/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --ink: #1b1b22;
  --ink-soft: #4a4a55;
  --cream: #f7f6f2;
  --paper: #ffffff;
  --line: #e4e1d8;
  --accent: #d98c1f;
  --accent-ink: #1b1b22;
  --accent-soft: #fbe7c8;
  --ok: #1b7a43;
  --warn: #b3760d;
  --bad: #b3261e;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(27,27,34,.06), 0 8px 24px rgba(27,27,34,.06);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --sans: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f1efe8;
    --ink-soft: #c7c4ba;
    --cream: #17161a;
    --paper: #201f24;
    --line: #38373d;
    --accent-soft: #3a2c12;
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { 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: -0.01em; font-weight: 800; }
::selection { background: var(--accent-soft); color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

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

/* =============================================================
   3. Utilities
   ============================================================= */
.container { width: 100%; max-width: 1180px; margin-inline: auto; padding-inline: 1.25rem; }
.container--prose { max-width: 760px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* =============================================================
   4. Typography
   ============================================================= */
h1 { font-size: clamp(1.7rem, 4.4vw, 2.7rem); max-width: 20ch; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 1.4rem; }
h3 { font-size: 1.05rem; margin-bottom: .4rem; }

/* =============================================================
   5. Components
   ============================================================= */
.btn-primary, .btn-secondary, .btn-text, .btn-inline {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  border-radius: var(--radius-sm);
  transition: transform .15s var(--ease-out), background .15s var(--ease-out), opacity .15s var(--ease-out);
  font-weight: 600;
}
.btn-primary {
  background: var(--ink); color: var(--cream);
  padding: .85rem 1.3rem; font-size: .98rem; flex: 1 1 auto;
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-primary:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.btn-secondary {
  background: var(--paper); color: var(--ink); border: 1.5px solid var(--line);
  padding: .8rem 1.2rem; font-size: .95rem; flex: 1 1 auto;
}
.btn-secondary:hover { border-color: var(--accent); }
.btn-secondary:disabled { opacity: .45; cursor: not-allowed; }
.btn-text { color: var(--ink-soft); text-decoration: underline; font-size: .9rem; padding: .3rem; }
.btn-inline {
  width: 2.2rem; height: 2.2rem; border-radius: 50%;
  background: var(--paper); border: 1.5px solid var(--line); font-size: 1rem; flex: 0 0 auto;
}
.btn-inline:hover { border-color: var(--accent); }
.btn-file { position: relative; }

.field-label { display: block; font-size: .85rem; font-weight: 600; color: var(--ink-soft); margin: .9rem 0 .35rem; }
.field-label--inline { display: inline; margin: 0; }
.field-hint { font-weight: 400; color: var(--ink-soft); opacity: .8; }
.field-input, .field-select {
  width: 100%; padding: .75rem .9rem; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  background: var(--paper); color: var(--ink); font-size: .95rem;
  transition: border-color .15s var(--ease-out);
}
.field-input:focus, .field-select:focus { border-color: var(--accent); }
.field-row { display: flex; align-items: center; gap: .6rem; margin-top: .7rem; }
.field-row .field-select { width: auto; flex: 1 1 auto; }
.input-with-btn { display: flex; gap: .5rem; align-items: center; }
.input-with-btn .field-input { flex: 1 1 auto; }

/* =============================================================
   6. Sections — header / footer
   ============================================================= */
.site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding-block: .9rem; gap: 1rem; }
.logo { display: flex; align-items: center; gap: .5rem; font-weight: 800; font-size: 1.15rem; }
.logo-mark { color: var(--accent); font-size: 1.3rem; }
.header-tag { font-size: .85rem; color: var(--ink-soft); display: none; }
@media (min-width: 540px) { .header-tag { display: block; } }

.site-footer { border-top: 1px solid var(--line); padding-block: 1.6rem; margin-top: 2rem; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between; font-size: .88rem; color: var(--ink-soft); }
.footer-nav { display: flex; gap: 1.2rem; }
.footer-nav a:hover { color: var(--accent); }

/* =============================================================
   7. Tool section
   ============================================================= */
.tool-section { padding-block: 2.2rem 1.5rem; }
.tool-subtitle { color: var(--ink-soft); max-width: 60ch; margin-top: .6rem; font-size: 1.02rem; }
.noscript-msg { background: var(--accent-soft); padding: 1rem; border-radius: var(--radius-sm); margin: 1rem 0; }

.tool-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.3rem; margin-top: 1.4rem;
}
.tool-grid { display: grid; gap: 1.6rem; grid-template-columns: 1fr; }
@media (min-width: 960px) { .tool-grid { grid-template-columns: minmax(0,1fr) minmax(0,1.1fr); } }

.field-group { padding-top: 1rem; border-top: 1px dashed var(--line); }
.field-group:first-child { padding-top: 0; border-top: none; }

