/* ============================================================
   tokens
   ============================================================ */
:root {
  --bg: #ffffff;
  --bg-2: #f4f4f2;
  --bg-3: #ececea;
  --fg: #0a0a0b;
  --fg-2: #3a3a3f;
  --fg-3: #707078;
  --line: #e2e2de;
  --line-2: #c8c8c2;

  --accent-h: 220;
  --accent-c: 0.12;
  --accent: oklch(0.55 var(--accent-c) var(--accent-h));
  --accent-soft: oklch(0.55 var(--accent-c) var(--accent-h) / 0.22);
  --accent-faint: oklch(0.55 var(--accent-c) var(--accent-h) / 0.08);

  --serif: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --sans: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --pad-x: clamp(20px, 4vw, 56px);
}

:root[data-motion="off"] .reveal { opacity: 1 !important; transform: none !important; }
:root[data-motion="off"] * { transition-duration: 0.001s !important; animation: none !important; }

* { box-sizing: border-box; }
html, body { background: var(--bg); color: var(--fg); margin: 0; padding: 0; }
body {
  font-family: var(--mono);
  -webkit-font-smoothing: antialiased;
  font-size: 14px;
  line-height: 1.6;
  letter-spacing: 0.005em;
  overflow-x: hidden;
  min-height: 100vh;
}

/* JetBrains Mono everywhere — strip serif/italic flourishes */
.serif, .italic { font-family: var(--mono) !important; font-style: normal !important; }
a { color: inherit; text-decoration: none; }
button { background: none; border: 0; padding: 0; color: inherit; font: inherit; cursor: pointer; }

::selection { background: var(--accent-soft); color: var(--fg); }

.serif { font-family: var(--serif); }
.italic { font-style: italic; }

/* ============================================================
   page chrome
   ============================================================ */
.page {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  z-index: 1;
}
.page > * { position: relative; z-index: 2; }
.page main { position: relative; z-index: 2; }
.page--home { min-height: 100vh; }

.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 50; opacity: 0.04;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.6 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

.reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s cubic-bezier(.2,.7,.2,1), transform 0.7s cubic-bezier(.2,.7,.2,1);
}
.reveal.is-armed { opacity: 0; transform: translateY(14px); }
.reveal.is-shown { opacity: 1; transform: none; }

/* topbar */
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--pad-x);
  background: linear-gradient(to bottom, rgba(255,255,255,0.92), rgba(255,255,255,0.7));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-2);
}
.topbar__left { display: flex; align-items: center; gap: 10px; }
.mark {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px;
  border: 1px solid var(--line-2);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--fg);
  font-style: normal;
}
.topbar__sep { color: var(--fg-3); }
.topbar__name { color: var(--fg); letter-spacing: 0.04em; }
.topbar__nav { display: flex; gap: 22px; }
.topbar__nav a { transition: color .2s; position: relative; padding: 4px 0; }
.topbar__nav a:hover { color: var(--accent); }
.topbar__nav a.is-here { color: var(--fg); }
.topbar__nav a.is-here::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px;
  background: var(--accent);
}
.topbar__right { display: flex; align-items: center; gap: 8px; font-variant-numeric: tabular-nums; }
.dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-faint);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px var(--accent-faint); }
  50%       { box-shadow: 0 0 0 6px transparent; }
}
@media (max-width: 760px) {
  .topbar__nav { gap: 14px; }
  .topbar__right { display: none; }
}

/* footer */
.foot {
  display: flex; justify-content: space-between; align-items: center;
  padding: 26px var(--pad-x);
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  margin-top: auto;
  flex-wrap: wrap;
  gap: 12px;
}
.foot__right { display: flex; align-items: center; gap: 10px; }
.foot__pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}

.caret {
  display: inline-block;
  width: 0.06em; height: 0.5em;
  background: var(--accent);
  margin-left: 0.06em;
  vertical-align: 0.12em;
  animation: blink 1.1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ============================================================
   HOME
   ============================================================ */
.home {
  flex: 1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: clamp(40px, 6vh, 80px) var(--pad-x) 60px;
  position: relative;
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
}
.home::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 50% 35% at 50% 35%, var(--accent-faint), transparent 70%);
  z-index: 0;
}
.home > * { position: relative; }

