/* EMBERWALL — the visual design of the DOM overlay.
   System fonts only, flat panels, thin luminous borders, near-black grounds and one world accent
   that main.js swaps at runtime by writing --accent / --base on the document root.

   Layout (SPEC 11): #ui is a grid over the whole viewport —
     row 1  topbar (full width) · row 2  map | side panel · row 3  bottom bar (full width)
   The canvas is positioned into the map cell, so no panel ever covers the board. On phones the
   side panel becomes a bottom sheet that slides over the map and is toggled by #sheet-toggle. */

/* -------------------------------------------------------------------------- tokens -- */

:root {
  --base: #1a1a20;                       /* world ground  — set per level */
  --accent: #e8e0d0;                     /* world accent  — set per level */

  /* The page ground is derived from the world, so a bright green board no longer sits in a black
     room. The plain value above each color-mix() is the fallback for engines without it. */
  --bg-0: #0e1014;
  --bg-0: color-mix(in srgb, var(--base) 20%, #07080c);
  --bg-1: #13161b;
  --bg-1: color-mix(in srgb, var(--base) 28%, #07080c);
  --bg-2: #181c21;
  --bg-2: color-mix(in srgb, var(--base) 34%, #07080c);
  --panel: rgba(16, 17, 24, 0.9);
  --panel-soft: rgba(24, 25, 34, 0.7);
  --sunken: rgba(6, 7, 11, 0.6);

  /* Borders follow the world accent instead of the frozen ash the first palette left behind. */
  --line: rgba(232, 226, 214, 0.12);
  --line: color-mix(in srgb, var(--accent) 12%, transparent);
  --line-strong: rgba(232, 226, 214, 0.22);
  --line-strong: color-mix(in srgb, var(--accent) 22%, transparent);
  --line-hot: rgba(255, 154, 69, 0.45);
  --line-hot: color-mix(in srgb, var(--accent) 45%, transparent);
  --glow: rgba(255, 154, 69, 0.22);
  --glow: color-mix(in srgb, var(--accent) 22%, transparent);
  --tint: rgba(255, 154, 69, 0.14);
  --tint: color-mix(in srgb, var(--accent) 14%, transparent);

  --text: #e8e2d6;
  --dim: #a49e92;
  --faint: #6f6b63;
  --gold: #ffcf6a;
  --ember: #fff1c4;
  --good: #9ede7a;
  --warn: #ffc24a;
  --bad: #ff5d6c;

  --topbar-h: 56px;
  --bottombar-h: 84px;
  --side-w: clamp(288px, 24vw, 360px);
  --radius: 12px;
  --radius-sm: 8px;
  --gap: 12px;
  --tap: 44px;

  --ui-fade: 120ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: ui-monospace, Menlo, Consolas, monospace;

  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
}

/* ----------------------------------------------------------------------- structure -- */

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg-0);
  color: var(--text);
  font: 15px/1.45 var(--font);
  overscroll-behavior: none;
  -webkit-text-size-adjust: 100%;
}

body { overflow: hidden; -webkit-tap-highlight-color: transparent; }

html.is-file-protocol #app, html.is-file-protocol .sheet-toggle { display: none; }

#app {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: radial-gradient(120% 120% at 50% 0%, var(--bg-2), var(--bg-0) 70%);
}

/* <canvas> is a REPLACED element: with `width: auto`, absolute left/right/top/bottom do NOT
   stretch it — the used size falls back to the intrinsic 300x150 and the offsets are simply
   over-constrained away. The board therefore has to be given an explicit width/height. */
#game {
  position: absolute;
  left: var(--safe-l);
  top: calc(var(--topbar-h) + var(--safe-t));
  width: calc(100% - var(--side-w) - var(--safe-l) - var(--safe-r));
  height: calc(100% - var(--topbar-h) - var(--bottombar-h) - var(--safe-t) - var(--safe-b));
  display: block;
  touch-action: none;
  background: var(--bg-0);
}

#ui {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr var(--side-w);
  grid-template-rows: var(--topbar-h) 1fr var(--bottombar-h);
  padding: var(--safe-t) var(--safe-r) var(--safe-b) var(--safe-l);
  box-sizing: border-box;
  pointer-events: none;
  z-index: 2;
}

/* Overlay children that float instead of taking a grid cell. */
#ui > .ui-tooltip, #ui > .ui-toasts, #ui > .ui-layer-screens { position: absolute; }

.ui-layer-hud { grid-column: 1 / -1; grid-row: 1 / -1; min-width: 0; }

.ui-hud {
  position: relative;
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr var(--bottombar-h);
  height: 100%;
  min-height: 0;
}

.ui-topbar, .ui-bottombar, .ui-side { pointer-events: auto; }

/* Every panel fades when the overlay leaves the game screen (SPEC 12: 120 ms). */
.ui-hud, .ui-side { transition: opacity var(--ui-fade) var(--ease); }
#ui:not(.is-ingame) .ui-hud, #ui:not(.is-ingame) .ui-side { opacity: 0; pointer-events: none; }