.mode-tabs { display: flex; gap: .5rem; }
.mode-tab {
  flex: 1 1 auto; padding: .7rem .5rem; text-align: center; border-radius: var(--radius-sm);
  background: var(--cream); border: 1.5px solid var(--line); font-weight: 600; font-size: .92rem;
  transition: background .15s var(--ease-out), border-color .15s var(--ease-out);
}
.mode-tab.is-active { background: var(--ink); color: var(--cream); border-color: var(--ink); }
.mode-panel.is-hidden, .mode-panel[hidden] { display: none; }

.style-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; }
.style-btn {
  display: flex; flex-direction: column; align-items: center; gap: .35rem;
  padding: .6rem .3rem; border-radius: var(--radius-sm); border: 1.5px solid var(--line);
  background: var(--cream); font-size: .78rem; font-weight: 600; color: var(--ink-soft);
  transition: border-color .15s var(--ease-out), background .15s var(--ease-out);
}
.style-btn.is-active { border-color: var(--accent); background: var(--accent-soft); color: var(--ink); }
.style-icon { width: 26px; height: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 3px; }
.style-icon::before, .style-icon::after { content: ""; background: var(--ink-soft); }
.style-icon--clasico::before, .style-icon--clasico::after { border-radius: 1px; }
.style-icon--redondeado::before, .style-icon--redondeado::after { border-radius: 6px; }
.style-icon--puntos::before, .style-icon--puntos::after { border-radius: 50%; }
.style-icon--elegante::before { border-radius: 6px 0 6px 0; }
.style-icon--elegante::after { border-radius: 0 6px 0 6px; }
.style-btn.is-active .style-icon::before, .style-btn.is-active .style-icon::after { background: var(--accent); }

.color-row { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.color-field { display: flex; align-items: center; gap: .5rem; font-size: .85rem; font-weight: 600; flex: 1 1 auto; min-width: 0; }
.color-field input[type="color"] { width: 2.4rem; height: 2.4rem; border: 1.5px solid var(--line); border-radius: 50%; padding: 0; overflow: hidden; flex: 0 0 auto; background: none; }
.color-field input[type="color"]::-webkit-color-swatch-wrapper { padding: 2px; }
.color-field input[type="color"]::-webkit-color-swatch { border-radius: 50%; border: none; }
.hex-input { width: 5.6rem; padding: .4rem .5rem; border: 1.5px solid var(--line); border-radius: var(--radius-sm); font-family: var(--mono); font-size: .78rem; min-width: 0; }
.color-presets { display: flex; gap: .5rem; margin-top: .7rem; flex-wrap: wrap; }
.preset-swatch {
  width: 2rem; height: 2rem; border-radius: 50%; border: 1.5px solid var(--line);
  background: linear-gradient(135deg, var(--sw-bg) 50%, var(--sw-fg) 50%);
}
.preset-swatch:hover { border-color: var(--accent); }

.emoji-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: .4rem; }
.emoji-btn {
  aspect-ratio: 1; font-size: 1.25rem; border-radius: var(--radius-sm); border: 1.5px solid var(--line);
  background: var(--cream); display: flex; align-items: center; justify-content: center;
}
.emoji-btn.is-active { border-color: var(--accent); background: var(--accent-soft); }
.center-upload { display: flex; align-items: center; gap: .7rem; margin-top: .7rem; flex-wrap: wrap; }
.center-preview { display: inline-flex; align-items: center; gap: .4rem; font-size: .85rem; color: var(--ink-soft); }
.center-preview img { width: 1.6rem; height: 1.6rem; border-radius: 4px; object-fit: contain; background: var(--cream); }

.privacy-badge { margin-top: 1.3rem; font-size: .85rem; color: var(--ok); font-weight: 600; }
.limits-note { font-size: .8rem; color: var(--ink-soft); margin-top: .4rem; }

.preview-block { padding-top: 1rem; border-top: 1px dashed var(--line); }
.preview-block:first-child { padding-top: 0; border-top: none; }
.preview-label { font-size: .85rem; font-weight: 700; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .04em; margin-bottom: .6rem; }

.qr-canvas-holder {
  aspect-ratio: 1; width: 100%; max-width: 280px; margin-inline: auto;
  display: flex; align-items: center; justify-content: center;
  background: var(--cream); border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden;
}
.qr-canvas-holder canvas, .qr-canvas-holder img { max-width: 100%; max-height: 100%; }
.qr-empty { font-size: .82rem; color: var(--ink-soft); text-align: center; padding: 1rem; }

.dl-row { display: flex; gap: .6rem; margin-top: .9rem; flex-wrap: wrap; }

.warnings-panel { display: flex; flex-direction: column; gap: .5rem; padding: 1rem 0; }
.warning-item { padding: .6rem .8rem; border-radius: var(--radius-sm); font-size: .85rem; font-weight: 600; display: flex; gap: .5rem; }
.warning-item.is-ok { background: #e8f4ec; color: var(--ok); }
.warning-item.is-warn { background: #fbf1dc; color: var(--warn); }
.warning-item.is-bad { background: #fbe6e4; color: var(--bad); }
@media (prefers-color-scheme: dark) {
  .warning-item.is-ok { background: #16301f; }
  .warning-item.is-warn { background: #332608; }
  .warning-item.is-bad { background: #34140f; }
}

