/**
 * Guardian — guardian.desarrollado.com
 */
:root,
[data-theme="dark"] {
  color-scheme: dark;
  --font: "Roboto", system-ui, sans-serif;
  --md-sys-color-primary: #7dd8da;
  --md-sys-color-on-primary: #003738;
  --md-sys-color-primary-container: #0d5c52;
  --md-sys-color-on-primary-container: #a8f0ee;
  --md-sys-color-tertiary: #b4c5ff;
  --md-sys-color-surface: #0f1413;
  --md-sys-color-on-surface: #e0e3e1;
  --md-sys-color-on-surface-variant: #bfc9c5;
  --md-sys-color-surface-container: #1a211f;
  --md-sys-color-surface-container-high: #242b29;
  --md-sys-color-outline-variant: #3f4946;
  --radius-lg: 20px;
  --radius-pill: 999px;
}

[data-theme="light"] {
  color-scheme: light;
  --md-sys-color-primary: #00696a;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #a8f0ee;
  --md-sys-color-on-primary-container: #002021;
  --md-sys-color-tertiary: #3b5ba9;
  --md-sys-color-surface: #f5fbf8;
  --md-sys-color-on-surface: #191c1b;
  --md-sys-color-on-surface-variant: #3f4946;
  --md-sys-color-surface-container: #e8efec;
  --md-sys-color-surface-container-high: #e2eae6;
  --md-sys-color-outline-variant: #bfc9c5;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--md-sys-color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
  padding: 0 1.25rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--md-sys-color-surface) 92%, transparent);
  backdrop-filter: blur(12px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--md-sys-color-on-surface);
  text-decoration: none;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, #0d7a6b, var(--md-sys-color-primary));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}

.nav { display: flex; align-items: center; gap: 0.25rem; flex-wrap: wrap; }
.nav a:not(.btn) {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
}
.nav a:not(.btn):hover {
  color: var(--md-sys-color-on-surface);
  background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
  text-decoration: none;
}

.menu-toggle {
  display: none;
  border: none;
  background: transparent;
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-pill);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  font: inherit;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}
.btn-outlined {
  background: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline-variant);
}
.btn-lg { padding: 0.75rem 1.5rem; font-size: 0.95rem; }

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 4rem 1.25rem 3rem;
  text-align: center;
}
.hero-compact { padding-top: 2.5rem; padding-bottom: 1.5rem; }
.eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--md-sys-color-primary);
  margin-bottom: 0.75rem;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}
.gradient {
  background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-tertiary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead {
  font-size: 1.1rem;
  color: var(--md-sys-color-on-surface-variant);
  max-width: 56ch;
  margin: 0 auto 1.5rem;
}
.hero-actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem;
}
.section h2 { font-size: 1.6rem; margin-bottom: 0.5rem; }
.subtitle { color: var(--md-sys-color-on-surface-variant); margin-bottom: 1.5rem; }
.section-muted {
  background: var(--md-sys-color-surface-container);
  border-radius: var(--radius-lg);
  margin: 0 auto 2rem;
  max-width: 1080px;
  padding: 2.5rem 1.25rem;
  text-align: center;
}
.section-muted .subtitle {
  margin-left: auto;
  margin-right: auto;
  max-width: 52ch;
}

.steps {
  display: grid;
  gap: 1rem;
  counter-reset: step;
  max-width: 960px;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}
.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
  padding: 1.25rem 1rem;
  border-radius: var(--radius-lg);
  background: var(--md-sys-color-surface-container-high);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.95rem;
}
.step strong { display: block; font-size: 1rem; }
.step .text-muted { font-size: 0.88rem; line-height: 1.55; }

.purchase-form {
  max-width: 480px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: left;
  border-radius: var(--radius-lg);
  background: var(--md-sys-color-surface-container-high);
  border: 1px solid var(--md-sys-color-outline-variant);
}
.purchase-form .field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
}
.purchase-form .field span { font-weight: 500; color: var(--md-sys-color-on-surface-variant); }
.purchase-form input {
  font: inherit;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
}
.purchase-form .checkbox-field {
  flex-direction: row;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.85rem;
  line-height: 1.5;
}
.purchase-form .checkbox-field input { margin-top: 0.2rem; }
.price-highlight {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--md-sys-color-primary);
  margin: 0.25rem 0 0.5rem;
}
.form-error { color: #e57373; font-size: 0.9rem; }
.form-hint { font-size: 0.8rem; text-align: center; margin: 0; color: var(--md-sys-color-on-surface-variant); }

.thank-you-page {
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}
.thank-you-icon {
  font-size: 3rem;
  color: var(--md-sys-color-primary);
}
.thank-you-page h1 { margin: 1rem 0 0.5rem; }
.ref-line { font-size: 0.85rem; margin: 0.75rem 0 1.25rem; }
.thank-you-note { font-size: 0.9rem; margin-top: 1rem; line-height: 1.6; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.feature-card {
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--md-sys-color-surface-container-high);
  border: 1px solid var(--md-sys-color-outline-variant);
}
.feature-card .material-symbols-outlined {
  font-size: 2rem;
  color: var(--md-sys-color-primary);
  margin-bottom: 0.5rem;
}
.feature-card h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.feature-card p { font-size: 0.9rem; color: var(--md-sys-color-on-surface-variant); }

.download-box {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--md-sys-color-primary) 10%, var(--md-sys-color-surface-container));
  border: 1px solid color-mix(in srgb, var(--md-sys-color-primary) 25%, transparent);
}
.download-box p { margin-bottom: 1rem; color: var(--md-sys-color-on-surface-variant); }
.version-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  margin-bottom: 0.75rem;
}

.legal-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}
.legal-page h1 { margin-bottom: 0.5rem; }
.legal-page h2 { margin: 1.75rem 0 0.5rem; font-size: 1.15rem; }
.legal-page p, .legal-list { margin-bottom: 0.75rem; line-height: 1.7; }
.legal-list { padding-left: 1.25rem; }
.text-muted { color: var(--md-sys-color-on-surface-variant); }

.diagram-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: 1.25rem;
}
.diagram-card {
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--md-sys-color-surface-container-high);
  border: 1px solid var(--md-sys-color-outline-variant);
}
.diagram-card h3 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
}
.diagram-caption {
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 1rem;
  line-height: 1.55;
}
.diagram-host {
  min-height: 120px;
  overflow-x: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}
.diagram-host svg {
  max-width: 100%;
  height: auto;
}
.diagram-host[aria-busy="true"]::after {
  content: "Cargando diagrama…";
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface-variant);
}
.diagram-error {
  font-size: 0.85rem;
  color: #e57373;
  text-align: center;
  padding: 1rem;
}
.diagram-full {
  grid-column: 1 / -1;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 1.25rem;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface-variant);
}
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; }

.theme-fab {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

@media (max-width: 720px) {
  .menu-toggle { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    background: var(--md-sys-color-surface);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
  }
  .nav.open { display: flex; }
}