/* ==========================================================================
   QuickPharm — design tokens
   A pharmacist's measuring instrument, not a consumer wellness app:
   cool paper, deep apothecary teal, tabular numerals for the one number
   that matters — now with softer geometry and a bit more life in the motion.
   ========================================================================== */

:root {
  --paper: #F1F3EF;
  --paper-dim: #E6E8E0;
  --paper-line: #D8DBD2;
  --ink: #10201C;
  --ink-soft: rgba(16, 32, 28, 0.62);
  --ink-faint: rgba(16, 32, 28, 0.38);
  --accent: #1F6F5C;
  --accent-ink: #0E3A30;
  --accent-soft: rgba(31, 111, 92, 0.10);
  --accent-line: rgba(31, 111, 92, 0.35);
  --amber: #B9781F;
  --amber-soft: rgba(185, 120, 31, 0.12);
  --brick: #A8402B;
  --brick-soft: rgba(168, 64, 43, 0.10);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --font-ui: "Vazirmatn", "Segoe UI", Tahoma, sans-serif;
  --font-num: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }


html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--paper-dim);
  color: var(--ink);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior-y: none;
}

button, input {
  font-family: inherit;
  color: inherit;
}

button { transition: transform 140ms var(--ease), background-color 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease); }
button:active { transform: scale(0.95); }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes popIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------------------------------------------------------------- shell */

.app-shell {
  max-width: 560px;
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  position: relative;
}

/* ---------------------------------------------------------------- topbar */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px 16px;
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  transition: box-shadow 220ms var(--ease), border-color 220ms var(--ease);
  border-bottom: 1px solid transparent;
}

.topbar.is-scrolled {
  box-shadow: 0 8px 20px -14px rgba(16, 32, 28, 0.35);
  border-bottom-color: var(--paper-line);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mark {
  width: 34px;
  height: 34px;
  flex: none;
  object-fit: contain;
  filter: drop-shadow(0 1px 0 rgba(16,32,28,0.05));
}

.wordmark-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand {
  font-family: var(--font-num);
  font-weight: 600;
  font-size: 17.5px;
  letter-spacing: 0.2px;
  color: var(--ink);
}

.tagline {
  font-size: 12.5px;
  color: var(--ink-soft);
  margin-top: 2px;
}

.settings-icon-btn {
  border: none;
  background: var(--paper-dim);
  color: var(--ink-soft);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex: none;
}
.settings-icon-btn svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.settings-icon-btn:active { transform: scale(0.9) rotate(20deg); }

/* ---------------------------------------------------------------- views */

.views {
  flex: 1;
  padding: 4px 20px 120px;
}

.view[hidden] { display: none; }
.view { animation: viewIn 260ms var(--ease); }

/* --------------------------------------------------------------- search */

.field-label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--paper-dim);
  border-radius: var(--radius-lg);
  padding: 4px 6px 4px 16px;
  border: 1.5px solid transparent;
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}
.search-input-wrap:focus-within {
  border-color: var(--accent-line);
  background: var(--paper);
}

.search-icon {
  flex: none;
  width: 19px;
  height: 19px;
  fill: none;
  stroke: var(--ink-faint);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

#drugSearch, #compoundSearch {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 17px;
  padding: 12px 2px;
  outline: none;
  color: var(--ink);
  min-width: 0;
}
#drugSearch::placeholder, #compoundSearch::placeholder { color: var(--ink-faint); }

.clear-btn {
  flex: none;
  border: none;
  background: var(--paper-line);
  color: var(--ink-soft);
  cursor: pointer;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.clear-btn svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; }

.results-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.results-list li {
  animation: rise 320ms var(--ease) backwards;
  margin-bottom: 8px;
}
.results-list li:last-child { margin-bottom: 0; }
.results-list li:nth-child(1) { animation-delay: 0ms; }
.results-list li:nth-child(2) { animation-delay: 25ms; }
.results-list li:nth-child(3) { animation-delay: 50ms; }
.results-list li:nth-child(4) { animation-delay: 75ms; }
.results-list li:nth-child(5) { animation-delay: 100ms; }
.results-list li:nth-child(n+6) { animation-delay: 120ms; }

