:root {
  --purple-900: #2a0a22;
  --purple-800: #3d0e30;
  --purple-700: #4a0f3a;
  --pink: #da0081;
  --pink-glow: rgba(218, 0, 129, 0.35);
  --bg: #f4f5f7;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #5e6470;
  --border: #d9dde3;
  --border-strong: #c2c7d0;
  --warn-bg: #fff8db;
  --warn-border: #f1e4a0;
  --warn-text: #6b5a13;
  --info-bg: #eaf1ff;
  --info-border: #cfdcff;
  --info-text: #2348a8;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-btn: 0 4px 18px var(--pink-glow);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid #ececec;
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo { display: inline-flex; align-items: center; }
.logo-img {
  height: 32px;
  width: auto;
  display: block;
}
.footer-logo-img { height: 36px; }

.nav-desktop {
  display: none;
  gap: 28px;
  margin: 0 auto;
}
.nav-desktop a {
  color: #2a2f38;
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-desktop a:hover { color: var(--pink); }
.nav-desktop a.active { color: var(--text); font-weight: 700; }

.btn-login {
  display: none;
  align-items: center;
  background: #5b1aa8;
  color: #fff;
  padding: 10px 22px;
  border-radius: 10px;
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 600;
  transition: background 0.15s, transform 0.1s;
}
.btn-login:hover { background: #4a118c; }
.btn-login:active { transform: translateY(1px); }

.menu-btn {
  background: transparent;
  border: 0;
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 0 8px;
}
.menu-btn span {
  display: block;
  height: 2px;
  background: #1a1a1a;
  border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  background: var(--purple-900);
  color: #fff;
  overflow: hidden;
  padding: 56px 0 64px;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-bg .circle {
  position: absolute;
  border-radius: 50%;
  background: var(--pink);
  opacity: 0.85;
  filter: blur(0.5px);
}
.circle-1 {
  width: 320px; height: 320px;
  left: -140px; top: 60px;
  opacity: 0.55;
}
.circle-2 {
  width: 260px; height: 260px;
  right: -110px; top: -40px;
  opacity: 0.35;
}
.hero-content {
  position: relative;
  text-align: center;
}
.shield-icon {
  width: 56px; height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.shield-icon svg { width: 26px; height: 26px; }
.hero-title {
  font-size: 44px;
  line-height: 1.05;
  font-weight: 800;
  margin: 0 0 18px;
  letter-spacing: -0.5px;
}
.hero-sub {
  font-size: 17px;
  margin: 0 auto;
  max-width: 320px;
  opacity: 0.92;
  line-height: 1.45;
}

/* Stepper */
.stepper-wrap {
  background: var(--bg);
  padding: 22px 0 8px;
}
.stepper {
  list-style: none;
  margin: 0;
  padding: 0 4px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.stepper::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: var(--border);
  z-index: 0;
}
.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
  z-index: 1;
}
.step-circle {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: #e3e5ea;
  color: #8a8f99;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid transparent;
  transition: all 0.25s ease;
}
.step-circle svg { width: 20px; height: 20px; }
.step-label {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.2;
}
.step.active .step-circle {
  background: var(--pink);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(218,0,129,0.12);
}
.step.done .step-circle {
  background: var(--purple-800);
  color: #fff;
}
.step.active .step-label,
.step.done .step-label { color: var(--text); font-weight: 600; }

/* Main */
.main {
  padding: 18px 20px 36px;
}
.form-section { display: none; }
.form-section.active { display: block; animation: fade .25s ease; }
@keyframes fade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

/* Alerts */
.alert {
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 14.5px;
  line-height: 1.45;
  margin-bottom: 22px;
}
.alert-warning {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-text);
  text-align: center;
}
.alert-info {
  background: var(--info-bg);
  border: 1px solid var(--info-border);
  color: var(--info-text);
  display: flex;
  gap: 12px;
  margin-top: 8px;
}
.alert-info strong { display: block; margin-bottom: 4px; }
.alert-info p { margin: 0; }
.alert-icon {
  flex: 0 0 auto;
  width: 22px; height: 22px;
  color: var(--info-text);
}
.alert-icon svg { width: 22px; height: 22px; }

