:root {
  --uba-navy: #1b2c54;
  --uba-blue: #3984c4;
  --uba-cyan: #00c2ff;
  --uba-dark: #071426;
  --uba-text: #1f2937;
  --uba-muted: #6b7280;
  --uba-light: #f5f8fc;
  --white: #ffffff;

  --radius-sm: 14px;
  --radius-md: 22px;
  --radius-lg: 34px;

  --shadow-soft: 0 20px 60px rgba(7, 20, 38, 0.16);
  --shadow-strong: 0 30px 90px rgba(7, 20, 38, 0.35);

  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--uba-text);
  background: var(--white);
}

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

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

.container {
  width: min(100% - 40px, var(--container));
  margin: 0 auto;
}

/* Header */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  background: rgba(7, 20, 38, 0.62);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.navbar {
  width: min(100% - 40px, var(--container));
  margin: 0 auto;
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand img {
  width: 46px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(255,255,255,0.88);
  font-size: 0.95rem;
}

.nav-links a {
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-links a:hover {
  color: var(--white);
}

.nav-cta {
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--white) !important;
  background: linear-gradient(135deg, var(--uba-blue), var(--uba-cyan));
  box-shadow: 0 10px 30px rgba(0, 194, 255, 0.24);
}

.nav-login {
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--white) !important;
  border: 1px solid rgba(255,255,255,0.28);
  background: rgba(255,255,255,0.06);
}

.nav-login:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.48);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 2px;
  margin: 7px 0;
  background: var(--white);
  border-radius: 999px;
}

/* Hero */

.hero {
  min-height: 100vh;
  display: grid;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(120deg, rgba(7,20,38,0.88), rgba(27,44,84,0.70), rgba(0,194,255,0.18)),
    url("https://ubamultimodal.com/img/foto_4.jpg") center / cover no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -20% auto;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,194,255,0.35), transparent 70%);
  filter: blur(20px);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, black, transparent 88%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(100% - 40px, var(--container));
  margin: 0 auto;
  padding-top: 90px;
  color: var(--white);
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--uba-cyan);
  font-weight: 800;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.hero h1 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(3rem, 7vw, 6.9rem);
  line-height: 0.92;
  letter-spacing: -0.07em;
}

.hero p {
  max-width: 720px;
  margin: 28px 0 0;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.7;
  color: rgba(255,255,255,0.86);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 800;
}

.btn-primary {
  color: var(--uba-dark);
  background: var(--white);
}

.btn-secondary {
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.34);
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(12px);
}

.btn-secondary-dark {
  color: var(--uba-navy);
  background: var(--white);
  border: 1px solid rgba(27,44,84,0.16);
  box-shadow: 0 12px 32px rgba(7,20,38,0.08);
}

/* Sections */

section {
  padding: 105px 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 48px;
}

.section-heading.centered {
  margin-inline: auto;
  text-align: center;
}

.section-heading h2,
.trust-grid h2,
.video-copy h2,
.campus-copy h2,
.final-cta h2 {
  margin: 0;
  font-size: clamp(2.2rem, 4.4vw, 4.3rem);
  line-height: 1;
  letter-spacing: -0.055em;
  color: var(--uba-dark);
}

.section-heading p,
.video-copy p,
.campus-copy p,
.final-cta p {
  margin: 20px 0 0;
  color: var(--uba-muted);
  font-size: 1.08rem;
  line-height: 1.75;
}

/* Trust */

.trust-section {
  background: var(--uba-light);
}

.trust-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 42px;
  align-items: start;
}

.trust-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.trust-cards article,
.step-card,
.program-card,
.differentials-grid article {
  background: var(--white);
  border: 1px solid rgba(27,44,84,0.10);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: 0 18px 48px rgba(7,20,38,0.06);
}

.trust-cards strong {
  display: block;
  color: var(--uba-navy);
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.trust-cards p {
  margin: 0;
  color: var(--uba-muted);
  line-height: 1.65;
}

/* Model */

.model-section {
  background: var(--uba-dark);
}

.model-section .section-heading h2 {
  color: var(--white);
}

.model-section .section-heading p {
  color: rgba(255,255,255,0.72);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.12);
  color: var(--white);
  box-shadow: none;
}

.step-card span {
  display: inline-flex;
  margin-bottom: 48px;
  color: var(--uba-cyan);
  font-size: 0.9rem;
  font-weight: 900;
}

