/* ============================================================
   zelva-public.css — sistema de diseño compartido para las
   páginas estáticas servidas por Vercel (/university/*, /blog/*,
   /legal/*, /contacto/*) — refleja 1:1 los tokens y componentes
   del Webflow Landing y del Angular shell de zelvaevents.com.
   ============================================================ */

:root {
  /* Surfaces */
  --bg:             #0A0A0A;
  --bg-deep:        #050505;
  --bg-elev-1:      #121212;
  --bg-elev-2:      #181818;
  --bg-elev-3:      #1F1F1F;

  /* Foreground */
  --fg:             #FAFAFA;
  --fg-muted:       #A8A8A8;
  --fg-low:         #6E6E6E;
  --fg-faint:       #3A3A3A;

  /* Lines */
  --line:           #232323;
  --line-soft:      #1A1A1A;
  --line-strong:    #353535;

  /* Accent (mint) */
  --accent:         #3ECF8E;
  --accent-soft:    #2EB87A;
  --accent-deep:    #0F2A1E;
  --accent-glow:    rgba(62,207,142,0.22);

  /* Navbar */
  --nav-bg:         rgba(10,10,10,0.72);
  --nav-blur:       blur(14px) saturate(140%);

  /* Typography */
  --font-sans:      "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono:      "Geist Mono", ui-monospace, "JetBrains Mono", "SF Mono", Menlo, monospace;
  --font-display:   "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Radii */
  --r-bubble: 6px;
  --r-card:   18px;
  --r-hero:   28px;
  --r-pill:   999px;

  /* Motion */
  --ease-out:  cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur-hover: 200ms;
  --dur-state: 280ms;
}

/* ============================================================
   Reset & base
   ============================================================ */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
  touch-action: manipulation;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: var(--accent); color: var(--bg); }

a { color: inherit; text-decoration: none; transition: opacity var(--dur-hover) var(--ease-out); }
a:hover { opacity: 0.78; }

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

ul, ol { padding-left: 1.4em; margin: 0 0 1em; }
ul li, ol li { margin: 0.4em 0; color: var(--fg-muted); }

hr { border: 0; border-top: 1px solid var(--line); margin: 56px 0; }

/* ============================================================
   Layout primitives
   ============================================================ */
.zv-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px;
}

@media (max-width: 767px) {
  .zv-container { padding: 0 16px; }
}

.zv-article {
  max-width: 760px;
  margin: 0 auto;
  padding: 96px 28px 120px;
}

@media (max-width: 767px) {
  .zv-article { padding: 72px 20px 96px; }
}

/* ============================================================
   Typography defaults — coinciden con Webflow editorial dark
   ============================================================ */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--fg);
  margin: 0;
}

h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
}

h2 {
  font-size: clamp(26px, 3.2vw, 34px);
  line-height: 1.15;
  margin: 56px 0 16px;
}

h3 {
  font-size: clamp(19px, 2vw, 22px);
  font-weight: 600;
  line-height: 1.25;
  margin: 28px 0 12px;
}

h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 8px;
  color: var(--fg);
}

p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-muted);
  margin: 0 0 16px;
}

p strong, p b { color: var(--fg); font-weight: 600; }
p em, p i { color: var(--fg); font-style: italic; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-low);
  margin-bottom: 14px;
}

.lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--fg-muted);
  margin-bottom: 32px;
}

.meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-low);
}

article a,
.zv-article a,
.prose a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  transition: border-color var(--dur-hover) var(--ease-out), opacity var(--dur-hover) var(--ease-out);
}

article a:hover,
.zv-article a:hover,
.prose a:hover {
  border-bottom-color: var(--accent);
  opacity: 1;
}

/* ============================================================
   Botones
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  border-radius: var(--r-pill);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  transition:
    background-color var(--dur-hover) var(--ease-out),
    color var(--dur-hover) var(--ease-out),
    border-color var(--dur-hover) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg);
}
.btn--primary:hover {
  background: var(--accent-soft);
  color: var(--bg);
  opacity: 1;
}

.btn--ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line);
}
.btn--ghost:hover {
  background: var(--bg-elev-2);
  border-color: var(--line-strong);
  opacity: 1;
}

/* ============================================================
   Cards (article cards, university cards, etc.)
   ============================================================ */
.zv-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px;
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  transition:
    border-color var(--dur-hover) var(--ease-out),
    background-color var(--dur-hover) var(--ease-out);
  text-decoration: none;
  color: inherit;
}

.zv-card:hover {
  border-color: var(--line-strong);
  background: var(--bg-elev-2);
  opacity: 1;
}

.zv-card__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-low);
}

.zv-card__title {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 4px 0 0;
}

.zv-card__excerpt {
  font-size: 14px;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 4px 0 0;
}

.zv-card__meta {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-low);
}

.zv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

/* ============================================================
   NAVBAR (Webflow .zv-nav structure)
   ============================================================ */
.zv-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  background: var(--nav-bg);
  -webkit-backdrop-filter: var(--nav-blur);
  backdrop-filter: var(--nav-blur);
  border-bottom: 1px solid var(--line-soft);
}

.zv-nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  height: 72px;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}

