/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #101014;
  --panel: #17171d;
  --panel-2: #1e1e26;
  --border: #2b2b35;
  --cream: #f2f1ec;
  --text: #e9e8e4;
  --text-dim: #a6a5b0;
  --accent: #ff7a45;
  --accent-2: #6fe3c4;
  --danger: #ff5d5d;
  --ok: #6fe3c4;
  --sans: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 14px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --gutter: 1.25rem;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
img, svg, video { 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, h4 { text-wrap: balance; line-height: 1.15; letter-spacing: -0.01em; }
::selection { background: var(--accent); color: #101014; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.is-hidden { display: none !important; }

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--cream); color: var(--bg);
  z-index: 9999; border-radius: 8px; font-weight: 700;
}
.skip-link:focus { top: 1rem; }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 var(--gutter); }

/* =============================================================
   3. Header / footer
   ============================================================= */
.site-header { padding: 1.25rem 0; border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.logo { font-family: var(--mono); font-weight: 700; font-size: 1.1rem; letter-spacing: -0.02em; }
.logo-mark { color: var(--accent); }
.logo-accent { color: var(--accent-2); }
.header-tag { color: var(--text-dim); font-size: .85rem; }

.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; margin-top: 3rem; color: var(--text-dim); font-size: .85rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer-nav { display: flex; gap: 1.25rem; }
.footer-nav a:hover { color: var(--text); }

/* =============================================================
   4. Hero
   ============================================================= */
.hero { padding: 2.5rem 0 1.5rem; text-align: center; }
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); max-width: 760px; margin: 0 auto .75rem; }
.hero-sub { color: var(--text-dim); max-width: 560px; margin: 0 auto; font-size: 1.02rem; }

/* =============================================================
   5. Tool card
   ============================================================= */
.tool-section { padding-bottom: 1.5rem; }
.js-required { background: rgba(255,122,69,.12); border: 1px solid rgba(255,122,69,.35); color: var(--text); padding: .9rem 1rem; border-radius: 10px; margin-bottom: 1.1rem; font-weight: 600; }
.tool-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.tool-grid { display: grid; gap: 1.75rem; grid-template-columns: 1fr; min-width: 0; }
.tool-controls, .tool-preview { min-width: 0; }
.tool-preview { order: -1; }

.field-group { margin-bottom: 1.1rem; }
.field-group label { display: block; font-size: .82rem; font-weight: 700; color: var(--text-dim); margin-bottom: .4rem; }
.field-group input[type="text"] {
  width: 100%; padding: .65rem .8rem; border-radius: 10px;
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  font-size: .95rem;
}
.field-group input[type="text"]:focus { border-color: var(--accent); }
.checkbox-label { display: flex; align-items: center; gap: .5rem; font-size: .85rem; font-weight: 500; color: var(--text); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
input[type="color"] {
  width: 100%; height: 42px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--panel-2); padding: 3px; cursor: pointer;
}
input[type="range"] { width: 100%; accent-color: var(--accent); }

.tabs { display: flex; gap: .5rem; }
.tab {
  padding: .5rem 1rem; border-radius: 999px; border: 1px solid var(--border);
  color: var(--text-dim); font-weight: 700; font-size: .85rem; transition: all .2s var(--ease-out);
}
.tab.is-active { background: var(--accent); color: #1a0f08; border-color: var(--accent); }

.style-grid, .format-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .6rem; }
.pick-card {
  border: 1px solid var(--border); border-radius: 10px; padding: .7rem;
  text-align: left; background: var(--panel-2); transition: border-color .2s var(--ease-out);
}
.pick-card:hover { border-color: var(--accent-2); }
.pick-card.is-active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.pick-card .pick-title { font-weight: 700; font-size: .88rem; display: block; }
.pick-card .pick-desc { font-size: .74rem; color: var(--text-dim); display: block; margin-top: .2rem; }

.emoji-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(2rem, 1fr)); gap: .35rem; margin-bottom: .6rem; }
.emoji-btn {
  aspect-ratio: 1; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); font-size: 1.1rem; display: flex; align-items: center; justify-content: center;
}
.emoji-btn.is-active { border-color: var(--accent); background: rgba(255,122,69,.15); }
.logo-upload { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; }
.btn-text-quitar { font-size: .8rem; color: var(--danger); font-weight: 700; text-decoration: underline; }

.print-warnings { display: flex; flex-direction: column; gap: .5rem; margin-top: .5rem; }
.warning-pill {
  font-size: .8rem; font-weight: 600; padding: .5rem .7rem; border-radius: 8px;
  background: rgba(255,93,93,.12); color: #ff9b9b; border: 1px solid rgba(255,93,93,.3);
}
.warning-pill.is-ok { background: rgba(111,227,196,.1); color: var(--ok); border-color: rgba(111,227,196,.3); }

