:root {
  --teal: #3e7e88; --teal-bright: #41beb9; --saffron: #fcd867;
  --plum: #5b2547; --cyan: hsl(195.3, 65.7%, 48%);
  --ink: #23202b; --paper: #f7f3e9;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font-family: system-ui, sans-serif; background: var(--paper); color: var(--ink); }
#app { height: 100%; }

/* ── Shared UI (public/js/screens.js + main.js orchestrator) ─────────────── */
.btn {
  font: 800 17px system-ui, sans-serif; border: none; border-radius: 10px;
  padding: 14px 28px; cursor: pointer; touch-action: manipulation;
}
.btn-primary { background: var(--plum); color: var(--paper); }
.btn-primary:active { background: var(--saffron); color: var(--plum); }
.btn-secondary { background: var(--teal); color: var(--paper); }
.btn-secondary:active { background: var(--teal-bright); }

.screen {
  height: 100%; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 18px;
  padding: 32px; text-align: center; box-sizing: border-box;
}
.screen-title { font: 800 26px system-ui, sans-serif; color: var(--plum); margin: 0; }
.loading-screen { color: var(--teal); font: 700 16px system-ui, sans-serif; }
.loading-screen--error { color: #c23b3b; }

/* Title screen */
.title-kicker {
  font: 700 13px system-ui, sans-serif; text-transform: uppercase; letter-spacing: .22em;
  color: var(--teal);
}
.title-hero { font: 900 46px system-ui, sans-serif; color: var(--plum); margin: 0; line-height: 1.05; }
.title-sub { max-width: 30ch; font: 400 16px/1.5 system-ui, sans-serif; color: var(--ink); opacity: 0.85; margin: 0; }

/* Region picker */
.region-grid { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.region-card {
  display: flex; flex-direction: column; gap: 4px; align-items: flex-start;
  min-width: 200px; padding: 20px 22px; text-align: left; cursor: pointer;
  background: var(--paper); border: 2px solid var(--teal); border-radius: 14px;
}
.region-card:active { border-color: var(--saffron); }
.region-card-name { font: 800 20px system-ui, sans-serif; color: var(--plum); }
.region-card-sub { font: 400 13px system-ui, sans-serif; color: var(--ink); opacity: 0.75; }

/* Celebration overlay (public/js/screens.js renderCelebration) — a confetti
   burst behind a centered card. The whole screen is one root.innerHTML swap
   like every other screen, so nothing (confetti included) survives past the
   next render; the CSS animations carry no JS timers to leak either way. */
.celebrate-screen {
  position: relative; overflow: hidden;
  background: radial-gradient(circle at 50% 15%, #ffffff22, transparent 60%), var(--plum);
}
.celebrate-confetti {
  position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0;
}
.confetti-piece {
  position: absolute; opacity: 0.95;
  animation-name: confetti-fall; animation-timing-function: ease-in-out;
  animation-iteration-count: infinite; animation-direction: alternate;
}
@keyframes confetti-fall {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(var(--confetti-drift), 18vh) rotate(360deg); }
}
.celebrate-card {
  position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 18px;
  background: var(--paper); border: 3px solid var(--saffron); border-radius: 20px;
  padding: 40px 44px; box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}
.celebrate-badge {
  width: 92px; height: 92px; border-radius: 50%; display: grid; place-items: center;
  background: var(--saffron); color: var(--plum); font-size: 48px;
  box-shadow: 0 0 0 8px rgba(252, 216, 103, 0.3);
}
.celebrate-title { font: 900 34px system-ui, sans-serif; color: var(--plum); margin: 0; }
.celebrate-sub { max-width: 34ch; font: 400 16px/1.5 system-ui, sans-serif; color: var(--ink); opacity: 0.85; margin: 0; }

/* ── Level layout (main.js runLevel) ─────────────────────────────────────── */
.level { display: grid; grid-template-columns: 1fr minmax(320px, 400px); height: 100%; }
.level-map { position: relative; min-width: 0; }
.level-side {
  display: flex; flex-direction: column; gap: 14px; padding: 18px;
  overflow-y: auto; background: #efe8d6; border-left: 2px solid var(--teal);
}
.side-head { display: flex; flex-direction: column; gap: 2px; }
.side-title { font: 800 13px system-ui, sans-serif; text-transform: uppercase; letter-spacing: .05em; color: var(--teal); }
.side-route { font: 800 18px system-ui, sans-serif; color: var(--plum); }
.side-window { font: 600 14px "Courier New", monospace; color: var(--ink); }

