:root {
  --bg: #05030d;
  --panel: rgba(12, 8, 29, 0.82);
  --panel-soft: rgba(255, 255, 255, 0.045);
  --line: rgba(150, 124, 255, 0.32);
  --line-cyan: rgba(32, 246, 255, 0.28);
  --text: #f8f7ff;
  --muted: #a19ac7;
  --purple: #7c5cff;
  --cyan: #20f6ff;
  --pink: #ff3b86;
  --gold: #ffd166;
  --green: #63ffb1;
  --shadow: 0 24px 90px rgba(0, 0, 0, 0.46);
}

* { box-sizing: border-box; }
html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
body { position: relative; }
button, input { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

#game {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  background: var(--bg);
  touch-action: manipulation;
}

.is-hidden { display: none !important; }
.glass {
  background: linear-gradient(180deg, rgba(17, 12, 43, 0.82), rgba(7, 6, 20, 0.72));
  border: 1px solid var(--line);
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.22), inset 0 0 30px rgba(124, 92, 255, 0.035);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.glass-soft {
  background: var(--panel-soft);
  border: 1px solid rgba(255, 255, 255, 0.085);
  border-radius: 16px;
}

.hud {
  position: fixed;
  z-index: 10;
  inset: max(14px, env(safe-area-inset-top)) 16px auto 16px;
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto minmax(200px, 1fr);
  gap: 12px;
  align-items: start;
  pointer-events: none;
}
.brand-panel {
  justify-self: start;
  min-width: 210px;
  padding: 11px 14px 12px;
  border-radius: 15px;
}
.eyebrow {
  display: block;
  color: var(--cyan);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.2em;
}
.brand-panel strong {
  display: block;
  margin-top: 2px;
  font-size: 22px;
  letter-spacing: 0.08em;
}
.brand-panel small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
}
.stat-row {
  justify-self: center;
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 520px;
}
.stat {
  min-width: 76px;
  padding: 7px 10px;
  border-radius: 999px;
  text-align: center;
}
.stat span {
  display: block;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.13em;
}
.stat b { font-size: 15px; }
.vitals {
  justify-self: end;
  width: min(230px, 24vw);
  min-width: 205px;
  padding: 10px 11px;
  border-radius: 15px;
}
.vital-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.11em;
}
.vital-line b { color: var(--text); font-size: 10px; letter-spacing: 0; }
.vital-line em { color: var(--cyan); font-style: normal; }
.pulse-line { margin-top: 8px; }
.meter {
  width: 100%;
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  margin-bottom: 7px;
}
.meter i { display: block; height: 100%; width: 100%; transition: width 90ms linear; }
.shield-meter i { background: linear-gradient(90deg, #276cff, var(--cyan)); box-shadow: 0 0 15px rgba(32, 246, 255, 0.5); }
.hull-meter i { background: linear-gradient(90deg, var(--pink), #ff7b73); box-shadow: 0 0 15px rgba(255, 59, 134, 0.42); }
.pulse-meter i { background: linear-gradient(90deg, var(--purple), var(--cyan)); box-shadow: 0 0 15px rgba(124, 92, 255, 0.52); }

.build-panel {
  position: fixed;
  z-index: 11;
  left: 16px;
  bottom: max(16px, env(safe-area-inset-bottom));
  width: 230px;
  max-height: min(360px, 48vh);
  overflow: hidden;
  border-radius: 15px;
  pointer-events: auto;
}
.build-panel:not(.open) #buildContents { display: none; }
.build-panel.open { padding-bottom: 8px; }
.icon-button {
  width: 100%;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--cyan);
  text-align: left;
  padding: 10px 12px;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.16em;
  cursor: pointer;
}
.build-title {
  color: var(--muted);
  padding: 2px 12px 7px;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.14em;
}
.build-list {
  padding: 0 8px 4px;
  max-height: 280px;
  overflow: auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.build-list::-webkit-scrollbar { display: none; }
.build-item {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: #ddd9ff;
  font-size: 10px;
}
.build-item b { color: var(--cyan); white-space: nowrap; }
.build-list .empty { display: block; color: var(--muted); font-size: 10px; padding: 8px; }

