.timeline,
.services,
.testimonials {
  padding: 4rem 2rem 6rem;
}

.timeline-grid,
.services-grid,
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.timeline-card,
.service-card,
.testimonial-card,
.stack-card {
  position: relative;
  border: 0.2rem solid var(--accent-gold);
  border-radius: 50px;
  padding: 1.8rem 2rem;
  background: var(--surface-card);
  color: var(--blanco);
  text-align: center;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    outline-color 0.25s ease;
}

body.cambiocolor .timeline-card,
body.cambiocolor .service-card,
body.cambiocolor .testimonial-card,
body.cambiocolor .stack-card {
  color: var(--blanco);
}

.timeline-card,
.service-card,
.testimonial-card {
  display: flex;
  flex-direction: column;
}

.timeline-card:hover,
.service-card:hover,
.testimonial-card:hover,
.stack-card:hover {
  outline: 2px solid var(--accent-gold);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.18), 0 0 20px var(--accent-glow);
  transform: translateY(-4px);
}

@media (prefers-reduced-motion: reduce) {
  .timeline-card,
  .service-card,
  .testimonial-card,
  .stack-card {
    transition: none;
  }
}

.timeline-year {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.2rem 0.9rem;
  border-radius: 999px;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin: 0 auto 1.2rem;
  border: 1px solid rgba(212, 166, 58, 0.5);
  background: rgba(212, 166, 58, 0.12);
}

.timeline-card h3,
.service-card h3,
.testimonial-card h3,
.stack-card-title {
  margin: 0 0 0.8rem;
  font-size: 2.1rem;
  text-wrap: balance;
}

.timeline-card p,
.service-card p,
.testimonial-card p {
  margin: 0 auto;
  max-width: 80%;
  font-size: 1.7rem;
  line-height: 1.5;
}

.stack-section {
  padding: 4rem 2rem;
}

/* Skeleton Loader for PDF Certificate */
.pdf-skeleton {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--surface-card) 25%, var(--surface-card-strong) 50%, var(--surface-card) 75%);
  background-size: 200% 100%;
  animation: bg-skeleton 1.5s infinite;
  border-radius: 12px;
  display: flex !important;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.pdf-skeleton::after {
  content: '\bx-loader-alt';
  font-family: 'boxicons';
  font-size: 3rem;
  color: var(--accent-gold);
  animation: spin 1s linear infinite;
}

@keyframes bg-skeleton {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.stack-section {
  margin-top: 4rem;
  text-align: center;
}

.stack-section h3 {
  margin: 0 0 0.6rem;
  font-size: 2.6rem;
}

.stack-section p {
  margin: 0 auto 1.6rem;
  max-width: 720px;
  font-size: 1.7rem;
}

.stack-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.stack-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 14rem;
  cursor: pointer;
  font: inherit;
}

.stack-card-meta,
.service-card-kicker,
.testimonial-card-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.2rem 0.9rem;
  border-radius: 999px;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 auto 1rem;
  background: var(--button-bg);
  color: var(--button-text);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.14);
}

.stack-card-meta {
  margin-top: 0.2rem;
  margin-bottom: 0;
}

.timeline-card {
  justify-content: center;
  min-height: 22rem;
}

.service-card {
  justify-content: center;
  min-height: 22rem;
}

.service-card p {
  max-width: 80%;
}

.testimonial-card {
  justify-content: space-between;
  min-height: 24rem;
  gap: 1.2rem;
}

.testimonial-card p {
  max-width: 88%;
  font-size: 1.85rem;
}

.testimonial-card h3 {
  margin-top: auto;
  margin-bottom: 0;
  font-size: 1.55rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-gold);
}