.side-clocks { display: flex; gap: 16px; }
.side-clock-item { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.side-clock-item .clock-svg { width: 130px; height: 130px; }
.side-clock-item .clock-digital { font-size: 12px; padding: 2px 8px; }
.side-clock-label {
  font: 700 11px system-ui, sans-serif; text-transform: uppercase; letter-spacing: .06em;
  color: var(--plum); opacity: 0.8;
}

/* Route-choice buttons */
.side-routes { display: flex; flex-direction: column; gap: 8px; }
.route-choice {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
  text-align: left; padding: 10px 14px; cursor: pointer;
  background: var(--paper); border: 2px solid var(--teal); border-radius: 10px;
}
.route-choice--selected { border-color: var(--saffron); background: #fff6dd; }
.route-choice[disabled] { opacity: 0.5; cursor: default; }
.route-choice-name { font: 800 15px system-ui, sans-serif; color: var(--plum); }
.route-choice-sub { font: 500 12px system-ui, sans-serif; color: var(--ink); opacity: 0.75; }

/* Level caption banner (overlaid top of the map) + controls/hint */
.level-caption {
  position: absolute; top: 16px; left: 16px; max-width: min(70%, 420px);
  font: 700 15px system-ui, sans-serif; color: var(--paper);
  background: var(--plum); border-radius: 8px; padding: 8px 14px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2); pointer-events: none;
}
.side-panel-host .puzzle-panel { padding: 0; max-width: none; }
.side-controls { display: flex; flex-direction: column; gap: 10px; align-items: stretch; }
.controls-note { font: 500 13px/1.4 system-ui, sans-serif; color: var(--ink); opacity: 0.8; }
.side-hint { font: 700 14px/1.4 system-ui, sans-serif; color: #a4442f; display: none; }

/* Selected alternate reads as the dispatched route (solid saffron). */
.map-route.dim { opacity: 0.3; }
.map-route.alt.chosen { stroke: var(--saffron); stroke-dasharray: none; stroke-width: 5; opacity: 1; }

/* Map layer (public/js/map.js) */
.map-svg { display: block; width: 100%; height: 100%; background: var(--paper); cursor: grab; }
.map-svg:active { cursor: grabbing; }
.map-outline { fill: var(--teal-bright); fill-opacity: 0.18; stroke: var(--teal); stroke-width: 1.5; }
.map-river { fill: none; stroke: var(--cyan); stroke-width: 1.25; stroke-opacity: 0.6; stroke-linecap: round; stroke-linejoin: round; }
.map-station-dot { fill: var(--plum); stroke: var(--paper); stroke-width: 1.5; }
.map-station-label {
  fill: var(--ink); font: 12px system-ui, sans-serif; font-weight: 600;
  paint-order: stroke; stroke: var(--paper); stroke-width: 3px;
}
.map-route { stroke: var(--saffron); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.map-route.alt { stroke: var(--cyan); stroke-dasharray: 6 5; }
.map-scale-line, .map-scale-tick { stroke: var(--ink); stroke-width: 2; }
.map-scale-label { fill: var(--ink); font: 12px system-ui, sans-serif; }

/* Wrapper stacking a map `<svg>` with an overlaid tool `<svg>` (e.g. the ruler) */
.map-wrap { position: relative; width: 100%; height: 100%; }

