/* =========================
   VARIABLES / RESET / GLOBAL
   ========================= */

/* ********** Custom Properties ********** */
:root {
  /* Identidad visual */
  --primary-color: #3b82f6;
  --secondary-color: #1e3a8a;
  --accent-color: #f59e0b;

  /* Texto */
  --text-main: #1f2937;      /* títulos sobre fondo claro */
  --text-muted: #010203;     /* párrafos sobre fondo claro */
  --text-light: #555555;
  --text-white: #ffffff;     /* texto sobre fondos oscuros */
  --card-text-color: #0f0f0f;

  /* Dorado para títulos h1, h2, h3 */
  --gold-titles: #eeb90c;

  /* Fondos */
  --bg-main: #f3f4f6;
  --bg-surface: #ffffff;
  --bg-dark: #0d1b2e;            /* fondo general de la página */
  --bg-header-footer: #152a47;   /* header, footer y cards del blog */

  /* Bordes y estados */
  --border-color: #e5e7eb;
  --error: #ef4444;
  --success: #10b981;

  /* Variables servicios */
  --bg-color: #f0f0f0;
  --text-dark: #333333;
  --price-red: #d92d20;
  --price-green: #14804a;
  --card-bg: #ffffff;

  /* Layout */
  --max-width: 1200px;
  --header-height: 70px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);

  /* Planes */
  --gold-card: linear-gradient(135deg, #cf7016, #c27d07, #fbbf24, #ffd500, #ff9500);
  --shadow-gold:
    0 4px 15px rgba(212, 175, 55, 0.5),
    0 10px 25px rgba(255, 215, 0, 0.35),
    inset 0 0 8px rgba(255, 223, 0, 0.4);

  --diamond-card: linear-gradient(135deg, #1f2937, #4b5563, #94a3b8, #e2e8f0, #0f172a);
  --shadow-diamond:
    0 4px 15px rgba(113, 113, 122, 0.45),
    0 10px 30px rgba(255, 255, 255, 0.7),
    inset 0 0 10px rgba(255, 255, 255, 0.9);

  /* Redes sociales footer */
  --instagram: #E1306C;
  --whatsapp: #25D366;
  --tiktok: #00f2ea;

  /* ----- Blog dark (agregados para el tema oscuro) ----- */
  --blog-surface: #152a47;                 /* cards sobre fondo oscuro */
  --blog-border: rgba(255, 255, 255, 0.12); /* bordes sutiles en dark */
  --blog-text: rgba(255, 255, 255, 0.85);   /* texto de lectura en dark */
  --blog-text-soft: rgba(255, 255, 255, 0.65); /* texto secundario en dark */
  --radius: 12px;
}

/* ********** Reset y estilos base ********** */
html {
  box-sizing: border-box;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  scroll-behavior: smooth;
}

*, *::after, *::before {
  box-sizing: inherit;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-dark);
  color: var(--blog-text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* GLOBAL — 768px */
@media (min-width: 768px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* GLOBAL — 1024px */
@media (min-width: 1024px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* GLOBAL — 1440px */
@media (min-width: 1440px) {
  :root {
    --max-width: 1380px;
  }
}

/* =========================
   NAV SECTION (Modular & Pure CSS)
   ========================= */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: var(--bg-header-footer);
  border-bottom: 1px solid var(--blog-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  box-shadow: var(--shadow-sm);
}

.nav-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--gold-titles);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-menu {
  display: none;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  color: var(--text-white);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-menu a:hover {
  color: var(--gold-titles);
}

/* Pure CSS Mobile Menu Checkbox Hack */
.nav-toggle-input {
  display: none;
}

.nav-toggle-label {
  background: none;
  border: none;
  color: var(--text-white);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
}

.nav-toggle-input:checked ~ .nav-menu {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--bg-header-footer);
  padding: 1.5rem;
  border-bottom: 1px solid var(--blog-border);
  box-shadow: 0 10px 15px rgba(0,0,0,0.5);
}

.nav-toggle-input:checked ~ .nav-toggle-label .fa-bars::before {
  content: "\f00d"; /* FontAwesome Xmark */
}

/* NAV — 768px */
@media (min-width: 768px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* NAV — 1024px */
@media (min-width: 1024px) {
  .nav-toggle-label {
    display: none;
  }

  .nav-menu {
    display: flex;
  }
}

/* NAV — 1440px */
@media (min-width: 1440px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* =========================
   CABECERA (HERO) SECTION
   ========================= */

.article-hero {
  position: relative;
  background: linear-gradient(135deg, rgba(13, 27, 46, 0.85), rgba(21, 42, 71, 0.92)), 
              url('https://images.unsplash.com/photo-1555066931-4365d14bab8c?q=80&w=1920&auto=format&fit=crop') no-repeat center center/cover;
  padding: 4rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--blog-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 340px;
}

.article-hero-content {
  max-width: var(--max-width);
  z-index: 2;
}

.article-hero h1 {
  color: var(--gold-titles);
  font-size: 2.1rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.25;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  font-size: 0.95rem;
  color: var(--blog-text-soft);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.article-meta i {
  color: var(--primary-color);
}

/* CABECERA — 768px */
@media (min-width: 768px) {
  .article-hero h1 {
    font-size: 2.6rem;
  }
}

/* CABECERA — 1024px */
@media (min-width: 1024px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* CABECERA — 1440px */
@media (min-width: 1440px) {
  .article-hero h1 {
    font-size: 3.2rem;
  }
}

/* =========================
   CONTENT LAYOUT (MOBILE FIRST FLEXBOX)
   Order in Mobile: ÍNDICE -> ARTÍCULO -> COMPARTIR
   ========================= */

.content-layout-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* CONTENT LAYOUT — 768px */
@media (min-width: 768px) {
  .content-layout-container {
    padding: 2rem;
  }
}

