/* ═══════════════════════════════════════════════════════════════
   BATSÚ GARANTÍA — Design System CSS
   Brand Identity v2 · Anton + Inter + JetBrains Mono
   Navy #0D2D5E · Green #3A8C2F · Grain feTurbulence
   ═══════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────
   0. TOKENS
───────────────────────────────────── */
:root {
  /* ── Brand palette ── */
  --navy-ink:    #030B22;
  --navy-deep:   #06173A;
  --navy:        #0D2D5E;
  --navy-mid:    #183666;
  --green:       #3A8C2F;
  --green-bright:#52B23A;
  --green-muted: rgba(58,140,47,.14);
  --bone:        #EDE6D2;
  --white:       #FFFFFF;

  /* ── Contextual ── */
  --text:        #FFFFFF;
  --text-dim:    rgba(255,255,255,.65);
  --text-muted:  rgba(255,255,255,.35);
  --border:      rgba(255,255,255,.09);
  --border-green:rgba(58,140,47,.35);
  --c-error:     #ff6b6b;

  /* ── Grain SVG ── */
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23g)'/%3E%3C/svg%3E");

  /* ── Typography ── */
  --font-display: 'Anton', 'Impact', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* ── Geometry ── */
  --radius:    4px;
  --radius-lg: 8px;

  /* ── Legacy aliases (SVG refs inside HTML use these) ── */
  --c-navy:       var(--navy);
  --c-green:      var(--green);
  --c-green-soft: var(--green-muted);
  --c-card:       var(--navy);
  --c-bg:         var(--navy-ink);
  --c-text:       var(--text);
  --c-text-muted: var(--text-muted);
}

/* Light theme override */
[data-theme="light"] {
  --navy-ink:   #F0EDE6;
  --navy-deep:  #E4DFCF;
  --navy:       #FFFFFF;
  --text:       #030B22;
  --text-dim:   rgba(3,11,34,.68);
  --text-muted: rgba(3,11,34,.42);
  --border:     rgba(3,11,34,.1);
  --c-card:     #FFFFFF;
  --c-bg:       #F0EDE6;
  --c-text:     #030B22;
  --c-text-muted: rgba(3,11,34,.42);
}

/* ─────────────────────────────────────
   1. RESET / BASE
───────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--navy-ink);
  color: var(--text);
  min-height: 100dvh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* Global grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--grain);
  mix-blend-mode: overlay;
  opacity: 0.14;
  pointer-events: none;
  z-index: 0;
}

a { color: var(--green-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

img, svg { display: block; }

/* ─────────────────────────────────────
   2. LAYOUT
───────────────────────────────────── */
.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 16px;
  position: relative;
  z-index: 1;
}

/* ─────────────────────────────────────
   3. SITE HEADER
───────────────────────────────────── */
.site-header {
  background: var(--navy-deep);
  border-bottom: 2px solid var(--green);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 10px 0;
}

/* Voltage green top edge */
.site-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--green-bright);
  opacity: 0.4;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.brand__logo { height: 34px; width: auto; }

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--white);
  line-height: 1;
  text-transform: uppercase;
}

.brand__suffix {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.02em;
  text-transform: none;
}

/* JetBrains Mono chrome tagline */
.brand__tagline {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--green-bright);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.8;
}

.brand__bolt { flex-shrink: 0; opacity: 0.75; }

.header-tools { display: flex; align-items: center; gap: 8px; }

/* Lang switch */
.lang-switch {
  display: flex;
  background: rgba(0,0,0,.25);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 5px 9px;
  cursor: pointer;
  transition: all .15s;
  text-transform: uppercase;
}

.lang-btn.is-active,
.lang-btn:hover { background: var(--green); color: var(--white); }

/* Theme toggle */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 30px;
  height: 30px;
  border-radius: var(--radius);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all .15s;
}

.theme-toggle:hover { border-color: var(--green); color: var(--green); }
.icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: block; }

