:root {
  --bg: #eeeeee;
  --panel: #ffffff;
  --panel-soft: #f9fafb;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #d1d5db;
  --line-soft: #e5e7eb;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --warning: #b45309;
  --warning-soft: #fffbeb;
  --success-soft: #eff6ff;
  --shadow: 0 10px 30px rgba(31, 41, 55, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.45;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-end;
  margin: 18px auto 0;
  width: min(1180px, calc(100% - 32px));
  padding: 22px 24px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: 0;
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px;
  background: var(--panel-soft);
  border: 1px solid var(--line-soft);
  border-radius: 8px;
}

label {
  color: var(--muted);
  font-weight: 700;
}

select,
button,
input {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  transition: border-color 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

select,
input {
  padding: 7px 10px;
}

button {
  padding: 7px 12px;
  cursor: pointer;
  font-weight: 700;
}

select:focus,
button:focus,
input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.16);
}

button:hover:not(:disabled) {
  background: #f8fafc;
  border-color: var(--accent);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.save-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.save-btn:hover:not(:disabled) {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.delete-btn {
  background: var(--danger-soft);
  border-color: #fecaca;
  color: var(--danger);
}

.new-btn {
  background: var(--success-soft);
  border-color: #bfdbfe;
  color: var(--accent-dark);
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0 34px;
}

.message {
  min-height: 42px;
  margin-bottom: 14px;
  padding: 11px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  box-shadow: 0 3px 12px rgba(31, 41, 55, 0.04);
}

.message.ok {
  background: var(--success-soft);
  border-color: #bfdbfe;
  color: var(--accent-dark);
}

.message.error {
  background: var(--danger-soft);
  border-color: #fecaca;
  color: var(--danger);
}

.message.warning {
  background: var(--warning-soft);
  border-color: #fde68a;
  color: var(--warning);
}

.table-shell {
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 880px;
  border-collapse: collapse;
}

th,
td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: middle;
}

th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #f3f4f6;
  color: #374151;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

tbody tr:nth-child(even) {
  background: #fafafa;
}

tbody tr:hover {
  background: #f8fafc;
}

tbody tr.changed {
  background: #fff7ed;
  box-shadow: inset 4px 0 0 var(--warning);
}

td.editable {
  cursor: cell;
}

td.editable:hover {
  background: #eff6ff;
}

td.actions {
  display: flex;
  gap: 8px;
  min-width: 240px;
  white-space: nowrap;
}

.cell-input {
  width: 100%;
  min-width: 120px;
  background: #ffffff;
}

.empty-row td {
  color: var(--muted);
  text-align: center;
  padding: 28px 12px;
}

@media (max-width: 760px) {
  .topbar {
    width: calc(100% - 20px);
    margin-top: 10px;
    padding: 18px;
  }

  .toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  h1 {
    font-size: 24px;
  }

  main {
    width: calc(100% - 20px);
    padding: 12px 0 24px;
  }
}