.bpm__divider {
  position: relative;
  text-align: center;
  margin: var(--space-12) 0 0;
  border-bottom: 1px solid var(--color-border);
}
.bpm__tab {
  display: inline-block;
  padding: var(--space-3) var(--space-10);
  background: var(--color-surface-sunken);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  color: var(--color-ink-tertiary);
  transform: translateY(1px);
}

.modules-text {
  font-family: var(--font-en), var(--font-tw);
  font-size: var(--scale-base);
  letter-spacing: 0.05em;
}

.bpm-module {
  display: grid;
  grid-template-columns: minmax(0, 460px) minmax(0, 460px);
  justify-content: center; /* centers the text+image pair; whitespace goes to the outer edges */
  column-gap: var(
    --space-12
  ); /* the gap between text and image — lower this to tighten them further */
  align-items: center;
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--color-border);
}

.bpm-module:last-child {
  border-bottom: none;
}

/* Alternate: even rows put the image on the left */
.bpm-module:nth-child(even) .bpm-module__media {
  order: -1;
}

/* Text column */
.bpm-module__body {
  min-width: 0; /* lets long words wrap inside the grid track */
}

.bpm-module__heading {
  font-family: var(--font-en), var(--font-tw);
  font-size: var(--scale-xl);
  font-weight: var(--weight-medium);
  color: var(--color-blue);
  margin: 0 0 var(--space-6);
}

.bpm-module__arrow {
  margin-left: var(--space-2);
}

.bpm-module__list {
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--color-ink);
}
.bpm-module__list li {
  position: relative;
  padding-left: var(--space-5);
  margin-bottom: var(--space-4);
}
.bpm-module__list li:last-child {
  margin-bottom: 0;
}
.bpm-module__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  border-radius: var(--radius-full);
  background: var(--color-ink);
}
.bpm-module__list strong {
  font-weight: var(--weight-bold);
}

/* Image column */
.bpm-module__media {
  width: 100%;
  overflow: hidden;
  /* border-radius: var(--radius-md);
  box-shadow: var(--shadow-md); */
}
.bpm-module__media img {
  width: 100%;
  height: auto;
  display: block;
}

/* Stack on small screens — text first, image below */
@media (max-width: 860px) {
  .bpm-module {
    grid-template-columns: 1fr;
    justify-content: stretch;
    gap: var(--space-8);
    padding: var(--space-10) 0;
  }
  .bpm-module:nth-child(even) .bpm-module__media {
    order: 0;
  }
  .bpm-module__media {
    max-width: 460px;
    margin: 0 auto;
  }
}

/* ===========================
   TECHNIQUES — video block + zigzag accordion groups
=========================== */
.techniques {
  /* background: var(--color-surface-raised); */
  overflow-x: clip;
}

.techniques__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

/* Full-width video block */
.techniques__video {
  width: 100%;
  max-width: 960px;
  margin: 0 auto var(--space-20);
  border-radius: var(--radius-xl);
  overflow: hidden;
  gap: var(--space-4);
}

.techniques__video-media {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
}

/* Feature groups stack vertically */
.techniques__groups {
  display: flex;
  flex-direction: column;
}

.tech-group {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--color-border);
}
.tech-group:last-child {
  border-bottom: none;
}

.tech-group__heading {
  font-family: var(--font-en), var(--font-tw);
  font-size: var(--scale-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
  margin: 0 0 var(--space-8);
}

.tech-group__frame {
  display: grid;
  grid-template-columns: minmax(0, 460px) minmax(0, 460px);
  justify-content: center;
  column-gap: var(--space-12);
  align-items: start;
}

/* media comes first in markup by default (left); reverse variant flips it */
.tech-group--reverse .tech-group__accordion {
  order: -1;
}

.tech-group__media {
  width: 100%;
  border-radius: var(--radius-md);
}

.tech-group__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  /* transition: opacity var(--transition-base); */
}
.tech-group__image.is-fading {
  opacity: 0;
}

.tech-group__accordion {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Accordion item — plain left border, no background */
.tech-item {
  border-left: 3px solid var(--color-ink);
  padding-left: var(--space-4);
  transition: border-color var(--transition-base);
}
.tech-item + .tech-item {
  margin-top: var(--space-3);
}
.tech-item.is-open {
  border-left-color: var(--color-blue);
}

.tech-item__tab {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: none;
  border: none;
  padding: var(--space-3) 0;
  cursor: pointer;
  text-align: left;
  color: var(--color-ink);
  transition: color var(--transition-base);
}
.tech-item.is-open .tech-item__tab {
  color: var(--color-blue);
}

.tech-item__label {
  font-family: var(--font-en), var(--font-tw);
  font-size: var(--scale-base);
  font-weight: var(--weight-medium);
}

.tech-item__arrow {
  display: flex;
  flex-shrink: 0;
}
.tech-item__arrow svg {
  transition: transform var(--transition-base);
}
.tech-item.is-open .tech-item__arrow svg {
  transform: rotate(180deg);
}

.tech-item__detail {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition:
    max-height var(--transition-slow),
    opacity var(--transition-base),
    margin var(--transition-slow);
}
.tech-item.is-open .tech-item__detail {
  max-height: 240px;
  opacity: 1;
  margin-bottom: var(--space-2);
}

.tech-item__detail p {
  margin: 0;
  color: var(--color-ink);
}

/* Responsive */
@media (max-width: 860px) {
  .tech-group__frame {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .tech-group--reverse .tech-group__accordion {
    order: 0;
  }
  .tech-group__media {
    max-width: 460px;
    margin: 0 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tech-item__detail,
  .tech-item__arrow svg,
  .tech-group__image {
    transition: none;
  }
}

/* ===========================
   MODULES divider tab
=========================== */
.bpm__divider {
  position: relative;
  text-align: center;
  margin: var(--space-12) 0 0;
  border-bottom: 1px solid var(--color-border);
}

.bpm__tab {
  display: inline-block;
  padding: var(--space-3) var(--space-10);
  background: var(--color-surface-sunken);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  color: var(--color-ink-tertiary);
  transform: translateY(1px);
}

.modules-text {
  font-family: var(--font-en), var(--font-tw);
  font-size: var(--scale-lg);
  letter-spacing: 0.05em;
}

/* === Scroll reveal: slide-in (Kolr-style) === */