.home__eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  margin-bottom: 28px;
}
.home__eyebrow > span:first-child { color: var(--accent); margin-right: 6px; }
.home__sep { margin: 0 8px; color: var(--fg-3); }

.home__title {
  font-family: var(--mono);
  font-weight: 500;
  font-style: normal;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 36px;
  color: var(--fg);
  padding-bottom: 0.1em;
}
.home__title .italic { font-style: normal; font-weight: 500; color: var(--fg); }
.home__title span { color: var(--fg) !important; }

.home__tagline {
  max-width: 540px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--fg-2);
  margin: 0 auto 36px;
  text-wrap: pretty;
}

/* portrait block */
.portrait {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin: 0 auto 56px;
}
.portrait__frame {
  position: relative;
  width: clamp(180px, 24vw, 240px);
  height: clamp(220px, 30vw, 300px);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-3);
  display: grid;
  place-items: center;
}
.portrait__img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.15) contrast(1.05);
  transition: filter 0.4s, transform 0.6s;
}
.portrait__frame:hover .portrait__img { filter: none; transform: scale(1.02); }

.portrait__placeholderText {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--fg-3);
  font-family: var(--mono);
  text-align: center;
  padding: 16px;
}
.portrait__placeholderText span {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 500;
  color: var(--fg-2);
  letter-spacing: -0.04em;
}
.portrait__placeholderText small { font-size: 10px; line-height: 1.4; opacity: 0.7; }
.portrait__frame--placeholder .portrait__placeholderText { display: flex; }

/* corner ticks */
.portrait__corner {
  position: absolute;
  width: 12px; height: 12px;
  border-color: var(--accent);
  border-style: solid;
  border-width: 0;
}
.portrait__corner--tl { top: 6px; left: 6px; border-top-width: 1px; border-left-width: 1px; }
.portrait__corner--tr { top: 6px; right: 6px; border-top-width: 1px; border-right-width: 1px; }
.portrait__corner--bl { bottom: 6px; left: 6px; border-bottom-width: 1px; border-left-width: 1px; }
.portrait__corner--br { bottom: 6px; right: 6px; border-bottom-width: 1px; border-right-width: 1px; }

.portrait__caption {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.06em;
  display: inline-flex; align-items: center; gap: 8px;
}
.portrait__captionDot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-faint);
}

.home__title { margin: 0 0 22px; }

/* chooser */
.chooser {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  align-items: stretch;
  width: 100%;
  max-width: 760px;
  margin: 0 auto 56px;
}

.chooser__divider {
  position: relative;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  width: 24px;
}
.chooser__divider::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%;
  width: 1px; background: var(--line);
}
.chooser__divider span {
  position: relative; z-index: 1;
  background: var(--bg);
  padding: 6px 0;
}

@media (max-width: 760px) {
  .chooser { grid-template-columns: 1fr; }
  .chooser__divider { width: 100%; height: 24px; }
  .chooser__divider::before { left: 0; right: 0; top: 50%; bottom: auto; width: auto; height: 1px; }
}

.tile {
  position: relative;
  display: flex; flex-direction: column;
  text-align: left;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  min-height: 240px;
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(.2,.7,.2,1), border-color 0.3s, background 0.3s;
}
.tile::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(circle at 50% 100%, var(--accent-faint), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s;
}
.tile.is-hover {
  transform: translateY(-4px);
  border-color: var(--line-2);
  background: var(--bg-2);
}
.tile.is-hover::after { opacity: 1; }

.tile__top {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  margin-bottom: 12px;
}
.tile__count { color: var(--accent); font-feature-settings: "tnum"; }
.tile__label { color: var(--fg-2); }

