:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2128;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #2f81f7;
  --danger: #f85149;
  --border: #30363d;
  --h0: #161b22;
  --h1: #0e4429;
  --h2: #006d32;
  --h3: #26a641;
  --h4: #39d353;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  padding: 32px 24px 8px;
  max-width: 900px;
  margin: 0 auto;
}
header h1 { margin: 0 0 4px; font-size: 28px; }
header .sub { margin: 0; color: var(--muted); font-size: 14px; }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px 24px 64px;
}

.add { margin: 16px 0 24px; }
.add form { display: flex; gap: 8px; }
.add input {
  flex: 1;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 15px;
}
.add input:focus { outline: none; border-color: var(--accent); }
.add button, .actions button {
  background: var(--accent);
  color: white;
  border: 0;
  border-radius: 6px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.add button:hover, .actions .tick:hover { filter: brightness(1.1); }
.err { color: var(--danger); font-size: 13px; margin-top: 8px; min-height: 18px; }

.phrase {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}
.phrase .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.phrase .text {
  margin: 0;
  font-size: 18px;
  word-break: break-word;
}
.phrase .total {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}
.phrase .total .count {
  color: var(--text);
  font-weight: 700;
  font-size: 16px;
}
.actions { display: flex; gap: 8px; flex-shrink: 0; }
.actions .delete {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 12px;
}
.actions .delete:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.heatmap {
  overflow-x: auto;
  padding-top: 4px;
}
.heatmap svg { display: block; }
.heatmap rect { shape-rendering: crispEdges; }
.heatmap rect:hover { stroke: var(--text); stroke-width: 1; }
.heatmap .month-label { fill: var(--muted); font-size: 10px; }

footer {
  text-align: center;
  color: var(--muted);
  padding: 16px;
}