/* ============================================================
   Mejía Estudios — main.css
   ÚNICO archivo CSS del sitio.
   Prohibido CSS inline o <style> en el HTML.
   ============================================================ */

:root {
  --color-bg: #ffffff;
  --color-surface: #f5f6f8;
  --color-text: #1c2430;
  --color-muted: #5b6472;
  --color-primary: #14467c;
  --color-primary-dark: #0d3258;
  --color-accent: #c98a2b;
  --color-border: #dde2e9;

  --font-base: "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;

  --container-width: 72rem;
  --radius: 0.5rem;
}

/* ------------------------------------------------------------
   Base
   ------------------------------------------------------------ */

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 var(--space-sm);
}

p {
  margin: 0 0 var(--space-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
}

/* ------------------------------------------------------------
   Header
   ------------------------------------------------------------ */

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-block: var(--space-sm);
  flex-wrap: wrap;
}

.site-header__brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-nav__list {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.site-nav__link {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  color: var(--color-text);
  font-weight: 500;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  background-color: var(--color-surface);
  text-decoration: none;
}

.site-nav__link--active {
  color: var(--color-primary);
  font-weight: 700;
}

/* ------------------------------------------------------------
   Breadcrumbs
   ------------------------------------------------------------ */

.breadcrumbs {
  padding-block: var(--space-sm);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  font-size: 0.9rem;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: var(--space-xs);
  color: var(--color-muted);
}

.breadcrumbs__current {
  color: var(--color-muted);
}

/* ------------------------------------------------------------
   Hero
   ------------------------------------------------------------ */

.hero {
  padding-block: var(--space-lg);
  background-color: var(--color-surface);
}

.hero__headline {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  max-width: 22ch;
}

.hero__subheadline {
  font-size: 1.2rem;
  color: var(--color-muted);
  max-width: 60ch;
}

.hero__date {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-xs);
}

/* ------------------------------------------------------------
   Blog
   ------------------------------------------------------------ */

.post-list {
  display: grid;
  gap: var(--space-md);
}

.post-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
}

.post-card__date {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin-bottom: var(--space-xs);
}

.post-card__title {
  font-size: 1.3rem;
  margin-bottom: var(--space-xs);
}

.post-card__excerpt {
  color: var(--color-muted);
  max-width: 70ch;
}

.post-card__link {
  font-weight: 700;
}

/* ------------------------------------------------------------
   Sections
   ------------------------------------------------------------ */

.section {
  padding-block: var(--space-md);
}

.section:nth-of-type(even) {
  background-color: var(--color-surface);
}

.section__heading {
  font-size: 1.5rem;
  color: var(--color-primary-dark);
}

.section__paragraph {
  max-width: 70ch;
}

/* ------------------------------------------------------------
   CTA
   ------------------------------------------------------------ */

.cta {
  padding-block: var(--space-lg);
  text-align: center;
  background-color: var(--color-primary-dark);
  color: #ffffff;
}

.cta__headline {
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: #ffffff;
}

.cta__text {
  color: #d7e1ee;
  max-width: 60ch;
  margin-inline: auto;
}

.button {
  display: inline-block;
  margin-top: var(--space-sm);
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1.05rem;
}

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

.button--primary:hover,
.button--primary:focus-visible {
  background-color: var(--color-primary);
  text-decoration: none;
}

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */

.site-footer {
  background-color: var(--color-text);
  color: #cfd6df;
  padding-block: var(--space-md);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-md);
}

.site-footer__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.site-footer__link {
  color: #cfd6df;
}

.site-footer__link:hover,
.site-footer__link:focus-visible {
  color: #ffffff;
}

.site-footer__contact p {
  margin-bottom: var(--space-xs);
}

.site-footer__whatsapp a {
  color: var(--color-accent);
  font-weight: 700;
}

.site-footer__legal {
  font-size: 0.85rem;
  color: #9aa4b1;
  margin-bottom: 0;
}

/* ------------------------------------------------------------
   Responsive
   ------------------------------------------------------------ */

@media (max-width: 48rem) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-block: var(--space-md);
  }
}