/* =============================================================
   QR3D Vortex — hoja de estilos única · identidad VÓRTEX
   1 Tokens · 2 Reset · 3 Utilidades · 4 Tipografía · 5 Componentes
   6 Herramienta · 7 Secciones · 8 Anuncios · 9 Responsive · 10 Motion
   ============================================================= */

/* ---------- 1. Tokens ---------- */
/* Oscuro SIEMPRE por defecto: es la identidad de VÓRTEX, y no depende del
   ajuste del sistema operativo de quien entra. El modo claro solo aparece si
   la persona lo pide con el interruptor, y esa eleccion se recuerda. */
:root{
  --bg:#050505;
  --bg-2:#0A0A0F;
  --surface:#12121C;
  --surface-2:#1A1A2E;
  --surface-3:#0E0E16;
  --line:rgba(201,168,76,.18);
  --line-2:rgba(240,244,255,.09);
  --ink:#F0F4FF;
  --ink-2:#C4CADD;
  --muted:#9AA0B5;
  --gold:#C9A84C;
  --gold-light:#F5D78E;
  --gold-mid:#C9A84C;
  --gold-soft:rgba(201,168,76,.10);
  --blue:#0047FF;
  --blue-hi:#2E68FF;
  --blue-glow:rgba(0,71,255,.40);
  --on-blue:#FFFFFF;
  --ok:#37D8A0;      --ok-soft:rgba(55,216,160,.12);
  --warn:#F0B450;    --warn-soft:rgba(240,180,80,.12);
  --danger:#FF7B72;  --danger-soft:rgba(255,123,114,.12);
  --qr-stage:#E9E8E3;
  --shadow:0 1px 2px rgba(0,0,0,.5), 0 12px 34px rgba(0,0,0,.42);
  --shadow-lg:0 2px 8px rgba(0,0,0,.55), 0 30px 70px rgba(0,0,0,.5);
  --radius:18px;
  --radius-s:11px;
  --display:"Clash Display","Space Grotesk",system-ui,sans-serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ease:cubic-bezier(.16,.84,.34,1);
  --wrap:1280px;
  color-scheme:dark;
}

:root[data-theme="light"]{
  --bg:#F3F4F7;
  --bg-2:#FFFFFF;
  --surface:#FFFFFF;
  --surface-2:#F7F8FB;
  --surface-3:#FFFFFF;
  --line:rgba(139,105,20,.24);
  --line-2:rgba(10,10,15,.09);
  --ink:#0A0A0F;
  --ink-2:#3A3C48;
  --muted:#666B7C;
  --gold:#8B6914;
  --gold-light:#A6873B;
  --gold-mid:#8B6914;
  --gold-soft:rgba(139,105,20,.08);
  --blue:#0038CC;
  --blue-hi:#0047FF;
  --blue-glow:rgba(0,71,255,.22);
  --ok:#0E7A55;      --ok-soft:rgba(14,122,85,.10);
  --warn:#9C4A0B;    --warn-soft:rgba(156,74,11,.10);
  --danger:#B3261E;  --danger-soft:rgba(179,38,30,.09);
  --qr-stage:#F0F0EC;
  --shadow:0 1px 2px rgba(10,10,15,.05), 0 10px 30px rgba(10,10,15,.07);
  --shadow-lg:0 2px 8px rgba(10,10,15,.06), 0 26px 64px rgba(10,10,15,.12);
  color-scheme:light;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;tab-size:2}
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;overscroll-behavior-y:none;
}
img,svg,canvas{display:block;max-width:100%}
img{height:auto}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
a{color:inherit;text-decoration:none}
p{text-wrap:pretty}
h1,h2,h3{text-wrap:balance;line-height:1.06;letter-spacing:-.02em}
::selection{background:var(--gold);color:#0A0A0F}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:6px}

/* ---------- 3. Utilidades ---------- */
.wrap{width:min(100% - 2rem, var(--wrap));margin-inline:auto}
.skip-link{position:fixed;top:-100px;left:1rem;padding:.6rem 1rem;background:var(--gold);color:#0A0A0F;z-index:9999;border-radius:8px;font-weight:700}
.skip-link:focus{top:1rem}
.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 4. Tipografía ---------- */
h1{font-family:var(--display);font-size:clamp(1.72rem,1.1rem + 3vw,3.5rem);font-weight:600;letter-spacing:-.03em}
.h2{font-family:var(--display);font-size:clamp(1.55rem,1.1rem + 1.8vw,2.3rem);font-weight:600;margin-bottom:.55rem;letter-spacing:-.025em}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.72rem;font-weight:700;letter-spacing:.18em;
  text-transform:uppercase;color:var(--gold-mid);margin-bottom:.7rem;
  padding:.4rem .8rem;border:1px solid var(--line);border-radius:999px;background:var(--gold-soft)}
.lede{font-size:clamp(.92rem,.9rem + .3vw,1.14rem);color:var(--ink-2);max-width:64ch;margin-top:.6rem}
.section-lede{color:var(--muted);max-width:62ch;margin-bottom:1.7rem}
.gold{color:var(--gold-mid)}

