:root {
  --bg: #0b0d10;
  --elev: #11151a;
  --card: #161b22;
  --muted: #9aa4b2;
  --text: #e6edf3;
  --accent: #3b82f6;
  --border: #232c36;
  --danger: #ef4444;
  --radius: 16px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 500 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
}

/* === Login screen === */
.center-screen {
  display: flex; align-items: center; justify-content: center; height: 100vh;
}
.login-box {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; width: 340px; text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}
.login-box h2 { margin: 0 0 18px; }
.login-box input {
  display: block; width: 100%; margin-bottom: 10px; padding: 10px;
  border-radius: 10px; border: 1px solid var(--border); background: #0f141a; color: var(--text);
}
.login-box button {
  width: 100%; background: var(--accent); border: none; padding: 10px;
  border-radius: 10px; color: #fff; cursor: pointer; font-weight: 600; transition: .2s ease;
}
.login-box button:hover { background: #2563eb; }
.error { color: var(--danger); margin-top: 8px; }

/* === Top bar === */
.nav-bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 18px; border-bottom: 1px solid var(--border); background: var(--elev);
  position: sticky; top: 0; z-index: 10;
}
.tabs { display: flex; gap: 10px; }
.tab {
  background: var(--card); border: 1px solid var(--border); color: var(--text);
  padding: 8px 18px; border-radius: 12px; cursor: pointer; transition: .2s ease; font-weight: 600;
}
.tab:hover { border-color: var(--accent); color: var(--accent); }
.tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.actions { display: flex; align-items: center; gap: 10px; }
.actions input[type="text"], .actions input[type="date"] {
  background: #0f141a; border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 8px 12px;
}
.actions button {
  background: var(--card); border: 1px solid var(--border); color: var(--text);
  padding: 8px 14px; border-radius: 10px; cursor: pointer; transition: .2s ease;
}
.actions button:hover { background: var(--accent); color: white; }

/* === Content === */
.tab-content { display: none; padding: 16px 18px; max-width: 1100px; margin: 0 auto; }
.tab-content.active { display: block; }

.loader { display: flex; gap: 12px; align-items: center; padding: 28px; }
.empty { padding: 28px; text-align: center; color: var(--muted); }

/* === Tree === */
.group {
  border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: var(--elev); margin-bottom: 12px;
}
.group-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; cursor: pointer; transition: background .2s ease;
}
.group-header:hover { background: #0f141a; }
.children { display: none; border-top: 1px solid var(--border); background: #0c1116; }
.children.open { display: block; }
.child {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; border-top: 1px dashed #1e2936;
}
.child .meta { display: flex; gap: 10px; align-items: center; }

.toggle { transform: rotate(0deg); transition: transform .2s ease; margin-right: 8px; display: inline-block; }
.toggle.rot { transform: rotate(90deg); }

.kv { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #0b1016; border: 1px solid var(--border); border-radius: 8px; padding: 4px 6px; font-size: 12px; }

.link { color: #93c5fd; text-decoration: none; font-weight: 500; }
.link:hover { text-decoration: underline; }

/* === Responsive === */
@media (max-width: 860px) {
  .nav-bar { flex-direction: column; align-items: stretch; gap: 8px; }
  .actions { flex-wrap: wrap; justify-content: space-between; }
  .actions input[type="date"], .actions input[type="text"] { width: calc(50% - 5px); }
  .actions button { width: 100%; }
  .child { flex-direction: column; align-items: flex-start; gap: 8px; }
}
@media (max-width: 480px) {
  .actions input[type="date"], .actions input[type="text"] { width: 100%; }
}
/* Подсветка совпадений в поиске */
mark.hl {
  background: #f59e0b;
  color: #111;
  padding: 0 2px;
  border-radius: 3px;
}