/* ---------- Theme tokens ---------- */
:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --surface-2: #f8f9fc;
  --border: #e4e7ef;
  --text: #111827;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;
  --success: #059669;
  --success-soft: #ecfdf5;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 16px rgba(16, 24, 40, 0.06);
  --radius: 14px;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0b0f19;
  --surface: #121826;
  --surface-2: #182033;
  --border: #243049;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --primary: #818cf8;
  --primary-hover: #a5b4fc;
  --primary-soft: rgba(129, 140, 248, 0.14);
  --success: #34d399;
  --success-soft: rgba(52, 211, 153, 0.12);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.12);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px 24px 8px;
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
}

:root[data-theme="dark"] .brand-mark {
  color: #0b0f19;
}

.brand h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand p {
  font-size: 13px;
  color: var(--muted);
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.icon-btn:hover {
  border-color: var(--primary);
}

:root[data-theme="dark"] .icon-sun,
:root:not([data-theme="dark"]) .icon-moon {
  display: none;
}

/* ---------- Layout ---------- */
.layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  grid-template-areas:
    "stats stats"
    "form  table";
  gap: 20px;
  max-width: 1360px;
  margin: 0 auto;
  padding: 16px 24px 48px;
  align-items: start;
}

.stats {
  grid-area: stats;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.form-card {
  grid-area: form;
  position: sticky;
  top: 16px;
}

.table-card {
  grid-area: table;
}

/* ---------- Cards ---------- */
.card,
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card {
  padding: 22px;
}

.stat {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--muted);
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.card-head h2 {
  font-size: 16px;
  font-weight: 600;
}

.card-actions {
  display: flex;
  gap: 8px;
}

/* ---------- Form ---------- */
form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label,
legend {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
}

input {
  width: 100%;
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

input[aria-invalid="true"] {
  border-color: var(--danger);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.pricing {
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing legend {
  padding: 0 6px;
}

.total {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  background: var(--surface-2);
  color: var(--muted);
  transition: background 0.2s, color 0.2s;
}

.total[data-state="invalid"] {
  background: var(--danger-soft);
  color: var(--danger);
}

.total strong {
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}

.total[data-state="valid"] {
  background: var(--success-soft);
  color: var(--success);
}

.form-error {
  min-height: 0;
  font-size: 13px;
  color: var(--danger);
}

.form-error:empty {
  display: none;
}

/* ---------- Buttons ---------- */
.btn {
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

:root[data-theme="dark"] .btn-primary {
  color: #0b0f19;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-ghost,
.btn-danger-ghost {
  padding: 7px 12px;
  font-size: 13px;
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-danger-ghost:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.link-btn {
  font: inherit;
  font-size: 13px;
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
}

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

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.search {
  position: relative;
  flex: 1;
}

.search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  width: 18px;
  height: 18px;
  transform: translateY(-50%);
  color: var(--muted);
}

.search input {
  padding-left: 38px;
}

.segmented {
  display: inline-flex;
  padding: 3px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.segmented button {
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.segmented button[aria-checked="true"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

/* ---------- Table ---------- */
.table-wrap {
  position: relative; /* contains the absolutely-positioned .sr-only header */
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  white-space: nowrap;
}

th {
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: var(--surface-2);
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr {
  transition: background 0.12s;
}

tbody tr:hover {
  background: var(--surface-2);
}

tbody tr.is-editing {
  background: var(--primary-soft);
}

.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.product-name {
  font-weight: 600;
}

.muted {
  color: var(--muted);
}

.strong {
  font-weight: 600;
}

.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  background: var(--primary-soft);
  color: var(--primary);
}

.row-actions {
  display: flex;
  justify-content: flex-end;
  gap: 4px;
}

.row-actions button {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.row-actions svg {
  width: 17px;
  height: 17px;
}

.row-actions [data-action="edit"]:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.row-actions [data-action="delete"]:hover {
  background: var(--danger-soft);
  color: var(--danger);
}

.empty {
  padding: 48px 16px;
  text-align: center;
  color: var(--muted);
}

.table-foot {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  background: var(--text);
  color: var(--bg);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity 0.2s, transform 0.2s;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "stats"
      "form"
      "table";
  }

  .form-card {
    position: static;
  }
}

@media (max-width: 640px) {
  .topbar,
  .layout {
    padding-left: 16px;
    padding-right: 16px;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-value {
    font-size: 22px;
  }

  .card {
    padding: 16px;
  }

  .toolbar,
  .card-head {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}