:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --line: #d5dee9;
  --line-strong: #a7b4c5;
  --text: #111827;
  --muted: #667085;
  --blue: #1d4ed8;
  --blue-soft: #e8f0ff;
  --green: #047857;
  --red: #b42318;
  --amber: #b45309;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.07);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Segoe UI, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 14px;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
  padding: 10px 18px;
}
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand {
  color: var(--text);
  text-decoration: none;
  font-size: 18px;
  font-weight: 700;
}
.user-pill {
  color: #334155;
  background: #eef4ff;
  border: 1px solid #c7d7fe;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
}
.session-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}
.session-tools form { margin: 0; }
.logout-button {
  min-height: 26px;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 12px;
  color: #344054;
  background: #fff;
}
.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.topbar nav a, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 34px;
  padding: 7px 11px;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--text);
  text-decoration: none;
  border-radius: 6px;
}
.topbar nav a:hover, .button:hover { border-color: var(--blue); color: var(--blue); }
.topbar nav a.active {
  background: var(--blue-soft);
  color: var(--blue);
  border-color: #9db7ff;
  font-weight: 600;
}
.button.small { padding: 5px 8px; min-height: 28px; font-size: 12px; }
.button.primary, button.primary {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}
.button.primary:hover, button.primary:hover { color: #fff; filter: brightness(0.96); }
.page {
  width: min(1680px, 100%);
  margin: 0 auto;
  padding: 18px;
}
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.page-header p { margin: 4px 0 0; color: var(--muted); }
.header-actions { display: flex; flex-wrap: wrap; gap: 8px; }
h1 { margin: 0 0 12px; font-size: 26px; }
h2 { margin: 0 0 10px; font-size: 17px; }
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 14px;
  overflow: auto;
  box-shadow: var(--shadow);
}
.panel.narrow { max-width: 540px; margin: 28px auto; }
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  padding: 16px;
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.card span, .card small { display: block; color: var(--muted); }
.card strong { display: block; margin: 5px 0; font-size: 30px; }
.grid-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
  align-items: end;
}
.grid-form.cols-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-form.cols-4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.grid-form.cols-5 { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
label {
  display: grid;
  gap: 5px;
  font-size: 13px;
  color: #344054;
  font-weight: 600;
}
input, select, button {
  font: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 8px 9px;
  background: #fff;
}
input:focus, select:focus {
  outline: 2px solid #bfdbfe;
  border-color: var(--blue);
}
button { cursor: pointer; }
button.link {
  border: 0;
  background: transparent;
  color: var(--blue);
  padding: 0;
}
.wide { grid-column: span 2; }
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  white-space: nowrap;
}
th, td {
  border: 1px solid #dbe3ec;
  padding: 7px 9px;
  text-align: right;
}
th:first-child, td:first-child,
td:nth-child(2) { text-align: left; }
th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #eef2f7;
  font-weight: 700;
}
tbody tr:nth-child(even) { background: #fbfdff; }
tbody tr:hover { background: #eef6ff; }
tr.diff { background: #fee2e2; }
.cell-link {
  display: block;
  color: var(--text);
  text-decoration: none;
}
.cell-link:hover {
  color: var(--blue);
  text-decoration: underline;
}
.file-link {
  color: var(--blue);
  font-weight: 600;
  text-decoration: none;
}
.file-link:hover { text-decoration: underline; }
.hint {
  color: var(--muted);
  font-size: 13px;
  margin: 10px 0 0;
}
.totals {
  margin-top: 10px;
  font-weight: 700;
  color: #334155;
}
.muted { color: var(--muted); font-size: 13px; }
.messages { margin-bottom: 12px; }
.message {
  border: 1px solid var(--line);
  background: #fff;
  padding: 9px 11px;
  border-radius: 6px;
  margin-bottom: 6px;
}
.message.success { border-color: #86efac; background: #f0fdf4; color: var(--green); }
.message.warning { border-color: #fde68a; background: #fffbeb; color: var(--amber); }
.message.danger { border-color: #fecaca; background: #fef2f2; color: var(--red); }
.warnings {
  margin: 0;
  padding-left: 22px;
  white-space: pre-wrap;
}
canvas {
  width: 100%;
  background: white;
  border: 1px solid var(--line);
  border-radius: 6px;
}
@media (max-width: 760px) {
  .page { padding: 12px; }
  .page-header, .brand-row { display: block; }
  .session-tools { margin-top: 8px; }
  .header-actions { margin-top: 10px; }
  .topbar nav { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .topbar nav a { white-space: nowrap; }
  .wide { grid-column: span 1; }
}