/* Tokens */
.firefly-howto {
  --c-text-primary: var(--color-black);
  --c-text-tertiary: var(--color-black);
  --c-bg-default: var(--color-white);
  --c-bg-active: #ece4f3;
  --c-focus: #0054bb;
  --s-spacing-md: 1.5rem;
  --s-spacing-xl: 40px;
  --acc-item-radius: 8px;
  --acc-item-shadow: 0 2px 8px rgb(0 0 0 / 5%);
  --anim-speed: 0.4s;
  --anim-easing: cubic-bezier(0.4, 0, 0.2, 1);
  --foreground-gap: 1.25rem;
  --icon-size: 16px;
  --icon-offset: 40px;
  --trigger-padding-inline: var(--s-spacing-md);
  --trigger-gap: 16px;
  --trigger-row-gap: 4px;
  --step-column-width: 0;
  --step-font-size: 0.75rem;
  --title-font-size: 1.25rem;
  --content-font-size: 1rem;
  --content-bottom-padding: 8px;
  --panel-top-offset: -16px;
  --content-right-padding: calc(var(--trigger-padding-inline) + var(--icon-offset));
  --content-left-padding: var(--trigger-padding-inline);

  font-family: var(--body-font-family);
}

/* Layout */
.firefly-howto .foreground {
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--foreground-gap);
}

/* Accordion Item */
.firefly-howto .firefly-howto-item {
  background: var(--c-bg-default);
  border-radius: var(--acc-item-radius);
  box-shadow: var(--acc-item-shadow);
  transition: background-color var(--anim-speed) ease;
  overflow: hidden;
  border: 1px solid transparent;
  position: relative;
  cursor: pointer;
}

.firefly-howto .firefly-howto-item.is-open {
  background-color: var(--c-bg-active);
}

/* Trigger/Header */
.firefly-howto .firefly-howto-header {
  margin: 0;
}

.firefly-howto .firefly-howto-trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr var(--icon-size);
  grid-template-areas:
    "step step"
    "title icon";
  row-gap: var(--trigger-row-gap);
  column-gap: var(--trigger-gap);
  align-items: start;
  padding: var(--trigger-padding-inline);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  color: var(--c-text-primary);
  font-family: var(--body-font-family);
  position: relative;
  z-index: 1;
  outline: none;
}

.firefly-howto .firefly-howto-item:has(.firefly-howto-trigger:focus-visible) {
  outline: 2px solid var(--c-focus);
  outline-offset: -2px;
}

.firefly-howto .step-indicator {
  grid-area: step;
  font-size: var(--step-font-size);
  font-weight: 500;
  color: var(--c-text-tertiary);
  text-transform: uppercase;
  line-height: 1.25;
  overflow-wrap: break-word;
}

.firefly-howto .firefly-howto-item.is-open .step-indicator {
  color: var(--c-text-primary);
}

.firefly-howto .firefly-howto-title {
  grid-area: title;
  font-size: var(--title-font-size);
  font-weight: 800;
  line-height: 1.5;
}

/* Icon */
.firefly-howto .firefly-howto-icon {
  grid-area: icon;
  align-self: center;
  display: flex;
  width: var(--icon-size);
  height: var(--icon-size);
  align-items: center;
  justify-content: center;
  color: var(--c-text-primary);
  z-index: 3;
}

.firefly-howto .firefly-howto-icon svg {
  width: 100%;
  height: 100%;
}

.firefly-howto .firefly-howto-icon .vert-line {
  transform-origin: 50% 50%;
  transition: transform var(--anim-speed) var(--anim-easing), opacity var(--anim-speed) var(--anim-easing);
}

.firefly-howto .firefly-howto-trigger[aria-expanded='true'] .firefly-howto-icon .vert-line {
  transform: rotate(90deg);
  opacity: 0;
}

/* Panel + Content */
.firefly-howto .firefly-howto-panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows var(--anim-speed) var(--anim-easing), visibility 0s linear var(--anim-speed);
  position: relative;
  top: var(--panel-top-offset);
  z-index: 2;
}

.firefly-howto .firefly-howto-panel-inner {
  overflow: hidden;
}

.firefly-howto .firefly-howto-content {
  padding: 0 var(--content-right-padding) var(--content-bottom-padding) var(--content-left-padding);
  opacity: 0;
  transition: opacity 0.2s ease;
  font-weight: 400;
  font-size: var(--content-font-size);
  letter-spacing: normal;
  line-height: 1.5;
}

.firefly-howto .firefly-howto-content > *:first-child {
  margin-top: 0;
}

.firefly-howto .firefly-howto-content > *:last-child {
  margin-bottom: 0;
}

.firefly-howto .foreground .firefly-howto-panel .firefly-howto-content p {
  line-height: 1.6;
  color: var(--c-text-primary);
  margin: 0;
}

/* State Variants */
.firefly-howto .firefly-howto-item.is-open .firefly-howto-panel {
  grid-template-rows: 1fr;
  visibility: visible;
  transition: grid-template-rows var(--anim-speed) var(--anim-easing), visibility 0s linear 0s;
}

.firefly-howto .firefly-howto-item.is-open .firefly-howto-content {
  opacity: 1;
  transition: opacity var(--anim-speed) ease 0.1s;
}

/* Responsive Overrides */
@media (min-width: 600px) {
  .firefly-howto {
    --step-column-width: 55px;
    --step-font-size: 1rem;
    --trigger-padding-inline: var(--s-spacing-xl);
    --trigger-row-gap: 0;
    --content-bottom-padding: 16px;
    --panel-top-offset: -24px;
    --content-left-padding: calc(var(--trigger-padding-inline) + var(--step-column-width) + var(--trigger-gap));
  }

  .firefly-howto .firefly-howto-trigger {
    grid-template-columns: var(--step-column-width) 1fr var(--icon-size);
    grid-template-areas: "step title icon";
    align-items: baseline;
  }
}

@media (min-width: 1200px) {
  .firefly-howto {
    --step-column-width: 65px;
    --trigger-gap: var(--s-spacing-md);
    --title-font-size: 1.5rem;
    --content-font-size: 1.25rem;
    --content-left-padding: calc(var(--trigger-padding-inline) + var(--step-column-width) + var(--trigger-gap));
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .firefly-howto .firefly-howto-icon .vert-line,
  .firefly-howto .firefly-howto-panel,
  .firefly-howto .firefly-howto-content {
    transition: none !important;
  }
}