/* SASUGOD! Buy — shared M3 admin components, linked site-wide (admin / index / signup /
   promotions / liff_listing / liff_product / live / referral / inbound / stock / sales /
   logistics / settings_* pages). Design tokens + base type scale + core components come
   from m3.css, which MUST be linked BEFORE this file. This file only keeps buy-specific
   tokens and components not covered by m3.css. Pages keep their own local <style> block
   for page-specific rules and intentional overrides of the shared components below. */
:root {
  /* buy-specific semantic tokens not provided by m3.css */
  --md-warning: #7A5200;
  --md-warning-container: #FFDEA9;
  --md-on-warning-container: #281A00;
  --md-success-container: #B9F0DA;
  --md-on-success-container: #002115;
  --elevation-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px 1px rgba(0,0,0,.15);
  --elevation-2: 0 1px 2px rgba(0,0,0,.30), 0 2px 6px 2px rgba(0,0,0,.15);
  --elevation-3: 0 1px 3px rgba(0,0,0,.30), 0 4px 8px 3px rgba(0,0,0,.15);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--md-surface);
  color: var(--md-on-surface);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  line-height: 1;
  vertical-align: middle;
  font-size: 20px;
  user-select: none;
}
.icon-fill { font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24; }
.hidden { display: none !important; }

.top-app-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 64px;
  background: var(--md-surface-container-low);
  display: flex;
  align-items: center;
  padding: 0 8px 0 8px;
  gap: 4px;
}
.bar-title { flex: 1; font-size: 20px; font-weight: 700; padding: 0 8px; }

.content-pad { padding: 16px; max-width: 1100px; margin: 0 auto; }

.section-title {
  font-size: 12px; letter-spacing: .8px; text-transform: uppercase;
  color: var(--md-on-surface-variant); margin: 20px 0 8px;
}

/* ── Cards ─────────────────────────────────────────────────────────── */
.card {
  background: var(--md-surface-container-low);
  border-radius: var(--shape-lg);
  padding: 16px;
  margin-bottom: 12px;
}
.card-filled   { background: var(--md-surface-container-high); }
.card-outlined { border: 1px solid var(--md-outline-variant); background: transparent; }
.card-error    { background: var(--md-error-container); color: var(--md-on-error-container); }
.card-warning  { background: var(--md-warning-container); color: var(--md-on-warning-container); }

/* ── Buttons ───────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: var(--shape-xl);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: filter .15s, box-shadow .15s;
  white-space: nowrap;
}
.btn .material-symbols-outlined { font-size: 18px; }
.btn-filled  { background: var(--md-primary); color: var(--md-on-primary); }
.btn-filled:hover  { filter: brightness(1.08); }
.btn-outlined { background: transparent; color: var(--md-primary); border: 1px solid var(--md-outline); }
.btn-outlined:hover { background: color-mix(in srgb, var(--md-primary) 8%, transparent); }
.btn-text    { background: transparent; color: var(--md-primary); padding: 6px 12px; }
.btn-tonal   { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.btn-error   { background: var(--md-error-container); color: var(--md-on-error-container); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-sm .material-symbols-outlined { font-size: 16px; }
.btn-block { width: 100%; }

/* ── Icon Button ───────────────────────────────────────────────────── */
.icon-btn {
  width: 40px; height: 40px;
  border-radius: var(--shape-full);
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--md-on-surface-variant);
  transition: background .15s;
  flex-shrink: 0;
}
.icon-btn:hover { background: color-mix(in srgb, var(--md-on-surface) 8%, transparent); }

/* ── Chips ─────────────────────────────────────────────────────────── */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--shape-sm);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .5px;
}
.chip-success { background: var(--md-success-container); color: var(--md-on-success-container); }
.chip-warning { background: var(--md-warning-container); color: var(--md-on-warning-container); }
.chip-error   { background: var(--md-error-container);   color: var(--md-on-error-container);   }
.chip-primary { background: var(--md-primary-container); color: var(--md-on-primary-container); }

