/* BuildTube — about page. Builds on first-look.css (tokens, header, footer, buttons). */

.about .top-stamp { font-weight: 500; color: var(--ink-2); }
.about .top-link[aria-current="page"] { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.about-back { height: 38px; padding: 0 16px; font-size: 14px; gap: 7px; white-space: nowrap; }
.about-back-short { display: none; }

.about-main { max-width: 820px; padding-top: 56px; }
.about-kicker { font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.about-hero h1 { margin-top: 14px; font: 400 clamp(38px, 5.2vw, 60px)/1.02 var(--serif); letter-spacing: -.015em; text-wrap: balance; }
.about-lead { margin-top: 22px; font-size: 18px; line-height: 1.6; color: var(--ink-2); max-width: 66ch; }

.about-toc { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.about-toc a {
  display: inline-flex; align-items: center; height: 36px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); text-decoration: none; font-size: 14px; font-weight: 500; color: var(--ink-2);
}
.about-toc a:hover { border-color: #c9c6bb; color: var(--ink); }

.about-sec { margin-top: 60px; scroll-margin-top: 84px; }
.about-sec h2 { font: 400 36px/1.08 var(--serif); letter-spacing: -.012em; margin-bottom: 18px; }
.about-sec > p { font-size: 16.5px; line-height: 1.65; color: var(--ink-2); max-width: 68ch; }
.about-sec > p + p { margin-top: 18px; }
.about-sec > .about-credit { margin: -6px 0 18px; font-weight: 500; color: var(--ink); }
.about-sec a { color: var(--accent); text-underline-offset: 3px; }
.about-sec .btn { color: var(--paper); }

.about-steps { margin: 0; padding: 0; list-style: none; counter-reset: step; display: grid; gap: 16px; }
.about-steps li {
  counter-increment: step; position: relative; padding: 18px 20px 18px 62px; border-radius: 16px;
  background: var(--card); box-shadow: 0 0 0 1px var(--line); font-size: 15.5px; line-height: 1.6; color: var(--ink-2);
}
.about-steps li::before {
  content: counter(step); position: absolute; left: 20px; top: 16px;
  font: italic 400 28px/1 var(--serif); color: var(--accent);
}
.about-steps b { display: block; color: var(--ink); font-weight: 600; margin-bottom: 2px; }

.about-callout {
  margin-top: 20px !important; padding: 16px 18px; border-radius: 14px; font-size: 15px !important;
  background: color-mix(in srgb, var(--accent) 7%, var(--card));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
}
.about-callout strong { color: var(--ink); }

.about-dl { margin: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.about-dl > div { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 8px 24px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.about-dl dt { margin: 0; }
.about-dl dd { margin: 0; font-size: 15.5px; line-height: 1.6; color: var(--ink-2); }
.about-tag {
  display: inline-flex; align-items: center; min-height: 28px; padding: 3px 11px; border-radius: 999px;
  font-size: 13px; font-weight: 600; background: var(--card); box-shadow: 0 0 0 1px var(--line); color: var(--ink);
}
.about-tag--rise { color: var(--accent); }
.about-tag--em { background: var(--paper-2); }
.about-tag--jev { color: #135c52; background: #e5ede7; box-shadow: none; }
.about-tag--try { color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, transparent); box-shadow: none; }

.about-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.about-list li { position: relative; padding-left: 22px; font-size: 15.5px; line-height: 1.6; color: var(--ink-2); max-width: 70ch; }
.about-list li::before { content: ''; position: absolute; left: 3px; top: .72em; width: 7px; height: 7px; border-radius: 50%; background: var(--accent-soft); }
.about-list b { color: var(--ink); font-weight: 600; }

@media (max-width: 640px) {
  .about .top-stamp, .about .top-link { display: none; }
  .about-back { height: 36px; padding: 0 12px; font-size: 13.5px; }
  .about-back-full { display: none; }
  .about-back-short { display: inline; }
  .about-main { padding-top: 34px; }
  .about-lead { font-size: 16.5px; }
  .about-sec { margin-top: 46px; }
  .about-sec h2 { font-size: 30px; }
  .about-dl > div { grid-template-columns: minmax(0, 1fr); }
  .about-steps li { padding: 16px 16px 16px 50px; }
  .about-steps li::before { left: 16px; }
}