:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #1d2433;
  --muted: #697386;
  --line: #d9e1ec;
  --primary: #0f8b8d;
  --primary-dark: #0b696b;
  --danger: #c2410c;
  --success: #0f766e;
  --sidebar: #17202f;
}

* {
  box-sizing: border-box;
}

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

a {
  color: inherit;
  text-decoration: none;
}

input,
select,
textarea,
button {
  font: inherit;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

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

textarea {
  min-height: 96px;
  resize: vertical;
}

.app-shell {
  min-height: 100vh;
  display: flex;
}

.sidebar {
  width: 250px;
  flex: 0 0 250px;
  background: var(--sidebar);
  color: #fff;
  padding: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
}

.brand small,
.topbar span,
.muted {
  color: var(--muted);
}

.sidebar .brand small {
  color: #c8d1de;
}

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

.sidebar nav a {
  padding: 10px 12px;
  border-radius: 6px;
  color: #eef4fb;
}

.sidebar nav a:hover {
  background: rgba(255, 255, 255, 0.1);
}

.main-content {
  flex: 1;
  padding: 24px;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  justify-content: space-between;
  margin-bottom: 22px;
}

.topbar div {
  display: grid;
  gap: 2px;
}

.menu-toggle {
  display: none;
  border: 0;
  background: var(--surface);
  border-radius: 6px;
  padding: 8px 10px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.metric-card,
.panel,
.login-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.metric-card {
  padding: 18px;
}

.metric-card span {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.metric-card strong {
  font-size: 30px;
}

.panel {
  padding: 18px;
  margin-bottom: 18px;
}

.panel-header,
.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-header h1,
.panel-header h2 {
  margin: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-grid .full {
  grid-column: 1 / -1;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 12px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
}

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

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

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

.table-wrap {
  overflow-x: auto;
}

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

th,
td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.badge {
  display: inline-flex;
  border-radius: 999px;
  padding: 4px 9px;
  background: #e7f6f5;
  color: var(--success);
  font-size: 12px;
  font-weight: 700;
}

.alert {
  border-radius: 6px;
  padding: 11px 12px;
  margin-bottom: 16px;
  background: #e7f6f5;
  color: var(--success);
}

.alert-error {
  background: #fff3ed;
  color: var(--danger);
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.login-card {
  width: min(100%, 420px);
  padding: 24px;
}

.brand-login {
  margin-bottom: 16px;
}

.login-card h1 {
  margin: 0 0 18px;
}

.login-card label {
  margin-bottom: 12px;
}

.login-card .btn {
  width: 100%;
}

.search-form {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.details-grid div {
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.details-grid strong {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 900px) {
  .cards-grid,
  .form-grid,
  .details-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    z-index: 10;
  }

  .sidebar-open .sidebar {
    transform: translateX(0);
  }

  .menu-toggle {
    display: inline-flex;
  }

  .main-content {
    padding: 16px;
  }

  .panel-header,
  .actions,
  .search-form {
    align-items: stretch;
    flex-direction: column;
  }
}