:root {
  --primary: #07c160;
  --primary-dark: #06ad56;
  --danger: #ff6b6b;
  --danger-dark: #ee5a5a;
  --warning: #ffa940;
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #323233;
  --text-light: #969799;
  --border: #ebedf0;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  padding: 12px;
}

.app {
  max-width: 480px;
  margin: 0 auto;
}

/* Topbar */
.topbar {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}

.title-wrap {
  margin-bottom: 12px;
}

.badge {
  display: inline-block;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
  font-weight: 600;
}

h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
}

.top-metrics {
  display: flex;
  gap: 12px;
}

.chip {
  flex: 1;
  background: var(--bg);
  border-radius: 12px;
  padding: 10px 12px;
  text-align: center;
}

.chip-label {
  display: block;
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 4px;
}

.chip-value {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

/* Status Panel */
.status-panel {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}

.status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 14px;
}

.meter {
  height: 24px;
  background: var(--bg);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 16px;
  position: relative;
}

.meter-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-dark) 100%);
  width: 100%;
  transition: width 0.05s linear, background 0.2s;
  border-radius: 12px;
}

.meter-timer .meter-fill {
  background: linear-gradient(90deg, var(--primary) 0%, var(--warning) 50%, var(--danger) 100%);
}

.danger-zone {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
}

.zone-safe {
  background: #e8f5e9;
  color: #2e7d32;
  padding: 8px 4px;
  border-radius: 8px;
}

.zone-danger {
  background: #ffebee;
  color: #c62828;
  padding: 8px 4px;
  border-radius: 8px;
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.bottom-row {
  display: flex;
  justify-content: space-between;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.bottom-row p {
  font-size: 13px;
  color: var(--text-light);
  margin: 0;
}

#titleLabel {
  color: var(--warning);
  font-weight: 700;
}

/* Message Log */
.message-log {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}

.message-log h2 {
  font-size: 14px;
  margin-bottom: 12px;
  color: var(--text-light);
}

.log-list {
  max-height: 160px;
  overflow-y: auto;
  font-size: 13px;
}

.log-entry {
  padding: 8px 10px;
  background: var(--bg);
  border-radius: 8px;
  margin-bottom: 6px;
  border-left: 3px solid var(--border);
  transition: border-color 0.2s;
}

.log-entry.success {
  border-left-color: var(--primary);
  background: #e8f5e9;
}

.log-entry.fail {
  border-left-color: var(--danger);
  background: #ffebee;
}

.log-entry .time {
  color: var(--text-light);
  font-size: 12px;
}

.log-entry .note {
  color: #666;
  font-size: 12px;
  margin-top: 4px;
}

/* Control Panel */
.control-panel {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  text-align: center;
}

.primary-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 16px 32px;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  transition: transform 0.1s, background 0.2s;
}

.primary-btn:active {
  transform: scale(0.98);
  background: var(--primary-dark);
}

.primary-btn:disabled {
  background: #c8c9cc;
  cursor: not-allowed;
  transform: none;
}

.secondary-btn {
  background: var(--card-bg);
  color: var(--primary);
  border: 2px solid var(--primary);
  padding: 16px 32px;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  margin-top: 12px;
  transition: transform 0.1s, background 0.2s;
}

.secondary-btn:active:not(:disabled) {
  transform: scale(0.98);
  background: #f0f9ff;
}

.secondary-btn:disabled {
  border-color: #c8c9cc;
  color: #c8c9cc;
  cursor: not-allowed;
}

.large {
  padding: 20px 32px;
  font-size: 20px;
}

.tip-box {
  margin-top: 16px;
  padding: 12px;
  background: #fff8e1;
  border-radius: 8px;
  font-size: 13px;
  color: #856404;
}

.tip-box h2 {
  font-size: 13px;
  margin-bottom: 6px;
}

.tip-box ul {
  margin: 0;
  padding-left: 20px;
}

.tip-box li {
  margin-bottom: 4px;
}

/* Footer */
.footer {
  text-align: center;
  font-size: 12px;
  color: var(--text-light);
  padding: 16px;
  line-height: 1.8;
}

/* Animations */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

.shake {
  animation: shake 0.3s ease-in-out;
}

@keyframes celebrate {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.celebrate {
  animation: celebrate 0.4s ease-out;
}

/* Utility */
.hidden {
  display: none !important;
}