:root {
  --bg: #101018;
  --card: #1c1c30;
  --track: #32324c;
  --text: #e0e0f0;
  --muted: #9a9ab0;
  --dim: #7a7a92;
  --safe: #4caf50;
  --warn: #ffc107;
  --danger: #ff5252;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  background: var(--bg);
  color: var(--text);
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  min-height: 100%;
}

#app {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px 12px;
}

header {
  text-align: center;
  margin-bottom: 18px;
  position: relative;
}

.settings-btn {
  position: absolute;
  right: 0;
  top: 2px;
  border: 1px solid var(--track);
  border-radius: 16px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  padding: 6px 14px;
  cursor: pointer;
}

.settings-btn:active {
  color: var(--text);
  border-color: var(--muted);
}

header h1 {
  font-size: 22px;
  letter-spacing: 1px;
}

header .sub {
  font-size: 13px;
  color: var(--dim);
  margin-top: 4px;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
}

.main-card {
  text-align: center;
  padding: 28px 16px 22px;
}

.db-value {
  font-size: 76px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--text);
}

.db-value.safe { color: var(--safe); }
.db-value.warn { color: var(--warn); }
.db-value.danger { color: var(--danger); }
.db-value.idle { color: #ffffff; }

.db-label {
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
}

.status {
  font-size: 16px;
  font-weight: 500;
  margin-top: 10px;
}

.status.safe { color: var(--safe); }
.status.warn { color: var(--warn); }
.status.danger { color: var(--danger); }
.status.idle { color: var(--muted); }

.updated {
  font-size: 12px;
  color: var(--dim);
  margin-top: 8px;
  min-height: 16px;
}

.chart-card {
  margin-top: 14px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 14px;
  margin-bottom: 10px;
}

.chart-info {
  font-size: 12px;
  color: var(--dim);
}

#chart {
  width: 100%;
  height: 220px;
  display: block;
}

footer {
  text-align: center;
  font-size: 12px;
  color: var(--dim);
  margin-top: 16px;
  padding-bottom: 16px;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 6, 12, 0.86);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.overlay.hidden {
  display: none;
}

.login-box {
  width: 300px;
  text-align: center;
  padding: 26px 22px;
}

.login-box h2 {
  font-size: 20px;
  margin-bottom: 6px;
}

.login-box p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
}

#passwordInput {
  width: 100%;
  height: 40px;
  border-radius: 20px;
  border: 1px solid var(--track);
  background: var(--bg);
  color: var(--text);
  padding: 0 16px;
  font-size: 14px;
  outline: none;
}

#passwordInput:focus {
  border-color: var(--warn);
}

#loginBtn {
  width: 100%;
  height: 40px;
  margin-top: 12px;
  border: none;
  border-radius: 20px;
  background: #4f6ef7;
  color: #ffffff;
  font-size: 15px;
  cursor: pointer;
}

#loginBtn:active {
  opacity: 0.85;
}

.error {
  font-size: 12px;
  color: var(--danger);
  margin-top: 10px;
  min-height: 16px;
}

/* ---------- 警报状态：全页红色脉冲 ---------- */

body.alarming {
  animation: alarm-bg 1s ease-in-out infinite;
}

@keyframes alarm-bg {
  0%, 100% { background: var(--bg); }
  50% { background: #2a0d12; }
}

body.alarming #app header h1 {
  color: var(--danger);
  animation: alarm-text 1s ease-in-out infinite;
}

@keyframes alarm-text {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

/* ---------- 告警播放（新闻联播）：页面内全屏覆盖 ---------- */

.alarm-panel {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: #000;
  overflow: hidden;
}

.alarm-panel.hidden {
  display: none;
}

.alarm-panel-head {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: linear-gradient(rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0));
  z-index: 2;
}

.alarm-panel-title {
  font-size: 15px;
  color: var(--danger);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#alarmStopBtn {
  flex-shrink: 0;
  border: 1px solid var(--danger);
  border-radius: 18px;
  background: rgba(0, 0, 0, 0.5);
  color: var(--danger);
  font-size: 14px;
  padding: 8px 18px;
  cursor: pointer;
}

#alarmStopBtn:active {
  background: rgba(255, 82, 82, 0.25);
}

#alarmVideo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.alarm-play-btn {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 260px;
  max-width: calc(100vw - 48px);
  border: none;
  border-radius: 28px;
  background: var(--danger);
  color: #ffffff;
  font-size: 16px;
  padding: 14px 0;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(255, 82, 82, 0.4);
  z-index: 3;
}

.alarm-play-btn.hidden {
  display: none;
}

.alarm-panel-foot {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  font-size: 12px;
  padding: 18px 16px 14px;
  color: var(--dim);
  background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.75));
  z-index: 2;
}

.alarm-panel-foot a {
  color: var(--dim);
  text-decoration: none;
}

.alarm-panel-foot a:hover {
  color: var(--muted);
  text-decoration: underline;
}

/* ---------- 设置弹窗 ---------- */

.settings-box {
  width: 320px;
  text-align: center;
  padding: 26px 22px;
}

.settings-box h2 {
  font-size: 20px;
  margin-bottom: 6px;
}

.settings-box p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
}

.settings-box input {
  width: 100%;
  height: 40px;
  border-radius: 20px;
  border: 1px solid var(--track);
  background: var(--bg);
  color: var(--text);
  padding: 0 16px;
  font-size: 14px;
  outline: none;
  margin-top: 10px;
}

.settings-box input:focus {
  border-color: var(--warn);
}

#settingsSaveBtn {
  width: 100%;
  height: 40px;
  margin-top: 14px;
  border: none;
  border-radius: 20px;
  background: #4f6ef7;
  color: #ffffff;
  font-size: 15px;
  cursor: pointer;
}

#settingsSaveBtn:active {
  opacity: 0.85;
}

.settings-msg {
  font-size: 12px;
  margin-top: 10px;
  min-height: 16px;
  color: var(--muted);
}

.settings-msg.ok { color: var(--safe); }
.settings-msg.err { color: var(--danger); }

.settings-close {
  border: none;
  background: transparent;
  color: var(--dim);
  font-size: 13px;
  margin-top: 6px;
  cursor: pointer;
  text-decoration: underline;
}