/* ============================================================
   whitepaper.css — shared styles for the /whitepaper section
   Imported after tokens.css + nav.css on every paper page.
   ============================================================ */

/* Paper-page local tokens — derived from research page palette */
:root {
  --wp-fg:   #0c0c0c;
  --wp-fg2:  #4a4a4a;
  --wp-fg3:  #999;
  --wp-bg:   #f6f6f4;
  --wp-bg2:  #eeeeec;
  --wp-rule: rgba(0,0,0,0.08);
  --wp-rule2:rgba(0,0,0,0.15);
}
[data-theme="dark"] {
  --wp-fg:   #eaeaea;
  --wp-fg2:  #999;
  --wp-fg3:  #555;
  --wp-bg:   #060606;
  --wp-bg2:  #101010;
  --wp-rule: rgba(255,255,255,0.07);
  --wp-rule2:rgba(255,255,255,0.14);
}

body.wp-body {
  background: var(--wp-bg);
  color: var(--wp-fg);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  transition: background .4s, color .4s;
  padding-top: 44px;       /* clear the fixed shared nav */
  padding-bottom: 36px;    /* clear the fixed contact bar */
}

/* ── INDEX (landing) ─────────────────────────────────────── */
.wp-page { max-width: 1100px; margin: 0 auto; padding: 64px 48px 96px; }
.wp-header { margin-bottom: 48px; }
.wp-eyebrow {
  font-family: var(--mono);
  font-size: 10px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--wp-fg3);
  margin-bottom: 12px;
}
.wp-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700; letter-spacing: -.02em;
  color: var(--wp-fg); margin-bottom: 14px;
}
.wp-sub {
  font-size: 14px; color: var(--wp-fg2); max-width: 640px; line-height: 1.7;
}
.wp-rule { height: 1px; background: var(--wp-rule); margin: 36px 0 32px; }

/* ── LIBRARY / DOCUMENT LIST ──────────────────────────────
   Each paper is a row in a stacked archive listing — left:
   call number + icon, middle: title/abstract/meta, right:
   date + arrow.  No cards; hairline rules between entries.
   ─────────────────────────────────────────────────────── */
.wp-shelf-head {
  display: grid;
  grid-template-columns: 80px 1fr 130px;
  gap: 28px;
  padding: 0 24px 14px;
  font-family: var(--mono);
  font-size: 8px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--wp-fg3);
  border-bottom: 1px solid var(--wp-rule2);
}
.wp-shelf-head .wp-h-r { text-align: right; }

.wp-list { display: flex; flex-direction: column; }
.wp-doc {
  display: grid;
  grid-template-columns: 80px 1fr 130px;
  gap: 28px;
  padding: 28px 24px;
  border-bottom: 1px solid var(--wp-rule);
  color: inherit;
  position: relative;
  transition: background .2s;
}
.wp-doc:hover { background: var(--wp-bg2); }
/* The row-spanning paper link sits under everything; the Documentation
   link sits on top so its clicks aren't swallowed. */
.wp-doc-cover {
  position: absolute; inset: 0;
  z-index: 0;
  text-decoration: none;
}
.wp-doc-mark, .wp-doc-body, .wp-doc-right {
  position: relative; z-index: 1;
  pointer-events: none;       /* clicks pass through to the cover link */
}
/* Re-enable pointer events on the specific elements that need them */
.wp-doc-docs-link { pointer-events: auto; }

.wp-doc-mark {
  display: flex; flex-direction: column;
  gap: 10px; align-items: flex-start;
}
.wp-doc-mark svg {
  width: 30px; height: 38px;
  color: var(--wp-fg3); opacity: .55;
  transition: color .2s, opacity .2s;
}
.wp-doc:hover .wp-doc-mark svg { color: var(--wp-fg); opacity: .9; }
.wp-doc-call {
  font-family: var(--mono);
  font-size: 9px; letter-spacing: .16em;
  color: var(--wp-fg3); text-transform: uppercase;
}

.wp-doc-body {}
.wp-doc-title {
  font-family: "Times New Roman", serif;
  font-size: 17px; font-weight: 700;
  line-height: 1.35; letter-spacing: -.005em;
  color: var(--wp-fg); margin-bottom: 8px;
}
.wp-doc-abstract {
  font-size: 12.5px; line-height: 1.7;
  color: var(--wp-fg2); margin-bottom: 14px;
}
.wp-doc-meta {
  font-family: var(--mono);
  font-size: 9px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--wp-fg3);
}
.wp-doc-meta span + span::before {
  content: '  ·  '; opacity: .55;
}

