/* Stepper (UnbundleFlowRedesign "Stepper shown on every session page"). Tokens only.
   Every state is icon + text: done (check, link), current (dot), ready (ring: Approve unlocked), locked (lock).
   Steps behind are links; steps ahead stay locked until the session status allows them. */
.stepper { min-width: 0; }
.stepper__list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.375rem; }
.stepper__step { min-width: 0; }
.stepper__link { display: flex; align-items: center; gap: var(--space-2); min-height: var(--target-min); padding: 0 0.625rem; border-radius: var(--radius-md); background: var(--color-surface-muted); color: var(--color-text-secondary); font-size: var(--text-sm); font-weight: 600; text-decoration: none; }
a.stepper__link:hover { text-decoration: underline; }
.stepper__icon { flex: none; display: inline-grid; place-items: center; width: 0.875rem; font-size: 0.75rem; line-height: 1; }
.stepper__label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stepper__step--done .stepper__link { background: var(--color-success-bg); color: var(--color-success-text); }
.stepper__step--current .stepper__link { background: var(--color-primary); color: var(--color-primary-text); }
.stepper__step--ready .stepper__link { background: var(--color-primary-subtle); color: var(--color-primary); }
.stepper__step.is-here:not(.stepper__step--current) .stepper__link { box-shadow: inset 0 0 0 2px var(--color-primary); }
@media (max-width: 767px) {
  .stepper__step:not(.is-here) .stepper__label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .stepper__step:not(.is-here) .stepper__link { justify-content: center; }
  .stepper__list { grid-template-columns: repeat(4, auto); justify-content: start; }
}

/* StageRail: vertical connected steps with text status. */
.stage-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.stage { position: relative; display: grid; grid-template-columns: 1.5rem minmax(0, 1fr) auto; gap: var(--space-3); align-items: center; min-height: 2.75rem; }
.stage:not(:last-child)::before { content: ''; position: absolute; left: calc(0.75rem - 1px); top: calc(50% + 0.75rem); height: calc(100% - 1.5rem); width: 2px; background: var(--color-border); }
.stage--done:not(:last-child)::before { background: var(--color-success-border); }
.stage__icon { position: relative; display: grid; place-items: center; width: 1.5rem; height: 1.5rem; border-radius: var(--radius-pill); border: 2px dashed var(--color-border-strong); background: var(--color-surface); }
.stage__label { font-size: var(--text-sm); color: var(--color-text-secondary); overflow-wrap: anywhere; }
.stage__status { font-size: var(--text-xs); font-weight: 600; color: var(--color-text-muted); text-transform: capitalize; }
.stage--done .stage__icon { border: 0; background: var(--color-success-border); }
.stage--done .stage__icon::after { content: ''; width: 35%; height: 60%; margin-top: -2px; border: solid var(--color-surface); border-width: 0 2px 2px 0; transform: rotate(45deg); animation: tick-in var(--duration-fast) var(--ease-out) both; }
.stage--done .stage__status { color: var(--color-success-text); }
.stage--running .stage__icon { border: 2px solid var(--color-info-border); border-top-color: transparent; animation: spin 900ms linear infinite; }
.stage--running .stage__label { font-weight: 700; color: var(--color-text); }
.stage--running .stage__status { color: var(--color-info-text); }
.stage--failed .stage__icon { border: 0; background: var(--color-danger-border); }
.stage--failed .stage__icon::after { content: '✕'; color: var(--color-primary-text); font-size: var(--text-xs); font-weight: 700; }
.stage--failed .stage__status { color: var(--color-danger-text); }
.stage--skipped .stage__label { text-decoration: line-through; text-decoration-color: var(--color-border-strong); }

@keyframes tick-in { from { opacity: 0; transform: rotate(45deg) scale(0.6); } to { opacity: 1; transform: rotate(45deg) scale(1); } }
@media (prefers-reduced-motion: reduce) {
  .stage--running .stage__icon { animation: none; border-top-color: var(--color-info-border); }
  .stage--done .stage__icon::after { animation: none; }
}