:root {
  --canvas: #f4f5f7;
  --paper: #ffffff;
  --ink: #17191d;
  --muted: #747983;
  --line: #e3e5e9;
  --soft: #f8f9fa;
  --focus: #2563eb;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.5;
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.masthead {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--muted);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
  letter-spacing: -0.035em;
}

.quiet-badge {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  padding: 6px 11px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
}

.query-card,
.recent-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.query-card {
  padding: 20px;
}

.query-copy h2 {
  font-size: 17px;
}

.query-copy p {
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
}

.query-form {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto auto;
  gap: 14px;
  align-items: end;
  margin-top: 18px;
}

.key-field,
.range-field {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.key-field > span:first-child,
.range-field legend {
  color: #4f545d;
  font-size: 12px;
  font-weight: 700;
}

.range-field {
  margin: 0;
  border: 0;
  padding: 0;
}

.input-wrap {
  position: relative;
  display: block;
}

.input-wrap input {
  width: 100%;
  height: 42px;
  border: 1px solid #cfd2d8;
  border-radius: 12px;
  background: var(--paper);
  padding: 0 62px 0 13px;
  outline: none;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 13px;
}

.input-wrap input:focus {
  border-color: var(--focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.13);
}

.reveal-btn {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  border: 0;
  border-radius: 8px;
  background: transparent;
  padding: 6px 8px;
  color: #555b65;
  cursor: pointer;
  font-size: 12px;
}

.range-group {
  display: flex;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 3px;
}

.range-btn {
  min-width: 54px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  padding: 0 11px;
  color: #555b65;
  cursor: pointer;
  font-size: 13px;
}

.range-btn.active {
  background: var(--ink);
  color: #fff;
  font-weight: 700;
}

.query-btn {
  height: 42px;
  border: 0;
  border-radius: 12px;
  background: var(--ink);
  padding: 0 22px;
  color: #fff;
  cursor: pointer;
  font-weight: 750;
}

.query-btn:disabled {
  cursor: wait;
  opacity: 0.58;
}

.privacy-line {
  margin-top: 12px;
  color: #8a8f98;
  font-size: 11px;
}

.alert {
  margin-top: 14px;
  border: 1px solid #f0c7c2;
  border-radius: 12px;
  background: #fff7f6;
  padding: 11px 13px;
  color: var(--danger);
  font-size: 13px;
}

.result {
  margin-top: 24px;
}

.receipt-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.receipt-item {
  display: grid;
  gap: 4px;
  min-width: 0;
  padding: 22px;
}

.receipt-item + .receipt-item {
  border-left: 1px solid var(--line);
}

.receipt-item span {
  color: var(--muted);
  font-size: 12px;
}

.receipt-item strong {
  overflow: hidden;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: clamp(25px, 4vw, 38px);
  line-height: 1.12;
  letter-spacing: -0.05em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

button:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.22);
  outline-offset: 2px;
}

@media (max-width: 820px) {
  .query-form {
    grid-template-columns: 1fr;
  }

  .query-btn {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 20px, 1240px);
    padding-top: 18px;
  }

  .masthead {
    align-items: center;
  }

  .query-card {
    padding: 15px;
  }

  .range-btn {
    flex: 1;
    min-width: 0;
    padding: 0 7px;
  }

  .receipt-grid {
    grid-template-columns: 1fr;
  }

  .receipt-item + .receipt-item {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .receipt-item {
    padding: 17px;
  }

  .receipt-item strong {
    font-size: 30px;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}