/* ============================================================
   journey.css — Landing page journey map (see journey.js)
   How Physics Works
   ============================================================ */

.journey {
  position: relative;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--page-padding);
  margin-top: calc(-1 * var(--space-4));
  margin-bottom: var(--space-12);
}

/* Skip link: hidden until focused */
.journey__skip {
  position: absolute;
  left: var(--page-padding);
  z-index: 5;
  padding: 0.6rem 1rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: var(--text-sm);
  color: var(--color-void);
  background: var(--color-gold);
  border-radius: var(--radius-md);
  opacity: 0;
  pointer-events: none;
}
.journey__skip:focus,
.journey__skip:focus-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ── Head: title + legend + continue ───────────────────── */
.journey__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4) var(--space-8);
  flex-wrap: wrap;
  margin-bottom: var(--space-2);
}

.journey__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-1);
}

.journey__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-text-primary);
}
.journey__count {
  color: var(--color-gold);
  font-weight: 700;
}

.journey__side {
  display: flex;
  align-items: center;
  gap: var(--space-3) var(--space-6);
  flex-wrap: wrap;
}

.journey__legend {
  list-style: none;
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}
.journey__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.journey__legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1.5px solid var(--color-text-secondary);
}
.journey__legend-item.is-visited .journey__legend-dot {
  background: var(--color-text-primary);
  border-color: var(--color-text-primary);
  box-shadow: 0 0 8px oklch(1 0 0 / 0.6);
}
.journey__legend-item.is-next .journey__legend-dot {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 2.5px var(--color-void), 0 0 0 4px var(--color-gold);
}

.journey__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 44px;
  max-width: 100%;
  padding: 0.45rem 0.9rem 0.45rem 1rem;
  border: 1px solid oklch(from var(--color-gold) l c h / 0.55);
  border-radius: 999px;
  background: oklch(from var(--color-gold) l c h / 0.08);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.journey__cta[href]:hover {
  background: oklch(from var(--color-gold) l c h / 0.16);
  border-color: var(--color-gold);
}
.journey__cta-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.journey__cta-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c, var(--color-text-secondary));
}
.journey__cta-title {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.journey__cta-arrow {
  color: var(--color-gold);
  transition: transform var(--transition-fast);
}
.journey__cta[href]:hover .journey__cta-arrow { transform: translateX(3px); }

/* ── Stage and scroller ─────────────────────────────────── */
.journey__stage {
  position: relative;
}

.journey__scroller {
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  scrollbar-color: oklch(1 0 0 / 0.18) transparent;
  overscroll-behavior-x: contain;
}
.journey:not(.is-scroll) .journey__scroller { overflow: visible; }

.journey__svg {
  display: block;
  max-width: none;
  height: auto;
  overflow: visible;
  -webkit-tap-highlight-color: transparent;
}

/* ── SVG: bands, road, axis ─────────────────────────────── */
.jm-nebula { opacity: 0.32; }

.jm-era__label {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.jm-road__glow {
  fill: none;
  stroke-width: 16;
  stroke-opacity: 0.13;
  stroke-linecap: butt;
}
.jm-road__core {
  fill: none;
  stroke-width: 1.6;
  stroke-opacity: 0.75;
  stroke-linecap: butt;
}
.jm-road__gap {
  fill: none;
  stroke: var(--color-text-muted);
  stroke-width: 1.4;
  stroke-dasharray: 2 5;
  stroke-linecap: round;
}
.jm-break {
  fill: none;
  stroke: var(--color-text-secondary);
  stroke-width: 1.4;
  stroke-linecap: round;
}

.jm-axis__line {
  stroke-width: 1;
  stroke-opacity: 0.35;
}
.jm-axis__tick,
.jm-axis__sep {
  stroke: oklch(1 0 0 / 0.38);
  stroke-width: 1;
}
.jm-axis__sep { stroke: oklch(1 0 0 / 0.55); }
.jm-axis__label,
.jm-gap__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  fill: var(--color-text-secondary);
}
.jm-gap__label {
  font-style: italic;
  fill: var(--color-text-muted);
}

.jm-stem {
  stroke-width: 1;
  stroke-opacity: 0.4;
}
.jm-stem__foot { fill-opacity: 0.8; }

/* ── Nodes ──────────────────────────────────────────────── */
.jm-node { cursor: pointer; }
.jm-node:focus,
.jm-node:focus-visible { outline: none; }
.jm-node__hit { fill: transparent; }

.jm-node__dot {
  fill: oklch(from var(--c) 0.2 calc(c * 0.5) h);
  stroke: var(--c);
  stroke-width: 1.6;
  transition: transform var(--transition-fast);
  transform-box: fill-box;
  transform-origin: center;
}
.jm-node.is-visited .jm-node__dot {
  fill: var(--c);
  stroke: oklch(from var(--c) calc(l + 0.12) c h);
}
.jm-node__core { fill: oklch(0.98 0.02 90); }

