/* === Reset / base === */
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  color: #1c1c1c;
  background: #f4f6f9;
  line-height: 1.5;
}
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5em;
}
a { color: #2a5fa0; text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { color: #0f1e3a; margin: 0; }

/* === Header === */
.site-header {
  background: linear-gradient(135deg, #1a2540 0%, #2a5fa0 100%);
  color: #fff;
  padding: 2em 0 1.6em;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.site-header h1 { color: #fff; font-size: 2em; }
.site-header .tagline { color: #c8d6ec; margin: 0.25em 0 0; font-size: 0.95em; }

/* === Tabs === */
.tabs {
  display: flex;
  gap: 0.5em;
  padding-top: 1em;
  flex-wrap: wrap;
}
.tab-btn {
  background: #fff;
  border: 1px solid #d6dce5;
  color: #2a3b5c;
  padding: 0.6em 1.2em;
  border-radius: 6px;
  font-size: 0.95em;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  transition: background 0.15s ease, transform 0.1s ease;
}
.tab-btn:hover { background: #eef3fa; transform: translateY(-1px); text-decoration: none; }
.tab-btn.active {
  background: #2a5fa0;
  color: #fff;
  border-color: #2a5fa0;
}
.tab-btn.external { background: #fff7ec; border-color: #ecd99b; color: #6c5410; }
.tab-btn.external:hover { background: #fdebc6; }

/* === Main / sections === */
main { padding: 1.5em 0 4em; }
.tab-section { display: none; }
.tab-section.active { display: block; }

/* === Stats grid === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1em;
  margin: 0.5em 0 2em;
}
.stat-card {
  background: #fff;
  border-radius: 8px;
  padding: 1.1em 1.2em;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  border-left: 4px solid #2a5fa0;
}
.stat-card .label {
  font-size: 0.78em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #6c7a93;
  font-weight: 600;
}
.stat-card .value {
  font-size: 1.7em;
  font-weight: 700;
  color: #0f1e3a;
  margin-top: 0.25em;
  font-variant-numeric: tabular-nums;
}
.stat-card .value.positive { color: #1f8a5c; }
.stat-card .value.negative { color: #c14242; }
.stat-card .sub {
  color: #6c7a93;
  font-size: 0.8em;
  margin-top: 0.35em;
}

/* === Section blocks === */
section.chart-block, section.open-block,
section.closed-block, section.latest-block {
  background: #fff;
  border-radius: 8px;
  padding: 1.4em 1.6em;
  margin: 1.2em 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
section h2 {
  font-size: 1.2em;
  margin-bottom: 0.6em;
  border-bottom: 1px solid #e0e4ea;
  padding-bottom: 0.3em;
}
.sub { color: #6c7a93; font-size: 0.85em; }

/* Fixed-height wrapper so the responsive chart can't grow unbounded.
   Chart.js with maintainAspectRatio:false sizes the canvas to its parent;
   the parent must have an explicit height or the canvas grows on each resize. */
.chart-wrap {
  position: relative;
  height: 340px;
  margin-top: 0.4em;
}

/* === Open portfolios === */
#open-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7em;
  margin-top: 0.8em;
}
.open-card {
  border: 1px solid #e0e4ea;
  border-left: 4px solid #2a5fa0;
  border-radius: 6px;
  padding: 0.85em 1em;
}
.open-card .head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.8em;
  margin-bottom: 0.4em;
}
.open-card .head .date { font-weight: 700; color: #0f1e3a; }
.open-card .head .days {
  background: #eef1f6;
  color: #2a3b5c;
  padding: 0.1em 0.55em;
  border-radius: 12px;
  font-size: 0.8em;
}
.open-card .head .return {
  margin-left: auto;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 1.15em;
}
.open-card .head .return.positive { color: #1f8a5c; }
.open-card .head .return.negative { color: #c14242; }
.open-card .legs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1em;
  margin-top: 0.4em;
  font-size: 0.88em;
}
.open-card .leg-label {
  font-size: 0.78em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #6c7a93;
  font-weight: 600;
  margin-bottom: 0.2em;
}
.open-card .leg-label .leg-note {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  color: #8a96ab;
  margin-left: 0.4em;
}
.open-card .leg .pos {
  display: flex;
  justify-content: space-between;
  padding: 0.1em 0;
  color: #2a3b5c;
}
.open-card .leg .pos .ret {
  font-variant-numeric: tabular-nums;
}
.open-card .leg .pos .ret.positive { color: #1f8a5c; }
.open-card .leg .pos .ret.negative { color: #c14242; }
.open-card .report-link { font-size: 0.85em; margin-top: 0.5em; display: block; }

/* === Closed table === */
#closed-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.6em;
  font-size: 0.92em;
}
#closed-table th, #closed-table td {
  padding: 0.45em 0.7em;
  border-bottom: 1px solid #e0e4ea;
  text-align: left;
}
#closed-table th { background: #eef1f6; color: #2a3b5c; font-weight: 600; }
#closed-table td.num, #closed-table th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
#closed-table td.positive { color: #1f8a5c; font-weight: 600; }
#closed-table td.negative { color: #c14242; font-weight: 600; }

/* === All reports (folded by year/month) === */
.all-reports-title {
  font-size: 1em;
  margin: 1em 0 0.5em;
  color: #2a3b5c;
}
#all-reports details {
  border: 1px solid #e0e4ea;
  border-radius: 6px;
  margin: 0.35em 0;
  background: #fafbfd;
}
#all-reports details[open] { background: #fff; }
#all-reports summary {
  cursor: pointer;
  padding: 0.45em 0.7em;
  font-weight: 600;
  color: #2a3b5c;
  list-style: none;
  user-select: none;
}
#all-reports summary::-webkit-details-marker { display: none; }
#all-reports summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 0.4em;
  font-size: 0.8em;
  color: #6c7a93;
  transition: transform 0.15s ease;
}
#all-reports details[open] > summary::before { transform: rotate(90deg); }
#all-reports .count {
  color: #6c7a93;
  font-weight: 400;
  font-size: 0.85em;
  margin-left: 0.3em;
}
.report-year-body { padding: 0 0.6em 0.5em 1.2em; }
.report-month .report-list {
  list-style: none;
  margin: 0;
  padding: 0.1em 0 0.4em 1.8em;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.15em 0.6em;
  font-variant-numeric: tabular-nums;
  font-size: 0.92em;
}
.report-month .report-list a { display: inline-block; padding: 0.1em 0; }

/* === Footer === */
.site-footer {
  background: #1a2540;
  color: #c8d6ec;
  padding: 1.4em 0;
  margin-top: 3em;
  font-size: 0.85em;
}
.site-footer a { color: #93b8e3; }