:root {
  --bg: #fafaf7;
  --fg: #222;
  --muted: #777;
  --accent: #5e60ce;
  --card: #fff;
  --border: #e6e3dd;
  --danger: #c1463a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.4;
}
header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}
header h1 { margin: 0; font-size: 1.3rem; }
.logout { font-size: 0.85rem; color: var(--muted); text-decoration: none; }
.logout:hover { color: var(--accent); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1.1rem;
}
.card h2 { margin: 0 0 0.75rem; font-size: 1.05rem; }

.entry-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
}
.entry-form label {
  display: flex;
  flex-direction: column;
  font-size: 0.78rem;
  color: var(--muted);
  gap: 0.2rem;
}
.entry-form label.notes { flex: 1 1 220px; }
.entry-form input {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.4rem 0.5rem;
  font-size: 0.95rem;
  background: #fff;
  color: var(--fg);
}
.entry-form button, .login-card button {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 4px;
  padding: 0.5rem 1.1rem;
  font-size: 0.9rem;
  cursor: pointer;
}
.entry-form button:hover, .login-card button:hover { filter: brightness(0.95); }
.hint { color: var(--muted); font-size: 0.8rem; margin: 0.6rem 0 0; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--border);
}
th {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
tbody tr:hover { background: #f6f3ee; }
button.link {
  background: none;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  font-size: 0.85rem;
}
button.link:hover { color: var(--danger); }
.empty { color: var(--muted); font-style: italic; margin: 0; }

.chart-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  margin-top: 1rem;
}
.chart-box {
  position: relative;
  height: 260px;
}
.chart-box.wide { grid-column: 1 / -1; }

details.collapsible { padding: 0; }
details.collapsible > summary {
  list-style: none;
  cursor: pointer;
  padding: 0.95rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  user-select: none;
  border-radius: 8px;
}
details.collapsible > summary:hover { background: #f6f3ee; }
details.collapsible > summary::-webkit-details-marker { display: none; }
.summary-label {
  font-weight: 600;
  font-size: 1rem;
  color: var(--accent);
}
.summary-chev {
  display: inline-block;
  color: var(--accent);
  font-size: 0.9rem;
  transition: transform 0.15s ease;
}
details[open] > summary .summary-chev { transform: rotate(180deg); }
details.collapsible[open] { padding-bottom: 1rem; }
details.collapsible[open] > summary { padding-bottom: 0.5rem; }
details.collapsible[open] .chart-grid { padding: 0 1.25rem; }

body.login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  width: min(340px, 92vw);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.login-card h1 { margin: 0; font-size: 1.15rem; text-align: center; }
.login-card label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.login-card input {
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 1rem;
}
.error { color: var(--danger); font-size: 0.85rem; margin: 0; text-align: center; }