/* ------------------------------------------------------------------- shared chrome -- */

#ui :where(button) {
  font: inherit;
  color: inherit;
  margin: 0;
  padding: 8px 14px;
  min-height: var(--tap);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-soft);
  cursor: pointer;
  touch-action: manipulation;
  transition: background var(--ui-fade) var(--ease), border-color var(--ui-fade) var(--ease),
    color var(--ui-fade) var(--ease), opacity var(--ui-fade) var(--ease);
}

#ui :where(button:hover:not(:disabled)) { border-color: var(--line-hot); background: rgba(36, 34, 46, 0.8); }
#ui :where(button:active:not(:disabled)) { transform: translateY(1px); }
#ui :where(button:disabled) { opacity: 0.42; cursor: default; }
#ui :where(h1, h2, h3, h4, p, ul, ol) { margin: 0 0 10px; }
#ui :where(h1) { font-size: 26px; letter-spacing: 0.08em; font-weight: 600; }
#ui :where(h2) { font-size: 20px; letter-spacing: 0.06em; font-weight: 600; }
#ui :where(h3) { font-size: 15px; letter-spacing: 0.04em; font-weight: 600; }
#ui :where(h4) { font-size: 12px; font-weight: 600; }
#ui :where(ul, ol) { padding-left: 20px; }
#ui :where(a) { color: var(--accent); }

#ui :where(input, select, textarea) {
  font: inherit;
  color: inherit;
  padding: 6px 10px;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--sunken);
}

#ui :where(input[type='range']) {
  accent-color: var(--accent);
  width: 100%;
  min-height: var(--tap);
  padding: 0;
  border: 0;
  background: none;
}

#ui :where(input[type='checkbox']) { accent-color: var(--accent); width: 20px; height: 20px; min-height: 20px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.is-red { color: var(--bad) !important; }
.is-hidden, .hidden { display: none !important; }

/* -------------------------------------------------------------------------- topbar -- */

.ui-topbar {
  grid-row: 1;
  display: flex;
  align-items: center;
  gap: var(--gap);
  padding: 0 14px;
  box-sizing: border-box;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 11, 16, 0.96), rgba(10, 11, 16, 0.74));
  backdrop-filter: blur(6px);
}

.ui-stat, .ui-wave {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--sunken);
}

.ui-stat-icon { font-size: 13px; line-height: 1; align-self: center; }
.ui-stat-value, .ui-wave-value { font-family: var(--mono); font-size: 18px; font-variant-numeric: tabular-nums; }
.ui-stat-sub, .ui-wave-label, .ui-preview-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}
.ui-stat-gold .ui-stat-icon, .ui-stat-gold .ui-stat-value { color: var(--gold); }
.ui-stat-embers .ui-stat-icon, .ui-stat-embers .ui-stat-value { color: var(--ember); }
.ui-stat-embers.is-low { border-color: rgba(255, 194, 74, 0.5); }
.ui-stat-embers.is-critical { border-color: rgba(255, 93, 108, 0.65); animation: pulse-bad 1.1s ease-in-out infinite; }
.ui-stat-embers.is-critical .ui-stat-value { color: var(--bad); }

.ui-twist { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.ui-twist-icon { font-size: 15px; }
.ui-twist-name { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; }
.ui-twist-status { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.ui-twist.is-none { opacity: 0.55; }
.ui-menu-btn { min-width: var(--tap); }

/* ---------------------------------------------------------------------- bottom bar -- */

.ui-bottombar {
  grid-row: 3;
  display: flex;
  align-items: center;
  gap: var(--gap);
  padding: 0 14px;
  box-sizing: border-box;
  border-top: 1px solid var(--line);
  background: linear-gradient(0deg, rgba(10, 11, 16, 0.96), rgba(10, 11, 16, 0.72));
  backdrop-filter: blur(6px);
}

.ui-start {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  min-width: 168px;
  padding: 8px 18px;
  border-color: var(--line-strong);
}

.ui-start-label { font-size: 15px; font-weight: 600; letter-spacing: 0.04em; }
.ui-start-sub { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.ui-start.is-ready { border-color: var(--line-hot); background: var(--tint); box-shadow: 0 0 22px var(--glow); }
.ui-start.is-ready .ui-start-label { color: var(--accent); }
.ui-pause { min-width: var(--tap); font-size: 16px; }

.ui-speeds {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--sunken);
}

.ui-speed {
  min-width: 46px;
  min-height: 36px;
  padding: 4px 10px;
  border-color: transparent;
  background: none;
  font-family: var(--mono);
  font-size: 13px;
}

.ui-speed.is-active, .ui-pause.is-active, .ui-speed-option.is-active, .ui-diff.is-active, .ui-toggle.is-on {
  border-color: var(--line-hot);
  background: var(--tint);
  color: var(--accent);
}

