/* ════════════════════════════════════════
   MODULES — accordion of 13 collapsible items
   Closed: number + title + plus icon
   Open: smooth GSAP slide-down with body content
════════════════════════════════════════ */

.modules {
  position: relative;
  z-index: 1;
  padding-block: clamp(2rem, 5vw, 4rem);
}

.modules__inner {
  max-width: 880px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.modules__intro {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.modules__intro-eyebrow {
  font-family: var(--f-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--silver-3);
  margin: 0;
}

.modules__intro-title {
  font-family: var(--f-display);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.012em;
  color: var(--c-text);
  margin: 0;
}

/* ── Accordion list ── */
.modules__list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid rgba(216, 216, 221, 0.1);
}

.module {
  border-bottom: 1px solid rgba(216, 216, 221, 0.1);
  transition: background 0.4s ease;
}

.module:hover { background: rgba(245, 245, 247, 0.015); }

.module.is-open {
  background: linear-gradient(180deg,
    rgba(245, 245, 247, 0.035) 0%,
    rgba(245, 245, 247, 0.005) 100%);
}

.module__header {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 1.5rem);
  padding: clamp(1.1rem, 2vw, 1.5rem) clamp(0.5rem, 1.2vw, 1rem);
  cursor: pointer;
  width: 100%;
  background: transparent;
  border: 0;
  text-align: left;
  font: inherit;
  color: inherit;
  position: relative;
}

.module__header::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) scaleY(0);
  width: 2px;
  height: 60%;
  background: linear-gradient(180deg,
    transparent 0%,
    var(--silver-1) 50%,
    transparent 100%);
  transition: transform 0.4s var(--ease-expo);
  transform-origin: center;
}

.module:hover .module__header::before,
.module.is-open .module__header::before {
  transform: translateY(-50%) scaleY(1);
}

.module__num {
  flex-shrink: 0;
  font-family: var(--f-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--silver-3);
  min-width: clamp(38px, 5vw, 56px);
  transition: color 0.3s ease;
}

.module:hover .module__num,
.module.is-open .module__num {
  color: var(--silver-1);
}

.module__title {
  flex-grow: 1;
  font-family: var(--f-display);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--c-text);
  margin: 0;
}

.module__icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  position: relative;
  transition: transform 0.45s var(--ease-expo);
}

.module__icon::before,
.module__icon::after {
  content: '';
  position: absolute;
  background: var(--silver-2);
  transition: background 0.3s ease;
}

.module__icon::before {
  top: 50%;
  left: 4px;
  right: 4px;
  height: 1.5px;
  transform: translateY(-50%);
}

.module__icon::after {
  left: 50%;
  top: 4px;
  bottom: 4px;
  width: 1.5px;
  transform: translateX(-50%);
  transition: transform 0.45s var(--ease-expo), opacity 0.45s var(--ease-expo);
}

.module.is-open .module__icon { transform: rotate(180deg); }
.module.is-open .module__icon::after { transform: translateX(-50%) scaleY(0); opacity: 0; }
.module.is-open .module__icon::before { background: var(--silver-1); }

/* ── Body (collapsible) ── */
.module__body {
  overflow: hidden;
  height: 0;
  opacity: 0;
}

.module__body-inner {
  padding: 0 clamp(0.5rem, 1.2vw, 1rem) clamp(1.1rem, 2vw, 1.5rem) clamp(3rem, 7vw, 5rem);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-family: var(--f-body);
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  line-height: 1.75;
  max-width: 700px;
}

.module__body-inner > p { margin: 0; color: var(--c-text-mid); }
.module__body-inner > p.is-strong { color: var(--c-text); font-weight: 500; }

@media (prefers-reduced-motion: reduce) {
  .module__icon, .module__header::before { transition: none; }
}