/* =============================================================
   QRnovagen — hoja de estilos unica
   1. Tokens · 2. Reset · 3. Utilidades · 4. Tipografia
   5. Componentes · 6. Herramienta · 7. Secciones · 8. Anuncios
   9. Responsive · 10. Reduced motion
   ============================================================= */

/* 1. Tokens ------------------------------------------------- */
:root{
  --navy:#0f1b4c;
  --navy-2:#122a8f;
  --blue:#1b4de4;
  --cyan:#18c8f0;
  --ink:#0e1424;
  --ink-2:#4a5468;
  --ink-3:#7b8598;
  --line:#e2e7f0;
  --line-2:#eef1f7;
  --bg:#f6f8fc;
  --card:#ffffff;
  --ok:#0f8f5a;
  --warn:#b3690a;
  --bad:#c62f3d;
  --grad:linear-gradient(120deg,var(--navy-2) 0%,var(--blue) 45%,var(--cyan) 100%);
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --display:"Space Grotesk","Inter",system-ui,sans-serif;
  --r:14px;
  --r-sm:10px;
  --shadow:0 1px 2px rgba(15,27,76,.05),0 10px 30px -12px rgba(15,27,76,.18);
  --shadow-sm:0 1px 2px rgba(15,27,76,.06);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --gutter:clamp(16px,4vw,32px);
}

/* 2. Reset -------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;margin:0}
/* display:flex/inline-flex pisa el display:none del navegador para [hidden] */
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:76px}
body{
  font-family:var(--sans);font-size:16px;line-height:1.6;color:var(--ink);
  background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:clip;
}
img,svg,canvas{display:block;max-width:100%}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
input,select{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
p{text-wrap:pretty}
h1,h2,h3{text-wrap:balance;line-height:1.12;letter-spacing:-.02em;font-family:var(--display)}
::selection{background:var(--blue);color:#fff}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px}

/* 3. Utilidades --------------------------------------------- */
.wrap{width:min(1180px,100%);margin-inline:auto;padding-inline:var(--gutter)}
.skip-link{position:fixed;top:-100px;left:16px;z-index:99;background:#fff;color:var(--ink);
  padding:.6rem 1rem;border-radius:8px;box-shadow:var(--shadow)}
.skip-link:focus{top:16px}
.hint{font-size:.82rem;color:var(--ink-3);line-height:1.5;margin-top:.4rem}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* 4. Cabecera / tipografia ---------------------------------- */
.site-header{position:sticky;top:0;z-index:40;background:rgba(246,248,252,.88);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:34px;height:34px;flex:none}
.brand-word{font-family:var(--display);font-weight:700;font-size:1.22rem;letter-spacing:-.03em}
.brand-word b{color:var(--navy);font-weight:700}
.brand-word span{background:linear-gradient(90deg,var(--blue),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.site-nav{display:flex;gap:22px;font-size:.92rem;font-weight:500;color:var(--ink-2)}
.site-nav a{transition:color .2s var(--ease-out)}
.site-nav a:hover{color:var(--blue)}

.hero{padding-top:clamp(24px,5vw,44px)}
h1{font-size:clamp(1.75rem,4.4vw,2.75rem);letter-spacing:-.035em}
.hero-sub{margin-top:.75rem;max-width:64ch;color:var(--ink-2);font-size:clamp(.98rem,1.6vw,1.08rem)}

/* 5. Componentes -------------------------------------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  border-radius:var(--r-sm);font-weight:600;padding:.7rem 1.1rem;font-size:.95rem;
  transition:transform .18s var(--ease-out),box-shadow .18s var(--ease-out),background .18s var(--ease-out)}
.btn-sm{padding:.5rem .8rem;font-size:.85rem}
.btn-lg{padding:.95rem 1.4rem;font-size:1.02rem}
.btn-primary{background:var(--grad);color:#fff;flex-direction:column;gap:.15rem;
  box-shadow:0 8px 22px -10px rgba(27,77,228,.75)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(27,77,228,.85)}
.btn-primary .btn-sub{font-size:.74rem;font-weight:500;opacity:.85;letter-spacing:.01em}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn[disabled]{opacity:.5;pointer-events:none}

.fld{display:block;margin-bottom:14px}
.fld-label{display:block;font-size:.82rem;font-weight:600;color:var(--ink-2);margin-bottom:6px}
.fld-label em{font-style:normal;font-weight:400;color:var(--ink-3)}
.fld input[type=text],.fld select{
  width:100%;padding:.72rem .85rem;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;transition:border-color .18s var(--ease-out),box-shadow .18s var(--ease-out)}
.fld input[type=text]:focus,.fld select:focus{outline:none;border-color:var(--blue);
  box-shadow:0 0 0 3px rgba(27,77,228,.13)}
.fld input[type=range]{width:100%;accent-color:var(--blue)}
.fld-color input[type=color]{width:100%;height:44px;padding:3px;border:1px solid var(--line);
  border-radius:var(--r-sm);background:#fff;cursor:pointer}
.fld-inline{display:flex;align-items:center;gap:10px}
.fld-inline .fld-label{margin:0;flex:none}