/* CONTENT LAYOUT — 1024px */
@media (min-width: 1024px) {
  .content-layout-container {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 1.5rem;
    max-width: var(--max-width);
    margin: 2rem auto;
    padding: 0 1rem;
  }
}

/* CONTENT LAYOUT — 1440px */
@media (min-width: 1440px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* =========================
   ÍNDICE / SIDEBAR IZQUIERDA
   ========================= */

.sidebar-index {
  background-color: var(--blog-surface);
  border: 1px solid var(--blog-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  order: 1; /* Mobile order */
}

.sidebar-index h3 {
  color: var(--gold-titles);
  font-size: 1.15rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-index ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sidebar-index a {
  color: var(--blog-text-soft);
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  display: block;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
}

.sidebar-index a:hover {
  color: var(--text-white);
  background-color: rgba(59, 130, 246, 0.15);
  border-left: 3px solid var(--primary-color);
  padding-left: 0.75rem;
}

/* ÍNDICE — 768px */
@media (min-width: 768px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* ÍNDICE — 1024px */
@media (min-width: 1024px) {
  .sidebar-index {
    flex: 0 0 260px;
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    order: 1;
  }
}

/* ÍNDICE — 1440px */
@media (min-width: 1440px) {
  .sidebar-index {
    flex: 0 0 300px;
  }
}

/* =========================
   ARTÍCULO PRINCIPAL
   ========================= */

.main-article {
  background-color: var(--blog-surface);
  border: 1px solid var(--blog-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  order: 2; /* Mobile order */
  flex: 1;
}

.article-section {
  margin-bottom: 2.5rem;
}

.article-section:last-child {
  margin-bottom: 0;
}

.article-section h2 {
  color: var(--gold-titles);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  margin-top: 1.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--blog-border);
}

.article-section p {
  color: var(--blog-text);
  margin-bottom: 1rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.article-code-snippet {
  background-color: #080f1a;
  border: 1px solid var(--blog-border);
  border-radius: 8px;
  padding: 1rem;
  font-family: monospace;
  color: #38bdf8;
  font-size: 0.9rem;
  overflow-x: auto;
  margin: 1rem 0;
}

/* ARTÍCULO — 768px */
@media (min-width: 768px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* ARTÍCULO — 1024px */
@media (min-width: 1024px) {
  .main-article {
    flex: 1;
    padding: 2.5rem;
    order: 2;
  }
}

/* ARTÍCULO — 1440px */
@media (min-width: 1440px) {
  .main-article {
    padding: 3.5rem;
  }
}

/* =========================
   COMPARTIR
   ========================= */

.sidebar-share {
  background-color: var(--blog-surface);
  border: 1px solid var(--blog-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  order: 3; /* Mobile order */
}

.sidebar-share h3 {
  color: var(--gold-titles);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.share-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.share-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  text-decoration: none;
  font-size: 1.1rem;
  transition: transform 0.2s ease, opacity 0.2s ease;
  border: none;
  cursor: pointer;
}

.share-btn:hover {
  transform: translateY(-3px);
  opacity: 0.9;
}

.share-btn.twitter { background-color: #1da1f2; }
.share-btn.linkedin { background-color: #0a66c2; }
.share-btn.whatsapp { background-color: var(--whatsapp); }

/* COMPARTIR — 768px */
@media (min-width: 768px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* COMPARTIR — 1024px */
@media (min-width: 1024px) {
  .sidebar-share {
    flex: 0 0 220px;
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    order: 3;
  }
}

/* COMPARTIR — 1440px */
@media (min-width: 1440px) {
  .sidebar-share {
    flex: 0 0 260px;
  }
}

/* =========================
   CTA / CONTACTO
   ========================= */

.cta-section {
  background: linear-gradient(135deg, var(--secondary-color), var(--bg-header-footer));
  border: 1px solid var(--blog-border);
  border-radius: var(--radius);
  padding: 3rem 1.5rem;
  text-align: center;
  max-width: var(--max-width);
  margin: 2rem auto;
  box-shadow: var(--shadow-sm);
}

.cta-section h2 {
  color: var(--gold-titles);
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.cta-section p {
  color: var(--blog-text-soft);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.cta-btn {
  background-color: var(--accent-color);
  color: var(--card-text-color);
  font-weight: 700;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.2s ease, background-color 0.2s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.cta-btn:hover {
  transform: scale(1.05);
  background-color: #f7b731;
}

/* CTA — 768px */
@media (min-width: 768px) {
  .cta-section {
    margin: 3rem 2rem;
    padding: 3.5rem 2rem;
  }
}

/* CTA — 1024px */
@media (min-width: 1024px) {
  .cta-section {
    max-width: var(--max-width);
    margin: 3rem auto;
  }
}

/* CTA — 1440px */
@media (min-width: 1440px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* =========================
   FOOTER
   ========================= */

.site-footer {
  background-color: var(--bg-header-footer);
  border-top: 1px solid var(--blog-border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--blog-text-soft);
  font-size: 0.9rem;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.social-links {
  display: flex;
  gap: 1.25rem;
}

.social-links a {
  color: var(--text-white);
  font-size: 1.25rem;
  transition: color 0.2s ease;
}

.social-links a.ig:hover { color: var(--instagram); }
.social-links a.wa:hover { color: var(--whatsapp); }
.social-links a.tk:hover { color: var(--tiktok); }

/* FOOTER — 768px */
@media (min-width: 768px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* FOOTER — 1024px */
@media (min-width: 1024px) {
  /* Sin cambios específicos en este breakpoint. */
}

/* FOOTER — 1440px */
@media (min-width: 1440px) {
  /* Sin cambios específicos en este breakpoint. */
}