.step-card h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.step-card p {
  margin: 0;
  color: rgba(255,255,255,0.70);
  line-height: 1.7;
}

/* Campus */

.campus-section {
  background: var(--white);
}

.campus-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.campus-image img {
  height: 610px;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.feature-list {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.feature-list div {
  padding: 20px;
  border-radius: var(--radius-sm);
  background: var(--uba-light);
  border-left: 5px solid var(--uba-cyan);
}

.feature-list strong {
  display: block;
  margin-bottom: 5px;
  color: var(--uba-navy);
}

.feature-list span {
  color: var(--uba-muted);
}

/* Courses - Moodle */

.courses-section {
  background:
    radial-gradient(circle at top left, rgba(0,194,255,0.14), transparent 34%),
    radial-gradient(circle at bottom right, rgba(57,132,196,0.12), transparent 34%),
    var(--uba-light);
}

.courses-video-bg {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.courses-bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  z-index: -3;
  pointer-events: none;
}

.courses-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(245,248,252,0.96), rgba(245,248,252,0.88)),
    radial-gradient(circle at top left, rgba(0,194,255,0.18), transparent 36%);
  z-index: -2;
  pointer-events: none;
}

.courses-content {
  position: relative;
  z-index: 1;
}

.courses-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin: -18px 0 42px;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.course-card {
  background: var(--white);
  border: 1px solid rgba(27,44,84,0.10);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(7,20,38,0.08);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.course-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,194,255,0.28);
  box-shadow: 0 26px 70px rgba(7,20,38,0.14);
}

.course-card-image {
  height: 190px;
  background:
    linear-gradient(135deg, rgba(27,44,84,0.95), rgba(57,132,196,0.85)),
    url("https://ubamultimodal.com/img/foto_4.jpg") center / cover no-repeat;
  overflow: hidden;
}

.course-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.course-card:hover .course-card-image img {
  transform: scale(1.05);
}

.course-card-body {
  padding: 24px;
}

.course-card small {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--uba-blue);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
}

.course-card h3 {
  margin: 0 0 12px;
  color: var(--uba-dark);
  font-size: 1.25rem;
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.course-card p {
  margin: 0 0 20px;
  color: var(--uba-muted);
  line-height: 1.65;
}

.course-card a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--white);
  font-weight: 900;
  background: linear-gradient(135deg, var(--uba-blue), var(--uba-cyan));
  box-shadow: 0 12px 30px rgba(0,194,255,0.20);
}

.courses-loading,
.courses-error {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--uba-muted);
  background: var(--white);
  border: 1px solid rgba(27,44,84,0.10);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: 0 14px 36px rgba(7,20,38,0.06);
}

/* Programs */

.programs-section {
  background: var(--uba-light);
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.program-card {
  min-height: 280px;
  display: flex;
  flex-direction: column;
}

.program-card.featured {
  color: var(--white);
  background: linear-gradient(145deg, var(--uba-navy), var(--uba-blue));
}

.program-card h3 {
  margin: 0 0 14px;
  font-size: 1.35rem;
}

.program-card p {
  margin: 0;
  color: var(--uba-muted);
  line-height: 1.7;
}

.program-card.featured p {
  color: rgba(255,255,255,0.78);
}

.program-card a {
  margin-top: auto;
  font-weight: 900;
  color: var(--uba-blue);
}

.program-card.featured a {
  color: var(--white);
}

/* Gallery */

.gallery-section {
  background: var(--white);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 230px;
  gap: 16px;
}

.gallery-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: 0 16px 40px rgba(7,20,38,0.08);
}

.gallery-grid .large {
  grid-column: span 2;
  grid-row: span 2;
}

/* Differentials */

.differentials-section {
  background:
    linear-gradient(135deg, rgba(27,44,84,0.96), rgba(7,20,38,0.96)),
    url("https://ubamultimodal.com/img/foto_7_nueva.jpg") center / cover fixed;
}

.differentials-section .section-heading h2 {
  color: var(--white);
}

.differentials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.differentials-grid article {
  color: var(--white);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.13);
  box-shadow: none;
  backdrop-filter: blur(14px);
}

.differentials-grid h3 {
  margin: 0 0 12px;
}

.differentials-grid p {
  margin: 0;
  color: rgba(255,255,255,0.70);
  line-height: 1.7;
}

/* CTA */

.final-cta {
  background:
    radial-gradient(circle at top right, rgba(0,194,255,0.22), transparent 35%),
    var(--uba-light);
}