.result-item {
  display: block;
  width: 100%;
  text-align: right;
  background: var(--paper-dim);
  border: 1.5px solid var(--paper-line);
  border-radius: var(--radius-md);
  padding: 13px 14px;
  cursor: pointer;
  transition: background-color 160ms var(--ease), border-color 160ms var(--ease);
}
.result-item:hover { background: var(--paper); border-color: var(--accent-line); }
.result-item:active { background: var(--accent-soft); border-color: var(--accent-line); transform: scale(0.98); }

.result-item .r-name {
  font-size: 15.5px;
  font-weight: 500;
  color: var(--ink);
}
.result-item .r-meta {
  display: block;
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--ink-soft);
}
.result-item .r-meta .r-strength {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
}

.empty-hint {
  font-size: 13.5px;
  color: var(--ink-soft);
  padding: 18px 14px;
  margin: 8px 0 0;
  background: var(--paper-dim);
  border-radius: var(--radius-md);
  text-align: center;
}

/* ------------------------------------------------------------ drug card */

.selected-panel {
  margin-top: 22px;
  animation: rise 320ms var(--ease);
}

.drug-card {
  position: relative;
  background: var(--paper-dim);
  border-radius: var(--radius-lg);
  padding: 20px 22px 22px;
}

.reset-drug {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  border: none;
  background: var(--paper);
  color: var(--ink-soft);
  cursor: pointer;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: 0 1px 3px rgba(16,32,28,0.08);
}
.reset-drug:active { transform: scale(0.88) rotate(-20deg); }
.reset-drug svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.drug-form {
  display: inline-block;
  font-size: 11.5px;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 4px 12px;
  margin: 0 0 10px;
}

.drug-name {
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 4px;
  line-height: 1.3;
  padding-left: 34px;
}

.drug-strength {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

/* -------------------------------------------------------------- chips */

.indication-row {
  margin-top: 20px;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  border: 1.5px solid var(--paper-line);
  background: var(--paper);
  border-radius: 999px;
  padding: 8px 15px;
  font-size: 13.5px;
  color: var(--ink);
  cursor: pointer;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease), color 160ms var(--ease);
}
.chip.is-active {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--paper);
  font-weight: 500;
}
.chip:active { transform: scale(0.94); }

/* ------------------------------------------------------------- measure */

.measure-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 14px;
  margin-top: 22px;
}

.measure-input-wrap {
  display: flex;
  align-items: baseline;
  background: var(--paper-dim);
  border-radius: var(--radius-md);
  padding: 4px 14px;
  gap: 6px;
  border: 1.5px solid transparent;
  transition: border-color 180ms var(--ease);
}
.measure-input-wrap:focus-within { border-color: var(--accent-line); }

.measure-input-wrap input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 23px;
  padding: 10px 2px;
  outline: none;
  width: 100%;
}

.measure-input-wrap .unit {
  font-size: 12.5px;
  color: var(--ink-soft);
  padding-bottom: 2px;
}

.age-input-wrap {
  display: flex;
  gap: 10px;
}
.measure-input-wrap.small input { font-size: 19px; }

/* --------------------------------------------------------- weight estimate */

.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.field-label-row .field-label { margin-bottom: 0; }

.estimate-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  border: 1.5px solid var(--paper-line);
  background: var(--paper);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 5px 11px 5px 9px;
  font-size: 11.5px;
  cursor: pointer;
}
.estimate-toggle svg {
  width: 13px;
  height: 13px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.estimate-toggle.is-active {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--paper);
}
.estimate-toggle:active { transform: scale(0.94); }

.measure-input-wrap.is-estimated {
  border-color: var(--accent-line);
  background: var(--accent-soft);
}
.measure-input-wrap.is-estimated input {
  color: var(--accent-ink);
  font-weight: 600;
}

.estimate-hint {
  margin: 10px 2px 0;
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.6;
  animation: rise 220ms var(--ease);
}

