* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f1216;
  color: #e6e9ef;
  margin: 0;
  padding: 24px;
}
h1 { font-weight: 600; margin-bottom: 20px; }
h2.section { font-size: 16px; color: #9aa4b2; margin: 24px 0 12px; font-weight: 600; }
.cards {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.card {
  background: #1a1f27;
  border-radius: 12px;
  padding: 20px 24px;
  min-width: 200px;
  flex: 1;
}
.card.highlight { background: #16321f; border: 1px solid #2f7d4d; }
.card h2 { margin: 0 0 8px; font-size: 15px; color: #9aa4b2; text-transform: uppercase; letter-spacing: 0.05em; }
.card .power { font-size: 32px; font-weight: 700; color: #4ade80; }
.card .energy { font-size: 14px; color: #c3c9d3; margin-top: 4px; }
.card .string1 { font-size: 12px; color: #9aa4b2; margin-top: 4px; }
.card .updated { font-size: 12px; color: #6b7280; margin-top: 8px; }
h3.subsection { font-size: 13px; color: #6b7280; margin: 4px 0 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
.breakdown {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  background: #1a1f27;
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 24px;
}
.breakdown .stat { display: flex; flex-direction: column; min-width: 110px; }
.breakdown .label { font-size: 11px; color: #9aa4b2; text-transform: uppercase; letter-spacing: 0.05em; }
.breakdown .value { font-size: 18px; font-weight: 600; color: #e6e9ef; margin-top: 2px; }
canvas { max-width: 100%; }

.chart-wrapper {
  background: #1a1f27;
  border-radius: 12px;
  padding: 16px;
  height: 320px;
  position: relative;
}
.chart-wrapper-wide { height: 380px; margin-bottom: 24px; }

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 6px 0;
  border-bottom: 1px solid #2a3140;
}
.summary-row:last-child { border-bottom: none; }
.summary-row .label { font-size: 13px; color: #9aa4b2; }
.summary-row .value { font-size: 15px; font-weight: 600; color: #e6e9ef; }

.date-picker-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.date-picker-row label { font-size: 14px; color: #9aa4b2; }
.date-picker-row input, .date-picker-row button,
.add-subscriber-row input, .add-subscriber-row button,
#subscribers-locked input, #subscribers-locked button {
  background: #1a1f27;
  color: #e6e9ef;
  border: 1px solid #2a3140;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
}
.date-picker-row button, .add-subscriber-row button, #subscribers-locked button {
  cursor: pointer;
  background: #2a3140;
}
.date-picker-row button:hover, .add-subscriber-row button:hover, #subscribers-locked button:hover {
  background: #38455c;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.subscribers-box {
  background: #1a1f27;
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 24px;
  max-width: 560px;
}
#subscriber-list { list-style: none; padding: 0; margin: 0 0 12px; }
#subscriber-list li.subscriber-row {
  padding: 10px 0;
  border-bottom: 1px solid #2a3140;
  font-size: 14px;
}
.subscriber-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.subscriber-top-row button {
  background: none;
  border: none;
  color: #f87171;
  cursor: pointer;
  font-size: 13px;
}
.subscriber-categories { display: flex; gap: 14px; flex-wrap: wrap; }
.category-check {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: #9aa4b2;
  cursor: pointer;
}
.add-subscriber-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.add-subscriber-row input[type="email"] { flex: 1; min-width: 180px; }
.error { color: #f87171; font-size: 13px; margin-left: 8px; }