.zv-nav-col { display: flex; align-items: center; }
.zv-nav-col--left { justify-content: flex-start; }
.zv-nav-col--right { justify-content: flex-end; gap: 8px; }

.zv-wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--fg);
}

.zv-wordmark-text {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 26px;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--fg);
}

.zv-nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.zv-nav-link {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--fg-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-hover) var(--ease-out);
}

.zv-nav-link:hover {
  color: var(--fg);
  opacity: 1;
}

.zv-nav-signin {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--fg-muted);
  background: transparent;
  padding: 8px 10px;
  text-decoration: none;
  transition: color var(--dur-hover) var(--ease-out);
  white-space: nowrap;
}

.zv-nav-signin:hover {
  color: var(--fg);
  opacity: 1;
}

.zv-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 16px;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color var(--dur-hover) var(--ease-out),
    color var(--dur-hover) var(--ease-out);
}

.zv-nav-cta:hover {
  background: var(--accent-soft);
  color: var(--bg);
  opacity: 1;
}

.zv-nav-burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-left: 4px;
  background: transparent;
  border: 0;
  color: var(--fg);
  cursor: pointer;
  border-radius: 8px;
  transition: background-color var(--dur-hover) var(--ease-out);
}

.zv-nav-burger:hover { background: var(--bg-elev-2); }

@media (max-width: 767px) {
  .zv-nav-inner {
    grid-template-columns: auto 1fr;
    height: 64px;
    padding: 0 16px;
    gap: 12px;
  }
  .zv-nav-links,
  .zv-nav-signin,
  .zv-nav-cta { display: none; }
  .zv-nav-col--right { justify-content: flex-end; }
  .zv-nav-burger { display: inline-flex; }
  .zv-wordmark-text { font-size: 22px; }
}

/* Mobile menu overlay (toggled with JS — see zv-mobile-menu) */
.zv-mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--bg);
  padding: 16px 20px 32px;
  display: none;
  flex-direction: column;
  animation: zv-fade-in 220ms var(--ease-out);
}

.zv-mobile-menu.is-open { display: flex; }
body.zv-mobile-locked { overflow: hidden; }

.zv-mobile-menu__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  margin-bottom: 12px;
}

.zv-mobile-menu__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 0;
  color: var(--fg);
  cursor: pointer;
  border-radius: 8px;
}

.zv-mobile-menu__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.zv-mobile-menu__list li { border-top: 1px solid var(--line); }
.zv-mobile-menu__list li:last-child { border-bottom: 1px solid var(--line); }

.zv-mobile-menu__link {
  display: block;
  padding: 22px 4px;
  font-family: var(--font-sans);
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.025em;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color var(--dur-hover) var(--ease-out);
}

.zv-mobile-menu__link:hover { color: var(--fg); opacity: 1; }

.zv-mobile-menu__ctas {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
}

.zv-mobile-menu__signin,
.zv-mobile-menu__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 18px;
  border-radius: var(--r-pill);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color var(--dur-hover) var(--ease-out), color var(--dur-hover) var(--ease-out);
}

.zv-mobile-menu__signin {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--fg);
}

.zv-mobile-menu__cta {
  background: var(--accent);
  color: var(--bg);
}

@keyframes zv-fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   FOOTER (Webflow .zv-footer structure)
   ============================================================ */
.zv-footer {
  border-top: 1px solid var(--line-soft);
  background: var(--bg);
  font-family: var(--font-sans);
  color: var(--fg);
  padding: 56px 24px 40px;
}

.zv-footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.zv-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.zv-footer-brand { display: flex; flex-direction: column; }

.zv-footer-apps {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.zv-footer-app {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--fg-muted);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--dur-hover) var(--ease-out), border-color var(--dur-hover) var(--ease-out), background-color var(--dur-hover) var(--ease-out);
}

.zv-footer-app:hover {
  color: var(--fg);
  border-color: var(--line-strong);
  background: var(--bg-elev-2);
  opacity: 1;
}

.zv-footer-col { display: flex; flex-direction: column; }

.zv-footer-heading {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-low);
  margin: 0 0 14px;
}

.zv-footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.zv-footer-link {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--fg-muted);
  text-decoration: none;
  transition: opacity var(--dur-hover) var(--ease-out), color var(--dur-hover) var(--ease-out);
}

.zv-footer-link:hover {
  color: var(--fg);
  opacity: 1;
}

.zv-footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

.zv-footer-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-low);
}

@media (max-width: 1023px) {
  .zv-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px 32px;
  }
  .zv-footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 767px) {
  .zv-footer { padding: 48px 20px 32px; }
  .zv-footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .zv-footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ============================================================
   Article-specific (university, blog, legal)
   ============================================================ */
.zv-article-hero {
  padding: 96px 0 32px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 56px;
}

.zv-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-low);
  margin-top: 20px;
}

.zv-article-meta > * { display: inline-flex; align-items: center; gap: 8px; }

.zv-article-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  margin: 32px 0;
}

.zv-callout {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-bubble);
  padding: 20px 24px;
  margin: 32px 0;
}

.zv-callout p:last-child { margin-bottom: 0; }