.ui-preview { display: flex; align-items: center; gap: 10px; margin-left: auto; min-width: 0; overflow: hidden; }
.ui-preview-list { display: flex; align-items: center; gap: 6px; padding: 2px; overflow-x: auto; scrollbar-width: none; }
.ui-preview-list::-webkit-scrollbar { display: none; }

.ui-preview-item {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--sunken);
  white-space: nowrap;
  cursor: pointer;
}

.ui-preview-item.is-air { border-color: rgba(122, 228, 255, 0.4); }
.ui-preview-icon { display: block; }
.ui-preview-count { font-family: var(--mono); font-size: 12px; color: var(--dim); }
.ui-preview-more, .ui-preview-empty { font-size: 12px; color: var(--faint); }

/* ---------------------------------------------------------------------- side panel -- */

.ui-side {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-left: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(12, 13, 19, 0.92), rgba(10, 11, 16, 0.96));
  backdrop-filter: blur(6px);
}

.ui-shop, .ui-shop-list, .ui-upgrade { display: flex; flex-direction: column; flex: 1 1 auto; min-height: 0; }

.ui-shop-head, .ui-up-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px 8px;
  border-bottom: 1px solid var(--line);
}

.ui-shop-head { flex-wrap: wrap; }
.ui-shop-title { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); }
.ui-shop-hint { flex: 1 1 100%; font-size: 12px; color: var(--faint); }

.ui-cards, .ui-up-cols {
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 10px;
  min-height: 0;
  flex: 1 1 auto;
}

.ui-cards { display: flex; flex-direction: column; gap: 8px; }

/* tower cards — each card carries its damage-type colour as --accent */

/* `flex-shrink` defaults to 1, and .ui-cards is a column flex box with a definite height: ten
   cards whose content is taller than the list were squeezed to a fraction of their content
   height, so every blurb and damage-type label spilled onto the card below. Cards never shrink;
   the list scrolls instead. `height: auto` keeps the button from adopting a fixed line box. */
.ui-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 10px;
  flex: 0 0 auto;
  height: auto;
  min-height: calc(44px + 20px);
  padding: 10px;
  border-radius: var(--radius);
  background: var(--panel);
  text-align: left;
  overflow: hidden;
}

/* Same replaced-element rule as #game: without an explicit box these canvases render at their
   intrinsic 300x150 and blow the card layout apart. */
.ui-card-icon {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: var(--radius-sm);
  background: var(--sunken);
}
.ui-card-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.ui-card-head { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.ui-card-name { font-size: 14px; font-weight: 600; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ui-card-price { flex: 0 0 auto; font-family: var(--mono); font-size: 14px; color: var(--gold); margin-left: auto; }

/* Two lines, then an ellipsis: the blurbs are one sentence, so this reads in full at every
   panel width and no card can grow tall enough to push the rest of the list off screen. */
.ui-card-blurb {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
  font-size: 12px;
  line-height: 1.35;
  color: var(--dim);
  overflow-wrap: anywhere;
}

.ui-card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 11px; color: var(--faint); }
.ui-card-type { letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.ui-card-note, .ui-card-limit { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.ui-card-note { display: none; }
.ui-card.is-open .ui-card-note { display: block; }
.ui-card-info { align-self: center; min-width: 34px; min-height: 34px; padding: 4px 10px; border-radius: 999px; font-family: var(--mono); }
.ui-card.is-armed { border-color: var(--line-hot); background: var(--tint); box-shadow: 0 0 20px var(--glow); }
.ui-card.is-poor { opacity: 0.55; }
.ui-card.is-maxed { opacity: 0.45; }

/* upgrade panel — two columns, four tiers each (SPEC 11) */

.ui-up-title { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.ui-up-name { font-size: 15px; font-weight: 600; margin: 0; }
.ui-up-type, .ui-up-tierbadge {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--dim);
}
.ui-up-close { margin-left: auto; min-width: 36px; min-height: 36px; padding: 4px 10px; }
.ui-up-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.ui-up-col { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.ui-up-col-head { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin: 0; }
.ui-up-tiers { display: flex; flex-direction: column; gap: 6px; }

.ui-tier {
  display: flex;
  flex-direction: column;
  flex: 0 0 auto;
  height: auto;
  gap: 3px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--panel);
  text-align: left;
}