.jm-node__ring {
  fill: none;
  stroke: var(--color-gold);
  stroke-width: 1.6;
}
.jm-node__pulse {
  fill: none;
  stroke: var(--color-gold);
  stroke-width: 1.2;
  transform-box: fill-box;
  transform-origin: center;
  animation: jm-pulse 2.6s ease-out infinite;
}
@keyframes jm-pulse {
  0%   { transform: scale(0.8); opacity: 0.85; }
  100% { transform: scale(2.1); opacity: 0; }
}

.jm-node__focus {
  fill: none;
  stroke: var(--color-gold);
  stroke-width: 2;
  opacity: 0;
}
.jm-node:focus-visible .jm-node__focus { opacity: 1; }
/* hover is driven by the nearest-node logic (is-active), since hit circles may overlap */
.jm-node.is-active .jm-node__dot { transform: scale(1.45); }

/* ── Card ───────────────────────────────────────────────── */
.journey__card {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 4;
  width: max-content;
  max-width: min(300px, calc(100% - 8px));
  padding: 0.75rem 0.95rem 0.8rem;
  border-radius: var(--radius-md);
  background: oklch(0.13 0.005 90 / 0.94);
  border: 1px solid oklch(from var(--c, var(--color-gold)) l c h / 0.45);
  box-shadow: var(--shadow-lg), 0 0 24px oklch(from var(--c, var(--color-gold)) l c h / 0.14);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.14s ease, transform 0.14s ease, visibility 0s linear 0.14s;
}
.journey__card.is-shown {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity 0.14s ease, transform 0.14s ease;
}
.journey__card.is-pinned { pointer-events: auto; }
.journey__card::after {
  content: '';
  position: absolute;
  left: var(--arrow-x, 50%);
  bottom: -6px;
  width: 10px;
  height: 10px;
  margin-left: -5px;
  background: inherit;
  border-right: 1px solid oklch(from var(--c, var(--color-gold)) l c h / 0.45);
  border-bottom: 1px solid oklch(from var(--c, var(--color-gold)) l c h / 0.45);
  transform: rotate(45deg);
  backdrop-filter: none;
}
.journey__card.is-below::after {
  bottom: auto;
  top: -6px;
  transform: rotate(225deg);
}

.journey__card-meta {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
}
.journey__card-num { color: var(--c); font-weight: 600; }
.journey__card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-text-primary);
  margin-top: 0.2rem;
}
.journey__card-sci {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: 0.15rem;
}
.journey__card-foot {
  display: flex;
  justify-content: space-between;
  gap: 0.9rem;
  margin-top: 0.5rem;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.journey__card-era { color: var(--c); }
.journey__card-status.is-visited { color: var(--color-text-primary); }
.journey__card-status.is-visited::before { content: '\2713\00a0'; color: var(--c); }
.journey__card-open {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 0.6rem;
  border-radius: var(--radius-sm);
  background: oklch(from var(--c, var(--color-gold)) l c h / 0.16);
  border: 1px solid oklch(from var(--c, var(--color-gold)) l c h / 0.5);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  text-decoration: none;
}

.journey__foot {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2) var(--space-8);
  flex-wrap: wrap;
  margin-top: var(--space-2);
}
.journey__foot .journey__legend { flex-shrink: 0; padding-top: 0.1rem; }
.journey__note {
  max-width: 78ch;
  font-size: var(--text-xs);
  line-height: 1.55;
  color: var(--color-text-muted);
}

/* ── Phone: horizontally scrolling road ─────────────────── */
.journey.is-compact .journey__stage { margin-inline: calc(-1 * var(--page-padding)); }
.journey__hint { display: none; color: var(--color-text-secondary); }
.journey.is-scroll .journey__hint { display: inline; }
.journey.is-scroll .journey__scroller {
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 18px, #000 calc(100% - 28px), transparent 100%);
          mask-image: linear-gradient(90deg, transparent 0, #000 18px, #000 calc(100% - 28px), transparent 100%);
}

@media (max-width: 699px) {
  .journey { margin-top: 0; }
  .journey__head { align-items: flex-start; }
  .journey__side { width: 100%; }
  .journey__cta { width: 100%; }
  .journey__cta-title { white-space: normal; text-wrap: balance; line-height: 1.15; }
  .jm-era__label { font-size: 18px; }
  .jm-axis__label, .jm-gap__label { font-size: 12px; }
}

/* ── Reduced motion ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .jm-node__pulse { animation: none; opacity: 0; }
  .jm-node__dot,
  .journey__card,
  .journey__card.is-shown,
  .journey__cta,
  .journey__cta-arrow { transition: none; }
}