:root {
  --near-black: #05070a;
  --panel: #0c1016;
  --panel-2: #11161e;
  --steel: #8b98a5;
  --steel-dim: #4a535c;
  --cyan: #4fd8e8;
  --orange: #ff9540;
  --white: #eef4f8;
  --red: #ff4d4d;
  --deep-blue: #1a2c4d;
  --font: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0; width: 100%; height: 100%;
  background: var(--near-black); color: var(--white);
  font-family: var(--font);
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: none;
  user-select: none;
}

#app { position: fixed; inset: 0; }

.screen {
  position: absolute; inset: 0;
  display: none;
  flex-direction: column;
  padding: max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  overflow-y: auto;
}
.screen.active { display: flex; }

/* ---------- Loading ---------- */
.loading-wrap { margin: auto; text-align: center; }
.logo-mark {
  font-size: 2.4rem; font-weight: 800; letter-spacing: 0.08em;
  color: var(--white);
}
.logo-mark.small { font-size: 1.8rem; }
.logo-mark span { color: var(--cyan); }
.loading-bar {
  width: min(70vw, 320px); height: 6px; margin: 20px auto 10px;
  background: var(--panel-2); border-radius: 4px; overflow: hidden;
  border: 1px solid var(--steel-dim);
}
.loading-fill { height: 100%; width: 0%; background: var(--cyan); transition: width 0.2s linear; }
.loading-label { color: var(--steel); font-size: 0.85rem; letter-spacing: 0.05em; }

/* ---------- Menu ---------- */
#screen-menu { align-items: center; justify-content: center; }
.menu-panel { text-align: center; width: min(90vw, 380px); }
.tagline { color: var(--steel); margin: 10px 0 28px; font-size: 0.95rem; }
.menu-list { display: flex; flex-direction: column; gap: 10px; }
.menu-btn {
  padding: 14px 18px; font-size: 1rem; font-weight: 600;
  background: var(--panel-2); color: var(--white);
  border: 1px solid var(--steel-dim); border-radius: 8px;
  cursor: pointer; letter-spacing: 0.03em;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}
.menu-btn:active { transform: scale(0.97); }
.menu-btn:hover { border-color: var(--cyan); }
.menu-btn.primary { background: var(--deep-blue); border-color: var(--cyan); color: var(--white); }
.menu-footer { margin-top: 26px; color: var(--steel-dim); font-size: 0.75rem; }

/* ---------- Subscreens ---------- */
.subscreen-header { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.subscreen-header h1 { font-size: 1.3rem; margin: 0; letter-spacing: 0.04em; }
.icon-btn {
  width: 40px; height: 40px; border-radius: 8px;
  background: var(--panel-2); border: 1px solid var(--steel-dim); color: var(--white);
  font-size: 1.1rem; cursor: pointer;
}

.mission-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px; overflow-y: auto; padding-bottom: 20px;
}
.mission-card {
  background: var(--panel-2); border: 1px solid var(--steel-dim); border-radius: 10px;
  padding: 14px; cursor: pointer; text-align: left; position: relative;
}
.mission-card.locked { opacity: 0.4; cursor: not-allowed; }
.mission-card .num { color: var(--cyan); font-size: 0.75rem; letter-spacing: 0.08em; }
.mission-card .name { font-weight: 700; margin: 4px 0 8px; font-size: 0.95rem; }
.mission-card .rank { position: absolute; top: 12px; right: 12px; font-weight: 800; color: var(--orange); }
.mission-card .score { color: var(--steel); font-size: 0.78rem; }

.stats-list, .settings-list { display: flex; flex-direction: column; gap: 10px; max-width: 480px; }
.stat-row, .setting-row {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--panel-2); border: 1px solid var(--steel-dim); border-radius: 8px;
  padding: 12px 16px; font-size: 0.9rem;
}
.setting-row input[type=range] { width: 140px; }

