/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-light: #dbeafe;
  --ink: #0f172a;
  --ink-soft: #475569;
  --ink-faint: #94a3b8;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-soft-2: #f1f5f9;
  --border: #e2e8f0;
  --success: #16a34a;
  --warn: #b45309;
  --warn-bg: #fef3c7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px -8px rgba(15, 23, 42, .16);
  --shadow-lg: 0 4px 8px rgba(15, 23, 42, .08), 0 24px 48px -12px rgba(15, 23, 42, .22);
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --display: "Manrope", var(--sans);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  overflow-x: clip;
  scroll-behavior: smooth;
}
@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(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
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; }
input, select, textarea { font: inherit; color: inherit; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; font-family: var(--display); font-weight: 800; letter-spacing: -0.02em; }
ul { padding-left: 1.15em; }
li { margin-bottom: .35em; }
::selection { background: var(--accent-light); color: var(--accent-dark); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* =============================================================
   3. Utilities
   ============================================================= */
.container { width: 100%; max-width: 1140px; margin-inline: auto; padding-inline: 1.25rem; }
.skip-link {
  position: fixed; top: -100px; left: 1rem; padding: .6rem 1rem;
  background: var(--ink); color: #fff; z-index: 9999; border-radius: 8px; font-weight: 600;
  transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* =============================================================
   4. Buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  padding: .7rem 1.15rem; border-radius: var(--radius-sm); font-weight: 700; font-size: .95rem;
  transition: transform .15s var(--ease-out), background .15s var(--ease-out), box-shadow .15s var(--ease-out), border-color .15s var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 2px 8px -2px rgba(37,99,235,.55); }
.btn-primary:hover { background: var(--accent-dark); }
.btn-outline { background: #fff; color: var(--accent); border: 1.5px solid var(--accent); }
.btn-outline:hover { background: var(--accent-light); }
.btn-secondary { background: var(--bg-soft-2); color: var(--ink); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-ghost { background: transparent; color: var(--ink-soft); }
.btn-ghost:hover { color: var(--ink); }
.btn-sm { padding: .5rem .85rem; font-size: .85rem; }
.btn-lg { padding: .85rem 1.3rem; font-size: 1rem; flex: 1 1 auto; }
.btn-block { display: flex; width: 100%; margin-top: 1rem; }

/* =============================================================
   5. Header
   ============================================================= */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255,255,255,.9); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .8rem; }
.logo { display: flex; align-items: center; gap: .5rem; font-family: var(--display); font-weight: 800; font-size: 1.15rem; color: var(--ink); }
.main-nav { display: none; gap: 1.5rem; }
.main-nav a { font-weight: 600; font-size: .92rem; color: var(--ink-soft); transition: color .15s; }
.main-nav a:hover { color: var(--accent); }
@media (min-width: 720px) { .main-nav { display: flex; } }

/* =============================================================
   6. Hero + Tool card
   ============================================================= */
.hero { padding-block: 2.2rem 2rem; }
.hero-head { max-width: 62ch; margin-bottom: 1.6rem; }
.hero-head h1 { font-size: clamp(1.85rem, 4.4vw, 2.75rem); margin-bottom: .6rem; }
.hero-sub { font-size: 1.08rem; color: var(--ink-soft); }

.tool-card {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: clamp(1rem, 2.5vw, 1.75rem); box-shadow: var(--shadow);
}
.tool-grid { display: grid; gap: 1.75rem; grid-template-columns: 1fr; }
@media (min-width: 960px) { .tool-grid { grid-template-columns: 1.15fr 1fr; align-items: start; } }

.field-group { margin-bottom: 1.5rem; }
.field-group:last-child { margin-bottom: 0; }
.field-label { display: block; font-weight: 700; font-size: .88rem; margin-bottom: .4rem; color: var(--ink); }
.field-input {
  width: 100%; padding: .65rem .8rem; border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  background: #fff; font-size: .95rem; transition: border-color .15s var(--ease-out);
}
.field-input:focus { border-color: var(--accent); }
.field-hint { font-size: .82rem; color: var(--ink-faint); margin-top: .4rem; }
.field-row { display: grid; grid-template-columns: 1fr; gap: .9rem; margin-bottom: .9rem; }
@media (min-width: 540px) { .field-row { grid-template-columns: 1fr 1fr; } }
.field-col-checkbox { display: flex; align-items: flex-end; padding-bottom: .5rem; }
.field-checkbox { display: flex; align-items: center; gap: .5rem; font-size: .9rem; font-weight: 600; }
.field-checkbox input { width: 1.1rem; height: 1.1rem; accent-color: var(--accent); }
.field-color { width: 100%; height: 2.6rem; padding: .2rem; border: 1.5px solid var(--border); border-radius: var(--radius-sm); background: #fff; cursor: pointer; }
.field-help { margin-top: .5rem; font-size: .85rem; }
.field-help summary { cursor: pointer; color: var(--accent); font-weight: 600; }
.field-help p { margin-top: .4rem; color: var(--ink-soft); }

