/* ============================================================
   THE FRONTIER STACK — graph module styles
   A single object with two morphing modes (Stack ⇄ Flat).
   Pure CSS 3D (no WebGL). Driven by js/frontier-stack.js + data.
   Honest morph: dots keep identical tier-x positions in both modes;
   only the layer planes transform.
   ============================================================ */

.frontier-stack-mount { position: relative; }

.fs-graph {
  /* layout constants shared with the JS (dots use %, so they are
     resolution-independent). Flat is the single view — no Stack / 3D / morph. */
  --layer-h: 98px;
  --flat-gap: 38px;
  --head-h: 30px;
  --gutter: 98px;   /* dedicated left lane for the sector label (name + count) */

  position: relative;
  height: 576px;
  user-select: none;
}

/* The scene holds the four stacked rows (Materials bottom → Space top) */
.fs-scene {
  position: absolute;
  left: 56px; right: 14px;
  top: calc(var(--head-h) + 8px);
  height: calc(var(--layer-h) * 4 + var(--flat-gap) * 3);
}

/* ---------- A layer plane (a flat row) ---------- */
.fs-layer {
  position: absolute;
  left: 0; right: 0; top: 0;
  height: var(--layer-h);
  transform: translateY(calc((3 - var(--i)) * (var(--layer-h) + var(--flat-gap))));
}

.fs-layer-plane {
  position: absolute; inset: 0;
  border-radius: 10px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--hue) 14%, transparent), color-mix(in srgb, var(--hue) 4%, transparent));
  border: 1px solid color-mix(in srgb, var(--hue) 34%, transparent);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--hue) 18%, transparent);
  overflow: hidden;
}
/* faint tier gridlines — only across the plot area (right of the gutter) */
.fs-layer-plane::before {
  content: '';
  position: absolute; left: var(--gutter); right: 0; top: 0; bottom: 0;
  background-image: repeating-linear-gradient(
    90deg,
    transparent 0,
    transparent calc(100% / 8 - 1px),
    rgba(240,236,224,.07) calc(100% / 8 - 1px),
    rgba(240,236,224,.07) calc(100% / 8)
  );
  pointer-events: none;
}
/* divider between the label gutter and the plot grid */
.fs-layer-plane::after {
  content: '';
  position: absolute; left: var(--gutter); top: 8%; bottom: 8%; width: 1px;
  background: color-mix(in srgb, var(--hue) 26%, transparent);
  pointer-events: none;
}
/* ---------- Sector label (in the dedicated left gutter): name + asset count ---------- */
.fs-layer-panel {
  position: absolute;
  left: 7px; top: 50%;
  width: calc(var(--gutter) - 14px);
  transform: translateY(-50%);
  display: flex; flex-direction: column; gap: 4px;
  padding: .45rem .55rem;
  background: rgba(8,9,12,.62);
  border: 1px solid rgba(240,236,224,.12);
  border-left: 2px solid var(--hue);
  border-radius: 7px;
  backdrop-filter: blur(2px);
  pointer-events: none;
  z-index: 4;
}
.fs-panel-name { font-family: 'Space Grotesk', sans-serif; font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--hue); }
.fs-panel-count { font-family: 'Space Grotesk', sans-serif; font-size: 10px; color: #B4AFA4; letter-spacing: .02em; }

/* ---------- Dots (plotted in the tier-column area, right of the gutter) ---------- */
.fs-dots { position: absolute; left: var(--gutter); right: 0; top: 0; bottom: 0; z-index: 3; }
.fs-dot {
  position: absolute;
  width: var(--d, 7px); height: var(--d, 7px);
  margin: calc(var(--d, 7px) / -2) 0 0 calc(var(--d, 7px) / -2);
  border-radius: 50%;
  background: var(--cc);
  box-shadow: 0 0 var(--glow, 4px) var(--cc);
  border: none; padding: 0;
  cursor: pointer;
  transition: opacity .35s, transform .15s, box-shadow .15s;
}
.fs-dot:hover { transform: scale(1.55); box-shadow: 0 0 12px var(--cc); z-index: 6; }

/* tier-lens highlight (hovering a flat tier header) */
.fs-graph.is-lensing .fs-dot { opacity: .14; }
.fs-graph.is-lensing .fs-dot.fs-lit { opacity: 1; transform: scale(1.25); }

/* research highlight (article → cells) */
.fs-graph.is-highlighting .fs-dot { opacity: .1; }
.fs-graph.is-highlighting .fs-dot.fs-hit { opacity: 1; transform: scale(1.3); box-shadow: 0 0 12px var(--cc); }
.fs-graph.is-highlighting .fs-layer-plane { opacity: .5; }
.fs-graph.is-highlighting .fs-layer.fs-hit-layer .fs-layer-plane { opacity: 1; border-color: color-mix(in srgb, var(--hue) 70%, transparent); }

