:root {
  --color-paper: #f4f1e8;
  --color-paper-deep: #ece7d9;
  --color-ink: #1c1b18;
  --color-ink-soft: #6b665b;
  --color-line: #d9d3c3;
  --color-accent: #d8442a;
  --color-accent-deep: #b0331d;
  --color-mark: #e0a92e;
  --font-display: Inter, Noto Sans TC, sans-serif;
  --font-body: Inter, Noto Sans TC, sans-serif;
  --font-mono: Inter, Noto Sans TC, sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

.tool-intro {
  max-width: 64ch;
  margin-block: 24px 40px;
  color: #6b665b;
}

.amount-layout {
  display: flex;
  flex-direction: column;
  gap: 40px;
  max-width: 720px;
}

.amount-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.amount-field-label {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #6b665b;
}

.amount-input-wrap {
  display: flex;
  align-items: stretch;
  border: 1.5px solid #1c1b18;
  border-radius: 2px;
  background: #f4f1e8;
  box-shadow: 6px 6px 0 rgba(28, 27, 24, 0.12);
  transition: border-color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.amount-input-wrap:focus-within {
  border-color: #d8442a;
}

.amount-currency {
  display: grid;
  place-items: center;
  padding-inline: 24px;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1.75rem;
  font-weight: 600;
  color: #6b665b;
  border-right: 1px solid #d9d3c3;
}

.amount-input {
  flex: 1;
  min-width: 0;
  padding: 16px 24px;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 2.75rem;
  font-weight: 600;
  line-height: 1.1;
  color: #1c1b18;
  background: transparent;
  border: 0;
  font-variant-numeric: tabular-nums;
}
.amount-input::placeholder {
  font-weight: 400;
  color: #6b665b;
}
.amount-input:focus {
  outline: none;
}

.amount-error {
  min-height: 1.4em;
  margin: 0;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  color: #d8442a;
}

.amount-input-wrap.is-invalid {
  border-color: #d8442a;
  box-shadow: 6px 6px 0 color-mix(in srgb, #d8442a 18%, transparent);
}

.result-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: #ece7d9;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
}

.result-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.result-label {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #6b665b;
}

.result-copy {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: #6b665b;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  transition: color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.result-copy:hover {
  color: #d8442a;
}
.result-copy:focus-visible {
  outline: 2px solid #d8442a;
  outline-offset: 2px;
}

.result-value {
  margin: 0;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1.25rem;
  line-height: 1.5;
  color: #1c1b18;
  word-break: break-word;
}

.result-value.is-empty {
  color: #6b665b;
}

.result-value-num {
  font-variant-numeric: tabular-nums;
}

.result-value-cn {
  letter-spacing: 0.04em;
}

.result-value-en {
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.copy-hint {
  min-height: 1.4em;
  margin: 0;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  color: #d8442a;
}

@media (max-width: 600px) {
  .amount-input {
    font-size: 1.75rem;
  }
  .amount-currency {
    font-size: 1.25rem;
    padding-inline: 16px;
  }
}