/* TEMA 1: VARIABLES Y MODO OSCURO/CLARO */
:root {
  --color-primary: #ffffff;
  --color-secondary-bg: #f3f4f6;
  --color-text: #1f2937;
  --color-text-secondary: #4b5563;
  --color-text-bold: #111827;
  --color-border: #d1d5db;
  --color-link: #2563eb;

  --color-accent-green-light: #16a34a;
  --color-accent-green-dark: #15803d;
  --color-accent-blue-light: #2563eb;
  --color-accent-blue-dark: #1d4ed8;
  --color-accent-purple-light: #9333ea;
  --color-accent-purple-dark: #7e22ce;
  
  --color-tip-bg: #fffbeb;
  --color-tip-border: #f59e0b;
  --color-rule-bg: #eff6ff;
  --color-rule-border: #3b82f6;

  --svg-rect-bg: #e5e7eb;
  --svg-text-title: #111827;
  --svg-text-label: #374151;
}

html.dark {
  --color-primary: #111827;
  --color-secondary-bg: #1f2937;
  --color-text: #e5e7eb;
  --color-text-secondary: #9ca3af;
  --color-text-bold: #ffffff;
  --color-border: #374151;
  --color-link: #60a5fa;

  --color-accent-green-light: #4ade80;
  --color-accent-green-dark: #22c55e;
  --color-accent-blue-light: #60a5fa;
  --color-accent-blue-dark: #3b82f6;
  --color-accent-purple-light: #c084fc;
  --color-accent-purple-dark: #a855f7;

  --color-tip-bg: #2d3748;
  --color-tip-border: #f59e0b;
  --color-rule-bg: #2d3748;
  --color-rule-border: #60a5fa;

  --svg-rect-bg: #374151;
  --svg-text-title: #ffffff;
  --svg-text-label: #e5e7eb;
}

/* TEMA 2: ESTILOS GLOBALES Y TIPOGRAFIA */
body {
  background-color: var(--color-primary);
  color: var(--color-text-secondary);
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  color: var(--color-text-bold);
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1.main-title {
  font-size: 2.5rem;
  color: var(--color-text-bold);
  text-align: center;
}

h2.section-title {
  font-size: 1.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

h3.subsection-title {
  font-size: 1.25rem;
  color: var(--color-text-bold);
}

h4.demo-title {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
}

a.text-link {
  color: var(--color-link);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--color-link);
  transition: all 0.2s ease;
}

a.text-link:hover {
  background-color: var(--color-link);
  color: var(--color-primary);
  border-bottom-color: transparent;
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}
li { margin-bottom: 0.5rem; }

/* TEMA 3: LAYOUT (CONTENEDOR) */
.container {
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
  padding: 2rem 1rem;
}

@media (min-width: 768px) {
  .container {
    padding: 4rem 1.5rem;
  }
  h1.main-title { font-size: 3rem; }
}

/* TEMA 4: BOTON THEME */
.theme-toggle-button {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 50;
  background-color: var(--color-secondary-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  padding: 0.75rem;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.theme-toggle-button:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.theme-toggle-button .w-6 { width: 1.5rem; }
.theme-toggle-button .h-6 { height: 1.5rem; }
.theme-toggle-button .hidden { display: none; }

.main-header {
  text-align: center;
  margin-bottom: 3rem;
}
.subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 42rem;
  margin: 1rem auto 0 auto;
}
.main-footer {
  text-align: center;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* TEMA 5: SECCIONES Y BLOQUES */
.content-wrapper {
  display: flex;
  flex-direction: column;
  gap: 3rem; 
}
.content-section {
  background-color: var(--color-secondary-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}
@media (min-width: 768px) {
  .content-section { padding: 2rem; }
}
html.dark .content-section:hover { border-color: var(--color-accent-blue-dark); }
html.light .content-section:hover { border-color: var(--color-accent-blue-light); }

code {
  background-color: var(--color-border);
  color: var(--color-text-bold);
  padding: 0.2em 0.4em;
  margin: 0 0.2em;
  font-size: 0.9em;
  border-radius: 4px;
  font-family: 'Courier New', Courier, monospace;
}

pre {
  background-color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}
pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
  margin: 0;
  font-size: 0.9rem;
}

/* CAJAS DE COMPARACION (BIEN VS MAL) */
.code-comparison {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1rem 0;
}
@media (min-width: 768px) {
  .code-comparison { flex-direction: row; }
}
.code-example-bad, .code-example-good {
  flex: 1;
  border-radius: 8px;
  padding: 1rem;
}
.code-label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.block { display: block; margin-bottom: 0.5rem; }

