.odd-section {
  max-width: 560px;
  margin: 10px auto 0 auto;
  padding: 28px 22px;
  background: #FAE9D5;
  border-radius: 18px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.74);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.odd-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.65), rgba(255, 255, 255, 0) 40%);
  pointer-events: none;
  opacity: 0.55;
}

.fto-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(12, 14, 22, 0.68);
  backdrop-filter: blur(8px);
  z-index: 30;
}

.fto-overlay-card {
  width: min(440px, calc(100% - 48px));
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 22px;
  padding: 22px 22px 20px;
  text-align: center;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.35);
  position: relative;
  z-index: 1;
}

.fto-overlay-title {
  font-size: 2.1rem;
  font-weight: 900;
  color: #0d1020;
  letter-spacing: 0.01em;
}

.fto-overlay-subtitle {
  margin-top: 6px;
  font-size: 1.02rem;
  font-weight: 600;
  color: rgba(13, 16, 32, 0.75);
}

.fto-score-label {
  margin-top: 16px;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(13, 16, 32, 0.55);
}

.fto-score-label-tight {
  margin-top: 12px;
}

.fto-score {
  margin-top: 6px;
  font-size: 4.1rem;
  font-weight: 900;
  line-height: 1;
  color: #0d1020;
}

.fto-score-small {
  font-size: 2.4rem;
  opacity: 0.9;
}

.fto-overlay-btn {
  margin-top: 18px;
  padding: 12px 42px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  color: #fff;
  font-weight: 900;
  font-size: 1.1rem;
  background: linear-gradient(90deg, #111 0%, #2a2f4a 100%);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.22);
  transition: transform 0.12s, box-shadow 0.2s, filter 0.2s;
  font-family: 'Poppins', sans-serif;
}

.fto-overlay-btn:hover {
  transform: translateY(-2px);
  filter: saturate(1.1);
  box-shadow: 0 22px 52px rgba(0, 0, 0, 0.28);
}

.fto-overlay-btn:active {
  transform: translateY(0px) scale(0.99);
}

.fto-topbar {
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
  align-items: stretch;
}

.quick-math-challenge-section .odd-hud {
  margin-bottom: 16px;
  width: 100%;
  position: relative;
  z-index: 1;
}

.quick-math-challenge-section .odd-hud .odd-stat {
  background: rgba(255, 255, 255, 0);
  border: none;
}

.quick-math-challenge-section .odd-hud .odd-stat-label {
  letter-spacing: 0.08em;
}

.time-meter {
  width: 100%;
  height: 40px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.08);
  overflow: hidden;
  margin-top: 0px;
}

.time-meter-fill {
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  border-radius: 10px;
  background: #7abf70;
  transition: transform 120ms linear;
}

.time-meter-fill[data-level="ok"] {
  filter: saturate(1.05);
}

.time-meter-fill[data-level="mid"] {
  filter: saturate(1.3);
}

.time-meter-fill[data-level="low"] {
  filter: saturate(1.6);
  animation: qmPulse 420ms ease-in-out infinite;
}

@keyframes qmPulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.55;
  }
}

/* Old HUD/buttons/result removed; overlays handle flow now */

.odd-goal {
  width: 100%;
  margin: 0 0 12px 0;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.04);
  border: 2px solid rgba(0, 0, 0, 0.06);
  font-weight: 800;
  color: #111;
  letter-spacing: 0.01em;
  position: relative;
  z-index: 1;
}

.odd-goal-target {
  color: var(--main-color);
  font-size: xx-large;
}

.odd-board {
  width: 100%;
  height: 360px;
  border-radius: 16px;
  background: rgba(0, 0, 0, 0.03);
  position: relative;
  overflow: hidden;
  z-index: 1;

  /* Defaults (JS can override per-level via inline CSS vars on this element) */
  --odd-box-w: 72px;
  --odd-box-h: 46px;
  --odd-box-font: 1.35rem;
}

.odd-overlay {
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: rgba(0, 0, 0, 0.72);
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 18px;
}

.odd-overlay-text {
  color: #fff;
  font-weight: 900;
  letter-spacing: 0.01em;
  font-size: 1.35rem;
  line-height: 1.2;
}

