.reaction-page {
  --reaction-wait-bg: #1d4ed8;
  --reaction-wait-border: #1e3a8a;
  --reaction-wait-ink: #ffffff;
  --reaction-ready-bg: #e60012;
  --reaction-ready-border: #b0000e;
  --reaction-ready-ink: #ffffff;
  --reaction-error-bg: #fbe4dc;
  --reaction-error-border: #b23a24;
  --reaction-error-ink: #7a2415;
  --reaction-result-bg: #dcefe2;
  --reaction-result-border: #2f7a50;
  --reaction-result-ink: #17502f;
}

:root[data-theme="dark"] .reaction-page {
  --reaction-wait-bg: #38bdf8;
  --reaction-wait-border: #7dd3fc;
  --reaction-wait-ink: #071a24;
  --reaction-ready-bg: #e60012;
  --reaction-ready-border: #9d000c;
  --reaction-ready-ink: #ffffff;
  --reaction-error-bg: #4c2119;
  --reaction-error-border: #f07b5d;
  --reaction-error-ink: #ffd0c3;
  --reaction-result-bg: #183b29;
  --reaction-result-border: #52c98a;
  --reaction-result-ink: #b8f2ce;
}

.reaction-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.reaction-instrument {
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}

.reaction-instrument__intro {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.reaction-instrument__intro h2 {
  margin: 0;
  font-size: 2.4rem;
  line-height: 1.45;
}

.reaction-instrument__intro p {
  margin: 0;
  color: var(--ink-2);
  font-size: 1.5rem;
  line-height: 1.7;
  text-align: right;
}

.reaction-pad {
  position: relative;
  isolation: isolate;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 12px;
  width: 100%;
  min-height: 380px;
  padding: 40px 24px;
  overflow: hidden;
  border: 1px solid var(--line-2);
  border-radius: 16px;
  background: var(--paper-sunk);
  color: var(--ink);
  text-align: center;
  cursor: pointer;
  transition: none;
}

.reaction-pad::before {
  content: "";
  position: absolute;
  inset: 14px;
  z-index: -1;
  border: 1px solid currentColor;
  border-radius: 12px;
  opacity: 0.18;
  pointer-events: none;
}

.reaction-pad[data-state="waiting"] {
  border-color: var(--reaction-wait-border);
  background: var(--reaction-wait-bg);
  color: var(--reaction-wait-ink);
}

.reaction-pad[data-state="ready"] {
  border-color: var(--reaction-ready-border);
  background: var(--reaction-ready-bg);
  color: var(--reaction-ready-ink);
}

.reaction-pad[data-state="too-soon"] {
  border-color: var(--reaction-error-border);
  background: var(--reaction-error-bg);
  color: var(--reaction-error-ink);
}

.reaction-pad[data-state="result"] {
  border-color: var(--reaction-result-border);
  background: var(--reaction-result-bg);
  color: var(--reaction-result-ink);
}

.reaction-pad:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 4px;
}

.reaction-pad__label {
  font-size: 1.6rem;
  line-height: 1.5;
}

.reaction-pad__metric {
  max-width: 100%;
  font-size: clamp(4rem, 7vw, 6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  text-wrap: balance;
}

.reaction-pad__hint {
  font-size: 1.5rem;
  line-height: 1.6;
  opacity: 0.78;
}

.reaction-live {
  min-height: 32px;
  margin: 16px 0 0;
  color: var(--ink-2);
  font-size: 1.5rem;
  line-height: 1.7;
}

.reaction-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 24px;
  margin: 18px 0 0;
  border-top: 1px solid var(--line);
}

.reaction-stats div {
  padding-top: 16px;
}

.reaction-stats dt {
  color: var(--ink-3);
  font-size: 1.4rem;
}

.reaction-stats dd {
  margin: 4px 0 0;
  color: var(--ink);
  font-size: 2.4rem;
  font-variant-numeric: tabular-nums;
}

.reaction-ledger {
  padding: 24px;
  border-radius: 16px;
  background: var(--paper-sunk);
}

.reaction-ledger__heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.reaction-ledger__heading h2 {
  margin: 0;
  font-size: 2.4rem;
  line-height: 1.45;
}

.reaction-ledger__heading span {
  color: var(--ink-3);
  font-size: 1.4rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.reaction-ledger__hint,
.reaction-empty {
  margin: 10px 0 0;
  color: var(--ink-2);
  font-size: 1.4rem;
  line-height: 1.75;
}

.reaction-ranking {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: reaction-rank;
}

.reaction-ranking li {
  counter-increment: reaction-rank;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.reaction-ranking li::before {
  content: counter(reaction-rank, decimal-leading-zero);
  color: var(--ink-3);
  font-size: 1.3rem;
  font-variant-numeric: tabular-nums;
}

.reaction-ranking li:nth-child(-n + 3)::before {
  color: var(--brass);
}

.reaction-entry__time {
  color: var(--ink);
  font-size: 1.85rem;
  font-variant-numeric: tabular-nums;
}

.reaction-ranking time {
  color: var(--ink-3);
  font-size: 1.25rem;
  white-space: nowrap;
}

.reaction-ranking li.is-latest .reaction-entry__time {
  color: var(--green-ink);
}

.reaction-empty[hidden] {
  display: none;
}

.reaction-clear {
  width: 100%;
  min-height: 44px;
  margin-top: 18px;
  padding: 10px 14px;
  border: 1px solid var(--line-2);
  border-radius: 8px;
  background: transparent;
  color: var(--ink-2);
  font-size: 1.4rem;
  cursor: pointer;
}

.reaction-clear:disabled {
  color: var(--ink-3);
  cursor: not-allowed;
  opacity: 0.58;
}

.reaction-rules {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.reaction-rules summary {
  display: flex;
  align-items: center;
  min-height: 48px;
  color: var(--ink-2);
  font-size: 1.5rem;
  cursor: pointer;
}

.reaction-rules ul {
  max-width: 72ch;
  margin: 0;
  padding-left: 1.4em;
  color: var(--ink-2);
  font-size: 1.5rem;
  line-height: 1.85;
}

.reaction-noscript {
  color: var(--orange-ink);
  font-size: 1.5rem;
}

@media (hover: hover) and (pointer: fine) {
  .reaction-pad[data-state="idle"]:hover,
  .reaction-pad[data-state="result"]:hover,
  .reaction-pad[data-state="too-soon"]:hover {
    border-color: var(--reaction-result-border);
    background: var(--reaction-result-bg);
    color: var(--reaction-result-ink);
  }

  .reaction-clear:not(:disabled):hover {
    border-color: var(--green);
    color: var(--ink);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .reaction-pad[data-state="ready"] {
    animation: reaction-signal 260ms cubic-bezier(0.16, 1, 0.3, 1);
  }

  @keyframes reaction-signal {
    from { transform: scale(0.985); }
    to { transform: scale(1); }
  }
}

@media (max-width: 980px) {
  .reaction-pad {
    min-height: 340px;
  }
}

@media (max-width: 540px) {
  .reaction-instrument,
  .reaction-ledger {
    padding: 18px;
  }

  .reaction-instrument__intro {
    display: block;
  }

  .reaction-instrument__intro p {
    margin-top: 6px;
    text-align: left;
  }

  .reaction-pad {
    min-height: 300px;
    padding: 28px 18px;
  }

  .reaction-pad__metric {
    font-size: clamp(3.6rem, 14vw, 5rem);
  }

  .reaction-stats {
    gap: 0 16px;
  }

  .reaction-ranking li {
    grid-template-columns: 1.8rem minmax(0, 1fr) auto;
  }
}