/* ============================================================
   CENTINELA P2P: styles.css
   Design tokens per brief.md (explicit values override niche defaults):
   color_primary #0f172a (navy), color_bg #ffffff, color_cta/accent #7c3aed (violeta)
   Typography: Inter 700 (headings) / Inter 400 (body)
   Composition: dark navy bookend (nav + hero, cta-final + footer),
   light content body in between. Deliberate, single color-block device.
   ============================================================ */

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body,
h1,
h2,
h3,
p,
ul,
figure {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ---------- Design tokens ---------- */
:root {
  /* Base surfaces (light, brief.md color_bg override) */
  --color-bg: #ffffff;
  --color-surface: #f8fafc;
  --color-surface-raised: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-subtle: #eef2f7;

  /* Text on light */
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;

  /* Brand: navy (primary) + violet (cta/accent), per brief.md */
  --color-brand: #0f172a;
  --color-brand-hover: #1e293b;
  --color-brand-subtle: rgba(15, 23, 42, 0.06);

  --color-cta: #7c3aed;
  --color-cta-hover: #6d28d9;
  --color-cta-subtle: rgba(124, 58, 237, 0.08);

  /* Dark bookend surfaces (nav, hero, cta-final, footer) */
  --color-dark-bg: #0f172a;
  --color-dark-surface: #16213e;
  --color-dark-surface-raised: #1c2a4a;
  --color-dark-border: rgba(248, 250, 252, 0.12);
  --color-dark-text-primary: #f8fafc;
  --color-dark-text-secondary: #b6c2d9;
  --color-dark-text-muted: #8592ad;

  /* Feedback */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Text on solid brand/cta fills */
  --color-on-brand: #ffffff;

  /* Typography scale */
  --font-xs: 0.75rem;
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 1.875rem;
  --font-4xl: 2.25rem;
  --font-5xl: 3rem;
  --font-6xl: 3.75rem;

  /* Spatial grid (8px base) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 2.5rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-10: 5rem;
  --space-12: 6rem;
  --space-16: 8rem;

  /* Radius */
  --radius-card: 14px;
  --radius-btn: 8px;
  --radius-pill: 999px;
  --radius-input: 8px;

  /* Motion (subtle) */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 180ms;
  --duration-base: 320ms;
}

/* ---------- Base ---------- */
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 400;
  font-size: var(--font-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

p {
  color: var(--color-text-secondary);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1200px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* Anchor targets shouldn't clip under the ~90px sticky nav on scroll-to */
[id] {
  scroll-margin-top: var(--space-12);
}

/* Focus states: every interactive element */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-cta);
  outline-offset: 2px;
  border-radius: 4px;
}

.icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: var(--font-base);
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
  min-height: 44px;
}

.btn:active {
  transform: scale(0.98);
}

.btn-cta {
  background: var(--color-cta);
  color: var(--color-on-brand);
}

.btn-cta:hover {
  background: var(--color-cta-hover);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-dark-text-primary);
  border: 1px solid var(--color-dark-border);
}

.btn-outline-dark:hover {
  background: rgba(248, 250, 252, 0.08);
}

.btn-large {
  /* Base (mobile-first): keep .btn padding, allow the label to wrap and cap
     width to the container so long labels (e.g. "Pagar con Stripe Checkout")
     never force horizontal overflow at 320px. Larger padding/type restored
     at tablet+ below. */
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-base);
  white-space: normal;
  max-width: 100%;
  text-align: center;
}

@media (min-width: 768px) {
  .btn-large {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-lg);
  }
}

/* ---------- Scroll reveal (subtle motion) ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================================
   NAV
   ============================================================ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  background: var(--color-dark-bg);
  border-bottom: 1px solid var(--color-dark-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
  min-height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-dark-text-primary);
  font-weight: 700;
  font-size: var(--font-lg);
  min-height: 44px;
}

.nav-brand .icon {
  width: 28px;
  height: 28px;
  color: var(--color-cta);
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-4);
}

.nav-links a {
  color: var(--color-dark-text-secondary);
  font-size: var(--font-sm);
  font-weight: 500;
  padding: var(--space-1) 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-links a:hover {
  color: var(--color-dark-text-primary);
}

.nav-cta {
  display: none;
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-dark-text-primary);
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

