/* ============================================================
   EDULAB · Sistema de diseño base
   Paleta heredada del proyecto original:
   indigo #333369 · morado #6a4c93 / #311355 · lila #9754b2
   dorado #d2b80e · azul #007BFF / #002a64 · whitesmoke
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Fondos */
  --bg-900: #08081a;
  --bg-800: #0d0d1f;
  --bg-700: #141430;
  --bg-600: #1c1c40;

  /* Marca */
  --purple: #6a4c93;
  --purple-dark: #311355;
  --purple-light: #a06cd5;
  --gold: #e8c547;
  --blue: #007bff;
  --navy: #002a64;
  --brand-cyan: #20e4da;

  /* Superficies claras */
  --surface: #ffffff;
  --surface-2: #f5f5f5;
  --surface-3: #ebebf3;

  /* Texto */
  --text: #f0f0f5;
  --text-soft: rgba(255, 255, 255, 0.68);
  --text-dim: rgba(255, 255, 255, 0.42);
  --text-dark: #23234a;
  --text-dark-soft: #5a5a7a;

  /* Cristal */
  --glass: rgba(255, 255, 255, 0.04);
  --glass-strong: rgba(255, 255, 255, 0.07);
  --stroke: rgba(255, 255, 255, 0.08);
  --stroke-strong: rgba(255, 255, 255, 0.14);

  /* Formas */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-full: 999px;

  /* Sombras */
  --sh-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --sh-md: 0 8px 28px rgba(0, 0, 0, 0.45);
  --sh-lg: 0 20px 55px rgba(0, 0, 0, 0.55);
  --glow: 0 4px 18px rgba(120, 80, 180, 0.32);

  /* Gradientes */
  --grad-brand: linear-gradient(135deg, #7b4fbf 0%, #5c36a0 100%);
  --grad-gold: linear-gradient(135deg, #f0d84a 0%, #d4a800 100%);
  --grad-text: linear-gradient(100deg, #ffffff 0%, #d9cbff 45%, #e8c547 100%);

  --nav-h: 68px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: 'Inter', 'Roboto Condensed', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg-800);
  background-image:
    radial-gradient(900px 500px at 10% -6%, rgba(120, 60, 180, 0.18), transparent 60%),
    radial-gradient(700px 450px at 90% 2%, rgba(0, 100, 220, 0.10), transparent 58%),
    radial-gradient(600px 500px at 75% 100%, rgba(232, 197, 71, 0.06), transparent 60%),
    linear-gradient(180deg, var(--bg-700) 0%, var(--bg-800) 50%, var(--bg-900) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5 {
  font-family: 'Outfit', 'Inter', sans-serif;
  line-height: 1.15;
  font-weight: 700;
}

ul,
ol {
  list-style: none;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

::selection {
  background-color: var(--purple-light);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.18);
}

::-webkit-scrollbar-thumb {
  background: rgba(151, 84, 178, 0.55);
  border-radius: var(--r-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(151, 84, 178, 0.8);
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 6px;
}

.shell {
  width: min(1200px, 100% - 40px);
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ================= NAVBAR ================= */
.nav {
  --gold: var(--brand-cyan);
  --stroke: rgba(32, 228, 218, 0.16);
  --grad-brand: linear-gradient(135deg, #20e4da, #08b8c4);
  --glow: 0 4px 18px rgba(8, 184, 196, 0.18);
  position: sticky;
  top: 0;
  z-index: 900;
  background: rgba(5, 14, 18, 0.94);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--stroke);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.nav.is-stuck {
  background: rgba(3, 10, 14, 0.98);
  box-shadow: var(--sh-md);
}

.nav__inner {
  min-height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
}

.brand__img {
  height: 42px;
  width: 42px;
  object-fit: contain;
  border-radius: 10px;
  flex-shrink: 0;
  transition: transform 0.5s var(--ease);
}

.brand:hover .brand__img {
  transform: rotate(-6deg) scale(1.07);
}

.brand__name {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: #fff;
}

.brand__name span {
  color: var(--brand-cyan);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__link {
  padding: 9px 14px;
  border-radius: var(--r-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: color 0.25s ease, background 0.25s ease;
}

.nav__link:hover {
  color: var(--brand-cyan);
  background: rgba(32, 228, 218, 0.08);
}