/* =============================================================
   6. Previews
   ============================================================= */
.tool-preview { display: flex; flex-direction: column; gap: 1rem; }
.preview-2d, .preview-3d {
  background: #fff; border-radius: 10px; overflow: hidden;
  border: 1px solid var(--border);
}
.qr-canvas-wrap { display: flex; align-items: center; justify-content: center; min-height: 220px; padding: 1rem; }
.qr-canvas-wrap canvas, .qr-canvas-wrap img { max-width: 100%; height: auto; }

.preview-3d { background: #1c1c24; position: relative; }
.viewer3d { width: 100%; height: 260px; position: relative; touch-action: none; }
.viewer3d canvas { width: 100% !important; height: 100% !important; display: block; }
.viewer3d-placeholder {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--text-dim); font-size: .85rem; text-align: center; padding: 1rem;
}
.viewer3d-hint { text-align: center; font-size: .75rem; color: var(--text-dim); padding: .4rem 0; }

.download-row { display: flex; gap: .6rem; flex-wrap: wrap; }
.btn {
  padding: .75rem 1.1rem; border-radius: 10px; font-weight: 700; font-size: .92rem;
  transition: transform .15s var(--ease-out), opacity .15s var(--ease-out);
  flex: 1 1 auto; text-align: center;
}
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--accent); color: #1a0f08; }
.btn-secondary { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); }
.btn-3d { background: var(--accent-2); color: #082e26; width: 100%; }
.btn-ghost { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); }
.btn-small { padding: .5rem .8rem; font-size: .82rem; }
.btn-text { color: var(--text-dim); font-size: .82rem; font-weight: 600; text-decoration: underline; text-align: center; width: 100%; }

.privacy-badge { font-size: .82rem; color: var(--ok); }
.limits-note { font-size: .78rem; color: var(--text-dim); }

/* =============================================================
   7. Ad slots
   ============================================================= */
.ad-slot {
  min-height: 90px; border: 1px dashed var(--border); border-radius: 10px;
  display: flex; align-items: center; justify-content: center; margin: 1.5rem auto;
  background: var(--panel);
}
.ad-banner { min-height: 90px; }
.ad-incontent { min-height: 250px; max-width: 728px; }
.ad-label { font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; color: var(--text-dim); }

.corner-toast {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 500;
  background: var(--panel); border: 1px dashed var(--border); border-radius: 10px;
  padding: .9rem 2.2rem .9rem 1rem; min-width: 180px; min-height: 60px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
.corner-toast-close {
  position: absolute; top: .3rem; right: .5rem; font-size: 1.1rem; color: var(--text-dim); line-height: 1;
}

.download-dialog {
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); color: var(--text);
  padding: 1.25rem; max-width: 420px; width: 90vw;
  position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); margin: 0;
}
.download-dialog::backdrop { background: rgba(0,0,0,.6); }
.download-dialog .ad-popup { min-height: 200px; margin-bottom: 1rem; }

/* =============================================================
   8. Content sections
   ============================================================= */
section.container { padding: 2.5rem var(--gutter); }
.how-it-works h2, .use-cases h2, .faq h2, .seo-copy h2 { font-size: clamp(1.3rem, 3vw, 1.7rem); margin-bottom: 1.25rem; text-align: center; }

.steps-grid, .cases-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
.step-card, .case-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem;
}
.step-card h3 { font-size: 1rem; margin-bottom: .4rem; color: var(--accent-2); }
.step-card p, .case-card p { color: var(--text-dim); font-size: .9rem; }
.case-card { display: flex; gap: .8rem; align-items: flex-start; }
.case-icon { font-size: 1.6rem; }
.case-card h3 { font-size: .98rem; margin-bottom: .3rem; }

.seo-copy { max-width: 760px; margin: 0 auto; }
.seo-copy p { margin-bottom: 1rem; color: var(--text-dim); }
.seo-copy strong { color: var(--text); }

.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: .6rem; }
.faq-item { border: 1px solid var(--border); border-radius: 10px; padding: .2rem .9rem; background: var(--panel); }
.faq-item summary { padding: .8rem 0; font-weight: 700; cursor: pointer; font-size: .95rem; }
.faq-item p { padding-bottom: .9rem; color: var(--text-dim); font-size: .9rem; }

/* =============================================================
   9. Responsive
   ============================================================= */
@media (min-width: 720px) {
  .tool-grid { grid-template-columns: 1.1fr 1fr; }
  .tool-preview { order: 0; }
  .steps-grid { grid-template-columns: repeat(3, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
  .container { padding: 0 2rem; }
}

/* =============================================================
   10. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}