/* ---------- 5. Componentes ---------- */
.site-header{position:sticky;top:0;z-index:60;background:color-mix(in srgb,var(--bg) 86%,transparent);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line-2)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:62px}
.brand{display:flex;align-items:center;gap:.6rem;color:var(--ink)}
.brand-mark{flex:none}
.brand-name{font-family:var(--display);font-weight:600;font-size:1.08rem;letter-spacing:-.02em}
.brand-name .o{color:var(--gold-mid)}
.brand-sub{display:block;font-family:var(--sans);font-size:.63rem;font-weight:600;letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted);margin-top:1px}
.header-right{display:flex;align-items:center;gap:1.1rem}
.site-nav{display:none;gap:1.3rem;font-size:.9rem;font-weight:500;color:var(--ink-2)}
.site-nav a{padding:.3rem 0;border-bottom:1px solid transparent;transition:border-color .25s var(--ease),color .25s var(--ease)}
.site-nav a:hover{color:var(--gold-mid);border-color:var(--gold-mid)}
.theme-toggle{width:36px;height:36px;border:1px solid var(--line-2);border-radius:10px;display:flex;
  align-items:center;justify-content:center;color:var(--ink-2);transition:border-color .25s,color .25s}
.theme-toggle:hover{border-color:var(--gold-mid);color:var(--gold-mid)}
.theme-toggle .ic-sun{display:none}
:root[data-theme="light"] .theme-toggle .ic-sun{display:block}
:root[data-theme="light"] .theme-toggle .ic-moon{display:none}

.btn{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:.1rem;
  padding:.8rem 1.1rem;border-radius:var(--radius-s);font-weight:700;text-align:center;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--blue);color:var(--on-blue);width:100%;padding:1.05rem 1.2rem;
  box-shadow:0 8px 26px var(--blue-glow)}
.btn-primary:hover{background:var(--blue-hi);box-shadow:0 10px 32px var(--blue-glow)}
.btn-primary[disabled]{opacity:.5;box-shadow:none;cursor:not-allowed}
.btn-main{font-size:1.02rem;letter-spacing:-.01em}
.btn-sub{font-size:.75rem;font-weight:500;opacity:.9}
.btn-ghost{background:var(--surface-2);border:1px solid var(--line-2);color:var(--ink-2);font-size:.88rem;padding:.62rem .9rem}
.btn-ghost:hover{border-color:var(--gold-mid);color:var(--gold-mid)}
.mini-btn{display:inline-flex;align-items:center;gap:.35rem;background:var(--surface-2);border:1px solid var(--line-2);
  border-radius:9px;padding:.44rem .72rem;font-size:.83rem;font-weight:600;color:var(--ink-2);cursor:pointer;
  transition:border-color .2s,color .2s}
.mini-btn:hover{border-color:var(--gold-mid);color:var(--gold-mid)}

/* ---------- 6. La herramienta ---------- */
.hero{position:relative;padding:1.3rem 0 1.4rem}
.hero-fx{position:absolute;inset:-40px 0 auto 0;height:520px;z-index:0;pointer-events:none;
  opacity:.85;mask-image:linear-gradient(180deg,#000 0%,#000 45%,transparent 100%);
  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 45%,transparent 100%)}
.hero > *:not(.hero-fx){position:relative;z-index:1}

