/* MOTD — the page is a terminal session, because the subject is a terminal.
   Dark here is not a theme choice, it is the ground the subject actually sits
   on; so contrast is pushed hard and structure comes from visible window
   chrome, rules and filled surfaces rather than from empty space. */

:root {
  --ground:   #0a0e14;
  --window:   #11161f;
  --raised:   #161d28;
  --sunken:   #070a0f;
  --edge:     #2a3444;
  --edge-hot: #3d4c63;

  --text:     #dbe4f0;
  --dim:      #8496ad;
  --faint:    #5a6b84;

  --green:    #6fd08c;
  --amber:    #ffb84d;
  --cyan:     #58cfe0;
  --red:      #ff7b72;
  --magenta:  #c792ea;

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --bar: 2.35rem;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  padding: 0 0 calc(var(--bar) + env(safe-area-inset-bottom)) 0;
  background: var(--ground);
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.62;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

a { color: var(--cyan); text-underline-offset: 3px; }
a:hover { color: var(--amber); }

.wrap { max-width: 47rem; margin: 0 auto; padding: 0 0.85rem; }

/* ── window chrome ──────────────────────────────────────────────────── */

.term {
  border: 1px solid var(--edge);
  background: var(--window);
  margin: 0.85rem 0 1.4rem;
  box-shadow: 0 0 0 1px rgba(0,0,0,.6), 0 18px 44px rgba(0,0,0,.55);
}

.term__bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem 0.7rem;
  background: var(--raised);
  border-bottom: 1px solid var(--edge);
  font-size: 0.74rem;
  color: var(--dim);
  letter-spacing: 0.02em;
}

.term__dots { display: flex; gap: 0.3rem; flex: none; }
.term__dot { width: 9px; height: 9px; border-radius: 50%; background: var(--edge-hot); }
.term__dot--live { background: var(--green); }

.term__title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.term__body { padding: 0.95rem 0.8rem 1.1rem; }

/* ── the login banner: the actual concept ───────────────────────────── */

.login { color: var(--dim); font-size: 0.78rem; margin: 0 0 0.9rem; }

.banner {
  border: 1px solid var(--edge-hot);
  background: var(--sunken);
  padding: 0.9rem 0.85rem;
  margin: 0 0 1rem;
}

.banner__kicker {
  color: var(--green);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  margin: 0 0 0.55rem;
}

.banner h1 {
  margin: 0;
  font-size: clamp(1.55rem, 8.2vw, 2.5rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--amber);
  overflow-wrap: anywhere;
}

.banner h1 .sec { color: var(--faint); font-weight: 400; }

.banner__title {
  margin: 0.5rem 0 0;
  color: var(--text);
  font-size: 0.97rem;
  font-weight: 400;
}

.banner__meta {
  margin: 0.75rem 0 0;
  padding-top: 0.65rem;
  border-top: 1px solid var(--edge);
  color: var(--dim);
  font-size: 0.76rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
}
.banner__meta b { color: var(--text); font-weight: 500; }

/* ── section headings as shell prompts ──────────────────────────────── */

.prompt {
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
  margin: 1.9rem 0 0.9rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--edge);
  font-size: 0.93rem;
  overflow-wrap: anywhere;
}
.prompt:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.prompt__sigil { color: var(--green); flex: none; font-weight: 700; }
.prompt__cmd { color: var(--text); font-weight: 500; }
.prompt__arg { color: var(--cyan); }

/* ── the ten ────────────────────────────────────────────────────────── */

.points { list-style: none; margin: 0; padding: 0; counter-reset: pt; }

.point {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr);
  gap: 0 0.55rem;
  padding: 0.62rem 0;
  border-bottom: 1px dashed var(--edge);
  min-width: 0;
}
.point:last-child { border-bottom: 0; }

.point__n {
  color: var(--faint);
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
  padding-top: 0.16rem;
}

.point__body { min-width: 0; }

.point__code {
  display: inline-block;
  color: var(--amber);
  background: var(--sunken);
  border: 1px solid var(--edge);
  padding: 0.04rem 0.36rem;
  margin: 0 0 0.24rem;
  font-size: 0.83rem;
  font-weight: 500;
  max-width: 100%;
  overflow-x: auto;
  white-space: nowrap;
  vertical-align: bottom;
}

.point__text { margin: 0; overflow-wrap: anywhere; }
.point__src {
  color: var(--faint);
  font-size: 0.68rem;
  margin-left: 0.4rem;
  white-space: nowrap;
}

/* ── the exercise: a real session you copy ──────────────────────────── */

.lab__title { margin: 0 0 0.3rem; font-size: 1rem; color: var(--text); font-weight: 500; }
.lab__why { margin: 0 0 0.9rem; color: var(--dim); font-size: 0.87rem; }

.shell {
  position: relative;
  background: var(--sunken);
  border: 1px solid var(--edge-hot);
  margin: 0 0 0.85rem;
}

.shell__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.34rem 0.6rem;
  border-bottom: 1px solid var(--edge);
  color: var(--faint);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.shell__copy {
  font: inherit;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--edge-hot);
  padding: 0.16rem 0.5rem;
  cursor: pointer;
  flex: none;
}
.shell__copy:hover { color: var(--ground); background: var(--cyan); }
.shell__copy[data-done="1"] { color: var(--ground); background: var(--green); border-color: var(--green); }

.shell pre {
  margin: 0;
  padding: 0.7rem 0.6rem;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.7;
  -webkit-overflow-scrolling: touch;
}
.shell pre code { white-space: pre; }
.shell .sig { color: var(--green); user-select: none; }

.expect {
  border-left: 2px solid var(--green);
  background: rgba(111, 208, 140, .06);
  padding: 0.55rem 0.7rem;
  color: var(--text);
  font-size: 0.87rem;
}
.expect b { color: var(--green); font-weight: 500; display: block; font-size: 0.7rem; letter-spacing: 0.1em; margin-bottom: 0.2rem; }

.caution {
  border-left: 2px solid var(--amber);
  background: rgba(255, 184, 77, .07);
  padding: 0.55rem 0.7rem;
  margin-top: 0.7rem;
  font-size: 0.85rem;
}

/* ── quiz ───────────────────────────────────────────────────────────── */

.quiz { margin: 0; }

.q {
  border: 1px solid var(--edge);
  background: var(--raised);
  padding: 0.8rem 0.75rem;
  margin: 0 0 0.75rem;
}

.q__n { color: var(--green); font-size: 0.72rem; letter-spacing: 0.1em; margin: 0 0 0.35rem; }
.q__text { margin: 0 0 0.75rem; overflow-wrap: anywhere; font-size: 0.93rem; }
.q__text .blank { color: var(--amber); letter-spacing: 0.06em; }

.opts { display: grid; gap: 0.4rem; }

.opt {
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr);
  gap: 0.4rem;
  align-items: baseline;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--sunken);
  border: 1px solid var(--edge);
  padding: 0.5rem 0.55rem;
  cursor: pointer;
  min-width: 0;
}
.opt:hover:not([disabled]) { border-color: var(--cyan); }
.opt__k { color: var(--faint); }
.opt__v { overflow-wrap: anywhere; }
.opt[data-state="right"] { border-color: var(--green); background: rgba(111,208,140,.12); color: var(--green); }
.opt[data-state="right"] .opt__k { color: var(--green); }
.opt[data-state="wrong"] { border-color: var(--red); background: rgba(255,123,114,.1); color: var(--red); }
.opt[data-state="wrong"] .opt__k { color: var(--red); }
.opt[disabled] { cursor: default; }

.q__after { margin: 0.6rem 0 0; font-size: 0.83rem; color: var(--dim); display: none; }
.q[data-done="1"] .q__after { display: block; }

.score {
  border: 1px solid var(--edge-hot);
  background: var(--sunken);
  padding: 0.75rem;
  color: var(--dim);
  font-size: 0.88rem;
}
.score b { color: var(--amber); }

/* ── audio ──────────────────────────────────────────────────────────── */

.player { border: 1px solid var(--edge); background: var(--raised); padding: 0.7rem; }
.player__row { display: flex; align-items: center; gap: 0.6rem; }

.player__btn {
  font: inherit;
  flex: none;
  color: var(--ground);
  background: var(--green);
  border: 0;
  padding: 0.4rem 0.8rem;
  font-weight: 700;
  cursor: pointer;
}
.player__btn:hover { background: var(--amber); }

.player__meta { color: var(--dim); font-size: 0.78rem; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.chapters { list-style: none; margin: 0.7rem 0 0; padding: 0; display: grid; gap: 0.25rem; }
.chapter {
  display: grid;
  grid-template-columns: 1.6rem minmax(0,1fr) auto;
  gap: 0.45rem;
  align-items: baseline;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: 0.84rem;
  color: var(--dim);
  background: transparent;
  border: 1px solid transparent;
  border-left: 2px solid var(--edge);
  padding: 0.3rem 0.4rem;
  cursor: pointer;
  min-width: 0;
}
.chapter:hover { color: var(--text); border-left-color: var(--cyan); }
.chapter[data-playing="1"] { color: var(--green); border-left-color: var(--green); background: rgba(111,208,140,.07); }
.chapter__t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chapter__d { color: var(--faint); font-size: 0.75rem; font-variant-numeric: tabular-nums; }

