/* Write-up pages: a soft grey reading theme (after Obsidian's dark), easier on the eyes than the
   story's near-black. No 3D, no framework. */
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 300 800; font-display: swap; src: url('/fonts/inter-latin.woff2') format('woff2'); }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400 800; font-display: swap; src: url('/fonts/jetbrains-mono-latin.woff2') format('woff2'); }

:root {
  --bg: #1e1e1e;
  --panel: #262626;
  --panel-2: #2e2e2e;
  --code: #181818;
  --line: rgba(255, 255, 255, 0.1);
  --text: #dcddde;
  --dim: #a3a3a3;
  --v: #7f6df2;
  --v-soft: #a88bfa;
  --mono: 'JetBrains Mono', Consolas, Menlo, monospace;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 16px/1.7 'Inter', system-ui, 'Segoe UI', Arial, sans-serif; -webkit-font-smoothing: antialiased; overflow-wrap: break-word; }
a { color: var(--v-soft); text-underline-offset: 3px; }
a:hover { color: #fff; }
:focus-visible { outline: 2px solid var(--v); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }

.top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px clamp(16px, 4vw, 40px); background: rgba(30, 30, 30, 0.95); border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font: 700 12px var(--mono); letter-spacing: 0.3em; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--v-soft); }
.top nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px 18px; }
.top nav a { color: var(--dim); text-decoration: none; font-size: 14px; font-weight: 500; }
.top nav a:hover { color: #fff; }

main { width: min(100% - 32px, 1120px); margin: 0 auto; padding: clamp(28px, 6vw, 64px) 0 56px; }
main.room { width: min(100% - 32px, 860px); }
.kicker { margin: 0 0 10px; color: var(--v-soft); font: 600 11px var(--mono); letter-spacing: 0.3em; }
h1 { margin: 0 0 14px; font-size: clamp(30px, 5vw, 52px); line-height: 1.1; letter-spacing: -0.02em; font-weight: 800; }
.room h1 { font-size: clamp(24px, 3.6vw, 36px); line-height: 1.2; }
.lede { margin: 0 0 18px; max-width: 68ch; color: var(--dim); font-size: 17px; }

.badges { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; }
.badge { padding: 2px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--dim); font: 600 10.5px var(--mono); letter-spacing: 0.08em; text-transform: uppercase; }
.badge.d-easy { color: #7dffa8; border-color: rgba(125, 255, 168, 0.35); }
.badge.d-medium { color: #ffcf6b; border-color: rgba(255, 207, 107, 0.35); }
.badge.d-hard { color: #ff7a85; border-color: rgba(255, 122, 133, 0.4); }
.badge.d-info { color: #b9b9b9; border-color: rgba(255, 255, 255, 0.22); }

/* the list */
.tools { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 26px 0 10px; }
#q { flex: 1 1 280px; min-width: 0; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel); color: var(--text); font: inherit; font-size: 15px; }
#q::placeholder { color: #7d7d7d; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { padding: 9px 14px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--dim); font: 600 12px var(--mono); letter-spacing: 0.08em; cursor: pointer; }
.chip:hover { color: #fff; }
.chip.on { background: var(--v); border-color: var(--v); color: #fff; }
.count, .none { margin: 0 0 16px; color: var(--dim); font: 500 12px var(--mono); letter-spacing: 0.1em; }
.none { margin-top: 24px; font-size: 14px; }
.grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 14px; }
.card a { display: flex; flex-direction: column; gap: 12px; height: 100%; padding: 16px; border-radius: 14px; border: 1px solid var(--line); background: var(--panel); color: inherit; text-decoration: none; transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease; }
.card a:hover { border-color: rgba(168, 139, 250, 0.6); background: var(--panel-2); transform: translateY(-2px); }
.card-top { display: flex; gap: 14px; align-items: center; }
.card-art, .room-art { flex: 0 0 auto; display: grid; place-items: center; overflow: hidden; border-radius: 12px; background: var(--code); border: 1px solid var(--line); }
.card-art { width: 64px; height: 64px; }
.card-art img, .room-art img { width: 100%; height: 100%; object-fit: cover; }
.ph { color: var(--v-soft); font: 700 20px var(--mono); letter-spacing: 0.04em; }
.card-head { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.card-head strong { font-size: 17px; line-height: 1.25; color: #fff; }
.card-text { color: var(--dim); font-size: 14px; line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.topics { display: flex; flex-wrap: wrap; gap: 6px; }
.topic { padding: 3px 9px; border-radius: 6px; background: rgba(127, 109, 242, 0.16); color: #c9bcff; font: 500 11.5px var(--mono); }
.card-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: auto; padding-top: 12px; border-top: 1px solid var(--line); color: var(--dim); font: 500 11.5px var(--mono); letter-spacing: 0.04em; }
.go { color: var(--v-soft); font-weight: 700; }
.card a:hover .go { color: #fff; }
.read { color: var(--dim); font: 500 11.5px var(--mono); align-self: center; margin-left: 4px; }