.ui-tier-head { display: flex; align-items: center; gap: 6px; }
.ui-tier-name { font-size: 13px; font-weight: 600; min-width: 0; }
.ui-tier-mark { margin-left: auto; font-size: 12px; color: var(--faint); }
.ui-tier-lock { color: var(--warn); }
.ui-tier-desc { font-size: 11px; line-height: 1.35; color: var(--dim); }
.ui-tier-cost { font-family: var(--mono); font-size: 12px; color: var(--gold); }
.ui-tier-note { font-size: 11px; color: var(--faint); }
.ui-tier.is-bought { border-color: rgba(158, 222, 122, 0.45); background: rgba(158, 222, 122, 0.08); }
.ui-tier.is-bought .ui-tier-mark { color: var(--good); }
.ui-tier.is-buyable { border-color: var(--line-hot); box-shadow: 0 0 16px var(--glow); }
.ui-tier.is-costly { opacity: 0.6; }
.ui-tier.is-costly .ui-tier-cost { color: var(--bad); }
.ui-tier.is-future { opacity: 0.5; cursor: not-allowed; }
.ui-tier.is-future .ui-tier-cost { color: var(--bad); }
.ui-tier.is-future .ui-tier-name { color: var(--dim); }
.ui-tier.is-locked { opacity: 0.5; border-style: dashed; cursor: not-allowed; }

.ui-up-stats { display: flex; flex-direction: column; gap: 4px; padding: 10px 12px; border-top: 1px solid var(--line); background: var(--sunken); }
.ui-up-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(78px, 1fr)); gap: 6px; padding: 8px 12px; background: var(--sunken); }
.ui-up-metric { display: flex; flex-direction: column; gap: 2px; }
.ui-up-metric-label { font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); }
.ui-up-metric-value { font-family: var(--mono); font-size: 13px; }
.ui-up-status { display: none; padding: 0 12px; font-size: 12px; color: var(--warn); }
.ui-up-status.is-on { display: block; }
.ui-up-chips { display: flex; flex-wrap: wrap; gap: 5px; padding: 0 12px 8px; }

.ui-stat-row { display: flex; align-items: baseline; gap: 8px; font-size: 12px; }
.ui-stat-name { flex: 1 1 auto; color: var(--faint); }
.ui-stat-num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.ui-stat-delta { font-family: var(--mono); font-size: 11px; color: var(--good); opacity: 0; transition: opacity var(--ui-fade) var(--ease); }
.ui-stat-row.has-delta .ui-stat-delta { opacity: 1; }

.ui-prio { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-top: 1px solid var(--line); }
.ui-prio-label { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); }
.ui-prio-value { flex: 1 1 auto; font-family: var(--mono); font-size: 13px; color: var(--accent); }
.ui-prio-step { min-width: 40px; min-height: 40px; padding: 4px 10px; }
.ui-prio-help { padding: 0 12px 8px; font-size: 11px; color: var(--faint); }
.ui-sell { margin: 8px 12px calc(12px + var(--safe-b)); border-color: rgba(255, 93, 108, 0.35); color: #ffb3ba; }
.ui-sell:hover:not(:disabled) { border-color: var(--bad); background: rgba(255, 93, 108, 0.12); }

/* ---------------------------------------------------------- chips, tags, tooltips -- */

.ui-chips { display: inline-flex; flex-wrap: wrap; gap: 4px; }

.ui-chip, .ui-tag, .badge, .pill {
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
  white-space: nowrap;
}

.ui-chip-immune { color: var(--chip-color, var(--text)); border-color: var(--chip-color, var(--line-strong)); }
.ui-chip-none { opacity: 0.6; }
.ui-chip-target { color: var(--accent); border-color: var(--line-hot); }
.ui-tag-camo { color: #b9a8ff; border-color: rgba(176, 122, 255, 0.45); }
.ui-tag-boss { color: var(--bad); border-color: rgba(255, 93, 108, 0.5); }

.ui-tooltip {
  min-width: 180px;
  max-width: 280px;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(10, 11, 16, 0.95);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.55);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--ui-fade) var(--ease), visibility var(--ui-fade) var(--ease);
  z-index: 6;
}

.ui-tooltip.is-visible { opacity: 1; visibility: visible; }
.ui-enemy-tip { left: 0; top: 0; will-change: transform; }
.ui-twist-tip { position: absolute; top: calc(var(--topbar-h) + 6px); right: 14px; }
.ui-tip-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.ui-tip-name { font-size: 14px; font-weight: 600; }
.ui-tip-tags { display: inline-flex; gap: 4px; margin-left: auto; }
.ui-tip-body { font-size: 12px; color: var(--dim); }
.ui-tip-hp { margin: 4px 0 6px; font-family: var(--mono); font-size: 11px; color: var(--dim); }
.ui-tip-row { display: flex; align-items: baseline; gap: 8px; margin-top: 4px; }
.ui-tip-row.is-empty { display: none; }
.ui-tip-label { flex: 0 0 56px; font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); }
.ui-hpbar { height: 4px; border-radius: 999px; background: rgba(255, 255, 255, 0.1); overflow: hidden; }
.ui-hpbar-fill { height: 100%; width: 100%; background: linear-gradient(90deg, var(--bad), var(--warn)); transition: width var(--ui-fade) linear; }

/* -------------------------------------------------------------- toasts & banners -- */

