:root {
  --primary: #4f46e5; --primary-dark: #4338ca; --primary-soft: rgba(79, 70, 229, .12);
  --accent: #0d9488; --danger: #dc2626; --warn-bg: #fffbeb; --warn-bd: #fcd34d; --warn-tx: #92400e;
  --bg: #f6f7fb; --surface: #fff; --text: #111827; --muted: #6b7280; --border: #e5e7eb;
  --radius: 14px; --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--text); background: var(--bg); min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }
img, svg, canvas { max-width: 100%; }
a { color: var(--primary); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.015em; }
h1 { font-size: clamp(1.6rem, 4vw, 2.1rem); }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }
.ellipsis { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.offscreen { position: fixed; left: -9999px; top: 0; }
.container { width: 100%; max-width: 1120px; margin: 0 auto; padding-inline: 20px; }
.container.narrow { max-width: 760px; }
.skip { position: absolute; left: -999px; } .skip:focus { left: 8px; top: 8px; z-index: 99; background: #fff; padding: 8px 12px; border-radius: 8px; }
:focus-visible { outline: 3px solid var(--primary-soft); outline-offset: 2px; box-shadow: 0 0 0 2px var(--primary); }

/* Cabecera y pie */
.site-header { background: rgba(255, 255, 255, .9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 20; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--text); text-decoration: none; font-size: 1.1rem; }
.brand-mark { width: 34px; height: 34px; padding: 4px; border-radius: 9px; background: var(--primary); color: #fff; }
.nav { display: flex; align-items: center; gap: 10px; }
.nav-link { color: var(--text); text-decoration: none; font-weight: 600; padding: 6px 8px; }
.site-footer { border-top: 1px solid var(--border); background: var(--surface); margin-top: 48px; padding: 22px 0; font-size: .9rem; color: var(--muted); }
.foot { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; align-items: center; }
.foot p { margin: 0; }
.foot nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.foot a { color: var(--muted); }

/* Botones */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid transparent; border-radius: 10px; padding: 10px 18px; font: inherit; font-weight: 650; text-decoration: none; cursor: pointer; transition: background .15s, border-color .15s, transform .05s; line-height: 1.2; }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn[hidden] { display: none; }
.btn-primary { background: var(--primary); color: #fff; } .btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--primary-soft); color: var(--primary-dark); } .btn-secondary:hover { background: rgba(79, 70, 229, .2); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); } .btn-ghost:hover { background: #f3f4f6; }
.btn-danger { background: transparent; color: var(--danger); border-color: #fecaca; } .btn-danger:hover { background: #fef2f2; }
.btn-light { background: #fff; color: var(--primary-dark); } .btn-light:hover { background: #eef2ff; }
.btn-sm { padding: 7px 12px; font-size: .88rem; border-radius: 9px; }
.btn-lg { padding: 14px 24px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* Tarjetas y formularios */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.page { padding-top: 28px; }
.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.page-head h1 { margin: 0; } .page-head p { margin: 4px 0 0; }
.back { display: inline-block; margin-bottom: 8px; text-decoration: none; color: var(--muted); font-weight: 600; }
.field { display: block; margin-bottom: 16px; }
.field > span { display: block; font-weight: 650; font-size: .92rem; margin-bottom: 6px; }
input[type=text], input[type=email], input[type=password], input[type=url], select { width: 100%; font: inherit; padding: 11px 13px; border: 1px solid #d1d5db; border-radius: 10px; background: #fff; color: var(--text); }
input:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
input[type=file] { width: 100%; font: inherit; font-size: .9rem; }
input[type=range] { width: 100%; accent-color: var(--primary); }
input[type=color] { width: 56px; height: 44px; padding: 3px; border: 1px solid #d1d5db; border-radius: 10px; background: #fff; cursor: pointer; }
.hint { display: block; color: var(--muted); font-size: .84rem; margin-top: 6px; }
.fs { border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px 16px; margin: 0 0 16px; min-width: 0; }
.fs legend { font-weight: 700; padding: 0 6px; font-size: .92rem; }
.colors { display: flex; gap: 20px; flex-wrap: wrap; }
.color { display: flex; flex-direction: column; gap: 6px; font-size: .85rem; font-weight: 600; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.switch { display: flex; align-items: center; gap: 10px; font-weight: 650; cursor: pointer; }
.switch input { width: 20px; height: 20px; accent-color: var(--primary); }
.form-error { color: #b91c1c; background: #fef2f2; border: 1px solid #fecaca; border-radius: 10px; padding: 10px 12px; font-size: .92rem; }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.notice { border-radius: 10px; padding: 10px 12px; font-size: .88rem; margin: 10px 0 0; }
.notice-warn { background: var(--warn-bg); border: 1px solid var(--warn-bd); color: var(--warn-tx); }
.auth-wrap { padding-top: 48px; }
.auth-card { max-width: 440px; margin: 0 auto; }
.auth-card h1 { margin-bottom: 4px; }