.tool-card{margin-top:1.1rem;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);padding:1.15rem;position:relative;overflow:hidden}
.tool-card::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:.8}
.noscript-note{background:var(--warn-soft);border:1px solid var(--line);color:var(--warn);padding:.8rem 1rem;border-radius:var(--radius-s);font-weight:600}
.tool-grid{display:flex;flex-direction:column;gap:1.15rem}
.tool-col-a,.tool-col-b{display:contents}
.tool-input{order:1}.qr-block{order:2}.tool-controls{order:3}.tool-out{order:4}
.field-group{padding-bottom:1.15rem;border-bottom:1px solid var(--line-2);margin-bottom:1.15rem}
.field-group:last-child{border-bottom:0;padding-bottom:0;margin-bottom:0}
.ctrl-title{font-family:var(--display);font-size:1.02rem;font-weight:600;margin-bottom:.75rem;letter-spacing:-.015em}
.ctrl-title .num{color:var(--gold-mid);margin-right:.45rem;font-variant-numeric:tabular-nums}
.lbl{display:block;font-size:.82rem;font-weight:700;color:var(--ink-2);margin:.9rem 0 .38rem}
.lbl:first-child{margin-top:0}
.lbl-note{font-weight:500;color:var(--muted)}
.hint{font-size:.79rem;color:var(--muted);margin-top:.4rem;line-height:1.48}
.hint a{color:var(--gold-mid);text-decoration:underline;text-underline-offset:2px}
.inp{width:100%;padding:.74rem .85rem;border:1px solid var(--line-2);border-radius:var(--radius-s);
  background:var(--surface-2);font:inherit;font-size:.95rem;color:var(--ink);transition:border-color .2s,box-shadow .2s}
.inp::placeholder{color:var(--muted);opacity:.75}
.inp:focus{outline:none;border-color:var(--gold);background:var(--surface-3);box-shadow:0 0 0 3px var(--gold-soft)}
select.inp{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 18px) 55%,calc(100% - 13px) 55%;background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:2.2rem}
.rng{width:100%;accent-color:var(--gold);margin-top:.5rem}
.row2{display:grid;gap:.8rem}
.check-wrap{display:flex;align-items:flex-end}
.check{display:inline-flex;align-items:center;gap:.45rem;font-size:.87rem;color:var(--ink-2);padding-bottom:.74rem}
.check input{accent-color:var(--gold);width:16px;height:16px}

/* pestañas de tipo de contenido */
.seg{display:flex;gap:.35rem;overflow-x:auto;padding-bottom:.35rem;margin-bottom:.9rem;scrollbar-width:thin}
.seg::-webkit-scrollbar{height:4px}
.seg::-webkit-scrollbar-thumb{background:var(--line);border-radius:2px}
.seg-btn{flex:none;display:inline-flex;align-items:center;gap:.38rem;padding:.5rem .8rem;border-radius:9px;
  font-size:.85rem;font-weight:600;color:var(--muted);border:1px solid var(--line-2);background:var(--surface-2);
  transition:all .2s var(--ease)}
.seg-btn svg{width:15px;height:15px;flex:none}
.seg-btn:hover{color:var(--ink-2);border-color:var(--line)}
.seg-btn.is-on{background:var(--gold);border-color:var(--gold);color:#0A0A0F}

/* plantillas */
.presets{display:flex;gap:.4rem;flex-wrap:nowrap;overflow-x:auto;padding-bottom:.3rem;scrollbar-width:thin}
.presets::-webkit-scrollbar{height:4px}
.presets::-webkit-scrollbar-thumb{background:var(--line);border-radius:2px}
.preset{flex:none}
.preset{display:inline-flex;align-items:center;gap:.4rem;padding:.45rem .8rem;border:1px solid var(--line);
  border-radius:999px;background:var(--gold-soft);font-size:.83rem;font-weight:600;color:var(--ink-2);
  transition:all .2s var(--ease)}
.preset:hover{border-color:var(--gold);color:var(--gold-mid);transform:translateY(-1px)}

.chips{display:flex;flex-wrap:wrap;gap:.45rem}
.chip{padding:.45rem .8rem;border:1px solid var(--line-2);border-radius:999px;background:var(--surface-2);
  font-size:.85rem;font-weight:600;color:var(--ink-2);transition:all .2s var(--ease)}
.chip:hover{border-color:var(--line)}
.chip.is-on{background:var(--gold);border-color:var(--gold);color:#0A0A0F}

.colors{grid-template-columns:1fr 1fr auto;align-items:end;gap:.6rem}
.color-field{display:flex;flex-direction:column;gap:.3rem;font-size:.77rem;font-weight:600;color:var(--muted)}
.color-field input[type=color]{width:100%;height:42px;border:1px solid var(--line-2);border-radius:var(--radius-s);background:none;padding:3px;cursor:pointer}
#c-swap{height:42px;font-size:1.05rem;padding:0 .75rem}
.combos{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.55rem}
.combo{width:40px;height:23px;border-radius:6px;border:1px solid var(--line-2);overflow:hidden;display:flex;padding:0}
.combo span{flex:1}
.combo.is-on{outline:2px solid var(--gold);outline-offset:1px}

.emoji-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:.35rem}
.emoji-btn{aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-size:1.12rem;
  border:1px solid var(--line-2);border-radius:9px;background:var(--surface-2);transition:all .18s var(--ease)}
.emoji-btn:hover{border-color:var(--line);transform:translateY(-1px)}
.emoji-btn.is-on{background:var(--gold-soft);border-color:var(--gold)}
.center-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;margin-top:.6rem}
.center-status{font-size:.79rem;color:var(--muted)}