/* selected dot (doorway open) */
.fs-dot.fs-selected { transform: scale(1.7); box-shadow: 0 0 0 3px rgba(245,217,33,.85), 0 0 14px var(--cc); z-index: 7; }

/* ---------- Disruption overlay ---------- */
.fs-layer-overlay {
  position: absolute; inset: 0;
  border-radius: 10px;
  pointer-events: none;
  z-index: 5;
  opacity: 0;
  background: radial-gradient(120% 140% at 50% 100%, rgba(220,74,74,.9), rgba(224,112,61,.35) 60%, transparent 80%);
  transition: opacity .5s ease;
}
.fs-graph.is-disrupting .fs-layer-overlay { opacity: var(--sev, 0); }

/* origin pulse ring */
@keyframes fsBurst { 0% { opacity:.9; transform: scale(.2);} 100% { opacity:0; transform: scale(2.4);} }
.fs-burst {
  position: absolute; width: 28px; height: 28px; margin: -14px 0 0 -14px;
  border-radius: 50%; border: 2px solid var(--c-crit, #DC4A4A);
  z-index: 8; pointer-events: none;
  animation: fsBurst .9s ease-out forwards;
}

/* ---------- Flat-mode chrome: tier headers + Y axis + flow ---------- */
.fs-tier-headers {
  position: absolute;
  left: calc(56px + var(--gutter)); right: 14px; top: 0;
  height: var(--head-h);
  display: grid; grid-template-columns: repeat(8, 1fr);
  opacity: 0; transition: opacity .45s; pointer-events: none;
}
.fs-graph.is-flat .fs-tier-headers { opacity: 1; pointer-events: auto; }
.fs-tier-header {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 9px; font-weight: 600; letter-spacing: .03em;
  color: #B7B1A6; text-transform: uppercase;
  text-align: center; line-height: 1.1;
  display: flex; align-items: center; justify-content: center;
  padding: 0 2px; cursor: default;
  border-bottom: 1px solid transparent;
  transition: color .15s, border-color .15s;
}
.fs-tier-header:hover { color: #F5D921; border-bottom-color: #F5D921; }
.fs-tier-num { display: none; }

.fs-yaxis {
  position: absolute; left: 0; top: var(--head-h); bottom: 0; width: 52px;
  opacity: 0; transition: opacity .45s; pointer-events: none;
}
.fs-graph.is-flat .fs-yaxis { opacity: 1; }
/* a single upward arrow spanning the stack — value flows up (Materials → Space).
   Within-layer vertical position is NOT a quantitative axis on this view. */
.fs-yaxis-arrow {
  position: absolute; left: 34px; top: 5%; bottom: 7%; width: 1.5px; margin-left: -.75px;
  background: linear-gradient(to top, rgba(183,177,166,.16), rgba(183,177,166,.85));
  border-radius: 2px;
}
.fs-yaxis-arrow::before {
  content: ''; position: absolute; top: -5px; left: 50%; transform: translateX(-50%);
  border-left: 4px solid transparent; border-right: 4px solid transparent;
  border-bottom: 7px solid #C6C0B4;
}
.fs-yaxis-cap {
  position: absolute; left: 13px; top: 50%;
  transform: translate(-50%, -50%) rotate(-90deg); transform-origin: center;
  font-family: 'Space Grotesk', sans-serif; font-size: 8.5px; font-weight: 600;
  letter-spacing: .22em; text-transform: uppercase; color: #918B81; white-space: nowrap;
}

/* ============================================================
   DOORWAY PANEL — right slide-in
   ============================================================ */
.fs-doorway {
  position: fixed; top: 0; right: 0; bottom: 0;
  width: 380px; max-width: 92vw;
  background: #0F1115;
  border-left: 1px solid rgba(240,236,224,.18);
  box-shadow: -24px 0 60px rgba(0,0,0,.55);
  z-index: 1100;
  transform: translateX(100%);
  transition: transform .35s cubic-bezier(.4,0,.2,1);
  display: flex; flex-direction: column;
  font-family: 'Mulish', sans-serif;
}
.fs-doorway.is-open { transform: translateX(0); }
.fs-doorway-scroll { overflow-y: auto; padding: 1.25rem 1.35rem 2rem; }
.fs-dw-close {
  position: absolute; top: 12px; right: 14px;
  background: none; border: none; color: #9C978E; font-size: 20px; cursor: pointer; line-height: 1; z-index: 2;
}
.fs-dw-close:hover { color: #EDE9DF; }
.fs-dw-eyebrow { font-family: 'Space Grotesk', sans-serif; font-size: 9.5px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
.fs-dw-title { font-family: 'Space Grotesk', sans-serif; font-size: 1.3rem; font-weight: 700; color: #EDE9DF; margin: .35rem 0 0; line-height: 1.15; }
.fs-dw-meta { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .7rem; }
.fs-dw-chip { font-family: 'Space Grotesk', sans-serif; font-size: 9.5px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; padding: 3px 8px; border-radius: 5px; border: 1px solid rgba(240,236,224,.18); color: #9C978E; }
.fs-dw-chip.crit { color: #0A0A0F; }
.fs-dw-section-label { font-family: 'Space Grotesk', sans-serif; font-size: 9.5px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: #5F5B53; margin: 1.3rem 0 .55rem; }
.fs-dw-samples { font-family: 'Mulish', sans-serif; font-size: 12.5px; color: #EDE9DF; line-height: 1.5; }