/* Landing */
.hero { background: radial-gradient(1200px 400px at 80% -10%, rgba(79, 70, 229, .18), transparent), linear-gradient(180deg, #fff, var(--bg)); padding: 56px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; }
.pill { display: inline-block; background: var(--primary-soft); color: var(--primary-dark); font-weight: 700; font-size: .82rem; padding: 5px 12px; border-radius: 99px; margin-bottom: 14px; }
.hero h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); }
.lead { font-size: 1.12rem; color: #374151; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.hero-art { display: flex; justify-content: center; }
.mock { width: 100%; max-width: 330px; background: #fff; border-radius: 22px; padding: 22px; box-shadow: 0 24px 60px rgba(79, 70, 229, .22); border: 1px solid var(--border); transform: rotate(2deg); }
.mock-qr svg { width: 100%; display: block; border-radius: 12px; border: 1px solid var(--border); }
.mock-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.mock-stats b { display: block; font-size: 1.3rem; } .mock-stats span { color: var(--muted); font-size: .8rem; }
.spark { grid-column: 1 / -1; width: 100%; height: 40px; }
.section { padding: 48px 0; }
.section.alt { background: #fff; border-block: 1px solid var(--border); }
.section-title { text-align: center; font-size: clamp(1.5rem, 3.5vw, 1.9rem); }
.section-sub { text-align: center; color: var(--muted); max-width: 560px; margin: 0 auto 28px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature p { color: #4b5563; margin: 0; }
.steps { list-style: none; margin: 28px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.steps li { display: flex; gap: 12px; }
.steps h3 { margin-bottom: 4px; } .steps p { color: #4b5563; margin: 0; font-size: .95rem; }
.step-n { flex: none; width: 36px; height: 36px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 800; display: grid; place-items: center; }
.faq { max-width: 760px; margin: 24px auto 0; display: grid; gap: 10px; }
.faq details { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq p { margin: 10px 0 0; color: #4b5563; }
.cta-band { background: linear-gradient(135deg, var(--primary), #7c3aed); color: #fff; text-align: center; padding: 48px 0; margin-top: 24px; }
.cta-band h2 { font-size: 1.6rem; } .cta-band p { opacity: .9; }
.prose { padding-top: 40px; } .prose h2 { margin-top: 1.6em; } .prose ul { padding-left: 1.2em; } .prose li { margin-bottom: .4em; }
.notfound { padding: 72px 20px; } .nf-emoji { font-size: 3rem; }

/* Anuncios */
.ad-slot { margin: 28px auto; max-width: 970px; padding: 10px 12px 14px; border: 1px dashed var(--border); border-radius: 12px; background: rgba(255, 255, 255, .6); min-height: 120px; overflow: hidden; }
.ad-slot[hidden] { display: none; }
.ad-label { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); text-align: center; margin-bottom: 6px; }
.ad-slot ins.adsbygoogle { display: block; min-height: 90px; }
.ad-in-grid { grid-column: 1 / -1; width: 100%; margin: 4px 0; }