.ui-toasts {
  left: 50%;
  top: calc(var(--topbar-h) + var(--safe-t) + 14px);
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: min(92vw, 460px);
  pointer-events: none;
  z-index: 7;
}

.ui-toast {
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(10, 11, 16, 0.92);
  font-size: 13px;
  text-align: center;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity var(--ui-fade) var(--ease), transform var(--ui-fade) var(--ease);
}

.ui-toast.is-visible { opacity: 1; transform: translateY(0); }
.ui-toast-good { border-color: rgba(158, 222, 122, 0.55); color: var(--good); }
.ui-toast-bad { border-color: rgba(255, 93, 108, 0.6); color: #ffb3ba; }
.ui-toast-warn { border-color: rgba(255, 194, 74, 0.55); color: var(--warn); }
.ui-toast-wave { border-color: var(--line-hot); color: var(--accent); }

.ui-banner {
  position: absolute;
  top: calc(var(--topbar-h) + 8px);
  left: 14px;
  padding: 5px 12px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--ui-fade) var(--ease), visibility var(--ui-fade) var(--ease);
}

.ui-banner.is-visible { opacity: 1; visibility: visible; }
.ui-banner-dev { border: 1px dashed rgba(255, 194, 74, 0.6); background: rgba(60, 42, 6, 0.7); color: var(--warn); }

/* ------------------------------------------------------------------------ screens -- */

.ui-layer-screens { inset: 0; pointer-events: none; z-index: 8; }
.ui-screens { position: absolute; inset: 0; }

.ui-screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  box-sizing: border-box;
  pointer-events: auto;
  background: radial-gradient(120% 120% at 50% 0%, rgba(20, 16, 25, 0.86), rgba(6, 7, 11, 0.94));
  backdrop-filter: blur(3px);
}

.ui-screen[hidden] { display: none; }

.ui-panel {
  width: min(680px, 100%);
  max-height: 100%;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 22px 24px calc(22px + var(--safe-b));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
  box-sizing: border-box;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.6);
}

.ui-title { font-size: clamp(28px, 6vw, 44px); letter-spacing: 0.22em; color: var(--accent); margin-bottom: 4px; }
.ui-tagline, .ui-screen-flavour { color: var(--dim); }
.ui-screen-head { margin-bottom: 16px; }
.ui-screen-title { color: var(--accent); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 4px; }
.ui-screen-sub { color: var(--dim); margin: 0; }

.ui-btn { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; min-height: var(--tap); padding: 10px 18px; }
.ui-btn-label { font-weight: 600; letter-spacing: 0.03em; }
.ui-btn-sub { font-size: 11px; color: var(--faint); }
.ui-btn-primary { border-color: var(--line-hot); background: var(--tint); color: var(--accent); }
.ui-btn-danger { border-color: rgba(255, 93, 108, 0.4); color: #ffb3ba; }
.ui-btn-danger:hover:not(:disabled) { border-color: var(--bad); background: rgba(255, 93, 108, 0.12); }

.ui-menu-list { display: flex; flex-direction: column; gap: 8px; }
.ui-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.ui-difficulty { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }

.ui-worlds { display: flex; flex-direction: column; gap: 12px; max-height: 52vh; overflow-y: auto; overscroll-behavior: contain; padding-right: 4px; }
.ui-world { padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--sunken); }
.ui-world.is-locked { opacity: 0.55; }
.ui-world-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 4px; }
.ui-world-name { color: var(--world-accent, var(--text)); margin: 0; }
.ui-world-twist { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin-left: auto; }
.ui-world-desc, .ui-twist-desc { font-size: 12px; color: var(--dim); margin-bottom: 6px; }
.ui-twist-desc { color: var(--faint); }
.ui-lock { font-size: 12px; color: var(--warn); margin-bottom: 6px; }
.ui-levels { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.ui-levels-empty { font-size: 12px; color: var(--faint); }
.ui-level { align-items: flex-start; padding: 10px 12px; }
.ui-level-name { font-weight: 600; }
.ui-level.is-cleared { border-color: rgba(158, 222, 122, 0.35); }
.ui-stars { letter-spacing: 0.2em; font-size: 13px; color: var(--faint); }
.ui-star.is-earned { color: var(--gold); }

.ui-settings { display: flex; flex-direction: column; gap: 6px; }
.ui-setting { display: flex; flex-direction: column; gap: 6px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.ui-setting-head { display: flex; align-items: baseline; gap: 10px; }
.ui-setting-label { font-weight: 600; }
.ui-setting-value { margin-left: auto; font-family: var(--mono); color: var(--accent); }
.ui-setting-help { font-size: 12px; color: var(--faint); }
.ui-slider { width: 100%; }
.ui-toggle { flex-direction: row; align-items: center; justify-content: space-between; width: 100%; }
.ui-toggle-state { font-family: var(--mono); font-size: 12px; color: var(--dim); }
.ui-speed-group { display: flex; gap: 6px; }
.ui-speed-option { min-width: 56px; font-family: var(--mono); align-items: center; }
.ui-setting-danger { border-bottom: 0; }
.ui-danger-question { color: var(--warn); font-size: 13px; }