/* ─────────────────────────────────────
   4. MAIN
───────────────────────────────────── */
main.container {
  padding-top: 28px;
  padding-bottom: 64px;
}

/* ─────────────────────────────────────
   5. STEPPER
───────────────────────────────────── */
.stepper {
  margin-bottom: 24px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 4px;
}
.stepper::-webkit-scrollbar { display: none; }

.stepper__list {
  display: flex;
  list-style: none;
  position: relative;
  min-width: max-content;
}

.stepper__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  flex: 1;
  min-width: 72px;
  padding: 0 4px;
}

/* Connecting line */
.stepper__item::before {
  content: '';
  position: absolute;
  top: 13px;
  left: -50%; right: 50%;
  height: 1px;
  background: var(--border);
}
.stepper__item:first-child::before { display: none; }

.stepper__item.is-active::before,
.stepper__item.is-done::before   { background: var(--green); }

.stepper__bullet {
  width: 26px;
  height: 26px;
  border-radius: 2px;
  background: var(--navy-deep);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
  transition: all .2s;
}

.stepper__item.is-active .stepper__bullet {
  background: var(--green);
  border-color: var(--green-bright);
  color: var(--white);
  box-shadow: 0 0 10px rgba(58,140,47,.4);
}

.stepper__item.is-done .stepper__bullet {
  background: var(--green-muted);
  border-color: var(--green);
  color: var(--green-bright);
}

.stepper__label {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-align: center;
  margin-top: 5px;
  text-transform: uppercase;
  transition: color .2s;
}

.stepper__item.is-active .stepper__label { color: var(--green-bright); }
.stepper__item.is-done .stepper__label   { color: var(--text-dim); }

/* ─────────────────────────────────────
   6. STEP SECTIONS
───────────────────────────────────── */
.step           { display: none; }
.step.is-active { display: block; }

/* ─────────────────────────────────────
   7. CARD
───────────────────────────────────── */
.card {
  background: var(--navy);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255,255,255,.07);
}

/* Grain texture */
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grain);
  mix-blend-mode: overlay;
  opacity: 0.11;
  pointer-events: none;
  z-index: 0;
}

/* Green gradient top border */
.card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--green) 0%, var(--green-bright) 50%, transparent 100%);
  z-index: 2;
}

.card > * { position: relative; z-index: 1; }

/* ─────────────────────────────────────
   8. CARD HEAD
───────────────────────────────────── */
.card__head {
  padding: 28px 28px 20px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

/* Coordinate label — top right corner */
.card__head[data-coord]::after {
  content: attr(data-coord);
  position: absolute;
  top: 14px; right: 16px;
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.card__head-icon { margin-bottom: 12px; }

.card__title {
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: 0.03em;
  color: var(--white);
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 8px;
}

/* // prefix */
.card__title::before {
  content: '// ';
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 0.55em;
  vertical-align: middle;
  letter-spacing: 0;
}

.card__sub {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ─────────────────────────────────────
   9. FORM GRID + FIELDS
───────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 16px 28px 8px;
}

.field {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.05);
}

.field:not(.field--full) { padding-right: 14px; }

.field--full { grid-column: 1 / -1; }

.field:nth-child(even):not(.field--full) {
  padding-right: 0;
  padding-left: 14px;
  border-left: 1px solid rgba(255,255,255,.05);
}

label {
  display: block;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin-bottom: 6px;
  line-height: 1;
}

label .req { color: var(--green-bright); opacity: .7; }
label .opt { font-size: 8px; color: var(--text-muted); }