/* Panel */
.qr-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 18px; }
.qr-card { display: flex; flex-direction: column; gap: 14px; }
.qr-card.is-off { opacity: .75; }
.qr-top { display: flex; gap: 14px; min-width: 0; }
.thumb { flex: none; width: 96px; height: 96px; border-radius: 10px; overflow: hidden; border: 1px solid var(--border); background: #fff; display: grid; place-items: center; }
.thumb canvas { width: 100% !important; height: 100% !important; display: block; }
.thumb-lg { width: 104px; height: 104px; }
.qr-meta { min-width: 0; flex: 1; } .qr-meta h3 { margin-bottom: 2px; } .qr-meta p { margin: 2px 0 0; }
.badge { display: inline-block; font-size: .72rem; font-weight: 700; padding: 2px 9px; border-radius: 99px; }
.badge-on { background: #dcfce7; color: #166534; } .badge-off { background: #f3f4f6; color: #4b5563; }
.qr-nums { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.qr-nums div { background: #f9fafb; border-radius: 10px; padding: 10px 12px; }
.qr-nums b { display: block; font-size: 1.4rem; line-height: 1.2; } .qr-nums span { color: var(--muted); font-size: .82rem; }
.qr-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.empty { text-align: center; padding: 48px 20px; }

/* Editor */
.editor-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 22px; align-items: start; }
.preview-card { position: sticky; top: 80px; text-align: center; }
.preview { display: grid; place-items: center; margin: 8px auto 14px; max-width: 320px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: #fff; }
.preview canvas { width: 100% !important; height: auto !important; display: block; }
.short-box { display: flex; gap: 8px; align-items: center; justify-content: center; flex-wrap: wrap; background: #f9fafb; border-radius: 10px; padding: 8px 10px; }
.short-box code { overflow-wrap: anywhere; }
.dl-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }

/* Estadísticas */
.stats-head { display: flex; gap: 18px; align-items: center; margin-bottom: 18px; flex-wrap: wrap; }
.stats-info { flex: 1; min-width: 200px; } .stats-info h1 { margin-bottom: 4px; } .stats-info p { margin: 2px 0 0; }
.stats-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.cards4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); }
.stat span { display: block; color: var(--muted); font-size: .85rem; font-weight: 600; }
.stat b { display: block; font-size: 2rem; line-height: 1.2; letter-spacing: -.02em; }
.stat small { color: var(--muted); font-size: .78rem; }
.chart-card { margin-bottom: 4px; }
.chart-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.chart-head h2 { margin: 0; }
.chart-box { position: relative; height: 320px; }
.seg { display: inline-flex; background: #f3f4f6; border-radius: 10px; padding: 3px; }
.seg button { border: 0; background: transparent; font: inherit; font-weight: 650; font-size: .88rem; padding: 6px 14px; border-radius: 8px; cursor: pointer; color: var(--muted); }
.seg button.on { background: #fff; color: var(--primary-dark); box-shadow: 0 1px 3px rgba(0, 0, 0, .12); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: .93rem; }
.table th, .table td { padding: 9px 8px; border-bottom: 1px solid var(--border); text-align: left; }
.table th { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.flag { font-size: 1.1em; }

/* Avisos emergentes */
.toasts { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); display: grid; gap: 8px; z-index: 100; width: max-content; max-width: calc(100vw - 32px); }
.toast { background: #111827; color: #fff; padding: 10px 16px; border-radius: 10px; box-shadow: var(--shadow); font-size: .92rem; transition: opacity .4s; }
.toast-error { background: #b91c1c; } .toast.out { opacity: 0; }

@media (max-width: 900px) {
  .hero-grid, .editor-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; } .mock { max-width: 260px; }
  .preview-card { position: static; }
  .grid3 { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .cards4 { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .container { padding-inline: 14px; }
  .grid3, .steps, .row2 { grid-template-columns: 1fr; }
  .qr-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 28px; }
  .chart-box { height: 260px; }
  .stat b { font-size: 1.6rem; }
  .brand span { max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .foot { flex-direction: column; align-items: flex-start; }
}

/* Demo pública del generador (landing) */
.demo-upsell { background: #eef2ff; border: 1px solid #c7d2fe; color: #312e81; margin-top: 16px; text-align: left; }
.demo-upsell .cta-row { margin-top: 10px; }
.demo-main { text-align: center; margin: 4px 0 16px; }
.demo-main .btn { width: 100%; }
#demo-dl { border-top: 1px solid var(--border); margin-top: 14px; padding-top: 4px; }