/* Documentation cross-link — sits visually on top of the paper cover-link */
.wp-doc-docs {
  margin-top: 10px;
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 9px; letter-spacing: .14em;
  text-transform: uppercase;
}
.wp-doc-docs-rule {
  flex: 0 0 18px; height: 1px;
  background: var(--wp-fg3); opacity: .5;
}
.wp-doc-docs-link {
  color: var(--wp-fg2);
  text-decoration: none;
  border-bottom: 1px solid var(--wp-rule2);
  padding-bottom: 1px;
  transition: color .2s, border-color .2s;
}
.wp-doc-docs-link:hover {
  color: var(--wp-fg);
  border-color: var(--wp-fg);
}

.wp-doc-right {
  display: flex; flex-direction: column;
  justify-content: space-between; align-items: flex-end;
  gap: 8px;
}
.wp-doc-date {
  font-family: var(--mono);
  font-size: 10px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--wp-fg3);
}
.wp-doc-arrow {
  font-family: var(--mono);
  font-size: 14px; color: var(--wp-fg3);
  transition: transform .2s, color .2s;
}
.wp-doc:hover .wp-doc-arrow {
  color: var(--wp-fg);
  transform: translateX(4px);
}

@media (max-width: 768px) {
  /* Drop the column-header strip on mobile — labels don't fit on a phone */
  .wp-shelf-head { display: none; }
  .wp-list { border-top: 1px solid var(--wp-rule); }

  /* Re-flow row into a 2-row grid: header (mark + date), then body */
  .wp-doc {
    grid-template-columns: auto 1fr auto;
    grid-template-areas:
      "mark . date"
      "body body body";
    gap: 10px 12px;
    padding: 18px 6px;
  }
  .wp-doc-mark {
    grid-area: mark;
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }
  .wp-doc-mark svg { width: 22px; height: 28px; }
  .wp-doc-call { font-size: 8.5px; letter-spacing: .12em; }

  .wp-doc-body { grid-area: body; }
  .wp-doc-title { font-size: 15px; line-height: 1.3; }
  .wp-doc-abstract { font-size: 12px; line-height: 1.65; margin-bottom: 10px; }
  .wp-doc-meta { font-size: 8.5px; letter-spacing: .1em; }
  .wp-doc-meta span + span::before { content: ' · '; }

  .wp-doc-right {
    grid-area: date;
    flex-direction: row;
    align-items: center;
  }
  .wp-doc-arrow { display: none; }

  .wp-doc-docs { margin-top: 10px; font-size: 8.5px; }
}

/* ── PAPER VIEWER ────────────────────────────────────────── */
.paper-doc {
  max-width: 940px;
  margin: 0 auto;
  padding: 64px 60px 140px;
}
.ax-hdr {
  border-bottom: 1px solid var(--wp-fg3);
  padding-bottom: 22px; margin-bottom: 28px;
}
.ax-title {
  font-size: 23px; font-weight: 700;
  letter-spacing: -.015em; line-height: 1.2;
  color: var(--wp-fg); margin-bottom: 16px;
  font-family: "Times New Roman", serif;
}
.ax-authors {
  font-size: 14px; color: var(--wp-fg2);
  font-family: "Times New Roman", serif; margin-bottom: 8px;
}
.ax-affil {
  font-size: 12px; color: var(--wp-fg3);
  font-family: "Times New Roman", serif;
  font-style: italic; margin-bottom: 12px;
}
.ax-meta { display: flex; gap: 24px; flex-wrap: wrap; }
.ax-meta span {
  font-size: 11px; color: var(--wp-fg3); letter-spacing: .05em;
}
.paper-abstract {
  margin-bottom: 24px;
  border: .5px solid var(--wp-rule2);
  padding: 20px 24px;
}
.abs-lbl {
  font-size: 12px; font-weight: 700;
  text-align: center; margin-bottom: 12px;
  font-family: "Times New Roman", serif; color: var(--wp-fg);
}
.abs-txt {
  font-size: 12px; line-height: 1.75; color: var(--wp-fg2);
  font-family: "Times New Roman", serif; text-align: justify;
}
.abs-txt strong { color: var(--wp-fg); }
.paper-body {
  columns: 2; column-gap: 40px;
  font-family: "Times New Roman", serif;
}
.psec { break-inside: avoid-column; margin-bottom: 16px; }
.psec-t {
  font-size: 13px; font-weight: 700;
  letter-spacing: .03em; text-transform: uppercase;
  color: var(--wp-fg); margin-bottom: 10px;
  font-family: "Times New Roman", serif;
}
.psec-s {
  font-size: 12px; font-weight: 700;
  font-style: italic; color: var(--wp-fg);
  margin-bottom: 8px; font-family: "Times New Roman", serif;
}
.pp {
  font-size: 12px; line-height: 1.76; color: var(--wp-fg2);
  font-family: "Times New Roman", serif;
  text-align: justify; margin-bottom: 12px;
}
.pp strong { color: var(--wp-fg); }
.pcite { font-size: 10px; vertical-align: super; color: var(--wp-fg3); }
.peq {
  font-size: 13px; font-style: italic; color: var(--wp-fg);
  text-align: center; margin: 14px 0; display: block;
  font-family: "Times New Roman", serif;
}
.pfig {
  border: .5px solid var(--wp-rule2);
  margin: 14px 0; break-inside: avoid; column-span: all;
}
.pfig-in { padding: 20px; background: var(--wp-bg2); }
.pfig-cap {
  font-size: 10px; color: var(--wp-fg2);
  padding: 10px 14px; border-top: .5px solid var(--wp-rule);
  font-style: italic; line-height: 1.5;
  font-family: "Times New Roman", serif;
}
.ptable {
  width: 100%; border-collapse: collapse;
  font-size: 11px; margin: 12px 0; break-inside: avoid;
}
.ptable caption {
  font-size: 10px; font-style: italic; color: var(--wp-fg2);
  margin-bottom: 6px; text-align: left;
  font-family: "Times New Roman", serif;
}
.ptable th {
  font-weight: 700; padding: 4px 10px;
  border-top: 1px solid var(--wp-fg2);
  border-bottom: .5px solid var(--wp-fg2);
  color: var(--wp-fg); text-align: left;
}
.ptable td {
  padding: 4px 10px; color: var(--wp-fg2);
  border-bottom: .5px solid var(--wp-rule);
}
.ptable .tbot td { border-bottom: 1px solid var(--wp-fg2); }
.prefs { column-span: all; margin-top: 24px; }
.prefs-t {
  font-size: 13px; font-weight: 700;
  text-transform: uppercase; color: var(--wp-fg);
  margin-bottom: 12px;
  border-top: .5px solid var(--wp-rule2);
  padding-top: 14px;
  font-family: "Times New Roman", serif;
}
.pref {
  font-size: 11px; color: var(--wp-fg2); line-height: 1.65;
  margin-bottom: 9px; font-family: "Times New Roman", serif;
  padding-left: 26px; text-indent: -26px;
}

/* SketchProc3D-style data table + full-bleed figure (used in some papers) */
.dtable {
  width: 100%; border-collapse: collapse;
  font-size: 11px; margin: 16px 0;
  column-span: all; break-inside: avoid;
}
.dtable th {
  font-size: 9px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--wp-fg3); padding: 8px 12px; text-align: left;
  border-bottom: .5px solid var(--wp-rule2);
}
.dtable td {
  padding: 8px 12px; color: var(--wp-fg2);
  border-bottom: .5px solid var(--wp-rule);
  vertical-align: top; line-height: 1.5;
}
.dtable td:first-child { color: var(--wp-fg); font-weight: 500; }
.dtable tr.hl td { color: var(--wp-fg); font-weight: 600; }
.fig-bleed {
  margin: 24px -40px; padding: 28px 40px;
  background: var(--wp-bg2);
  border-top: .5px solid var(--wp-rule);
  border-bottom: .5px solid var(--wp-rule);
  column-span: all; break-inside: avoid;
}
.fig-cap {
  font-size: 10px; color: var(--wp-fg3);
  margin-top: 12px; font-style: italic;
}

/* Paper top meta bar */
.wp-paper-bar {
  position: sticky; top: 44px; z-index: 100;
  background: var(--wp-bg);
  border-bottom: .5px solid var(--wp-rule);
  padding: 0 60px; height: 40px;
  display: flex; align-items: center; justify-content: space-between;
}
.wp-paper-bar-lbl {
  font-family: var(--mono);
  font-size: 10px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--wp-fg3);
}
.wp-paper-bar-r {
  display: flex; align-items: center; gap: 22px;
}
.wp-paper-bar-back, .wp-paper-bar-docs {
  font-family: var(--mono);
  font-size: 10px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--wp-fg3);
  text-decoration: none;
  transition: color .2s;
}
.wp-paper-bar-back:hover, .wp-paper-bar-docs:hover { color: var(--wp-fg); }

@media (max-width: 768px) {
  .wp-page { padding: 36px 18px 64px; }
  .paper-doc { padding: 36px 20px 96px; }
  .paper-body { columns: 1; }
  .wp-paper-bar { padding: 0 14px; height: 36px; }
  .wp-paper-bar-lbl { display: none; }
  .wp-paper-bar-r { gap: 14px; }
  .wp-paper-bar-back, .wp-paper-bar-docs { font-size: 9px; letter-spacing: .1em; }
}