:root {
  --bg: #ffffff;
  --fg: #000000;
  --grid-gap: 3px;
  --cell-size: 24px;
  --grid-border: 2px;
  --accent: #111111;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg); }
body {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  padding: 32px;
  line-height: 1.2;
}
.title {
  font-size: 28px;
  letter-spacing: 2px;
  font-weight: 800;
  border: var(--grid-border) solid var(--fg);
  padding: 12px 16px;
  display: inline-block;
  margin-bottom: 16px;
}
.meta {
  margin: 8px 0 24px 0;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-size: 12px;
}
.grid {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: var(--grid-gap);
  padding: 8px;
  overflow-x: auto;
  background: #fefefe;
}

.calendar {
  display: grid;
  gap: var(--grid-gap);
  padding: 8px;
  overflow-x: auto;
}
.week {
  display: grid;
  grid-template-rows: repeat(7, var(--cell-size));
  gap: var(--grid-gap);
}
.day {
  width: var(--cell-size);
  height: var(--cell-size);
  cursor: crosshair;
  position: relative;
}
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 9998;
}
.confetti-container.confetti-fade {
  opacity: 0;
  transition: opacity 0.8s ease-out;
}
.confetti-piece {
  position: absolute;
  top: -12px;
  width: 10px;
  height: 18px;
  opacity: 0;
  border-radius: 2px;
  animation-name: confetti-fall;
  animation-timing-function: linear;
  animation-fill-mode: forwards;
  will-change: transform, opacity;
}
.confetti-piece:nth-child(3n) { width: 7px; height: 16px; }
.confetti-piece:nth-child(5n) { width: 12px; height: 12px; border-radius: 50%; }
.confetti-piece:nth-child(7n) { width: 16px; height: 8px; border-radius: 0; }
.charts {
  margin-top: 32px;
  display: grid;
  gap: 24px;
  grid-auto-flow: row;
}
.chart {
  border: var(--grid-border) solid var(--fg);
  padding: 16px;
  background: var(--bg);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.1);
}
.chart-title {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  font-weight: 700;
}
.chart svg {
  width: 100%;
  height: auto;
  display: block;
  color: var(--fg);
}
.chart-line {
  fill: none;
  stroke: var(--fg);
  stroke-width: 2.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.chart-area {
  fill: var(--accent);
  opacity: 0.18;
}
.chart-point {
  fill: var(--bg);
  stroke: var(--fg);
  stroke-width: 2;
}
.chart-axis {
  stroke: var(--fg);
  stroke-width: 1.5;
}
.chart-grid {
  stroke: var(--fg);
  stroke-width: 0.75;
  stroke-dasharray: 4 4;
  opacity: 0.35;
}
.chart-label {
  fill: var(--fg);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.chart-label--y {
  opacity: 0.7;
}
.chart-label--x {
  opacity: 0.7;
}
.chart-bar {
  fill: var(--accent);
  opacity: 0.85;
}
.chart-meta {
  margin-top: 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.chart-meta--muted {
  opacity: 0.6;
}
.chart-empty {
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.6;
  border: 2px dashed currentColor;
}
.long-runs {
  margin-top: 32px;
  border: var(--grid-border) solid var(--fg);
  padding: 16px;
  background: var(--bg);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.1);
}
.long-runs-title {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  font-weight: 700;
}
.long-run-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.long-run-entry {
  display: grid;
  grid-template-columns: minmax(120px, 160px) 1fr;
  align-items: baseline;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.long-run-entry__month {
  font-weight: 700;
}
.long-run-entry__details {
  opacity: 0.8;
}
.long-run-empty {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.6;
}
.races {
  margin-top: 32px;
  border: var(--grid-border) solid var(--fg);
  padding: 16px;
  background: var(--bg);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.1);
}
.races-title {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  font-weight: 700;
}
.races-list {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.race-card {
  border: 2px solid var(--fg);
  background: var(--bg);
  padding: 12px;
  display: grid;
  gap: 8px;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.race-card.race-upcoming:hover {
  border-color: #1a202c;
}
.race-card.race-completed {
  border-color: #2f855a;
  background: rgba(47, 133, 90, 0.12);
}
.race-card.race-awaiting-result {
  border-style: dashed;
  border-color: #b7791f;
  background: rgba(183, 121, 31, 0.1);
}
.race-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.race-date {
  font-weight: 600;
}
.race-status {
  font-weight: 700;
}
.race-card.race-completed .race-status { color: #2f855a; }
.race-card.race-awaiting-result .race-status { color: #b7791f; }
.race-card.race-upcoming .race-status { color: #1a202c; }
.race-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.race-name a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.race-name a:hover {
  border-bottom-color: currentColor;
}
.race-meta,
.race-time,
.race-notes {
  font-size: 12px;
  letter-spacing: 0.5px;
}
.race-notes {
  opacity: 0.85;
}
.race-time .race-label {
  font-weight: 600;
  text-transform: uppercase;
  margin-right: 6px;
}
.race-time .race-value {
  font-family: inherit;
}
.race-time--pending .race-value {
  opacity: 0.6;
  font-style: italic;
}
@keyframes confetti-fall {
  0% {
    transform: translate3d(0, -20vh, 0) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  100% {
    transform: translate3d(var(--drift), 110vh, 0) rotate(var(--rotation));
    opacity: 0;
  }
}
.legend {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-size: 12px;
  text-transform: uppercase;
}
.legend .swatch { width: 20px; height: 20px; border: 1px solid #111; display: inline-block; }
.months {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: var(--grid-gap);
  font-size: 10px;
  margin: 6px 0 2px 8px;
  letter-spacing: 1px;
}
.month { width: calc(var(--cell-size) + var(--grid-gap)); opacity: 0.8; }
.tooltip { position: fixed; display: none; pointer-events: none; z-index: 9999; background: #ffffff; color: #000; border: 2px solid #000; padding: 8px 10px; font-size: 12px; max-width: 280px; box-shadow: 6px 6px 0 #000; }
.tooltip .tt-title { font-weight: 800; letter-spacing: 1px; margin-bottom: 4px; }
.tooltip .tt-total { margin-bottom: 6px; opacity: 0.9; }
.tooltip .tt-list div { border-top: 1px dashed #000; padding-top: 4px; margin-top: 4px; }

@media (min-width: 900px) {
  .charts {
    grid-template-columns: repeat(2, minmax(280px, 1fr));
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0c10;
    --fg: #e5e7eb;
    --accent: #94a3b8;
  }

  .grid { background: #0f1115; }
  .legend .swatch { border: 1px solid #e5e7eb; }

  .chart {
    box-shadow: 6px 6px 0 rgba(255, 255, 255, 0.06);
  }
  .chart-area {
    opacity: 0.28;
  }
  .chart-bar {
    opacity: 0.7;
  }
  .chart-empty {
    border-color: rgba(229, 231, 235, 0.4);
  }
  .long-runs {
    box-shadow: 6px 6px 0 rgba(255, 255, 255, 0.06);
  }
  .tooltip {
    background: #0f1115;
    color: #e5e7eb;
    border: 2px solid #e5e7eb;
    box-shadow: 6px 6px 0 rgba(255, 255, 255, 0.15);
  }
  .tooltip .tt-list div { border-top: 1px dashed rgba(229, 231, 235, 0.4); }

  /* Invert cell colors in dark mode so higher km look lighter and 0 km is dark */
  .calendar .day { filter: invert(1); }
  .legend .swatch { filter: invert(1); }

  /* Future days: keep hidden (no invert) and disable interactions */
  .day.future { background: var(--bg) !important; filter: none !important; pointer-events: none; }
  .races {
    box-shadow: 6px 6px 0 rgba(255, 255, 255, 0.06);
  }
  .race-card {
    border-color: rgba(229, 231, 235, 0.4);
    background: rgba(15, 17, 21, 0.8);
  }
  .race-card.race-upcoming:hover {
    border-color: rgba(148, 163, 184, 0.8);
  }
  .race-card.race-completed {
    border-color: #68d391;
    background: rgba(104, 211, 145, 0.16);
  }
  .race-card.race-awaiting-result {
    border-color: #f6ad55;
    background: rgba(246, 173, 85, 0.16);
  }
  .race-card.race-upcoming .race-status { color: #cbd5f5; }
  .race-card.race-awaiting-result .race-status { color: #fbd38d; }
  .race-card.race-completed .race-status { color: #68d391; }
}