/* ---------- Upgrades ---------- */
.credits-readout {
  margin-left: auto; color: var(--orange); font-weight: 700; letter-spacing: 0.04em;
  background: var(--panel-2); border: 1px solid var(--steel-dim); border-radius: 8px; padding: 8px 14px;
}
.upgrade-list { display: flex; flex-direction: column; gap: 12px; max-width: 520px; }
.upgrade-card {
  background: var(--panel-2); border: 1px solid var(--steel-dim); border-radius: 10px; padding: 16px 18px;
}
.upgrade-card .row1 { display: flex; justify-content: space-between; align-items: baseline; }
.upgrade-card .name { font-weight: 700; font-size: 1rem; }
.upgrade-card .desc { color: var(--steel); font-size: 0.82rem; margin: 4px 0 10px; }
.upgrade-card .effect { color: var(--cyan); font-size: 0.8rem; margin-bottom: 10px; }
.upgrade-dots { display: flex; gap: 6px; }
.upgrade-dots span {
  width: 18px; height: 6px; border-radius: 3px; background: var(--steel-dim);
}
.upgrade-dots span.filled { background: var(--cyan); }
.upgrade-buy {
  padding: 8px 16px; font-size: 0.85rem; font-weight: 700; border-radius: 7px;
  background: var(--deep-blue); border: 1px solid var(--cyan); color: var(--white); cursor: pointer;
}
.upgrade-buy:disabled { opacity: 0.35; cursor: not-allowed; border-color: var(--steel-dim); }
.upgrade-buy.maxed { background: transparent; border-color: var(--steel-dim); color: var(--steel); }

/* ---------- Damage vignette ---------- */
.damage-vignette {
  position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(ellipse at center, rgba(255,77,77,0) 55%, rgba(255,77,77,0.45) 100%);
  transition: opacity 0.08s ease-out;
}

/* ---------- Mission Brief ---------- */
#screen-brief { align-items: center; justify-content: center; }
.brief-panel { width: min(90vw, 460px); background: var(--panel-2); border: 1px solid var(--steel-dim); border-radius: 12px; padding: 26px; }
.brief-eyebrow { color: var(--cyan); letter-spacing: 0.12em; font-size: 0.78rem; }
.brief-panel h1 { margin: 6px 0 12px; }
.brief-text { color: var(--steel); line-height: 1.5; }
.brief-stats { display: flex; gap: 18px; margin: 16px 0; }
.brief-stats > div { display: flex; flex-direction: column; }
.brief-stats .k { font-size: 0.7rem; color: var(--steel-dim); letter-spacing: 0.06em; }
.brief-stats .v { font-size: 1.1rem; font-weight: 700; color: var(--white); }
.brief-objectives { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; font-size: 0.85rem; color: var(--steel); }
.brief-actions { display: flex; gap: 10px; }
.brief-actions .menu-btn { flex: 1; }

/* ---------- Game view ---------- */
#screen-game { padding: 0; }
#gameCanvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; background: #05070a; }

.hud { position: absolute; inset: 0; pointer-events: none; padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) 0 max(12px, env(safe-area-inset-left)); }
.hud-top-left { position: absolute; top: 12px; left: 12px; display: flex; flex-direction: column; gap: 6px; width: 180px; }
.hud-top-right { position: absolute; top: 12px; right: 12px; pointer-events: auto; }
.hud-top-center { position: absolute; top: 10px; left: 50%; transform: translateX(-50%); text-align: center; }

.bar-group { display: flex; align-items: center; gap: 8px; }
.bar-label { font-size: 0.65rem; letter-spacing: 0.08em; color: var(--steel); width: 32px; }
.bar { flex: 1; height: 10px; background: rgba(10,14,20,0.7); border: 1px solid var(--steel-dim); border-radius: 5px; overflow: hidden; }
.bar-fill { height: 100%; width: 100%; background: var(--cyan); transition: width 0.12s linear, background 0.2s; }
.hull-bar .bar-fill { background: var(--cyan); }
.hull-bar .bar-fill.warn { background: var(--red); }
.heat-bar .bar-fill { background: var(--steel); }
.heat-bar .bar-fill.hot { background: var(--orange); }
.heat-bar .bar-fill.critical { background: var(--red); }

.objective-text { font-size: 0.8rem; color: var(--white); background: rgba(5,7,10,0.55); padding: 4px 10px; border-radius: 6px; }
.cargo-readout { font-size: 0.75rem; color: var(--cyan); margin-top: 4px; letter-spacing: 0.04em; }
.timer-readout { font-size: 0.85rem; color: var(--orange); margin-top: 2px; font-weight: 700; }

.radar {
  position: absolute; bottom: 16px; right: 16px;
  border-radius: 50%; border: 1px solid var(--steel-dim);
  background: rgba(5,7,10,0.55);
}