.formats{display:grid;grid-template-columns:repeat(2,1fr);gap:.5rem}
.fmt{border:1px solid var(--line-2);border-radius:var(--radius-s);background:var(--surface-2);padding:.7rem .5rem;
  text-align:center;transition:all .2s var(--ease)}
.fmt svg{margin:0 auto .35rem;color:var(--muted)}
.fmt b{display:block;font-size:.81rem;font-weight:700}
.fmt:hover{border-color:var(--line);transform:translateY(-1px)}
.fmt.is-on{border-color:var(--gold);background:var(--gold-soft)}
.fmt.is-on svg{color:var(--gold-mid)}

.adv{margin-top:1rem;border:1px solid var(--line-2);border-radius:var(--radius-s);background:var(--surface-2);overflow:hidden}
.adv > summary{cursor:pointer;padding:.7rem .9rem;font-size:.86rem;font-weight:700;color:var(--ink-2);
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.adv > summary::-webkit-details-marker{display:none}
.adv > summary::after{content:"+";color:var(--gold-mid);font-weight:800}
.adv[open] > summary::after{content:"–"}
.adv-body{padding:0 .9rem .9rem}

.warnings{list-style:none;margin-top:.9rem;display:grid;gap:.4rem}
.warnings li{font-size:.82rem;padding:.58rem .72rem;border-radius:9px;line-height:1.42}
.warnings li.w-ok{background:var(--ok-soft);color:var(--ok)}
.warnings li.w-warn{background:var(--warn-soft);color:var(--warn)}
.warnings li.w-bad{background:var(--danger-soft);color:var(--danger);font-weight:600}

.tool-out,.qr-block{display:grid;gap:1rem;align-content:start;min-width:0}
.tool-input,.tool-controls{min-width:0}
.preview-block{border:1px solid var(--line-2);border-radius:var(--radius);background:var(--surface-2);overflow:hidden}
.preview-head{display:flex;justify-content:space-between;align-items:center;padding:.58rem .85rem;
  border-bottom:1px solid var(--line-2);font-size:.78rem;font-weight:700;color:var(--ink-2)}
.preview-head small{font-weight:500;color:var(--muted)}
.qr-holder{display:flex;align-items:center;justify-content:center;padding:1rem;min-height:220px;background:var(--qr-stage)}
.qr-holder canvas,.qr-holder svg{max-width:100%;height:auto;border-radius:8px}
.viewer{position:relative;height:270px;background:var(--surface-3);touch-action:none}
.viewer canvas{width:100%;height:100%;display:block}
.viewer-msg{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;
  padding:1.2rem;font-size:.85rem;color:var(--muted);line-height:1.5}

.downloads{display:grid;gap:.55rem}
.btn-row{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem}
.dl-status{font-size:.8rem;color:var(--muted);min-height:1.2em;text-align:center}
.share-row{display:flex;gap:.5rem;align-items:center;justify-content:center;flex-wrap:wrap;margin-top:.15rem}
.privacy-badge{margin-top:1.1rem;font-size:.82rem;color:var(--ink-2);background:var(--surface-2);
  border:1px solid var(--line-2);border-radius:var(--radius-s);padding:.68rem .85rem;text-align:center}

/* ---------- 7. Secciones ---------- */
.section{padding:2.8rem 0}
section[id],main [id]{scroll-margin-top:80px}
.steps{list-style:none;display:grid;gap:1rem}
.step{position:relative;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);
  padding:1.4rem 1.2rem 1.2rem;box-shadow:var(--shadow)}
.step-num{position:absolute;top:-13px;left:1.2rem;width:30px;height:30px;border-radius:50%;
  background:linear-gradient(140deg,var(--gold-light),var(--gold));color:#0A0A0F;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem}
.step-ico{width:30px;height:30px;color:var(--gold-mid);margin:.4rem 0 .7rem}
.step h3{font-size:1.05rem;font-weight:700;margin-bottom:.35rem}
.step p{font-size:.92rem;color:var(--ink-2)}

.cards{display:grid;gap:.9rem}
.card{background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius);padding:1.15rem;
  box-shadow:var(--shadow);transition:border-color .25s var(--ease),transform .25s var(--ease)}
.card:hover{border-color:var(--line);transform:translateY(-2px)}
.card h3{font-size:1rem;font-weight:700;margin-bottom:.35rem}
.card p{font-size:.9rem;color:var(--ink-2)}
.card a.card-link{color:var(--gold-mid);font-weight:600;font-size:.86rem;display:inline-block;margin-top:.5rem}