.ui-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 10px; margin: 14px 0; }
.ui-summary-item { display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--sunken); }
.ui-summary-value { font-family: var(--mono); font-size: 20px; color: var(--accent); }
.ui-summary-label { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); }
.ui-criteria { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.ui-criterion { display: flex; align-items: baseline; gap: 8px; font-size: 13px; color: var(--faint); }
.ui-criterion.is-earned { color: var(--text); }
.ui-criterion-mark { color: var(--gold); }

/* Onboarding hints sit over the map, anchored on what they talk about (SPEC 11). */
.ui-hints {
  position: absolute;
  left: var(--safe-l);
  right: calc(var(--side-w) + var(--safe-r));
  top: calc(var(--topbar-h) + var(--safe-t));
  bottom: calc(var(--bottombar-h) + var(--safe-b));
  pointer-events: none;
}

.ui-hint {
  position: absolute;
  transform: translate(-50%, -120%);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  max-width: min(320px, 76vw);
  padding: 9px 12px;
  border: 1px solid var(--line-hot);
  border-left-width: 3px;
  border-radius: var(--radius-sm);
  background: rgba(10, 11, 16, 0.94);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.5);
  font-size: 13px;
  pointer-events: auto;
  cursor: pointer;
}

.ui-hint-text { flex: 1 1 auto; }
.ui-hint-dismiss { min-width: 26px; min-height: 26px; padding: 0 6px; border: 0; background: none; color: var(--faint); }

/* ---------------------------------------------------------------------- utilities -- */

.row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.col { display: flex; flex-direction: column; gap: 10px; }
.grid { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.center { text-align: center; justify-content: center; }
.grow { flex: 1 1 auto; }
.muted { color: var(--dim); }
.dim { color: var(--faint); }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.sep { height: 1px; margin: 14px 0; border: 0; background: var(--line); }
.scroll { overflow-y: auto; overscroll-behavior: contain; }
.fade { transition: opacity var(--ui-fade) var(--ease), transform var(--ui-fade) var(--ease); }
.fade-out { opacity: 0; }
.fade-in { opacity: 1; }

/* --------------------------------------------------------------- map editor ------ */
/* render/mapEditor.js + mapLibrary.js + mapCanvas.js. The screen is shown and hidden with an
   inline `display` (mapEditorShared.show), so every rule here describes the VISIBLE state —
   a hidden node carries `display: none` inline and wins regardless.
   The editor may be mounted outside #ui, so its controls are styled from scratch instead of
   inheriting the shared button/input chrome. */

.me-root {
  position: absolute;
  inset: 0;
  z-index: 9;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: var(--safe-t) var(--safe-r) var(--safe-b) var(--safe-l);
  box-sizing: border-box;
  background: radial-gradient(120% 120% at 50% 0%, var(--bg-2), var(--bg-0) 70%);
  color: var(--text);
  font: 15px/1.45 var(--font);
  pointer-events: auto;
}

.me-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 11, 16, 0.96), rgba(10, 11, 16, 0.74));
}

.me-title { flex: 1 1 auto; margin: 0; font-size: 18px; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent); }
.me-dirty { padding: 3px 10px; border: 1px dashed rgba(255, 194, 74, 0.6); border-radius: 999px;
  font-size: 11px; letter-spacing: 0.08em; color: var(--warn); }
.me-status { font-family: var(--mono); font-size: 12px; color: var(--good); }

/* --- controls --- */

.me-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: var(--tap);
  min-width: var(--tap);
  margin: 0;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-soft);
  color: inherit;
  font: inherit;
  font-size: 13px;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
  transition: background var(--ui-fade) var(--ease), border-color var(--ui-fade) var(--ease),
    color var(--ui-fade) var(--ease), opacity var(--ui-fade) var(--ease);
}

.me-btn:hover:not(:disabled) { border-color: var(--line-hot); background: rgba(36, 34, 46, 0.8); }
.me-btn:active:not(:disabled) { transform: translateY(1px); }
.me-btn:disabled { opacity: 0.42; cursor: default; }
.me-btn-primary { border-color: var(--line-hot); background: var(--tint); color: var(--accent); }
.me-btn-ghost { background: none; }
.me-btn-danger, .me-btn.is-danger { border-color: rgba(255, 93, 108, 0.4); color: #ffb3ba; }
.me-btn-danger:hover:not(:disabled), .me-btn.is-danger:hover:not(:disabled) {
  border-color: var(--bad); background: rgba(255, 93, 108, 0.12); }
.me-btn.is-active { border-color: var(--line-hot); background: var(--tint); color: var(--accent); }