.nav-mobile-panel {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2) 0 var(--space-4);
  border-top: 1px solid var(--color-dark-border);
}

.nav-mobile-panel.is-open {
  display: flex;
}

.nav-mobile-panel a {
  color: var(--color-dark-text-secondary);
  font-size: var(--font-base);
  padding: var(--space-2) 0;
}

.nav-mobile-panel a:hover {
  color: var(--color-dark-text-primary);
}

.nav-mobile-panel .btn-cta {
  margin-top: var(--space-1);
  width: 100%;
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }

  .nav-cta {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }

  .nav-mobile-panel,
  .nav-mobile-panel.is-open {
    display: none;
  }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: var(--color-dark-bg);
  background-image: radial-gradient(
    ellipse 900px 500px at 80% -10%,
    rgba(124, 58, 237, 0.16),
    transparent 60%
  );
  color: var(--color-dark-text-primary);
  padding-top: var(--space-10);
  padding-bottom: var(--space-12);
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.hero-headline {
  font-size: var(--font-4xl);
  line-height: 1.1;
}

.hero-sub {
  margin-top: var(--space-3);
  font-size: var(--font-lg);
  color: var(--color-dark-text-secondary);
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  margin-top: var(--space-4);
  display: flex;
  justify-content: center;
}

.hero-proof {
  margin-top: var(--space-4);
  font-size: var(--font-sm);
  color: var(--color-dark-text-muted);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.hero-proof .icon {
  width: 16px;
  height: 16px;
  color: var(--color-success);
}

@media (min-width: 768px) {
  .hero {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }

  .hero-headline {
    font-size: var(--font-6xl);
  }
}

/* ============================================================
   TRUST / CONFIANZA Y CUSTODIA
   ============================================================ */
.trust {
  background: var(--color-bg);
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--color-border-subtle);
}

.section-head {
  max-width: 640px;
  margin: 0 auto var(--space-6);
  text-align: center;
}

.trust .section-head h2 {
  font-size: var(--font-3xl);
}

@media (min-width: 768px) {
  .trust .section-head h2 {
    font-size: var(--font-4xl);
  }
}

.trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

.trust-card {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  transition: border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.trust-card:hover {
  border-color: var(--color-cta);
  box-shadow: 0 2px 12px rgba(124, 58, 237, 0.1);
}

.trust-card-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.trust-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: var(--radius-btn);
  background: var(--color-brand);
}

.trust-card-icon .icon {
  color: var(--color-on-brand);
  width: 18px;
  height: 18px;
}

@media (min-width: 768px) {
  .trust-card-icon {
    width: 44px;
    height: 44px;
  }

  .trust-card-icon .icon {
    width: 20px;
    height: 20px;
  }
}

.trust-card h3 {
  font-size: var(--font-lg);
}

.trust-card p {
  font-size: var(--font-sm);
}

/* ============================================================
   COMO FUNCIONA (numbered vertical steps)
   ============================================================ */
.steps {
  background: var(--color-surface);
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.steps .section-head h2 {
  font-size: var(--font-3xl);
}

@media (min-width: 768px) {
  .steps .section-head h2 {
    font-size: var(--font-4xl);
  }
}

.steps-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-3);
  position: relative;
  padding-bottom: var(--space-6);
}

.step:last-child {
  padding-bottom: 0;
}

.step::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 48px;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.step:last-child::before {
  display: none;
}

.step-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-card) var(--radius-btn) var(--radius-card) var(--radius-btn);
  background: var(--color-brand);
  color: var(--color-on-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 1;
}

.step-badge .icon {
  width: 22px;
  height: 22px;
}

.step-featured .step-badge {
  background: var(--color-cta);
}

.step-body {
  padding-top: var(--space-1);
}

.step-body h3 {
  font-size: var(--font-xl);
}

.step-body p {
  margin-top: var(--space-1);
}

.step-shot {
  display: block;
  width: 100%;
  height: auto;
  margin-top: var(--space-3);
  border-radius: var(--radius-lg, 16px);
  border: 1px solid var(--color-dark-border);
}

/* ============================================================
   PRUEBA (proof stats)
   ============================================================ */
.proof {
  background: var(--color-bg);
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.proof .section-head h2 {
  font-size: var(--font-3xl);
}

