/* emacsgolf — the whole site is an Emacs frame.
   Palette: gruvbox dark (hard). Sharp corners only; editors don't do border-radius. */

:root {
  --bg-deep: #141617;
  --bg: #1d2021;
  --bg1: #282828;
  --bg2: #3c3836;
  --bg3: #504945;
  --bg4: #665c54;
  --fg: #ebdbb2;
  --fg-dim: #a89984;
  --gray: #928374;
  --yellow: #fabd2f;
  --orange: #fe8019;
  --green: #b8bb26;
  --aqua: #8ec07c;
  --blue: #83a598;
  --red: #fb4934;
  --purple: #d3869b;
  --display: "Martian Mono", monospace;
  --body: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 700px at 75% -10%, rgba(250, 189, 47, 0.05), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(131, 165, 152, 0.05), transparent 60%),
    var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* faint CRT scanlines over everything */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.11) 0 1px, transparent 1px 3px);
  opacity: 0.5;
  z-index: 999;
}

::selection { background: var(--yellow); color: var(--bg-deep); }

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--yellow); }

kbd {
  display: inline-block;
  font-family: var(--body);
  font-size: 0.82em;
  color: var(--fg);
  background: var(--bg2);
  border: 1px solid var(--bg3);
  border-bottom-width: 3px;
  padding: 0 0.4em;
  line-height: 1.7;
  vertical-align: baseline;
}

code {
  color: var(--aqua);
  background: var(--bg1);
  padding: 0.05em 0.35em;
}

/* ---- blinking cursor ---- */
.cursor {
  display: inline-block;
  width: 0.55em;
  height: 1.1em;
  background: var(--fg);
  vertical-align: text-bottom;
  margin-left: 0.12em;
  animation: blink 1.06s step-end infinite;
}
.cursor.big { width: 0.5em; height: 0.9em; background: var(--yellow); }
@keyframes blink { 50% { opacity: 0; } }

/* ---- topbar ---- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--bg2);
  background: rgba(20, 22, 23, 0.75);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.brand:hover { color: var(--fg); }
.mx { color: var(--blue); font-weight: 600; }
.ret { color: var(--gray); font-size: 0.85em; border: 1px solid var(--bg3); padding: 0 0.3em; }
.nav-links { display: flex; gap: 1.5rem; font-size: 0.85rem; }
.nav-links a { color: var(--fg-dim); }
.nav-links a:hover { color: var(--yellow); }
.nav-links .dl { color: var(--green); }
.nav-links .dl::before { content: "↓ "; }

main {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem) 4rem;
}

/* ---- org-style section headings ---- */
h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--fg);
  margin: 4rem 0 1.5rem;
}
h2::before { content: "* "; color: var(--blue); }

/* ---- hero ---- */
.hero {
  position: relative;
  padding: clamp(3rem, 9vh, 6rem) 0 2rem;
}
.lambda {
  position: absolute;
  top: -1rem;
  right: -2rem;
  font-size: clamp(14rem, 30vw, 26rem);
  line-height: 1;
  color: var(--bg1);
  transform: rotate(12deg);
  user-select: none;
  pointer-events: none;
  z-index: -1;
  text-shadow: 0 0 80px rgba(250, 189, 47, 0.06);
}
.hero h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.6rem, 8vw, 5.5rem);
  letter-spacing: -0.04em;
  margin: 0;
  color: var(--yellow);
  text-shadow: 0 0 40px rgba(250, 189, 47, 0.25);
}
.hero .astr { color: var(--bg4); font-weight: 400; }
.tagline {
  font-size: clamp(1.05rem, 2.5vw, 1.4rem);
  color: var(--fg);
  margin: 1rem 0 0.5rem;
}
.tagline em { color: var(--orange); font-style: italic; }
.lede { max-width: 62ch; color: var(--fg-dim); }

.minibuffer {
  font-family: var(--body);
  background: var(--bg-deep);
  border: 1px solid var(--bg2);
  border-left: 3px solid var(--blue);
  padding: 0.6rem 1rem;
  margin: 1.6rem 0;
  max-width: fit-content;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
.minibuffer.error { border-left-color: var(--red); }

.stats { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2.2rem; }
.stat { min-width: 180px; }
.stat .modeline { border: 1px solid var(--bg3); }

/* ---- mode-lines ---- */
.modeline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  padding: 0.32em 0.7em;
  background: var(--bg2);
  color: var(--fg-dim);
  white-space: nowrap;
  overflow: hidden;
}
.modeline.active { background: var(--bg3); color: var(--fg); }
.modeline .flags { color: var(--gray); }
.ml-right { flex-shrink: 0; }

