/* DEVIL'S HIGHWAY — UI shell. Charcoal + amber (#ffb24d), condensed uppercase
   system stack, hairline rules (art-direction bible). No webfonts, no gradients
   beyond restrained legibility scrims. */

:root {
  --ink: #0a0c10;
  --amber: #ffb24d;
  --bone: #ece7dd;
  --dim: rgba(236, 231, 221, 0.55);
  --hairline: rgba(255, 178, 77, 0.26);
  --hairline-soft: rgba(236, 231, 221, 0.14);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--ink);
  color: var(--bone);
  font-family: "Arial Narrow", "Helvetica Neue Condensed", "Liberation Sans Narrow",
    "Roboto Condensed", "Segoe UI", system-ui, sans-serif;
  font-stretch: semi-condensed;
  overflow: hidden;
  overscroll-behavior: none;
  /* Gameplay swipes start over the DOM overlays, not just #gl — no page
     pan/zoom may steal them (html/body already cut scrolling). */
  touch-action: none;
}

#gl {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

/* ---- screens ---------------------------------------------------------- */
.screen {
  position: fixed;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}
.screen.on { opacity: 1; pointer-events: auto; }

/* ---- loading ---------------------------------------------------------- */
#loading { display: grid; place-items: center; background: var(--ink); z-index: 30; }
.load-inner { display: grid; justify-items: center; gap: 18px; }
.wordmark {
  /* Sized for the long mark: 15 tracked caps must hold a 320 px viewport. */
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.3em;
  margin-right: -0.3em; /* optically recenter tracked caps */
  color: var(--bone);
}
.load-bar {
  width: 240px;
  height: 2px;
  background: rgba(236, 231, 221, 0.12);
  overflow: hidden;
}
#load-fill {
  display: block;
  width: 0%;
  height: 100%;
  background: var(--amber);
  transition: width 0.25s ease;
}
.load-sub {
  font-size: 11px;
  letter-spacing: 0.6em;
  margin-right: -0.6em;
  color: var(--dim);
}

/* ---- menu ------------------------------------------------------------- */
#menu {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 7vh 6vw 4.5vh;
}
.menu-scrim {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(90deg, rgba(7, 9, 12, 0.66) 0%, rgba(7, 9, 12, 0.28) 38%, rgba(7, 9, 12, 0) 62%),
    linear-gradient(0deg, rgba(7, 9, 12, 0.72) 0%, rgba(7, 9, 12, 0.25) 26%, rgba(7, 9, 12, 0) 46%);
}
.menu-head, .cards, .menu-foot { position: relative; z-index: 1; }
.title {
  /* "DEVIL'S HIGHWAY" is ~2.1x the old mark's width — scale down so the
     single line never wraps or clips (6vw band + capped max). */
  font-size: clamp(34px, 7.6vw, 108px);
  line-height: 0.94;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--bone);
}
.subtitle {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 2.2vh;
  font-size: clamp(12px, 1.3vw, 16px);
  letter-spacing: 0.44em;
  color: var(--amber);
}
.subtitle .rule { flex: 0 0 48px; height: 1px; background: var(--hairline); }

.cards {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-self: center;
}
.card {
  min-width: 196px;
  padding: 16px 20px 14px;
  /* Night legibility: solid charcoal fill + amber-tinted hairlines instead of
     backdrop-filter (SwiftShader cost) — cards must hold over black road. */
  border: 1px solid rgba(255, 178, 77, 0.38);
  border-left: 2px solid rgba(255, 178, 77, 0.5);
  background: rgba(12, 14, 18, 0.78);
  text-align: left;
  display: grid;
  gap: 6px;
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}
.card:hover { border-color: var(--hairline); transform: translateY(-2px); }
.card.sel {
  border-color: rgba(255, 178, 77, 0.95);
  background: rgba(27, 20, 11, 0.86);
}
.card-key {
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--dim);
}
.card.sel .card-key { color: var(--amber); }
.card-name {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: rgba(236, 231, 221, 0.82);
  transition: color 0.18s ease;
}
.card.sel .card-name { color: var(--amber); }
.card-desc {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--dim);
}
/* Per-mode best line (task 2.5), footer slot under .card-desc: amber
   hairline rule, footer-matching tracked caps; dim until the card is
   selected, then amber — the .card-key pattern. */
.card-best {
  margin-top: 2px;
  padding-top: 8px;
  border-top: 1px solid var(--hairline);
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--dim);
  transition: color 0.18s ease;
}
.card.sel .card-best { color: var(--amber); }