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
select,
textarea {
  width: 100%;
  background: var(--navy-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 9px 12px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  -webkit-appearance: none;
  appearance: none;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24'%3E%3Cpath fill='%2352B23A' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}

select option { background: var(--navy-deep); color: var(--white); }

input:focus, select:focus, textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(58,140,47,.18);
}

input::placeholder, textarea::placeholder {
  color: var(--text-muted);
  font-size: 13px;
}

textarea { resize: vertical; min-height: 64px; }

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(.5) sepia(1) saturate(2) hue-rotate(90deg);
  cursor: pointer;
}

input:disabled, select:disabled { opacity: .4; cursor: not-allowed; }

/* Serial scan row */
.serial-input-wrap { display: flex; gap: 6px; }
.serial-input-wrap input { flex: 1; }

.btn-scan {
  flex-shrink: 0;
  width: 40px; height: 40px;
  background: var(--green-muted);
  border: 1px solid var(--border-green);
  border-radius: var(--radius);
  color: var(--green-bright);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all .15s;
}
.btn-scan:hover { background: var(--green); color: var(--white); border-color: var(--green); }

/* Help icon */
.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px; height: 14px;
  background: var(--green-muted);
  border: 1px solid var(--border-green);
  border-radius: 50%;
  font-size: 9px;
  color: var(--green-bright);
  cursor: help;
  vertical-align: middle;
  font-family: var(--font-mono);
  font-weight: 700;
  position: relative;
}

.help-icon:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--navy-ink);
  border: 1px solid var(--border-green);
  color: var(--text-dim);
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.4;
  padding: 8px 12px;
  border-radius: var(--radius);
  width: 220px;
  white-space: normal;
  z-index: 10;
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
}

/* Field hints & errors */
.field__hint {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 5px;
  line-height: 1.4;
}

.field__hint--scan { color: var(--green-bright); }

.field__error {
  font-family: var(--font-mono);
  font-size: 10px;
  color: #ff6b6b;
  margin-top: 5px;
  min-height: 0;
}

.field__error:not(:empty) {
  background: rgba(255,107,107,.08);
  border-left: 2px solid #ff6b6b;
  padding: 4px 8px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

input.is-invalid, select.is-invalid, textarea.is-invalid {
  border-color: var(--c-error);
  box-shadow: 0 0 0 2px rgba(255,107,107,.18);
}

/* Estados de campo validados por JS */
.field.has-error input,
.field.has-error select,
.field.has-error textarea {
  border-color: var(--c-error);
  box-shadow: 0 0 0 2px rgba(255,107,107,.15);
}

.field.is-valid input,
.field.is-valid select,
.field.is-valid textarea {
  border-color: var(--green);
  box-shadow: 0 0 0 2px rgba(58,140,47,.12);
}

/* ─────────────────────────────────────
   10. SECTION TITLE (inside card body)
───────────────────────────────────── */
.section-title {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-bright);
  padding: 16px 28px 8px;
  border-bottom: 1px solid var(--border);
}

.section-title::before { content: '// '; opacity: .55; }

/* ─────────────────────────────────────
   11. NAV BUTTONS
───────────────────────────────────── */
.step__nav {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 18px 28px 24px;
  border-top: 1px solid var(--border);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 10px 20px;
  cursor: pointer;
  text-decoration: none;
  transition: all .15s;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--green);
  color: var(--white);
  border: 1px solid var(--green-bright);
}

/* Grain on primary button */
.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grain);
  mix-blend-mode: overlay;
  opacity: 0.15;
  pointer-events: none;
}

.btn--primary:hover {
  background: var(--green-bright);
  box-shadow: 0 0 16px rgba(82,178,58,.3);
  text-decoration: none;
  color: var(--white);
}

.btn--primary:disabled,
.btn--primary[disabled] { opacity: .35; cursor: not-allowed; box-shadow: none; }

.btn--block { width: 100%; justify-content: center; }

.btn--ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn--ghost:hover { border-color: var(--text-dim); color: var(--white); text-decoration: none; }

.btn--text {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 6px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
}
.btn--text:hover { color: var(--green-bright); }

.btn--whatsapp {
  background: #25D366;
  color: var(--white);
  border: 1px solid rgba(255,255,255,.2);
}
.btn--whatsapp:hover { background: #128C7E; text-decoration: none; }

