:root {
  color-scheme: light dark;
  --bg: #f4f2ec;
  --surface: #fffdf8;
  --surface-2: #ebe8df;
  --text: #17211e;
  --muted: #61706a;
  --border: #d4d8d2;
  --brand: #163f35;
  --brand-strong: #0e3028;
  --brand-soft: #dfece5;
  --warning: #8d4f08;
  --warning-bg: #fff0d7;
  --danger: #982d2d;
  --danger-bg: #fae3e0;
  --ok: #216345;
  --radius: 0.5rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  font-synthesis: none;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101714;
    --surface: #18211e;
    --surface-2: #222d29;
    --text: #f2f4ef;
    --muted: #a7b2ad;
    --border: #34423d;
    --brand: #9bcbb6;
    --brand-strong: #bee1d1;
    --brand-soft: #233d34;
    --warning: #ffd18b;
    --warning-bg: #4b351a;
    --danger: #ffb4aa;
    --danger-bg: #4d2826;
    --ok: #9bd4b4;
  }
}

* {
  box-sizing: border-box;
}
html {
  background: var(--bg);
}
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background: var(--bg);
}
button,
input,
select {
  font: inherit;
}
button,
a,
input,
select {
  -webkit-tap-highlight-color: transparent;
}
a {
  color: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  left: var(--space-4);
  top: -4rem;
  z-index: 20;
  padding: var(--space-3);
  background: var(--surface);
}
.skip-link:focus {
  top: var(--space-4);
}

.shell {
  min-height: 100dvh;
  padding-bottom: calc(4.5rem + env(safe-area-inset-bottom));
}
.topbar {
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}
.brand {
  display: inline-flex;
  gap: var(--space-2);
  align-items: center;
  text-decoration: none;
  font-size: 1.125rem;
  font-weight: 760;
  letter-spacing: -0.02em;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  color: var(--surface);
  background: var(--brand);
  border-radius: 0.375rem;
  font-weight: 800;
}
.system-state {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--muted);
  font-size: 0.8125rem;
}
.session-actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.state-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--ok);
}

main {
  max-width: 76rem;
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) var(--space-8);
  outline: none;
}
.page-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.page-head h1 {
  margin: 0;
  font-size: clamp(1.6rem, 5vw, 2.25rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
}
.page-head p {
  margin: var(--space-2) 0 0;
  color: var(--muted);
}
.count {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  white-space: nowrap;
}

.bottom-nav {
  position: fixed;
  z-index: 10;
  bottom: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  min-height: 4.25rem;
  padding-bottom: env(safe-area-inset-bottom);
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.bottom-nav a {
  min-height: 4.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.125rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 1.25rem;
}
.bottom-nav small {
  font-size: 0.6875rem;
}
.bottom-nav a[aria-current="page"] {
  color: var(--brand);
  font-weight: 700;
}
.side-nav {
  display: none;
}

.filters {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.search-wrap {
  position: relative;
}
.search-wrap span {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  translate: 0 -50%;
  color: var(--muted);
}
input,
select {
  width: 100%;
  min-height: 2.875rem;
  padding: 0.625rem var(--space-3);
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.search-wrap input {
  padding-left: 2.25rem;
}
input:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--brand) 55%, transparent);
  outline-offset: 2px;
}

.stock-list,
.change-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
}
.stock-card,
.change-card {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
}
.stock-card:hover,
.stock-card:focus-visible,
.change-card[href]:hover {
  border-color: var(--brand);
}
.stock-main {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: start;
}
.stock-title {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.25;
}
.stock-amount {
  margin-top: var(--space-1);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.stock-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  color: var(--muted);
  font-size: 0.875rem;
}
.expiry {
  white-space: nowrap;
  font-weight: 700;
  font-size: 0.875rem;
}
.expiry.soon {
  color: var(--warning);
}
.expiry.overdue {
  color: var(--danger);
}
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.5rem;
  padding: 0 var(--space-2);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
}
.badge.warning {
  background: var(--warning-bg);
  color: var(--warning);
}
.badge.danger {
  background: var(--danger-bg);
  color: var(--danger);
}

.panel {
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.back {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  margin: calc(var(--space-2) * -1) 0 var(--space-3);
  color: var(--brand);
  font-weight: 700;
  text-decoration: none;
}
.facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3) var(--space-4);
  margin: 0;
}
.facts dt {
  color: var(--muted);
}
.facts dd {
  margin: 0;
  font-weight: 650;
}
.form {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}
.field {
  display: grid;
  gap: var(--space-2);
}
.field label {
  font-size: 0.875rem;
  font-weight: 700;
}
.button {
  min-height: 3rem;
  border: 0;
  border-radius: var(--radius);
  padding: 0 var(--space-4);
  background: var(--brand);
  color: #fff;
  font-weight: 750;
  cursor: pointer;
}
.button:hover {
  background: var(--brand-strong);
}
.button:disabled {
  opacity: 0.55;
  cursor: wait;
}
.button.secondary {
  color: var(--brand);
  background: var(--brand-soft);
}

.change-card {
  grid-template-columns: 2.25rem 1fr auto;
  align-items: start;
}
.change-icon {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--surface-2);
  font-weight: 800;
}
.change-card h2 {
  margin: 0;
  font-size: 1rem;
}
.change-card p {
  margin: var(--space-1) 0 0;
  color: var(--muted);
  font-size: 0.875rem;
}
.change-card time {
  color: var(--muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

.scan {
  max-width: 34rem;
  margin: 4vh auto 0;
  text-align: center;
}
.scan-symbol {
  width: 4rem;
  height: 4rem;
  margin: 0 auto var(--space-4);
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 2rem;
  font-weight: 800;
}
.scan h1 {
  margin: 0;
  font-size: 2rem;
}
.scan-result {
  margin: var(--space-5) 0;
  padding: var(--space-4);
  background: var(--brand-soft);
  border-radius: var(--radius);
  font-weight: 700;
}
.scan .button {
  width: 100%;
}

.master-grid {
  display: grid;
  gap: var(--space-4);
}
.master-card {
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.master-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 6.5rem;
  color: inherit;
  text-decoration: none;
}
.master-link:hover,
.master-link:focus-visible {
  border-color: var(--brand);
}
.master-link span:first-child {
  display: grid;
  gap: var(--space-1);
}
.master-link strong {
  font-size: 1.0625rem;
}
.master-link small,
.master-item small,
.hint,
.field small {
  color: var(--muted);
}
.master-editor {
  display: grid;
  gap: var(--space-6);
}
.master-editor > section > h2 {
  margin: 0 0 var(--space-3);
}
.master-form {
  margin: 0;
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.master-form > h2 {
  margin: 0;
  font-size: 1.125rem;
}
.master-list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.master-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.master-item > div:first-child {
  display: grid;
  gap: var(--space-1);
}
.inline-actions,
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.form-actions .button {
  flex: 1 1 9rem;
}
.text-button {
  min-height: 2.75rem;
  padding: 0 var(--space-2);
  border: 0;
  color: var(--brand);
  background: transparent;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.text-button.danger {
  color: var(--danger);
}
.field-label {
  font-size: 0.875rem;
  font-weight: 700;
}
.label-editor {
  display: grid;
  gap: var(--space-2);
}
.label-row {
  display: grid;
  grid-template-columns: minmax(8rem, 1fr) repeat(3, auto);
  align-items: center;
  gap: var(--space-1);
}
.form-error {
  margin: 0;
  padding: var(--space-3);
  border-radius: var(--radius);
  color: var(--danger);
  background: var(--danger-bg);
}
.master-error {
  margin-bottom: var(--space-4);
}
.empty.compact {
  padding: var(--space-5);
}
.master-card h2 {
  margin: 0 0 var(--space-3);
  font-size: 1rem;
}
.master-card ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}
.master-card li + li {
  margin-top: var(--space-2);
}

.empty,
.error {
  padding: var(--space-8) var(--space-4);
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.empty h2,
.error h2 {
  margin: 0 0 var(--space-2);
}
.empty p,
.error p {
  margin: 0 auto var(--space-4);
  max-width: 34rem;
  color: var(--muted);
}
.loading {
  display: grid;
  gap: var(--space-3);
}
.skeleton {
  display: block;
  height: 6rem;
  border-radius: var(--radius);
  background: linear-gradient(
    90deg,
    var(--surface-2),
    var(--surface),
    var(--surface-2)
  );
  background-size: 200% 100%;
  animation: pulse 1.5s infinite;
}
.skeleton.wide {
  height: 2.5rem;
  width: 55%;
}
@keyframes pulse {
  to {
    background-position: -200% 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .skeleton {
    animation: none;
  }
}
.toast {
  position: fixed;
  z-index: 30;
  left: var(--space-4);
  right: var(--space-4);
  bottom: calc(5rem + env(safe-area-inset-bottom));
  padding: var(--space-3) var(--space-4);
  color: #fff;
  background: #17211e;
  border-radius: var(--radius);
  text-align: center;
}

@media (min-width: 48rem) {
  .filters {
    grid-template-columns: minmax(16rem, 2fr) 1fr 1fr;
  }
  .stock-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .master-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .master-editor {
    grid-template-columns: minmax(18rem, 0.8fr) minmax(24rem, 1.2fr);
    align-items: start;
  }
  .master-form {
    position: sticky;
    top: 5rem;
  }
}

@media (max-width: 32rem) {
  .master-item {
    align-items: stretch;
    flex-direction: column;
  }
  .inline-actions .text-button {
    flex: 1;
  }
}

@media (min-width: 64rem) {
  .shell {
    display: grid;
    grid-template: "top top" 4rem "side main" 1fr / 14rem 1fr;
    padding-bottom: 0;
  }
  .topbar {
    grid-area: top;
  }
  .side-nav {
    grid-area: side;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-5) var(--space-3);
    border-right: 1px solid var(--border);
    background: var(--surface);
  }
  .side-nav a {
    display: flex;
    gap: var(--space-3);
    align-items: center;
    min-height: 2.75rem;
    padding: 0 var(--space-3);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--muted);
  }
  .side-nav a[aria-current="page"] {
    color: var(--brand);
    background: var(--brand-soft);
    font-weight: 750;
  }
  main {
    grid-area: main;
    width: 100%;
    padding: var(--space-8);
  }
  .bottom-nav {
    display: none;
  }
  .stock-list {
    display: table;
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
  }
  .stock-list li {
    display: table-row;
  }
  .stock-card {
    display: table-cell;
    border: 0;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
  }
  .stock-list li:last-child .stock-card {
    border-bottom: 0;
  }
}