@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Sora:wght@600;700;800;900&display=swap");

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--ni-font-body);
  background: var(--ni-bg-deep);
  color: var(--ni-text);
  line-height: 1.65;
  min-height: 100vh;
}

/* Fondo tipo red / neón (solo CSS) */
.ni-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 90% 70% at 15% 10%, rgba(139, 92, 246, 0.28), transparent 55%),
    radial-gradient(ellipse 70% 60% at 85% 80%, rgba(59, 130, 246, 0.22), transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 50%, rgba(192, 38, 211, 0.12), transparent 60%),
    linear-gradient(168deg, #050510 0%, #0a0520 45%, #080818 100%);
}

.ni-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 75% 75% at 50% 30%, black 15%, transparent 70%);
}

/* Header */
.ni-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  min-height: var(--ni-header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 5%;
  z-index: 1000;
  background: rgba(5, 5, 16, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(138, 43, 226, 0.3);
}

.ni-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--ni-text);
}

/* Logo institucional (marca NÚCLEO INSTITUCIONAL + ícono SVG) */
.ni-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.ni-logo__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.ni-logo__icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.ni-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.ni-logo__name {
  font-family: var(--ni-font-display);
  color: #ffffff;
  font-size: clamp(1rem, 2.8vw, 1.35rem);
  font-weight: 800;
  letter-spacing: 0.12em;
}

.ni-logo__sub {
  font-family: var(--ni-font-body);
  color: #8a2be2;
  font-size: clamp(0.55rem, 1.6vw, 0.72rem);
  font-weight: 600;
  letter-spacing: 0.38em;
  margin-top: 4px;
  text-transform: uppercase;
}

.ni-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem 1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.ni-nav a {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ni-text-muted);
  text-decoration: none;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}

.ni-nav a:hover {
  color: var(--ni-text);
  background: rgba(139, 92, 246, 0.15);
}

.ni-nav a.ni-nav--personas {
  color: var(--ni-cyan);
  border: 1px solid rgba(34, 211, 238, 0.4);
}

.ni-nav a.ni-nav--personas:hover {
  background: rgba(34, 211, 238, 0.12);
}

.ni-nav a.ni-nav--cta {
  background: linear-gradient(135deg, var(--ni-violet), var(--ni-magenta));
  color: #fff;
  padding: 0.5rem 1.15rem;
  font-weight: 700;
  border-radius: 999px;
  border: none;
}

.ni-nav a.ni-nav--cta:hover {
  filter: brightness(1.08);
  color: #fff;
}

.ni-nav a.ni-nav--active {
  color: #fff;
  background: rgba(139, 92, 246, 0.3);
}

@media (max-width: 720px) {
  .ni-header {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .ni-nav {
    width: 100%;
    justify-content: flex-start;
    border-top: 1px solid rgba(139, 92, 246, 0.2);
    padding-top: 0.5rem;
  }
}

/* —— Landing institucional (hub) —— */
.ni-lp-hero {
  padding: clamp(3.5rem, 10vw, 6rem) 5% 3rem;
  text-align: center;
  background: radial-gradient(circle at top right, rgba(138, 43, 226, 0.15), transparent 55%);
}

.ni-lp-hero h1 {
  font-family: var(--ni-font-display);
  font-size: clamp(1.85rem, 5vw, 3rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  background: linear-gradient(to right, #fff, var(--ni-accent-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.ni-lp-lead {
  max-width: 42rem;
  margin: 0 auto 1.75rem;
  color: var(--ni-text-gray);
  font-size: 1.05rem;
}

.ni-btn-cta {
  display: inline-block;
  background: var(--ni-purple-brand);
  color: #fff;
  padding: 0.9rem 2rem;
  text-decoration: none;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  transition: transform 0.25s, box-shadow 0.25s;
  box-shadow: 0 0 20px rgba(138, 43, 226, 0.4);
}

.ni-btn-cta:hover {
  transform: scale(1.04);
  box-shadow: 0 0 32px rgba(138, 43, 226, 0.55);
  color: #fff;
}

.ni-segments {
  padding: 3rem 5% 2.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
}

.ni-segment-card {
  background: var(--ni-card-glass);
  padding: 2.25rem 1.75rem;
  border-radius: 20px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.3s, background 0.3s, transform 0.25s;
  display: block;
}