.tile__center {
  display: grid; place-items: center;
  margin: 2px 0 12px;
}
.tile__kana {
  font-family: var(--mono);
  font-style: normal;
  font-weight: 500;
  font-size: clamp(24px, 3.5vw, 38px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--fg);
}

.tile__preview {
  display: flex; flex-direction: column; gap: 4px;
  margin-bottom: 12px;
  flex: 1;
  min-height: 0;
}
.tile__row {
  display: flex; align-items: baseline; gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  padding: 4px 0;
  border-top: 1px dashed var(--line);
}
.tile__row:first-child { border-top: 0; }
.tile__rowDot { color: var(--accent); flex-shrink: 0; }
.tile__rowDot::before { content: "›"; }
.tile__rowText {
  color: var(--fg-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.tile__bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-2);
}
.tile__arrow {
  display: inline-block;
  color: var(--fg-3);
  transition: transform 0.3s, color 0.3s;
  font-size: 16px;
}
.tile__arrow.is-hover { transform: translateX(6px); color: var(--accent); }

/* socials row on home */
.home__socials {
  display: flex; flex-wrap: wrap; gap: 22px;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
}
.home__social {
  display: inline-flex; gap: 8px; align-items: baseline;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
.home__social:hover { border-color: var(--accent); color: var(--fg); }
.home__socialL { color: var(--fg-3); text-transform: uppercase; letter-spacing: 0.08em; font-size: 10px; }
.home__socialH { color: var(--fg-2); }

/* ============================================================
   DETAIL pages (papers / projects)
   ============================================================ */
.detail {
  flex: 1;
  padding: clamp(40px, 8vh, 100px) var(--pad-x) 100px;
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
}

.back {
  display: inline-flex;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-3);
  margin-bottom: 32px;
  transition: color 0.2s, transform 0.3s;
}
.back:hover { color: var(--accent); transform: translateX(-3px); }

.detail__eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  margin-bottom: 18px;
}
.detail__eyebrow > span:first-child { color: var(--accent); margin-right: 6px; }

.detail__title {
  font-family: var(--mono);
  font-style: normal;
  font-weight: 500;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 18px;
  padding-bottom: 0.08em;
  color: var(--fg);
  max-width: 880px;
}

.detail__lede {
  max-width: 600px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--fg-2);
  margin: 0 0 40px;
  text-wrap: pretty;
}

/* filterbar */
.filterbar {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-bottom: 36px;
  font-family: var(--mono);
}
.filterbar__btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  color: var(--fg-2);
  letter-spacing: 0.04em;
  text-transform: lowercase;
  transition: all 0.2s;
}
.filterbar__btn:hover { border-color: var(--line-2); color: var(--fg); }
.filterbar__btn.is-active {
  border-color: var(--accent-soft);
  color: var(--accent);
  background: var(--accent-faint);
}
.filterbar__count {
  font-size: 10px;
  color: var(--fg-3);
  font-feature-settings: "tnum";
}
.filterbar__btn.is-active .filterbar__count { color: var(--accent); opacity: 0.7; }

/* ============================================================
   papers list (used on papers.html)
   ============================================================ */
.papers__list { border-top: 1px solid var(--line); }
.paper--detail { transition: background 0.3s; background: var(--bg-2); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; }
.paper--detail.is-open { background: var(--bg-3); }
.paper__hit {
  display: grid;
  grid-template-columns: 60px 200px 1fr auto;
  gap: 28px;
  align-items: baseline;
  width: 100%;
  padding: 22px 16px;
  text-align: left;
  position: relative;
  transition: padding 0.3s, background 0.3s;
}
.paper__hit::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px; background: var(--accent);
  transform: scaleY(0); transform-origin: center;
  transition: transform 0.4s cubic-bezier(.2,.7,.2,1);
}
.paper__hit:hover { background: var(--bg-2); }
.paper__hit:hover::before { transform: scaleY(1); }
.paper--detail.is-open .paper__hit::before { transform: scaleY(1); }