/* -------------------------------------------------------------- result */

.result-block {
  margin-top: 26px;
  animation: rise 320ms var(--ease);
}

.result-rule {
  height: 1.5px;
  background: var(--ink);
  margin-bottom: 18px;
  transform-origin: right;
  animation: growLine 420ms var(--ease);
}
@keyframes growLine {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.result-headline {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.result-value {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 46px;
  font-weight: 600;
  color: var(--accent-ink);
  letter-spacing: -0.5px;
  animation: popIn 320ms var(--ease);
}

.result-unit {
  font-size: 16px;
  color: var(--ink-soft);
}

.result-sub {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

.result-text {
  font-size: 16px;
  line-height: 1.75;
  white-space: pre-line;
}

.result-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 14px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--paper-line);
}

.fact {
  min-width: 100px;
  background: var(--paper-dim);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}
.fact .fact-label {
  display: block;
  font-size: 11.5px;
  color: var(--ink-soft);
  margin-bottom: 3px;
}
.fact .fact-value {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
}

.flag {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  font-size: 13.5px;
  line-height: 1.6;
  margin-top: 14px;
  animation: rise 280ms var(--ease);
}
.flag.amber { background: var(--amber-soft); color: #7A4E14; }
.flag.brick { background: var(--brick-soft); color: #7A2E1D; }
.flag .flag-dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  margin-top: 6px;
  background: currentColor;
}

.note-block {
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--paper-dim);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.7;
  white-space: pre-line;
}

.prompt-hint {
  margin-top: 22px;
  font-size: 13.5px;
  color: var(--ink-faint);
  text-align: center;
}

/* ------------------------------------------------------- compound list */

.category-filter {
  margin: 16px 0 4px;
}

.compound-list {
  margin-top: 14px;
}

.compound-list .result-item {
  display: flex;
  align-items: center;
  gap: 13px;
}

.compound-list .result-icon {
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 2px rgba(16,32,28,0.06);
}
.compound-list .result-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: var(--accent-ink);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.compound-list .result-icon .wave { fill: var(--accent-ink); stroke: none; opacity: 0.5; }
.compound-list .result-icon .tick { stroke: var(--accent-ink); }

.compound-list .result-text { flex: 1; min-width: 0; }

.category-tag {
  display: inline-block;
  font-size: 11px;
  color: var(--accent-ink);
  background: var(--paper);
  border-radius: 999px;
  padding: 3px 10px;
  margin-inline-start: 6px;
}

/* ------------------------------------------------------ compound detail */

.compound-detail {
  position: relative;
  margin-top: 8px;
  animation: rise 320ms var(--ease);
}

.compound-hero {
  position: relative;
  text-align: center;
  padding: 8px 20px 26px;
}

.compound-icon {
  width: 68px;
  height: 68px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: popIn 340ms var(--ease);
}
.compound-icon svg {
  width: 36px;
  height: 36px;
  fill: none;
  stroke: var(--accent-ink);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.compound-icon .wave { fill: var(--accent-ink); stroke: none; opacity: 0.5; }
.compound-icon .tick { stroke: var(--accent-ink); }

.compound-form {
  display: inline-block;
  font-size: 11.5px;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 10px;
}

.compound-name {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 4px;
}

.compound-name-en {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
  direction: ltr;
}

.doc-section {
  padding: 20px 4px;
  border-top: 1px solid var(--paper-line);
}

.doc-section h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-ink);
  margin: 0 0 12px;
}

.doc-list {
  margin: 0;
  padding-inline-start: 20px;
  font-size: 14.5px;
  line-height: 1.9;
}

.doc-text {
  font-size: 14.5px;
  line-height: 1.85;
  margin: 0;
  white-space: pre-line;
}

.ingredients-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--paper-dim);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.ingredients-table tr {
  border-bottom: 1px solid var(--paper-line);
}
.ingredients-table tr:last-child { border-bottom: none; }
.ingredients-table td {
  padding: 11px 14px;
  vertical-align: baseline;
}
.ingredients-table td.ing-name {
  width: 60%;
}
.ingredients-table td.ing-amount {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  text-align: left;
  color: var(--accent-ink);
  font-weight: 600;
  white-space: nowrap;
}
.ingredients-table td.ing-unit {
  font-size: 12.5px;
  color: var(--ink-soft);
  text-align: left;
  white-space: nowrap;
}

