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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: #000;
  font-family: "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  user-select: none;
}

#game { position: fixed; inset: 0; display: block; }

#hud { position: fixed; inset: 0; pointer-events: none; }

#top-left {
  position: absolute; top: 16px; left: 18px;
  color: #fff; font-weight: 900; font-style: italic;
  font-size: 17px; line-height: 1.7;
  text-shadow: 0 2px 5px rgba(0,0,0,.7);
}
#top-left .big { font-size: 28px; color: #ffd94d; }
#environment-badge {
  width: fit-content; margin-top: 8px; padding: 7px 11px;
  border: 1px solid rgba(255,255,255,.28); border-radius: 999px;
  background: rgba(7,18,40,.55); color: #dff5ff;
  font: 800 12px/1.2 Arial, sans-serif; letter-spacing: .04em;
  backdrop-filter: blur(6px); box-shadow: 0 4px 14px rgba(0,0,0,.22);
}

#map {
  position: absolute; top: 16px; right: 16px;
  background: rgba(0,0,0,.35);
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(0,0,0,.35);
}

#bottom-left { position: absolute; left: 22px; bottom: 20px; }

#speed {
  color: #fff; font-size: 66px; font-weight: 900; font-style: italic;
  line-height: 1; text-shadow: 0 3px 10px rgba(0,0,0,.75);
}
#speed .unit { font-size: 20px; margin-left: 8px; color: #ffd94d; }

#gauge {
  width: 270px; height: 20px; margin-top: 12px;
  background: rgba(0,0,0,.55);
  border: 2px solid rgba(255,255,255,.75);
  border-radius: 10px; overflow: hidden;
}
#gauge-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, #35c1ff, #2f7bff 60%, #b44dff);
}
#gauge-fill.full {
  background: linear-gradient(90deg, #ffd94d, #ff8a00);
  animation: pulse .4s infinite alternate;
}
@keyframes pulse { from { filter: brightness(1); } to { filter: brightness(1.5); } }

#boost-hint { margin-top: 8px; color: rgba(255,255,255,.8); font-size: 13px; text-shadow: 0 1px 3px rgba(0,0,0,.8); }

#center-msg {
  position: fixed; left: 50%; top: 36%;
  transform: translate(-50%, -50%);
  font-size: 140px; font-weight: 900; font-style: italic;
  color: #fff; display: none;
  text-shadow: 0 0 34px rgba(255,170,0,.95), 0 6px 14px rgba(0,0,0,.5);
}

#overlay, #result {
  position: fixed; inset: 0; z-index: 10;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0, 18, 40, .55);
  backdrop-filter: blur(4px);
}
.hidden { display: none !important; }

.panel {
  background: linear-gradient(160deg, rgba(22, 44, 88, .94), rgba(10, 16, 38, .96));
  border: 2px solid rgba(120, 180, 255, .55);
  border-radius: 22px;
  padding: 38px 56px;
  color: #fff; text-align: center;
  box-shadow: 0 24px 70px rgba(0,0,0,.55);
}

.panel h1 {
  font-size: 56px; font-style: italic; letter-spacing: 3px;
  color: #ffd94d;
  text-shadow: 0 4px 0 #c96a1e, 0 8px 18px rgba(0,0,0,.6);
}
.panel h2 {
  font-size: 40px; font-style: italic; color: #ffd94d;
  text-shadow: 0 3px 0 #c96a1e;
  margin-bottom: 18px;
}
.panel .sub { margin-top: 10px; color: #9ecbff; font-size: 16px; }
.race-preview {
  width: fit-content; margin: 14px auto -8px; padding: 7px 13px;
  color: #dff7ff; font: 800 13px/1.25 Arial, sans-serif;
  border: 1px solid rgba(90,210,255,.34); border-radius: 999px;
  background: rgba(36,104,164,.24);
}