.me-field { display: flex; align-items: center; gap: 8px; min-width: 0; }
.me-field-label { flex: 0 0 auto; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--faint); }

.me-input, .me-select, .me-textarea {
  flex: 1 1 auto;
  min-width: 0;
  min-height: var(--tap);
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--sunken);
  color: inherit;
  font: inherit;
  font-size: 14px;
}

.me-input:focus, .me-select:focus, .me-textarea:focus { border-color: var(--line-hot); outline: none; }
.me-input-num { flex: 0 0 88px; font-family: var(--mono); }
.me-textarea { display: block; width: 100%; box-sizing: border-box; resize: vertical;
  font-family: var(--mono); font-size: 13px; }
.me-range { flex: 1 1 auto; min-height: var(--tap); padding: 0; border: 0; background: none;
  accent-color: var(--accent); }
.me-brush-value { flex: 0 0 auto; min-width: 22px; font-family: var(--mono); text-align: center; }

.me-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.me-sub { margin: 0; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dim); }
.me-hint { margin: 0; font-size: 12px; line-height: 1.4; color: var(--faint); }
.me-inline-error { margin: 0; font-size: 12px; color: var(--bad); }
.me-empty { margin: 0; padding: 24px 4px; font-size: 13px; color: var(--faint); }

/* --- library --- */

.me-library {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1 1 auto;
  min-height: 0;
  padding: 14px;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.me-lib-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.me-lib-count { margin-left: auto; font-family: var(--mono); font-size: 12px; color: var(--faint); }

.me-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--sunken);
}

.me-panel-text { margin: 0; font-size: 13px; color: var(--dim); }

.me-lib-list { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.me-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

/* A canvas is a replaced element: without an explicit box it falls back to 300x150 and tears
   the card grid apart. These are the exact pixel dimensions mapEditorShared.thumbnail draws. */
.me-thumb {
  display: block;
  width: 132px;
  height: 88px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-1);
}

.me-card-meta { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.me-card-name { margin: 0; font-size: 15px; font-weight: 600; overflow-wrap: anywhere; }
.me-card-line { margin: 0; font-size: 12px; color: var(--dim); }
.me-card-warn { color: var(--warn); }
.me-card-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; }
.me-card-actions .me-btn { flex: 1 1 auto; }

.me-badge {
  align-self: flex-start;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}

.me-badge.is-valid, .me-vstate.is-valid { border-color: rgba(158, 222, 122, 0.5); color: var(--good); }
.me-badge.is-invalid, .me-vstate.is-invalid { border-color: rgba(255, 93, 108, 0.55); color: #ffb3ba; }

/* --- editor --- */

.me-editor { display: flex; flex: 1 1 auto; min-height: 0; min-width: 0; }

/* The painting surface. mapCanvas appends its own <canvas class="me-canvas"> here and stretches
   it inline, so this box is what actually decides the drawing resolution. */
.me-canvas-host {
  flex: 1;
  min-height: 320px;
  min-width: 0;
  position: relative;
  overflow: hidden;
  background: var(--bg-1);
  touch-action: none;
}

.me-side {
  display: flex;
  flex-direction: column;
  /* Deliberately not --side-w: the in-game side panel collapses to 0 on phones, and the editor
     needs its own width there. */
  flex: 0 0 clamp(268px, 30vw, 350px);
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  border-left: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(12, 13, 19, 0.92), rgba(10, 11, 16, 0.96));
}

.me-tools, .me-settings, .me-validation {
  display: flex;
  flex-direction: column;
  flex: 0 0 auto;
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid var(--line);
}

.me-section-head { display: flex; align-items: center; gap: 8px; }
.me-tools.is-collapsed { padding-bottom: 8px; }
.me-tool-body { display: flex; flex-direction: column; gap: 8px; }
.me-tool-body .me-row .me-btn { flex: 1 1 auto; }

.me-tile-list { display: grid; gap: 6px; }

.me-tile-btn {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 10px;
  height: auto;
  padding: 8px 10px;
  text-align: left;
}

.me-swatch {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
}

.me-tile-copy { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.me-tile-name { font-size: 13px; font-weight: 600; }
.me-tile-desc {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
  font-size: 11px;
  line-height: 1.35;
  font-weight: 400;
  color: var(--faint);
}

.me-vstate { padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--sunken); font-size: 13px; }
.me-vlist { margin: 0; padding-left: 18px; display: flex; flex-direction: column; gap: 4px;
  font-size: 12px; line-height: 1.4; }
.me-vlist:empty { display: none; }
.me-vitem-error { color: #ffb3ba; }
.me-vitem-warning { color: var(--warn); }
.me-vstats { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 10px; margin: 0; font-size: 12px; }
.me-vstat-label { color: var(--faint); }
.me-vstat-value { margin: 0; font-family: var(--mono); text-align: right; color: var(--text); }

