/* Arkum Labs — Layout (FeatureBlock, Accordion) */

/* ============================== FEATURE BLOCK ============================== */
.ark-feature {
  position: relative;
  display: flex; flex-direction: column; gap: var(--space-4);
  padding: var(--pad-panel);
  background: var(--surface-panel);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-panel);
  box-shadow: var(--edge-top);
  transition: var(--t-control);
}
.ark-feature--interactive { cursor: pointer; }
.ark-feature--interactive:hover { border-color: var(--border-strong); background: var(--surface-card); }
.ark-feature--bare { background: transparent; border: none; box-shadow: none; padding: 0; }
.ark-feature__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; flex: none;
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  background: var(--surface-card); color: var(--accent);
}
.ark-feature__icon svg { width: 20px; height: 20px; }
.ark-feature__index {
  font-family: var(--font-mono); font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wider); color: var(--text-faint);
}
.ark-feature__title {
  font-family: var(--font-display); font-weight: var(--fw-medium);
  font-size: var(--text-xl); letter-spacing: var(--tracking-tight);
  line-height: var(--leading-snug); color: var(--text-strong); margin: 0;
}
.ark-feature__desc { font-size: var(--text-sm); line-height: var(--leading-normal); color: var(--text-muted); margin: 0; }
.ark-feature__link {
  margin-top: auto; display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: var(--fw-medium); color: var(--text-strong);
  text-decoration: none; width: fit-content;
}
.ark-feature__link svg { width: 14px; height: 14px; transition: var(--t-transform); }
.ark-feature__link:hover { color: var(--accent); }
.ark-feature__link:hover svg { transform: translateX(3px); }
/* portal seam top accent for the lead feature */
.ark-feature--seam::before {
  content: ""; position: absolute; top: 0; left: var(--pad-panel); width: 28px; height: 2px;
  background: var(--accent); box-shadow: var(--glow-cyan-sm);
}

/* ============================== ACCORDION ============================== */
.ark-accordion { border: 1px solid var(--border-default); border-radius: var(--radius-panel); overflow: hidden; background: var(--surface-card); }
.ark-accordion__item { border-bottom: 1px solid var(--border-subtle); }
.ark-accordion__item:last-child { border-bottom: none; }
.ark-accordion__trigger {
  width: 100%; display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: transparent; border: none; cursor: pointer; text-align: left;
  font-family: var(--font-sans); font-size: var(--text-base); font-weight: var(--fw-medium);
  color: var(--text-default); transition: var(--t-control);
}
.ark-accordion__trigger:hover { background: var(--surface-hover); color: var(--text-strong); }
.ark-accordion__trigger:focus-visible { outline: none; box-shadow: var(--glow-focus); }
.ark-accordion__trigger[aria-expanded="true"] { color: var(--text-strong); }
.ark-accordion__num { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-faint); flex: none; width: 2.5ch; }
.ark-accordion__label { flex: 1; }
.ark-accordion__chev {
  flex: none; width: 16px; height: 16px; color: var(--text-muted);
  transition: transform var(--dur-base) var(--ease-standard);
}
.ark-accordion__trigger[aria-expanded="true"] .ark-accordion__chev { transform: rotate(180deg); color: var(--accent); }
.ark-accordion__panel {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-slow) var(--ease-out);
}
.ark-accordion__panel--open { grid-template-rows: 1fr; }
.ark-accordion__panel > div { overflow: hidden; }
.ark-accordion__content {
  padding: 0 var(--space-5) var(--space-5) calc(var(--space-5) + 2.5ch + var(--space-4));
  font-size: var(--text-sm); line-height: var(--leading-normal); color: var(--text-muted);
}