.code-example-bad { background-color: #fef2f2; border: 1px solid #fca5a5; color: #b91c1c; }
.code-example-bad .code-label { color: #dc2626; }
html.dark .code-example-bad { background-color: #3f2222; border-color: #7f1d1d; color: #fca5a5; }
html.dark .code-example-bad .code-label { color: #f87171; }

.code-example-good { background-color: #f0fdf4; border: 1px solid #86efac; color: #15803d; }
.code-example-good .code-label { color: #16a34a; }
html.dark .code-example-good { background-color: #223a2d; border-color: #22c55e; color: #bbf7d0; }
html.dark .code-example-good .code-label { color: #4ade80; }

/* CAJAS TIPS Y REGLAS */
.tip-box, .rule-box {
  padding: 1rem;
  border-radius: 8px;
  border-left-width: 4px;
  border-left-style: solid;
  margin: 1rem 0;
}
.tip-box { background-color: var(--color-tip-bg); border-color: var(--color-tip-border); }
.rule-box { background-color: var(--color-rule-bg); border-color: var(--color-rule-border); }

/* CAJA TERMINAL GIT */
.terminal-box {
  background-color: #1e1e1e;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1rem 0;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}
.terminal-box code {
  display: block;
  background-color: transparent;
  color: #4ade80;
  padding: 0;
  margin: 0.5rem 0;
}

/* DEMOS INTERACTIVAS */
.demo-box {
  background-color: var(--color-primary);
  border: 2px dashed var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1rem;
}
.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 150px;
}
.demo-item-flex {
  background-color: var(--color-accent-purple-dark);
  color: white;
  padding: 1.5rem;
  border-radius: 8px;
  font-weight: 700;
  font-family: 'Montserrat', sans-serif;
}

/* DEMO GRID */
.grid-demo {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
}
.demo-item-grid {
  background-color: var(--color-accent-green-dark);
  color: white;
  padding: 1rem;
  text-align: center;
  border-radius: 6px;
  font-weight: bold;
}

.demo-card-shadow {
  background-color: var(--color-secondary-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}
html.dark .demo-card-shadow { box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3); }

.demo-button {
  background-color: var(--color-accent-blue-dark);
  color: white;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}
.demo-button:hover {
  background-color: var(--color-accent-blue-light);
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

/* SVG HERO */
.hero-svg-container {
  width: 100%;
  max-width: 400px;
  margin: 0 auto 2rem auto;
}
.hero-svg-container svg { width: 100%; height: auto; }
.svg-rect-bg { fill: var(--svg-rect-bg); transition: fill 0.3s ease; }
.svg-accent-green { fill: var(--color-accent-green-dark); transition: fill 0.3s ease; }
.svg-accent-blue { fill: var(--color-accent-blue-dark); transition: fill 0.3s ease; }
.svg-accent-purple { fill: var(--color-accent-purple-dark); transition: fill 0.3s ease; }
.svg-text-title { fill: var(--svg-text-title); font-family: 'Montserrat', sans-serif; transition: fill 0.3s ease; }
.svg-text-label { fill: var(--svg-text-label); font-family: 'Inter', sans-serif; transition: fill 0.3s ease; }

/* UTILIDADES TEXTO */
.text-accent-green-light { color: var(--color-accent-green-light); }
.text-accent-blue-light { color: var(--color-accent-blue-light); }
.text-accent-purple-light { color: var(--color-accent-purple-light); }
.text-text-bold { color: var(--color-text-bold); }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.text-center { text-align: center; }

/* --- TABS (PESTANAS) --- */
.tabs-nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 1rem;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 8px;
}
.tab-btn:hover {
  background-color: var(--color-secondary-bg);
  color: var(--color-link);
}
.tab-btn.active {
  color: var(--color-primary);
  background-color: var(--color-accent-blue-dark);
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease-in-out;
}
.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- CARRUSEL --- */
.carousel-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}
.carousel-slides {
  width: 100%;
  max-width: 500px;
  overflow: hidden;
  position: relative;
  min-height: 200px;
}
.slide {
  display: none;
  width: 100%;
  animation: fadeIn 0.4s ease-in-out;
}
.slide.active-slide {
  display: block;
}
.carousel-btn {
  background-color: var(--color-accent-blue-dark);
  color: white;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: background-color 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.carousel-btn:hover {
  background-color: var(--color-accent-blue-light);
}