:root {
  color-scheme: light;
  --bg: #f3f4f6;
  --panel: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #d1d5db;
  --accent: #111827;
  --accent-soft: #e5e7eb;
  --danger: #b91c1c;
  --radius: 18px;
}

* { box-sizing: border-box; }

html { font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
}

button, input, select { font: inherit; }
button { touch-action: manipulation; }

.app-shell {
  width: min(100%, 980px);
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 4px; font-size: clamp(2.2rem, 7vw, 4.8rem); line-height: .95; letter-spacing: -.04em; }
h2 { margin-bottom: 0; font-size: 1.5rem; }
.eyebrow { margin-bottom: 8px; color: var(--muted); font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.subtitle { margin-bottom: 0; color: var(--muted); font-size: 1rem; }

.primary-button,
.secondary-button,
.icon-button,
.swipe-edit-action {
  min-height: 52px;
  border-radius: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 750;
}

.primary-button { padding: 0 20px; background: var(--accent); color: #fff; }
.secondary-button { padding: 0 18px; background: #fff; border-color: var(--border); color: var(--text); }
.icon-button { width: 52px; background: transparent; color: var(--text); font-size: 2rem; line-height: 1; }
.swipe-row {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}
.swipe-edit-action {
  position: absolute;
  z-index: 1;
  inset: 0 auto 0 0;
  width: 92px;
  border: 0;
  border-radius: var(--radius) 0 0 var(--radius);
  background: #dbeafe;
  color: #1e3a8a;
}
.swipe-delete-hint {
  position: absolute;
  z-index: 1;
  inset: 0 0 0 auto;
  width: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fee2e2;
  color: var(--danger);
  font-weight: 800;
}
.swipe-row.edit-open .item-card { transform: translateX(92px); }
.swipe-row.swiping .item-card { transition: none; }
button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 3px solid #60a5fa;
  outline-offset: 2px;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 12px;
  margin-bottom: 18px;
}

.search-wrap { position: relative; display: block; }
.search-icon { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 1.5rem; pointer-events: none; }
input[type="search"], input[type="text"], input[type="number"], select {
  width: 100%;
  min-height: 56px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  color: var(--text);
  padding: 0 16px;
  font-size: 1rem;
}
.search-wrap input { padding-left: 50px; }

.status-message { min-height: 24px; margin-bottom: 4px; color: var(--muted); font-size: .92rem; }
.inventory { display: grid; gap: 22px; }
.category-block { display: grid; gap: 10px; }
.category-heading { margin: 0 4px 2px; font-size: 1rem; color: var(--muted); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.item-list { display: grid; gap: 10px; }

.item-card {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  min-height: 82px;
  padding: 14px 14px 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  transition: transform 160ms ease;
  touch-action: pan-y;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.item-name { margin: 0 0 4px; font-size: 1.08rem; font-weight: 800; line-height: 1.2; }
.item-meta { margin: 0; color: var(--muted); font-size: .92rem; }
.quantity-control { display: grid; grid-template-columns: 54px minmax(54px, auto) 54px; align-items: center; gap: 8px; }
.qty-button {
  width: 54px;
  height: 54px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  color: var(--text);
  font-size: 1.8rem;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
}
.qty-button:active { background: var(--accent-soft); }
.quantity { min-width: 54px; text-align: center; font-weight: 900; font-size: 1.18rem; }
.item-card.zero { opacity: .58; }
.item-card.zero .item-name { text-decoration: line-through; }

.empty-state {
  padding: 34px 20px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  text-align: center;
  color: var(--muted);
  background: rgba(255,255,255,.6);
}

.drag-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(17, 24, 39, .46);
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease;
}
.drag-overlay[hidden] { display: none; }
.drag-overlay.active { opacity: 1; }

body.drag-mode {
  -webkit-user-select: none;
  user-select: none;
  overscroll-behavior: none;
}

.swipe-row.drag-source { opacity: .16; }

.drag-ghost {
  position: fixed !important;
  z-index: 60 !important;
  margin: 0 !important;
  pointer-events: none !important;
  background: #fff7ed !important;
  border-color: #f59e0b !important;
  box-shadow: 0 16px 38px rgba(17, 24, 39, .28);
  transform: scale(1.025) !important;
  transition: none !important;
}
.drag-ghost button { pointer-events: none; }

.drag-placeholder {
  min-height: 82px;
  border: 2px dashed #9ca3af;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .78);
}
.category-block.drag-target .category-heading {
  color: var(--text);
}
.category-block.drag-target .item-list {
  outline: 2px dashed #9ca3af;
  outline-offset: 5px;
  border-radius: var(--radius);
}

.undo-toast {
  position: fixed;
  z-index: 80;
  left: 50%;
  bottom: 22px;
  bottom: max(22px, env(safe-area-inset-bottom));
  width: min(calc(100% - 28px), 520px);
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 10px 10px 18px;
  border-radius: 16px;
  background: #111827;
  color: #fff;
  box-shadow: 0 12px 28px rgba(17, 24, 39, .28);
  opacity: 0;
  transform: translate(-50%, 14px);
  transition: opacity 150ms ease, transform 150ms ease;
}
.undo-toast[hidden] { display: none; }
.undo-toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}
.undo-toast span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 700;
}
.undo-toast button {
  flex: 0 0 auto;
  min-width: 76px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: 12px;
  background: transparent;
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.diagnostics { margin-top: 30px; }
.diagnostics details { border-top: 1px solid var(--border); padding-top: 16px; }
.diagnostics summary { cursor: pointer; font-weight: 750; color: var(--muted); min-height: 44px; display: flex; align-items: center; }
.diagnostic-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin: 10px 0; }
.diagnostic-grid > div { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 12px; min-width: 0; }
.diagnostic-grid span { display: block; color: var(--muted); font-size: .75rem; margin-bottom: 3px; }
.diagnostic-grid strong { display: block; overflow-wrap: anywhere; font-size: .9rem; }
.diagnostic-note { color: var(--muted); font-size: .9rem; }
.changelog { margin: 16px 0 18px; padding: 14px 16px; background: #fff; border: 1px solid var(--border); border-radius: 12px; }
.changelog h3 { margin: 0 0 8px; font-size: .95rem; }
.changelog ul { margin: 0; padding-left: 20px; }
.changelog li { margin: 7px 0; color: var(--muted); line-height: 1.4; }

#addDialog {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: min(92vw, 560px);
  max-height: calc(100% - 24px);
  margin: 0;
  border: 0;
  border-radius: 22px;
  padding: 0;
  color: var(--text);
  background: transparent;
  overflow: auto;
}
#addDialog::backdrop { background: rgba(17,24,39,.52); }
.dialog-card { background: #fff; padding: 22px; border-radius: 22px; display: grid; gap: 16px; }
.dialog-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.dialog-card label { display: grid; gap: 7px; font-weight: 750; font-size: .92rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 2px; }

@media (max-width: 680px) {
  .app-shell { padding: 18px 14px 28px; }
  .topbar { align-items: center; }
  .topbar .primary-button { min-width: 118px; }
  .toolbar { grid-template-columns: 1fr; }
  .item-card { grid-template-columns: minmax(0,1fr); align-items: stretch; }
  .quantity-control { grid-template-columns: 60px 1fr 60px; }
  .qty-button { width: 60px; height: 58px; }
  .diagnostic-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 681px) and (pointer: coarse) {
  .app-shell { padding: 32px; }
  .item-card { min-height: 96px; padding: 18px 18px 18px 22px; }
  .item-name { font-size: 1.28rem; }
  .item-meta { font-size: 1rem; }
  .qty-button { width: 64px; height: 64px; font-size: 2rem; }
  .quantity-control { grid-template-columns: 64px minmax(64px, auto) 64px; }
  .quantity { font-size: 1.35rem; }
}