/* Home page hero: the Rail layout, promoted from hero/rail-search/ after Hayden picked it.
   Scoped under .opt-rail-search, the class on the hero section. */

/* Option D2: Rail, brain searches. Every rule is scoped under .opt-rail-search */
.opt-rail-search{
  --rw:min(460px,100%);
  --rl-pad:max(var(--gutter),calc((100vw - var(--max))/2));
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--rule);
}
.opt-rail-search .rl-stage{
  position:relative;
  min-height:min(80vh,800px);
  display:grid;
  align-content:center;
  padding:clamp(28px,5vw,56px) var(--rl-pad);
  overflow:hidden;
}

/* brain backdrop */
.opt-rail-search .rl-brain{
  position:absolute;
  inset:0;
  z-index:0;
  opacity:.46;
  transition:opacity .45s var(--ease);
}
.opt-rail-search .rl-brain .preview-stage{
  position:absolute;
  inset:0;
  height:100%;
}
:root[data-theme="dark"] .opt-rail-search .rl-brain{opacity:.55}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .opt-rail-search .rl-brain{opacity:.55}
}

/* the name card: a solid surface, not a wash. It is the first thing the eye lands on. */
.opt-rail-search .rl-copy{
  position:relative;
  z-index:2;
  max-width:min(60ch,calc(100% - 492px));
  justify-self:start;
  padding:clamp(22px,3vw,32px) clamp(22px,3vw,34px) clamp(24px,3vw,34px);
  border:1px solid var(--rule-2);
  border-radius:16px;
  background:color-mix(in srgb,var(--paper) 94%,transparent);
  -webkit-backdrop-filter:saturate(1.15) blur(14px);
  backdrop-filter:saturate(1.15) blur(14px);
  box-shadow:var(--shadow),0 40px 90px -50px color-mix(in srgb,var(--ink) 60%,transparent);
  transition:opacity .35s var(--ease);
}
.opt-rail-search .rl-copy .lead{margin-top:20px;color:var(--ink)}
.opt-rail-search .rl-copy .intro{margin-top:18px;color:var(--ink-2);font-size:16.5px}
.opt-rail-search .rl-copy .display{letter-spacing:-.01em}
.opt-rail-search .rl-cta{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:24px}
.opt-rail-search .rl-copy .cta{display:flex;gap:12px;flex-wrap:wrap;margin:0}
/* Resume keeps its own weight; the second link is deliberately quieter than it */
.opt-rail-search .rl-copy .cta .btn{border-color:var(--ink-2);color:var(--ink);font-weight:600}
.opt-rail-search .rl-second{
  color:var(--ink-2);
  border-color:color-mix(in srgb,var(--rule-2) 80%,transparent);
  font-weight:500;
}
.opt-rail-search .rl-second:hover{color:var(--ink);border-color:var(--ink)}
.opt-rail-search .rl-copy .btn{min-height:44px}
.opt-rail-search .rl-copy .meta{margin-top:22px;font-family:var(--mono);font-size:12.5px;color:var(--muted);display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.opt-rail-search .rl-copy .meta a{min-height:40px;display:inline-flex;align-items:center}
.opt-rail-search .rl-copy .meta a:hover{color:var(--ink)}
.opt-rail-search .portrait{margin-bottom:20px}

/* the one wrapper that lives in the copy at rest and in the rail when open */
.opt-rail-search .rl-askslot{margin-top:22px}
.opt-rail-search .rl-ask{display:flex;flex-direction:column;gap:10px}
.opt-rail-search .askbar{margin:0;max-width:100%}
.opt-rail-search .askbar input{min-height:48px;font-size:16px}
.opt-rail-search .askbar .btn{min-height:48px}
.opt-rail-search .qchips{margin-top:0}
.opt-rail-search .qchip{min-height:40px;display:inline-flex;align-items:center}
.opt-rail-search .qchip:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* live match readout: what the brain is narrowing to while he types */
.opt-rail-search .rl-match{
  display:grid;
  gap:5px;
  padding:10px 12px;
  border:1px solid color-mix(in srgb,var(--rule) 85%,transparent);
  border-radius:12px;
  background:color-mix(in srgb,var(--paper) 60%,transparent);
  opacity:0;
  transform:translateY(-3px);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.opt-rail-search .rl-match.on{opacity:1;transform:none}
.opt-rail-search .rl-match .rl-n{
  font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);
}
.opt-rail-search .rl-match .rl-t{
  font-size:13.5px;color:var(--ink-2);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.opt-rail-search .rl-match .rl-t::before{content:"· ";color:var(--accent)}