.mode-tabs { display: flex; gap: .5rem; flex-wrap: wrap; }
.mode-tab {
  padding: .5rem .85rem; border-radius: 999px; border: 1.5px solid var(--border); background: #fff;
  font-size: .85rem; font-weight: 700; color: var(--ink-soft); transition: all .15s var(--ease-out);
}
.mode-tab:hover { border-color: var(--accent); color: var(--accent); }
.mode-tab.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }

.mode-panel[hidden] { display: none; }

.design-title { font-size: 1.05rem; margin-bottom: .9rem; }

.style-grid, .panel-3d-controls .style-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .55rem; margin-bottom: 1.1rem; }
.style-opt {
  padding: .6rem .5rem; border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  background: #fff; font-size: .85rem; font-weight: 700; text-align: center; transition: all .15s var(--ease-out);
}
.style-opt:hover { border-color: var(--accent); }
.style-opt.is-active { border-color: var(--accent); background: var(--accent-light); color: var(--accent-dark); }

.emoji-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: .4rem; margin-bottom: .7rem; max-width: 320px; }
.emoji-opt {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center; font-size: 1.25rem;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm); background: #fff; transition: all .15s var(--ease-out);
}
.emoji-opt:hover { border-color: var(--accent); }
.emoji-opt.is-active { border-color: var(--accent); background: var(--accent-light); }
.logo-upload-row { display: flex; align-items: center; gap: .7rem; flex-wrap: wrap; }
.center-file-name { font-size: .82rem; color: var(--ink-faint); }

.tool-preview { display: flex; flex-direction: column; align-items: center; gap: .9rem; }
.qr-preview-box {
  width: 100%; max-width: 340px; aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  background: #fff; border: 1.5px dashed var(--border); border-radius: var(--radius); padding: 1rem;
}
.qr-preview-box canvas, .qr-preview-box svg { max-width: 100%; max-height: 100%; }
.qr-actions { display: flex; gap: .6rem; width: 100%; max-width: 340px; flex-wrap: wrap; }
.privacy-badge { font-size: .85rem; color: var(--success); font-weight: 600; text-align: center; }
.limits-note { font-size: .8rem; color: var(--ink-faint); text-align: center; margin-top: -.5rem; }

/* Panel 3D */
.panel-3d { margin-top: 1.75rem; padding-top: 1.75rem; border-top: 1.5px dashed var(--border); }
.panel-3d[hidden] { display: none; }
.panel-3d-sub { color: var(--ink-soft); font-size: .95rem; margin-bottom: 1.2rem; max-width: 68ch; }
.panel-3d-grid { display: grid; grid-template-columns: 1fr; gap: 1.6rem; }
@media (min-width: 960px) { .panel-3d-grid { grid-template-columns: 1fr 1.1fr; } }
.viewer-3d {
  width: 100%; aspect-ratio: 4/3; border-radius: var(--radius); background: linear-gradient(180deg, #f8fafc, #eef2f7);
  border: 1px solid var(--border); position: relative; overflow: hidden; touch-action: none;
}
.viewer-3d canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; display: block; }
.viewer-3d-msg {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 1rem; color: var(--ink-faint); font-size: .9rem;
}
.viewer-3d[data-state="ready"] .viewer-3d-msg { display: none; }
.viewer-3d-hint { font-size: .8rem; color: var(--ink-faint); text-align: center; margin-top: .4rem; }
.print-warnings { display: flex; flex-direction: column; gap: .5rem; margin-top: .9rem; }
.print-warning {
  font-size: .82rem; font-weight: 600; padding: .55rem .75rem; border-radius: var(--radius-sm);
  background: var(--warn-bg); color: var(--warn); border: 1px solid #fde68a;
}
.print-warning.is-danger { background: var(--danger-bg); color: var(--danger); border-color: #fecaca; }
.print-warning.is-ok { background: #dcfce7; color: var(--success); border-color: #bbf7d0; }

/* =============================================================
   7. Sections generic
   ============================================================= */
.section { padding-block: 3.2rem; }
.section-alt { background: var(--bg-soft); }
.section-title { font-size: clamp(1.5rem, 3.2vw, 2.1rem); margin-bottom: .5rem; }
.section-sub { color: var(--ink-soft); max-width: 62ch; margin-bottom: 2rem; }
.section-copy { color: var(--ink-soft); max-width: 78ch; margin-bottom: 1.1rem; font-size: 1rem; }
.section-copy:last-child { margin-bottom: 0; }

/* Plantillas */
.templates-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 640px) { .templates-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .templates-grid { grid-template-columns: repeat(3, 1fr); } }
.template-card {
  text-align: left; padding: 1.3rem; background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out), border-color .18s var(--ease-out);
}
.template-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--accent); }
.template-icon { font-size: 1.6rem; display: block; margin-bottom: .6rem; }
.template-card h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.template-card p { font-size: .88rem; color: var(--ink-soft); }

