:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: #ffffff;
  --border: #d9e1ec;
  --text: #1f2a37;
  --muted: #667085;
  --brand: #155eef;
  --danger: #b42318;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.layout { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar {
  background: #0f172a;
  color: #fff;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.sidebar a {
  color: #dbeafe;
  text-decoration: none;
  display: block;
  margin: 10px 0;
}
.brand { font-size: 24px; font-weight: 700; }
.content { padding: 24px; }
.page-header { margin-bottom: 20px; }
.grid.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}
label { display: block; margin-bottom: 12px; color: var(--muted); }
input, textarea, select, button {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-top: 6px;
  font: inherit;
}
textarea { min-height: 100px; resize: vertical; }
button {
  background: var(--brand);
  color: #fff;
  border: none;
  cursor: pointer;
}
button.danger { background: var(--danger); }
button.ghost { background: transparent; border: 1px solid #475467; }
.button-row { display: flex; gap: 12px; }
.button-row form { flex: 1; }
.alert { padding: 12px; border-radius: 8px; margin-bottom: 12px; }
.alert.success { background: #ecfdf3; color: #027a48; }
.alert.error { background: #fef3f2; color: #b42318; }
.log-box {
  min-height: 240px;
  max-height: 420px;
  overflow: auto;
  background: #0b1220;
  color: #d1fae5;
  padding: 16px;
  border-radius: 10px;
}
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--border); padding: 10px; text-align: left; vertical-align: top; }
.mono { font-family: Consolas, monospace; }
.filter-row { display: flex; gap: 12px; align-items: end; }
.filter-row > * { flex: 1; }
.login-page { display: grid; place-items: center; min-height: 100vh; }
.login-card {
  width: min(420px, calc(100vw - 32px));
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
}
.checkbox { display: flex; gap: 8px; align-items: center; }
.checkbox input { width: auto; margin: 0; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { min-height: auto; }
  .grid.two { grid-template-columns: 1fr; }
  .filter-row { flex-direction: column; align-items: stretch; }
}