/* the elements vault.js looks for, present but never seen */
.opt-rail-search .rl-vhook{display:none}

/* the rail */
.opt-rail-search .rl-rail{
  position:absolute;
  top:0;right:0;bottom:0;
  width:var(--rw);
  z-index:5;
  display:flex;
  flex-direction:column;
  min-height:0;
  background:var(--paper);
  border-left:1px solid var(--rule-2);
  visibility:hidden;
  opacity:0;
  transform:translateX(14px);
  transition:transform .34s var(--ease),opacity .24s var(--ease),visibility .34s;
}
.opt-rail-search.rail-open .rl-rail{visibility:visible;opacity:1;transform:none}
.opt-rail-search.rail-open .rl-copy{opacity:.55}
.opt-rail-search.rail-open .rl-brain{opacity:.26}

.opt-rail-search .rl-head{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  padding:8px 10px;
  border-bottom:1px solid var(--rule);
  flex:0 0 auto;
}
.opt-rail-search .rl-close{
  width:40px;height:40px;
  display:grid;place-items:center;
  border:1px solid var(--rule-2);
  border-radius:10px;
  background:transparent;
  color:var(--ink);
  font-size:20px;line-height:1;
  cursor:pointer;
}
.opt-rail-search .rl-close:hover{border-color:var(--ink)}

/* the thread scrolls inside the rail, never the page */
.opt-rail-search .asklog{
  flex:1 1 auto;
  min-height:0;
  margin-top:0;
  padding:16px;
  overflow-y:auto;
  overscroll-behavior:contain;
  -webkit-overflow-scrolling:touch;
}
.opt-rail-search .asklog .msg.ai{font-size:15.5px}
.opt-rail-search .asklog .msg.user{max-width:min(40ch,90%)}
.opt-rail-search .asklog .pulled{margin-top:2px}

.opt-rail-search .rl-foot{
  flex:0 1 auto;
  display:flex;
  flex-direction:column;
  gap:10px;
  /* never let the footer eat the thread: it caps itself and scrolls inside */
  max-height:min(58%,300px);
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:12px 16px calc(14px + env(safe-area-inset-bottom));
  border-top:1px solid var(--rule);
  background:var(--paper);
}
/* the input row itself never shrinks or scrolls away */
.opt-rail-search .rl-foot .askbar{flex:0 0 auto}
@media (max-height:560px){
  .opt-rail-search .rl-head{padding:4px 8px}
  .opt-rail-search .rl-foot{gap:8px;padding:8px 12px calc(10px + env(safe-area-inset-bottom))}
  .opt-rail-search .asklog{padding:12px}
}
.opt-rail-search .rl-foot .askfine{margin-top:0}
/* in the rail the chips sit above the input, the live matches stay against it */
.opt-rail-search.rail-open .rl-foot .rl-ask{flex-direction:column-reverse}

/* below 1081px a 460px rail would sit on top of the copy, so the rail takes the
   whole stage: one surface at a time, and the copy stays put underneath, dimmed */
@media (max-width:1080px){
  .opt-rail-search .rl-copy{max-width:60ch}
  .opt-rail-search .rl-rail{left:0;right:0;width:100%;border-left:0}
}

/* phone: the brain gets its own band across the top, the copy sits under it on a
   solid card, and asking replaces the copy entirely with a full sheet */
@media (max-width:760px){
  .opt-rail-search .rl-stage{
    min-height:auto;
    align-content:start;
    padding:calc(34dvh + 18px) var(--gutter) clamp(24px,7vw,36px);
  }
  .opt-rail-search .rl-brain{
    bottom:auto;
    height:34dvh;
    opacity:.85;
  }
  :root[data-theme="dark"] .opt-rail-search .rl-brain{opacity:.9}
  @media (prefers-color-scheme:dark){
    :root:not([data-theme="light"]) .opt-rail-search .rl-brain{opacity:.9}
  }
  /* the band fades into the page instead of ending on a hard line */
  .opt-rail-search .rl-brain::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:0;
    height:38%;
    pointer-events:none;
    background:linear-gradient(to bottom,transparent,var(--paper));
  }
  .opt-rail-search .rl-copy{
    /* phone measure: never wider than the card needs, so the line length holds */
    max-width:min(100%,22rem);
    background:color-mix(in srgb,var(--paper) 97%,transparent);
    padding:clamp(18px,5vw,24px);
  }
  .opt-rail-search .rl-copy .intro{font-size:15.5px}
  /* two buttons, one column, both the full width of the card */
  .opt-rail-search .rl-cta{flex-direction:column;align-items:stretch;gap:8px}
  .opt-rail-search .rl-cta .cta{display:block}
  .opt-rail-search .rl-cta .btn{width:100%;justify-content:center}
  .opt-rail-search .asklog{padding:14px}