/* 6. Herramienta -------------------------------------------- */
.tool{margin-top:clamp(18px,3vw,26px);background:var(--card);border:1px solid var(--line);
  border-radius:20px;box-shadow:var(--shadow);overflow:hidden}
.tool-content{padding:clamp(16px,3vw,24px);border-bottom:1px solid var(--line-2);
  background:linear-gradient(180deg,#fbfcff,#fff)}
.chips{display:flex;gap:8px;margin-bottom:14px}
.chip{padding:.44rem .95rem;border-radius:999px;border:1px solid var(--line);
  font-size:.86rem;font-weight:600;color:var(--ink-2);background:#fff;
  transition:all .18s var(--ease-out)}
.chip.is-on{background:var(--navy);border-color:var(--navy);color:#fff}
.quick{display:flex;flex-wrap:wrap;gap:6px;margin-top:-6px}
.quick button{font-size:.78rem;color:var(--ink-3);border:1px dashed var(--line);
  border-radius:999px;padding:.28rem .7rem;transition:all .18s var(--ease-out)}
.quick button:hover{color:var(--blue);border-color:var(--blue);border-style:solid}

.tool-body{display:grid;grid-template-columns:1fr;gap:0}
.tool-preview{padding:clamp(16px,3vw,24px);display:grid;gap:18px;
  background:linear-gradient(180deg,#f8fafe,#f2f6fd)}
.tool-controls{padding:clamp(16px,3vw,24px);border-top:1px solid var(--line-2)}

.pv{margin:0;display:flex;flex-direction:column;gap:10px}
.pv figcaption{font-size:.76rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3)}
.qr-holder{background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:14px;display:grid;place-items:center;min-height:220px}
#qr-canvas{width:100%;max-width:280px}
#qr-canvas canvas,#qr-canvas svg{width:100%!important;height:auto!important;border-radius:8px}
.pv-actions{display:flex;gap:8px;flex-wrap:wrap}
.pv-note{font-size:.78rem;color:var(--ink-3)}
.viewer{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  height:clamp(240px,42vw,300px);overflow:hidden}
.viewer canvas{width:100%;height:100%;display:block;touch-action:none}
.viewer-msg{position:absolute;inset:0;display:grid;place-items:center;text-align:center;
  padding:20px;font-size:.88rem;color:var(--ink-3);background:#fff}
.viewer-msg[hidden]{display:none}

.tabs{display:flex;gap:4px;background:var(--line-2);padding:4px;border-radius:12px;margin-bottom:18px}
.tab{flex:1;padding:.55rem .8rem;border-radius:9px;font-size:.88rem;font-weight:600;
  color:var(--ink-2);transition:all .18s var(--ease-out)}
.tab.is-on{background:#fff;color:var(--navy);box-shadow:var(--shadow-sm)}

.styles{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.style{display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px 4px;
  border:1px solid var(--line);border-radius:var(--r-sm);font-size:.74rem;font-weight:600;
  color:var(--ink-2);background:#fff;transition:all .18s var(--ease-out)}
.style span{width:30px;height:30px;background:var(--ink);display:block}
.style[data-style=clasico] span{border-radius:0}
.style[data-style=redondeado] span{border-radius:8px}
.style[data-style=puntos] span{border-radius:50%}
.style[data-style=elegante] span{border-radius:14px 4px 14px 4px}
.style.is-on{border-color:var(--blue);background:#f2f6ff;color:var(--blue);box-shadow:0 0 0 3px rgba(27,77,228,.1)}

.emojis{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.emojis button{width:38px;height:38px;font-size:1.15rem;line-height:1;border:1px solid var(--line);
  border-radius:var(--r-sm);background:#fff;display:grid;place-items:center;
  transition:all .18s var(--ease-out)}
.emojis button:hover{border-color:var(--blue)}
.emojis button.is-on{border-color:var(--blue);background:#f2f6ff;box-shadow:0 0 0 3px rgba(27,77,228,.1)}
.center-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}

.formats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.fmt{display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px 6px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;color:var(--ink-2);
  text-align:center;transition:all .18s var(--ease-out)}
.fmt svg{width:40px;height:32px;margin-bottom:4px;color:var(--ink-2)}
.fmt b{font-size:.8rem;font-weight:600;line-height:1.2}
.fmt i{font-style:normal;font-size:.7rem;color:var(--ink-3)}
.fmt.is-on{border-color:var(--blue);background:#f2f6ff;color:var(--blue);box-shadow:0 0 0 3px rgba(27,77,228,.1)}
.fmt.is-on svg,.fmt.is-on i{color:var(--blue)}