.combo-readout {
  position: absolute; top: 90px; left: 50%; transform: translateX(-50%);
  font-size: 1.1rem; font-weight: 800; color: var(--orange);
  text-shadow: 0 0 8px rgba(255,149,64,0.6);
}
.combo-readout.combo-pop { animation: combo-pop 0.32s cubic-bezier(.2,1.4,.4,1); }
@keyframes combo-pop {
  0% { transform: translateX(-50%) scale(1.6); text-shadow: 0 0 18px rgba(255,149,64,0.95); }
  100% { transform: translateX(-50%) scale(1); text-shadow: 0 0 8px rgba(255,149,64,0.6); }
}

.extraction-banner {
  position: absolute; top: 130px; left: 50%; transform: translateX(-50%);
  background: rgba(79,216,232,0.15); border: 1px solid var(--cyan); color: var(--cyan);
  padding: 6px 14px; border-radius: 6px; font-size: 0.78rem; letter-spacing: 0.05em;
  animation: pulse-banner 1.4s ease-in-out infinite;
}
@keyframes pulse-banner { 0%,100% { opacity: 0.75; } 50% { opacity: 1; } }

/* ---------- Mobile controls ---------- */
.mobile-controls { position: absolute; inset: 0; pointer-events: none; }
.joy-zone {
  position: absolute; left: 18px; bottom: 18px; width: 130px; height: 130px;
  border-radius: 50%; background: rgba(255,255,255,0.05); border: 1px solid var(--steel-dim);
  pointer-events: auto; touch-action: none;
}
.joy-knob {
  position: absolute; left: 50%; top: 50%; width: 56px; height: 56px; margin: -28px 0 0 -28px;
  border-radius: 50%; background: rgba(79,216,232,0.35); border: 1px solid var(--cyan);
}
.action-buttons {
  position: absolute; right: 14px; bottom: 14px; width: 200px; height: 190px;
  pointer-events: none;
}
.ctrl-btn {
  position: absolute; border-radius: 50%; border: 1px solid var(--steel-dim);
  color: var(--white); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
  background: rgba(255,255,255,0.06); pointer-events: auto; touch-action: none;
}
.fire-btn { width: 84px; height: 84px; right: 0; bottom: 46px; background: rgba(255,77,77,0.18); border-color: var(--red); }
.thrust-btn { width: 84px; height: 84px; right: 90px; bottom: 0; background: rgba(79,216,232,0.18); border-color: var(--cyan); }
.tractor-btn { width: 62px; height: 62px; right: 0; bottom: 140px; background: rgba(255,149,64,0.18); border-color: var(--orange); }
.brake-btn { width: 56px; height: 56px; right: 150px; bottom: 66px; background: rgba(139,152,165,0.18); }

/* ---------- Overlays ---------- */
.overlay {
  position: absolute; inset: 0; background: rgba(5,7,10,0.86);
  display: flex; align-items: center; justify-content: center; pointer-events: auto;
}
.overlay[hidden] { display: none; }
.overlay-panel {
  width: min(90vw, 420px); background: var(--panel-2); border: 1px solid var(--steel-dim);
  border-radius: 12px; padding: 28px; text-align: center;
}
.overlay-panel h2 { margin-top: 0; }
.overlay-panel .menu-btn { width: 100%; margin-top: 10px; }
.rank-badge { font-size: 3rem; font-weight: 900; color: var(--orange); text-shadow: 0 0 16px rgba(255,149,64,0.6); }
.result-list { text-align: left; margin: 16px 0; display: flex; flex-direction: column; gap: 6px; font-size: 0.88rem; color: var(--steel); }
.result-list .hi { color: var(--white); font-weight: 700; }
.result-list .row { display: flex; justify-content: space-between; }

/* ---------- Reduced motion / high contrast ---------- */
body.reduced-motion .extraction-banner { animation: none; }
body.high-contrast .bar { border-width: 2px; }
body.high-contrast .objective-text { background: rgba(0,0,0,0.85); }

/* ---------- Responsive ---------- */
@media (min-width: 820px) {
  .mobile-controls { display: none; }
}
@media (max-width: 819px) {
  .hud-top-left { width: 140px; }
  .radar { width: 100px; height: 100px; }
}