.keys {
  list-style: none; margin: 26px auto 6px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px 40px; text-align: left;
  font-size: 16px; color: #dce8ff;
}
.keys b {
  display: inline-block; min-width: 108px;
  color: #ffd94d; font-style: italic;
}

.start { margin-top: 26px; font-size: 20px; color: #fff; }
.start b { color: #7dff9b; }

.rline { font-size: 20px; margin: 10px 0; color: #dce8ff; }
.rline b { color: #ffd94d; font-size: 26px; font-style: italic; margin-left: 10px; }

#item-slot {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%);
  width: 214px; min-height: 86px; padding: 7px 10px 7px 7px;
  display: grid; grid-template-columns: 72px 1fr; align-items: center; gap: 10px;
  color: #fff; text-align: left; pointer-events: none; z-index: 6;
  background: linear-gradient(145deg, rgba(13,34,72,.93), rgba(6,14,36,.9));
  border: 1px solid rgba(151,200,255,.42); border-radius: 18px;
  box-shadow: 0 8px 24px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.12);
  transition: width .2s ease, border-color .2s ease, box-shadow .2s ease;
}
#item-frame {
  position: relative; width: 72px; height: 72px; overflow: hidden;
  display: grid; place-items: center;
  background: radial-gradient(circle at 50% 38%, rgba(70,133,255,.24), rgba(2,8,24,.72) 70%);
  border: 2px solid rgba(177,211,255,.42); border-radius: 15px;
  box-shadow: inset 0 0 18px rgba(47,123,255,.18);
  transition: border-color .2s ease, box-shadow .2s ease;
}
#item-frame::before {
  content: ""; position: absolute; inset: 11px; border-radius: 50%;
  border: 1px solid rgba(126,181,255,.2);
}
#item-icon {
  position: relative; z-index: 2; width: 64px; height: 64px;
  object-fit: contain; filter: drop-shadow(0 5px 7px rgba(0,0,0,.45));
}
#item-icon[hidden] { display: none; }
#item-scan {
  position: absolute; z-index: 1; left: 14px; right: 14px; top: 50%; height: 2px;
  background: rgba(91,171,255,.28); box-shadow: 0 0 9px rgba(53,193,255,.45);
  animation: itemscan 2.2s ease-in-out infinite alternate;
}
#item-copy { min-width: 0; }
#item-name {
  overflow: hidden; color: rgba(219,234,255,.5); font-size: 15px; font-weight: 900;
  line-height: 1.25; white-space: nowrap; text-overflow: ellipsis;
  text-shadow: 0 2px 4px rgba(0,0,0,.6);
}
#item-key { margin-top: 8px; font-size: 12px; color: rgba(255,255,255,.64); text-shadow: 0 1px 3px rgba(0,0,0,.8); }
#item-key kbd {
  display: inline-grid; min-width: 25px; height: 22px; margin-right: 5px; place-items: center;
  color: #0d1b36; font: 900 13px/1 "Arial Black", sans-serif;
  background: #dbeaff; border: 0; border-radius: 6px; box-shadow: inset 0 -2px 0 rgba(23,55,103,.28);
}
#item-slot.ready { border-color: rgba(255,217,77,.7); box-shadow: 0 0 22px rgba(255,190,45,.24), 0 8px 24px rgba(0,0,0,.4); }
#item-slot.ready #item-frame { border-color: #ffd94d; box-shadow: 0 0 18px rgba(255,217,77,.38), inset 0 0 18px rgba(47,123,255,.25); }
#item-slot.ready #item-name { color: #fff; }
#item-slot.ready #item-icon { animation: itembob 1.05s ease-in-out infinite alternate; }
#item-slot.empty-fire-ready { border-color: rgba(255,138,93,.95); box-shadow: 0 0 24px rgba(255,101,64,.35), 0 8px 24px rgba(0,0,0,.4); }
#item-slot.empty-fire-ready #item-key { color: #ffb08f; font-weight: 900; }
#item-slot.spinning #item-icon { animation: itemroll .14s ease-in-out infinite alternate; }
#item-slot.asset-error #item-name { color: #ffb4a2; }
#item-effect {
  grid-column: 1 / -1; min-height: 26px; margin-top: -1px; padding: 3px 8px;
  display: flex; align-items: center; gap: 7px;
  color: #bceaff; font-size: 12px; font-weight: 900;
  background: rgba(29,113,183,.22); border: 1px solid rgba(113,215,255,.28); border-radius: 9px;
}
#item-effect[hidden] { display: none; }
#item-effect-icon { width: 22px; height: 22px; object-fit: contain; filter: drop-shadow(0 2px 4px rgba(0,0,0,.4)); }
#item-effect-time { margin-left: auto; font-variant-numeric: tabular-nums; }
@keyframes itembob { from { transform: translateY(1px) scale(.96); } to { transform: translateY(-3px) scale(1.02); } }
@keyframes itemroll { from { transform: scale(.72) rotate(-7deg); filter: brightness(.9) blur(.2px); } to { transform: scale(1.02) rotate(7deg); filter: brightness(1.45); } }
@keyframes itemscan { from { transform: translateY(-20px); opacity: .35; } to { transform: translateY(20px); opacity: .85; } }

