/* ============================================================
   baselashraf.com/sensortap/
   Direction: broadcast teletext service. See DESIGN.md.
   Fixed eight-colour broadcast palette on flat black. One bitmap-
   flavoured monospace face, one grid, no gradients, no glow, no
   blur. Cyan carries every live measured figure; red is reserved
   for exactly one state, an absent sensor a visitor has revealed.
   ============================================================ */

:root {
  --black: #000000;
  --page: #0b0b0b;
  --white: #f2f2f2;
  --grey: #8a8a8a;
  --yellow: #ffe15a;
  --cyan: #5adfdf;
  --green: #5ad46a;
  --red: #ff5a5a;
  --blue: #5a7dff;

  --font-mono: 'IBM Plex Mono', ui-monospace, 'Courier New', monospace;

  --cell: 1ch;
  --shell: 74rem;
  --gap: clamp(1.25rem, 5vw, 3rem);
  --measure: 42rem;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: underline; text-decoration-color: rgba(90, 223, 223, 0.45); text-underline-offset: 0.2em; }
a:hover { text-decoration-color: currentColor; }
a:visited { color: var(--cyan); }

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

code, kbd { font-family: var(--font-mono); }

:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -120%);
  z-index: 100;
  background: var(--yellow);
  color: var(--black);
  padding: 0.6rem 1rem;
  font-weight: 700;
}
.skip:focus { transform: translate(-50%, 0); }

/* --- Nav bar ------------------------------------------------------------ */

.bar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--black);
  border-bottom: 2px solid var(--white);
}

.bar__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0.75rem var(--gap);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.bar__name {
  font-size: 0.86rem;
  color: var(--grey);
  text-decoration: none;
}
.bar__name strong { color: var(--white); }
.bar__name:hover { color: var(--white); }
.bar__name:visited { color: var(--grey); }

.bar__links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.bar__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.65rem;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--grey);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
}
.bar__link:hover { color: var(--white); border-color: var(--grey); }
.bar__link--primary { color: var(--black); background: var(--yellow); font-weight: 700; }
.bar__link--primary:hover { background: var(--white); color: var(--black); border-color: var(--white); }
.bar__link--dim { color: var(--grey); }
.bar__link--icon { padding: 0.4rem; }
.bar__link:visited { color: var(--grey); }
.bar__link--primary:visited { color: var(--black); }

.bar__divider { width: 1px; height: 1.2rem; background: var(--grey); margin: 0 0.2rem; }

.icon { width: 1em; height: 1em; }

.drop { position: relative; }
.drop summary { cursor: pointer; list-style: none; }
.drop summary::-webkit-details-marker { display: none; }
.drop__chevron { transition: transform 0.1s linear; }
.drop[open] .drop__chevron { transform: rotate(180deg); }

.drop__menu {
  position: absolute;
  top: calc(100% + 2px);
  min-width: 15rem;
  background: var(--black);
  border: 2px solid var(--white);
  padding: 0;
}
.drop__menu--right { right: 0; }

.drop__option {
  display: block;
  padding: 0.5rem 0.7rem;
  text-decoration: none;
  border-bottom: 1px solid var(--grey);
}
.drop__option:last-child { border-bottom: none; }
.drop__option:hover { background: var(--white); }
.drop__option:hover .drop__name { color: var(--black); }
.drop__option:hover .drop__note { color: #333; }
.drop__name { display: block; font-size: 0.88rem; font-weight: 700; color: var(--cyan); }
.drop__note { display: block; font-size: 0.78rem; color: var(--grey); margin-top: 0.1rem; }

/* --- Page header (teletext masthead) ------------------------------------- */

.tt-head {
  border-bottom: 2px solid var(--white);
  background: var(--black);
  padding: 1px 0;
}

.tt-head__row {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0.75rem var(--gap);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.82rem;
  flex-wrap: wrap;
  gap: 0.4rem 1.5rem;
}

.tt-head__page { color: var(--yellow); font-weight: 700; }
.tt-head__mag { color: var(--white); letter-spacing: 0.08em; }
.tt-head__live { color: var(--green); }
.tt-head__live::before { content: "\25CF "; }
.tt-head__clock { color: var(--grey); }

/* --- Hero (page 100) ------------------------------------------------------ */

.hero {
  padding: clamp(1.5rem, 5vh, 3rem) 0 clamp(2rem, 6vh, 3.5rem);
}

.hero__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gap);
}

.hero__kicker {
  display: block;
  color: var(--yellow);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 0.3rem;
  line-height: 1.6;
}

