/* ============================================================================
   METANOIA · HOW IT WORKS — V3
   A guided "Loop" stepper: slim 7-marker track + one large step stage.
   Prev/Next + clickable markers + keyboard. Step 7 loops to step 1.
   ============================================================================ */

.how-v3 {
  padding: 140px 0;
}
.how-v3 .wrap-narrow {
  width: min(1000px, 100%);
  margin: 0 auto;
  padding: 0 48px;
  position: relative;
}

/* ---------- head ---------- */
.how-v3 .s-head {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 20px;
}
.how-v3 .s-head .eyebrow { justify-content: center; }
.how-v3 .s-head .h2 { margin: 0; text-wrap: balance; }
.how-v3 .s-head .lede { margin: 20px auto 0; max-width: 600px; text-align: center; }

/* ---------- marker track ---------- */
.loop {
  max-width: 900px;
  margin: 56px auto 0;
}
.loop-track {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  margin-bottom: 44px;
  padding: 0 6px;
}
.loop-track::before {
  content: '';
  position: absolute;
  left: 18px; right: 18px; top: 50%;
  height: 1px;
  background: linear-gradient(90deg,
    var(--act-1), var(--act-2), var(--act-3), var(--act-4),
    var(--act-5), var(--act-6), var(--act-7));
  opacity: 0.28;
  transform: translateY(-0.5px);
}
/* progress fill — width set inline by JS via --progress */
.loop-track::after {
  content: '';
  position: absolute;
  left: 18px; top: 50%;
  height: 1px;
  width: calc((100% - 36px) * var(--progress, 0));
  background: var(--c, var(--act-1));
  box-shadow: 0 0 8px var(--c, var(--act-1));
  transform: translateY(-0.5px);
  transition: width 460ms var(--ease-out-soft), background 460ms var(--ease-out-soft);
}

.loop-marker {
  position: relative; z-index: 1;
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--canvas-black);
  border: 1.5px solid color-mix(in srgb, var(--c) 55%, rgba(255,255,255,0.12));
  box-shadow: 0 0 0 4px var(--canvas-black);
  cursor: pointer;
  font-family: var(--font-display); font-weight: 600;
  font-size: 11px; color: var(--fg3);
  font-variant-numeric: tabular-nums;
  transition: transform 280ms var(--ease-spring), border-color 280ms var(--ease-out-soft), color 280ms var(--ease-out-soft), background 280ms var(--ease-out-soft);
}
.loop-marker:hover { color: var(--fg1); border-color: var(--c); }
.loop-marker:focus-visible { outline: 2px solid color-mix(in srgb, var(--c) 60%, transparent); outline-offset: 3px; }
.loop-marker[data-done] {
  color: var(--fg2);
  border-color: color-mix(in srgb, var(--c) 70%, transparent);
}
.loop-marker[data-active] {
  background: var(--c);
  border-color: var(--c);
  color: var(--canvas-black);
  transform: scale(1.18);
  box-shadow: 0 0 0 4px var(--canvas-black), 0 0 18px var(--c);
}

/* ---------- step stage ---------- */
.loop-stage {
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0));
  padding: 0;
  overflow: hidden;
  min-height: 232px;
}
.loop-stage::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--c, var(--act-1));
  box-shadow: 0 0 16px var(--c, var(--act-1));
  transition: background 460ms var(--ease-out-soft), box-shadow 460ms var(--ease-out-soft);
}

