:#fff1ea;
  --ok:#0d7a5f; --warn:#a35a00; --warn-bg:#fff6e6; --bad:#b3261e; --bad-bg:#fdecea;
  --radius:14px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(18,22,30,.05), 0 8px 28px -12px rgba(18,22,30,.16);
  --shadow-lg:0 2px 6px rgba(18,22,30,.06), 0 24px 60px -24px rgba(18,22,30,.28);
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  --disp:'Space Grotesk','Inter',-apple-system,'Segoe UI',Arial,sans-serif;
  --ease-out:cubic-bezier(.16,1,.3,1);
  --wrap:1180px;
}
:root:not([data-theme="light"]){}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ink:#eef1f5; --ink-2:#b3bac6; --ink-3:#8a93a1;
    --paper:#181b21; --bg:#101216; --bg-2:#1f232b;
    --line:#2a2f38; --line-2:#3a414c;
    --accent:#ff6a24; --accent-ink:#1a0d06; --accent-soft:#2a1a12;
    --ok:#4fd1a5; --warn:#f0b45e; --warn-bg:#2d2416; --bad:#ff8f85; --bad-bg:#2e1a18;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 28px -12px rgba(0,0,0,.6);
    --shadow-lg:0 2px 6px rgba(0,0,0,.45), 0 24px 60px -24px rgba(0,0,0,.8);
  }
}
[data-theme="dark"]{
  --ink:#eef1f5; --ink-2:#b3bac6; --ink-3:#8a93a1;
  --paper:#181b21; --bg:#101216; --bg-2:#1f232b;
  --line:#2a2f38; --line-2:#3a414c;
  --accent:#ff6a24; --accent-ink:#1a0d06; --accent-soft:#2a1a12;
  --ok:#4fd1a5; --warn:#f0b45e; --warn-bg:#2d2416; --bad:#ff8f85; --bad-bg:#2e1a18;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 28px -12px rgba(0,0,0,.6);
  --shadow-lg:0 2px 6px rgba(0,0,0,.45), 0 24px 60px -24px rgba(0,0,0,.8);
}

/* 2 ---------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--sans);font-size:16px;line-height:1.62;
  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(--disp);text-wrap:balance;line-height:1.12;letter-spacing:-.02em}
input,select{font:inherit;color:inherit}
::selection{background:var(--accent);color:var(--accent-ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

/* 3 ---------------------------------------------------------- */
.wrap{width:min(100% - 2rem, var(--wrap));margin-inline:auto}
.is-hidden{display:none !important}
.skip-link{position:fixed;top:-100px;left:1rem;z-index:99;padding:.6rem 1rem;
  background:var(--paper);border:1px solid var(--line);border-radius:8px;font-weight:600}
.skip-link:focus{top:1rem}
.opt{color:var(--ink-3);font-weight:400}

/* 4 ---------------------------------------------------------- */
.hero{padding:2.4rem 0 1.6rem;text-align:center}
h1{font-size:clamp(1.85rem,1.15rem + 2.6vw,3.05rem);letter-spacing:-.035em}
.hero-sub{max-width:63ch;margin:.9rem auto 0;color:var(--ink-2);font-size:clamp(1rem,.96rem + .25vw,1.1rem)}
h2{font-size:clamp(1.4rem,1.15rem + .9vw,2rem);margin-bottom:.5rem}
h3{font-size:1.06rem;letter-spacing:-.015em}
.section{padding:3rem 0}
.section-sub{color:var(--ink-2);margin-bottom:1.5rem;max-width:65ch}

/* 5 ---------------------------------------------------------- */
.site-header{border-bottom:1px solid var(--line);background:var(--paper)}
.header-inner{display:flex;align-items:center;gap:1rem;padding:.85rem 0;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.55rem;font-family:var(--disp);font-weight:700;font-size:1.22rem;letter-spacing:-.03em}
.brand-mark{color:var(--accent);display:grid;place-items:center}
.brand-claim{margin-left:auto;color:var(--ink-3);font-size:.86rem}

.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.tool{padding-bottom:.5rem}
.tool-grid{display:grid;gap:1rem;grid-template-columns:1fr}
.panel-controls{padding:1.25rem}
.panel-preview{padding:1.25rem;display:flex;flex-direction:column;gap:.7rem}

