/* Layout: Kattis chrome (gold stripe + dark navbar); search panel across the top; filter panel left (drawer on phones), result panel right.
   Palette and fonts follow open.kattis.com / speedrun.progolymp.se. */
:root {
  --gold: #ffbe00;
  --paw: #ff5a24;
  --gold-pale: #fff7e0;
  --green: #39a137;
  --green-hover: #59b057;
  --red: #ff411a;
  --link: #355591;
  --text: #1c1c1c;
  --head: #222222;
  --muted: #666666;
  --border: #e3e3ea;
  --field: #cacaca;
  --panel: #ffffff;
  --panel-alt: #fafafb;
  --th: #f3f3f9;
  --nav: #2b2b32;
  --nav-text: #ffffff;
  --bg-start: #f1f2fc;
  --bg-end: #f7f7f7;
  --chip: #f3f3f9;
  --chip-on: #fff2c2;
  --easy-bg: #39a137; --easy-fg: #ffffff;
  --med-bg: #ffbe00; --med-fg: #1c1c1c;
  --hard-bg: #ff411a; --hard-fg: #ffffff;
  --off: #e3e3ea;
  --po-bg: #fff2c2; --po-fg: #7a5600;
  --radius: 8px;
  --sans: "Ubuntu", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --serif: "Merriweather", Georgia, "Times New Roman", serif;
  --mono: "Ubuntu Mono", ui-monospace, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --gold-pale: #2f2a1a; --link: #8fb0ee; --text: #e4e4ea; --head: #f0f0f4; --muted: #a0a0ab;
    --border: #34343e; --field: #4a4a55; --panel: #1f1f25; --panel-alt: #23232a; --th: #2a2a32;
    --nav: #16161a; --bg-start: #18181d; --bg-end: #131316; --chip: #2a2a32; --chip-on: #3d3518;
    --med-fg: #1c1c1c; --off: #3a3a44; --po-bg: #3d3518; --po-fg: #ffd25a; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --gold-pale: #2f2a1a; --link: #8fb0ee; --text: #e4e4ea; --head: #f0f0f4; --muted: #a0a0ab;
  --border: #34343e; --field: #4a4a55; --panel: #1f1f25; --panel-alt: #23232a; --th: #2a2a32;
  --nav: #16161a; --bg-start: #18181d; --bg-end: #131316; --chip: #2a2a32; --chip-on: #3d3518;
  --med-fg: #1c1c1c; --off: #3a3a44; --po-bg: #3d3518; --po-fg: #ffd25a; color-scheme: dark;
}
html { height: 100%; }
* { box-sizing: border-box; }
body { margin: 0; }
[hidden] { display: none !important; }
body {
  min-height: 100%; border-top: 7px solid var(--gold);
  background: var(--bg-end) linear-gradient(143deg, var(--bg-start) 22%, var(--bg-end) 75%) fixed;
  color: var(--text); font: 16px/1.5 var(--sans);
}
h1, h2, h3 { font-family: var(--serif); color: var(--head); font-weight: 700; line-height: 1.25; text-wrap: balance; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

nav.navbar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--nav); box-shadow: 0 2px 6px rgba(0, 0, 0, .12); }
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0 16px; display: flex; align-items: center; gap: 2px; }
.brand { display: flex; align-items: center; gap: 8px; color: var(--nav-text); font: 700 22px/1 var(--serif); padding: 12px 18px 12px 0; letter-spacing: -.01em; }
.brand:hover { text-decoration: none; color: var(--gold); }
.brand svg { color: var(--paw); }
.navlink { color: var(--nav-text); font-weight: 500; padding: 16px; border-bottom: 3px solid transparent; transition: color .15s, border-color .15s; }
.navlink:hover, .navlink.on { color: var(--gold); text-decoration: none; border-bottom-color: var(--gold); }
.filters-btn { display: none; }

.wrap { max-width: 1200px; margin: 0 auto; padding-inline: 16px; padding-block: 24px 48px; display: flex; flex-direction: column; gap: 20px; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 1px 3px rgba(0, 0, 0, .06); }