.tool-foot{padding:clamp(16px,3vw,24px);border-top:1px solid var(--line-2)}
.warns{list-style:none;display:grid;gap:6px;margin-bottom:14px}
.warns li{font-size:.84rem;padding:.5rem .7rem;border-radius:9px;display:flex;gap:.5rem;
  align-items:flex-start;line-height:1.45}
.warns li.ok{background:#eefaf4;color:var(--ok)}
.warns li.warn{background:#fff6e8;color:var(--warn)}
.warns li.bad{background:#fdeef0;color:var(--bad)}
.dl-row{display:flex;gap:10px;flex-wrap:wrap;align-items:stretch}
.dl-row .btn-primary{flex:1 1 260px}
.privacy{margin-top:12px;font-size:.83rem;color:var(--ink-3)}
.warn-js{margin-top:10px;font-size:.86rem;color:var(--bad)}

/* 7. Secciones ---------------------------------------------- */
.sec{padding-block:clamp(38px,6vw,62px)}
.sec h2{font-size:clamp(1.4rem,3vw,1.95rem);margin-bottom:1.4rem}
.sec h3{font-size:1.02rem;margin-bottom:.35rem}

.steps{list-style:none;display:grid;grid-template-columns:1fr;gap:16px;counter-reset:s}
.steps li{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:22px;box-shadow:var(--shadow-sm)}
.step-n{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:var(--grad);color:#fff;font-family:var(--display);font-weight:700;margin-bottom:12px}
.steps p{font-size:.93rem;color:var(--ink-2)}

.ideas{display:grid;grid-template-columns:1fr;gap:14px}
.idea{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;
  box-shadow:var(--shadow-sm);transition:transform .2s var(--ease-out),box-shadow .2s var(--ease-out)}
.idea:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.idea-ico{font-size:1.5rem;display:block;margin-bottom:8px}
.idea p{font-size:.9rem;color:var(--ink-2)}

.prose{max-width:none}
.prose h3{font-size:1.15rem;margin-top:1.6rem;margin-bottom:.5rem}
.prose p{max-width:78ch;color:var(--ink-2);margin-bottom:.9rem}

.faq{display:grid;gap:8px;max-width:900px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:0 16px;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;
  display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:.96rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.3rem;color:var(--blue);font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 16px;font-size:.92rem;color:var(--ink-2);max-width:78ch}

.site-footer{border-top:1px solid var(--line);background:#fff;margin-top:20px}
.footer-inner{padding-block:28px;display:grid;gap:10px}
.foot-brand{font-size:.92rem}
.foot-links{display:flex;gap:18px;font-size:.88rem;color:var(--ink-2)}
.foot-links a:hover{color:var(--blue)}
.foot-note{font-size:.78rem;color:var(--ink-3);max-width:70ch}

/* 8. Huecos publicitarios ----------------------------------- */
.ad-slot{border:1.5px dashed #c9d3e6;border-radius:var(--r);background:#eef2f9;
  display:grid;place-items:center;color:#9aa6bd;font-size:.72rem;font-weight:700;
  letter-spacing:.22em}
.ad-leaderboard{min-height:104px;margin-block:8px}
.ad-incontent{min-height:262px;margin-block:8px}
.ad-popup{min-height:250px;width:100%}
.ad-corner{min-height:96px;width:100%}

.ad-dialog{border:0;border-radius:18px;padding:20px;max-width:min(360px,92vw);
  box-shadow:0 30px 80px -20px rgba(15,27,76,.5);position:relative}
.ad-dialog::backdrop{background:rgba(14,20,36,.5)}
.ad-dialog-title{font-weight:600;font-size:.95rem;margin-bottom:12px;padding-right:28px}
.ad-dialog .btn{margin-top:12px;width:100%}
.ad-close{position:absolute;top:8px;right:10px;width:32px;height:32px;border-radius:50%;
  font-size:1.4rem;line-height:1;color:var(--ink-3);display:grid;place-items:center}
.ad-close:hover{background:var(--line-2);color:var(--ink)}

.ad-toast{position:fixed;right:14px;bottom:14px;z-index:60;width:min(300px,calc(100vw - 28px));
  background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:10px;
  box-shadow:0 18px 40px -16px rgba(15,27,76,.4)}
.ad-toast .ad-close{top:2px;right:2px;width:26px;height:26px;font-size:1.15rem}
.ad-toast[hidden]{display:none}

/* 9. Responsive --------------------------------------------- */
@media (min-width:720px){
  .steps{grid-template-columns:repeat(3,1fr)}
  .ideas{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr auto;align-items:center}
  .foot-note{grid-column:1/-1}
}
@media (min-width:960px){
  .tool-body{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}
  .tool-preview{border-right:1px solid var(--line-2)}
  .tool-controls{border-top:0}
  #qr-canvas{max-width:320px}
  .ideas{grid-template-columns:repeat(3,1fr)}
  .viewer{height:320px}
}
@media (max-width:959px){
  .site-nav{display:none}
}

/* 10. Reduced motion (solo efectos intrusivos) --------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .idea:hover{transform:none}
}