.wordmark {
  font-size: clamp(2rem, 1.4rem + 4vw, 3.2rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.05;
  margin: 0 0 1rem;
  color: var(--white);
}
.wordmark__stripe {
  display: inline-block;
  background: var(--white);
  color: var(--black);
  padding: 0 0.15em;
}

.lede {
  font-size: 1.02rem;
  color: var(--white);
  max-width: 58ch;
  margin: 0 0 0.9rem;
  line-height: 1.65;
}
.lede--quiet { color: var(--grey); font-size: 0.95rem; }

.hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  grid-template-columns: 1fr;
  margin-top: 2rem;
}
@media (min-width: 62rem) {
  .hero__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 24rem); align-items: start; }
}

.actions {
  display: flex;
  gap: 0.6rem;
  margin: 1.4rem 0 0.9rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  font-weight: 700;
  font-size: 0.92rem;
  text-decoration: none;
  border: 2px solid var(--white);
  color: var(--white);
  background: var(--black);
}
.button:hover { background: var(--white); color: var(--black); }
.button--primary {
  background: var(--yellow);
  color: var(--black);
  border-color: var(--yellow);
}
.button--primary:hover { background: var(--white); border-color: var(--white); }

/* `button` elements need the type/cursor reset that anchors get for free. */
button.button {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  cursor: pointer;
}
button.button[disabled] {
  cursor: default;
  opacity: 0.65;
}
button.button[disabled]:hover {
  background: var(--yellow);
  color: var(--black);
  border-color: var(--yellow);
}

.fineprint { font-size: 0.82rem; color: var(--grey); max-width: 40ch; }

/* --- Data page (the real sensortap list output) --------------------------- */

.data-page {
  border: 2px solid var(--white);
  background: var(--black);
}

.data-page__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.8rem;
  border-bottom: 2px solid var(--white);
  font-size: 0.78rem;
}
.data-page__head-left { color: var(--yellow); font-weight: 700; }
.data-page__head-right { color: var(--grey); }

.data-page__figures {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 2px solid var(--white);
}
.figure {
  padding: 0.9rem 0.7rem;
  border-right: 1px solid var(--grey);
  text-align: center;
}
.figure:last-child { border-right: none; }
.figure__value {
  display: block;
  font-size: clamp(1.6rem, 1.2rem + 2vw, 2.3rem);
  font-weight: 700;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.figure__label {
  display: block;
  font-size: 0.8rem;
  color: var(--grey);
  letter-spacing: 0.04em;
  margin-top: 0.35rem;
}

.data-page__rows {
  padding: 0.7rem 0.8rem;
  font-size: 0.78rem;
}
.dp-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 5.2rem 3rem 4.5rem;
  gap: 0.6rem;
  padding: 0.15rem 0;
  align-items: baseline;
}
.dp-row__id { color: var(--white); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dp-row__kind { color: var(--blue); }
.dp-row__unit { color: var(--grey); }
.dp-row__status--present { color: var(--green); text-align: right; }
.dp-row__status--absent { color: var(--red); text-align: right; }
.dp-more { color: var(--grey); font-style: italic; padding: 0.3rem 0; }

.data-page__foot {
  border-top: 2px solid var(--white);
  padding: 0.6rem 0.8rem;
  font-size: 0.78rem;
  color: var(--grey);
}
.data-page__foot strong { color: var(--white); }

/* --- Sections (numbered teletext pages) ----------------------------------- */

.tt-page {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px var(--gap) clamp(2.5rem, 7vh, 4.5rem);
  padding-top: clamp(3rem, 7vh, 4.5rem);
  border-top: 2px solid var(--white);
}

.tt-page__head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
}
.tt-page__num {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--yellow);
  line-height: 1;
}
.tt-page h2 {
  font-size: clamp(1.3rem, 1.05rem + 1vw, 1.7rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  margin: 0;
  color: var(--white);
  text-transform: uppercase;
}

.tt-page__body { max-width: var(--measure); }
.tt-page__body--wide { max-width: 56rem; }

.tt-page p { color: var(--grey); margin: 0 0 1rem; line-height: 1.7; }
.tt-page p:last-child { margin-bottom: 0; }
.tt-page p strong { color: var(--white); font-weight: 700; }
.tt-page code { color: var(--yellow); background: transparent; padding: 0; }