/* a room */
.back { display: inline-block; margin-bottom: 22px; color: var(--dim); text-decoration: none; font: 500 13px var(--mono); }
.room-head { display: flex; gap: 22px; align-items: flex-start; padding-bottom: 26px; margin-bottom: 30px; border-bottom: 1px solid var(--line); }
.room-art { width: 132px; height: 132px; border-radius: 18px; }
.room-art .ph { font-size: 38px; }
.path { margin: 12px 0 0; color: var(--dim); font: 500 13px/1.6 var(--mono); }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; }
.btn { display: inline-flex; align-items: center; padding: 10px 16px; border-radius: 10px; border: 1px solid var(--line); color: var(--text); text-decoration: none; font-size: 14px; font-weight: 600; }
.btn:hover { border-color: rgba(160, 140, 255, 0.6); }
.btn.primary { background: var(--v); border-color: var(--v); color: #fff; }
.btn.primary:hover { background: #8f7ff5; }

.md { font-size: 16.5px; }
.md > :first-child { margin-top: 0; }
.md h1, .md h2, .md h3, .md h4 { margin: 1.9em 0 0.6em; line-height: 1.3; letter-spacing: -0.01em; color: #fff; scroll-margin-top: 80px; }
.md h1 { font-size: 26px; }
.md h2 { font-size: 23px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.md h3 { font-size: 19px; }
.md h4 { font-size: 16.5px; }
.md p, .md ul, .md ol, .md blockquote, .md table, .md pre { margin: 0 0 1.1em; }
.md ul, .md ol { padding-left: 1.4em; }
.md li { margin: 0.25em 0; }
.md img { max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--line); }
.md div[align='center'] img, .md p[align='center'] img { margin: 0 auto; }
.md hr { border: 0; border-top: 1px solid var(--line); margin: 2em 0; }
.md blockquote { padding: 2px 16px; border-left: 3px solid var(--v); color: var(--dim); background: rgba(139, 108, 255, 0.06); border-radius: 0 8px 8px 0; }
.md code { font: 500 0.88em var(--mono); padding: 2px 6px; border-radius: 6px; background: rgba(139, 108, 255, 0.14); color: #d9cfff; }
.md pre { position: relative; overflow-x: auto; padding: 16px 18px; border-radius: 12px; border: 1px solid var(--line); background: var(--code); font-size: 13.5px; line-height: 1.6; }
.md pre code { padding: 0; background: none; color: #dcd8ea; font-size: inherit; white-space: pre; }
.md table { display: block; overflow-x: auto; border-collapse: collapse; font-size: 14.5px; }
.md th, .md td { padding: 8px 12px; border: 1px solid var(--line); text-align: left; }
.md th { background: var(--panel); color: #fff; }
.copy { position: absolute; top: 8px; right: 8px; padding: 4px 10px; border-radius: 7px; border: 1px solid var(--line); background: var(--panel-2); color: var(--dim); font: 600 11px var(--mono); cursor: pointer; opacity: 0; transition: opacity 0.15s ease; }
.md pre:hover .copy, .copy:focus-visible { opacity: 1; }
@media (hover: none) { .copy { opacity: 1; } }

/* a flag: there, but unread until asked for */
.flag { filter: blur(6px); cursor: pointer; border-radius: 4px; background: rgba(139, 108, 255, 0.18); user-select: none; transition: filter 0.2s ease; }
.flag:hover { filter: blur(4.5px); }
.flag.shown { filter: none; cursor: text; user-select: text; background: rgba(125, 255, 168, 0.12); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); }
.pager a { display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); color: #fff; text-decoration: none; font-weight: 600; }
.pager a:hover { border-color: rgba(160, 140, 255, 0.55); }
.pager a.next { text-align: right; }
.pager small { color: var(--dim); font: 500 11px var(--mono); letter-spacing: 0.1em; }

.foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding: 22px clamp(16px, 4vw, 40px) 34px; border-top: 1px solid var(--line); color: var(--dim); font-size: 13px; }

@media (max-width: 640px) {
  .top nav { gap: 2px 14px; }
  .top nav a { font-size: 13px; }
  .room-head { flex-direction: column; gap: 16px; }
  .room-art { width: 96px; height: 96px; }
  .md { font-size: 16px; }
  .md pre { margin-left: -16px; margin-right: -16px; border-radius: 0; border-left: 0; border-right: 0; }
  .pager { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }