:root {
  color-scheme: light dark;
  --calc-bg: #0f1115;
  --calc-card: #181b22;
  --calc-border: rgba(255, 255, 255, 0.08);
  --calc-text: #eef1f6;
  --calc-muted: #a9b0bd;
  --calc-accent: #6aa9ff;
  --calc-accent-strong: #4b86f2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", sans-serif;
  background: var(--calc-bg);
  color: var(--calc-text);
  min-height: 100vh;
}

.page-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: calc(32px + var(--uni-top-offset, 0px)) 20px 80px;
}

.hero {
  margin-bottom: 24px;
}

.hero--compact {
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--calc-muted);
}

.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 40px);
}

.lede {
  margin: 0;
  max-width: 640px;
  color: var(--calc-muted);
}

.back-link {
  display: inline-flex;
  align-items: center;
  margin-bottom: 12px;
  color: var(--calc-accent);
  text-decoration: none;
  font-size: 14px;
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

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

.field__label {
  font-size: 13px;
  color: var(--calc-muted);
}

input,
select,
button,
textarea {
  font: inherit;
}

input[type="search"],
input[type="text"],
input[type="number"],
input[type="date"],
select {
  border-radius: 12px;
  border: 1px solid var(--calc-border);
  padding: 12px 14px;
  background: #0c0f14;
  color: var(--calc-text);
}

input:focus,
select:focus {
  outline: 2px solid rgba(106, 169, 255, 0.4);
  border-color: var(--calc-accent);
}

.tag-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-button {
  border: 1px solid var(--calc-border);
  background: transparent;
  color: var(--calc-muted);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
}

.tag-button.active {
  color: var(--calc-text);
  border-color: var(--calc-accent);
  background: rgba(106, 169, 255, 0.12);
}

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

.calc-card {
  border: 1px solid var(--calc-border);
  border-radius: 16px;
  padding: 18px;
  background: var(--calc-card);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.calc-card__title {
  font-size: 20px;
  margin: 0;
}

.calc-card__desc {
  margin: 0;
  color: var(--calc-muted);
}

.calc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.calc-tag {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--calc-muted);
}

.calc-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: var(--calc-card);
  border: 1px solid var(--calc-border);
  border-radius: 16px;
  padding: 18px;
}

.card__header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 14px;
}

.card__sub {
  margin: 0;
  color: var(--calc-muted);
  font-size: 14px;
}

.form-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-row label {
  font-size: 13px;
  color: var(--calc-muted);
}

.field-row input,
.field-row select {
  width: 100%;
}

.field-row small {
  color: var(--calc-muted);
}

.field-row.hidden {
  display: none;
}

.error-message {
  margin-top: 12px;
  color: #ffb0b0;
}

.result-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
}

.result-item span {
  color: var(--calc-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result-item strong {
  font-size: 18px;
}

.result-extra {
  margin-top: 12px;
  font-size: 14px;
  color: var(--calc-muted);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  font-size: 13px;
}

.result-table th,
.result-table td {
  text-align: left;
  padding: 6px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.result-table-wrap {
  overflow-x: auto;
}

.math-details summary {
  cursor: pointer;
  color: var(--calc-accent);
}

.math-details p {
  margin: 8px 0 0;
  color: var(--calc-muted);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  border: 1px solid var(--calc-border);
  background: transparent;
  color: var(--calc-text);
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
}

.button--primary {
  background: var(--calc-accent);
  border-color: var(--calc-accent);
  color: #0c0f14;
  font-weight: 600;
}

.export-note {
  margin-top: 12px;
  color: var(--calc-muted);
  font-size: 13px;
}

.disclaimer {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  color: var(--calc-muted);
  font-size: 13px;
}

@media (min-width: 720px) {
  .toolbar {
    flex-direction: row;
    align-items: flex-end;
  }

  .toolbar .field {
    flex: 1;
  }
}