/* Tema claro (verde y blanco) y tema oscuro (negro y naranja). Sin CDNs. */

/* Valores base compartidos */
:root {
  --radius: 0.75rem;
  --max-width: 72rem;
  --font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  --transition-duration: 0.25s;
}

/* Tema claro: verde principal sobre blanco */
[data-theme="light"] {
  --color-bg: #ffffff;
  --color-bg-alt: #f0fdf4;
  --color-text: #14532d;
  --color-text-muted: #2f5139;
  --color-primary: #16a34a;
  --color-primary-dark: #15803d;
  --color-accent-soft: #dcfce7;
  --color-card: #ffffff;
  --color-border: #bbf7d0;
  --color-header: #ffffff;
  --color-hero-start: #f0fdf4;
  --color-hero-end: #dcfce7;
  --color-card-shadow: rgba(21, 128, 61, 0.12);
  --color-code-bg: #052e16;
  --color-code-text: #ecfdf5;
  --focus-color: #15803d;
}

/* Tema oscuro: naranja sobre negro */
[data-theme="dark"] {
  --color-bg: #0a0a0b;
  --color-bg-alt: #131316;
  --color-text: #fff7ed;
  --color-text-muted: #e7c9ab;
  --color-primary: #f97316;
  --color-primary-dark: #fb923c;
  --color-accent-soft: #431407;
  --color-card: #17171a;
  --color-border: #7c2d12;
  --color-header: #111114;
  --color-hero-start: #1c0f06;
  --color-hero-end: #431407;
  --color-card-shadow: rgba(249, 115, 22, 0.18);
  --color-code-bg: #000000;
  --color-code-text: #ffedd5;
  --focus-color: #fb923c;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition:
    background-color var(--transition-duration) ease,
    color var(--transition-duration) ease;
}

/* Contenedor central reutilizable */
.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Encabezado fijo con navegación */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: var(--color-header);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-duration) ease;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-block: 0.75rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-right: auto;
  color: inherit;
  text-decoration: none;
  font-weight: 700;
}

.brand-logo {
  border-radius: 0.5rem;
  background: var(--color-accent-soft);
}

.brand-sub {
  display: block;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
}

.site-nav a {
  color: inherit;
  text-decoration: none;
  padding: 0.35rem 0.5rem;
  border-radius: 0.5rem;
}

.site-nav a:hover {
  background-color: var(--color-accent-soft);
}

/* Botón de cambio de tema */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  border: 2px solid var(--color-primary);
  border-radius: 999px;
  background-color: transparent;
  color: inherit;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition:
    background-color var(--transition-duration) ease,
    color var(--transition-duration) ease,
    border-color var(--transition-duration) ease;
}

.theme-toggle:hover {
  background-color: var(--color-accent-soft);
}

/* Foco visible para teclado (accesibilidad) */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus-color);
  outline-offset: 2px;
}

/* Sección principal de presentación */
.hero {
  background: linear-gradient(135deg, var(--color-hero-start), var(--color-hero-end));
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  padding-block: 3.5rem;
  text-align: center;
}

.hero-kicker {
  margin: 0 0 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.15;
}

.hero-subtitle {
  max-width: 44rem;
  margin: 0 auto 1.75rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-note {
  margin: 1.25rem 0 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* Botones principales */
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 2px solid var(--color-primary);
  transition:
    background-color var(--transition-duration) ease,
    color var(--transition-duration) ease,
    transform var(--transition-duration) ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

[data-theme="dark"] .btn-primary {
  color: #0a0a0b;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn-secondary {
  background-color: transparent;
  color: inherit;
}

.btn-secondary:hover {
  background-color: var(--color-accent-soft);
}

/* Secciones de contenido */
.section[id] {
  scroll-margin-top: 5rem;
}

.section {
  padding-block: 3rem;
}

.section-alt {
  background-color: var(--color-bg-alt);
  border-block: 1px solid var(--color-border);
  transition: background-color var(--transition-duration) ease;
}

.section h2 {
  margin-top: 0;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
}

.section-lead {
  max-width: 48rem;
  color: var(--color-text-muted);
}

.grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* Tarjetas de contenido */
.card {
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--color-card), var(--color-bg-alt));
  box-shadow: 0 0.5rem 1.25rem var(--color-card-shadow);
  transition:
    background-color var(--transition-duration) ease,
    border-color var(--transition-duration) ease,
    transform var(--transition-duration) ease;
}

.card:hover {
  transform: translateY(-2px);
}

.card h3 {
  margin-top: 0;
}

.card p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

/* Requisitos e instalación */
.requirements {
  padding-left: 1.25rem;
}

.requirements li {
  margin-bottom: 0.35rem;
}

.steps {
  padding-left: 1.25rem;
}

.steps li {
  margin-bottom: 1.25rem;
}

.step-note {
  color: var(--color-text-muted);
}

/* Bloques de comandos */
pre {
  overflow-x: auto;
  padding: 0.9rem 1rem;
  border-radius: 0.625rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-code-bg);
  color: var(--color-code-text);
}

pre code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.95rem;
  padding: 0;
  border-radius: 0;
  background-color: transparent;
  color: inherit;
}

p code {
  padding: 0.1rem 0.35rem;
  border-radius: 0.375rem;
  background-color: var(--color-accent-soft);
  font-size: 0.95em;
}

/* Nota destacada y recursos */
.note {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  border-left: 0.3rem solid var(--color-primary);
  border-radius: 0 0.625rem 0.625rem 0;
  background-color: var(--color-card);
}

.note h3 {
  margin-top: 0;
}

.resource-list {
  padding-left: 1.25rem;
}

.resource-list li {
  margin-bottom: 0.6rem;
}

.resource-list a {
  color: var(--color-primary-dark);
  font-weight: 600;
}

/* Pie de página */
.site-footer {
  border-top: 1px solid var(--color-border);
  background-color: var(--color-header);
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-block: 1.25rem;
}

.footer-inner p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Diseño adaptable: una columna en pantallas pequeñas */
@media (max-width: 48rem) {
  html {
    scroll-padding-top: 8.5rem;
  }

  .section[id] {
    scroll-margin-top: 8rem;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .site-nav {
    order: 3;
    width: 100%;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding-block: 2.5rem;
  }
}

/* Respeta la preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}