.device-management {
  display: grid;
  grid-template-columns: minmax(320px, 460px) minmax(0, 1fr);
  gap: 24px;
  width: 100%;
  padding: 28px 20px 28px 18px;
  overflow: auto;
  background:
    radial-gradient(circle at 85% 20%, rgba(34, 197, 94, 0.11), transparent 30%),
    linear-gradient(135deg, var(--bg) 0%, var(--header-bg) 55%, rgba(17, 20, 34, 0.05) 100%);
}

.device-panel,
.device-list-panel {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
  padding: 28px 24px;
}

.device-panel { align-self: start; }
.device-list-panel { min-height: 330px; }

.device-intro { margin-bottom: 24px; }
.field-help {
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.5;
  margin: 1px 0 7px;
}
.field-help code {
  color: var(--text-dim);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.device-list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.device-list-header h2 {
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1.2;
}

.device-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.12);
}

.device-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 420px;
}

.device-table th,
.device-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
}

.device-table th {
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(148, 163, 184, 0.08);
}

.device-table tbody tr:hover {
  background: rgba(79, 142, 247, 0.06);
}

.device-empty {
  color: var(--text-muted);
  text-align: center;
  padding: 18px 12px;
}

.device-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.config-device-button,
.remove-device-button,
.config-submit-button,
.secondary-button {
  border: 0;
  border-radius: 7px;
  padding: 8px 12px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: filter var(--transition), transform var(--transition), box-shadow var(--transition);
}

.config-device-button,
.config-submit-button {
  background: rgba(59, 130, 246, 0.12);
  color: #93c5fd;
  box-shadow: inset 0 0 0 1px rgba(96, 165, 250, 0.25);
}

.config-device-button:hover,
.config-submit-button:hover {
  filter: brightness(1.08);
}

.config-device-button:active,
.config-submit-button:active {
  transform: translateY(1px);
}

.remove-device-button {
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
}

.remove-device-button:hover {
  filter: brightness(1.08);
}

.remove-device-button:active {
  transform: translateY(1px);
}

.secondary-button {
  background: rgba(148, 163, 184, 0.12);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.2);
}

.fleet-select-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.fleet-select-row select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.16);
  color: var(--text);
  padding: 12px 14px;
  font: inherit;
}

.fleet-form {
  display: grid;
  gap: 12px;
}

.fleet-form-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.fleet-list-wrapper {
  margin-top: 18px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.fleet-list-header-row h4 {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 0.95rem;
}

.fleet-list {
  display: grid;
  gap: 10px;
}

.fleet-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(148, 163, 184, 0.04);
}

.fleet-item-name {
  color: var(--text);
  font-weight: 600;
}

.fleet-item-meta {
  color: var(--text-muted);
  font-size: 12px;
}

.fleet-item-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.device-modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 1000;
}

.device-modal[hidden] {
  display: none;
}

.device-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.72);
}

.device-modal-dialog {
  position: relative;
  width: min(90vw, 440px);
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  padding: 20px 20px 18px;
}

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

.device-modal-header h3 {
  margin: 0;
  color: var(--text);
  font-size: 1.2rem;
}

.modal-close-button {
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 8px;
  background: rgba(148, 163, 184, 0.12);
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.device-modal form {
  display: grid;
  gap: 12px;
}

.device-modal label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
}

.device-modal input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.16);
  color: var(--text);
  padding: 12px 14px;
  font: inherit;
}

.device-modal input:focus {
  outline: 2px solid rgba(96, 165, 250, 0.45);
  outline-offset: 2px;
}

.device-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
}

@media (max-width: 900px) {
  .device-management {
    grid-template-columns: 1fr;
    padding: 18px 14px 28px;
  }
}