/* ─── Design tokens ──────────────────────────────────────────────────────────── */
:root {
  --color-bg:         #f7f8fa;
  --color-surface:    #ffffff;
  --color-surface-2:  #f0f2f5;
  --color-border:     #d9dce3;
  --color-text:       #1a1c22;
  --color-text-muted: #6b7280;
  --color-primary:    #4caf50;
  --color-primary-dk: #388e3c;
  --color-danger:     #e53935;
  --color-checked-bg: #f0fdf4;
  --color-checked-fg: #9ca3af;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --font:  'Segoe UI', system-ui, sans-serif;
  --transition: 0.18s ease;
}

[data-theme="dark"] {
  --color-bg:         #111318;
  --color-surface:    #1e2029;
  --color-surface-2:  #282c38;
  --color-border:     #3a3f50;
  --color-text:       #e8eaf0;
  --color-text-muted: #8890a8;
  --color-primary:    #66bb6a;
  --color-primary-dk: #4caf50;
  --color-danger:     #ef5350;
  --color-checked-bg: #1a2b1a;
  --color-checked-fg: #5a6478;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.35);
  --shadow-md: 0 4px 16px rgba(0,0,0,.45);
}

/* ─── Reset ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}
button { cursor: pointer; border: none; background: transparent; font: inherit; }
input, select { font: inherit; }
label { font-size: 0.85rem; color: var(--color-text-muted); display: block; margin-bottom: 4px; }

/* ─── Top bar ────────────────────────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.topbar__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary-dk);
}
.topbar__actions { display: flex; gap: 8px; }

/* ─── List tabs ──────────────────────────────────────────────────────────────── */
.list-tabs-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: thin;
}
.list-tabs {
  display: flex;
  gap: 6px;
  flex: 1;
  overflow-x: auto;
}
.list-tab {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--color-border);
  font-size: 0.88rem;
  white-space: nowrap;
  background: var(--color-surface-2);
  color: var(--color-text);
  transition: background var(--transition), border-color var(--transition);
}
.list-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  font-weight: 600;
}
.list-tab:hover:not(.active) { background: var(--color-border); }

/* ─── Toolbar ────────────────────────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  flex-wrap: wrap;
}
.toolbar__spacer { flex: 1; }

/* ─── Buttons ────────────────────────────────────────────────────────────────── */
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background var(--transition);
}
.btn-primary:hover  { background: var(--color-primary-dk); }
.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  transition: background var(--transition);
}
.btn-secondary:hover { background: var(--color-border); }
.btn-sm { font-size: 0.82rem; padding: 5px 10px; }
.btn-danger:hover { border-color: var(--color-danger); color: var(--color-danger); }
.btn-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  transition: background var(--transition);
}
.btn-icon:hover { background: var(--color-border); }

/* ─── Suggestions ────────────────────────────────────────────────────────────── */
.suggestions-section {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
}
.suggestions-heading {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 8px;
}
.suggestions-list { display: flex; flex-wrap: wrap; gap: 6px; }
.suggestion-chip {
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-text);
  transition: background var(--transition);
}
.suggestion-chip:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ─── Items ──────────────────────────────────────────────────────────────────── */
.items-container {
  padding: 12px 16px 96px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 640px;
  margin: 0 auto;
  width: 100%;
}
.empty-hint {
  color: var(--color-text-muted);
  text-align: center;
  padding: 40px 0;
  font-size: 0.95rem;
}
.category-section { display: flex; flex-direction: column; gap: 2px; }
.category-heading {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-text-muted);
  padding: 4px 0 4px 4px;
}
.checked-section { opacity: 0.7; }
.checked-heading { color: var(--color-text-muted); }

/* Item row */
.item-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 10px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: background var(--transition);
  min-height: 52px;
}
.item-row:hover { background: var(--color-surface-2); }
.item-checked {
  background: var(--color-checked-bg);
  border-color: transparent;
}
.item-checkbox {
  width: 22px;
  height: 22px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
  cursor: pointer;
}
.item-name {
  flex: 1;
  font-size: 1rem;
  word-break: break-word;
}
.item-checked .item-name {
  text-decoration: line-through;
  color: var(--color-checked-fg);
}
.item-qty {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.btn-delete {
  width: 30px;
  height: 30px;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  border: none;
  background: transparent;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition), color var(--transition);
}
.item-row:hover .btn-delete { opacity: 1; }
.btn-delete:hover { color: var(--color-danger); }

/* ─── FAB ────────────────────────────────────────────────────────────────────── */
.fab {
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.8rem;
  box-shadow: var(--shadow-md);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
  line-height: 1;
}
.fab:hover  { background: var(--color-primary-dk); transform: scale(1.08); }
.fab:active { transform: scale(0.95); }

/* ─── Modal ──────────────────────────────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 500;
  padding: 0;
}
.modal[hidden] { display: none; }
.modal__content {
  background: var(--color-surface);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: 24px 20px 32px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-md);
  animation: slide-up 0.2s ease;
}
@keyframes slide-up {
  from { transform: translateY(30px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
.modal__title { font-size: 1.1rem; font-weight: 700; margin-bottom: 18px; }
.modal__actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}
.form-row { margin-bottom: 14px; }
.form-row--inline { display: flex; gap: 12px; }
.form-row--inline > * { flex: 1; }
.input-text, .input-number, .input-select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition);
}
.input-text:focus, .input-number:focus, .input-select:focus {
  border-color: var(--color-primary);
}
.input-number { max-width: 90px; }
.input-select--full { width: 100%; }
.input-voice-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.input-voice-row .input-text { flex: 1; }

/* ─── Responsive: wider screens ──────────────────────────────────────────────── */
@media (min-width: 640px) {
  .modal {
    align-items: center;
  }
  .modal__content {
    border-radius: var(--radius-md);
    max-width: 440px;
  }
}

/* ─── PWA safe area ──────────────────────────────────────────────────────────── */
@supports (padding: env(safe-area-inset-bottom)) {
  .fab { bottom: calc(24px + env(safe-area-inset-bottom)); }
}

/* ─── Focus visible (accessibility) ─────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}