:root {
  color-scheme: dark;
  --panel: rgba(13, 20, 22, 0.72);
  --ink: #f4fbf8;
  --muted: #a7b8b4;
  --line: rgba(220, 255, 246, 0.14);
  --danger: #ff4f64;
  --danger-2: #ff7f50;
  --ready: #28f59b;
  --ready-2: #52d6ff;
  --wait: #ffd166;
  --accent: #72f6ff;
  --violet: #b897ff;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.34);
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(140deg, #070d0c 0%, #0d1717 45%, #111314 100%);
  background-size: 42px 42px, 42px 42px, auto;
  color: var(--ink);
  overflow-x: hidden;
}

button {
  color: inherit;
  font: inherit;
}

.app-shell {
  position: relative;
  z-index: 1;
  display: grid;
  width: min(920px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 22px 0;
}

.test-deck {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.masthead,
.mini-stats {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 2.65rem;
  line-height: 1.02;
  letter-spacing: 0;
}

.live-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid rgba(114, 246, 255, 0.22);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(114, 246, 255, 0.08);
  font-weight: 750;
}

.live-dot {
  width: 10px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--ready);
  box-shadow: 0 0 20px var(--ready);
}

.mini-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 16px;
}

.mini-stats div {
  display: grid;
  gap: 5px;
  min-width: 0;
  padding: 12px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.055);
}

.stat-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.mini-stats strong {
  font-size: 1.16rem;
}

.single-instruction {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid rgba(40, 245, 155, 0.28);
  border-radius: var(--radius);
  background: rgba(40, 245, 155, 0.08);
  color: var(--ink);
  box-shadow: var(--shadow);
  font-size: 1.08rem;
  font-weight: 900;
  text-align: center;
}

.reaction-pad {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 500px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 34%),
    radial-gradient(circle at center, rgba(114, 246, 255, 0.12), transparent 18rem),
    rgba(10, 14, 15, 0.78);
  box-shadow:
    0 38px 100px rgba(0, 0, 0, 0.46),
    inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  cursor: pointer;
  isolation: isolate;
  touch-action: manipulation;
  user-select: none;
  transition: transform 120ms ease;
}

.reaction-pad:hover {
  transform: translateY(-1px);
}

.reaction-pad:focus-visible {
  outline: 3px solid rgba(114, 246, 255, 0.82);
  outline-offset: 4px;
}

.pad-aura,
.pad-ring,
.pad-core {
  position: absolute;
  border-radius: 50%;
}

.pad-aura {
  width: min(66vw, 520px);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(114, 246, 255, 0.16), transparent 66%);
  filter: blur(5px);
  transform: scale(0.94);
  transition:
    background 160ms ease,
    transform 220ms ease,
    opacity 160ms ease;
}

.pad-ring {
  width: min(58vw, 430px);
  aspect-ratio: 1;
  border: 2px solid rgba(114, 246, 255, 0.34);
  background:
    conic-gradient(from 90deg, rgba(114, 246, 255, 0), rgba(114, 246, 255, 0.6), rgba(184, 151, 255, 0), rgba(255, 209, 102, 0.44), rgba(114, 246, 255, 0)),
    radial-gradient(circle, rgba(0, 0, 0, 0.18), transparent 55%);
  mask-image: radial-gradient(circle, transparent 0 52%, #000 53% 63%, transparent 64%);
  animation: spin 7s linear infinite;
  opacity: 0.8;
}

.pad-core {
  z-index: 1;
  display: grid;
  place-items: center;
  width: min(58vw, 360px);
  aspect-ratio: 1;
  padding: 36px;
  border: 4px solid rgba(255, 255, 255, 0.16);
  background:
    radial-gradient(circle at 38% 32%, rgba(255, 255, 255, 0.09), transparent 0.9rem),
    #172123;
  box-shadow:
    inset 0 0 45px rgba(114, 246, 255, 0.08),
    0 0 0 10px rgba(255, 255, 255, 0.035);
  color: var(--ink);
  text-align: center;
}

.pad-title {
  font-size: 3.9rem;
  font-weight: 950;
  line-height: 0.9;
  letter-spacing: 0;
}

.reaction-pad.is-waiting {
  border-color: rgba(255, 79, 100, 0.36);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 34%),
    radial-gradient(circle at center, rgba(255, 79, 100, 0.2), transparent 22rem),
    rgba(17, 12, 13, 0.9);
}

.reaction-pad.is-waiting .pad-aura {
  background: radial-gradient(circle, rgba(255, 79, 100, 0.3), transparent 67%);
}

