/* usecase.css - "こんな業務にAIが使えます" */

.usecase {
  position: relative;
  padding: var(--sp-9) 0;
  background: var(--cal-bg);
  overflow: hidden;
}

.usecase__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.usecase__bg-circle {
  position: absolute;
  border-radius: 50%;
  background: var(--cal-teal-tint);
}
.usecase__bg-circle--a { width: 300px; height: 300px; top: 10%;   right: -150px; opacity: 0.4; }
.usecase__bg-circle--b { width: 220px; height: 220px; bottom: 8%; left:  -100px; opacity: 0.45; }

.usecase__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

.usecase__header {
  text-align: center;
  margin-bottom: var(--sp-8);
}
.usecase__label { display: inline-block; margin-bottom: var(--sp-3); }
.usecase__heading { margin-bottom: var(--sp-4); }
.usecase__lead {
  color: var(--fg-2);
  max-width: 40em;
  margin: 0 auto;
}

.usecase__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-4);
  max-width: 1080px;
  margin: 0 auto;
  list-style: none;
  padding: 0;
}

.usecase__card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: var(--sp-4);
  align-items: center;
  padding: var(--sp-5);
}

/* Local override: UseCase uses 64px filled icon (between md and lg) */
.usecase__card .card__icon {
  width: 64px;
  height: 64px;
}
.usecase__card .card__icon i,
.usecase__card .card__icon svg {
  width: 28px;
  height: 28px;
}

.usecase__card-text {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  min-width: 0;
}
.usecase__card-title {
  margin: 0;
}
.usecase__card-examples {
  margin: 0;
  color: var(--fg-2);
}

.usecase__cta {
  text-align: center;
  margin: var(--sp-7) auto 0;
  font-size: var(--fs-body);
  color: var(--fg-2);
  max-width: 40em;
}

/* --- Tablet (≤1024px) --- 2 cols ------------------------------- */
@media (max-width: 1024px) {
  .usecase__cards {
    grid-template-columns: repeat(2, 1fr);
    max-width: 720px;
  }
}

/* --- Mobile (≤768px) ---- 1 col -------------------------------- */
@media (max-width: 768px) {
  .usecase { padding: var(--sp-7) 0; }
  .usecase__cards {
    grid-template-columns: 1fr;
    gap: var(--sp-3);
    max-width: 480px;
  }
}