.field{margin-bottom:1.05rem}
.field:last-child{margin-bottom:0}
.grid-2{display:grid;gap:.9rem;grid-template-columns:1fr 1fr}
.lbl{display:block;font-size:.8rem;font-weight:600;letter-spacing:.015em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:.4rem}
.hint{font-size:.83rem;color:var(--ink-3);margin-top:.4rem}
.sep{border:0;border-top:1px solid var(--line);margin:1.1rem 0}

.inp{width:100%;padding:.7rem .8rem;border:1px solid var(--line-2);border-radius:var(--radius-sm);
  background:var(--bg);transition:border-color .18s var(--ease-out),box-shadow .18s var(--ease-out)}
.inp:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
select.inp{cursor:pointer}
.field .lbl + .inp{margin-bottom:.55rem}

.seg{display:flex;gap:.3rem;padding:.28rem;background:var(--bg-2);border-radius:var(--radius-sm)}
.seg-btn{flex:1;padding:.5rem .6rem;border-radius:8px;font-size:.9rem;font-weight:600;color:var(--ink-2);
  transition:background .18s var(--ease-out),color .18s var(--ease-out)}
.seg-btn.is-on{background:var(--paper);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.1)}

.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.55rem}
.chip{padding:.32rem .65rem;border:1px solid var(--line-2);border-radius:99px;font-size:.8rem;color:var(--ink-2);
  transition:border-color .18s var(--ease-out),color .18s var(--ease-out)}
.chip:hover{border-color:var(--accent);color:var(--accent)}

.styles{display:grid;grid-template-columns:repeat(4,1fr);gap:.45rem}
.style-btn{display:flex;flex-direction:column;align-items:center;gap:.35rem;padding:.55rem .2rem;
  border:1.5px solid var(--line);border-radius:var(--radius-sm);font-size:.76rem;font-weight:600;color:var(--ink-2);
  transition:border-color .18s var(--ease-out),background .18s var(--ease-out)}
.style-btn span{display:block;width:40px;height:40px;flex:0 0 auto}
.style-btn.is-on{border-color:var(--accent);background:var(--accent-soft);color:var(--ink)}

.color-row{display:flex;align-items:center;gap:.5rem}
input[type=color]{width:44px;height:38px;padding:2px;border:1px solid var(--line-2);
  border-radius:9px;background:var(--bg);cursor:pointer}
.color-row output{font-size:.8rem;font-variant-numeric:tabular-nums;color:var(--ink-3);letter-spacing:.02em}

.emoji-row{display:flex;flex-wrap:wrap;gap:.35rem}
.emo{width:42px;height:42px;font-size:1.25rem;line-height:1;border:1.5px solid var(--line);
  border-radius:var(--radius-sm);background:var(--bg);display:grid;place-items:center;
  transition:border-color .18s var(--ease-out),transform .18s var(--ease-out)}
.emo:hover{border-color:var(--accent)}
.emo.is-on{border-color:var(--accent);background:var(--accent-soft)}
.logo-row{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;margin-top:.55rem}
.text-row{display:flex;gap:.5rem;align-items:center}
.text-row .inp{flex:1}

.rng{width:100%;accent-color:var(--accent);margin-top:.15rem}
.lbl output{float:right;text-transform:none;letter-spacing:0;color:var(--ink);font-variant-numeric:tabular-nums}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;
  padding:.72rem 1.05rem;border-radius:var(--radius-sm);font-weight:600;font-size:.94rem;
  border:1.5px solid transparent;transition:transform .16s var(--ease-out),background .18s var(--ease-out),border-color .18s var(--ease-out)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(1.06)}
.btn-ghost{border-color:var(--line-2);color:var(--ink-2);background:var(--paper)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{padding:.45rem .75rem;font-size:.84rem}
.btn small{font-weight:400;opacity:.78;font-size:.78rem}
.btn-big{flex-direction:column;gap:.1rem;padding:.85rem 1.2rem;font-size:1.02rem;align-items:center}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.dl-row{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1.15rem}
.dl-row .btn{flex:1;min-width:150px}
.dl-row-3d{margin-top:.4rem}