/* nine ledger layers */
.fs-dw-ledger { display: flex; flex-direction: column; gap: 4px; }
.fs-ledger-row { display: flex; align-items: center; gap: .55rem; padding: .5rem .6rem; border-radius: 7px; background: #15171C; border: 1px solid rgba(240,236,224,.08); }
.fs-ledger-row.paid { opacity: .72; }
.fs-ledger-name { font-family: 'Space Grotesk', sans-serif; font-size: 12px; font-weight: 600; color: #EDE9DF; }
.fs-ledger-blurb { font-family: 'Mulish', sans-serif; font-size: 10.5px; color: #9C978E; }
.fs-ledger-lock { margin-left: auto; font-family: 'Space Grotesk', sans-serif; font-size: 8px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; padding: 2px 6px; border-radius: 4px; }
.fs-ledger-lock.free { color: #3FB68F; border: 1px solid rgba(63,182,143,.4); }
.fs-ledger-lock.paid { color: #5F5B53; border: 1px solid rgba(240,236,224,.18); }

.fs-dw-actions { display: flex; flex-direction: column; gap: .55rem; margin-top: 1.3rem; }
.fs-dw-btn { font-family: 'Space Grotesk', sans-serif; font-size: 12px; font-weight: 600; text-align: center; padding: .65rem; border-radius: 7px; cursor: pointer; border: none; text-decoration: none; }
.fs-dw-btn.primary { background: #F5D921; color: #0A0A0F; }
.fs-dw-btn.primary:hover { background: #FFE74A; }
.fs-dw-btn.ghost { background: transparent; border: 1px solid rgba(240,236,224,.18); color: #EDE9DF; }
.fs-dw-btn.ghost:hover { border-color: #DC4A4A; color: #DC4A4A; }

/* per-layer severity readout */
.fs-dw-cascade { margin-top: 1.1rem; display: none; }
.fs-dw-cascade.is-shown { display: block; }
.fs-cascade-row { display: grid; grid-template-columns: 84px 1fr 38px; align-items: center; gap: .5rem; margin-bottom: .4rem; }
.fs-cascade-name { font-family: 'Space Grotesk', sans-serif; font-size: 10.5px; color: #EDE9DF; }
.fs-cascade-bar { height: 7px; border-radius: 4px; background: #15171C; overflow: hidden; }
.fs-cascade-fill { height: 100%; border-radius: 4px; transition: width .6s ease; }
.fs-cascade-pct { font-family: 'Space Grotesk', sans-serif; font-size: 10px; color: #9C978E; text-align: right; font-variant-numeric: tabular-nums; }

.fs-doorway-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.35);
  z-index: 1099; opacity: 0; pointer-events: none; transition: opacity .35s;
}
.fs-doorway-backdrop.is-open { opacity: 1; pointer-events: auto; }

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .fs-graph { height: 532px; --layer-h: 88px; --flat-gap: 34px; --gutter: 92px; }
}
@media (max-width: 640px) {
  .fs-graph { height: 452px; --layer-h: 74px; --flat-gap: 26px; --gutter: 76px; }
  .fs-scene { left: 40px; }
  .fs-tier-headers { left: calc(40px + var(--gutter)); }
  .fs-tier-header { font-size: 7.5px; }
  .fs-yaxis { width: 40px; }
  .fs-yaxis-arrow { left: 26px; }
  .fs-yaxis-cap { left: 11px; }
}

/* ============================================================
   prefers-reduced-motion — disable cascade fade + burst (brief §3 / §9).
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .fs-dot, .fs-doorway, .fs-cascade-fill, .fs-layer-overlay { transition: none !important; }
  .fs-burst { animation: none !important; display: none; }
}