/* ==========================================================================
   Astro — sistema visual compartido (index.html + empezar.html)
   Editorial y minimalista: Inter, mucho espacio, bordes de 1px, una sola curva.
   ========================================================================== */

/* --------------------------------------------------------------------------
   TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Marca */
  --c-black: #030509;
  --c-ink: #0a0c10;
  --c-charcoal: #111318;
  --c-mint: #5FEAD4;
  --c-sky: #7EC8E3;
  --c-lavender: #B8C8F0;
  --c-gray: #8892A4;
  --c-mist: #E8ECF4;
  --c-paper: #ffffff;
  --c-paper-alt: #F4F5F7;
  --c-teal: #1F6B77;   /* menta llevada a contraste AA sobre fondos claros */
  --c-slate: #5B6474;  /* gris de marca llevado a contraste AA sobre fondos claros */

  /* Tema claro (por defecto) */
  --bg: var(--c-paper);
  --bg-alt: var(--c-paper-alt);
  --surface: var(--c-paper);
  --text: var(--c-ink);
  --text-2: rgba(10, 12, 16, 0.72);
  --text-3: var(--c-slate);
  --accent: var(--c-teal);
  --accent-soft: rgba(31, 107, 119, 0.06);
  --on-accent: #ffffff;
  --danger: #B42318;
  --border: rgba(10, 12, 16, 0.08);
  --border-strong: rgba(10, 12, 16, 0.16);
  --nav-bg: rgba(255, 255, 255, 0.8);
  --menu-bg: rgba(255, 255, 255, 0.97);
  --btn-bg: var(--c-ink);
  --btn-fg: #ffffff;
  --logo-filter: invert(1);
  color-scheme: light;

  /* Tipografía — solo Inter */
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --fs-display: clamp(2.5rem, 1.25rem + 5.2vw, 5rem);
  --fs-h2: clamp(2rem, 1.25rem + 2.6vw, 3rem);
  --fs-h3: clamp(1.75rem, 1.25rem + 1.8vw, 2.5rem);
  --fs-lg: 1.25rem;
  --fs-body: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --fs-md: 0.9375rem;
  --fs-sm: 0.875rem;
  --fs-xs: 0.75rem;
  --tracking-tight: -0.03em;
  --tracking-label: 0.16em;

  /* Espaciado — base 8px */
  --s-1: 8px;
  --s-2: 16px;
  --s-3: 24px;
  --s-4: 32px;
  --s-5: 40px;
  --s-6: 48px;
  --s-8: 64px;
  --s-12: 96px;
  --s-16: 128px;
  --container: 1120px;
  --gutter: 40px;
  --section-y: clamp(96px, 6rem + 4vw, 160px);
  --nav-h: 80px;

  /* Forma y movimiento */
  --radius: 16px;
  --radius-sm: 12px;
  --radius-pill: 75px;
  --ease: cubic-bezier(0.19, 1, 0.22, 1);
  --dur: 600ms;
  --dur-fast: 300ms;
}

/* Tema oscuro. .on-dark aplica los mismos valores a zonas siempre oscuras (hero, nav sobre el hero). */
:root[data-theme="dark"],
.on-dark {
  --bg: var(--c-ink);
  --bg-alt: var(--c-charcoal);
  --surface: var(--c-charcoal);
  --text: var(--c-mist);
  --text-2: rgba(232, 236, 244, 0.72);
  --text-3: var(--c-gray);
  --accent: var(--c-mint);
  --accent-soft: rgba(95, 234, 212, 0.08);
  --on-accent: var(--c-black);
  --danger: #F97066;
  --border: rgba(232, 236, 244, 0.08);
  --border-strong: rgba(232, 236, 244, 0.16);
  --nav-bg: rgba(10, 12, 16, 0.72);
  --menu-bg: rgba(10, 12, 16, 0.97);
  --btn-bg: var(--c-mist);
  --btn-fg: var(--c-black);
  --logo-filter: none;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  min-height: 100vh;
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

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

ul {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

[hidden] {
  display: none !important;
}

/* --------------------------------------------------------------------------
   UTILIDADES
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.divider {
  display: block;
  width: calc(100% - 2 * var(--gutter));
  max-width: var(--container);
  height: 1px;
  margin: 0 auto;
  border: 0;
  background: var(--border);
}

/* Label pequeño en mayúsculas */
.eyebrow,
.label {
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-3);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  margin-bottom: var(--s-3);
}

.eyebrow::before {
  content: "";
  width: var(--s-3);
  height: 1px;
  background: var(--accent);
}

