/* Public info page (about.html): a long read in the receiver's style. */
.about {
  max-width: 980px;
  margin: 0 auto;
  padding: 14px 16px 40px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  line-height: 1.6;
  font-size: 0.95rem;
  color: #c9d2df;
}
.about b { color: var(--text); font-weight: 600; }
.about a { color: var(--cyan); }
.about a:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
.about .brand-link { text-decoration: none; color: var(--text); }
.about .chip-link { text-decoration: none; color: var(--amber-hi); border-color: rgba(255, 159, 28, 0.45); }
.about .chip-link:hover { box-shadow: 0 0 12px var(--amber-glow); }

.hero { padding: 26px 28px; }
.hero h1 {
  margin: 8px 0 14px;
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  line-height: 1.2;
  font-weight: 600;
  color: var(--text);
}
.hero p { margin: 0 0 10px; max-width: 70ch; }
.about .key-link { display: inline-block; color: var(--amber-hi); border-color: rgba(255, 159, 28, 0.6); }
.hero-btn { margin-top: 8px; }

.toc { padding: 16px 22px; }
.toc ol {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
  columns: 3 200px;
  column-gap: 24px;
}
.toc li { counter-increment: toc; break-inside: avoid; }
.toc li::before {
  content: counter(toc, decimal-leading-zero);
  color: var(--amber);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  margin-right: 8px;
}
.toc a { color: #c9d2df; text-decoration: none; }
.toc a:hover { color: var(--text); text-decoration: underline; }

.sec { scroll-margin-top: 12px; }
.sec h2 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 18px 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text);
}
.sec h2 span { color: var(--amber); font-size: 0.78rem; letter-spacing: 0.16em; }
.sec p { margin: 0 0 12px; max-width: 75ch; }

.steps { margin: 0; padding: 0; list-style: none; counter-reset: step; display: grid; gap: 10px; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 12px 16px 12px 52px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 16px; top: 11px;
  width: 24px; height: 24px;
  display: grid; place-items: center;
  border-radius: 3px;
  background: var(--amber);
  color: #1b0f00;
  font-weight: 700;
  font-size: 0.8rem;
}
.pill {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 1px 7px;
  border-radius: 3px;
  background: var(--amber);
  color: #1b0f00;
}

.plain { margin: 0 0 12px; padding-left: 18px; }
.plain li { margin-bottom: 8px; }
.plain li::marker { color: var(--amber); }

.parts { margin: 0 0 12px; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.parts > div { display: grid; grid-template-columns: 170px 1fr; gap: 16px; padding: 10px 16px; background: var(--panel); }
.parts dt { font-size: 0.74rem; letter-spacing: 0.16em; color: var(--amber-hi); text-transform: uppercase; padding-top: 3px; }
.parts dd { margin: 0; }

.cols { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; align-items: start; margin-bottom: 12px; }
.cols-phone { grid-template-columns: minmax(0, 1fr) 260px; }

/* screenshots; without an <img> the dashed box says which one goes here */
.shot { margin: 0 0 14px; }
.shot img, .shot-ph {
  display: block;
  width: 100%;
  aspect-ratio: var(--ratio, 16 / 9);
  border: 1px solid var(--line-hi);
  border-radius: 6px;
  background: var(--panel);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
.shot img { height: auto; object-fit: cover; }
.shot-ph {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 18px;
  border-style: dashed;
  text-align: center;
  font-size: 0.78rem;
  color: var(--dim);
  min-height: 90px;
}
.shot-ph b { color: var(--amber-hi); letter-spacing: 0.12em; font-size: 0.72rem; }
.shot figcaption { margin-top: 6px; font-size: 0.78rem; color: var(--dim); }

.tbl-about { width: 100%; border-collapse: collapse; font-size: 0.86rem; margin-bottom: 12px; }
.tbl-about th {
  text-align: left;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--dim);
  padding: 6px 10px;
  border-bottom: 1px solid var(--line-hi);
}
.tbl-about td { padding: 7px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.keys-tbl td:first-child { white-space: nowrap; width: 40%; }

.about kbd, .about code {
  font-family: var(--font);
  font-size: 0.78rem;
  padding: 0 5px;
  border: 1px solid var(--line-hi);
  border-radius: 4px;
  color: var(--text);
}
.about kbd { border-bottom-width: 2px; }
.about code { color: var(--cyan); }

.about-foot { margin-top: 18px; text-align: center; color: var(--dim); font-size: 0.8rem; }
.about-foot p { margin: 12px 0 0; letter-spacing: 0.08em; }

@media (max-width: 760px) {
  .hero { padding: 20px 18px; }
  .cols, .cols-phone { grid-template-columns: minmax(0, 1fr); }
  .shot-phone { max-width: 260px; }
  .parts > div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .keys-tbl td:first-child { white-space: normal; }
}