.paper__id {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.05em;
}

.paper__meta {
  display: flex; flex-direction: column; gap: 4px;
  font-family: var(--mono);
  font-size: 11px;
}
.paper__year { color: var(--fg); }
.paper__venue { color: var(--fg-3); }
.paper__status {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 3px;
  margin-top: 2px;
  align-self: flex-start;
}
.paper__status--published { color: var(--accent); border: 1px solid var(--accent-soft); }
.paper__status--preprint { color: var(--fg-2); border: 1px solid var(--line-2); }
.paper__status--draft { color: var(--fg-3); border: 1px dashed var(--line-2); }

.paper__body { min-width: 0; }
.paper__title {
  font-family: var(--mono);
  font-style: normal;
  font-weight: 500;
  font-size: clamp(14px, 1.3vw, 16px);
  line-height: 1.45;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--fg);
  text-wrap: pretty;
}
.paper__authors {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-3);
  margin: 0;
}

.paper__actions {
  display: flex; align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-2);
}
.paper__chev {
  display: inline-grid; place-items: center;
  width: 28px; height: 28px;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  font-size: 14px;
  color: var(--fg-2);
  transition: all 0.25s;
}
.paper__hit:hover .paper__chev { border-color: var(--accent); color: var(--accent); }
.paper__chev.is-open { background: var(--accent); color: #ffffff; border-color: var(--accent); }

.paper__expand {
  padding: 0 16px 28px;
  display: grid;
  grid-template-columns: 60px 200px 1fr auto;
  gap: 28px;
  animation: expand 0.4s cubic-bezier(.2,.7,.2,1);
}
@keyframes expand {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}
.paper__abstract {
  grid-column: 3 / 4;
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--fg-2);
  max-width: 680px;
  text-wrap: pretty;
}
.paper__links {
  grid-column: 3 / 4;
  display: flex; flex-wrap: wrap; gap: 18px;
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 12px;
}
.paper__links a {
  color: var(--fg-2);
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.paper__links a:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 800px) {
  .paper__hit { grid-template-columns: 1fr auto; gap: 10px; padding: 18px 12px; }
  .paper__id { display: none; }
  .paper__meta { grid-row: 1; flex-direction: row; gap: 12px; flex-wrap: wrap; }
  .paper__body { grid-column: 1 / -1; }
  .paper__actions { grid-column: 2; grid-row: 1; }
  .paper__expand { grid-template-columns: 1fr; padding: 0 12px 22px; }
  .paper__abstract, .paper__links { grid-column: 1; }
}

/* ============================================================
   project grid
   ============================================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (max-width: 760px) {
  .projects__grid { grid-template-columns: 1fr; }
}

.project {
  display: flex; flex-direction: column; gap: 16px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s cubic-bezier(.2,.7,.2,1), border-color 0.3s, background 0.3s;
  position: relative;
  overflow: hidden;
  min-height: 230px;
}
.project::after {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.project:hover {
  transform: translateY(-3px);
  border-color: var(--line-2);
  background: var(--bg-2);
}
.project:hover::after { opacity: 1; }

.project__top {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.06em;
}
.project__id { color: var(--accent); }
.project__tag { text-transform: lowercase; }

.project__name {
  font-family: var(--mono);
  font-style: normal;
  font-weight: 500;
  font-size: 22px;
  margin: 0;
  color: var(--fg);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  letter-spacing: -0.03em;
}
.project__caret {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--fg-3);
  font-style: normal;
  transition: transform 0.3s, color 0.3s;
}
.project__caret.is-hover { transform: translate(4px, -4px); color: var(--accent); }

.project__blurb {
  font-size: 13px;
  color: var(--fg-2);
  margin: 0;
  line-height: 1.65;
  flex: 1;
  text-wrap: pretty;
}

