:root {
  color-scheme: light;
  --base3: #fdf6e3;
  --base2: #eee8d5;
  --base1: #93a1a1;
  --base0: #839496;
  --base00: #657b83;
  --base01: #586e75;
  --blue: #268bd2;
  --green: #859900;
  --red: #dc322f;
  --orange: #cb4b16;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--base3);
  color: var(--base00);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

main {
  width: min(46rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 4rem;
}

a { color: var(--blue); text-underline-offset: .16em; }
a:hover { text-decoration-thickness: 2px; }
h1 { color: var(--base01); font-size: 1.75rem; line-height: 1.2; margin: 1.5rem 0 1rem; }
h2 { color: var(--base01); font-size: 1.15rem; margin: 2rem 0 .5rem; }
p { margin: .7rem 0; }
small, .deadline { color: var(--base0); }

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: .65rem;
  border-bottom: 1px solid var(--base2);
  white-space: nowrap;
  overflow-x: auto;
}

.navlinks { text-align: right; }
.inline { display: inline; }
.link-button {
  appearance: none;
  border: 0;
  padding: 0;
  background: none;
  color: var(--blue);
  font: inherit;
  text-decoration: underline;
  text-underline-offset: .16em;
  cursor: pointer;
}

.plain-list { padding-left: 1.25rem; }
.plain-list li { margin: .4rem 0; }

table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
th, td { padding: .55rem .4rem; border-bottom: 1px solid var(--base2); text-align: left; vertical-align: top; }
th { color: var(--base01); font-size: .85rem; font-weight: 650; }

input, button, select { font: inherit; }
input[type="text"], input[type="search"], input[type="password"], input[type="number"], select {
  max-width: 20rem;
  padding: .35rem .45rem;
  border: 1px solid var(--base1);
  border-radius: 2px;
  background: #fffdf5;
  color: var(--base01);
}
button:not(.link-button) {
  padding: .38rem .7rem;
  border: 1px solid var(--blue);
  border-radius: 2px;
  background: var(--blue);
  color: var(--base3);
  cursor: pointer;
}
button:hover:not(.link-button) { filter: brightness(.92); }

.table-filters {
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) repeat(3, auto);
  align-items: end;
  gap: .65rem;
  padding: .75rem 0;
  border-block: 1px solid var(--base2);
}
.table-filters label { display: grid; gap: .2rem; color: var(--base01); font-size: .85rem; font-weight: 650; }
.table-filters input, .table-filters select { width: 100%; font-weight: 400; }
.filter-actions { display: flex; align-items: center; gap: .55rem; grid-column: 1 / -1; }
.table-summary { margin-bottom: 0; color: var(--base0); font-size: .9rem; }
.table-scroll { overflow-x: auto; }
.question-table { min-width: 46rem; }
.sort-link { color: inherit; white-space: nowrap; }
.question-status { white-space: nowrap; }
.tournament-tabs { display: flex; gap: 1.25rem; margin-bottom: 1rem; border-bottom: 1px solid var(--base2); }
.tournament-tabs a { padding: .5rem .1rem; text-decoration: none; border-bottom: 2px solid transparent; }
.tournament-tabs a[aria-current="page"] { color: var(--base01); border-color: var(--blue); font-weight: 650; }
.leaderboard-table { font-variant-numeric: tabular-nums; }
.leaderboard-table th { white-space: nowrap; }
.leaderboard-table .own-score { background: var(--base2); }

.question-navigation {
  position: sticky;
  top: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: .35rem 1rem;
  padding: .55rem 0;
  border-block: 1px solid var(--base2);
  background: var(--base3);
  background: color-mix(in srgb, var(--base3) 94%, transparent);
  backdrop-filter: blur(4px);
}
.next-question { text-align: right; }
.question-position, .navigation-hint { color: var(--base01); }
.question-position { font-size: .9rem; }
.navigation-hint { grid-column: 1 / -1; text-align: center; }
.disabled-navigation { color: var(--base1); }
kbd {
  padding: 0 .3rem;
  border: 1px solid var(--base1);
  border-radius: 2px;
  background: var(--base2);
  color: var(--base01);
  font: inherit;
  font-size: .8rem;
}

.forecast-control { display: flex; align-items: center; gap: .65rem; margin: .5rem 0; }
.forecast-control input[type="range"] { flex: 1; accent-color: var(--blue); }
.forecast-control input[type="number"] { width: 4.5rem; }
.saving-label { display: none; }
.forecast-form.htmx-request .save-label { display: none; }
.forecast-form.htmx-request .saving-label { display: inline; }
.forecast-form.htmx-request button { cursor: wait; opacity: .72; }
.forecast-update { padding-left: 0; }
.forecast-update.is-saved { animation: forecast-saved-panel 1.1s ease-out; }
.forecast-confirmation {
  margin: .65rem 0;
  padding: .45rem .65rem;
  border-left: 3px solid var(--green);
  background: color-mix(in srgb, var(--green) 10%, var(--base3));
  color: var(--green);
  animation: forecast-confirmation-in .32s ease-out both;
}
.forecast-current { color: var(--base01); }
.forecast-current.is-updated { display: inline-block; animation: forecast-value-pop .42s ease-out .08s both; }
.stats { padding: .65rem 0; border-bottom: 1px solid var(--base2); }