@media (min-width: 768px) {
  .proof .section-head h2 {
    font-size: var(--font-4xl);
  }
}

.proof-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .proof-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }
}

.proof-card {
  padding: var(--space-4);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.proof-card h3 {
  font-size: var(--font-xl);
  font-variant-numeric: tabular-nums;
  color: var(--color-brand);
}

.proof-card p {
  margin-top: var(--space-2);
  font-size: var(--font-sm);
}

/* ============================================================
   PRECIO (single-tier pricing)
   ============================================================ */
.pricing {
  background: var(--color-bg);
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.pricing .section-head h2 {
  font-size: var(--font-3xl);
}

@media (min-width: 768px) {
  .pricing .section-head h2 {
    font-size: var(--font-4xl);
  }
}

.pricing-card {
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-6);
  border-radius: var(--radius-card);
  background: var(--color-brand);
  color: var(--color-dark-text-primary);
  text-align: center;
}

.pricing-price {
  font-size: var(--font-3xl);
  font-weight: 700;
  display: block;
  margin-bottom: var(--space-2);
}

.pricing-card p {
  color: var(--color-dark-text-secondary);
  font-size: var(--font-base);
  line-height: 1.7;
}

/* ============================================================
   GATE DE CALIFICACION
   ============================================================ */
.gate {
  background: var(--color-surface);
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
}

.gate-box {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-4);
  border: 1px solid var(--color-cta);
  border-radius: var(--radius-card);
  background: var(--color-cta-subtle);
}

.gate-box h2 {
  font-size: var(--font-xl);
  margin-bottom: var(--space-2);
}

.gate-box > p {
  margin-bottom: var(--space-3);
}

.gate-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.gate-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  color: var(--color-text-primary);
  font-weight: 500;
}

.gate-list .icon {
  color: var(--color-cta);
  margin-top: 2px;
}

/* ============================================================
   CTA FINAL
   ============================================================ */
.cta-final {
  background: var(--color-dark-bg);
  color: var(--color-dark-text-primary);
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
  text-align: center;
}

.cta-final-inner {
  max-width: 640px;
  margin: 0 auto;
}

.cta-final h2 {
  font-size: var(--font-3xl);
}

@media (min-width: 768px) {
  .cta-final h2 {
    font-size: var(--font-4xl);
  }
}

.cta-final p {
  margin-top: var(--space-3);
  color: var(--color-dark-text-secondary);
  font-size: var(--font-lg);
}

.cta-final-actions {
  margin-top: var(--space-5);
  display: flex;
  justify-content: center;
}

/* ============================================================
   FAQ
   ============================================================ */
.faq {
  background: var(--color-bg);
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.faq .section-head h2 {
  font-size: var(--font-3xl);
}

@media (min-width: 768px) {
  .faq .section-head h2 {
    font-size: var(--font-4xl);
  }
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  font-size: var(--font-base);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary .icon {
  color: var(--color-cta);
  transition: transform var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}

.faq-item[open] summary .icon {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background: var(--color-surface);
}

.faq-item-body {
  padding: 0 var(--space-4) var(--space-4);
}

.faq-item-body p {
  font-size: var(--font-sm);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--color-dark-bg);
  color: var(--color-dark-text-secondary);
  padding-top: var(--space-8);
  padding-bottom: var(--space-6);
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-dark-border);
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-dark-text-primary);
  font-weight: 700;
  font-size: var(--font-lg);
  min-height: 44px;
}

.footer-brand .icon {
  width: 24px;
  height: 24px;
  color: var(--color-cta);
}

.footer-tagline {
  margin-top: var(--space-1);
  font-size: var(--font-sm);
  color: var(--color-dark-text-muted);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
}

.footer-nav a {
  font-size: var(--font-sm);
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: var(--space-1) var(--space-2);
}

.footer-nav a:hover {
  color: var(--color-dark-text-primary);
}

.footer-bottom {
  padding-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: var(--font-xs);
}

/* Higher specificity than the global `p` rule (which sets the light-mode
   secondary color) so footer text stays legible against the dark footer bg. */
.footer-bottom,
.footer-bottom p {
  color: var(--color-dark-text-secondary);
}

.footer-contact-placeholder {
  color: var(--color-warning);
}