/* ============================================================
   MatrizQR — estilos
   1. Tokens  2. Reset  3. Layout  4. Header/Footer
   5. Hero  6. Tool card  7. Preview  8. Downloads/warnings
   9. Ad slots  10. Content sections  11. FAQ  12. Responsive
   ============================================================ */

/* 1. Tokens ------------------------------------------------- */
:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --ink: #171722;
  --ink-soft: #55556a;
  --line: #e6e4dd;
  --line-strong: #d5d2c8;
  --accent: #4f46e5;
  --accent-ink: #ffffff;
  --accent-soft: #eef0ff;
  --ok: #14804a;
  --ok-soft: #e6f4ec;
  --warn: #9a5b00;
  --warn-soft: #fbf0dd;
  --bad: #b42318;
  --bad-soft: #fbe9e7;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(20,20,40,.04), 0 12px 32px -12px rgba(20,20,40,.18);
  --sans: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --display: "Space Grotesk", var(--sans);
  --wrap: 1120px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14141a;
    --surface: #1d1d26;
    --ink: #f2f1ee;
    --ink-soft: #a7a6b4;
    --line: #2c2c38;
    --line-strong: #3a3a48;
    --accent: #8b84ff;
    --accent-ink: #14141a;
    --accent-soft: #24243a;
    --ok-soft: #14281d;
    --warn-soft: #2c2312;
    --bad-soft: #2c1917;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 16px 40px -16px rgba(0,0,0,.6);
  }
}

/* 2. Reset -------------------------------------------------- */
*, *::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: 1.6;
  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; }
input, select { font: inherit; color: inherit; }
p { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; line-height: 1.1; letter-spacing: -0.02em; font-family: var(--display); }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--accent); color: var(--accent-ink);
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

/* 3. Layout ------------------------------------------------- */
.wrap { width: min(100% - 2.4rem, var(--wrap)); margin-inline: auto; }
.section { padding-block: clamp(2.6rem, 6vw, 4.4rem); }
.is-hidden { display: none !important; }

/* 4. Header / Footer --------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 800; font-family: var(--display); font-size: 1.15rem; }
.brand-mark svg { fill: var(--accent); }
.header-link { color: var(--ink-soft); font-weight: 600; font-size: .95rem; }
.header-link:hover { color: var(--ink); }

.site-footer { border-top: 1px solid var(--line); margin-top: 2rem; padding-block: 2rem; }
.footer-inner { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; align-items: center; justify-content: space-between; }
.footer-brand { font-family: var(--display); font-weight: 800; }
.footer-by {
  font-family: var(--sans); font-weight: 600; font-size: .85rem;
  color: var(--ink-soft); margin-left: .5rem;
  border-bottom: 1px solid transparent; transition: color .18s var(--ease-out), border-color .18s var(--ease-out);
}
.footer-by:hover { color: var(--accent); border-bottom-color: var(--accent); }
.footer-links { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.footer-links a { color: var(--ink-soft); font-weight: 600; font-size: .92rem; }
.footer-links a:hover { color: var(--ink); }
.footer-copy { color: var(--ink-soft); font-size: .85rem; width: 100%; }

/* 5. Hero --------------------------------------------------- */
.hero { padding-block: clamp(1.8rem, 4vw, 2.8rem) 1.2rem; text-align: center; }
.hero h1 { font-size: clamp(2rem, 5.4vw, 3.1rem); font-weight: 800; }
.subtitle { max-width: 46ch; margin: .9rem auto 0; color: var(--ink-soft); font-size: clamp(1rem, 2vw, 1.12rem); }
.subtitle strong { color: var(--ink); font-weight: 700; }

/* 6. Tool card --------------------------------------------- */
.tool-wrap { padding-bottom: 1rem; }
.tool-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  box-shadow: var(--shadow);
  padding: clamp(1.1rem, 2.6vw, 1.8rem);
}
.tool-grid { display: grid; grid-template-columns: 1fr; gap: 1.6rem; }

