:root {
  color-scheme: dark;
  --panel: rgba(8, 16, 22, 0.8);
  --panel-strong: rgba(10, 22, 29, 0.92);
  --border: rgba(157, 215, 255, 0.22);
  --text: #eff7fa;
  --muted: #9eb8c2;
  --accent: #6fffd6;
  --shadow: rgba(0, 0, 0, 0.35);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
* { box-sizing: border-box; }
html, body, #app {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: radial-gradient(circle at top, rgba(84, 145, 255, 0.16), transparent 42%), linear-gradient(180deg, #173646 0%, #071117 100%);
  color: var(--text);
}
body { user-select: none; }
#game { width: 100%; height: 100%; display: block; }
#app { position: relative; }
.screen-fx {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0) 36%, rgba(3, 7, 14, 0.12) 70%, rgba(1, 3, 8, 0.38) 100%),
    radial-gradient(circle at 50% 16%, rgba(146, 211, 255, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(255, 214, 140, 0.06), transparent 22%, transparent 78%, rgba(14, 28, 46, 0.12));
}
.screen-fx::before,
.screen-fx::after {
  content: "";
  position: absolute;
  inset: 0;
}
.screen-fx::before {
  opacity: 0.2;
  background-image: repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.02) 0 1px, transparent 1px 3px);
}
.screen-fx::after {
  opacity: 0.14;
  background:
    radial-gradient(circle at 50% 50%, transparent 0 58%, rgba(255, 255, 255, 0.04) 72%, transparent 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 28%);
}
#overlay, #hud { position: fixed; inset: 0; pointer-events: none; z-index: 2; }
.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 100%), var(--panel);
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px var(--shadow);
  backdrop-filter: blur(14px);
}
.title-panel {
  width: min(560px, calc(100vw - 32px));
  margin: 8vh auto 0;
  padding: 28px 30px;
  border-radius: 28px;
  text-align: center;
  pointer-events: auto;
}
.eyebrow { margin: 0; color: var(--accent); text-transform: uppercase; letter-spacing: 0.28em; font-size: 0.72rem; }
.title-panel h1 { margin: 10px 0 12px; font-size: clamp(2.8rem, 7vw, 4.8rem); line-height: 0.92; }
.subtitle, .tips { margin: 0 auto; max-width: 46ch; color: var(--muted); line-height: 1.5; }
.tips { margin-top: 18px; font-size: 0.94rem; }
#startButton {
  margin: 22px 0 18px;
  padding: 14px 24px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(120deg, #71ffd7, #8ad4ff);
  color: #03222d;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 18px 32px rgba(111, 255, 214, 0.24);
}
#announce { position: absolute; left: 50%; top: 24px; transform: translateX(-50%); padding: 12px 18px; border-radius: 999px; font-size: 0.92rem; }
.loot-popup {
  position: absolute;
  left: 50%;
  top: 82px;
  width: min(360px, calc(100vw - 36px));
  padding: 14px 16px;
  border-radius: 20px;
  pointer-events: none;
  opacity: 0;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity 260ms ease, transform 260ms ease;
}
.loot-popup.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.loot-popup h3 {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.loot-popup span {
  display: block;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.45;
}
.loot-popup span + span {
  margin-top: 3px;
}
.hidden { display: none !important; }
.hud-top, .hud-bottom { position: absolute; left: 18px; right: 18px; display: grid; gap: 14px; }
.hud-top { top: 14px; grid-template-columns: minmax(220px, 280px) minmax(220px, 340px) minmax(210px, 260px); align-items: start; justify-content: space-between; }
.hud-bottom { bottom: 18px; grid-template-columns: 1fr minmax(240px, 340px); }
.stat-stack, .center-panel, .ammo-panel, .inventory-panel, .event-panel, .upgrade-panel { padding: 14px 16px; border-radius: 18px; }
.center-panel {
  justify-self: center;
  width: min(100%, 340px);
  padding: 10px 14px;
  border-radius: 16px;
  text-align: center;
}
.label { display: block; color: var(--muted); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.1em; }
.value { display: block; margin-top: 5px; font-size: 0.95rem; }
.bar { width: 100%; height: 10px; margin-top: 8px; border-radius: 999px; overflow: hidden; background: rgba(255, 255, 255, 0.08); }
.fill { height: 100%; width: 100%; border-radius: inherit; transition: width 140ms ease; }
.health-fill { background: linear-gradient(90deg, #4cff95, #c7ff80); }
.armor-fill { background: linear-gradient(90deg, #55a7ff, #7fdcff); }
.mini-row { display: flex; justify-content: center; gap: 10px; color: var(--accent); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.08em; }
#objectiveText { margin: 5px 0 0; font-size: 0.84rem; line-height: 1.3; }
.ammo-panel { text-align: right; }
#weaponName { display: block; font-size: 1.15rem; font-weight: 700; }
.tier { display: inline-block; margin-top: 6px; padding: 3px 10px; border-radius: 999px; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; }
.tier.common { color: #dfe9ef; background: rgba(255, 255, 255, 0.1); }
.tier.rare { color: #a8e2ff; background: rgba(101, 183, 255, 0.18); }
.tier.epic { color: #ffd1a6; background: rgba(255, 160, 84, 0.18); }
.tier.legendary { color: #fff2a8; background: rgba(255, 225, 102, 0.2); }
.ammo-row { margin-top: 10px; display: flex; justify-content: space-between; gap: 8px; font-size: 1.18rem; font-weight: 700; }
.inventory-panel, .event-panel { font-size: 0.86rem; line-height: 1.35; }
#inventoryText { display: block; }
.upgrade-panel { position: absolute; right: 18px; bottom: 88px; width: min(360px, calc(100vw - 36px)); max-height: min(62vh, 520px); overflow: auto; border-radius: 24px; background: var(--panel-strong); }
.upgrade-panel h2 { margin: 0 0 6px; }
.upgrade-panel p { margin: 0 0 14px; color: var(--muted); font-size: 0.92rem; }
.upgrade-panel ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.upgrade-panel li { padding: 10px 12px; border-radius: 14px; background: rgba(255, 255, 255, 0.04); }
.upgrade-panel strong { display: block; margin-bottom: 4px; }
.prompt { position: absolute; left: 50%; bottom: 112px; transform: translateX(-50%); padding: 10px 16px; border-radius: 999px; background: rgba(0, 0, 0, 0.7); border: 1px solid rgba(255, 255, 255, 0.12); font-size: 0.92rem; }
.crosshair { position: absolute; left: 50%; top: 50%; width: 20px; height: 20px; transform: translate(-50%, -50%); }
.crosshair::before, .crosshair::after { content: ""; position: absolute; background: rgba(255, 255, 255, 0.92); box-shadow: 0 0 14px rgba(255, 255, 255, 0.35); }
.crosshair::before { left: 9px; top: 0; width: 2px; height: 20px; }
.crosshair::after { left: 0; top: 9px; width: 20px; height: 2px; }
#minimap {
  position: absolute;
  right: 18px;
  top: 146px;
  width: 170px;
  height: 170px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(4, 12, 20, 0.55);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.3);
}
@media (max-width: 960px) {
  .hud-top, .hud-bottom { grid-template-columns: 1fr; }
  #minimap { width: 132px; height: 132px; top: auto; bottom: 92px; }
  .title-panel { margin-top: 4vh; padding: 22px 18px; }
}