.ni-segment-card:hover {
  border-color: var(--ni-accent-blue);
  background: rgba(0, 212, 255, 0.06);
  transform: translateY(-4px);
}

.ni-segment-card--highlight {
  border-color: rgba(138, 43, 226, 0.55);
}

.ni-segment-card h3 {
  font-family: var(--ni-font-display);
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.65rem;
  color: #fff;
}

.ni-segment-card p {
  font-size: 0.95rem;
  color: var(--ni-text-gray);
  margin: 0;
}

.ni-section {
  padding: clamp(3rem, 8vw, 5rem) 5%;
  max-width: 1200px;
  margin: 0 auto;
}

.ni-section-title {
  text-align: center;
  margin-bottom: 2.5rem;
  font-family: var(--ni-font-display);
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 800;
  color: var(--ni-accent-blue);
}

.ni-grid-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1.75rem;
}

.ni-feature-item {
  background: rgba(255, 255, 255, 0.03);
  padding: 1.75rem;
  border-left: 4px solid var(--ni-purple-brand);
  border-radius: 0 10px 10px 0;
}

.ni-feature-item h4 {
  font-family: var(--ni-font-display);
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: #fff;
}

.ni-feature-item p {
  font-size: 0.92rem;
  color: var(--ni-text-gray);
  margin: 0;
}

.ni-faq-wrap {
  max-width: 720px;
  margin: 0 auto;
}

.ni-faq-item {
  margin-bottom: 1rem;
  background: var(--ni-card-glass);
  padding: 1.15rem 1.25rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.95rem;
  color: var(--ni-text-gray);
}

.ni-faq-item strong {
  color: #fff;
  display: block;
  margin-bottom: 0.35rem;
}

.ni-contact-block {
  padding: clamp(3rem, 8vw, 5rem) 5%;
  text-align: center;
  background: linear-gradient(to bottom, transparent, rgba(138, 43, 226, 0.1));
}

.ni-contact-block h2 {
  font-family: var(--ni-font-display);
  font-size: clamp(1.65rem, 4vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 0.75rem;
  color: #fff;
}

.ni-contact-block .ni-lp-lead {
  margin-bottom: 2rem;
}

#servicios,
#faq,
#contacto {
  scroll-margin-top: calc(var(--ni-header-h) + 0.85rem);
}

/* Footer corto */
.ni-footer {
  padding: 2rem 4% 3rem;
  border-top: 1px solid var(--ni-border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--ni-text-muted);
}

.ni-footer a {
  color: var(--ni-cyan);
  text-decoration: none;
  font-weight: 600;
}

.ni-footer a:hover {
  text-decoration: underline;
}

/* Página interior simple */
.ni-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 4% 4rem;
}

.ni-main h1 {
  font-family: var(--ni-font-display);
  font-size: 1.85rem;
  font-weight: 900;
  margin-bottom: 1rem;
}

.ni-main p {
  color: var(--ni-text-muted);
  margin-bottom: 1rem;
}

.ni-btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.75rem 1.35rem;
  background: linear-gradient(135deg, var(--ni-violet), var(--ni-blue));
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 8px;
}

.ni-btn:hover {
  filter: brightness(1.06);
}

/* Newsletter — ediciones (flipbook embebido) */
.ni-main--wide {
  max-width: min(1100px, 100%);
}

.ni-eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(135deg, rgba(88, 28, 135, 0.85), rgba(49, 46, 129, 0.75));
  border: 1px solid rgba(167, 139, 250, 0.45);
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.ni-edicion {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(138, 92, 246, 0.25);
}

.ni-edicion:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 1.25rem;
}

.ni-edicion h2 {
  font-family: var(--ni-font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.5rem;
}

.ni-edicion-meta {
  font-size: 0.9rem;
  color: var(--ni-text-gray);
  margin-bottom: 1.25rem;
}

.ni-edicion-subscribe {
  margin-top: 0.5rem;
  margin-bottom: 0;
  font-size: 0.95rem;
  color: var(--ni-text-muted);
}

.ni-flip-embed {
  position: relative;
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(139, 92, 246, 0.35);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
  background: #0c0c18;
  aspect-ratio: 900 / 637;
  min-height: 280px;
}

.ni-flip-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}