.menu-foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 14px;
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--dim);
}
.menu-foot .hint { letter-spacing: 0.22em; }

/* staged reveal */
#menu .title, #menu .subtitle, #menu .card, #menu .menu-foot {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
#menu.on .title, #menu.on .subtitle, #menu.on .card, #menu.on .menu-foot {
  opacity: 1;
  transform: none;
}
#menu.on .card:nth-child(1) { transition-delay: 0.12s; }
#menu.on .card:nth-child(2) { transition-delay: 0.2s; }
#menu.on .card:nth-child(3) { transition-delay: 0.28s; }

/* ---- game overlay (attract mode) -------------------------------------- */
#gameui {
  padding: 18px 22px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.chip {
  border: 1px solid var(--hairline-soft);
  background: rgba(9, 11, 15, 0.55);
  padding: 8px 14px;
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--dim);
  transition: border-color 0.18s ease, color 0.18s ease;
}
#back-btn:hover { border-color: var(--amber); color: var(--amber); }
.chip-dim { border-color: transparent; background: none; color: rgba(236, 231, 221, 0.4); }
/* The chip's affordance (Esc exits to menu) is FALSE during a live run —
   Esc pauses and "back" is consumed there (2.2 routing) — so a GAME boot
   hides it (#gameui.live; the HUD PAUSE chip owns that exit). It returns
   for GAMEOVER, where Esc really does quit to the menu. The mode label
   keeps its right corner: with the chip hidden it is the only flex child,
   so space-between would slide it left. */
#gameui.live #back-btn { display: none; }
#gameui.live #mode-label { margin-left: auto; }

/* ---- in-run HUD (task 5.1) --------------------------------------------- */
/* Minimal numerals strip + touch pause chip; placement comes from the
   mode's hudLayout() class (.hud-run). The root stays pointer-events:none
   in EVERY state — only the chip re-enables — so the full-viewport root
   can never eat gameplay swipes. #pause's scrim (later sibling) covers the
   idle numerals while paused and blocks the chip (2.3 note: HUD chips
   unclickable under the overlay, which is wanted). Numerals get one
   restrained charcoal text-shadow for the bright-dusk-sky case (the only
   legibility scrim — no boxes; the .chip recipe covers the corner). */
#hud, #hud.on { pointer-events: none; }
.hud-run .hud-strip {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: stretch;
  gap: 20px;
}
.hud-stat {
  display: grid;
  justify-items: center;
  gap: 3px;
}
.hud-label {
  font-size: 10px;
  letter-spacing: 0.3em;
  margin-right: -0.3em; /* optically recenter tracked caps */
  color: var(--dim);
  text-shadow: 0 1px 8px rgba(7, 9, 12, 0.55);
}
.hud-num {
  font-size: 32px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
  text-shadow: 0 1px 12px rgba(7, 9, 12, 0.6);
}
.hud-unit {
  margin-left: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--dim);
}
.hud-sep { width: 1px; background: var(--hairline-soft); }
.hud-run .hud-chip {
  position: absolute;
  right: 22px;
  bottom: 18px;
  pointer-events: auto;
}

/* ---- pause overlay ------------------------------------------------------ */
/* Panel uses the card recipe (solid charcoal fill + amber-tinted hairlines,
   no backdrop-filter — SwiftShader cost; must hold over dusk AND night). */
#pause { display: grid; place-items: center; }
.pause-scrim {
  position: absolute;
  inset: 0;
  background: rgba(7, 9, 12, 0.55); /* flat legibility dim; world stays readable behind */
}
.pause-panel {
  position: relative;
  z-index: 1;
  width: min(320px, 84vw);
  padding: 30px 30px 18px;
  border: 1px solid rgba(255, 178, 77, 0.38);
  border-top: 2px solid rgba(255, 178, 77, 0.5);
  background: rgba(12, 14, 18, 0.86);
  display: grid;
  gap: 10px;
}
.pause-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.42em;
  margin-right: -0.42em; /* optically recenter tracked caps */
  text-align: center;
  color: var(--bone);
}
.pause-rule { height: 1px; background: var(--hairline); margin: 2px 0 8px; }
.pause-btn {
  padding: 12px 18px;
  border: 1px solid var(--hairline-soft);
  background: rgba(9, 11, 15, 0.55);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.34em;
  margin-right: -0.34em;
  text-align: center;
  color: var(--dim);
  transition: border-color 0.18s ease, color 0.18s ease;
}
.pause-btn:hover { border-color: var(--hairline); color: var(--bone); }
.pause-btn.primary {
  border-color: rgba(255, 178, 77, 0.95);
  background: rgba(27, 20, 11, 0.86);
  color: var(--amber);
}
.pause-hint {
  margin-top: 6px;
  text-align: center;
  font-size: 10px;
  letter-spacing: 0.3em;
  margin-right: -0.3em;
  color: var(--dim);
}

