:root {
  --bg: #040914;
  --panel: #0b1628;
  --panel-edge: #1d3557;
  --ink: #e6eef8;
  --ink-dim: #8fa3b8;
  --cyan: #3fd0ff;
  --amber: #ffb347;
  --red: #ff4d5a;
  --display: 'Orbitron', 'Segoe UI', system-ui, sans-serif;
  --body: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  -webkit-user-select: none;
  user-select: none;
}

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

.hidden { display: none !important; }

/* ---------- HUD ---------- */
#hud {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: center;
  gap: clamp(10px, 3vw, 44px);
  padding: 12px 16px 18px;
  background: linear-gradient(to bottom, rgba(4, 9, 20, .92), rgba(4, 9, 20, 0));
  pointer-events: none;
}
.hud-cell { display: flex; flex-direction: column; align-items: center; min-width: 64px; }
.hud-wide { min-width: 150px; }
.hud-label {
  font-family: var(--display);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.hud-value {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(13px, 2vw, 19px);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.hud-accent { color: var(--amber); text-transform: uppercase; letter-spacing: .08em; }

/* ---------- Banner & subtitle ---------- */
#banner {
  position: fixed;
  left: 0; right: 0; top: 34%;
  text-align: center;
  pointer-events: none;
  animation: bannerIn .35s ease-out;
}
#bannerTitle {
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: .5em;
  text-transform: uppercase;
  color: var(--cyan);
}
#bannerSub {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(26px, 6vw, 58px);
  letter-spacing: .08em;
  text-transform: uppercase;
  text-shadow: 0 0 28px rgba(63, 208, 255, .45);
}
@keyframes bannerIn { from { opacity: 0; transform: scale(1.12); } to { opacity: 1; transform: none; } }

#subtitle {
  position: fixed;
  left: 50%; bottom: 22px;
  transform: translateX(-50%);
  max-width: 90vw;
  padding: 8px 16px;
  border-left: 3px solid var(--red);
  background: rgba(11, 22, 40, .85);
  font-family: var(--display);
  font-size: clamp(11px, 1.6vw, 14px);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--amber);
  pointer-events: none;
}

/* ---------- Modals ---------- */
#overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  background: radial-gradient(ellipse at center, rgba(4, 9, 20, .55), rgba(4, 9, 20, .9));
  backdrop-filter: blur(3px);
}
.modal {
  width: min(480px, 100%);
  max-height: 100%;
  overflow: auto;
  padding: 30px 32px 28px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-top: 3px solid var(--cyan);
  border-radius: 6px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .6);
}
.eyebrow {
  margin: 0 0 6px;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
h1, h2 { margin: 0; font-family: var(--display); font-weight: 900; text-wrap: balance; }
h1 {
  font-size: clamp(56px, 16vw, 92px);
  line-height: 1;
  letter-spacing: .14em;
  margin-right: -.14em;
  color: var(--amber);
  text-shadow: 0 4px 0 #a8551a, 0 0 40px rgba(255, 179, 71, .35);
}
h2 { font-size: 34px; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 20px; }
.tagline { margin: 10px 0 20px; color: var(--ink-dim); font-size: 14px; }

.missions {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}
.missions li {
  padding: 8px 2px;
  border: 1px solid var(--panel-edge);
  border-radius: 4px;
  font-size: 10.5px;
  line-height: 1.3;
  color: var(--ink-dim);
}
.missions b { display: block; font-family: var(--display); font-size: 16px; color: var(--cyan); }

.keys { display: grid; gap: 8px; margin-bottom: 24px; font-size: 12.5px; color: var(--ink); }
.keys span { display: block; margin-top: 3px; color: var(--ink-dim); }
kbd {
  display: inline-block;
  min-width: 24px;
  padding: 2px 6px;
  margin: 0 1px;
  border: 1px solid var(--panel-edge);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: #101f38;
  font-family: var(--body);
  font-size: 11.5px;
}

.btn {
  display: block;
  width: 100%;
  padding: 13px 18px;
  border: 0;
  border-radius: 4px;
  background: var(--cyan);
  color: #04121f;
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .22em;
  text-transform: uppercase;
  cursor: pointer;
  transition: filter .15s, transform .1s;
}
.btn:hover { filter: brightness(1.12); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
.btn-ghost { margin-top: 10px; background: transparent; color: var(--ink-dim); border: 1px solid var(--panel-edge); }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 0 0 24px; }
.stats dt { font-family: var(--display); font-size: 10px; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-dim); }
.stats dd { margin: 4px 0 0; font-family: var(--display); font-weight: 700; font-size: 17px; font-variant-numeric: tabular-nums; }

@media (max-width: 520px) {
  .modal { padding: 22px 18px; }
  .hud-wide { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  #banner { animation: none; }
}

.credit { margin: 16px 0 0; font-size: 11.5px; line-height: 1.5; color: var(--ink-dim); }
.credit a { color: var(--cyan); }

/* ---------- Mode select ---------- */
.modal-wide { width: min(620px, 100%); }
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0 0 4px; }
.mode-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  text-align: left;
  background: #0f1e36;
  border: 1px solid var(--panel-edge);
  border-radius: 6px;
  color: var(--ink);
  font-family: var(--body);
  cursor: pointer;
  transition: border-color .15s, transform .1s, background .15s;
}
.mode-card:hover { border-color: var(--cyan); background: #12253f; }
.mode-card:active { transform: translateY(1px); }
.mode-card:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
.mode-tag { font-family: var(--display); font-size: 10px; letter-spacing: .24em; text-transform: uppercase; color: var(--ink-dim); }
.mode-name { font-family: var(--display); font-weight: 900; font-size: 22px; letter-spacing: .08em; text-transform: uppercase; color: var(--cyan); }
.mode-classic .mode-name { font-family: 'Press Start 2P', var(--display); font-weight: 400; font-size: 17px; letter-spacing: 0; color: var(--amber); line-height: 1.5; }
.mode-desc { font-size: 12.5px; line-height: 1.5; color: var(--ink-dim); }
@media (max-width: 520px) { .modes { grid-template-columns: 1fr; } }

/* ---------- Arcade original ---------- */
#classic {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: #000;
  touch-action: none;
}