.loop-step {
  display: none;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 40px;
  padding: 44px 48px;
}
.loop-step[data-current] {
  display: grid;
  animation: loop-step-in 420ms var(--ease-out-soft);
}
@keyframes loop-step-in {
  from { opacity: 0; transform: translateX(14px); }
  to   { opacity: 1; transform: translateX(0); }
}
.loop-step .step-figure {
  position: relative;
  display: grid; place-items: center;
  width: 120px; height: 120px;
}
.loop-step .step-figure .fig-ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--c) 40%, transparent);
}
.loop-step .step-figure .fig-ring.r2 { inset: 14px; border-color: color-mix(in srgb, var(--c) 24%, transparent); }
.loop-step .step-figure .fig-glow {
  position: absolute; inset: 22px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, color-mix(in srgb, var(--c) 80%, white) 0%, var(--c) 55%, color-mix(in srgb, var(--c) 55%, #000) 100%);
  box-shadow: 0 0 26px color-mix(in srgb, var(--c) 60%, transparent);
}
.loop-step .step-figure .fig-num {
  position: relative; z-index: 1;
  font-family: var(--font-display); font-weight: 400;
  font-size: 30px; color: #fff; line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 1px 6px rgba(0,0,0,0.35);
}
.loop-step .step-text { min-width: 0; }
.loop-step .step-kicker {
  font-family: var(--font-display); font-weight: 600;
  font-size: 10px; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--c);
  display: block; margin-bottom: 12px;
}
.loop-step .step-name {
  font-family: var(--font-display); font-weight: 400;
  font-size: clamp(26px, 3vw, 36px); letter-spacing: -0.02em; line-height: 1.08;
  color: var(--fg1);
  margin: 0 0 14px;
  text-wrap: balance;
}
.loop-step .step-detail {
  margin: 0;
  font-size: 16px; line-height: 1.62; color: var(--fg2); font-weight: 300;
  font-family: var(--font-body);
  text-wrap: pretty;
  max-width: 460px;
}
.loop-step .step-detail em { font-style: normal; color: var(--fg1); font-weight: 500; }

/* ---------- controls ---------- */
.loop-controls {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 24px;
  gap: 16px;
}
.loop-nav {
  display: inline-flex; align-items: center; gap: 10px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 999px;
  padding: 10px 18px;
  cursor: pointer;
  font-family: var(--font-display); font-weight: 500;
  font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--fg2);
  transition: border-color 240ms var(--ease-out-soft), color 240ms var(--ease-out-soft), background 240ms var(--ease-out-soft);
}
.loop-nav:hover {
  color: var(--fg1);
  border-color: color-mix(in srgb, var(--c) 50%, rgba(255,255,255,0.1));
  background: color-mix(in srgb, var(--c) 6%, transparent);
}
.loop-nav .nav-arrow { font-size: 14px; display: inline-block; transition: transform 240ms var(--ease-out-soft); }
.loop-nav.prev:hover .nav-arrow { transform: translateX(-3px); }
.loop-nav.next:hover .nav-arrow { transform: translateX(3px); }

.loop-counter {
  font-family: var(--font-display); font-weight: 400;
  font-size: 13px; letter-spacing: 0.16em;
  color: var(--fg3);
  font-variant-numeric: tabular-nums;
}
.loop-counter .cur { color: var(--c, var(--fg1)); transition: color 460ms var(--ease-out-soft); }

/* loop hint — appears on the last step's next button */
.loop[data-last] .loop-nav.next {
  border-color: color-mix(in srgb, var(--act-1) 45%, rgba(255,255,255,0.1));
  color: var(--act-1);
}

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .how-v3 .wrap-narrow { padding: 0 24px; }
  .loop-step { grid-template-columns: 1fr; gap: 24px; padding: 32px 26px; text-align: left; }
  .loop-step .step-figure { width: 88px; height: 88px; }
  .loop-step .step-figure .fig-num { font-size: 24px; }
  .loop-marker { width: 26px; height: 26px; font-size: 10px; }
}
@media (max-width: 560px) {
  .how-v3 { padding: 96px 0; }
  .loop-nav { padding: 9px 14px; font-size: 10px; letter-spacing: 0.12em; }
}

@media (prefers-reduced-motion: reduce) {
  .loop-step[data-current] { animation: none; }
  .loop-track::after, .loop-marker, .loop-stage::before, .loop-nav { transition: none !important; }
}