/* ─────────────────────────────────────
   12. POLICY
───────────────────────────────────── */
.policy {
  max-height: 280px;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  scrollbar-width: thin;
  scrollbar-color: var(--green) transparent;
}

.policy::-webkit-scrollbar       { width: 3px; }
.policy::-webkit-scrollbar-thumb { background: var(--green); border-radius: 2px; }

.policy h2 {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin: 20px 0 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.policy h2:first-of-type { border-top: none; margin-top: 8px; }
.policy h2::before { content: '// '; opacity: .55; }

.policy p, .policy li {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.65;
  margin-bottom: 10px;
}

.policy ul { padding-left: 18px; margin-bottom: 10px; }
.policy li { margin-bottom: 4px; }
.policy a { color: var(--green-bright); }

.policy__intro {
  background: var(--green-muted);
  border-left: 2px solid var(--green);
  padding: 12px 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 13px;
  margin-bottom: 16px;
}

.policy strong { color: var(--white); }

.policy-actions {
  padding: 20px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-bottom: 1px solid var(--border);
}

.link-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-bright);
  text-decoration: none;
}
.link-download:hover { text-decoration: underline; }

/* Checkbox */
.checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0; height: 0;
}

.checkbox__box {
  flex-shrink: 0;
  width: 18px; height: 18px;
  background: var(--navy-deep);
  border: 1px solid var(--border);
  border-radius: 2px;
  display: grid;
  place-items: center;
  margin-top: 2px;
  transition: all .15s;
}

.checkbox input:checked ~ .checkbox__box {
  background: var(--green);
  border-color: var(--green-bright);
}

.checkbox input:checked ~ .checkbox__box::after {
  content: '✓';
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
}

.checkbox__text {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

.checkbox:has(input:disabled) { opacity: .4; cursor: not-allowed; }

.hint {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.hint--right  { text-align: right; }
.hint--center { text-align: center; }

/* ─────────────────────────────────────
   13. SIGNATURE
───────────────────────────────────── */
.signature {
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
}

.signature__pad-wrap {
  position: relative;
  background: var(--navy-deep);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 200px;
  /* touch: evitar que el scroll de página capture el gesto de firma */
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

#signaturePad {
  display: block;
  width: 100%;
  height: 200px;       /* altura fija: evita crecimiento infinito al calcular ratio */
  cursor: crosshair;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.signature__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  pointer-events: none;
  transition: opacity .2s;
}

.signature__placeholder.is-hidden { opacity: 0; }

.signature__actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

/* ─────────────────────────────────────
   14. CONFIRM SUMMARY
───────────────────────────────────── */
.confirm-summary { padding: 16px 28px 4px; }

/* Título generado por JS */
.confirm-summary h3 {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin-bottom: 10px;
}
.confirm-summary h3::before { content: '// '; opacity: .55; }

/* DL generado por JS */
.confirm-summary dl {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 12px;
}
.confirm-summary dl > div { background: var(--navy-deep); padding: 9px 12px; }
.confirm-summary dt {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin-bottom: 3px;
}
.confirm-summary dd {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Clases legacy (por si algún código viejo las usa) */
.confirm-summary__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 12px;
}
.confirm-summary__item { background: var(--navy-deep); padding: 10px 14px; }
.confirm-summary__label {
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.1em;
  color: var(--green-bright); text-transform: uppercase; margin-bottom: 3px;
}
.confirm-summary__value {
  font-size: 13px; color: var(--white); font-weight: 500;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* ─────────────────────────────────────
   15. WARRANTY PREVIEW — StatBlock pattern
───────────────────────────────────── */
.warranty-preview {
  margin: 12px 28px 16px;
  background: var(--navy-deep);
  border: 2px solid var(--green);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  text-align: center;
  position: relative;
}

