:root {
  --paper: #faf8f3;
  --ink: #1b1f24;
  --muted: #5d6670;
  --line: #e4e0d6;
  --card: #ffffff;
  --accent: #d9480f;
  --code-bg: #14171c;
  --code-ink: #d8dee9;
  --inline-code: #efebe2;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #121519;
    --ink: #e6e8eb;
    --muted: #98a1ab;
    --line: #262b32;
    --card: #181c21;
    --accent: #ff8a4c;
    --code-bg: #0b0d10;
    --inline-code: #222830;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.65 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-underline-offset: 2px; }
img { max-width: 100%; height: auto; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
:not(pre) > code {
  font-size: .88em;
  background: var(--inline-code);
  padding: .1em .35em;
  border-radius: 4px;
}
pre {
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 1rem 1.1rem;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.55;
}
pre code { background: none; padding: 0; }

header.site, main, footer.site { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header.site {
  display: flex; flex-wrap: wrap; gap: .5rem 1.5rem;
  align-items: center; justify-content: space-between;
  padding-top: .9rem; padding-bottom: .9rem;
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10; background: var(--paper);
}
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 700; color: var(--ink); text-decoration: none; }
.logo { width: 32px; height: 32px; display: block; }
header.site nav { display: flex; gap: 1.2rem; font-size: .95rem; }
header.site nav a { color: var(--muted); text-decoration: none; }
header.site nav a:hover { color: var(--accent); }
footer.site { margin-top: 4rem; padding-top: 1.2rem; padding-bottom: 2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }

h1, h2, h3 { line-height: 1.25; letter-spacing: -.01em; }
h1 { font-size: clamp(1.7rem, 5vw, 2.4rem); margin: .2rem 0 1.2rem; }
h2 { font-size: 1.4rem; margin-top: 2.6rem; }
h3 { font-size: 1.1rem; margin-top: 1.8rem; }
.kicker { margin: 2rem 0 0; color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; }

/* Home */
.intro p { color: var(--muted); max-width: 60ch; }
.cards { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; gap: 1.5rem; }
.card {
  display: grid; grid-template-columns: minmax(0, 200px) 1fr; gap: 1.2rem;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1rem;
}
.card .cover img { display: block; border-radius: 6px; }
.card .kicker { margin: 0; }
.card h2 { margin: .2rem 0 .4rem; font-size: 1.2rem; }
.card h2 a { color: var(--ink); text-decoration: none; }
/* The title link covers the whole card; the player link stays on top of it. */
.card { position: relative; transition: border-color .15s, box-shadow .15s; }
.card h2 a::after { content: ""; position: absolute; inset: 0; border-radius: 10px; }
.card:hover { border-color: var(--accent); box-shadow: 0 4px 18px -10px var(--accent); }
.card:hover h2 a { color: var(--accent); }
.card h2 a:focus-visible { outline: none; }
.card h2 a:focus-visible::after { outline: 2px solid var(--accent); outline-offset: 2px; }
.card .player { position: relative; z-index: 1; }
.card p { margin: 0 0 .8rem; color: var(--muted); font-size: .95rem; }
@media (max-width: 560px) { .card { grid-template-columns: 1fr; } }

/* Player */
.player { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; color: var(--ink); }
.player .avatar { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; border: 2px solid var(--line); }
.player .who { display: flex; flex-direction: column; line-height: 1.3; }
.player .name { font-weight: 700; }
.player .id { color: var(--muted); font-size: .9rem; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.player:hover .name { color: var(--accent); }
.card .player .avatar { width: 40px; height: 40px; }

/* Post */
.hero { display: grid; grid-template-columns: minmax(0, 400px) 1fr; gap: 1.5rem; align-items: start; }
@media (max-width: 680px) { .hero { grid-template-columns: 1fr; } }
.hero .target { margin: 0; }
.hero .target img { display: block; border-radius: 8px; }
.hero figcaption { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; margin-top: .5rem; font-size: .85rem; }
.swatch { width: 14px; height: 14px; border-radius: 3px; background: var(--c); border: 1px solid var(--line); margin-left: .4rem; }
.swatch:first-child { margin-left: 0; }
.facts { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1rem 1.1rem; }
.facts .label { margin: 0 0 .6rem; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; }
.facts dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; margin: 1.1rem 0 .9rem; }
.facts dt { color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; }
.facts dd { margin: 0; font-size: 1.3rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.facts .play { font-size: .9rem; }
pre.solution { margin-top: 1.5rem; white-space: pre-wrap; word-break: break-all; }
.post table { border-collapse: collapse; width: 100%; font-size: .95rem; }
.post th, .post td { border-bottom: 1px solid var(--line); padding: .45rem .5rem; text-align: left; }
.anim { margin: 2rem 0; }

/* Animation player (assets/js/anim-player.js) */
.anim-controls {
  max-width: 400px; margin: .8rem auto 0;
  display: grid; grid-template-columns: auto auto minmax(0, 1fr) auto; gap: 10px; align-items: center;
}
.anim-controls button, .anim-steps button {
  font: 500 13px/1 inherit; font-family: inherit; color: var(--ink); background: var(--card);
  border: 1px solid var(--line); border-radius: 999px; padding: 9px 14px; cursor: pointer;
}
.anim-controls button:hover { border-color: var(--accent); }
.anim-controls button.primary { background: var(--accent); border-color: var(--accent); color: var(--paper); min-width: 78px; }
.anim button:focus-visible, .anim input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.anim-controls input[type="range"] { width: 100%; margin: 0; accent-color: var(--accent); }
.anim-time { font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--muted); font-variant-numeric: tabular-nums; min-width: 5ch; text-align: right; }
.anim-steps { list-style: none; max-width: 400px; margin: .8rem auto 0; padding: 0; display: grid; gap: 2px; }
.anim-steps button {
  width: 100%; text-align: left; border-radius: 6px; border-color: transparent; background: transparent;
  display: grid; grid-template-columns: 1.8em minmax(0, 1fr); gap: 6px; padding: 7px 10px; font-weight: 400; line-height: 1.35; font-size: 14px;
}
.anim-steps button:hover { background: var(--card); border-color: var(--line); }
.anim-steps .num { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; color: var(--muted); padding-top: 1px; }
.anim-steps li.cur button { background: var(--card); border-color: var(--line); }
.anim-steps li.cur .num { color: var(--accent); font-weight: 600; }
.anim-steps li.done .t { color: var(--muted); }

/* Language selector */
.lang-select {
  font: 600 .85rem/1.2 inherit; font-family: inherit; color: var(--ink);
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: .35rem .7rem; cursor: pointer;
}
.lang-select:hover { border-color: var(--accent); }
.lang-select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
header.site nav { align-items: center; }