:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --ink: #17202a;
  --muted: #6b7280;
  --line: #dce2e8;
  --red: #c62828;
  --green: #16794c;
  --blue: #1d4ed8;
  --amber: #b45309;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
  border-radius: 6px;
  background: var(--ink);
  color: white;
  cursor: pointer;
  padding: 10px 14px;
}

button:hover {
  filter: brightness(0.95);
}

input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--ink);
  background: white;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 250px 1fr;
}

.sidebar {
  background: #111827;
  color: white;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.brand small {
  display: block;
  color: #b8c0cc;
  margin-top: 2px;
}

.mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: #e11d48;
  font-weight: 700;
}

nav {
  display: grid;
  gap: 8px;
}

.nav,
.ghost {
  width: 100%;
  text-align: left;
  background: transparent;
  color: #d7dce4;
}

.nav.active,
.nav:hover,
.ghost:hover {
  background: #243041;
  color: white;
}

.content {
  padding: 28px;
  min-width: 0;
}

.login-panel {
  max-width: 980px;
  min-height: calc(100vh - 56px);
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
  align-items: center;
}

.login-panel h1,
.topbar h1 {
  margin: 0;
  font-size: 34px;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

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

.form,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.form {
  display: grid;
  gap: 14px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 22px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 14px;
}

.metric {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.metric strong {
  display: block;
  font-size: 28px;
  margin-top: 8px;
}

.grid {
  display: grid;
  gap: 16px;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.toolbar {
  display: grid;
  grid-template-columns: 1fr 170px 120px;
  gap: 10px;
  margin-bottom: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

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

.danger {
  background: var(--red);
}

.success {
  background: var(--green);
}

.warning {
  background: var(--amber);
}

.secondary {
  background: var(--blue);
}

.error {
  color: var(--red);
  min-height: 18px;
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .shell,
  .login-panel,
  .split {
    grid-template-columns: 1fr;
  }

  .sidebar {
    min-height: auto;
  }

  .cards {
    grid-template-columns: repeat(2, minmax(130px, 1fr));
  }

  .toolbar {
    grid-template-columns: 1fr;
  }
}