:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c232c;
  --border: #30363d;
  --text: #c9d1d9;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-2: #3fb950;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; border-bottom: 1px solid var(--border);
  background: var(--panel); position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 600; font-size: 17px; }
.muted { color: var(--muted); font-weight: 400; }
.counts { color: var(--muted); font-size: 13px; }
.layout { display: flex; align-items: flex-start; max-width: 1400px; margin: 0 auto; }

/* Sidebar */
.sidebar {
  width: 280px; flex: 0 0 280px; padding: 18px;
  position: sticky; top: 57px; align-self: flex-start;
  border-right: 1px solid var(--border); height: calc(100vh - 57px);
  overflow-y: auto;
}
.filter-block { margin-bottom: 16px; }
.filter-block label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .04em; }
.sidebar input[type=text], .sidebar select {
  width: 100%; padding: 8px 10px; background: var(--panel-2);
  border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 14px;
}
.check { display: flex; align-items: center; gap: 8px; text-transform: none !important; color: var(--text) !important; font-size: 14px !important; }
.seg { display: flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.seg button { flex: 1; padding: 8px; background: var(--panel-2); border: none; color: var(--muted); cursor: pointer; font-size: 13px; }
.seg button.active { background: var(--accent); color: #06101f; font-weight: 600; }
.apply { width: 100%; padding: 10px; background: var(--accent); color: #06101f; border: none; border-radius: 6px; font-weight: 600; cursor: pointer; }
.apply:hover { filter: brightness(1.1); }

/* Content */
.content { flex: 1; padding: 18px 22px; min-width: 0; }
#list { display: flex; flex-direction: column; gap: 14px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px;
}
.card .title-main { font-size: 17px; font-weight: 600; color: var(--text); margin: 0 0 4px; }
.card .title-en { font-size: 13px; color: var(--muted); margin: 0 0 8px; font-style: italic; }
.card .authors { font-size: 13px; color: var(--accent); margin-bottom: 6px; }
.card .meta { display: flex; gap: 12px; align-items: center; font-size: 12px; color: var(--muted); margin-bottom: 8px; flex-wrap: wrap; }
.card .meta .year { background: var(--panel-2); padding: 2px 8px; border-radius: 20px; border: 1px solid var(--border); }
.card .abstract { font-size: 14px; color: var(--text); }
.card .abstract.ru { border-left: 3px solid var(--accent); padding-left: 10px; }
.card .abstract.en { border-left: 3px solid var(--border); padding-left: 10px; color: var(--muted); }
.card summary { cursor: pointer; color: var(--accent); font-size: 13px; margin-top: 6px; }
.card a.btn { color: var(--accent-2); text-decoration: none; }
.card a.btn:hover { text-decoration: underline; }

.more { margin: 20px auto; display: block; padding: 10px 24px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px; color: var(--text); cursor: pointer; }
.loader { text-align: center; color: var(--muted); padding: 20px; }
.hidden { display: none; }

@media (max-width: 768px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; flex: none; position: static; height: auto; border-right: none; border-bottom: 1px solid var(--border); }
}