.preview-2d{background:var(--bg-2);border-radius:var(--radius-sm);padding:1rem;display:grid;place-items:center}
.preview-2d canvas{width:100%;max-width:400px;height:auto;border-radius:8px;
  box-shadow:0 1px 3px rgba(0,0,0,.12)}
.preview-meta{font-size:.82rem;color:var(--ink-3);text-align:center;font-variant-numeric:tabular-nums}
.privacy{font-size:.85rem;color:var(--ink-2);background:var(--bg);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:.7rem .85rem;margin-top:auto}
.panel-preview .preview-2d{flex:1;align-content:center}

/* --- bloque 3D --- */
.panel-3d{margin-top:1rem;padding:1.35rem}
.panel-3d-head{margin-bottom:1.15rem;padding-bottom:1.05rem;border-bottom:1px solid var(--line)}
.h-3d{font-size:clamp(1.25rem,1.05rem + .8vw,1.7rem)}
.sub-3d{color:var(--ink-2);margin-top:.35rem;max-width:70ch;font-size:.96rem}
.d3-grid{display:grid;gap:1.3rem;grid-template-columns:1fr}
.formats{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem}
.fmt{display:flex;flex-direction:column;align-items:center;gap:.15rem;padding:.7rem .35rem;
  border:1.5px solid var(--line);border-radius:var(--radius-sm);color:var(--ink-2);text-align:center;
  transition:border-color .18s var(--ease-out),background .18s var(--ease-out)}
.fmt svg{width:38px;height:32px;margin-bottom:.15rem}
.fmt b{font-size:.86rem;font-weight:600;color:var(--ink)}
.fmt i{font-size:.74rem;font-style:normal;color:var(--ink-3)}
.fmt.is-on{border-color:var(--accent);background:var(--accent-soft)}

.viewer-box{position:relative;background:
  radial-gradient(120% 90% at 50% 0%, var(--bg-2) 0%, var(--bg) 70%);
  border:1px solid var(--line);border-radius:var(--radius-sm);aspect-ratio:4/3;overflow:hidden}
.viewer-box canvas{width:100%;height:100%;touch-action:none}
.viewer-msg{position:absolute;inset:0;display:grid;place-items:center;text-align:center;
  padding:1.5rem;color:var(--ink-3);font-size:.9rem;pointer-events:none}
.viewer-hint{font-size:.79rem;color:var(--ink-3);text-align:center;margin-top:.45rem}
.specs{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem;margin-top:.8rem}
.specs div{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-sm);padding:.55rem .6rem}
.specs dt{font-size:.71rem;text-transform:uppercase;letter-spacing:.03em;color:var(--ink-3);font-weight:600}
.specs dd{font-size:.92rem;font-weight:600;margin-top:.1rem;font-variant-numeric:tabular-nums}

.warnings{display:flex;flex-direction:column;gap:.45rem;margin:.9rem 0 .2rem}
.notice{font-size:.86rem;border-radius:var(--radius-sm);padding:.6rem .75rem;border:1px solid transparent;line-height:1.5}
.notice-ok{background:var(--bg);border-color:var(--line);color:var(--ink-2)}
.notice-warn{background:var(--warn-bg);border-color:color-mix(in srgb,var(--warn) 35%,transparent);color:var(--warn)}
.notice-bad{background:var(--bad-bg);border-color:color-mix(in srgb,var(--bad) 35%,transparent);color:var(--bad)}

/* 6 ---------------------------------------------------------- */
.steps{list-style:none;padding:0;display:grid;gap:1rem;grid-template-columns:1fr;counter-reset:s}
.steps li{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem;position:relative}
.step-n{display:grid;place-items:center;width:34px;height:34px;border-radius:99px;
  background:var(--accent);color:var(--accent-ink);font-family:var(--disp);font-weight:700;margin-bottom:.6rem}
.steps h3{margin-bottom:.3rem}
.steps p{color:var(--ink-2);font-size:.94rem}

.prose h3{margin:1.5rem 0 .35rem;font-size:1.12rem}
.prose p{color:var(--ink-2);max-width:74ch;margin-bottom:.7rem}

.cards{display:grid;gap:.85rem;grid-template-columns:1fr}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:1.05rem}
.card-ico{font-size:1.45rem;display:block;margin-bottom:.4rem}
.card h3{margin-bottom:.25rem}
.card p{color:var(--ink-2);font-size:.9rem}