/* Form */
.form-title {
  font-size: 26px;
  font-weight: 800;
  margin: 8px 0 6px;
  letter-spacing: -0.3px;
}
.form-sub {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0 0 22px;
  line-height: 1.45;
}
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #2a2f38;
  margin-bottom: 8px;
}
.req { color: var(--pink); }
.field input,
.field select {
  width: 100%;
  box-sizing: border-box;
  height: 52px;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 0 16px;
  font-size: 16px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  text-align: left;
  transition: border-color .15s, box-shadow .15s;
}
.field input::placeholder { color: #9aa0aa; }
.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--pink);
  box-shadow: 0 0 0 3px rgba(218,0,129,0.15);
}
.select-wrap { position: relative; }
.select-wrap select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 44px;
  cursor: pointer;
}
.select-caret {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 18px;
  color: #6e7480;
  pointer-events: none;
}

/* Actions */
.actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 24px;
}
.actions.space-between { justify-content: space-between; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #111;
  color: #fff;
  border: 0;
  height: 52px;
  padding: 0 24px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  transition: transform .1s, box-shadow .2s;
}
.btn-primary:hover { box-shadow: 0 6px 22px var(--pink-glow); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary svg { width: 18px; height: 18px; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 0;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  padding: 12px 8px;
  font-family: inherit;
}
.btn-ghost:hover { color: var(--text); }
.btn-ghost svg { width: 18px; height: 18px; }

/* === Card / Validación === */
.card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  box-shadow: 0 6px 28px rgba(40, 10, 60, 0.06);
  border: 1px solid #ececf2;
}
.validation-card { text-align: center; margin-top: 8px; }
.card-title {
  font-size: 22px;
  font-weight: 800;
  margin: 18px 0 10px;
  color: var(--purple-900);
  line-height: 1.2;
}
.card-sub {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.5;
  margin: 0 auto 22px;
  max-width: 320px;
}
.card-note {
  color: #9aa0aa;
  font-size: 13px;
  margin: 18px 0 0;
}

.spinner {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 5px solid #f1d6e6;
  border-top-color: var(--pink);
  margin: 4px auto 0;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.progress-block { margin: 4px 0 22px; }
.progress-label {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.progress-bar {
  width: 100%;
  height: 8px;
  background: #ececf2;
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--pink);
  border-radius: 999px;
  transition: width 0.4s linear;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}
.check-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #f4f5f7;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  color: #6b7280;
  transition: all 0.3s ease;
}
.check-list li.done {
  background: #e7f7ec;
  color: #1d6b3a;
}
.check-icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: #d6dbe2;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex: 0 0 auto;
  transition: background 0.3s ease;
}
.check-icon svg { width: 14px; height: 14px; }
.check-list li.done .check-icon { background: #21b04b; }

/* === Validación minimal (nueva) === */
.validation-block {
  text-align: center;
  padding: 8px 0 20px;
}
.spinner.small {
  width: 44px;
  height: 44px;
  border-width: 4px;
  margin: 24px auto 22px;
}
.validation-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 8px;
}
.validation-sub {
  color: var(--text-muted);
  font-size: 14.5px;
  margin: 0 auto 24px;
  max-width: 320px;
}
.status-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: left;
}
.status-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text);
}
.status-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}
.status-done .status-icon {
  background: #21b04b;
  color: #fff;
}
.status-done .status-icon svg { width: 14px; height: 14px; }
.status-loading .status-icon {
  border: 2px solid #e6b800;
  background: transparent;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #e6b800;
  animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}

/* === Resultados === */
.alert-success {
  background: #e9f8ee;
  border: 1px solid #c2ebd0;
  color: #1d6b3a;
  display: flex;
  gap: 12px;
}
.alert-success strong { display: block; margin-bottom: 4px; }
.alert-success p { margin: 0; line-height: 1.45; }
.alert-icon.success { color: #21b04b; }

.product-card {
  background: #fff;
  border: 1.5px solid #d9c8ec;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 22px;
  box-shadow: 0 6px 24px rgba(40,10,60,0.06);
}
.product-card-img {
  background: #fff;
  padding: 36px 24px 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.product-card-img::after {
  content: "";
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  max-width: 220px;
  height: 14px;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.22) 0%, rgba(0,0,0,0) 70%);
  filter: blur(2px);
  z-index: 0;
}
.product-img {
  position: relative;
  z-index: 1;
  width: 88%;
  max-width: 300px;
  height: auto;
  display: block;
  filter: drop-shadow(0 18px 22px rgba(40, 10, 60, 0.25));
  transform: rotate(-8deg);
}
.product-img-placeholder {
  position: relative;
  z-index: 1;
  width: 80%;
  max-width: 260px;
  aspect-ratio: 16/10;
  border: 2px dashed rgba(255,255,255,0.45);
  border-radius: 12px;
  color: rgba(255,255,255,0.7);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-card-body { padding: 20px 20px 22px; }
.product-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.product-title {
  font-size: 18px;
  font-weight: 800;
  margin: 0;
  color: var(--text);
}
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  letter-spacing: 0.5px;
}
.badge-success { background: #d8f3df; color: #1d6b3a; }