.statement { font-size: 1.05rem; color: var(--white); line-height: 1.6; }

/* --- Mosaic rule (block-graphic divider) ----------------------------------- */

.mosaic {
  display: flex;
  gap: 2px;
  height: 0.5rem;
  margin: 0 0 1.6rem;
  max-width: var(--measure);
}
.mosaic span { flex: 1; background: var(--grey); }
.mosaic span:nth-child(3n) { background: var(--yellow); }
.mosaic span:nth-child(5n) { background: var(--cyan); }

/* --- Reveal (details/summary, the REVEAL affordance) ----------------------- */

.reveal {
  border: 1px solid var(--grey);
  margin: 0 0 0.6rem;
}
.reveal summary {
  cursor: pointer;
  list-style: none;
  padding: 0.55rem 0.8rem;
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  font-size: 0.85rem;
  color: var(--white);
}
.reveal summary::-webkit-details-marker { display: none; }
.reveal summary:hover { background: rgba(242, 242, 242, 0.06); }
.reveal__tag {
  font-weight: 700;
  color: var(--black);
  background: var(--grey);
  padding: 0.05rem 0.5rem;
  font-size: 0.72rem;
}
.reveal[open] .reveal__tag { background: var(--red); }
.reveal__body {
  padding: 0 0.8rem 0.7rem;
  font-size: 0.85rem;
  color: var(--grey);
}

/* --- Two-column key/value list --------------------------------------------- */

.kv {
  margin: 0;
  display: grid;
  gap: 1.2rem;
}
.kv-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.4rem;
  border-bottom: 1px solid #2a2a2a;
  padding: 0 4px 1.3rem;
}
.kv-row:last-child { border-bottom: none; padding-bottom: 0; }
.kv-row dt { font-weight: 700; color: var(--white); font-size: 0.95rem; }
.kv-row dd { margin: 0; color: var(--grey); font-size: 0.9rem; line-height: 1.65; }

/* --- Code / install steps --------------------------------------------------- */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.6rem;
}
.step { display: grid; gap: 0.6rem; }
.step__key {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--yellow);
  font-size: 0.85rem;
}
.step h3 { margin: 0; font-size: 1.02rem; color: var(--white); font-weight: 700; }

.code-block-wrap {
  position: relative;
}

.code-block {
  margin: 0;
  padding: 0.9rem 5.2rem 0.9rem 1rem;
  border: 1px solid var(--grey);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.65;
  overflow-x: auto;
  color: var(--white);
  background: var(--black);
}

.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
  background: var(--black);
  border: 1px solid var(--grey);
  padding: 0.3rem 0.55rem;
  cursor: pointer;
}
.copy-btn:hover { border-color: var(--white); }
.copy-btn:focus-visible { outline: 2px solid var(--yellow); outline-offset: 2px; }
.copy-btn--done { color: var(--black); background: var(--green); border-color: var(--green); }
.code-block .kw { color: var(--blue); }
.code-block .str { color: var(--yellow); }
.code-block .cm { color: var(--grey); }
.code-block .prompt { color: var(--cyan); }

/* --- Provenance stamp -------------------------------------------------------- */

.stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--grey);
  border: 1px solid var(--grey);
  padding: 0.2rem 0.55rem;
  margin-top: 0.8rem;
}
.stamp::before { content: "\2713"; color: var(--green); font-weight: 700; }

/* --- Footer ------------------------------------------------------------------ */

.foot {
  border-top: 2px solid var(--white);
  padding: clamp(2rem, 5vh, 3rem) var(--gap);
}
.foot__inner {
  max-width: var(--shell);
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--grey);
}
.foot__inner p { margin: 0 0 0.5rem; }
.foot__fine { font-size: 0.78rem; }

/* --- Reduced motion / small screens ------------------------------------------ */

@media (max-width: 30rem) {
  .data-page__figures { grid-template-columns: 1fr; }
  .figure { border-right: none; border-bottom: 1px solid var(--grey); }
  .figure:last-child { border-bottom: none; }
  .dp-row { grid-template-columns: minmax(0, 1fr) 4.5rem; grid-template-areas: "id status" "kind kind"; row-gap: 0.05rem; }
  .dp-row__id { grid-area: id; }
  .dp-row__kind { grid-area: kind; font-size: 0.72rem; }
  .dp-row__unit { display: none; }
  .dp-row__status--present, .dp-row__status--absent { grid-area: status; }
}