.me-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding: 12px calc(12px + var(--safe-r)) calc(12px + var(--safe-b)) 12px;
}

.me-footer .me-btn { flex: 1 1 auto; }

/* --- shared modal --- */

.me-modal {
  position: fixed;
  inset: 0;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  box-sizing: border-box;
  background: rgba(6, 7, 11, 0.72);
  backdrop-filter: blur(3px);
}

.me-modal-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: min(460px, 100%);
  max-height: 100%;
  overflow-y: auto;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.6);
  box-sizing: border-box;
}

.me-modal-title { margin: 0; font-size: 16px; font-weight: 600; letter-spacing: 0.04em; color: var(--accent); }
.me-modal-body { display: flex; flex-direction: column; gap: 10px; }
.me-modal-text { margin: 0; font-size: 13px; color: var(--dim); }
.me-modal-card .me-row .me-btn { flex: 1 1 auto; }

/* Phones and short windows: the side panel drops below the board and the whole screen scrolls. */
@media (max-width: 860px), (max-height: 560px) {
  .me-editor { flex-direction: column; overflow-y: auto; overscroll-behavior: contain; }
  .me-canvas-host { flex: 0 0 auto; height: min(52vh, 420px); min-height: 240px;
    border-bottom: 1px solid var(--line); }
  .me-side { flex: 1 0 auto; overflow: visible; border-left: 0; }
  .me-lib-list { grid-template-columns: 1fr; }
  .me-card { grid-template-columns: 1fr; justify-items: start; }
  .me-thumb { width: 100%; height: 120px; object-fit: contain; }
  .me-bar { padding: 8px 10px; }
  .me-title { font-size: 15px; }
}

/* ------------------------------------------------------ phones: shop as a sheet --- */

.sheet-toggle {
  display: none;
  position: absolute;
  z-index: 5;
  right: calc(12px + var(--safe-r));
  bottom: calc(var(--bottombar-h) + var(--safe-b) + 10px);
  align-items: center;
  gap: 8px;
  min-height: var(--tap);
  padding: 8px 16px;
  border: 1px solid var(--line-hot);
  border-radius: 999px;
  background: rgba(10, 11, 16, 0.92);
  color: var(--accent);
  font: 13px/1 var(--font);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  touch-action: manipulation;
}

.sheet-toggle-caret { transition: transform var(--ui-fade) var(--ease); }
body.sheet-open .sheet-toggle-caret { transform: rotate(180deg); }

@media (max-width: 860px), (orientation: portrait) and (max-width: 1024px) {
  :root { --topbar-h: 52px; --bottombar-h: 76px; --side-w: 0px; --gap: 8px; }

  .sheet-toggle { display: inline-flex; }
  .ui-topbar, .ui-bottombar { padding: 0 10px; gap: 8px; }
  .ui-stat, .ui-wave { padding: 4px 9px; }
  .ui-stat-value, .ui-wave-value { font-size: 16px; }
  .ui-twist-name, .ui-preview { display: none; }
  .ui-start { min-width: 124px; padding: 6px 12px; }

  /* The side panel slides up over the map and is dismissed the same way. */
  .ui-side {
    grid-column: 1 / -1;
    grid-row: 1 / -1;
    align-self: end;
    z-index: 4;
    margin-bottom: var(--bottombar-h);
    max-height: min(56vh, 460px);
    border-left: 0;
    border-top: 1px solid var(--line-hot);
    border-radius: var(--radius) var(--radius) 0 0;
    box-shadow: 0 -18px 46px rgba(0, 0, 0, 0.6);
    transform: translateY(105%);
    transition: transform 180ms var(--ease);
  }

  body.sheet-open .ui-side { transform: translateY(0); }
  body:not(.sheet-open) .ui-side { pointer-events: none; }

  .ui-side::before {
    content: '';
    flex: 0 0 auto;
    width: 42px;
    height: 4px;
    margin: 8px auto 2px;
    border-radius: 999px;
    background: var(--line-strong);
  }

  .ui-tooltip { max-width: min(84vw, 300px); }
  .ui-screen { padding: 12px; }
  .ui-worlds { max-height: 46vh; }
}

@media (max-width: 420px) {
  .ui-up-cols { grid-template-columns: 1fr; }
  .ui-start-sub { display: none; }
  .ui-menu-btn { padding: 8px 10px; }
  .ui-levels { grid-template-columns: 1fr 1fr; }
}

/* --------------------------------------------------------------------- motion ----- */

@keyframes pulse-bad {
  0%, 100% { box-shadow: 0 0 0 rgba(255, 93, 108, 0); }
  50% { box-shadow: 0 0 18px rgba(255, 93, 108, 0.45); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}

/* -------------------------------------------------------------------- noscript ---- */

.noscript-panel {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px;
  text-align: center;
  background: var(--bg-0);
  color: var(--text);
}

.noscript-panel h1 { color: var(--gold); letter-spacing: 0.1em; }