.boss-hud {
  position: fixed;
  z-index: 9;
  top: 104px;
  left: 50%;
  transform: translateX(-50%);
  width: min(620px, calc(100vw - 36px));
  pointer-events: none;
}
.boss-title {
  display: flex;
  justify-content: space-between;
  color: var(--pink);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.16em;
  margin-bottom: 6px;
}
.boss-title b { color: #ffd5e6; }
.boss-meter {
  height: 8px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 59, 134, 0.25);
  border-radius: 999px;
  overflow: hidden;
}
.boss-meter i {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--pink), var(--purple), var(--cyan));
  box-shadow: 0 0 18px rgba(255, 59, 134, 0.55);
  transition: width 170ms ease;
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: max(18px, env(safe-area-inset-top)) 18px max(18px, env(safe-area-inset-bottom));
  background:
    radial-gradient(circle at 50% 30%, rgba(124, 92, 255, 0.16), transparent 38%),
    linear-gradient(rgba(3, 2, 10, 0.76), rgba(3, 2, 10, 0.93));
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}
.overlay.passive { pointer-events: none; background: transparent; backdrop-filter: none; -webkit-backdrop-filter: none; }
.panel {
  width: min(860px, 94vw);
  max-height: 92vh;
  overflow: auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
  padding: clamp(24px, 4vw, 42px);
  border-radius: 26px;
  background:
    linear-gradient(180deg, rgba(17, 12, 43, 0.93), rgba(5, 4, 16, 0.94)),
    radial-gradient(circle at 0 0, rgba(32, 246, 255, 0.06), transparent 40%);
  border: 1px solid rgba(124, 92, 255, 0.42);
  box-shadow: var(--shadow), inset 0 0 60px rgba(124, 92, 255, 0.025);
}

.panel::-webkit-scrollbar { display: none; }
.panel-kicker {
  color: var(--cyan);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.22em;
}
.menu-panel h1 {
  margin: 8px 0 12px;
  font-size: clamp(54px, 10vw, 104px);
  line-height: 0.86;
  letter-spacing: -0.045em;
  text-shadow: 0 0 42px rgba(124, 92, 255, 0.33);
}
.menu-panel h1 span { color: var(--cyan); }
.lede {
  width: min(680px, 100%);
  margin: 0 0 24px;
  color: #b3acd4;
  font-size: 15px;
  line-height: 1.6;
}
.menu-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 12px;
  margin: 20px 0 24px;
}
.menu-grid > div { padding: 15px; }
.menu-grid h2,
.compact-panel h2,
.upgrade-panel h2,
.gameover-panel h2 {
  margin: 0 0 12px;
  font-size: 25px;
  letter-spacing: 0.04em;
}
.menu-info ul { list-style: none; padding: 0; margin: 0; }
.menu-info li {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 12px;
  align-items: center;
  padding: 7px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.055);
  color: var(--muted);
  font-size: 12px;
}
kbd {
  display: inline-block;
  width: fit-content;
  padding: 3px 6px;
  border-radius: 6px;
  border: 1px solid rgba(32, 246, 255, 0.28);
  background: rgba(32, 246, 255, 0.06);
  color: #dffeff;
  font-family: inherit;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.08em;
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.08);
}
.records > div,
.summary-grid > div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.055);
  color: var(--muted);
  font-size: 11px;
}
.records b { color: var(--text); font-size: 15px; }
.menu-actions, .stack-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.stack-actions { margin-top: 22px; }
.horizontal-actions { justify-content: center; }
.primary-button,
.secondary-button,
.text-button,
.upgrade-card {
  appearance: none;
  cursor: pointer;
  border: 0;
}
.primary-button,
.secondary-button {
  padding: 13px 19px;
  border-radius: 11px;
  font-size: 11px;
  font-weight: 950;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}
.primary-button {
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  color: #071016;
  box-shadow: 0 12px 34px rgba(124, 92, 255, 0.24);
}
.secondary-button {
  background: rgba(255, 255, 255, 0.055);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.11);
}
.text-button {
  background: transparent;
  color: var(--muted);
  padding: 12px 10px;
  font-size: 11px;
  font-weight: 800;
}
.primary-button:hover, .secondary-button:hover, .upgrade-card:hover { transform: translateY(-2px); }
.microcopy {
  margin: 16px 0 0;
  color: #777094;
  font-size: 10px;
  line-height: 1.5;
}
.compact-panel { width: min(470px, 92vw); text-align: center; }
.compact-panel p, .upgrade-panel > p { color: var(--muted); }
.compact-panel .stack-actions { justify-content: center; }