/* Floating label */
.warranty-preview::before {
  content: 'PREVIEW';
  position: absolute;
  top: 0; left: 16px;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.14em;
  color: var(--green-bright);
  background: var(--navy-deep);
  padding: 0 6px;
  transform: translateY(-50%);
}

.warranty-preview__label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}

.warranty-preview__value {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--white);
  font-weight: 700;
}

.warranty-preview__hint {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-muted);
  margin-top: 8px;
  letter-spacing: 0.05em;
}

/* ─────────────────────────────────────
   16. SUCCESS STEP
───────────────────────────────────── */
.card--success {
  text-align: center;
  padding: 40px 28px;
}

/* Square check icon */
.success__check {
  width: 68px; height: 68px;
  background: var(--green-muted);
  border: 2px solid var(--green);
  border-radius: 2px;
  display: grid;
  place-items: center;
  margin: 0 auto 24px;
  color: var(--green-bright);
  position: relative;
}

.success__check::before {
  content: '';
  position: absolute;
  inset: 5px;
  border: 1px solid var(--border-green);
  border-radius: 1px;
}

.success__title {
  font-family: var(--font-display);
  font-size: 28px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 12px;
  line-height: 1.1;
}

.success__sub {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.6;
  max-width: 460px;
  margin: 0 auto 28px;
}

.certificate {
  background: var(--navy-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  text-align: left;
  margin-bottom: 20px;
}

/* Elementos internos del certificado generado por JS */
.certificate__warranty-no {
  text-align: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}
.certificate__warranty-no small {
  display: block;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin-bottom: 6px;
}
.certificate__warranty-no strong {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.06em;
  color: var(--text);
  word-break: break-all;
}
.certificate__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}
.certificate__field small {
  display: block;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin-bottom: 3px;
}
.certificate__field span {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
  word-break: break-word;
}
.certificate__signature {
  border-top: 1px solid var(--border);
  padding-top: 12px;
  text-align: center;
}
.certificate__signature small {
  display: block;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.certificate__signature img {
  max-height: 70px;
  max-width: 200px;
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
}

/* QR block */
.qr-block {
  background: var(--navy-deep);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.qr-block__title {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--green-bright);
}

.qr-block img { border: 2px solid var(--border); border-radius: var(--radius); }

.qr-block__verify-link {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green-bright);
  word-break: break-all;
}

.success__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 20px;
}

/* ─────────────────────────────────────
   17. LOADING OVERLAY
───────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(3,11,34,.93);
  display: grid;
  place-items: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.overlay[hidden] { display: none; }

.overlay__box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spinner {
  width: 36px; height: 36px;
  border: 2px solid var(--border);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin .75s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.overlay__text {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
}

.overlay__subtext {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ─────────────────────────────────────
   18. TOAST
───────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 20px;
  right: 16px; left: 16px;
  max-width: 500px;
  margin: 0 auto;
  background: var(--navy-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  z-index: 900;
  box-shadow: 0 8px 32px rgba(0,0,0,.45);
}

.toast[hidden] { display: none; }

.toast__accent {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--c-error);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.toast--success .toast__accent { background: var(--green); }
.toast--success { border-color: rgba(58,140,47,.25); }

.toast__icon { font-size: 18px; flex-shrink: 0; }

.toast__content {
  flex: 1;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

.toast__close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
  padding: 0;
}

/* ─────────────────────────────────────
   19. SITE FOOTER
───────────────────────────────────── */
.site-footer {
  background: var(--navy-deep);
  border-top: 1px solid var(--border);
  padding: 14px 0;
  position: relative;
  z-index: 1;
}

/* ★ chrome line ★ */
.site-footer::before {
  content: '★  BATSÚ ENERGY  ·  COSTA RICA  ★';
  display: block;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.22em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.site-footer p {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.05em;
  line-height: 1.8;
}

.site-footer a { color: var(--text-muted); text-decoration: none; }
.site-footer a:hover { color: var(--green-bright); text-decoration: underline; }