.reaction-pad.is-waiting .pad-ring {
  border-color: rgba(255, 79, 100, 0.38);
  background: conic-gradient(from 20deg, transparent, rgba(255, 79, 100, 0.74), transparent, rgba(255, 127, 80, 0.62), transparent);
}

.reaction-pad.is-waiting .pad-core {
  background:
    radial-gradient(circle at 38% 32%, rgba(255, 255, 255, 0.18), transparent 0.9rem),
    #e3263f;
  box-shadow:
    0 0 70px rgba(227, 38, 63, 0.28),
    0 0 0 10px rgba(227, 38, 63, 0.16);
}

.reaction-pad.is-ready {
  border-color: rgba(40, 245, 155, 0.72);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 34%),
    radial-gradient(circle at center, rgba(40, 245, 155, 0.26), transparent 23rem),
    rgba(6, 22, 15, 0.92);
}

.reaction-pad.is-ready .pad-aura {
  background: radial-gradient(circle, rgba(40, 245, 155, 0.45), transparent 67%);
  transform: scale(1.08);
}

.reaction-pad.is-ready .pad-ring {
  border-color: rgba(40, 245, 155, 0.7);
  background: conic-gradient(from 150deg, transparent, rgba(40, 245, 155, 0.9), rgba(82, 214, 255, 0.76), transparent);
  animation-duration: 2.6s;
}

.reaction-pad.is-ready .pad-core {
  background:
    radial-gradient(circle at 38% 32%, rgba(255, 255, 255, 0.72), transparent 0.8rem),
    radial-gradient(circle at center, #48ffae 0%, #20e48a 54%, #0da55d 100%);
  box-shadow:
    0 0 90px rgba(40, 245, 155, 0.55),
    inset 0 -28px 52px rgba(0, 62, 36, 0.32),
    0 0 0 10px rgba(24, 228, 120, 0.18);
}

.reaction-pad.is-too-soon {
  border-color: rgba(255, 209, 102, 0.68);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 34%),
    radial-gradient(circle at center, rgba(255, 209, 102, 0.22), transparent 22rem),
    rgba(29, 20, 4, 0.86);
}

.reaction-pad.is-too-soon .pad-core {
  background:
    radial-gradient(circle at 38% 32%, rgba(255, 255, 255, 0.35), transparent 0.8rem),
    var(--wait);
  box-shadow: 0 0 0 10px rgba(255, 209, 102, 0.18);
}

.reaction-pad.is-complete {
  border-color: rgba(184, 151, 255, 0.68);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 34%),
    radial-gradient(circle at center, rgba(184, 151, 255, 0.22), transparent 22rem),
    rgba(16, 11, 29, 0.85);
}

.reaction-pad.is-complete .pad-core {
  background:
    radial-gradient(circle at 38% 32%, rgba(255, 255, 255, 0.1), transparent 0.9rem),
    #151a25;
  box-shadow: 0 0 0 10px rgba(184, 151, 255, 0.14);
}

.action-strip {
  display: flex;
  gap: 10px;
  align-items: center;
}

.primary-action,
.ghost-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 900;
  transition:
    transform 150ms ease,
    filter 150ms ease,
    background 150ms ease;
}

.primary-action {
  flex: 1 1 auto;
  padding: 0 22px;
  background: linear-gradient(135deg, var(--ready), var(--ready-2));
  color: #03100e;
  box-shadow: 0 18px 40px rgba(40, 245, 155, 0.2);
}

.ghost-action {
  flex: 0 0 auto;
  padding: 0 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
  color: var(--ink);
}

.primary-action:hover,
.ghost-action:hover,
.primary-action:focus-visible,
.ghost-action:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.06);
  outline: none;
}

.primary-action:disabled {
  cursor: not-allowed;
  filter: grayscale(0.65) brightness(0.82);
  opacity: 0.72;
  transform: none;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 960px) {
  h1 {
    font-size: 2.4rem;
  }

  .reaction-pad {
    min-height: 480px;
  }

  .pad-title {
    font-size: 3.4rem;
  }
}

@media (max-width: 680px) {
  .app-shell {
    width: min(100% - 20px, 920px);
    padding: 10px 0;
  }

  .masthead {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px;
  }

  h1 {
    font-size: 2rem;
  }

  .mini-stats {
    gap: 8px;
    padding: 10px;
  }

  .reaction-pad {
    min-height: 390px;
  }

  .pad-core {
    width: min(72vw, 300px);
    padding: 26px;
  }

  .pad-title {
    font-size: 2.5rem;
  }

  .action-strip {
    flex-direction: column;
  }

  .primary-action,
  .ghost-action {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}