/* ── archive: an ls -l listing ──────────────────────────────────────── */

.ls { display: grid; gap: 0; }
.ls__row {
  display: grid;
  grid-template-columns: auto minmax(0,1fr);
  gap: 0.7rem;
  padding: 0.45rem 0.2rem;
  border-bottom: 1px dashed var(--edge);
  align-items: baseline;
  min-width: 0;
  text-decoration: none;
}
.ls__row:last-child { border-bottom: 0; }
.ls__date { color: var(--faint); font-size: 0.78rem; font-variant-numeric: tabular-nums; }
.ls__name { color: var(--cyan); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ls__row:hover .ls__name { color: var(--amber); }

/* ── tmux-style status bar ──────────────────────────────────────────── */

.status {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: calc(var(--bar) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  background: var(--green);
  color: var(--ground);
  font-size: 0.75rem;
  font-weight: 500;
  padding-left: 0.6rem;
  padding-right: 0.6rem;
  z-index: 40;
  border-top: 1px solid #0a0e14;
}
.status__tag { background: var(--ground); color: var(--green); padding: 0.1rem 0.45rem; font-weight: 700; flex: none; }
.status__item { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.status__spacer { margin-left: auto; }

/* ── the operator's own terminal (root, not you) ────────────────────── */

.term--root { border-color: var(--magenta); }
.term--root .term__bar { background: #1b1424; border-bottom-color: var(--magenta); }
.term__dot--root { background: var(--magenta); }

.banner--root { border-color: var(--magenta); }
.banner--root h1 { color: var(--magenta); }

.prompt--root { border-top-color: #3a2b47; }
.prompt--root .prompt__sigil { color: var(--magenta); }
.prompt--root .prompt__arg { color: var(--amber); }

.dispatch {
  border-top: 1px dashed var(--edge-hot);
  padding: 1rem 0 0.2rem;
  margin-top: 1rem;
}
.dispatch:first-child { border-top: 0; padding-top: 0; margin-top: 0; }
.dispatch__n {
  color: var(--magenta);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  margin: 0 0 0.3rem;
}
.dispatch__n span { color: var(--faint); letter-spacing: 0; }
.dispatch h3 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
  color: var(--text);
  font-weight: 500;
  letter-spacing: 0;
}
.dispatch p { margin: 0 0 0.7rem; font-size: 0.91rem; overflow-wrap: anywhere; }
.dispatch p:last-child { margin-bottom: 0; }

/* ── the operator ───────────────────────────────────────────────────── */

.operator {
  border: 1px solid var(--magenta);
  background: linear-gradient(180deg, rgba(199,146,234,.10), rgba(199,146,234,.02));
  padding: 0.85rem 0.8rem;
}
.operator__locked { margin: 0; color: var(--text); font-size: 0.89rem; }
.operator__locked code { color: var(--amber); }
.operator__locked b { color: var(--magenta); }
.operator h3 {
  margin: 0 0 0.6rem;
  color: var(--magenta);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  font-weight: 700;
}
.operator p + p { margin-top: 0.75rem; }
.operator__body p {
  margin: 0;
  font-size: 0.91rem;
  overflow-wrap: anywhere;
}
.operator__sig {
  margin-top: 0.8rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--edge-hot);
  color: var(--faint);
  font-size: 0.72rem;
}

/* ── misc ───────────────────────────────────────────────────────────── */

.note { color: var(--dim); font-size: 0.83rem; }
.foot { color: var(--faint); font-size: 0.76rem; padding: 1.3rem 0 0.6rem; border-top: 1px solid var(--edge); margin-top: 1.6rem; }
.foot a { color: var(--dim); }

.cursor { display: inline-block; width: 0.55em; height: 1.02em; background: var(--green); vertical-align: -0.16em; animation: blink 1.15s steps(2, start) infinite; }
@keyframes blink { to { visibility: hidden; } }

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
  * { scroll-behavior: auto !important; }
}

@media (min-width: 40rem) {
  body { font-size: 15.5px; }
  .term__body { padding: 1.25rem 1.2rem 1.4rem; }
  .banner { padding: 1.15rem 1.1rem; }
}