/* Cómo funciona */
.steps-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 720px) { .steps-grid { grid-template-columns: repeat(3, 1fr); } }
.step-card { text-align: left; }
.step-num {
  display: inline-flex; align-items: center; justify-content: center; width: 2.6rem; height: 2.6rem;
  border-radius: 50%; background: var(--accent); color: #fff; font-family: var(--display); font-weight: 800;
  font-size: 1.15rem; margin-bottom: .9rem;
}
.step-card h3 { font-size: 1.1rem; margin-bottom: .4rem; }
.step-card p { color: var(--ink-soft); font-size: .95rem; }

/* Ideas por negocio */
.ideas-grid { display: grid; grid-template-columns: 1fr; gap: 1.3rem; }
@media (min-width: 640px) { .ideas-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1280px) { .ideas-grid { grid-template-columns: repeat(3, 1fr); } }
.idea-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; }
.idea-icon { font-size: 1.5rem; display: block; margin-bottom: .5rem; }
.idea-card h3 { font-size: 1.05rem; margin-bottom: .6rem; }
.idea-card ul { font-size: .9rem; color: var(--ink-soft); }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: .7rem; max-width: 78ch; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .95rem 1.1rem; }
.faq-item summary { cursor: pointer; font-weight: 700; font-size: .98rem; list-style: none; display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--accent); flex-shrink: 0; transition: transform .2s var(--ease-out); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { margin-top: .7rem; color: var(--ink-soft); font-size: .92rem; }

/* =============================================================
   8. Ad slots (placeholders — nunca scripts reales)
   ============================================================= */
.ad-slot {
  display: flex; align-items: center; justify-content: center;
  background: repeating-linear-gradient(45deg, #f1f5f9, #f1f5f9 10px, #e8edf3 10px, #e8edf3 20px);
  border: 1.5px dashed var(--ink-faint); border-radius: var(--radius-sm); color: var(--ink-faint);
}
.ad-label { font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.ad-leaderboard { min-height: 90px; margin-top: 1.4rem; }
.ad-incontent { min-height: 250px; margin-block: 1rem; }
.ad-popup { min-height: 200px; width: 100%; margin-block: 1rem; }
.ad-corner-slot { min-height: 90px; width: 100%; }

.ad-dialog {
  border: none; border-radius: var(--radius-lg); padding: 1.3rem; box-shadow: var(--shadow-lg);
  width: min(360px, 90vw); position: fixed; inset: 0; margin: auto;
}
.ad-dialog::backdrop { background: rgba(15, 23, 42, .55); }
.ad-dialog-close {
  position: absolute; top: .6rem; right: .6rem; width: 2rem; height: 2rem; border-radius: 50%;
  background: var(--bg-soft-2); font-size: 1.2rem; line-height: 1; display: flex; align-items: center; justify-content: center;
}
.ad-dialog-close:hover { background: var(--border); }
.ad-dialog-continue { display: flex; width: 100%; justify-content: center; margin-top: .3rem; }

.ad-corner {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 45; width: min(280px, calc(100vw - 2rem));
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: .7rem; animation: adCornerIn .35s var(--ease-out);
}
@keyframes adCornerIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.ad-corner[hidden] { display: none; }
.ad-corner-close {
  position: absolute; top: -.5rem; right: -.5rem; width: 1.6rem; height: 1.6rem; border-radius: 50%;
  background: var(--ink); color: #fff; font-size: 1rem; line-height: 1; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow);
}

/* =============================================================
   9. Footer
   ============================================================= */
.site-footer { border-top: 1px solid var(--border); padding-block: 2rem; background: var(--bg-soft); }
.footer-row { display: flex; flex-direction: column; align-items: center; gap: 1rem; text-align: center; }
@media (min-width: 720px) { .footer-row { flex-direction: row; justify-content: space-between; text-align: left; } }
.footer-brand { display: flex; align-items: center; gap: .5rem; font-weight: 800; font-family: var(--display); }
.footer-links { display: flex; gap: 1.2rem; }
.footer-links a { font-size: .88rem; color: var(--ink-soft); }
.footer-links a:hover { color: var(--accent); }
.footer-copy { font-size: .82rem; color: var(--ink-faint); }

/* =============================================================
   10. Legal pages
   ============================================================= */
.legal-page { max-width: 74ch; margin-inline: auto; padding-block: 3rem; }
.legal-page h1 { font-size: 1.9rem; margin-bottom: 1.2rem; }
.legal-page h2 { font-size: 1.2rem; margin-block: 1.6rem .5rem; }
.legal-page p, .legal-page li { color: var(--ink-soft); }
.legal-page ul { margin-bottom: 1rem; }

/* =============================================================
   11. Reduced-motion — solo lo intrusivo
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .ad-corner { animation: none; }
}