/* ---- challenge cards ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1.4rem;
}
.card {
  display: flex;
  flex-direction: column;
  background: var(--bg1);
  border: 1px solid var(--bg2);
  color: var(--fg);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
  animation: rise 0.5s ease backwards;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--bg4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  color: var(--fg);
}
.card:hover .modeline { background: var(--bg3); color: var(--fg); }
.card:hover h3 { color: var(--yellow); }
.card-body { padding: 1.2rem 1.2rem 0.9rem; flex: 1; }
.card h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
  transition: color 0.18s ease;
}
.card p { margin: 0 0 1rem; font-size: 0.82rem; color: var(--fg-dim); }
.preview {
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--gray);
  overflow: hidden;
  max-height: 4.6em;
  -webkit-mask-image: linear-gradient(180deg, #000 40%, transparent);
  mask-image: linear-gradient(180deg, #000 40%, transparent);
}

/* ---- how to play ---- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
}
.steps li {
  background: var(--bg1);
  border: 1px solid var(--bg2);
  padding: 1.4rem;
}
.steps h3 {
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 0.9rem;
}
.step-n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7em;
  height: 1.7em;
  margin-right: 0.5em;
  background: var(--yellow);
  color: var(--bg-deep);
  font-weight: 800;
}
.steps p { font-size: 0.82rem; color: var(--fg-dim); margin-bottom: 0; }
.snippet {
  background: var(--bg-deep);
  border: 1px solid var(--bg2);
  padding: 0.6rem 0.9rem;
  font-size: 0.82rem;
  overflow-x: auto;
  color: var(--fg);
}
.fineprint { margin-top: 2rem; font-size: 0.78rem; color: var(--gray); max-width: 75ch; }

/* ---- challenge page ---- */
.hole-header { padding-top: 3rem; }
.crumb { font-size: 0.8rem; color: var(--gray); margin: 0 0 0.4rem; }
.crumb a { color: var(--gray); }
.crumb a:hover { color: var(--yellow); }
.hole-title { display: flex; align-items: center; gap: 1.4rem; flex-wrap: wrap; }
.hole-title h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.8rem, 5vw, 3rem);
  letter-spacing: -0.03em;
  margin: 0;
}
.par-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 2px solid var(--yellow);
  color: var(--yellow);
  padding: 0.25rem 0.8rem;
  line-height: 1.2;
}
.par-chip span { font-size: 0.6rem; letter-spacing: 0.2em; }
.par-chip strong { font-family: var(--display); font-size: 1.3rem; }
.hole-desc { color: var(--fg-dim); max-width: 70ch; }

.windows {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-top: 2rem;
}
@media (max-width: 760px) { .windows { grid-template-columns: 1fr; } }
.window {
  border: 1px solid var(--bg2);
  background: var(--bg1);
  display: flex;
  flex-direction: column;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.3);
}
.window pre {
  margin: 0;
  padding: 1.1rem 1.2rem;
  font-size: 0.88rem;
  overflow-x: auto;
  flex: 1;
  min-height: 8em;
}

/* ---- leaderboard ---- */
.org-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.org-table th, .org-table td {
  border: 1px solid var(--bg2);
  padding: 0.45em 0.9em;
  text-align: left;
}
.org-table th {
  background: var(--bg1);
  color: var(--fg-dim);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}
.org-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.org-table .rank { color: var(--gray); text-align: right; width: 3em; }
.org-table .date { color: var(--gray); font-size: 0.8rem; }
.org-table tr.leader td { color: var(--yellow); border-bottom: 1px solid var(--bg3); }
.org-table .empty { color: var(--gray); font-style: italic; }
.par-under { color: var(--green); }
.unverified { color: var(--gray); cursor: help; }
.par-over { color: var(--orange); }
.par-even { color: var(--fg-dim); }

/* ---- recent attempts ---- */
.attempt-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 1rem; }
.attempt-list li { background: var(--bg1); border: 1px solid var(--bg2); padding: 0.9rem 1.1rem; }
.attempt-head { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: 0.85rem; margin-bottom: 0.6rem; }
.attempt-head span { color: var(--fg-dim); }
.keys { display: flex; flex-wrap: wrap; gap: 0.3em; }
.keys .more { color: var(--gray); font-size: 0.78rem; align-self: center; }

/* ---- 404 ---- */
.nf h1 { color: var(--red); text-shadow: 0 0 40px rgba(251, 73, 52, 0.25); }

/* ---- echo area footer ---- */
.echo-area {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.55rem clamp(1rem, 4vw, 3rem);
  border-top: 1px solid var(--bg2);
  background: var(--bg-deep);
  color: var(--gray);
  font-size: 0.78rem;
}
.echo-right a { color: var(--fg-dim); text-decoration: underline dotted; }