/* staged reveal (menu pattern) */
#pause .pause-title, #pause .pause-rule, #pause .pause-btn, #pause .pause-hint {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
#pause.on .pause-title, #pause.on .pause-rule, #pause.on .pause-btn, #pause.on .pause-hint {
  opacity: 1;
  transform: none;
}
#pause.on .pause-btn:nth-of-type(1) { transition-delay: 0.12s; }
#pause.on .pause-btn:nth-of-type(2) { transition-delay: 0.18s; }
#pause.on .pause-btn:nth-of-type(3) { transition-delay: 0.24s; }
#pause.on .pause-hint { transition-delay: 0.3s; }

/* ---- gameover overlay ---------------------------------------------------- */
/* PAUSED's panel recipe (solid charcoal + amber hairlines, no
   backdrop-filter) with a stats grid: giant amber numerals over hairline
   rules; the world stays readable behind the flat scrim (death reveal). */
#gameover { display: grid; place-items: center; }
.gameover-scrim {
  position: absolute;
  inset: 0;
  background: rgba(7, 9, 12, 0.6); /* a touch deeper than pause: stats legibility */
}
.gameover-panel {
  position: relative;
  z-index: 1;
  width: min(360px, 88vw);
  padding: 30px 30px 18px;
  border: 1px solid rgba(255, 178, 77, 0.38);
  border-top: 2px solid rgba(255, 178, 77, 0.5);
  background: rgba(12, 14, 18, 0.86);
  display: grid;
  gap: 10px;
}
.gameover-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.42em;
  margin-right: -0.42em; /* optically recenter tracked caps */
  text-align: center;
  color: var(--bone);
}
.gameover-rule { height: 1px; background: var(--hairline); margin: 2px 0 2px; }
.go-flag {
  display: none; /* only set with the stats; never an empty slot */
  align-items: center;
  gap: 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.42em;
  margin-right: -0.42em;
  color: var(--amber);
}
.go-flag.on { display: flex; }
.go-flag::before, .go-flag::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--hairline);
}
.go-stat + .go-stat {
  border-top: 1px solid var(--hairline-soft);
  padding-top: 8px;
}
.go-stat-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--dim);
}
.go-num {
  font-size: 44px;
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}
.go-unit {
  margin-left: 6px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--dim);
}
.go-best {
  border-top: 1px solid var(--hairline-soft);
  padding-top: 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--dim);
  text-align: center;
}

/* staged reveal (menu/pause pattern) */
#gameover .gameover-title, #gameover .gameover-rule, #gameover .go-flag,
#gameover .go-stat, #gameover .go-best, #gameover .pause-btn,
#gameover .pause-hint {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
#gameover.on .gameover-title, #gameover.on .gameover-rule, #gameover.on .go-flag,
#gameover.on .go-stat, #gameover.on .go-best, #gameover.on .pause-btn,
#gameover.on .pause-hint {
  opacity: 1;
  transform: none;
}
#gameover.on .go-stat:nth-child(1) { transition-delay: 0.1s; }
#gameover.on .go-stat:nth-child(2) { transition-delay: 0.16s; }
#gameover.on .go-stat:nth-child(3) { transition-delay: 0.22s; }
#gameover.on .go-best { transition-delay: 0.28s; }
#gameover.on .pause-btn:nth-of-type(1) { transition-delay: 0.34s; }
#gameover.on .pause-btn:nth-of-type(2) { transition-delay: 0.4s; }
#gameover.on .pause-hint { transition-delay: 0.46s; }

/* webgl failure notice */
#boot-fail {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  z-index: 40;
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--dim);
}