.change-calculator {
  --cc-accent: #0f766e;
  --cc-accent-dark: #0b5f59;
  --cc-accent-soft: #e6f4f1;
  --cc-text: #1f2933;
  --cc-muted: #637083;
  --cc-line: #d9dee7;
  --cc-panel: #ffffff;
  --cc-up: #087f5b;
  --cc-up-soft: #ecfdf5;
  --cc-down: #c2413b;
  --cc-down-soft: #fff1f0;
  position: fixed;
  z-index: 1000;
  right: max(22px, env(safe-area-inset-right));
  bottom: max(22px, env(safe-area-inset-bottom));
  color: var(--cc-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

.change-calculator *,
.change-calculator *::before,
.change-calculator *::after {
  box-sizing: border-box;
}

.change-calculator__trigger {
  position: relative;
  display: grid;
  width: 56px;
  height: 56px;
  margin-left: auto;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .38);
  border-radius: 50%;
  background: linear-gradient(145deg, #159487, var(--cc-accent-dark));
  box-shadow: 0 12px 28px rgba(15, 118, 110, .3), inset 0 1px 0 rgba(255, 255, 255, .28);
  color: #fff;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease;
}

.change-calculator__trigger::before {
  content: "";
  position: absolute;
  inset: -5px;
  z-index: -1;
  border-radius: inherit;
  background: rgba(15, 118, 110, .11);
}

.change-calculator__trigger:hover {
  border-color: rgba(255, 255, 255, .55);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(15, 118, 110, .36), inset 0 1px 0 rgba(255, 255, 255, .3);
}

.change-calculator__trigger:focus-visible,
.change-calculator__close:focus-visible,
.change-calculator__clear:focus-visible,
.change-calculator__history-button:focus-visible {
  outline: 3px solid rgba(15, 118, 110, .22);
  outline-offset: 3px;
}

.change-calculator__trigger-mark {
  font-size: 23px;
  font-weight: 780;
  line-height: 1;
  letter-spacing: -.04em;
}

.change-calculator__panel {
  position: absolute;
  right: 0;
  bottom: 70px;
  width: min(372px, calc(100vw - 32px));
  max-height: min(690px, calc(100vh - 112px));
  overflow: auto;
  border: 1px solid rgba(190, 203, 214, .78);
  border-radius: 18px;
  background: rgba(255, 255, 255, .98);
  box-shadow: 0 24px 70px rgba(31, 41, 51, .2), 0 3px 12px rgba(31, 41, 51, .08);
  opacity: 0;
  overscroll-behavior: contain;
  pointer-events: none;
  transform: translateY(12px) scale(.975);
  transform-origin: right bottom;
  visibility: hidden;
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
}

.change-calculator[data-open="true"] .change-calculator__panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
  visibility: visible;
}

.change-calculator__header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 20px 16px;
  border-bottom: 1px solid #edf0f3;
  background: linear-gradient(145deg, #f5fbfa, #fff 65%);
}

.change-calculator__eyebrow {
  display: block;
  margin-bottom: 4px;
  color: var(--cc-accent);
  font-size: 10px;
  font-weight: 780;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.change-calculator__title {
  margin: 0;
  color: var(--cc-text);
  font-size: 19px;
  line-height: 1.25;
}

.change-calculator__subtitle {
  margin: 5px 0 0;
  color: var(--cc-muted);
  font-size: 12px;
  line-height: 1.5;
}

.change-calculator__close {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: #7a8797;
  font-size: 24px;
  font-weight: 350;
  line-height: 30px;
  cursor: pointer;
}

.change-calculator__close:hover {
  border-color: transparent;
  background: #eef4f3;
  color: var(--cc-accent-dark);
}

.change-calculator__body {
  padding: 18px 20px 20px;
}

.change-calculator__fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 11px;
}

.change-calculator__field {
  min-width: 0;
}

.change-calculator__field label {
  display: block;
  margin: 0 0 7px;
  color: var(--cc-muted);
  font-size: 12px;
  font-weight: 700;
}

.change-calculator__field input {
  width: 100%;
  height: 44px;
  margin: 0;
  padding: 0 11px;
  border: 1px solid var(--cc-line);
  border-radius: 8px;
  background: #fff;
  color: var(--cc-text);
  font: inherit;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}

.change-calculator__field input:focus {
  border-color: var(--cc-accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, .12);
}

.change-calculator__submit {
  width: 100%;
  height: 43px;
  margin-top: 13px;
  padding: 0 16px;
  border: 1px solid var(--cc-accent);
  border-radius: 8px;
  background: var(--cc-accent);
  box-shadow: 0 5px 14px rgba(15, 118, 110, .18);
  color: #fff;
  font-size: 14px;
  font-weight: 720;
  cursor: pointer;
  transition: background .15s ease, transform .15s ease, box-shadow .15s ease;
}