.faq details{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-sm);
  margin-bottom:.55rem;overflow:hidden}
.faq summary{padding:.9rem 1rem;cursor:pointer;font-weight:600;list-style:none;position:relative;padding-right:2.4rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:1rem;top:50%;transform:translateY(-50%);
  font-size:1.3rem;color:var(--accent);font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{padding:0 1rem 1rem;color:var(--ink-2);font-size:.93rem;max-width:76ch}

.site-footer{border-top:1px solid var(--line);background:var(--paper);margin-top:2.5rem}
.footer-inner{padding:1.8rem 0;display:flex;flex-direction:column;gap:.6rem;font-size:.9rem;color:var(--ink-2)}
.footer-links{display:flex;gap:1rem;flex-wrap:wrap}
.footer-links a:hover{color:var(--accent)}
.mini{font-size:.78rem;color:var(--ink-3)}

/* 7 · huecos de publicidad (solo marcadores, sin scripts de terceros) ----------- */
.ad-slot{display:grid;place-content:center;gap:.15rem;text-align:center;
  border:1.5px dashed var(--line-2);border-radius:var(--radius-sm);background:var(--bg-2);
  color:var(--ink-3);letter-spacing:.16em;font-size:.76rem;font-weight:700}
.ad-slot small{letter-spacing:.02em;font-weight:400;font-size:.72rem;opacity:.8}
.ad-leaderboard{min-height:96px;margin:1.6rem 0 .4rem}
.ad-inline{min-height:250px;margin:.5rem 0}
.ad-modal{border:0;padding:0;background:transparent;max-width:min(92vw,360px);border-radius:var(--radius)}
.ad-modal::backdrop{background:rgba(10,12,16,.55);backdrop-filter:blur(2px)}
.ad-modal-inner{position:relative;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius);padding:1.5rem 1.1rem 1.1rem;box-shadow:var(--shadow-lg);
  display:flex;flex-direction:column;gap:.8rem;align-items:center}
.ad-modal-note{font-weight:600;font-size:.95rem;color:var(--ok)}
.ad-modal-slot{width:100%;min-height:250px}
.ad-close{position:absolute;top:.35rem;right:.5rem;width:32px;height:32px;border-radius:99px;
  font-size:1.4rem;line-height:1;color:var(--ink-3);display:grid;place-items:center}
.ad-close:hover{background:var(--bg-2);color:var(--ink)}
.ad-toast{position:fixed;right:1rem;bottom:1rem;z-index:40;width:min(300px,calc(100vw - 2rem));
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);padding:1.35rem .7rem .7rem}
.ad-toast-slot{min-height:100px}

/* 8 ---------------------------------------------------------- */
@media (min-width:720px){
  .tool-grid{grid-template-columns:1.05fr .95fr}
  .steps{grid-template-columns:repeat(3,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
  .footer-inner{flex-direction:row;align-items:center;flex-wrap:wrap}
  .footer-links{margin-left:auto}
  .mini{flex-basis:100%}
}
@media (min-width:960px){
  .d3-grid{grid-template-columns:1.02fr .98fr}
  .cards{grid-template-columns:repeat(4,1fr)}
  .hero{padding:3.2rem 0 2rem}
}
@media (min-width:1280px){
  .tool-grid{grid-template-columns:1fr .9fr}
}
@media (max-width:719px){
  .hero{padding:1.4rem 0 1rem}
  .hero-sub{font-size:.93rem;max-width:44ch}
  .styles{grid-template-columns:repeat(4,1fr)}
  .style-btn{font-size:.68rem;padding:.45rem .15rem}
  .style-btn span{width:32px;height:32px}
  .ad-leaderboard{min-height:120px}
  .brand-claim{display:none}
  .formats{grid-template-columns:1fr}
  .fmt{flex-direction:row;gap:.6rem;justify-content:flex-start;text-align:left;padding:.6rem .7rem}
  .fmt svg{flex:0 0 auto;margin-bottom:0}
  .fmt b{display:block}
  /* el aviso de la esquina no debe tapar los controles en el móvil */
  .ad-toast{left:.5rem;right:.5rem;width:auto;bottom:.5rem;padding:1.2rem .6rem .6rem}
  .ad-toast-slot{min-height:64px}
  .specs{grid-template-columns:1fr 1fr}
  .specs div:first-child{grid-column:1 / -1}
}

/* 9 ---------------------------------------------------------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .btn:active{transform:none}
}