:root {
  --bg: #0e1116;
  --bg-elev: #171b21;
  --bg-card: #1a1f27;
  --sub: #5a6678;
  --text: #d2d6dc;
  --main: #e2b714;
  --main-dim: #8a6f0d;
  --error: #ca4754;
  --good: #56c271;
  --blue: #4ab0e2;
  --radius: 12px;
  --mono: "SFMono-Regular", "Roboto Mono", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;
}

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

html, body {
  height: 100%;
  background:
    radial-gradient(1200px 600px at 50% -10%, #1b2230 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--mono);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

.app { height: 100%; position: relative; }

/* ---------- Screens ---------- */
.screen {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  padding: 24px;
}
.screen.active { display: flex; }

/* ---------- Menu ---------- */
.menu { align-items: center; justify-content: center; gap: 8px; text-align: center; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo { font-size: 40px; color: var(--main); }
.brand h1 { font-size: 44px; font-weight: 800; letter-spacing: -1px; }
.brand .accent { color: var(--main); }
.tagline { color: var(--sub); font-size: 15px; margin-bottom: 22px; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(220px, 280px));
  gap: 18px;
}
.card {
  background: var(--bg-card);
  border: 1px solid #232a34;
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  font-family: var(--mono);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .14s ease, border-color .14s, box-shadow .14s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--main);
  box-shadow: 0 12px 30px -12px rgba(226,183,20,.35);
}
.card-emoji { font-size: 34px; }
.card-title { font-size: 20px; font-weight: 700; }
.card-desc { font-size: 12.5px; color: var(--sub); line-height: 1.5; flex: 1; }
.card-best { font-size: 12px; color: var(--main); }
.card-cta { font-size: 14px; font-weight: 700; color: var(--main); }
.hint { color: var(--sub); font-size: 12.5px; margin-top: 26px; }
kbd { background: var(--bg-elev); border-radius: 4px; padding: 1px 6px; font-size: 11px; color: var(--text); }

/* ---------- Shared game chrome ---------- */
.game { gap: 16px; }
.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.back {
  background: none;
  border: none;
  color: var(--sub);
  font-family: var(--mono);
  font-size: 14px;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 8px;
  transition: color .12s, background .12s;
}
.back:hover { color: var(--text); background: var(--bg-elev); }
.hud-stats { display: flex; gap: 18px; align-items: center; font-size: 16px; color: var(--sub); }
.hud-item b { color: var(--text); }
.hud-item.score b { color: var(--main); }

/* ---------- Overlay ---------- */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 13, 18, .82);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
  z-index: 5;
  padding: 24px;
}
.overlay.hidden { display: none; }
.overlay-title { font-size: 38px; font-weight: 800; }
.overlay-sub { color: var(--sub); font-size: 14px; max-width: 440px; line-height: 1.5; }
.overlay-stats { display: flex; gap: 30px; margin: 6px 0; flex-wrap: wrap; justify-content: center; }
.overlay-stats .ostat { display: flex; flex-direction: column; gap: 2px; }
.overlay-stats .ostat span { font-size: 30px; font-weight: 700; color: var(--main); }
.overlay-stats .ostat small { font-size: 11px; color: var(--sub); }
.overlay-btns { display: flex; gap: 12px; margin-top: 8px; }
.btn {
  background: var(--bg-card);
  border: 1px solid #2a323d;
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  padding: 11px 22px;
  border-radius: 9px;
  cursor: pointer;
  transition: transform .1s, background .12s, border-color .12s;
}
.btn:hover { transform: translateY(-2px); border-color: var(--main); }
.btn.primary { background: var(--main); color: #1a1400; border-color: var(--main); font-weight: 700; }
.btn.primary:hover { background: #f0c531; }

.diff-pick { display: flex; align-items: center; gap: 8px; color: var(--sub); font-size: 13px; }
.chip {
  background: var(--bg-card);
  border: 1px solid #2a323d;
  color: var(--sub);
  font-family: var(--mono);
  padding: 5px 12px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 13px;
}
.chip.active { color: var(--main); border-color: var(--main); }

/* ---------- Defense ---------- */
#screen-defense { padding-bottom: 0; }
#def-canvas {
  flex: 1;
  width: 100%;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, #0c1018 0%, #0e131c 70%, #12161f 100%);
  border: 1px solid #1c232e;
}

/* ---------- Word prompt (race + survival) ---------- */
.word-prompt {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 46px;
  letter-spacing: 1px;
  user-select: none;
}
.word-prompt.big { font-size: 60px; }
.word-prompt .ch { color: var(--sub); }
.word-prompt .ch.done { color: var(--good); }
.word-prompt .ch.bad { color: var(--error); background: rgba(202,71,84,.18); border-radius: 3px; }
.word-prompt .ch.cur { border-bottom: 3px solid var(--main); }

/* ---------- Race ---------- */
.race-track { display: flex; flex-direction: column; gap: 20px; padding: 24px 0 8px; }
.lane { display: flex; flex-direction: column; gap: 6px; }
.lane-label { font-size: 13px; color: var(--sub); }
.lane-strip {
  position: relative;
  height: 46px;
  background: repeating-linear-gradient(90deg, #161b23 0 38px, #131820 38px 40px);
  border-radius: 10px;
  border: 1px solid #1c232e;
}
.runner {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translate(0, -50%);
  font-size: 28px;
  transition: left .25s cubic-bezier(.3,1.4,.5,1);
}
.flag { position: absolute; top: 50%; right: 8px; transform: translateY(-50%); font-size: 26px; opacity: .5; }

/* ---------- Survival ---------- */
.surv-timebar {
  height: 14px;
  background: var(--bg-card);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 4px;
  border: 1px solid #1c232e;
}
.surv-timefill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--good), var(--main));
  transition: width .12s linear, background .3s;
}
.surv-timefill.low { background: linear-gradient(90deg, var(--error), #e2731b); }
.surv-flash {
  height: 28px;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--good);
  opacity: 0;
  transition: opacity .25s;
}
.surv-flash.show { opacity: 1; }
.surv-flash.penalty { color: var(--error); }

/* hidden attribute must win */
[hidden] { display: none !important; }

@media (max-width: 760px) {
  .cards { grid-template-columns: 1fr; max-width: 360px; }
  .word-prompt { font-size: 34px; }
  .word-prompt.big { font-size: 40px; }
  .brand h1 { font-size: 34px; }
}