:root {
  --md-sys-color-surface: #f3f6f4;
  --md-sys-color-surface-container: #ffffff;
  --md-sys-color-surface-container-high: #e9efeb;
  --md-sys-color-on-surface: #15201b;
  --md-sys-color-on-surface-variant: #4f5d56;
  --md-sys-color-outline: #d0dbd4;
  --md-sys-color-primary: #0b6e56;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-secondary-container: #d4ebe3;
  --md-sys-color-on-secondary-container: #12352c;
  --md-elevation-1: 0 1px 2px rgba(21,32,27,.07), 0 1px 3px 1px rgba(21,32,27,.05);
  --md-elevation-2: 0 4px 12px rgba(21,32,27,.1), 0 1px 3px rgba(21,32,27,.06);
  --md-radius: 14px;
  --md-font: "DM Sans", system-ui, sans-serif;
  --md-mono: "IBM Plex Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--md-font);
  color: var(--md-sys-color-on-surface);
  background:
    radial-gradient(900px 420px at 8% -10%, rgba(11,110,86,.14), transparent 60%),
    radial-gradient(700px 360px at 92% 0%, rgba(30,77,123,.08), transparent 55%),
    var(--md-sys-color-surface);
  line-height: 1.45;
}
.wrap { width: min(1080px, calc(100% - 2rem)); margin-inline: auto; }

.appbar {
  background:
    linear-gradient(135deg, #0a5f4a 0%, #0b6e56 48%, #0d7a5f 100%);
  color: #f3faf7;
  padding: 1.7rem 0 1.4rem;
  box-shadow: var(--md-elevation-2);
}
.appbar-inner {
  display: flex; justify-content: space-between; gap: 1.5rem; align-items: end;
}
.eyebrow {
  margin: 0 0 .4rem; font-size: .72rem; letter-spacing: .14em;
  text-transform: uppercase; opacity: .82; font-weight: 500;
}
h1 {
  margin: 0; font-size: clamp(1.75rem, 3.8vw, 2.5rem); font-weight: 700; letter-spacing: -.03em;
}
.lead { margin: .55rem 0 0; max-width: 42rem; opacity: .9; font-size: .98rem; font-weight: 400; }
.stats { display: flex; gap: .7rem; }
.stat {
  min-width: 78px; text-align: center; background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.16); border-radius: 14px; padding: .55rem .7rem;
  backdrop-filter: blur(6px);
}
.stat strong { display: block; font-size: 1.25rem; }
.stat span { font-size: .72rem; opacity: .85; }

.toolbar {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in srgb, var(--md-sys-color-surface) 86%, white);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--md-sys-color-outline);
  padding: .85rem 0 .95rem;
}
.search-row input {
  width: 100%; border: 1px solid var(--md-sys-color-outline); background: var(--md-sys-color-surface-container);
  border-radius: 28px; padding: .95rem 1.15rem; font: inherit;
  box-shadow: var(--md-elevation-1);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.search-row input:focus {
  outline: 2px solid color-mix(in srgb, var(--md-sys-color-primary) 45%, white);
  border-color: var(--md-sys-color-primary);
}
.chips { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .7rem; }
.chip {
  border: 1px solid color-mix(in srgb, var(--chip, var(--md-sys-color-primary)) 28%, white);
  background: color-mix(in srgb, var(--chip, var(--md-sys-color-primary)) 12%, white);
  color: var(--md-sys-color-on-surface); border-radius: 999px; padding: .38rem .8rem;
  font-size: .82rem; font-weight: 500; cursor: pointer;
  transition: transform .12s ease, background .12s ease, color .12s ease;
}
.chip:hover { transform: translateY(-1px); }
.chip.active {
  background: var(--chip, var(--md-sys-color-primary)); color: #fff; border-color: transparent;
  box-shadow: var(--md-elevation-1);
}
.filters {
  display: grid; grid-template-columns: repeat(6, minmax(0,1fr));
  gap: .65rem; margin-top: .8rem; align-items: end;
}
@media (max-width: 900px) {
  .appbar-inner { flex-direction: column; align-items: start; }
  .filters { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
.m3-field { display: grid; gap: .28rem; font-size: .74rem; color: var(--md-sys-color-on-surface-variant); font-weight: 500; }
.m3-field select {
  border: 1px solid var(--md-sys-color-outline); background: var(--md-sys-color-surface-container);
  border-radius: 12px; padding: .62rem .75rem; font: inherit; color: var(--md-sys-color-on-surface);
}
.m3-btn {
  border: 0; border-radius: 999px; padding: .7rem 1rem; font: inherit; font-weight: 600; cursor: pointer;
}
.m3-btn.tonal {
  background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container);
}

