/* ---------------------------------------------------------------
   Explore — capability atlas (bonus frame, in-frame tab switching)
--------------------------------------------------------------- */

.frame--explore .frame__header { margin-bottom: var(--space-md); }
.atlas { display: flex; gap: var(--space-xl); align-items: flex-start; }
.atlas__tabs { display: flex; flex-direction: column; gap: 4px; flex-shrink: 0; width: 190px; }
.atlas__tab {
  text-align: left; padding: 10px 14px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; color: var(--text-faint);
  border-left: 2px solid transparent;
  transition: color var(--dur-fast), background var(--dur-fast), border-color var(--dur-fast);
}
.atlas__tab:hover { color: var(--text); background: var(--surface); }
.atlas__tab.is-active { color: var(--blue); border-left-color: var(--blue); background: var(--surface); }

.atlas__panels { flex: 1; min-width: 0; position: relative; min-height: 420px; }
.atlas__panel { position: absolute; inset: 0; opacity: 0; visibility: hidden; }
.atlas__panel.is-active { opacity: 1; visibility: visible; position: relative; }
.atlas__panel h3 { font-size: var(--fs-h3); margin-bottom: var(--space-md); }

.atlas__spectrum { display: flex; justify-content: space-between; position: relative; padding-top: var(--space-md); margin-top: var(--space-lg); }
.atlas__spectrum::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--blue), var(--amber)); }
.atlas__spectrum span { position: relative; font-size: 14px; font-weight: 600; color: var(--text-dim); }
.atlas__spectrum span::before { content: ''; position: absolute; top: -25px; left: 50%; transform: translateX(-50%); width: 9px; height: 9px; border-radius: 50%; background: var(--blue); }

.atlas__steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }
.atlas__steps > div { padding: var(--space-md); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.atlas__stepnum { font-family: var(--font-display); color: var(--blue); font-weight: 600; font-size: 18px; }
.atlas__steps h4 { font-size: 16px; margin: 6px 0 0; }
.atlas__closing { margin-top: var(--space-lg); font-style: italic; font-size: 17px; color: var(--text-dim); }

.atlas__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.atlas__grid > div { padding: var(--space-md); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.atlas__grid h4 { font-size: 16px; }

.atlas__index { columns: 2; gap: var(--space-lg); }
.atlas__index li {
  position: relative; padding: 6px 0 6px 20px; font-size: 16px; color: var(--text-dim);
  break-inside: avoid; border-bottom: 1px solid var(--border);
}
.atlas__index li::before { content: '›'; position: absolute; left: 0; color: var(--blue); font-weight: 700; }