/* bloques de paso (1 = QR, 2 = objeto 3D) */
.step-block + .step-block {
  margin-top: 1.8rem; padding-top: 1.8rem;
  border-top: 1px solid var(--line);
}
.step-head { display: flex; gap: .8rem; align-items: flex-start; margin-bottom: 1.2rem; }
.step-badge {
  flex: 0 0 auto; display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: 999px;
  background: var(--accent); color: var(--accent-ink);
  font-family: var(--display); font-weight: 800; font-size: .95rem;
}
.step-title { font-size: clamp(1.15rem, 2.6vw, 1.4rem); font-weight: 700; margin-bottom: .15rem; }
.step-sub { color: var(--ink-soft); font-size: .92rem; max-width: 60ch; }
.opt-tag {
  display: inline-block; vertical-align: middle; margin-left: .4rem;
  padding: .1rem .5rem; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-family: var(--sans); font-size: .68rem; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
}
.step-3d .step-badge { background: var(--ink); color: var(--surface); }
.hint-3d { margin-top: .2rem; padding: .6rem .7rem; background: var(--bg); border-radius: var(--radius-sm); }

/* descargas de imagen (paso 1) */
.dl-img-row { display: flex; gap: .5rem; }
.btn-dl.big-img {
  flex: 1 1 auto; background: var(--ink); color: var(--surface); border-color: var(--ink);
  font-size: 1rem; padding: .85rem 1rem;
}
.btn-dl.big-img:hover { filter: brightness(1.15); }
.dl-img-row .btn-dl:not(.big-img) { flex: 0 0 auto; padding-inline: 1.3rem; }

.field { margin-bottom: 1.15rem; }
.field:last-child { margin-bottom: 0; }
.field > label { display: block; font-weight: 700; font-size: .9rem; margin-bottom: .4rem; }
.field .hint { color: var(--ink-soft); font-size: .82rem; margin-top: .35rem; }
.field.two { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; }

input[type="text"], input[type="url"], select {
  width: 100%; padding: .7rem .8rem;
  background: var(--bg); border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); transition: border-color .2s var(--ease-out), box-shadow .2s var(--ease-out);
}
input[type="text"]:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); outline: none; }

/* segmented control */
.seg { display: inline-flex; background: var(--bg); border: 1px solid var(--line-strong); border-radius: 999px; padding: 3px; }
.seg-btn { padding: .42rem 1rem; border-radius: 999px; font-weight: 600; font-size: .9rem; color: var(--ink-soft); }
.seg-btn.is-on { background: var(--accent); color: var(--accent-ink); }

/* style + format pills */
.style-row, .format-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.style-btn {
  padding: .5rem .85rem; border: 1px solid var(--line-strong); border-radius: 999px;
  font-weight: 600; font-size: .88rem; color: var(--ink-soft);
  transition: all .18s var(--ease-out);
}
.style-btn:hover { border-color: var(--accent); color: var(--ink); }
.style-btn.is-on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.format-row { display: grid; grid-template-columns: repeat(3, 1fr); }
.format-btn {
  display: flex; flex-direction: column; align-items: center; gap: .4rem; text-align: center;
  padding: .8rem .5rem; border: 1.5px solid var(--line-strong); border-radius: var(--radius-sm);
  font-weight: 600; font-size: .85rem; color: var(--ink-soft);
  transition: all .18s var(--ease-out);
}
.format-btn .fmt-ico svg { width: 34px; height: 34px; color: currentColor; }
.format-btn:hover { border-color: var(--accent); color: var(--ink); }
.format-btn.is-on { border-color: var(--accent); background: var(--accent-soft); color: var(--ink); }

/* colors */
.colors { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; }
.color-pick label { display: block; font-weight: 600; font-size: .82rem; margin-bottom: .35rem; color: var(--ink-soft); }
input[type="color"] {
  width: 100%; height: 46px; padding: 3px; border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); background: var(--bg); cursor: pointer;
}