.method-list {
  margin: 0;
  padding-inline-start: 22px;
  font-size: 14.5px;
  line-height: 2;
}
.method-list li { margin-bottom: 6px; }
.method-list li::marker {
  font-family: var(--font-num);
  color: var(--accent-ink);
  font-weight: 600;
}

.reference-note {
  margin: 20px 4px 4px;
  font-size: 12px;
  color: var(--ink-faint);
  line-height: 1.7;
  padding-top: 16px;
  border-top: 1px dashed var(--paper-line);
}

/* -------------------------------------------------------------- settings */

.settings-content { animation: rise 320ms var(--ease); }

.app-id-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--paper-dim);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  margin-bottom: 14px;
}
.app-id-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  flex: none;
}
.app-id-name {
  font-family: var(--font-num);
  font-weight: 600;
  font-size: 18px;
  margin: 0 0 2px;
}
.app-id-version {
  font-size: 12.5px;
  color: var(--ink-soft);
  margin: 0;
}

.settings-action {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  border: 1.5px solid var(--paper-line);
  background: var(--paper);
  border-radius: var(--radius-md);
  padding: 15px 18px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  margin-bottom: 10px;
}
.settings-action svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}
.settings-action.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
}
.settings-action:active { transform: scale(0.98); }

.settings-section { border-top: none; margin-top: 8px; background: var(--paper-dim); border-radius: var(--radius-lg); padding: 20px 20px; }

.feature-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.feature-dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 7px;
}

.dev-card {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.dev-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.dev-avatar svg { width: 22px; height: 22px; fill: none; stroke: var(--accent-ink); stroke-width: 1.8; }
.dev-name { font-weight: 600; font-size: 15px; margin: 0 0 2px; }
.dev-role { font-size: 12.5px; color: var(--ink-soft); margin: 0; }

.settings-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--accent-ink);
  text-decoration: none;
  background: var(--paper);
  border-radius: 999px;
  padding: 9px 15px;
  width: fit-content;
}
.settings-link svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2; }
.settings-link:active { transform: scale(0.96); }

.settings-footer {
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-faint);
  margin: 22px 0 8px;
  line-height: 1.7;
}

/* -------------------------------------------------------------- bottom nav */

.bottom-nav {
  display: flex;
  gap: 4px;
  background: rgba(241, 243, 239, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--paper-line);
  border-radius: 999px;
  box-shadow: 0 10px 28px -12px rgba(16, 32, 28, 0.28);
  position: fixed;
  bottom: calc(16px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 460px;
  padding: 6px;
  z-index: 30;
}

.nav-btn {
  flex: 1;
  border: none;
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 9px 4px;
  font-size: 10.5px;
  color: var(--ink-faint);
  cursor: pointer;
  position: relative;
  border-radius: 999px;
  transition: color 200ms var(--ease);
}

.nav-icon-wrap {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 260ms var(--ease), transform 260ms var(--ease);
}

.nav-btn svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 200ms var(--ease);
}
.nav-btn circle[r=".6"] { fill: currentColor; stroke: none; }

.nav-btn.is-active {
  color: var(--accent-ink);
  font-weight: 500;
}
.nav-btn.is-active .nav-icon-wrap {
  background: var(--accent-soft);
  transform: scale(1.06);
}
.nav-btn:active .nav-icon-wrap { transform: scale(0.88); }

/* -------------------------------------------------------------- toast */

.toast {
  position: fixed;
  bottom: calc(96px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  padding: 11px 20px;
  border-radius: 999px;
  z-index: 50;
  opacity: 0;
  transition: opacity 220ms var(--ease), transform 220ms var(--ease);
  pointer-events: none;
  white-space: nowrap;
}
.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* -------------------------------------------------------------- misc */

@media (max-width: 380px) {
  .result-value { font-size: 38px; }
  .measure-grid { grid-template-columns: 1fr 1fr; }
}