@media (max-width: 760px) {
  #item-slot { top: 10px; width: 188px; grid-template-columns: 62px 1fr; }
  #item-frame { width: 62px; height: 62px; }
  #item-icon { width: 56px; height: 56px; }
  #item-name { font-size: 13px; }
}

@media (max-width: 520px) {
  #top-left {
    top: 12px;
    left: 12px;
    font-size: 14px;
    line-height: 1.55;
  }
  #top-left .big { font-size: 23px; }
  #environment-badge {
    max-width: 172px;
    margin-top: 6px;
    padding: 5px 8px;
    font-size: 10px;
  }
  #map {
    top: 12px;
    right: 12px;
    width: 145px;
    height: 145px;
  }
  #item-slot {
    top: 169px;
    width: 172px;
    min-height: 64px;
    padding: 5px 8px 5px 5px;
    grid-template-columns: 52px 1fr;
    gap: 8px;
    border-radius: 15px;
  }
  #item-frame { width: 52px; height: 52px; border-radius: 12px; }
  #item-icon { width: 48px; height: 48px; }
  #item-key { margin-top: 4px; }
}

#toast {
  position: fixed; top: 24%; left: 50%; transform: translateX(-50%);
  font-size: 30px; font-weight: 900; font-style: italic;
  color: #ffd94d; opacity: 0; pointer-events: none; z-index: 6;
  text-shadow: 0 2px 8px rgba(0,0,0,.7);
  transition: opacity .3s;
}

#fx-flash { position: fixed; inset: 0; pointer-events: none; opacity: 0; z-index: 5; }

#boost-fx {
  position: fixed; inset: 0; pointer-events: none; z-index: 4; opacity: 0; transition: opacity .25s;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0) 52%, rgba(255,138,0,.4) 100%);
}
#boost-fx.on { opacity: 1; }

#speed-fx {
  position: fixed; inset: -22%; pointer-events: none; z-index: 4; opacity: 0; transition: opacity .3s;
  background: repeating-conic-gradient(from 0deg, rgba(255,255,255,0) 0deg 5deg, rgba(255,255,255,.16) 5deg 6.5deg);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, transparent 40%, #000 78%);
  mask-image: radial-gradient(circle at 50% 50%, transparent 40%, #000 78%);
  animation: speedspin .5s linear infinite;
}
#speed-fx.on { opacity: 1; }
@keyframes speedspin { to { transform: rotate(6.5deg); } }

#center-msg.pop { animation: msgpop .5s ease-out; }
@keyframes msgpop {
  0% { transform: translate(-50%, -50%) scale(2.6); opacity: 0; }
  35% { opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}