.format-tabs { display: flex; gap: .5rem; flex-wrap: wrap; }
.format-tab {
  flex: 1 1 auto; padding: .65rem .5rem; text-align: center; border-radius: var(--radius-sm);
  background: var(--cream); border: 1.5px solid var(--line); font-weight: 600; font-size: .85rem;
}
.format-tab.is-active { background: var(--ink); color: var(--cream); border-color: var(--ink); }
.format-desc { font-size: .82rem; color: var(--ink-soft); margin: .5rem 0 .3rem; }

.viewer3d-wrap { margin-top: .8rem; }
.viewer3d {
  aspect-ratio: 4/3; width: 100%; background: var(--cream); border: 1px solid var(--line);
  border-radius: var(--radius-sm); position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center; touch-action: none;
}
.viewer3d canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; }
.viewer3d-msg { font-size: .82rem; color: var(--ink-soft); text-align: center; padding: 1rem; max-width: 26ch; }
.viewer3d[data-state="error"] .viewer3d-msg { color: var(--bad); }
.viewer3d-hint { font-size: .76rem; color: var(--ink-soft); margin-top: .4rem; text-align: center; }

/* =============================================================
   8. Ad slots (placeholders only)
   ============================================================= */
.ad-slot {
  display: flex; align-items: center; justify-content: center;
  border: 1px dashed var(--line); border-radius: var(--radius-sm);
  color: var(--ink-soft); font-size: .78rem; font-weight: 700; letter-spacing: .08em;
  background: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0,0,0,.02) 10px, rgba(0,0,0,.02) 20px);
}
.ad-slot--leaderboard { min-height: 90px; margin-top: 1.4rem; }
.ad-slot--incontent { min-height: 250px; margin-block: 2.2rem; }
.ad-slot--popup { min-height: 200px; margin-block: 1rem; }
.ad-slot--corner { min-height: 60px; width: 260px; }

.download-dialog {
  border: none; border-radius: var(--radius); padding: 1.4rem; max-width: 340px; width: calc(100% - 2rem);
  box-shadow: 0 20px 60px rgba(0,0,0,.25); background: var(--paper); color: var(--ink); position: relative;
}
.download-dialog::backdrop { background: rgba(20,18,14,.5); }
.dialog-close { position: absolute; top: .6rem; right: .7rem; font-size: 1.3rem; line-height: 1; width: 2rem; height: 2rem; border-radius: 50%; }
.dialog-close:hover { background: var(--cream); }
.dialog-title { font-weight: 700; margin-bottom: .8rem; padding-right: 1.6rem; }
.dialog-continue { width: 100%; }

.corner-toast {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 500;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm);
  box-shadow: var(--shadow); padding: .6rem; max-width: 90vw;
}
.toast-close { position: absolute; top: -.5rem; right: -.5rem; width: 1.6rem; height: 1.6rem; border-radius: 50%; background: var(--ink); color: var(--cream); font-size: .95rem; line-height: 1; box-shadow: var(--shadow); }

/* =============================================================
   9. How it works / SEO / uses / FAQ
   ============================================================= */
.how-section, .uses-section, .faq-section { padding-block: 1.6rem; }
.seo-section { padding-block: 1.6rem; }
.seo-section p { color: var(--ink-soft); margin-bottom: 1rem; }
.steps-grid { display: grid; gap: 1.2rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .steps-grid { grid-template-columns: repeat(3, 1fr); } }
.step-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem; }
.step-num {
  display: inline-flex; align-items: center; justify-content: center; width: 2rem; height: 2rem;
  border-radius: 50%; background: var(--accent-soft); color: var(--ink); font-weight: 800; margin-bottom: .7rem;
}
.step-card p { color: var(--ink-soft); font-size: .92rem; }

.uses-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 540px) { .uses-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .uses-grid { grid-template-columns: repeat(3, 1fr); } }
.use-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem; }
.use-emoji { font-size: 1.6rem; display: block; margin-bottom: .5rem; }
.use-card p { color: var(--ink-soft); font-size: .9rem; }

.faq-item { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1rem 1.2rem; margin-bottom: .7rem; }
.faq-item summary { font-weight: 700; cursor: pointer; }
.faq-item summary::marker { color: var(--accent); }
.faq-item p { margin-top: .6rem; color: var(--ink-soft); font-size: .92rem; }

/* =============================================================
   10. Responsive
   ============================================================= */
@media (min-width: 540px) {
  .style-grid { grid-template-columns: repeat(4, 1fr); }
}

/* =============================================================
   11. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .btn-primary:hover { transform: none; }
}