.upgrade-panel { width: min(1050px, 95vw); }
.upgrade-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 22px;
}
.upgrade-card {
  position: relative;
  min-height: 250px;
  padding: 18px;
  text-align: left;
  border-radius: 17px;
  color: var(--text);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025));
  border: 1px solid rgba(255, 255, 255, 0.11);
  overflow: hidden;
}
.upgrade-card::after {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  right: -36px;
  bottom: -38px;
  background: currentColor;
  opacity: 0.055;
  filter: blur(2px);
}
.upgrade-card.common { color: #d9dcff; }
.upgrade-card.rare { color: var(--cyan); border-color: rgba(32, 246, 255, 0.29); }
.upgrade-card.epic { color: #bf8dff; border-color: rgba(191, 141, 255, 0.38); box-shadow: inset 0 0 40px rgba(124, 92, 255, 0.05); }
.upgrade-key {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  border: 1px solid currentColor;
  font-size: 10px;
  font-weight: 950;
}
.upgrade-rarity {
  float: right;
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.74;
}
.upgrade-card h3 {
  clear: both;
  margin: 30px 0 8px;
  color: var(--text);
  font-size: 21px;
}
.upgrade-card p {
  color: #a7a0c6;
  font-size: 12px;
  line-height: 1.55;
}
.upgrade-level {
  position: absolute;
  left: 18px;
  bottom: 16px;
  color: currentColor;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.gameover-panel { width: min(700px, 94vw); text-align: center; }
.new-record {
  display: inline-block;
  margin: 2px 0 14px;
  color: #071016;
  background: linear-gradient(135deg, var(--gold), var(--cyan));
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 9px;
  font-weight: 950;
  letter-spacing: 0.12em;
}
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 18px 0;
}
.summary-grid > div {
  display: block;
  padding: 13px;
  border: 1px solid rgba(255, 255, 255, 0.075);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
}
.summary-grid span { display: block; margin-bottom: 4px; font-size: 9px; text-transform: uppercase; letter-spacing: 0.1em; }
.summary-grid b { color: var(--text); font-size: 19px; }

.toast,
.combo-burst {
  position: fixed;
  z-index: 21;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  text-align: center;
  opacity: 0;
}
.toast {
  top: 27%;
  color: var(--text);
  font-size: clamp(26px, 5vw, 58px);
  font-weight: 950;
  letter-spacing: 0.08em;
  text-shadow: 0 0 30px rgba(124, 92, 255, 0.76);
}
.combo-burst {
  top: 38%;
  color: var(--cyan);
  font-size: 16px;
  font-weight: 950;
  letter-spacing: 0.15em;
  text-shadow: 0 0 20px rgba(32, 246, 255, 0.6);
}
.mobile-input {
  position: fixed;
  z-index: 1;
  left: 50%;
  bottom: 1px;
  width: 2px;
  height: 2px;
  opacity: 0.01;
  pointer-events: none;
}
.mobile-hint {
  position: fixed;
  z-index: 12;
  left: 50%;
  bottom: max(18px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: none;
  color: var(--muted);
  background: rgba(5, 3, 13, 0.7);
  border: 1px solid rgba(124, 92, 255, 0.18);
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 8px;
  font-weight: 850;
  letter-spacing: 0.11em;
  pointer-events: none;
}

@media (max-width: 900px) {
  .hud {
    grid-template-columns: 1fr 1fr;
  }
  .brand-panel { grid-column: 1; grid-row: 1; }
  .vitals { grid-column: 2; grid-row: 1; width: min(230px, 46vw); }
  .stat-row { grid-column: 1 / 3; grid-row: 2; margin-top: 0; }
  .boss-hud { top: 149px; }
  .menu-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .hud { inset: max(8px, env(safe-area-inset-top)) 8px auto 8px; gap: 7px; }
  .brand-panel { min-width: 0; padding: 8px 9px; }
  .brand-panel strong { font-size: 17px; }
  .brand-panel .eyebrow { font-size: 7px; }
  .brand-panel small { font-size: 7px; }
  .vitals { min-width: 0; width: 48vw; padding: 7px 8px; }
  .stat-row { gap: 4px; }
  .stat { min-width: 61px; padding: 5px 6px; }
  .stat span { font-size: 7px; }
  .stat b { font-size: 12px; }
  .boss-hud { top: 132px; }
  .build-panel { left: 8px; bottom: 8px; width: 170px; }
  .menu-panel h1 { font-size: clamp(52px, 20vw, 84px); }
  .upgrade-cards { grid-template-columns: 1fr; }
  .upgrade-card { min-height: 180px; }
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
  .menu-info li { grid-template-columns: 94px 1fr; }
  .mobile-hint { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .primary-button, .secondary-button, .upgrade-card { transition: none; }
}