.final-cta-box {
  padding: 62px;
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-soft);
  text-align: center;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 34px;
}

.contact-form input,
.contact-form button {
  width: 100%;
  min-height: 56px;
  border-radius: 999px;
  border: 1px solid rgba(27,44,84,0.14);
  padding: 0 18px;
  font: inherit;
}

.contact-form button {
  border: 0;
  color: var(--white);
  font-weight: 900;
  cursor: pointer;
  background: linear-gradient(135deg, var(--uba-blue), var(--uba-cyan));
}

/* Footer */

.site-footer {
  padding: 56px 0;
  color: rgba(255,255,255,0.76);
  background: var(--uba-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
}

.site-footer img {
  width: 52px;
  margin-bottom: 16px;
}

.site-footer strong {
  display: block;
  color: var(--white);
  margin-bottom: 12px;
}

.site-footer p {
  margin: 0 0 8px;
}

.site-footer a {
  display: block;
  margin-bottom: 8px;
}

/* Responsive */

@media (max-width: 1120px) {
  .nav-links {
    gap: 16px;
    font-size: 0.88rem;
  }

  .nav-cta,
  .nav-login {
    padding: 10px 14px;
  }
}

@media (max-width: 1040px) {
  .trust-grid,
  .campus-grid {
    grid-template-columns: 1fr;
  }

  .steps-grid,
  .programs-grid,
  .differentials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-form {
    grid-template-columns: 1fr 1fr;
  }

  .campus-image img {
    height: 440px;
  }
}

@media (max-width: 820px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    inset: 82px 20px auto 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px;
    border-radius: 22px;
    background: rgba(7,20,38,0.96);
    border: 1px solid rgba(255,255,255,0.12);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: 15px;
  }

  .nav-login,
  .nav-cta {
    text-align: center;
    margin-top: 8px;
  }

  section {
    padding: 76px 0;
  }

  .trust-cards,
  .steps-grid,
  .programs-grid,
  .differentials-grid,
  .footer-grid,
  .contact-form,
  .courses-grid {
    grid-template-columns: 1fr;
  }

  .courses-actions {
    margin-top: -8px;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 260px;
  }

  .gallery-grid .large {
    grid-column: span 1;
    grid-row: span 1;
  }

  .final-cta-box {
    padding: 34px 22px;
  }
}
/* Campus virtual tipo mockup sin recorte */

.campus-grid-showcase {
  align-items: center;
}

.campus-showcase-card {
  position: relative;
  width: 100%;
  padding: 26px;
  border-radius: 34px;
  background: rgba(255,255,255,0.92);
  border: 1px solid rgba(27,44,84,0.08);
  box-shadow: 0 30px 90px rgba(7,20,38,0.13);
  overflow: visible;
}

.campus-showcase-card::before {
  content: "";
  position: absolute;
  inset: -22px;
  border-radius: 42px;
  background: radial-gradient(circle at 20% 10%, rgba(0,194,255,0.16), transparent 38%);
  z-index: -1;
}

.campus-window-bar {
  height: 12px;
  max-width: 82%;
  margin: 0 auto 18px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(27,44,84,0.08), rgba(0,194,255,0.12));
  overflow: hidden;
}

.campus-window-bar span {
  display: block;
  width: 74%;
  height: 100%;
  border-radius: inherit;
  background: rgba(255,255,255,0.82);
}

.campus-showcase-image {
  width: 100%;
  border-radius: 28px;
  overflow: hidden;
  background: #ffffff;
}

.campus-showcase-image img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 24px;
  box-shadow: none;
}

/* Anula el recorte anterior solo para esta versión */
.campus-showcase-card img {
  max-height: none;
}

/* Responsive */
@media (max-width: 1040px) {
  .campus-showcase-card {
    padding: 18px;
  }
}

@media (max-width: 820px) {
  .campus-showcase-card {
    padding: 14px;
    border-radius: 26px;
  }

  .campus-showcase-image {
    border-radius: 20px;
  }

  .campus-showcase-image img {
    border-radius: 18px;
  }
}
/* Corrección de botones en CTA final */

.final-cta .courses-actions {
  margin: 28px 0 34px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.final-cta .contact-form {
  margin-top: 0;
}

.final-cta-box p {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 820px) {
  .final-cta .courses-actions {
    margin: 24px 0 28px;
  }
}