/* ========================================
   Events
======================================== */

.sts2-grid-events {
  grid-template-columns: repeat(auto-fill, minmax(13em, 1fr));
}

.event-card {
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--sts2-gradient-dark);
  border: var(--sts2-border-thin) solid var(--sts2-border);
  border-radius: var(--sts2-radius-xs);
}

/* ========================================
   フリップ構造
   ======================================== */

.event-card-body {
  position: relative;
  overflow: hidden;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.event-icon {
  width: 100%;
  aspect-ratio: 16/9;
  border: var(--sts2-border-base) solid var(--sts2-border);
}

.event-content {
  display: flex;
  flex-direction: column;
  gap: var(--sts2-gap-md);
  min-height: 16em;
  flex-grow: 1;
  padding: 1em 1em 3.2em 1em;
  position: relative;
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
}

.event-card.choices-open .event-content {
  pointer-events: none;
}

.event-inline-choices {
  position: absolute;
  top: 25%;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(calc(100% + 1px));
  transition:
    opacity 0.3s ease,
    transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  background: rgba(10, 15, 25, 0.82);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-top: var(--sts2-border-thin) solid var(--sts2-border-hover);
  border-radius: 0 0 var(--sts2-radius-xs) var(--sts2-radius-xs);
}

.event-inline-choices::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2.5em;
  background: linear-gradient(transparent, rgba(10, 15, 25, 0.9));
  pointer-events: none;
  border-radius: 0 0 var(--sts2-radius-xs) var(--sts2-radius-xs);
  z-index: 1;
}

.event-card.choices-open .event-inline-choices {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.event-choices-back {
  padding: 0.75em 1em;
  background: rgba(80, 100, 140, 0.4);
  border: none;
  border-bottom: var(--sts2-border-thin) solid var(--sts2-border-hover);
  color: var(--sts2-text-secondary);
  font-size: var(--sts2-font-sm);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sts2-gap-md);
  transition: var(--sts2-transition);
  flex-shrink: 0;
  width: 100%;
  letter-spacing: 0.03em;
  border-radius: var(--sts2-radius-xs) var(--sts2-radius-xs) 0 0;
}

.event-choices-back:hover {
  color: var(--sts2-text-primary);
  background: rgba(80, 100, 140, 0.6);
}

.event-choices-back svg {
  width: 1.2em;
  height: 1.2em;
  fill: currentColor;
  flex-shrink: 0;
}

.event-choices-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--sts2-padding-lg);
  display: flex;
  flex-direction: column;
  gap: 0.85em;
}

.event-choices-scroll::-webkit-scrollbar {
  width: 0.4em;
}
.event-choices-scroll::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--sts2-radius-xs);
}
.event-choices-scroll::-webkit-scrollbar-thumb {
  background: var(--sts2-border-hover);
  border-radius: var(--sts2-radius-xs);
}

.event-choices-button {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.75em var(--sts2-padding-lg);
  background: linear-gradient(
    135deg,
    rgba(40, 50, 70, 0.95),
    rgba(30, 40, 60, 0.95)
  );
  border: var(--sts2-border-thin) solid rgba(100, 150, 200, 0.3);
  border-radius: 0 0 var(--sts2-radius-xs) var(--sts2-radius-xs);
  color: var(--sts2-text-primary);
  font-weight: 600;
  font-size: var(--sts2-font-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: var(--sts2-transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
}

.event-choices-button svg {
  width: 1.2em;
  height: 1.2em;
  fill: currentColor;
  flex-shrink: 0;
}

.event-choices-button:hover {
  background: linear-gradient(
    135deg,
    rgba(60, 80, 120, 0.98),
    rgba(50, 70, 110, 0.98)
  );
  border-color: rgba(120, 170, 220, 0.5);
}

/* ========================================
   選択肢アイテム
   ======================================== */

.choice-desc {
  padding: 0.85em 1em;
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--sts2-font-sm);
  line-height: 1.75;
  background: rgba(0, 0, 0, 0.15);
}

.event-header h2 {
  font-size: 1.05em;
}

.event-dev-id {
  font-size: 0.65em;
  color: rgba(255, 255, 255, 0.35);
  font-family: monospace;
  font-weight: normal;
  letter-spacing: 0;
}

.event-body {
  font-size: var(--sts2-font-md);
}

.no-events {
  text-align: center;
  padding: 4em 2em;
  color: var(--sts2-text-muted);
  grid-column: 1 / -1;
}

.no-events-icon {
  font-size: 4em;
  margin-bottom: 0.5em;
  opacity: 0.5;
}

.no-events-text {
  font-size: 1.1em;
  line-height: 1.6;
}

@media (max-width: 48em) {
  .sts2-grid-events {
    grid-template-columns: repeat(2, 1fr);
  }
}