/* center emoji/logo */
.center-row { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
.emoji-row { display: flex; gap: .3rem; flex-wrap: wrap; }
.emoji-btn {
  width: 40px; height: 40px; font-size: 1.2rem; line-height: 1;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--bg);
  transition: all .16s var(--ease-out);
}
.emoji-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.emoji-btn.is-on { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 0 2px var(--accent-soft); }
.btn-file {
  display: inline-flex; align-items: center; padding: .5rem .9rem; font-weight: 600; font-size: .88rem;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--bg); cursor: pointer;
  transition: border-color .16s var(--ease-out);
}
.btn-file:hover { border-color: var(--accent); }
.btn-ghost {
  padding: .5rem .9rem; font-weight: 600; font-size: .86rem; color: var(--ink-soft);
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink-soft); }

/* 7. Preview ------------------------------------------------ */
.preview { display: flex; flex-direction: column; gap: 1rem; }
.preview-block { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.preview-head { padding: .5rem .8rem; border-bottom: 1px solid var(--line); }
.preview-tag { font-size: .78rem; font-weight: 600; color: var(--ink-soft); letter-spacing: .01em; }
.qr-canvas {
  display: grid; place-items: center; padding: 1rem; min-height: 240px;
}
.qr-canvas canvas, .qr-canvas svg { width: min(240px, 70vw) !important; height: auto !important; border-radius: 8px; }
.viewer {
  position: relative; width: 100%; aspect-ratio: 4 / 3; min-height: 240px;
  display: grid; place-items: center; touch-action: none;
}
.viewer canvas { width: 100% !important; height: 100% !important; }
.viewer-msg { color: var(--ink-soft); font-size: .9rem; padding: 1rem; text-align: center; }

/* 8. Warnings + downloads ---------------------------------- */
.warnings { display: flex; flex-direction: column; gap: .45rem; }
.warn-item {
  display: flex; gap: .5rem; align-items: flex-start;
  padding: .55rem .7rem; border-radius: var(--radius-sm); font-size: .85rem; font-weight: 500;
  border: 1px solid transparent;
}
.warn-item .wi-ico { flex: 0 0 auto; font-weight: 700; }
.warn-item.ok  { background: var(--ok-soft);  color: var(--ok);  border-color: color-mix(in srgb, var(--ok) 22%, transparent); }
.warn-item.warn{ background: var(--warn-soft);color: var(--warn);border-color: color-mix(in srgb, var(--warn) 26%, transparent); }
.warn-item.bad { background: var(--bad-soft); color: var(--bad); border-color: color-mix(in srgb, var(--bad) 26%, transparent); }

.downloads { display: flex; flex-direction: column; gap: .7rem; margin-top: .2rem; }
.btn-dl {
  padding: .7rem 1rem; font-weight: 700; border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong); background: var(--surface);
  transition: all .16s var(--ease-out);
}
.btn-dl:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn-dl.big {
  width: 100%; background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
  font-size: 1.02rem; padding: .95rem 1rem;
  box-shadow: 0 8px 20px -8px color-mix(in srgb, var(--accent) 70%, transparent);
}
.btn-dl.big:hover { filter: brightness(1.05); }
.dl-note { color: var(--ink-soft); font-size: .8rem; margin-top: .4rem; text-align: center; }
.dl-secondary { display: flex; flex-wrap: wrap; gap: .5rem; }
.dl-secondary .btn-dl { flex: 1 1 auto; font-size: .9rem; }
.btn-dl[disabled] { opacity: .55; cursor: progress; transform: none; }

.privacy-badge {
  margin-top: 1.3rem; padding-top: 1rem; border-top: 1px dashed var(--line-strong);
  color: var(--ink-soft); font-size: .85rem; text-align: center;
}
.noscript-note { margin-top: 1rem; padding: 1rem; background: var(--warn-soft); color: var(--warn); border-radius: var(--radius-sm); }