.prose h3{font-family:var(--display);font-size:1.18rem;font-weight:600;margin:1.7rem 0 .5rem;color:var(--ink)}
.prose p{max-width:74ch;color:var(--ink-2);margin-bottom:.7rem}
.prose strong{color:var(--ink)}

.faq{display:grid;gap:.5rem;max-width:80ch}
.faq details{background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius-s);padding:.9rem 1rem}
.faq summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:1rem;font-size:.95rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold-mid);font-weight:800;flex:none}
.faq details[open] summary::after{content:"–"}
.faq p{margin-top:.6rem;font-size:.92rem;color:var(--ink-2)}

.site-footer{border-top:1px solid var(--line-2);background:var(--bg-2);padding:2.2rem 0 1.5rem;margin-top:2rem}
.footer-inner{display:grid;gap:1.2rem}
.footer-brand{font-family:var(--display);font-weight:600;font-size:1.06rem}
.footer-brand .o{color:var(--gold-mid)}
.footer-note{font-size:.85rem;color:var(--muted);max-width:48ch;margin-top:.3rem}
.footer-links{display:flex;flex-wrap:wrap;gap:1.1rem;font-size:.87rem;color:var(--ink-2)}
.footer-links a:hover{color:var(--gold-mid)}
.credits{text-align:center;font-size:.75rem;color:var(--muted);margin-top:1.5rem}
.credits a{color:var(--gold-mid)}

/* ---------- 8. Huecos de anuncio (placeholders vacíos) ---------- */
.ad-slot{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.3rem;
  border:1px dashed var(--line);border-radius:var(--radius-s);background:var(--surface-2);
  color:var(--muted);text-align:center;padding:1rem}
.ad-tag{font-size:.71rem;font-weight:800;letter-spacing:.18em;color:var(--gold-mid)}
.ad-size{font-size:.69rem}
.ad-leaderboard{min-height:104px;margin:.6rem 0 1.4rem}
.ad-incontent{min-height:260px;max-width:360px;margin:1rem auto 2rem}
.ad-modal{border:0;padding:0;margin:auto;border-radius:var(--radius);box-shadow:var(--shadow-lg);
  max-width:min(92vw,360px);background:var(--surface);color:var(--ink);border:1px solid var(--line-2)}
.ad-modal::backdrop{background:rgba(5,5,5,.66);backdrop-filter:blur(3px)}
.ad-modal-inner{position:relative;padding:1.35rem 1.1rem 1.1rem;display:grid;gap:.8rem}
.ad-modal-head{font-weight:800;font-size:.98rem;text-align:center}
.ad-modal-slot{min-height:250px}
.ad-continue{width:100%}
.ad-close{position:absolute;top:.4rem;right:.5rem;width:30px;height:30px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:1.3rem;line-height:1;color:var(--muted);
  background:var(--surface-2);z-index:2}
.ad-close:hover{color:var(--ink)}
.ad-corner{position:fixed;right:12px;bottom:12px;z-index:70;width:min(300px,calc(100vw - 24px));
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--radius-s);box-shadow:var(--shadow-lg);padding:.5rem}
.ad-corner[hidden]{display:none}
.ad-corner-slot{min-height:100px}

/* ---------- 9. Responsive ---------- */
@media (min-width:540px){
  .row2{grid-template-columns:1fr 1fr}
  .formats{grid-template-columns:repeat(4,1fr)}
}
@media (min-width:600px){ .site-nav{display:flex} }
@media (min-width:720px){
  .hero{padding:2.6rem 0 2rem}
  .presets{flex-wrap:wrap;overflow:visible}
  .tool-card{padding:1.7rem}
  .steps{grid-template-columns:repeat(3,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr auto;align-items:center}
}
@media (min-width:960px){
  .tool-grid{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(330px,.96fr);gap:0 2rem;align-items:start}
  .tool-col-a,.tool-col-b{display:grid;gap:1.15rem;align-content:start;min-width:0}
  .cards{grid-template-columns:repeat(3,1fr)}
  .viewer{height:310px}
  .qr-holder{min-height:250px}
  .formats{grid-template-columns:repeat(4,1fr)}
}
@media (min-width:1280px){ .viewer{height:340px} }

/* ---------- 10. Reveals y motion ---------- */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
[data-reveal].is-in{opacity:1;transform:none}
.no-js [data-reveal]{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none;transition:none}
  .hero-fx{display:none}
  .card:hover,.fmt:hover,.preset:hover,.emoji-btn:hover{transform:none}
}