/* ============================================
   MELI UX Challenge — Section-Specific Styles
   Hero and section layout overrides
   ============================================ */

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--surface-background) 0%, var(--surface-card) 60%, var(--surface-background-alt) 100%);
  position: relative;
  overflow: hidden;
  padding: var(--space-4xl) 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--brand-primary-soft) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--brand-secondary-soft) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-2xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__content {
  display: flex;
  flex-direction: column;
}

.hero__back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  align-self: flex-start;
  margin-bottom: var(--space-md);
  padding: 10px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-medium);
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-primary);
  font-size: var(--font-body-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}

.hero__back-link:hover {
  transform: translateY(-1px);
  border-color: var(--interactive-action);
  background: var(--surface-card);
  box-shadow: var(--shadow-md);
}

.hero__back-link:focus-visible {
  outline: 2px solid var(--interactive-action);
  outline-offset: 2px;
}

.hero__back-link-icon {
  font-size: 14px;
}

.hero__badge {
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.05;
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}

.hero__title span {
  display: block;
}

.hero__title .hero__title-accent {
  color: var(--brand-secondary);
}

.hero__subtitle {
  font-size: var(--font-heading-lg);
  line-height: var(--lh-heading-lg);
  font-weight: var(--weight-regular);
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: var(--space-xl);
}

.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero__visual img {
  max-width: 420px;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.08));
}

/* ── Section Backgrounds ── */
#brief {
  background: var(--surface-card);
}

#problema {
  background: var(--surface-background);
}

#investigar {
  background: var(--surface-card);
  padding-bottom: var(--space-xl);
}

/* ── Section spacing refinement ── */
.section:first-of-type {
  padding-top: calc(var(--space-4xl) + var(--nav-height));
}