/* =========================================================
   THE ATLAS — editorial translation of the Demand Discovery
   expedition. Built strictly on Editorial Signal tokens.
   Cartography expressed as hairline linework + coordinates,
   never illustration. Sharp edges. No shadow. No gradient.
   ========================================================= */

/* ---------- Reset-ish app frame ---------- */
html, body { height: 100%; }
#root { min-height: 100%; }

*:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* A location that inverts to an ink "room" (Horizon, Constellation).
   We re-declare the palette locally so every token-driven child flips. */
.room-dark {
  --paper: #0A0A0A;
  --bone:  #141414;
  --fog:   #2E2E2E;
  --ash:   #8F8C85;
  --ink:   #F2F0EB;
  --ink-hover: #E0DED8;
  --signal: #E65A2F;
  --hover-overlay: rgba(242,240,235,0.06);
  --press-overlay: rgba(242,240,235,0.12);
  --bg: var(--paper);
  --fg1: var(--ink);
  --fg2: var(--ash);
  --rule-color: var(--ink);
  background: var(--paper);
  color: var(--fg1);
}

/* =========================================================
   STAGE — one location fills the viewport between the
   masthead and the trail.
   ========================================================= */
.stage {
  position: relative;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.stage__inner {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--max-content);
  margin: 0 auto;
  padding: clamp(24px, 4vh, 44px) var(--gutter) 168px;
  position: relative;
  z-index: 2;
}

/* Masthead — the editorial top rule + session chrome */
.masthead {
  position: relative;
  z-index: 5;
  border-top: var(--masthead-rule) solid var(--rule-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-3) var(--gutter);
  background: var(--bg);
}
.masthead__wordmark {
  font-family: var(--font-sans);
  font-weight: var(--fw-bold);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--fg1);
  white-space: nowrap;
}
.masthead__session {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg2);
}
.masthead__session b { color: var(--fg1); font-weight: var(--fw-medium); }
.session-dot {
  width: 7px; height: 7px; background: var(--signal);
  display: inline-block; margin-right: 7px; vertical-align: middle;
}

/* =========================================================
   TYPE HELPERS (atlas register)
   ========================================================= */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  text-transform: uppercase;
  letter-spacing: var(--track-eyebrow);
  color: var(--fg2);
  line-height: 1;
}
.coord {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fg2);
}
.serif {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.04;
}
.serif-i { font-family: var(--font-serif); font-style: italic; letter-spacing: 0; }

/* Location title block */
.loc-head { position: relative; margin-bottom: var(--sp-5); }
.loc-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fg2);
  display: flex; align-items: center; gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}
.loc-head__index .signal { color: var(--signal); }
.loc-head__title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(38px, 5.4vw, 60px);
  line-height: 1.0;
  letter-spacing: -0.01em;
  margin: 0 0 var(--sp-3);
  text-wrap: balance;
}
.loc-head__phase {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}
.loc-head__prompt {
  font-size: var(--fs-body-l);
  line-height: var(--lh-normal);
  color: var(--fg2);
  max-width: 60ch;
  margin-top: var(--sp-3);
}

/* The three progressive-revelation layers */
.layer-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg2);
  display: flex; align-items: center; gap: var(--sp-3);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--rule-color);
  margin-bottom: var(--sp-5);
}
.layer-tag .n { color: var(--signal); }

/* =========================================================
   CARTOGRAPHIC LINEWORK (background)
   Faint hairline survey field. Density controlled by tweak.
   ========================================================= */
.cartofield {
  position: absolute; inset: 0;
  z-index: 1; pointer-events: none;
  color: var(--fog);
}
.cartofield svg { width: 100%; height: 100%; display: block; }
.cartofield--off { display: none; }
.cartofield--faint { opacity: 0.26; }
.cartofield--present { opacity: 0.42; }

/* =========================================================
   EVIDENCE ARTIFACT — replaces "card".
   1px ink rectangle, paper/bone fill, no shadow, no radius.
   ========================================================= */
.artifact {
  position: relative;
  border: 1px solid var(--rule-color);
  background: var(--surface);
  padding: var(--sp-4);
  display: flex; flex-direction: column; gap: var(--sp-3);
  transition: transform var(--dur) var(--ease),
              background var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.artifact--bone { background: var(--bone); }
.artifact__meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg2);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-3);
}
.artifact__meta .src { color: var(--fg1); }
.artifact__body {
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--fg1);
}
.artifact__body.is-quote {
  font-family: var(--font-serif);
  font-size: 22px;
  line-height: 1.28;
}
.artifact__prov {
  margin-top: auto;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--rule-color);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg2);
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.artifact__prov .here { color: var(--signal); }

/* interactive states (no shadow — the system has none) */
.artifact.is-grab { cursor: grab; }
.artifact.is-grab:hover { transform: translateY(-2px); }
.artifact.is-selected {
  outline: 1px solid var(--rule-color);
  outline-offset: 4px;
}
.artifact.is-placed { background: var(--bone); }
.artifact .hl {
  background: transparent;
  border-bottom: 2px solid transparent;
  transition: border-color var(--dur-fast) var(--ease);
  cursor: text;
}
.artifact .hl.on { border-color: var(--signal); }
.artifact__pin {
  position: absolute; top: -1px; right: -1px;
  width: 0; height: 0;
  border-top: 16px solid var(--signal);
  border-left: 16px solid transparent;
  opacity: 0; transition: opacity var(--dur-fast) var(--ease);
}
.artifact.is-selected .artifact__pin { opacity: 1; }

