:root {
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-border: #e0e0e0;
  --color-text: #333333;
  --color-text-muted: #888888;
  --color-primary: #e55934;
  --color-primary-light: #ff7b57;
  --color-primary-dark: #c94a2a;
  --color-success: #4caf50;
  --color-danger: #f44336;
}

/* Fixed for a 240x320 (QVGA) screen — Energizer E282SC+. */

* {
  box-sizing: border-box;
}

html,
body {
  width: 240px;
  height: 320px;
  overflow: hidden;
}

body {
  margin: 0;
  padding: 6px;
  font-family: sans-serif;
  font-size: 13px;
  background: var(--color-bg);
  color: var(--color-text);
}

.screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 100%;
  height: 100%;
  padding-bottom: 40px;
}

.screen[hidden] {
  display: none;
}

#install-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  padding: 4px 6px;
  background: var(--color-primary);
  text-align: center;
}

#install-btn {
  width: 100%;
  font-size: 12px;
  font-weight: bold;
  padding: 5px 4px;
  border: none;
  border-radius: 6px;
  background: #ffffff;
  color: var(--color-primary);
}

.install-banner {
  font-size: 11px;
  font-weight: bold;
  color: #ffffff;
  margin: 3px 0 0;
  visibility: hidden;
}

.install-banner.visible {
  visibility: visible;
}

.install-banner.error {
  color: #ffe0d9;
}

.screen h1 {
  font-size: 15px;
  font-weight: bold;
  margin: 2px 0 8px;
  color: var(--color-primary);
}

.device-id {
  font-size: 11px;
  font-weight: normal;
  color: var(--color-text-muted);
  margin-left: 4px;
}

input {
  width: 100%;
  font-size: 14px;
  padding: 9px 8px;
  margin-top: 10px;
  text-align: center;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-text);
}

input::placeholder {
  color: var(--color-text-muted);
}

.error {
  color: var(--color-danger);
}

p {
  margin: 6px 0;
}

#status-enabled {
  font-weight: bold;
  color: var(--color-success);
}

.send-result {
  font-size: 12px;
  font-weight: bold;
  margin: 4px 0 0;
  visibility: hidden;
}

.send-result.visible {
  visibility: visible;
}

.send-result.pending {
  color: var(--color-text-muted);
}

.send-result.success {
  color: var(--color-success);
}

.send-result.error {
  color: var(--color-danger);
}

.send-now-wrap {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.round-btn {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-primary) 55%, var(--color-primary-dark) 100%);
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 8px;
  text-align: center;
  box-shadow:
    0 6px 0 var(--color-primary-dark),
    0 9px 10px rgba(0, 0, 0, 0.35),
    inset 0 3px 6px rgba(255, 255, 255, 0.4);
}

.round-btn-action {
  font-size: 18px;
  font-weight: bold;
}

.round-btn-info {
  font-size: 11px;
  font-weight: normal;
  opacity: 0.9;
}

.round-btn:active {
  transform: translateY(4px);
  box-shadow:
    0 2px 0 var(--color-primary-dark),
    0 3px 6px rgba(0, 0, 0, 0.3),
    inset 0 3px 6px rgba(255, 255, 255, 0.25);
}

menu[type='toolbar'] {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  margin: 0;
  padding: 5px 6px;
  list-style: none;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

menu[type='toolbar'] li {
  flex: 1;
}

menu[type='toolbar'] li + li {
  margin-left: 5px;
}

menu[type='toolbar'] button {
  width: 100%;
  font-size: 12px;
  padding: 5px 4px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-text);
}

menu[type='toolbar'] button#pairing-submit,
menu[type='toolbar'] button#status-toggle {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  font-weight: bold;
}

button:focus,
input:focus {
  outline: 2px solid var(--color-primary-dark);
}

menu[type='toolbar'] button:focus {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #ffffff;
  outline: none;
}

.round-btn:focus {
  outline: 4px solid var(--color-primary-dark);
  outline-offset: 4px;
}