/* ─────────────────────────────────────
   20. RESPONSIVE
───────────────────────────────────── */
@media (max-width: 480px) {
  /* ── Layout ── */
  .container { padding: 0 12px; }
  main.container { padding-top: 20px; padding-bottom: 48px; }

  /* ── Stepper ── */
  .stepper { margin-bottom: 16px; }
  .stepper__item { min-width: 60px; }
  .stepper__bullet { width: 24px; height: 24px; font-size: 9px; }

  /* ── Tarjeta ── */
  .card__head { padding: 18px 16px 14px; }
  /* Ocultar la anotación de coordenada en móvil (demasiado críptica) */
  .card__head[data-coord]::after { display: none; }
  .card__title { font-size: 19px; }
  .card__sub   { font-size: 12px; }
  .card__head-icon { display: none; } /* iconos SVG decorativos: no los necesita en móvil */

  /* ── Formulario ── */
  .form-grid {
    grid-template-columns: 1fr;
    padding: 10px 16px 4px;
  }
  .field:not(.field--full) { padding-right: 0; }
  .field:nth-child(even):not(.field--full) { padding-left: 0; border-left: none; }

  /* iOS: inputs ≥16px evitan el zoom automático al enfocar */
  input[type="text"],
  input[type="email"],
  input[type="tel"],
  input[type="date"],
  select,
  textarea { font-size: 16px; }

  /* Textarea un poco más alto para que sea cómodo escribir */
  textarea { min-height: 80px; }

  /* ── Políticas ── */
  .policy         { padding: 14px 16px; max-height: 220px; }
  .policy-actions { padding: 14px 16px; }
  .section-title  { padding: 14px 16px 8px; }

  /* ── Firma ── */
  .signature { padding: 14px 16px; }
  #signaturePad,
  .signature__pad-wrap { height: 220px; min-height: 220px; }
  .hint--right { text-align: left; } /* evitar que el hint se vea raro en pantallas angostas */

  /* ── Resumen paso 5 ── */
  .confirm-summary { padding: 12px 16px 0; }
  .confirm-summary dl { grid-template-columns: 1fr; } /* 1 columna en móvil */
  .confirm-summary dd { white-space: normal; }        /* permitir wrap en datos largos */

  /* ── Preview garantía ── */
  .warranty-preview { margin: 12px 16px 14px; }
  .warranty-preview__value { font-size: 16px; }

  /* ── Botones de navegación ── */
  .step__nav {
    padding: 12px 16px 18px;
    gap: 8px;
    flex-direction: column-reverse; /* primaria (Continuar) arriba, atrás abajo */
  }
  /* Botón primario ocupa todo el ancho */
  .step__nav .btn--primary { width: 100%; justify-content: center; font-size: 14px; }
  /* Touch targets mínimos 44px */
  .btn { min-height: 44px; font-size: 13px; padding: 10px 16px; }
  .btn--block { font-size: 14px; }

  /* ── Éxito ── */
  .card--success { padding: 28px 16px; }
  .success__title { font-size: 21px; }
  .success__actions { flex-direction: column; align-items: stretch; }
  .success__actions .btn { justify-content: center; }
  .certificate__grid { grid-template-columns: 1fr; gap: 8px; }
  .certificate__warranty-no strong { font-size: 16px; }

  /* ── Header ── */
  .brand__tagline { display: none; }
  .brand__name    { font-size: 15px; }

  /* ── Footer ── */
  .site-footer::before { font-size: 7px; letter-spacing: 0.10em; }
  .site-footer p { font-size: 9px; line-height: 2; }
}

@media (max-width: 360px) {
  .stepper__label { display: none; }
  .brand__suffix  { display: none; } /* "Energy Enterprise" no cabe en pantallas de 320px */
  .brand__logo    { height: 28px; }
}

/* ─────────────────────────────────────
   21. UTILITY
───────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

[hidden] { display: none !important; }

#confettiCanvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 500;
}