.odd-box {
  width: var(--odd-box-w);
  height: var(--odd-box-h);
  border-radius: 10%;
  background: #fd4242;
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: var(--odd-box-font);
  letter-spacing: 0.02em;
  user-select: none;
  cursor: pointer;
  color: #fdfdfd;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.10);
  /* border: 4px solid #ff7676; */
  transition: top 900ms cubic-bezier(.18, .89, .32, 1.18), left 900ms cubic-bezier(.18, .89, .32, 1.18), transform 900ms cubic-bezier(.18, .89, .32, 1.18);
}

.odd-box.found {
  background: #43a047;
  border-color: #43a047;
  box-shadow: 0 10px 18px rgba(67, 160, 71, 0.18);
}

.odd-box.wrong {
  border-color: var(--main-color);
  box-shadow: 0 10px 18px rgba(255, 3, 3, 0.18);
}

.odd-box.disabled {
  pointer-events: none;
  cursor: default;
}

/* Medium screens */
@media (max-width: 1000px) {
  .odd-section {
    max-width: 560px;
    margin: 36px auto 0 auto;
    padding: 20px 18px;
  }

  .odd-board {
    height: 360px;
  }

  .fto-overlay-card {
    width: min(520px, calc(100% - 48px));
    padding: 16px 16px 14px;
    border-radius: 18px;
  }

  .fto-overlay-title {
    font-size: 1.95rem;
  }

  .fto-overlay-subtitle {
    font-size: 1.02rem;
  }

  .fto-score {
    font-size: 3.6rem;
  }

  .fto-overlay-btn {
    padding: 12px 36px;
    font-size: 1.04rem;
  }

  .fto-topbar {
    gap: 10px;
  }

  .fto-stat {
    padding: 8px 12px;
    gap: 4px;
  }

  .fto-stat-label {
    font-size: 0.7rem;
    font-weight: 800;
  }

  .fto-stat-value {
    font-size: 1.2rem;
    font-weight: 900;
  }

  .odd-goal {
    margin: 0 0 12px 0;
    padding: 9px 11px;
    font-weight: 800;
  }

  /* Slightly reduce base box sizes to give room on narrower viewports */
  .odd-board {
    --odd-box-w: 64px;
    --odd-box-h: 42px;
    --odd-box-font: 1.2rem;
  }
}

/* Larger small screens */
@media (max-width: 800px) {
  .odd-section {
    max-width: 540px;
    margin: 28px auto 0 auto;
    padding: 18px 16px;
  }

  .odd-board {
    height: 340px;
  }

  .fto-overlay-card {
    width: min(480px, calc(100% - 40px));
    padding: 14px 14px 12px;
    border-radius: 16px;
  }

  .fto-overlay-title {
    font-size: 1.6rem;
  }

  .fto-overlay-subtitle {
    font-size: 1rem;
  }

  .fto-score {
    font-size: 3.2rem;
  }

  .fto-overlay-btn {
    padding: 10px 30px;
    font-size: 1rem;
  }

  .fto-topbar {
    gap: 8px;
    flex-direction: row;
  }

  .fto-stat {
    padding: 7px 10px;
    gap: 3px;
  }

  .fto-stat-label {
    font-size: 0.6rem;
    font-weight: 700;
  }

  .fto-stat-value {
    font-size: 1rem;
    font-weight: 800;
  }

  .odd-goal {
    margin: 0 0 10px 0;
    padding: 8px 9px;
    font-weight: 800;
  }

  /* Further reduce base box sizes for tighter layouts */
  .odd-board {
    --odd-box-w: 56px;
    --odd-box-h: 38px;
    --odd-box-font: 1.05rem;
  }
}

@media (max-width: 600px) {
  .odd-section {
    max-width: 90%;
    margin: 20px auto 0 auto;
    padding: 12px 14px;
  }

  .odd-board {
    height: 380px;
  }

  .odd-box {
    width: var(--odd-box-w);
    height: var(--odd-box-h);
    font-size: var(--odd-box-font);
  }

  .odd-goal {
    margin: 0 0 8px 0;
    padding: 6px 8px;
    font-weight: 700;
  }

  .fto-overlay-card {
    padding: 14px 14px 12px;
    width: min(360px, calc(100% - 32px));
  }

  .fto-overlay-title {
    font-size: 1.6rem;
  }

  .fto-overlay-subtitle {
    font-size: 0.9rem;
  }

  .fto-overlay-btn {
    padding: 10px 30px;
    font-size: 0.98rem;
  }

  .odd-overlay-text {
    font-size: 0.95rem;
  }
}