/* tool states */
.tool-card[data-state="busy"] .btn-dl { pointer-events: none; }

/* 9. Ad slots ---------------------------------------------- */
.ad-slot {
  position: relative; display: grid; place-items: center;
  border: 1.5px dashed var(--line-strong); border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--ink) 3%, transparent);
  color: var(--ink-soft);
}
.ad-label { font-size: .72rem; font-weight: 700; letter-spacing: .14em; opacity: .6; }
.ad-leaderboard { min-height: 90px; margin-block: 1.6rem; }
.ad-incontent { min-height: 250px; margin-block: .5rem; }
.ad-rect { width: 100%; min-height: 200px; margin-block: .6rem; }

.ad-modal { border: 0; border-radius: var(--radius); padding: 0; background: transparent; max-width: 380px; width: calc(100% - 2rem); box-shadow: var(--shadow); }
.ad-modal::backdrop { background: rgba(10,10,20,.5); backdrop-filter: blur(2px); }
.ad-modal-inner { position: relative; background: var(--surface); border-radius: var(--radius); padding: 1.4rem; text-align: center; }
.ad-modal-title { font-family: var(--display); font-weight: 700; margin-bottom: .8rem; color: var(--ok); }
.ad-modal-close { position: absolute; top: .5rem; right: .7rem; font-size: 1.5rem; line-height: 1; color: var(--ink-soft); }
.ad-modal .btn-ghost { margin-top: .9rem; }

.ad-toast {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 60;
  width: 220px; min-height: 90px; padding: 1rem .9rem .9rem;
  display: grid; place-items: center;
  background: var(--surface); border: 1.5px dashed var(--line-strong); border-radius: var(--radius-sm);
  box-shadow: var(--shadow); color: var(--ink-soft);
}
.ad-toast-close { position: absolute; top: .2rem; right: .45rem; font-size: 1.2rem; line-height: 1; color: var(--ink-soft); }

/* 10. Content sections ------------------------------------- */
.section h2 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); font-weight: 700; margin-bottom: 1.4rem; }
.steps { list-style: none; display: grid; gap: 1rem; grid-template-columns: 1fr; counter-reset: none; }
.step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem; position: relative; }
.step-num {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 999px;
  background: var(--accent); color: var(--accent-ink); font-weight: 800; font-family: var(--display); margin-bottom: .7rem;
}
.step h3 { font-size: 1.1rem; margin-bottom: .3rem; }
.step p { color: var(--ink-soft); font-size: .95rem; }

.ideas { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.idea { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem; }
.idea-ico { font-size: 1.7rem; display: block; margin-bottom: .5rem; }
.idea h3 { font-size: 1.05rem; margin-bottom: .3rem; }
.idea p { color: var(--ink-soft); font-size: .93rem; }

.prose { max-width: 74ch; }
.prose h2 { margin-bottom: 1rem; }
.prose p { margin-bottom: 1rem; color: var(--ink-soft); }
.prose strong { color: var(--ink); font-weight: 700; }

/* 11. FAQ --------------------------------------------------- */
.faq { display: grid; gap: .7rem; max-width: 80ch; }
.faq details {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: .3rem .3rem;
}
.faq summary {
  cursor: pointer; font-weight: 700; padding: .85rem 1rem; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.3rem; color: var(--accent); font-weight: 700; transition: transform .2s var(--ease-out); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 1rem 1rem; color: var(--ink-soft); }

/* 12. Responsive ------------------------------------------- */
@media (min-width: 720px) {
  .ideas { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 960px) {
  .tool-grid { grid-template-columns: 1.05fr .95fr; align-items: start; }
  .ideas { grid-template-columns: repeat(3, 1fr); }
  .qr-canvas canvas, .qr-canvas svg { width: 260px !important; }
}

/* reduce motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

/* reveal (progressive enhancement, safe if JS off) */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.is-ready .reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }