/* ==========================================================================
   1. Tokens
   ========================================================================== */
:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --ink: #1c1f26;
  --ink-soft: #55596a;
  --border: #e3e1da;
  --accent: #1f6f5c;
  --accent-dark: #16584a;
  --accent-soft: #e6f2ee;
  --cream: #fdfcf9;
  --danger: #c94b3f;
  --sans: "Inter", system-ui, sans-serif;
  --display: "Manrope", var(--sans);
  --radius: 14px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card: 0 1px 2px rgba(28,31,38,.04), 0 8px 24px rgba(28,31,38,.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161b;
    --surface: #1c1f26;
    --ink: #f2f1ee;
    --ink-soft: #a7abb8;
    --border: #2c2f38;
    --accent: #45c2a0;
    --accent-dark: #2f9c81;
    --accent-soft: #16332c;
    --cream: #1c1f26;
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
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; }
p { text-wrap: pretty; }
h1, h2, h3 { font-family: var(--display); text-wrap: balance; line-height: 1.15; letter-spacing: -0.02em; color: var(--ink); }
input, select, textarea { font: inherit; color: inherit; }

: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(--cream); color: var(--ink);
  z-index: 9999; border-radius: 8px; font-weight: 600;
  box-shadow: var(--shadow-card);
}
.skip-link:focus { top: 1rem; }

.wrap { max-width: 1180px; margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2rem); }

/* ==========================================================================
   2. Header
   ========================================================================== */
.site-header { padding: 1rem 0; border-bottom: 1px solid var(--border); background: var(--surface); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: .5rem; font-family: var(--display); font-weight: 800; font-size: 1.1rem; }
.logo__dot { color: var(--accent); }
.site-header__nav { display: none; gap: 1.5rem; font-weight: 600; font-size: .92rem; }
@media (min-width: 720px) { .site-header__nav { display: flex; } }
.site-header__nav a { color: var(--ink-soft); transition: color .2s var(--ease-out); }
.site-header__nav a:hover { color: var(--accent); }

/* ==========================================================================
   3. Hero
   ========================================================================== */
.hero { padding: clamp(2rem, 5vw, 3.5rem) clamp(1rem, 4vw, 2rem) 1.5rem; text-align: center; }
.hero h1 { font-size: clamp(1.8rem, 4.5vw, 2.75rem); max-width: 18ch; margin-inline: auto; }
.hero__subtitle { margin-top: .9rem; color: var(--ink-soft); max-width: 52ch; margin-inline: auto; font-size: 1.05rem; }

/* ==========================================================================
   4. Tool card
   ========================================================================== */
.tool-card {
  max-width: 1180px; margin: 0 auto clamp(2rem, 5vw, 3rem); padding: 0 clamp(1rem, 4vw, 2rem);
  display: grid; gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 960px) {
  .tool-card { grid-template-columns: 1.3fr 1fr; align-items: start; }
}

.cobro-form {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: clamp(1.1rem, 3vw, 1.75rem); box-shadow: var(--shadow-card);
  display: flex; flex-direction: column; gap: 1.5rem;
}

.form-grid { display: grid; gap: 1.5rem; }
@media (min-width: 720px) { .form-grid { grid-template-columns: 1fr 1fr; } }

.form-section { border: 1px solid var(--border); border-radius: 10px; padding: 1rem 1rem 1.2rem; display: flex; flex-direction: column; gap: .8rem; }
.form-section legend { font-family: var(--display); font-weight: 700; padding: 0 .3rem; font-size: .98rem; }
.form-section--wide { grid-column: 1 / -1; }

.field { display: flex; flex-direction: column; gap: .35rem; font-size: .88rem; font-weight: 600; color: var(--ink-soft); }
.field input, .field select {
  font-weight: 400; color: var(--ink); background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; padding: .6rem .7rem; font-size: .95rem; width: 100%;
}
.field input:focus, .field select:focus { border-color: var(--accent); background: var(--surface); }
.field-row { display: grid; gap: .8rem; grid-template-columns: 1fr 1fr; }

.checkbox { display: flex; align-items: flex-start; gap: .5rem; font-size: .88rem; color: var(--ink-soft); cursor: pointer; }
.checkbox input { margin-top: .2rem; accent-color: var(--accent); width: 16px; height: 16px; flex-shrink: 0; }

.conceptos-wrap { display: flex; flex-direction: column; gap: .6rem; }
.concepto-row {
  display: grid; gap: .5rem; align-items: center;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .concepto-row { grid-template-columns: 2.2fr .7fr 1fr .9fr auto; }
}
.concepto-row input {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: .55rem .65rem; font-size: .9rem; width: 100%;
}
.concepto-subtotal { font-weight: 700; font-size: .9rem; text-align: right; white-space: nowrap; }
.concepto-del {
  width: 28px; height: 28px; border-radius: 50%; background: var(--bg); color: var(--danger);
  font-size: 1.1rem; line-height: 1; display: flex; align-items: center; justify-content: center;
  justify-self: end;
}
.concepto-del:hover { background: var(--danger); color: #fff; }

.total-row {
  display: flex; justify-content: space-between; align-items: baseline; margin-top: .3rem;
  padding-top: .8rem; border-top: 1px dashed var(--border); font-weight: 600;
}
.total-row strong { font-family: var(--display); font-size: 1.4rem; color: var(--accent-dark); }

.firma-tabs { display: flex; gap: .4rem; margin-bottom: .5rem; }
.firma-tab {
  padding: .4rem .9rem; border-radius: 999px; font-size: .85rem; font-weight: 600;
  background: var(--bg); color: var(--ink-soft); border: 1px solid var(--border);
}
.firma-tab.is-active { background: var(--accent); color: #fff; border-color: var(--accent); }

#firmaCanvas {
  width: 100%; max-width: 500px; height: 160px; background: var(--bg);
  border: 1px dashed var(--border); border-radius: 8px; touch-action: none; cursor: crosshair;
}
.dropzone {
  display: flex; align-items: center; justify-content: center; text-align: center;
  border: 1.5px dashed var(--border); border-radius: 8px; padding: 1.5rem 1rem;
  color: var(--ink-soft); font-size: .88rem; cursor: pointer;
}
.dropzone input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.dropzone:hover { border-color: var(--accent); }

.plantilla-options { display: flex; gap: .6rem; flex-wrap: wrap; }
.plantilla-radio {
  display: flex; align-items: center; gap: .4rem; padding: .5rem .9rem; border-radius: 999px;
  border: 1px solid var(--border); font-size: .88rem; font-weight: 600; cursor: pointer;
}
.plantilla-radio input { accent-color: var(--accent); }
.plantilla-radio:has(input:checked) { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-dark); }

.cta-row { display: flex; flex-direction: column; align-items: center; gap: .6rem; text-align: center; }
.privacy-note { font-size: .82rem; color: var(--ink-soft); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  border-radius: 999px; font-weight: 700; transition: transform .15s var(--ease-out), background .2s var(--ease-out);
}
.btn--primary { background: var(--accent); color: #fff; padding: .9rem 2rem; font-size: 1.05rem; box-shadow: 0 8px 20px rgba(31,111,92,.28); }
.btn--primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn--lg { width: 100%; max-width: 360px; }
.btn--ghost { background: transparent; border: 1px solid var(--border); color: var(--ink-soft); padding: .55rem 1rem; font-size: .88rem; align-self: flex-start; }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--sm { padding: .45rem .9rem; font-size: .85rem; }

/* ==========================================================================
   5. Preview
   ========================================================================== */
.preview-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.2rem; box-shadow: var(--shadow-card); position: sticky; top: 1rem;
}
.preview-title { font-size: .95rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-soft); margin-bottom: .8rem; }
.preview-doc {
  background: #fff; color: #1c1f26; border: 1px solid var(--border); border-radius: 8px;
  padding: 1.2rem; font-size: .82rem; line-height: 1.5; min-height: 420px;
}
.preview-doc[data-plantilla="moderna"] { border-top: 6px solid var(--accent); }
.preview-doc[data-plantilla="minima"] { font-family: "Manrope", sans-serif; }
.preview-doc__header { display: flex; justify-content: space-between; font-weight: 700; margin-bottom: .8rem; font-size: .8rem; }
.preview-doc__title { text-align: center; font-size: 1.05rem; margin: .5rem 0 .8rem; letter-spacing: .04em; }
.preview-doc__fecha, .preview-doc__receptor { margin-bottom: .3rem; color: #444; }
.preview-doc__intro { margin: .8rem 0; }
.preview-doc__tabla { margin: .8rem 0; border-top: 1px solid #ddd; border-bottom: 1px solid #ddd; }
.preview-doc__tabla table { width: 100%; border-collapse: collapse; font-size: .78rem; }
.preview-doc__tabla th, .preview-doc__tabla td { padding: .4rem .3rem; text-align: left; border-bottom: 1px solid #eee; }
.preview-doc__tabla th:last-child, .preview-doc__tabla td:last-child { text-align: right; }
.preview-doc__clausula { font-style: italic; color: #666; margin: .8rem 0; font-size: .76rem; }
.preview-doc__pago { margin-bottom: 1.2rem; }
.preview-doc__firma { text-align: center; margin-top: 1.5rem; font-size: .78rem; }
.preview-doc__firma img { max-height: 60px; margin: 0 auto .3rem; }
.preview-doc__linea { border-top: 1px solid #333; width: 60%; margin: 0 auto .3rem; }

/* ==========================================================================
   6. Ad slots
   ========================================================================== */
.ad-slot {
  display: flex; align-items: center; justify-content: center; min-height: 90px;
  border: 1px dashed var(--border); border-radius: 10px; color: var(--ink-soft);
  font-size: .78rem; font-weight: 700; letter-spacing: .08em; background: repeating-linear-gradient(45deg, var(--surface), var(--surface) 10px, var(--bg) 10px, var(--bg) 20px);
}
.ad-slot--leaderboard { margin: 0 auto 2rem; max-width: 1180px; }
.ad-slot--inline { min-height: 70px; }
.ad-slot--incontent { margin: 2rem auto; }

.corner-ad {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 500;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: var(--shadow-card); padding: .7rem 1rem; display: flex; align-items: center; gap: .6rem;
  max-width: 260px; transform: translateY(20px); opacity: 0; pointer-events: none;
  transition: transform .3s var(--ease-out), opacity .3s var(--ease-out);
}
.corner-ad[data-state="visible"] { transform: translateY(0); opacity: 1; pointer-events: auto; }
.corner-ad__close { font-size: 1.1rem; color: var(--ink-soft); line-height: 1; }
.corner-ad__body { display: flex; flex-direction: column; gap: .1rem; }
.corner-ad__tag { font-size: .68rem; font-weight: 800; color: var(--accent); letter-spacing: .08em; }
.corner-ad__text { font-size: .78rem; color: var(--ink-soft); }

.ad-modal { border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; max-width: 380px; width: 90vw; box-shadow: var(--shadow-card); }
.ad-modal::backdrop { background: rgba(20,22,27,.55); }
.ad-modal__close { position: absolute; top: .8rem; right: .9rem; font-size: 1.3rem; color: var(--ink-soft); }
.ad-modal__slot {
  min-height: 220px; border: 1px dashed var(--border); border-radius: 10px; margin: .5rem 0 1rem;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .4rem;
  background: repeating-linear-gradient(45deg, var(--surface), var(--surface) 10px, var(--bg) 10px, var(--bg) 20px);
}
.ad-modal__tag { font-size: .72rem; font-weight: 800; color: var(--accent); letter-spacing: .08em; }
.ad-modal__note { text-align: center; color: var(--ink-soft); font-size: .88rem; margin-bottom: 1rem; }
.ad-modal .btn--ghost { width: 100%; justify-content: center; align-self: stretch; }

/* ==========================================================================
   7. Content sections
   ========================================================================== */
.content-section { padding: clamp(2.5rem, 5vw, 4rem) clamp(1rem, 4vw, 2rem); }
.content-section--alt { background: var(--surface); border-radius: var(--radius); }
.content-section h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); margin-bottom: 1.2rem; text-align: center; }
.section-lead { max-width: 62ch; margin: 0 auto 1.8rem; text-align: center; color: var(--ink-soft); }

.steps-grid, .casos-grid { display: grid; gap: 1.2rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .steps-grid { grid-template-columns: repeat(3, 1fr); } .casos-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .casos-grid { grid-template-columns: repeat(3, 1fr); } }

.step-card, .caso-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.3rem;
}
.content-section--alt .step-card, .content-section--alt .caso-card { background: var(--bg); }
.step-card__num {
  display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px;
  border-radius: 50%; background: var(--accent-soft); color: var(--accent-dark); font-weight: 800; margin-bottom: .7rem;
}
.step-card h3, .caso-card h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.step-card p, .caso-card p { color: var(--ink-soft); font-size: .92rem; }

.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: .6rem; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: .2rem 1rem; }
.faq-item summary { padding: .9rem 0; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.2rem; color: var(--accent); flex-shrink: 0; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { padding-bottom: .9rem; color: var(--ink-soft); font-size: .92rem; }

/* ==========================================================================
   8. Footer
   ========================================================================== */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; margin-top: 2rem; }
.site-footer__inner { display: flex; flex-direction: column; gap: .6rem; align-items: center; text-align: center; font-size: .85rem; color: var(--ink-soft); }
.site-footer__inner nav { display: flex; gap: 1rem; }
.site-footer__disclaimer { font-size: .76rem; max-width: 60ch; }

/* ==========================================================================
   9. Reduced motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: .001ms !important; animation-duration: .001ms !important; }
}