/* Ruler tool (public/js/tools/ruler.js) — overlaid above the map; only its
   own handles/body are interactive so map pan/zoom still works underneath. */
.ruler-svg { position: absolute; inset: 0; pointer-events: none; }
.ruler-tool { cursor: grab; }
.ruler-body { stroke: var(--ink); stroke-width: 5; stroke-linecap: round; pointer-events: none; }
.ruler-body-hit { stroke: transparent; stroke-width: 20; pointer-events: auto; cursor: grab; touch-action: none; }
.ruler-tick { stroke: var(--ink); stroke-width: 1.5; pointer-events: none; }
.ruler-tick-major { stroke-width: 2.5; }
.ruler-handle { fill: var(--saffron); stroke: var(--ink); stroke-width: 2; pointer-events: auto; cursor: grab; touch-action: none; }
.ruler-readout {
  fill: var(--plum); font: 700 13px system-ui, sans-serif; text-anchor: middle;
  paint-order: stroke; stroke: var(--paper); stroke-width: 4px;
}
.ruler-broken-mark { fill: none; stroke: var(--ink); stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; pointer-events: none; }

/* Train sprite + journey clock (public/js/train.js) — sprite overlaid above
   the map like the ruler, so `map.stationPt()`'s zoom/pan-adjusted output
   maps directly onto it. */
.train-svg { position: absolute; inset: 0; pointer-events: none; }
.train-sprite-body { fill: var(--plum); stroke: var(--saffron); stroke-width: 2; }
.train-sprite-dot { fill: var(--saffron); }
.train-clock-label {
  position: absolute; top: 16px; right: 16px; font: 700 16px "Courier New", monospace;
  letter-spacing: 1px; color: var(--plum); background: var(--paper);
  border: 2px solid var(--plum); border-radius: 6px; padding: 6px 12px;
}

/* Analog clock tool (public/js/tools/clock.js) */
.clock { display: inline-flex; flex-direction: column; align-items: center; gap: 10px; }
.clock-svg { width: 220px; height: 220px; }
.clock-face { fill: var(--plum); stroke: var(--saffron); stroke-width: 4; }
.clock-face-inner-ring { fill: none; stroke: var(--teal); stroke-width: 1.5; }
.clock-tick-hour { stroke: var(--saffron); stroke-width: 3; stroke-linecap: round; }
.clock-tick-minute { stroke: var(--paper); stroke-opacity: 0.4; stroke-width: 1.5; stroke-linecap: round; }
.clock-number {
  fill: var(--paper); font: 700 15px system-ui, sans-serif;
  text-anchor: middle; dominant-baseline: central;
}
.clock-hand-hour { stroke: var(--paper); stroke-width: 6; stroke-linecap: round; }
.clock-hand-minute { stroke: var(--saffron); stroke-width: 4; stroke-linecap: round; }
.clock-hub { fill: var(--saffron); stroke: var(--plum); stroke-width: 1.5; }
.clock-hit { fill: transparent; pointer-events: none; }
.clock--select .clock-hit { pointer-events: all; cursor: pointer; touch-action: none; }
.clock-digital {
  font: 700 14px/1 "Courier New", monospace; letter-spacing: 1px; color: var(--ink);
  background: var(--paper); border: 2px solid var(--plum); border-radius: 4px; padding: 3px 10px;
}

/* Puzzle panel (public/js/puzzle-panel.js) */
.puzzle-panel {
  display: flex; flex-direction: column; gap: 16px;
  width: 100%; max-width: 380px; margin: 0 auto; padding: 20px;
  box-sizing: border-box;
}
.puzzle-card { border-radius: 12px; padding: 14px 18px; }
.puzzle-card-label {
  font: 700 11px system-ui, sans-serif; text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: 6px; opacity: 0.8;
}
.puzzle-formula-card { background: var(--paper); border: 2px solid var(--teal); color: var(--plum); }
.puzzle-formula-card .puzzle-card-label { color: var(--teal); }
.puzzle-formula-text { font: 800 22px system-ui, sans-serif; }

.puzzle-worked-card { background: var(--plum); border: 2px solid var(--saffron); color: var(--paper); }
.puzzle-worked-card .puzzle-card-label { color: var(--saffron); }
.puzzle-worked-lines { display: flex; flex-direction: column; }
.puzzle-worked-line {
  font: 600 15px "Courier New", monospace; padding: 6px 0;
  border-bottom: 1px dashed rgba(247, 243, 233, 0.25);
}
.puzzle-worked-line:last-child { border-bottom: none; }
.puzzle-worked-line--verdict { color: var(--saffron); font-weight: 800; padding-top: 10px; }