.change-calculator__submit:hover {
  border-color: var(--cc-accent-dark);
  background: var(--cc-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 7px 18px rgba(15, 118, 110, .24);
}

.change-calculator__result {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 14px;
  align-items: center;
  margin-top: 14px;
  padding: 13px 14px;
  border: 1px solid #e3e8ed;
  border-radius: 10px;
  background: #f7f9fb;
}

.change-calculator__result[hidden] {
  display: none;
}

.change-calculator__result-label {
  color: var(--cc-muted);
  font-size: 11px;
  font-weight: 700;
}

.change-calculator__result-value {
  grid-row: 1 / 3;
  grid-column: 2;
  color: var(--cc-text);
  font-size: 21px;
  font-weight: 780;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}

.change-calculator__result-detail {
  color: var(--cc-muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.change-calculator__result--up {
  border-color: #bfe8d5;
  background: var(--cc-up-soft);
}

.change-calculator__result--up .change-calculator__result-value {
  color: var(--cc-up);
}

.change-calculator__result--down,
.change-calculator__result--error {
  border-color: #f1cfcb;
  background: var(--cc-down-soft);
}

.change-calculator__result--down .change-calculator__result-value,
.change-calculator__result--error .change-calculator__result-value {
  color: var(--cc-down);
}

.change-calculator__result--error .change-calculator__result-value {
  grid-row: auto;
  font-size: 13px;
}

.change-calculator__history {
  margin-top: 18px;
  padding: 14px;
  border: 1px solid #e3e8ed;
  border-radius: 11px;
  background: #fbfcfd;
}

.change-calculator__history-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 10px;
  padding: 0 3px;
}

.change-calculator__history-title {
  margin: 0;
  color: var(--cc-text);
  font-size: 13px;
  font-weight: 750;
}

.change-calculator__clear {
  width: auto;
  height: auto;
  padding: 3px 0;
  border: 0;
  background: transparent;
  color: var(--cc-muted);
  font-size: 11px;
  cursor: pointer;
}

.change-calculator__clear:hover {
  border-color: transparent;
  color: var(--cc-accent);
}

.change-calculator__clear[hidden] {
  display: none;
}

.change-calculator__history-list {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.change-calculator__history-button {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 12px;
  align-items: center;
  width: 100%;
  height: auto;
  min-height: 48px;
  margin: 0;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: #f4f7f9;
  color: var(--cc-text);
  text-align: left;
  cursor: pointer;
}

.change-calculator__history-button:hover {
  border-color: #c8dcd8;
  background: #f4faf8;
  color: var(--cc-text);
}

.change-calculator__history-values {
  min-width: 0;
  overflow: hidden;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.change-calculator__history-hint {
  grid-column: 1;
  color: var(--cc-muted);
  font-size: 10px;
}

.change-calculator__history-rate {
  grid-column: 2;
  grid-row: 1 / 3;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
}

.change-calculator__history-rate--up {
  color: var(--cc-up);
}

.change-calculator__history-rate--down {
  color: var(--cc-down);
}

.change-calculator__empty {
  margin: 0;
  padding: 14px 10px;
  border-radius: 8px;
  background: #f8fafb;
  color: #8a96a5;
  font-size: 11px;
  line-height: 1.5;
  text-align: center;
}

.change-calculator__backdrop {
  display: none;
}

@media (max-width: 620px) {
  body.change-calculator-open {
    overflow: hidden;
  }

  .change-calculator {
    right: max(16px, env(safe-area-inset-right));
    bottom: max(16px, env(safe-area-inset-bottom));
  }

  .change-calculator__trigger {
    width: 54px;
    height: 54px;
  }

  .change-calculator__panel {
    position: fixed;
    z-index: 2;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    max-height: calc(100dvh - 36px);
    border: 0;
    border-radius: 20px 20px 0 0;
    padding-bottom: env(safe-area-inset-bottom);
    transform: translateY(24px);
    transform-origin: center bottom;
  }

  .change-calculator[data-open="true"] .change-calculator__panel {
    transform: translateY(0);
  }

  .change-calculator__panel::before {
    content: "";
    display: block;
    width: 38px;
    height: 4px;
    margin: 9px auto 0;
    border-radius: 999px;
    background: #d8dee5;
  }

  .change-calculator__header {
    padding-top: 13px;
  }

  .change-calculator__backdrop {
    position: fixed;
    z-index: 1;
    inset: 0;
    display: block;
    background: rgba(17, 24, 39, .44);
    opacity: 0;
    pointer-events: none;
    transition: opacity .18s ease;
  }

  .change-calculator[data-open="true"] .change-calculator__backdrop {
    opacity: 1;
    pointer-events: auto;
  }
}

@media (max-width: 380px) {
  .change-calculator__fields {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .change-calculator__trigger,
  .change-calculator__panel,
  .change-calculator__backdrop,
  .change-calculator__submit {
    transition: none;
  }
}