.search-panel { padding: 20px 24px; display: flex; flex-direction: column; gap: 10px; }
.search-panel h1 { margin: 0; font-size: 1.4rem; }
.search-panel .lede { margin: 0; color: var(--muted); font-size: 15px; }
form.search { display: flex; gap: 10px; align-items: center; }
form.search input { flex: 1; min-width: 0; font-size: 1.05rem; padding: 10px 14px; border: 1px solid var(--field); border-radius: 6px; background: var(--panel); outline: none; }
form.search input:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(57, 161, 55, .15); }
.btn { border: 0; cursor: pointer; background: var(--green); color: #fff; border-radius: 20.5px; padding: 10px 28px; font-weight: 500; line-height: 1.33; transition: background-color .15s; }
.btn:hover { background: var(--green-hover); }
.try { display: flex; gap: 6px 10px; flex-wrap: wrap; align-items: center; font-size: 14px; color: var(--muted); }
.try button { border: 0; background: none; padding: 0; color: var(--link); cursor: pointer; font-size: 14px; }
.try button:hover { text-decoration: underline; }

.cols { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 20px; align-items: start; }

aside.side { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 74px); max-height: calc(100vh - 96px); overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 20px; }
.side h3 { margin: 0 0 8px; font-size: 15px; }
.diff-vals { display: flex; justify-content: space-between; font: 15px var(--mono); font-variant-numeric: tabular-nums; margin-bottom: 2px; }
.range { position: relative; height: 26px; }
.range .track { position: absolute; left: 0; right: 0; top: 11px; height: 4px; border-radius: 2px; background: var(--off); }
.range .fill { position: absolute; top: 11px; height: 4px; border-radius: 2px; background: var(--green); }
.range input { position: absolute; inset: 0; width: 100%; margin: 0; background: none; pointer-events: none; -webkit-appearance: none; appearance: none; }
.range input::-webkit-slider-thumb { -webkit-appearance: none; pointer-events: auto; width: 18px; height: 18px; border-radius: 50%; background: var(--panel); border: 2px solid var(--green); cursor: pointer; }
.range input::-moz-range-thumb { pointer-events: auto; width: 14px; height: 14px; border-radius: 50%; background: var(--panel); border: 2px solid var(--green); cursor: pointer; }
.presets { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.presets button { border: 1px solid var(--border); background: var(--th); border-radius: 20px; padding: 2px 11px; font-size: 13px; cursor: pointer; }
.presets button:hover { background: var(--gold-pale); border-color: var(--gold); }
.check { display: flex; align-items: center; gap: 8px; padding: 3px 0; cursor: pointer; font-size: 15px; }
.check input { accent-color: var(--green); margin: 0; width: 15px; height: 15px; }
.check .n { margin-left: auto; color: var(--muted); font: 14px var(--mono); font-variant-numeric: tabular-nums; }
.check .tag { font: 15px var(--mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.more { border: 0; background: none; color: var(--link); padding: 4px 0; cursor: pointer; font-size: 14px; }
.more:hover { text-decoration: underline; }

main { min-width: 0; display: flex; flex-direction: column; gap: 12px; }
.summary { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.summary strong { color: var(--text); }
.active { display: flex; gap: 6px; flex-wrap: wrap; }
.active button { display: inline-flex; align-items: center; gap: 4px; border: 1px solid var(--gold); border-radius: 20px; padding: 1px 6px 1px 10px; background: var(--gold-pale); font: 14px var(--mono); cursor: pointer; }
.active button::after { content: "×"; font: 16px/1 var(--sans); padding: 0 2px; color: var(--muted); }
.similar-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.similar-head h2 { margin: 0; font-size: 1.25rem; }
.back { border: 1px solid var(--border); background: var(--th); border-radius: 20px; padding: 4px 14px; cursor: pointer; font-size: 14px; }
.back:hover { background: var(--gold-pale); border-color: var(--gold); }