.nav :focus-visible {
  outline-color: var(--brand-cyan);
}

.nav .btn--primary {
  color: #031619;
  border-color: rgba(32, 228, 218, 0.3);
}

.nav .btn--primary:hover {
  box-shadow: 0 6px 24px rgba(8, 184, 196, 0.3);
}

.nav .btn--ghost:hover,
.nav__burger:hover {
  border-color: rgba(32, 228, 218, 0.45);
  background: rgba(32, 228, 218, 0.08);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav__burger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke);
  background: var(--glass);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav__burger span {
  display: block;
  width: 19px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: transform 0.3s var(--ease), opacity 0.2s ease;
}

.nav__burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__burger.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ================= BOTONES ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 24px;
  border-radius: var(--r-md);
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  transition: filter 0.25s ease, box-shadow 0.25s ease,
    background 0.25s ease, border-color 0.25s ease, opacity 0.2s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn i {
  font-size: 1.15em;
}

.btn--primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: var(--glow);
  border: 1px solid rgba(160, 108, 213, 0.25);
}

.btn--primary:hover {
  filter: brightness(1.15);
  box-shadow: 0 6px 24px rgba(120, 80, 180, 0.45);
}

.btn--gold {
  background: var(--grad-gold);
  color: #1a1400;
  box-shadow: 0 4px 16px rgba(232, 197, 71, 0.25);
  border: 1px solid rgba(232, 197, 71, 0.15);
}

.btn--gold:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 22px rgba(232, 197, 71, 0.38);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
  border-color: var(--stroke-strong);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.28);
}

.btn--sm {
  padding: 9px 18px;
  font-size: 0.86rem;
}

.btn--lg {
  padding: 15px 32px;
  font-size: 1.04rem;
}

.btn--block {
  width: 100%;
}

.btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
  filter: none;
}

/* ================= PIEZAS COMUNES ================= */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--stroke);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  color: var(--text-soft);
}

.pill i {
  color: var(--gold);
  font-size: 1rem;
}

.card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--stroke);
  border-radius: var(--r-lg);
  padding: 26px;
  transition: transform 0.3s var(--ease), border-color 0.3s ease, background 0.3s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--stroke-strong);
  background: rgba(255, 255, 255, 0.055);
}

.section {
  padding: 92px 0;
}

.section__head {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 52px;
}

.section__title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.8px;
  margin-bottom: 14px;
}

.section__sub {
  color: var(--text-soft);
  font-size: 1.02rem;
}

.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ================= FOOTER ================= */
body > main { flex: 1 0 auto; }

.footer {
  margin-top: auto;
  border-top: 1px solid var(--stroke);
  padding: 52px 0 30px;
  background: rgba(6, 6, 18, 0.6);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 34px;
}

.footer__about {
  color: var(--text-soft);
  font-size: 0.92rem;
  max-width: 340px;
  margin-top: 14px;
}

.footer__title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--gold);
  margin-bottom: 14px;
}

.footer__list li {
  margin-bottom: 9px;
}

.footer__list a {
  color: var(--text-soft);
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

.footer__list a:hover {
  color: #fff;
}

.footer__bottom {
  border-top: 1px solid var(--stroke);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 0.84rem;
}

/* ================= ANIMACIONES ================= */
@keyframes floatY {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-14px);
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(26px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0% {
    background-position: -180% 0;
  }

  100% {
    background-position: 180% 0;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulseGlow {

  0%,
  100% {
    opacity: 0.55;
  }

  50% {
    opacity: 1;
  }
}

/* El estado oculto sólo se aplica si el JS está activo, para que la página
   siga siendo legible aunque el script no cargue. */
.has-js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.has-js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }

  .has-js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ================= RESPONSIVE NAV ================= */
@media (max-width: 900px) {
  .shell {
    width: min(1200px, 100% - 28px);
  }

  .nav__burger {
    display: flex;
  }

  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 20px 24px;
    background: rgba(5, 14, 18, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--stroke);
    transform: translateY(-130%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s var(--ease), opacity 0.3s ease;
  }

  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__link {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: var(--r-md);
  }

  .nav__actions .btn--nav-cta {
    display: none;
  }

  .section {
    padding: 66px 0;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}