.product-info {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.product-info li {
  display: flex;
  justify-content: space-between;
  font-size: 15px;
  color: var(--text-muted);
}
.product-info strong { color: var(--text); font-weight: 700; }
.text-success { color: #1d8c44 !important; }

.btn-purple {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 48px;
  background: var(--purple-800);
  color: #fff;
  border: 0;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-purple:hover { background: var(--purple-700); }
.btn-purple:active { transform: translateY(1px); }
.product-note {
  text-align: center;
  font-size: 12.5px;
  color: var(--text-muted);
  margin: 12px 0 0;
  line-height: 1.4;
}

.summary-card {
  background: #fff;
  border: 1.5px solid #d9c8ec;
  border-radius: 16px;
  padding: 22px 20px;
  margin-bottom: 22px;
  box-shadow: 0 6px 24px rgba(40,10,60,0.04);
}
.summary-title {
  font-size: 17px;
  font-weight: 700;
  text-align: center;
  margin: 0 0 18px;
  color: var(--text);
}
.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 12px;
  text-align: center;
}
.summary-value {
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 4px;
}
.summary-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  background: #fff;
  border-top: 1px solid #ececec;
  padding: 28px 0 32px;
  margin-top: 12px;
}
.footer-logo { margin-bottom: 16px; }
.footer-copy {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.5;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14.5px;
}
.footer-links a:hover { color: var(--pink); }

/* Form grid */
.form-grid { display: block; }
.form-grid .field { margin-bottom: 18px; }

/* === Responsive: tablet === */
@media (min-width: 640px) {
  .container { max-width: 720px; }
  .hero-title { font-size: 52px; }
}

/* === Responsive: desktop === */
@media (min-width: 900px) {
  .container { max-width: 1100px; padding: 0 32px; }

  /* Header */
  .header-inner { height: 76px; }
  .logo-img { height: 36px; }
  .nav-desktop { display: flex; }
  .btn-login { display: inline-flex; }
  .menu-btn { display: none; }

  /* Hero */
  .hero { padding: 64px 0 80px; }
  .hero-title {
    font-size: 56px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
  }
  .hero-title br { display: none; }
  .hero-sub { font-size: 18px; max-width: 520px; }
  .circle-1 { width: 460px; height: 460px; left: -180px; top: -80px; }
  .circle-2 { width: 380px; height: 380px; right: -160px; top: -60px; }

  /* Stepper */
  .stepper-wrap { padding: 36px 0 20px; }
  .stepper {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 20px;
  }
  .stepper::before { left: 15%; right: 15%; top: 28px; }
  .step-circle { width: 56px; height: 56px; }
  .step-circle svg { width: 24px; height: 24px; }
  .step-label { font-size: 13px; }

  /* Main */
  .main {
    padding: 28px 32px 48px;
    max-width: 820px;
  }

  /* Form 2-col grid */
  .form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 24px;
  }
  .form-grid .field { margin-bottom: 12px; }
  .form-grid .full { grid-column: 1 / -1; }
  .actions { margin-top: 12px; }

  /* Alert warning centered & wider */
  .alert-warning { font-size: 15px; padding: 16px 22px; }

  /* Form titles */
  .form-title { font-size: 30px; }
  .form-sub { font-size: 16px; }

  /* Result layout: product + summary side by side */
  .form-section[data-form="4"] {
    display: none;
  }
  .form-section[data-form="4"].active {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    column-gap: 28px;
    row-gap: 0;
  }
  .form-section[data-form="4"] > .form-title,
  .form-section[data-form="4"] > .form-sub,
  .form-section[data-form="4"] > .alert-success,
  .form-section[data-form="4"] > .alert-info,
  .form-section[data-form="4"] > .actions {
    grid-column: 1 / -1;
  }
  .form-section[data-form="4"] .product-card { margin-bottom: 0; align-self: start; }
  .form-section[data-form="4"] .summary-card { margin-bottom: 0; align-self: start; }

  /* Footer */
  .footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }
  .footer-left { display: flex; align-items: center; gap: 18px; }
  .footer-logo { margin-bottom: 0; }
  .footer-copy { margin: 0; }
}

@media (min-width: 1200px) {
  .container { max-width: 1180px; }
}

@media (max-width: 360px) {
  .hero-title { font-size: 38px; }
  .step-label { font-size: 11px; }
}