.community-chart { margin: 1.5rem 0; font-variant-numeric: tabular-nums; }
.community-chart-heading { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem; margin-bottom: 1.75rem; }
.community-chart-heading strong { color: var(--base01); font-size: .95rem; }
.chart-ranges { display: flex; gap: .2rem; }
.chart-ranges button { padding: .25rem .5rem; border: 0; color: var(--base00); background: transparent; font-size: .85rem; }
.chart-ranges button[aria-pressed="true"] { background: var(--base2); color: var(--base01); }
.chart-ranges button:hover { background: var(--base2); }
.community-plot { display: grid; grid-template-columns: minmax(0, 1fr) 3rem; gap: .75rem; }
.community-chart [hidden] { display: none; }
.chart-surface { position: relative; height: 13rem; cursor: crosshair; touch-action: pan-y; }
.chart-surface:focus-visible { outline: 2px solid var(--blue); outline-offset: 6px; }
.chart-surface svg { width: 100%; height: 100%; overflow: visible; display: block; }
.chart-grid path { fill: none; stroke: var(--base1); stroke-opacity: .55; stroke-dasharray: 3 5; stroke-width: 1; vector-effect: non-scaling-stroke; }
.chart-line { fill: none; stroke: var(--green); stroke-width: 2.5; vector-effect: non-scaling-stroke; }
.chart-crosshair { stroke: var(--base0); stroke-dasharray: 3 4; stroke-width: 1; vector-effect: non-scaling-stroke; }
.chart-tooltip { position: absolute; transform: translate(-50%, -50%); padding: .1rem .4rem; border-radius: 3px; background: var(--base01); color: var(--base3); font-weight: 700; pointer-events: none; }
.chart-scale { display: flex; flex-direction: column; justify-content: space-between; height: 13rem; font-size: .8rem; text-align: right; position: relative; }
.chart-scale span { height: 0; display: flex; align-items: center; justify-content: flex-end; }
.chart-dates { display: flex; justify-content: space-between; gap: .25rem; font-size: .75rem; color: var(--base00); }
.chart-readout { min-height: 1.5em; margin-top: 1rem; color: var(--base01); font-size: .85rem; }
.community-chart > small { font-size: .75rem; }

.problem { padding: .45rem 0 1rem; border-bottom: 1px solid var(--base2); }
.problem form { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; }
.saved, .correct { color: var(--green); }
.incorrect, .errorlist { color: var(--red); }
.errorlist { margin: .25rem 0; }
.message { border-left: 3px solid var(--blue); padding-left: .65rem; }
.description { overflow-wrap: anywhere; }
details { margin-top: 1rem; }
summary { color: var(--blue); cursor: pointer; }

@keyframes forecast-saved-panel {
  0% { box-shadow: inset 4px 0 var(--green); background: color-mix(in srgb, var(--green) 13%, transparent); }
  65% { box-shadow: inset 4px 0 color-mix(in srgb, var(--green) 45%, transparent); }
  100% { box-shadow: inset 0 0 transparent; background: transparent; }
}

@keyframes forecast-confirmation-in {
  from { opacity: 0; transform: translateY(-.35rem); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes forecast-value-pop {
  0% { color: var(--green); transform: scale(.82); }
  65% { color: var(--green); transform: scale(1.12); }
  100% { color: var(--base01); transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .forecast-update.is-saved,
  .forecast-confirmation,
  .forecast-current.is-updated { animation: none; }
}

@media (max-width: 38rem) {
  .topbar { display: block; white-space: normal; }
  .navlinks { display: block; text-align: left; margin-top: .25rem; }
  .forecast-control { align-items: stretch; flex-wrap: wrap; }
  .forecast-control input[type="range"] { flex-basis: 100%; }
  .table-filters { grid-template-columns: 1fr; }
  .filter-actions { grid-column: 1; }
  .question-navigation { gap: .25rem .5rem; }
  .navigation-hint { text-align: left; }
  table { font-size: .9rem; }
}

.resolution-details { margin-block: 1.5rem; padding: 1rem; border: 1px solid #bbb; border-radius: .5rem; overflow-wrap: anywhere; }
.resolution-details h2 { margin-top: 0; }

/* Compact tournament progress sits inside the course top bar. */
.topbar:has(.tournament-summary) { flex-wrap: wrap; white-space: normal; overflow: visible; gap: .55rem 1rem; }
.tournament-summary { flex: 1 0 100%; display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1.25rem; padding-top: .5rem; border-top: 1px solid var(--base2); font-size: .75rem; font-variant-numeric: tabular-nums; }
.tournament-metric { display: grid; grid-template-columns: auto auto; gap: 0 .5rem; }
.tournament-metric strong { color: var(--base01); }
.tournament-metric small { grid-column: 1 / -1; font-size: .7rem; }
.tournament-participation { margin-left: auto; max-width: 100%; }
.participation-weeks { display: flex; flex-wrap: wrap; gap: .55rem; }
.participation-week { display: grid; grid-template-columns: auto auto; align-items: center; justify-content: center; gap: .1rem .2rem; }
.participation-dates { grid-column: 1 / -1; padding: .12rem .3rem; border: 1px solid #c4c4c4; border-radius: 3px; color: var(--base00); background: rgb(128 128 128 / 4%); font-size: .6rem; white-space: nowrap; }
.participation-count { grid-column: 1 / -1; text-align: center; font-size: .65rem; }
.participation-check { display: inline-flex; align-items: center; justify-content: center; width: .85rem; height: .85rem; border: 1px solid var(--base1); border-radius: 2px; line-height: 1; }
.participation-week.is-complete { color: #526700; }
.is-complete .participation-check { background: #526700; border-color: #526700; color: white; }
.participation-met { color: #526700; }
.tournament-score-help { flex-basis: 100%; font-size: .7rem; }
.tournament-score-help summary { cursor: pointer; color: var(--base00); }
.tournament-score-help p { max-width: 65ch; }
@media (max-width: 540px) {
  .tournament-participation { margin-left: 0; flex-basis: 100%; }
  .participation-weeks { gap: .5rem; flex-wrap: wrap; }
}