.project__foot {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  gap: 12px;
  flex-wrap: wrap;
}
.project__stack { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  padding: 3px 8px;
  border: 1px solid var(--line-2);
  border-radius: 4px;
  font-size: 10px;
  color: var(--fg-2);
  letter-spacing: 0.05em;
}
.project__stats { display: flex; gap: 8px; }
.project__cta { color: var(--accent); transition: transform 0.3s; }
.project:hover .project__cta { transform: translateX(2px); }
.project__soon, .paper__soon {
  color: var(--fg-3);
  font-style: italic;
  letter-spacing: 0.04em;
}

/* ============================================================
   paper CTA buttons
   ============================================================ */
.paper__cta {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
  padding-bottom: 2px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.paper__cta:hover { border-color: var(--accent); color: var(--fg); }
.paper__sublink {
  font-size: 11px !important;
  color: var(--fg-3) !important;
  border-bottom: 1px dashed var(--line-2) !important;
}

/* ============================================================
   Viewer modal
   ============================================================ */
.viewer {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10, 10, 12, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: grid; place-items: center;
  padding: clamp(16px, 4vw, 48px);
  animation: viewerIn 0.25s ease;
}
@keyframes viewerIn { from { opacity: 0; } to { opacity: 1; } }

.viewer__panel {
  width: 100%;
  max-width: 1100px;
  height: 100%;
  max-height: 880px;
  display: flex; flex-direction: column;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.18);
  animation: panelIn 0.3s cubic-bezier(.2,.7,.2,1);
}
@keyframes panelIn {
  from { opacity: 0; transform: translateY(12px) scale(0.99); }
  to   { opacity: 1; transform: none; }
}

.viewer__bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-2);
  background: var(--bg-3);
  flex-shrink: 0;
}
.viewer__title {
  display: flex; align-items: center; gap: 8px;
  min-width: 0;
}
.viewer__title > span:last-child {
  color: var(--fg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.viewer__kind {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--accent-soft);
  border-radius: 4px;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  flex-shrink: 0;
}
.viewer__sep { color: var(--fg-3); }
.viewer__barRight { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }

.viewer__dl {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  border-bottom: 1px dashed var(--line-2);
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
}
.viewer__dl:hover { color: var(--accent); border-color: var(--accent); }
.viewer__dl--big {
  font-size: 13px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
  padding-bottom: 2px;
  margin-top: 18px;
}

.viewer__close {
  display: inline-grid; place-items: center;
  width: 28px; height: 28px;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  font-size: 13px;
  color: var(--fg-2);
  cursor: pointer;
  transition: all 0.2s;
}
.viewer__close:hover { border-color: var(--accent); color: var(--accent); }

.viewer__body {
  flex: 1;
  min-height: 0;
  display: flex;
  background: var(--bg-3);
}
.viewer__frame {
  flex: 1;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--bg-3);
}
.viewer__empty {
  flex: 1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 10px;
  color: var(--fg-3);
  font-family: var(--mono);
  font-size: 13px;
}
.viewer__emptyMark {
  font-size: 48px;
  color: var(--fg-3);
  opacity: 0.3;
  margin-bottom: 6px;
}
.viewer__emptyText { letter-spacing: 0.04em; }

/* ============================================================
   single paper full-display page
   ============================================================ */
.paper-full { max-width: 1100px; }
.paper-full__header { margin-bottom: 28px; }
.paper-full__meta {
  display: flex; gap: 8px; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}
.paper-full__title {
  font-family: var(--mono);
  font-weight: 500;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 0 0 10px;
  text-wrap: pretty;
}
.paper-full__authors {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-2);
  margin: 0 0 18px;
}
.paper-full__abstract {
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-2);
  margin: 0 0 18px;
  max-width: 720px;
  text-wrap: pretty;
}
.paper-full__links {
  display: flex; gap: 18px; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 12px;
}
.paper-full__viewer {
  width: 100%;
  height: 80vh;
  min-height: 600px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-3);
}
.paper-full__frame { width: 100%; height: 100%; border: 0; background: var(--bg-3); }
.paper-full__empty {
  padding: 80px;
  text-align: center;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--fg-3);
  font-family: var(--mono);
  font-size: 13px;
}

/* hide blinking caret completely */
.caret { display: none !important; }