/* --------------------------------------------------------------------------
   BOTONES — pill, primario y secundario
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-1);
  min-height: 48px;
  padding: 0 var(--s-3);
  font-size: var(--fs-md);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
  text-align: center;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  transition:
    background-color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.btn svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  transition: transform var(--dur-fast) var(--ease);
}

.btn:hover svg {
  transform: translateX(4px);
}

.btn-primary {
  background: var(--btn-bg);
  color: var(--btn-fg);
}

.btn-primary:hover {
  background: var(--c-mint);
  color: var(--c-black);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  border-color: var(--text);
}

.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   TARJETA
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--s-4);
}

/* Nota con título (precios y formulario) */
.pricing-note-box {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--s-3);
}

.pricing-note-box-title {
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: var(--s-1);
}

.pricing-note-box p:not(.pricing-note-box-title) {
  font-size: var(--fs-sm);
  color: var(--text-2);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   NAVEGACIÓN
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--s-2) 0;
  color: var(--text);
  border-bottom: 1px solid transparent;
  transition:
    opacity var(--dur) var(--ease),
    background-color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.nav.is-scrolled {
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom-color: var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  line-height: 0;
  flex-shrink: 0;
}

.nav-logo {
  min-width: 40px;
  min-height: 40px;
}

.nav-logo-img {
  display: block;
  height: 28px;
  width: auto;
  aspect-ratio: 243 / 225;
  filter: var(--logo-filter);
  transition: filter var(--dur-fast) var(--ease);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--s-4);
}

.nav-link {
  position: relative;
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--text-2);
  padding: var(--s-1) 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-fast) var(--ease);
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--text);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--s-1);
}

.nav-cta {
  min-height: 40px;
  padding: 0 var(--s-3);
  font-size: var(--fs-sm);
}

.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  color: var(--text-2);
  border: 1px solid var(--border-strong);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--text);
}

.theme-toggle svg {
  position: absolute;
  width: 16px;
  height: 16px;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease);
}

.theme-toggle .icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.6); }
.theme-toggle .icon-moon { opacity: 1; transform: rotate(0) scale(1); }
:root[data-theme="dark"] .theme-toggle .icon-sun { opacity: 1; transform: rotate(0) scale(1); }
:root[data-theme="dark"] .theme-toggle .icon-moon { opacity: 0; transform: rotate(90deg) scale(0.6); }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
}

.nav-toggle-icon {
  position: relative;
  width: 20px;
  height: 14px;
}

.nav-toggle-icon span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}

.nav-toggle-icon span:nth-child(1) { top: 0; }
.nav-toggle-icon span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.nav-toggle-icon span:nth-child(3) { bottom: 0; }
.nav-toggle.is-open .nav-toggle-icon span:nth-child(1) { top: 50%; transform: translateY(-50%) rotate(45deg); }
.nav-toggle.is-open .nav-toggle-icon span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open .nav-toggle-icon span:nth-child(3) { bottom: 50%; transform: translateY(50%) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
  padding: var(--s-3) var(--gutter);
  background: var(--menu-bg);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease), visibility 0s linear var(--dur-fast);
}

.mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease), visibility 0s;
}

.mobile-menu a:not(.btn) {
  padding: var(--s-2) 0;
  font-size: 1rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.mobile-menu .btn {
  margin-top: var(--s-2);
  align-self: flex-start;
}

/* --------------------------------------------------------------------------
   FOOTER
   -------------------------------------------------------------------------- */
.footer {
  padding: var(--s-12) 0 var(--s-6);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--s-4);
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 280px;
}

.footer-tagline {
  margin-top: var(--s-2);
  font-size: var(--fs-sm);
  color: var(--text-3);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: var(--s-6);
  flex-wrap: wrap;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
}

.footer-col-title {
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: var(--s-1);
}

.footer-col a {
  font-size: var(--fs-md);
  color: var(--text-2);
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  margin-top: var(--s-6);
  padding-top: var(--s-3);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: var(--fs-sm);
  color: var(--text-3);
}

.footer-social {
  display: flex;
  gap: var(--s-1);
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-strong);
  color: var(--text-2);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.footer-social a:hover {
  color: var(--text);
  border-color: var(--text);
}

.footer-social svg {
  width: 16px;
  height: 16px;
}

/* --------------------------------------------------------------------------
   RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 1199px) {
  :root { --gutter: 24px; }
}

@media (max-width: 900px) {
  .nav-links,
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
}

@media (max-width: 809px) {
  :root { --nav-h: 72px; }
  .nav-logo-img { height: 24px; }
  .footer-inner { flex-direction: column; }
  .footer-links { gap: var(--s-4); }
}

/* --------------------------------------------------------------------------
   MOVIMIENTO REDUCIDO
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}