/* ── Fields ────────────────────────────────────────────────────────── */
.field { margin-bottom: 12px; }
.field label {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  margin-bottom: 4px;
  letter-spacing: .5px;
  text-transform: uppercase;
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--md-outline);
  border-radius: var(--shape-sm);
  background: var(--md-surface-container-lowest);
  color: var(--md-on-surface);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color .15s, border-width .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--md-primary);
  border-width: 2px;
  padding: 9px 11px;
}
.field-row { display: flex; gap: 8px; flex-wrap: wrap; }
.field-row .field { flex: 1; min-width: 140px; }

/* ── Tabs ──────────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--md-outline-variant);
  margin-bottom: 12px;
  overflow-x: auto;
}
.tab {
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  border-bottom: 3px solid transparent;
  transition: color .15s, border-color .15s;
  white-space: nowrap;
}
.tab.active {
  color: var(--md-primary);
  border-bottom-color: var(--md-primary);
}
.tab:hover { color: var(--md-primary); }

/* ── Table ─────────────────────────────────────────────────────────── */
.m3-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.m3-table thead th {
  text-align: left;
  font-size: 10px;
  font-weight: 700;
  color: var(--md-on-surface-variant);
  letter-spacing: .8px;
  text-transform: uppercase;
  padding: 0 8px 8px 0;
  border-bottom: 1px solid var(--md-outline-variant);
  white-space: nowrap;
}
.m3-table tbody tr { border-bottom: 1px solid var(--md-outline-variant); }
.m3-table tbody tr:last-child { border-bottom: none; }
.m3-table tbody td { padding: 10px 8px 10px 0; vertical-align: middle; }
.m3-table tbody tr.low-stock { background: color-mix(in srgb, var(--md-error-container) 50%, transparent); }
.m3-table tbody tr.low-stock td { color: var(--md-on-error-container); }

/* ── Summary Grid ──────────────────────────────────────────────────── */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 4px 0;
}
.summary-cell  { text-align: center; }
.summary-value { font-size: 22px; font-weight: 700; }
.summary-label { font-size: 11px; color: var(--md-on-surface-variant); margin-top: 2px; letter-spacing: .4px; }

/* ── Alerts ────────────────────────────────────────────────────────── */
.alert {
  padding: 12px;
  border-radius: var(--shape-md);
  margin-bottom: 12px;
  font-size: 13px;
}
.alert-error { background: var(--md-error-container); color: var(--md-on-error-container); }
.alert-warn  { background: var(--md-warning-container); color: var(--md-on-warning-container); }
.alert-info  { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }

/* ── Bottom sheet modal ─────────────────────────────────────────────── */
.sheet-scrim {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 40;
}
.sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-width: 560px;
  margin: 0 auto;
  background: var(--md-surface-container-low);
  border-radius: var(--shape-xl) var(--shape-xl) 0 0;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  z-index: 41;
  animation: slideUp .25s cubic-bezier(.2,0,0,1);
}
@keyframes slideUp { from { transform:translateY(100%); } to { transform:translateY(0); } }
.sheet-handle {
  width: 32px; height: 4px;
  background: var(--md-outline-variant);
  border-radius: var(--shape-full);
  margin: 12px auto 0;
  flex-shrink: 0;
}
.sheet-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 12px 16px;
}
.sheet-title    { font-size: 18px; font-weight: 700; }
.sheet-subtitle { font-size: 12px; color: var(--md-on-surface-variant); margin-top: 2px; }
.sheet-divider  { height: 1px; background: var(--md-outline-variant); }
.sheet-body     { overflow-y: auto; flex: 1; padding: 12px 16px; }
.sheet-footer   { padding: 12px 16px; border-top: 1px solid var(--md-outline-variant); }

@media (max-width: 600px) {
  .summary-grid { grid-template-columns: repeat(3, 1fr); }
  .field-row { flex-direction: column; gap: 0; }
}