:root {
  color-scheme: light;
  --bg: #eef2f6;
  --surface: #ffffff;
  --surface-2: #f7f9fb;
  --line: #d8e0e8;
  --text: #18212b;
  --muted: #657386;
  --accent: #167a5b;
  --accent-2: #0f5f8a;
  --danger: #b42318;
  --warn: #9a6700;
  --ok: #14783d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 "Segoe UI", Arial, sans-serif;
  letter-spacing: 0;
}

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

button {
  min-height: 36px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  padding: 0 14px;
  cursor: pointer;
}

button:hover {
  filter: brightness(0.96);
}

.secondary-btn,
.ghost-btn {
  background: #fff;
  color: var(--accent);
}

.ghost-btn {
  border-color: var(--line);
  color: var(--text);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  padding: 9px 10px;
  outline: none;
}

textarea {
  resize: vertical;
  min-height: 112px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(15, 95, 138, 0.12);
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.hidden {
  display: none !important;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-panel {
  width: min(380px, 100%);
  display: grid;
  gap: 16px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 60px rgba(24, 33, 43, 0.08);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-mark {
  color: var(--accent);
  font-size: 26px;
  font-weight: 800;
}

.brand-subtitle {
  color: var(--muted);
  font-weight: 700;
}

.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
}

.sidebar {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 20px;
  padding: 22px 16px;
  background: #f9fbfc;
  border-right: 1px solid var(--line);
}

.side-brand {
  padding: 0 6px;
}

.user-block {
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.user-login {
  font-weight: 700;
}

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

nav {
  display: grid;
  align-content: start;
  gap: 8px;
}

.nav-btn {
  width: 100%;
  justify-content: flex-start;
  border-color: transparent;
  background: transparent;
  color: var(--text);
  text-align: left;
}

.nav-btn.active {
  background: #dff1e9;
  border-color: #b7dfce;
  color: #0e563f;
}

.workspace {
  min-width: 0;
  padding: 22px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: 24px;
  line-height: 1.2;
}

h2 {
  font-size: 18px;
}

.panel {
  display: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.panel.active {
  display: block;
}

.panel-head {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
}

.table-wrap {
  width: 100%;
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 980px;
}

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

th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  background: #fbfcfd;
}

tr[data-imei] {
  cursor: pointer;
}

tr[data-imei]:hover {
  background: #f2f8f6;
}

tr.selected {
  background: #e7f5ef;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  max-width: 100%;
  padding: 2px 8px;
  border-radius: 999px;
  background: #edf2f7;
  color: var(--text);
  white-space: nowrap;
}

.pill.ok {
  background: #dff3e7;
  color: var(--ok);
}

.pill.warn {
  background: #fff4d6;
  color: var(--warn);
}

.pill.danger {
  background: #fde3df;
  color: var(--danger);
}

.form-grid,
.command-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding: 16px;
}

.wide {
  grid-column: span 2;
}

.state-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 0 16px 16px;
}

.state-item {
  min-height: 64px;
  padding: 10px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.state-item span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.state-item strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
}

.command-log {
  border-top: 1px solid var(--line);
}

.error-line {
  min-height: 20px;
  color: var(--danger);
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: min(420px, calc(100vw - 36px));
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 16px 44px rgba(24, 33, 43, 0.14);
}

@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
  }

  .sidebar {
    min-height: auto;
    grid-template-rows: auto auto auto auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .form-grid,
  .command-grid,
  .state-grid {
    grid-template-columns: 1fr;
  }

  .wide {
    grid-column: auto;
  }
}