.year-block { margin: 1.5rem 0 1.9rem; }
.year-block h2 {
  margin: 0 0 .9rem; font-size: 1.12rem; font-weight: 700;
  color: var(--md-sys-color-on-surface-variant);
  display: flex; align-items: center; gap: .55rem;
}
.year-block h2::after {
  content: ""; flex: 1; height: 1px; background: var(--md-sys-color-outline); opacity: .7;
}
.cards { display: grid; gap: .9rem; }
.card {
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-radius);
  padding: 1.05rem 1.15rem 1rem;
  box-shadow: var(--md-elevation-1);
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
  animation: rise .35s ease both;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--md-elevation-2);
  border-color: color-mix(in srgb, var(--md-sys-color-primary) 28%, var(--md-sys-color-outline));
}
@keyframes rise {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.card h3 {
  margin: 0; font-size: 1.05rem; font-weight: 700; line-height: 1.3; letter-spacing: -.015em;
}
.card h3 a { color: inherit; text-decoration: none; }
.card h3 a:hover { color: var(--md-sys-color-primary); }
.authors {
  margin: .4rem 0 .2rem; color: var(--md-sys-color-on-surface-variant);
  font-size: .88rem; line-height: 1.35; font-weight: 500;
}
.venue-full {
  margin: .2rem 0 .55rem; color: var(--md-sys-color-on-surface-variant); font-size: .9rem;
}
.meta-line {
  display: flex; flex-wrap: wrap; gap: .35rem .45rem; align-items: center; margin-bottom: .55rem;
}
.mchip {
  display: inline-flex; align-items: center; border-radius: 8px;
  padding: .2rem .55rem; font-size: .73rem; font-weight: 600;
  background: var(--md-sys-color-surface-container-high); color: var(--md-sys-color-on-surface-variant);
}
.mchip.cat { background: var(--cat, var(--md-sys-color-primary)); color: #fff; }
.split-badge {
  display: inline-flex; align-items: stretch; overflow: hidden;
  border-radius: 8px; font-size: .73rem; font-weight: 700;
  line-height: 1; box-shadow: inset 0 0 0 1px rgba(20,40,70,.08);
}
.split-badge .sb-left,
.split-badge .sb-right {
  display: inline-flex; align-items: center; padding: .28rem .55rem;
}
.split-badge .sb-left { background: #1e4d7b; color: #fff; }
.split-badge .sb-right { background: #d7e8f8; color: #1e4d7b; }
.doi-row { margin: 0 0 .55rem; font-size: .88rem; }
.doi-row a { color: var(--md-sys-color-primary); text-decoration: none; font-weight: 600; }
.doi-row a:hover { text-decoration: underline; }
.doi-text {
  margin-left: .4rem; color: var(--md-sys-color-on-surface-variant);
  font-family: var(--md-mono); font-size: .8rem;
}
.kw {
  display: grid; gap: .4rem; margin-top: .15rem;
}
.kw-row { display: flex; flex-wrap: wrap; gap: .3rem; }
.kw strong {
  font-size: .68rem; letter-spacing: .05em; text-transform: uppercase;
  color: var(--md-sys-color-on-surface-variant); font-weight: 700;
}
.tag {
  border-radius: 999px; padding: .16rem .5rem; font-size: .74rem; font-weight: 500;
  background: #e8f1ec; color: #355348;
}
.tag.meta { background: #eef1f4; color: #46525c; }
.card-foot {
  display: flex; justify-content: space-between; gap: .8rem; align-items: center;
  margin-top: .9rem; padding-top: .75rem; border-top: 1px solid var(--md-sys-color-outline);
}
.status {
  display: inline-flex; align-items: center; gap: .45rem;
  font-size: .8rem; font-weight: 700;
  padding: .28rem .65rem; border-radius: 999px;
  background: color-mix(in srgb, var(--st) 14%, white);
  color: color-mix(in srgb, var(--st) 75%, #15201b);
  border: 1px solid color-mix(in srgb, var(--st) 28%, white);
}
.status i {
  width: .55rem; height: .55rem; border-radius: 50%; background: var(--st, #8a8f98);
}
.download {
  display: inline-flex; align-items: center; border-radius: 999px;
  background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary);
  text-decoration: none; font-weight: 600; padding: .45rem .9rem; font-size: .8rem;
  box-shadow: var(--md-elevation-1);
  transition: transform .12s ease, background .12s ease;
}
.download:hover { transform: translateY(-1px); }
.download.disabled { background: #c9c3b8; pointer-events: none; box-shadow: none; }
.empty { color: var(--md-sys-color-on-surface-variant); padding: 2rem 0; }
.hidden { display: none !important; }
.foot {
  color: var(--md-sys-color-on-surface-variant); font-size: .82rem;
  padding: 1.4rem 0 2.6rem; display: flex; flex-wrap: wrap; gap: .4rem; align-items: center;
}
.foot-sep { opacity: .5; }