  /* asking: one surface only. The copy is replaced, the sheet is the screen. */
  .opt-rail-search.rail-open .rl-stage{
    min-height:76dvh;
    padding:0;
  }
  .opt-rail-search.rail-open .rl-copy{display:none}
  .opt-rail-search.rail-open .rl-brain{display:none}
  .opt-rail-search .rl-rail{
    top:0;left:0;right:0;bottom:0;
    width:100%;
    border-left:0;
    transform:translateY(16px);
  }
  .opt-rail-search.rail-open .rl-rail{transform:none}
  .opt-rail-search .rl-foot{max-height:min(64%,340px)}
}

@media (prefers-reduced-motion:reduce){
  .opt-rail-search .rl-rail,
  .opt-rail-search .rl-copy,
  .opt-rail-search .rl-match,
  .opt-rail-search .rl-brain{transition:none}
  .opt-rail-search .rl-rail{transform:none}
}


/* FIX (blocker found in verification): the ask input was inside .rl-foot, which is a
   capped scroller, with the chips stacked above it. Once the chip block grew past the
   cap the input slid below the fold of a nested scroller nothing signals, on phone and
   desktop both. That is the exact complaint this layout exists to solve, so the input
   must never live inside a scrolling box. The footer no longer scrolls; the chips do,
   as a single row. */
.opt-rail-search .rl-foot{max-height:none;overflow:visible}
.opt-rail-search.rail-open .rl-foot .rl-chips{
  max-height:44px;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.opt-rail-search.rail-open .rl-foot .rl-chips::-webkit-scrollbar{display:none}
.opt-rail-search.rail-open .rl-foot .rl-chips .qchips{flex-wrap:nowrap}
.opt-rail-search.rail-open .rl-foot .rl-chips .qchip{flex:0 0 auto}
.opt-rail-search .rl-foot .askbar{flex:0 0 auto;position:relative;z-index:1}


/* LIGHT THEME CONTRAST FIX.

   Two things made the light theme unreadable while the dark one looked right.
   Opening the rail dimmed the whole copy block with opacity:.55, which on a dark
   background reads as "recessed" but on cream turns near-black text into pale grey.
   And the brain was tuned against a dark backdrop, so the same opacity that reads as
   a constellation on black almost disappears on paper.

   Text contrast is never adjusted with opacity here. The copy block stays fully
   opaque in light; the rail is already a separate surface, which is what signals
   which one is active. Dark keeps a gentle dim because it can afford one. */

.opt-rail-search.rail-open .rl-copy{opacity:1}
.opt-rail-search .rl-brain{opacity:.66}
.opt-rail-search.rail-open .rl-brain{opacity:.44}

:root[data-theme="dark"] .opt-rail-search.rail-open .rl-copy{opacity:.78}
:root[data-theme="dark"] .opt-rail-search .rl-brain{opacity:.55}
:root[data-theme="dark"] .opt-rail-search.rail-open .rl-brain{opacity:.26}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .opt-rail-search.rail-open .rl-copy{opacity:.78}
  :root:not([data-theme="light"]) .opt-rail-search .rl-brain{opacity:.55}
  :root:not([data-theme="light"]) .opt-rail-search.rail-open .rl-brain{opacity:.26}
}

/* the card needs to sit on solid paper in light, not on a translucent wash, or the
   graph shows through the intro paragraph */
.opt-rail-search .rl-copy{background:var(--paper)}
:root[data-theme="dark"] .opt-rail-search .rl-copy{background:color-mix(in srgb,var(--paper) 92%,transparent)}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .opt-rail-search .rl-copy{background:color-mix(in srgb,var(--paper) 92%,transparent)}
}


/* The rail must be an opaque surface, not a tint. In dark the graph showing faintly
   through it reads as depth; in light it made the answer text unreadable against the
   nodes. Raising it out of the brain's stacking context and painting it solid. */
.opt-rail-search .rl-rail{
  z-index:20;
  isolation:isolate;
  background:var(--paper);
}
:root[data-theme="dark"] .opt-rail-search .rl-rail{background:color-mix(in srgb,var(--paper) 96%,transparent)}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .opt-rail-search .rl-rail{background:color-mix(in srgb,var(--paper) 96%,transparent)}
}