.list-head { display: grid; grid-template-columns: minmax(0, 1fr) 110px; gap: 16px; padding: 10px 16px; background: var(--th); border-bottom: 2px solid var(--border); font-weight: 700; font-size: 14px; color: var(--head); border-radius: var(--radius) var(--radius) 0 0; }
.list-head span:last-child { text-align: right; }
ol.results { list-style: none; margin: 0; padding: 0; }
.res { padding: 14px 16px; display: grid; grid-template-columns: minmax(0, 1fr) 110px; gap: 5px 16px; border-top: 1px solid var(--border); transition: background-color .1s; }
.res:first-child { border-top: 0; }
.res:nth-child(even) { background: var(--panel-alt); }
.res:hover { background: var(--gold-pale); }
.res:last-child { border-radius: 0 0 var(--radius) var(--radius); }
.res .head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; min-width: 0; }
.res .title { font-weight: 700; font-size: 17px; color: var(--link); }
.res .slug { font: 14px var(--mono); color: var(--muted); }
.badge { font: 700 11px/1 var(--sans); letter-spacing: .05em; text-transform: uppercase; padding: 3px 7px; border-radius: 10px; }
.badge.po { background: var(--po-bg); color: var(--po-fg); }
.badge.int { background: var(--chip); color: var(--muted); border: 1px solid var(--border); }
.diff { grid-row: 1 / span 2; grid-column: 2; display: flex; flex-direction: column; align-items: flex-end; gap: 5px; }
.diff .num { font: 700 14px var(--sans); font-variant-numeric: tabular-nums; padding: 3px 10px; border-radius: 20px; white-space: nowrap; }
.diff .bar { display: flex; gap: 2px; }
.diff .bar i { width: 6px; height: 8px; border-radius: 1px; background: var(--off); }
.d-easy .num { background: var(--easy-bg); color: var(--easy-fg); } .d-easy .bar i.on { background: var(--easy-bg); }
.d-med .num { background: var(--med-bg); color: var(--med-fg); } .d-med .bar i.on { background: var(--med-bg); }
.d-hard .num { background: var(--hard-bg); color: var(--hard-fg); } .d-hard .bar i.on { background: var(--hard-bg); }
.tags { display: flex; gap: 5px; flex-wrap: wrap; grid-column: 1; }
.tags button { border: 1px solid var(--border); background: var(--chip); color: var(--text); border-radius: 4px; padding: 0 7px; font: 14px/1.5 var(--mono); cursor: pointer; }
.tags button:hover { border-color: var(--gold); background: var(--gold-pale); }
.tags button.on { background: var(--chip-on); border-color: var(--gold); }
.good { grid-column: 1 / -1; margin: 3px 0 0; max-width: 75ch; font-size: 15px; }
.good b { color: var(--muted); font-weight: 500; }
.actions { grid-column: 1 / -1; display: flex; gap: 18px; font-size: 14px; }
.actions button { border: 0; background: none; padding: 0; color: var(--link); cursor: pointer; font-size: 14px; }
.actions button:hover { text-decoration: underline; }

.empty { padding: 24px; }
.empty h2 { margin: 0 0 6px; font-size: 1.1rem; }
.empty p { margin: 0; color: var(--muted); }
.examples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.examples button { border: 1px solid var(--border); background: var(--th); border-radius: 20px; padding: 4px 14px; cursor: pointer; font-size: 14px; }
.examples button:hover { background: var(--gold-pale); border-color: var(--gold); }
footer.about { color: var(--muted); font-size: 13px; max-width: 80ch; margin-top: 8px; }

.scrim { display: none; }
@media (max-width: 820px) {
  .navlink { display: none; }
  .filters-btn { display: inline-block; margin-left: auto; padding: 6px 16px; font-size: 14px; }
  .search-panel { padding: 16px; }
  form.search .btn { padding: 10px 18px; }
  .cols { grid-template-columns: minmax(0, 1fr); }
  aside.side { position: fixed; top: 0; bottom: 0; left: 0; width: min(300px, 86vw); max-height: none; z-index: 40; border-radius: 0; padding-top: calc(env(safe-area-inset-top, 0px) + 18px); transform: translateX(-105%); transition: transform .2s; }
  body.drawer aside.side { transform: none; }
  body.drawer .scrim { display: block; position: fixed; inset: 0; z-index: 30; background: rgba(0, 0, 0, .4); }
  .list-head { display: none; }
  .res { grid-template-columns: minmax(0, 1fr); }
  .res:first-child { border-radius: var(--radius) var(--radius) 0 0; }
  .diff { grid-row: auto; grid-column: 1; flex-direction: row; align-items: center; order: 2; }
  .tags { order: 3; } .good { order: 4; } .actions { order: 5; }
}
@media (prefers-reduced-motion: reduce) { aside.side, .res, .navlink, .btn { transition: none; } }
.loading #view { opacity: .55; transition: opacity .15s .1s; }
.similar-head h2 a { color: inherit; }