.puzzle-input-row { display: flex; align-items: stretch; gap: 10px; }
.puzzle-display {
  flex: 1; font: 800 30px "Courier New", monospace; text-align: right;
  background: var(--paper); color: var(--ink); border: 2px solid var(--plum); border-radius: 10px;
  padding: 10px 16px; min-height: 1.3em; transition: border-color 0.15s;
}
.puzzle-display--placeholder { color: var(--ink); opacity: 0.4; }
.puzzle-display--error { border-color: #c23b3b; animation: puzzle-shake 0.45s; }
.puzzle-unit-chip {
  align-self: center; font: 700 14px system-ui, sans-serif; white-space: nowrap;
  background: var(--saffron); color: var(--plum); border-radius: 999px; padding: 8px 16px;
}
@keyframes puzzle-shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-7px); }
  40%, 60% { transform: translateX(7px); }
}

.puzzle-keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.puzzle-key {
  font: 700 22px system-ui, sans-serif; background: var(--teal); color: var(--paper);
  border: none; border-radius: 10px; padding: 18px 0; min-height: 56px;
  cursor: pointer; touch-action: manipulation;
}
.puzzle-key:active { background: var(--teal-bright); }
.puzzle-key--delete { background: var(--plum); }
.puzzle-key--delete:active { background: var(--saffron); color: var(--plum); }

.puzzle-submit {
  font: 800 17px system-ui, sans-serif; background: var(--plum); color: var(--paper);
  border: none; border-radius: 10px; padding: 16px; min-height: 52px;
  cursor: pointer; touch-action: manipulation;
}
.puzzle-submit:active { background: var(--saffron); color: var(--plum); }

/* Dev probe readout for ?dev=puzzle (public/js/main.js) */
.puzzle-probe-readout {
  text-align: center; font: 700 14px system-ui, sans-serif; color: var(--plum);
  padding: 8px 0 0;
}

/* Dev probe layout for ?dev=clock (public/js/main.js) */
.clock-probe { display: flex; gap: 48px; align-items: flex-start; justify-content: center; padding: 32px; height: 100%; box-sizing: border-box; }
.clock-probe-item { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.clock-probe-title { font: 700 14px system-ui, sans-serif; color: var(--ink); }
.clock-probe-readout {
  font: 700 14px system-ui, sans-serif; color: var(--plum); background: var(--paper);
  border: 2px solid var(--saffron); border-radius: 6px; padding: 4px 10px;
}

/* ── Dialogue bar (public/js/dialogue.js) ────────────────────────────────────
   Portrait dialogue bar, mounted once directly on <body> (outside #app) so it
   survives the root.innerHTML wipes between screens/levels; pinned to the
   bottom and hidden (translated off-screen) until a sequence is playing. */
.dialogue-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  display: flex; align-items: center; gap: 14px;
  max-width: 720px; margin: 0 auto; box-sizing: border-box;
  padding: 14px 16px; padding-bottom: max(14px, env(safe-area-inset-bottom));
  background: var(--plum); border-top: 3px solid var(--saffron);
  border-radius: 14px 14px 0 0; box-shadow: 0 -4px 18px rgba(0,0,0,0.25);
  cursor: pointer; touch-action: manipulation; user-select: none;
  transform: translateY(110%); transition: transform 0.18s ease-out;
}
.dialogue-bar--visible { transform: translateY(0); }

.dialogue-portrait {
  position: relative; flex: none; width: 56px; height: 56px; border-radius: 50%;
  overflow: hidden; border: 2px solid var(--saffron);
}
.dialogue-portrait-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.dialogue-portrait-fallback {
  position: absolute; inset: 0; display: grid; place-items: center;
  font: 800 22px system-ui, sans-serif; color: var(--plum);
}

.dialogue-body { flex: 1; min-width: 0; }
.dialogue-name {
  font: 800 12px system-ui, sans-serif; text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: 3px;
}
.dialogue-text { font: 600 16px/1.35 system-ui, sans-serif; color: var(--paper); }

.dialogue-next {
  flex: none; width: 40px; height: 40px; border-radius: 50%; border: none;
  background: var(--saffron); color: var(--plum); font: 800 16px system-ui, sans-serif;
  cursor: pointer; touch-action: manipulation;
}
.dialogue-next:active { background: var(--paper); }

