/* ============================================================
   SmartStack — problem.css
   Section "La problématique" — fond navy, cartes pain points
   ============================================================ */

.problem {
  background-color: var(--color-navy);
  padding: var(--space-4xl) 0;
  position: relative;
  overflow: hidden;
}

/* Halo décoratif en arrière-plan */
.problem::before {
  content: '';
  position: absolute;
  top: -240px;
  right: -180px;
  width: 640px;
  height: 640px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 65%);
  pointer-events: none;
}
.problem::after {
  content: '';
  position: absolute;
  bottom: -160px;
  left: -120px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(239, 68, 68, 0.07) 0%, transparent 65%);
  pointer-events: none;
}

.problem__container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  position: relative;
  z-index: 1;
}

/* ─── Intro ─────────────────────────────────────────────────── */
.problem__intro {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-3xl);
}

.problem__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.35rem 1rem;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.28);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: #fca5a5;
  margin-bottom: var(--space-xl);
}

.problem__badge svg {
  width: 13px;
  height: 13px;
}

.problem__title {
  font-family: var(--font-serif);
  font-size: clamp(1.875rem, 3.5vw, 2.75rem);
  font-weight: 400;
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.01em;
}

.problem__lead {
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.75;
}

/* ─── Cards ─────────────────────────────────────────────────── */
.problem__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.problem__card {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition:
    border-color var(--transition-base),
    background-color var(--transition-base),
    transform var(--transition-base);
}

.problem__card:hover {
  background: rgba(255, 255, 255, 0.055);
  border-color: rgba(239, 68, 68, 0.28);
  transform: translateY(-3px);
}

.problem__card-icon {
  width: 46px;
  height: 46px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.22);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: #fca5a5;
}

.problem__card-icon svg {
  width: 20px;
  height: 20px;
}

.problem__card-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.problem__card-text {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 860px) {
  .problem__cards {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
}

@media (min-width: 860px) and (max-width: 1060px) {
  .problem__cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ─── Comparison (Sans / Avec) ────────────────────────────────── */
.problem__comparison {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .problem__comparison {
    grid-template-columns: 1fr 1fr;
  }
}

.problem__col {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.problem__col:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.problem__col--sans {
  border-color: rgba(239, 68, 68, 0.15);
}
.problem__col--sans:hover {
  border-color: rgba(239, 68, 68, 0.35);
}

.problem__col--avec {
  border-color: rgba(37, 99, 235, 0.25);
  background: rgba(37, 99, 235, 0.05);
}
.problem__col--avec:hover {
  border-color: rgba(37, 99, 235, 0.45);
}

.problem__col-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-white);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.problem__col--sans .problem__col-title { color: #fca5a5; }
.problem__col--avec .problem__col-title { color: #93c5fd; }
.problem__col-title svg {
  width: 24px;
  height: 24px;
}

.problem__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.problem__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.5;
}

.problem__col--sans .problem__list li svg {
  color: rgba(239, 68, 68, 0.8);
  flex-shrink: 0;
  margin-top: 3px;
  width: 20px;
  height: 20px;
}
.problem__col--avec .problem__list li svg {
  color: rgba(37, 99, 235, 0.8);
  flex-shrink: 0;
  margin-top: 3px;
  width: 20px;
  height: 20px;
}