:root {
  --color-primary: #1976d2;
  --color-success: #388e3c;
  --color-danger: #d32f2f;
  --color-text: #212121;
  --color-text-light: #757575;
  --color-bg: #fafafa;
  --color-bg-card: #ffffff;
  --color-border: #e0e0e0;
  --color-locked: #d32f2f;
  --color-free: #388e3c;
  --color-maintenance: #f57c00;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-primary: #42a5f5;
    --color-success: #66bb6a;
    --color-danger: #ef5350;
    --color-text: #ffffff;
    --color-text-light: #bdbdbd;
    --color-bg: #121212;
    --color-bg-card: #1e1e1e;
    --color-border: #424242;
  }
}

:root[data-theme="dark"] {
  --color-primary: #42a5f5;
  --color-success: #66bb6a;
  --color-danger: #ef5350;
  --color-text: #ffffff;
  --color-text-light: #bdbdbd;
  --color-bg: #121212;
  --color-bg-card: #1e1e1e;
  --color-border: #424242;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 16px;
}

.view {
  display: block;
}

.view.hidden {
  display: none;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.header h1 {
  margin: 0;
  font-size: 28px;
}

h1, h2 {
  margin: 0 0 16px 0;
}

h1 {
  font-size: 32px;
  text-align: center;
  margin-bottom: 32px;
}

h2 {
  font-size: 20px;
}

.formGroup {
  margin-bottom: 16px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--color-text);
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 16px;
  background-color: var(--color-bg-card);
  color: var(--color-text);
}

input[type="text"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.1);
}

.btn {
  padding: 12px 24px;
  font-size: 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
  min-height: 44px;
  min-width: 44px;
}

.btn:active {
  transform: scale(0.98);
}

.btnPrimary {
  background-color: var(--color-primary);
  color: white;
  width: 100%;
}

.btnPrimary:hover {
  background-color: #1565c0;
}

.btnSecondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  padding: 8px 16px;
  font-size: 14px;
}

.btnSecondary:hover {
  background-color: var(--color-bg-card);
}

.btnSuccess {
  background-color: var(--color-success);
  color: white;
  flex: 1;
  margin: 4px;
}

.btnSuccess:hover {
  background-color: #2e7d32;
}

.btnDanger {
  background-color: var(--color-danger);
  color: white;
  flex: 1;
  margin: 4px;
}

.btnDanger:hover {
  background-color: #c62828;
}

.childrenGrid {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}

.childCard {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

.childCard h2 {
  margin-top: 0;
}

.status {
  margin-bottom: 16px;
  padding: 12px;
  background-color: var(--color-bg);
  border-radius: 4px;
}

.state {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 4px;
  font-weight: 500;
  margin-bottom: 12px;
  font-size: 14px;
}

.stateLocked {
  background-color: var(--color-locked);
  color: white;
}

.stateFree {
  background-color: var(--color-success);
  color: white;
}

.stateMaintenance {
  background-color: var(--color-maintenance);
  color: white;
}

.detail {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
}

.detail .label {
  font-weight: 500;
  color: var(--color-text-light);
}

.detail .value {
  color: var(--color-text);
  word-break: break-word;
}

.batteryLow {
  color: var(--color-danger);
  font-weight: 500;
}

.noStatus {
  padding: 12px;
  text-align: center;
  color: var(--color-text-light);
  font-size: 14px;
}

.actions {
  display: flex;
  gap: 8px;
  justify-content: space-between;
}

.error {
  background-color: #ffebee;
  color: #c62828;
  padding: 12px;
  border-radius: 4px;
  margin-bottom: 16px;
  display: block;
  font-size: 14px;
  border-left: 4px solid var(--color-danger);
}

.error.hidden {
  display: none;
}

@media (prefers-color-scheme: dark) {
  .error:not(.hidden) {
    background-color: #5d1f1f;
    color: #ff6b6b;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 12px;
  }

  h1 {
    font-size: 24px;
    margin-bottom: 24px;
  }

  .header h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 18px;
  }

  .btn {
    padding: 14px 20px;
    font-size: 16px;
  }

  .childCard {
    padding: 12px;
  }

  .actions {
    flex-wrap: wrap;
  }

  .btnSuccess,
  .btnDanger {
    min-width: calc(50% - 8px);
  }
}