/* ================================================================= *
 * Grain · Use-case detail pages — story view
 * loaded after ../landing-manus.css
 * ================================================================= */

.uc-hero { padding: 72px 0 40px; }
.uc-back { display: inline-block; font-size: 13px; color: var(--muted); margin-bottom: 30px; }
.uc-back:hover { color: var(--ink); }
.uc-hero .eyebrow code {
  font-family: var(--font-mono); text-transform: none; letter-spacing: 0;
  font-size: 12px; background: var(--cream-deep); border-radius: 5px;
  padding: 2px 8px; color: var(--rust); font-weight: 500;
}
.uc-hero h1 { font-size: clamp(32px, 4.2vw, 54px); max-width: 22ch; margin-top: 20px; }
.uc-hook { margin: 24px 0 0; font-size: 17px; color: var(--ink-soft); max-width: 68ch; line-height: 1.65; text-wrap: pretty; }

/* ---------- story stages ---------- */
.story { padding: 24px 0 80px; }
.stage {
  display: grid; grid-template-columns: 340px minmax(0, 620px); gap: 48px;
  padding: 56px 0; border-top: 1px solid var(--line-soft);
  align-items: start;
}
.stage__label > span { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--rust); }
.stage__label > b { display: block; font-family: var(--font-display); font-weight: 400; font-size: 26px; letter-spacing: -.01em; margin-top: 12px; line-height: 1.2; }
.stage__label > p { margin: 12px 0 0; font-size: 14px; color: var(--muted); line-height: 1.7; text-wrap: pretty; }
.stage__label > p + p { margin-top: 10px; }
.stage__label > p b { color: var(--ink-soft); font-weight: 600; }

.panel {
  background: var(--white); border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 22px 48px -32px rgba(0,0,0,.16);
  overflow: hidden;
}

/* stage 1 — intake */
.in-card { padding: 24px 26px; }
.in-req {
  margin: 0; font-family: var(--font-display); font-style: italic;
  font-size: 18px; line-height: 1.5; color: var(--ink); text-wrap: pretty;
}
.in-req::before { content: "\201C"; color: var(--muted); }
.in-req::after { content: "\201D"; color: var(--muted); }
.in-files { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.in-foot {
  margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .04em; color: var(--muted);
}
.in-trig {
  margin-top: 16px; padding-top: 15px; border-top: 1px dashed var(--line);
  display: flex; flex-wrap: wrap; gap: 7px; align-items: center;
}
.in-trig > b {
  font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--rust); font-weight: 500; margin-right: 5px;
}

/* stage 2 — fan out */
.fan { padding: 24px 26px 26px; }
.fan__root {
  display: flex; justify-content: center;
}
.fan__root b {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  color: var(--white); background: var(--ink); border-radius: 999px; padding: 7px 16px;
}
.fan__root b::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--rust); }
.fan__stem { width: 1px; height: 20px; background: var(--line); margin: 0 auto; }
.fan__bar { height: 1px; background: var(--line); margin: 0 15% ; }
.fan__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }
.act { border: 1px solid var(--line-soft); border-radius: 12px; padding: 14px 16px; background: var(--cream-light); min-width: 0; }
.act__head { display: flex; align-items: center; gap: 9px; }
.act__head::before { content: ""; width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.act--ok .act__head::before { background: var(--ok); }
.act--warn .act__head::before { background: var(--rust); }
.act--run .act__head::before { background: var(--rust); animation: pulse 2s ease infinite; }
@media (prefers-reduced-motion: reduce) { .act--run .act__head::before { animation: none; } }
.act__head b { font-size: 13px; font-weight: 600; color: var(--ink); letter-spacing: -.01em; }
.act > span { display: block; font-family: var(--font-mono); font-size: 11px; color: var(--muted); margin-top: 7px; line-height: 1.55; }
.act--warn > span { color: var(--rust); }

/* stage 3 — extracted facts + checks */
.ex__head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  padding: 13px 22px; border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted);
}
.ex__head b { color: var(--ink); font-weight: 500; }
.ex__body { padding: 10px 24px 16px; }
.ex__body .kv dt { font-family: var(--font-mono); }
.checks { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line-soft); }
.checks__col { padding: 16px 22px 20px; min-width: 0; }
.checks__col + .checks__col { border-left: 1px solid var(--line-soft); }
.checks__col > b {
  display: block; font-family: var(--font-mono); font-size: 10px;
  letter-spacing: .1em; text-transform: uppercase; font-weight: 500;
}
.checks__col--ok > b { color: var(--ok); }
.checks__col--bad > b { color: var(--rust); }
.checks__col ul { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 9px; }
.checks__col li { position: relative; padding-left: 20px; font-size: 12.5px; color: var(--ink-soft); line-height: 1.5; text-wrap: pretty; }
.checks__col li::before { position: absolute; left: 0; top: 0; font-family: var(--font-mono); font-size: 11px; }
.checks__col--ok li::before { content: "\2713"; color: var(--ok); }
.checks__col--bad li::before { content: "\2715"; color: var(--rust); }