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  font-family: var(--font-sans);
  font-size: 14px; font-weight: var(--fw-medium);
  letter-spacing: 0.01em;
  padding: 14px 22px;
  border: 1px solid var(--rule-color);
  background: transparent; color: var(--fg1);
  cursor: pointer; border-radius: 0;
  display: inline-flex; align-items: center; gap: 12px;
  transition: background var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease),
              opacity var(--dur-fast) var(--ease);
}
.btn:hover { background: var(--hover-overlay); }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--primary:hover { background: var(--ink-hover); }
.btn--signal { background: var(--signal); color: var(--paper); border-color: var(--signal); }
.btn--signal:hover { background: var(--signal); filter: brightness(1.05); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn--lg { padding: 18px 30px; font-size: 15px; }
.btn .arrow { font-size: 15px; line-height: 1; }

.linklike {
  font-family: var(--font-sans);
  font-size: 13px; font-weight: var(--fw-medium);
  color: var(--fg2); background: none; border: 0; cursor: pointer;
  padding: 4px 0; display: inline-flex; align-items: center; gap: 8px;
}
.linklike:hover { color: var(--fg1); }

/* =========================================================
   THE TRAIL — fixed bottom expedition path.
   ========================================================= */
.trail {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  background: var(--bg);
  border-top: 1px solid var(--rule-color);
}
.trail__inner {
  max-width: var(--max-content); margin: 0 auto;
  padding: var(--sp-3) var(--gutter) var(--sp-4);
  display: flex; flex-direction: column; gap: 10px;
}
.trail__narr {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 16px;
  color: var(--fg1);
  line-height: 1.2;
}
.trail__narr .muted { color: var(--fg2); font-style: normal;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; }
.trail__path {
  position: relative;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  align-items: center;
  padding-top: 14px;
}
.trail__line {
  position: absolute; left: 0; right: 0; top: 20px;
  height: 1px; background: var(--rule-soft);
}
.trail__node {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  background: none; border: 0; cursor: pointer; padding: 0;
  color: var(--fg2);
}
.trail__node:disabled { cursor: not-allowed; }
.trail__tick {
  width: 11px; height: 11px; border-radius: 0;
  border: 1px solid var(--rule-color);
  background: var(--bg);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.trail__node.done .trail__tick { background: var(--fg1); }
.trail__node.current .trail__tick {
  background: var(--signal); border-color: var(--signal);
  transform: scale(1.35);
}
.trail__node.future .trail__tick { background: var(--bg); border-color: var(--rule-soft); }
.trail__label {
  font-family: var(--font-mono);
  font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase;
  white-space: nowrap;
}
.trail__node.current .trail__label { color: var(--signal); }
.trail__node.done .trail__label { color: var(--fg1); }
.trail__node.future .trail__label { color: var(--fg3); }
.trail__node.future:hover .trail__label { color: var(--fg2); }
.trail__node.future:hover .trail__tick { border-color: var(--fg2); }
.trail__node:hover .trail__tick { transform: scale(1.15); }
.trail__node.current:hover .trail__tick { transform: scale(1.35); }

/* =========================================================
   FRICTION GATE — a required, sober interstitial.
   ========================================================= */
.gate {
  position: fixed; inset: 0; z-index: 60;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  padding: var(--gutter);
  animation: fadeRise var(--dur-slow) var(--ease) both;
}
.gate__inner { width: 100%; max-width: 880px; }
.gate__eyebrow {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--signal); margin-bottom: var(--sp-5);
}
.gate__q {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4.5vw, 52px);
  line-height: 1.05; margin-bottom: var(--sp-6);
  text-wrap: balance;
}
.gate__opts { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--rule-color); }
.gate__opt {
  text-align: left; background: none; border: 0;
  border-bottom: 1px solid var(--rule-color);
  padding: var(--sp-4) 0; cursor: pointer;
  display: flex; align-items: baseline; gap: var(--sp-4);
  color: var(--fg1);
  transition: padding var(--dur) var(--ease), color var(--dur) var(--ease);
}
.gate__opt:hover { padding-left: var(--sp-3); }
.gate__opt .mk {
  font-family: var(--font-mono); font-size: 12px; color: var(--fg2);
  letter-spacing: 0.1em; flex: 0 0 auto;
}
.gate__opt .tx { font-size: var(--fs-body-l); line-height: var(--lh-normal); }
.gate__opt.chosen { color: var(--signal); }
.gate__opt.chosen .mk { color: var(--signal); }

/* =========================================================
   MOTION — single fade-and-rise per screen. No stagger spam.
   ========================================================= */
@keyframes fadeRise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: no-preference) {
  .fade-rise { animation: fadeRise var(--dur-slow) var(--ease) both; }
  .fade-rise-2 { animation: fadeRise var(--dur-slow) var(--ease) 120ms both; }
  .fade-rise-3 { animation: fadeRise var(--dur-slow) var(--ease) 240ms both; }
}

/* =========================================================
   UTILITY GRID + misc
   ========================================================= */
.grid { display: grid; gap: var(--sp-4); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.divider { border: 0; border-top: 1px solid var(--rule-color); margin: var(--sp-6) 0; }
.divider-soft { border-top-color: var(--rule-soft); }
.pull {
  border-left: var(--rule-thick) solid var(--rule-color);
  padding: 4px var(--sp-4);
  font-size: var(--fs-body-l); line-height: var(--lh-normal);
  max-width: var(--measure);
}
.signal-word { color: var(--signal); }
.measure { max-width: var(--measure); }
.stack > * + * { margin-top: var(--sp-4); }
.row { display: flex; align-items: center; gap: var(--sp-4); flex-wrap: wrap; }

/* scrollbars kept quiet */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--fog); }
::-webkit-scrollbar-track { background: transparent; }