/* A beat already seen once fast-dismisses; the dimmed ▸ hints "tap to skip ahead". */
.dialogue-bar--fast .dialogue-next { opacity: 0.7; }

/* ── Mute toggle (public/js/audio.js + screens.js mountMuteToggle) ───────────
   Fixed corner control, mounted once on <body> like the dialogue bar so it
   survives every #app re-render across screens/levels. */
.mute-toggle {
  position: fixed; top: 14px; right: 14px; z-index: 60;
  width: 40px; height: 40px; padding: 0; border-radius: 50%; border: none;
  background: var(--plum); color: var(--saffron); cursor: pointer;
  display: grid; place-items: center; touch-action: manipulation;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}
.mute-toggle:active { background: var(--saffron); color: var(--plum); }

/* Icon is a small relatively-positioned box wide enough for the cone + wave;
   the cone is a real child element (not a pseudo-element) precisely because
   `clip-path` on an element also clips its own ::before/::after — a nested
   element keeps the wave/strike pseudo-elements, hung off the container,
   unclipped. */
.mute-toggle-icon { position: relative; width: 20px; height: 14px; }
.mute-toggle-icon-cone {
  position: absolute; left: 0; top: 2px; width: 8px; height: 10px; background: currentColor;
  clip-path: polygon(0% 30%, 35% 30%, 100% 0%, 100% 100%, 35% 70%, 0% 70%);
}
.mute-toggle-icon::before {
  /* sound-wave arc, shown when unmuted */
  content: ""; position: absolute; left: 11px; top: 1px; width: 9px; height: 12px;
  border: 2px solid currentColor; border-left: none; border-radius: 0 999px 999px 0;
  opacity: 1; transition: opacity 0.15s;
}
.mute-toggle-icon::after {
  /* strike-through, shown when muted */
  content: ""; position: absolute; left: -2px; top: 6px; width: 23px; height: 2px;
  background: currentColor; transform: rotate(45deg); transform-origin: left center;
  opacity: 0; transition: opacity 0.15s;
}
.mute-toggle--muted .mute-toggle-icon::before { opacity: 0; }
.mute-toggle--muted .mute-toggle-icon::after { opacity: 1; }

/* ── Guided tutorial (public/js/tutorial.js) ─────────────────────────────── */
/* Groups the reroute-decision UI (routes/panel/controls/hint) so it keeps
   the level-side's flex gap even though tutorial.js reveals/hides it as one
   unit at the step-3 coach-mark, unlike the real level where each piece is a
   direct .level-side flex child. */
.tutorial-decision { display: flex; flex-direction: column; gap: 14px; }

/* Coach-mark overlay: a spotlight ring + callout bubble, mounted on <body>
   (like the dialogue bar) so it survives #app re-renders. Every element is
   pointer-events:none — purely visual, so it never blocks dragging the
   ruler/clock or clicking a route underneath it. */
.coach-mark-overlay { position: fixed; inset: 0; z-index: 55; pointer-events: none; }
.coach-mark-ring {
  position: absolute; border-radius: 14px; pointer-events: none;
  box-shadow: 0 0 0 3px var(--saffron), 0 0 22px 4px rgba(252, 216, 103, 0.6);
  animation: coach-mark-pulse 1.6s ease-in-out infinite;
}
@keyframes coach-mark-pulse {
  0%, 100% { box-shadow: 0 0 0 3px var(--saffron), 0 0 16px 2px rgba(252, 216, 103, 0.5); }
  50% { box-shadow: 0 0 0 3px var(--saffron), 0 0 28px 8px rgba(252, 216, 103, 0.75); }
}
.coach-mark-callout {
  position: absolute; box-sizing: border-box; pointer-events: none;
  background: var(--plum); color: var(--paper); border: 2px solid var(--saffron);
  border-radius: 12px; padding: 12px 16px; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.coach-mark-callout-step {
  font: 800 11px system-ui, sans-serif; text-transform: uppercase; letter-spacing: .06em;
  color: var(--saffron); margin-bottom: 4px;
}
.coach-mark-callout-text { font: 600 14px/1.4 system-ui, sans-serif; }