/* stage 4 — output packet tree */
.tree { padding: 18px 24px 20px; font-family: var(--font-mono); font-size: 11.5px; line-height: 2; color: var(--ink-soft); overflow-x: auto; }
.tree .t-line { display: flex; gap: 16px; align-items: baseline; min-width: 0; }
.tree .t-path { white-space: pre; flex-shrink: 0; }
.tree .t-path b { color: var(--ink); font-weight: 500; }
.tree .t-note { color: var(--muted); font-size: 10.5px; line-height: 1.5; }
.tree .t-line--dim .t-path { color: var(--muted); }
.tree .t-line--bad .t-path b { color: var(--rust); }
.tree .t-line--bad .t-note { color: var(--rust); }
.tree__foot {
  border-top: 1px solid var(--line-soft); padding: 12px 24px 14px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .03em; color: var(--muted); line-height: 1.7;
}

/* stage 4 — output-packet carousel */
.pk__stage { display: grid; }
.pk__slide {
  grid-area: 1 / 1; min-width: 0; display: flex; flex-direction: column;
  opacity: 0; pointer-events: none; transition: opacity .45s ease;
}
.pk__slide.is-on { opacity: 1; pointer-events: auto; }
@media (prefers-reduced-motion: reduce) { .pk__slide { transition: none; } }
.pk__bar {
  display: flex; justify-content: space-between; align-items: baseline; gap: 14px;
  padding: 9px 24px; background: var(--cream-light); border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .04em; color: var(--muted);
}
.pk__bar b { color: var(--ink); font-weight: 500; }
.pk__bar em { font-style: normal; color: var(--rust); letter-spacing: .08em; flex-shrink: 0; }
.pk__dots { display: flex; gap: 7px; justify-content: center; padding: 12px 0 14px; border-top: 1px solid var(--line-soft); }
.pk__dot {
  width: 7px; height: 7px; border-radius: 50%; padding: 0; cursor: pointer;
  border: 1px solid var(--line); background: var(--cream-deep);
  transition: background .3s ease, border-color .3s ease;
}
.pk__dot.is-on { background: var(--rust); border-color: var(--rust); }

/* letter view */
.pk__doc { padding: 20px 26px 22px; font-size: 12.5px; line-height: 1.65; color: var(--ink-soft); }
.pk__doc h4 { margin: 0; font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; color: var(--ink); }
.pk__meta { font-family: var(--font-mono); font-size: 10px; color: var(--muted); margin-top: 5px; }
.pk__doc p { margin: 11px 0 0; text-wrap: pretty; }
.pk__sig { margin-top: 15px; padding-top: 11px; border-top: 1px dashed var(--line); font-family: var(--font-mono); font-size: 10px; color: var(--muted); }

/* email view */
.pk__mailhead { padding: 13px 26px 12px; border-bottom: 1px solid var(--line-soft); display: grid; gap: 5px; }
.pk__mailhead div { display: flex; gap: 10px; align-items: baseline; font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-soft); min-width: 0; }
.pk__mailhead b { width: 38px; flex-shrink: 0; color: var(--muted); font-weight: 500; font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
.pk__mailbody { padding: 16px 26px 20px; font-size: 12.5px; line-height: 1.65; color: var(--ink-soft); }
.pk__mailbody p { margin: 0; text-wrap: pretty; }
.pk__attach { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }

/* csv view */
.pk__csv { padding: 4px 26px 16px; overflow-x: auto; }
.pk__csv table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 11px; }
.pk__csv th {
  text-align: left; font-weight: 500; font-size: 9px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--muted); padding: 11px 14px 8px 0; border-bottom: 1px solid var(--line);
}
.pk__csv td { padding: 8px 14px 8px 0; border-bottom: 1px solid var(--line-soft); color: var(--ink-soft); }
.pk__csv th.num, .pk__csv td.num { text-align: right; }
.pk__csv tr.flag td { color: var(--rust); }
.pk__csv tfoot td { border-bottom: 0; color: var(--ink); }

/* stage 3 — review */
.rev__head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 13px 22px; border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted);
}
.rev__head b { color: var(--ink); font-weight: 500; }
.rev__body { padding: 22px 24px; }
.rev__find { margin: 0; font-family: var(--font-display); font-size: 20px; line-height: 1.35; letter-spacing: -.01em; color: var(--ink); text-wrap: pretty; }
.thread { display: grid; gap: 10px; margin-top: 20px; }
.msg { max-width: 88%; border-radius: 13px; padding: 11px 15px; font-size: 13px; line-height: 1.55; }
.msg i { display: block; font-style: normal; font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 5px; }
.msg--grain { background: var(--cream-light); border: 1px solid var(--line-soft); justify-self: start; color: var(--ink-soft); }
.msg--grain i { color: var(--rust); }
.msg--human { background: var(--ink); color: #F5F0EE; justify-self: end; }
.msg--human i { color: color-mix(in srgb, #F5F0EE 55%, transparent); }
.rev__composer {
  display: flex; align-items: center; gap: 10px; margin-top: 16px;
}
.rev__composer span {
  flex: 1; min-width: 0; border: 1px solid var(--line); border-radius: 999px;
  padding: 9px 16px; font-size: 12.5px; color: var(--muted);
  background: var(--cream-light); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.rev__composer b {
  font-size: 12.5px; font-weight: 600; color: #fff; background: var(--ink);
  border-radius: 999px; padding: 9px 18px; flex-shrink: 0; cursor: pointer;
}
.rev__acts {
  display: flex; flex-wrap: wrap; gap: 8px; padding: 16px 24px; border-top: 1px solid var(--line-soft);
}
.rev__meta {
  padding: 0 24px 16px; font-family: var(--font-mono); font-size: 10px;
  letter-spacing: .03em; color: var(--muted); line-height: 1.7;
}
.act-btn {
  font-family: var(--font-sans); font-size: 12.5px; font-weight: 500;
  border-radius: 999px; padding: 8px 18px; cursor: pointer;
  border: 1px solid var(--line); background: var(--white); color: var(--ink-soft);
}
.act-btn--go { background: var(--rust); border-color: var(--rust); color: #fff; }

/* keeps-watch strip */
.watch { padding: 0 0 90px; }
.watch__card {
  border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  background: var(--white); box-shadow: 0 22px 48px -32px rgba(0,0,0,.16);
  display: grid; grid-template-columns: minmax(240px, 320px) 1fr;
}
.watch__sleep {
  padding: 30px 32px; background: var(--cream-light);
  border-right: 1px dashed var(--line);
}
.watch__pulse {
  display: block; width: 9px; height: 9px; border-radius: 50%;
  background: var(--rust); margin-bottom: 18px;
  animation: watch-breathe 3.4s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) { .watch__pulse { animation: none; } }
@keyframes watch-breathe {
  0%, 100% { opacity: .3; transform: scale(.75); }
  50% { opacity: 1; transform: scale(1); }
}
.watch__sleep b {
  display: block; font-family: var(--font-display); font-weight: 400;
  font-size: 24px; letter-spacing: -.01em; line-height: 1.2; color: var(--ink);
}
.watch__sleep p { margin: 10px 0 0; font-size: 13px; color: var(--muted); line-height: 1.65; text-wrap: pretty; }
.watch__wake { padding: 26px 30px 24px; min-width: 0; }
.watch__wake > b {
  display: block; font-family: var(--font-mono); font-size: 10px;
  letter-spacing: .1em; text-transform: uppercase; color: var(--rust); font-weight: 500;
}
.watch__wake ul { list-style: none; margin: 8px 0 0; padding: 0; }
.watch__wake li {
  display: flex; align-items: baseline; gap: 12px;
  padding: 10px 0; font-size: 13.5px; color: var(--ink-soft); line-height: 1.5;
  border-top: 1px solid var(--line-soft); text-wrap: pretty;
}
.watch__wake li:first-child { border-top: 0; }
.watch__wake li::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0;
  border: 1.5px solid var(--rust); align-self: center;
}

@media (max-width: 900px) {
  .stage { grid-template-columns: 1fr; gap: 24px; padding: 44px 0; }
  .fan__grid { grid-template-columns: 1fr; }
  .checks { grid-template-columns: 1fr; }
  .checks__col + .checks__col { border-left: 0; border-top: 1px solid var(--line-soft); }
  .msg { max-width: 100%; }
  .watch__card { grid-template-columns: 1fr; }
  .watch__sleep { border-right: 0; border-bottom: 1px dashed var(--line); }
}
@media (max-width: 620px) {
  .uc-hero { padding: 48px 0 28px; }
  .in-card, .fan, .rev__body { padding: 18px 18px; }
  .rev__acts { padding: 14px 18px; }
}