:root {
  --bg: #12141a;
  --panel: #1a1d26;
  --panel-2: #222634;
  --line: #2e3342;
  --text: #e6e8ef;
  --dim: #949bb0;
  --accent: #5b9dff;
  --good: #4ec98a;
  --warn: #f0a848;
  --bad: #f2685f;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 ui-sans-serif, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

button, input, select, textarea { font: inherit; color: inherit; }

button {
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: var(--radius);
  padding: 8px 12px;
  cursor: pointer;
  min-height: 38px;
}
button:hover { border-color: #414861; }
button.primary { background: var(--accent); border-color: var(--accent); color: #08101f; font-weight: 600; }
button.danger  { color: var(--bad); }
button.ghost   { background: transparent; }
button.small   { padding: 4px 9px; min-height: 30px; font-size: 13px; }

input, select, textarea {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px 11px;
  width: 100%;
  min-height: 38px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
textarea { resize: vertical; min-height: 70px; }
label { display: block; font-size: 12px; color: var(--dim); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .04em; }

.hidden { display: none !important; }
.mobile-only { display: none; }

/* --- login --- */
#login {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}
#login form {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  width: min(360px, 100%);
}
#login h1 { margin: 0 0 6px; font-size: 20px; }
#login p { margin: 0 0 18px; color: var(--dim); font-size: 13px; }

/* --- shell --- */
header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(18,20,26,.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 10px 16px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
header .brand { font-weight: 700; letter-spacing: -.01em; white-space: nowrap; }
header .search { flex: 1 1 240px; min-width: 160px; }
header .stat { color: var(--dim); font-size: 13px; white-space: nowrap; }

.banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 12px 16px -4px;
  padding: 10px 14px;
  border: 1px solid var(--warn);
  border-radius: var(--radius);
  background: rgba(240, 168, 72, .10);
  color: var(--warn);
  font-size: 14px;
}

.layout { display: flex; align-items: flex-start; gap: 18px; padding: 16px; max-width: 1400px; margin: 0 auto; }

aside {
  width: 250px;
  flex: 0 0 250px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  position: sticky;
  top: 68px;
  max-height: calc(100dvh - 84px);
  overflow-y: auto;
}
aside h3 { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--dim); margin: 14px 0 6px; }
aside h3:first-child { margin-top: 0; }

.filter {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 5px 8px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 14px;
}
.filter:hover { background: var(--panel-2); }
.filter.active { background: var(--accent); color: #08101f; font-weight: 600; }
.filter .count { color: var(--dim); font-size: 12px; }
.filter.active .count { color: #08101f; }
.filter.child { padding-left: 20px; font-size: 13px; }

main { flex: 1; min-width: 0; }

.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar .grow { flex: 1; }
.toolbar select { width: auto; min-width: 150px; }

/* --- part rows --- */
.part {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 9px;
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.part:hover { border-color: #3c445e; }
.part .body { flex: 1 1 260px; min-width: 0; cursor: pointer; }
.part .name { font-weight: 600; }
.part .meta { color: var(--dim); font-size: 13px; margin-top: 2px; word-break: break-word; }
.part .chips { margin-top: 6px; display: flex; gap: 5px; flex-wrap: wrap; }
.chip {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 9px;
  font-size: 12px;
  color: var(--dim);
}
.chip.spec { color: var(--text); }
.chip.tag { color: var(--accent); border-color: #2c4470; }

.qty { display: flex; align-items: center; gap: 6px; }
.qty .value { min-width: 84px; text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.qty .value .unit { color: var(--dim); font-weight: 400; font-size: 13px; margin-left: 3px; }
.qty.low .value { color: var(--warn); }
.qty.zero .value { color: var(--bad); }

.empty { text-align: center; color: var(--dim); padding: 60px 20px; }

/* --- modal --- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(6,8,13,.72);
  display: grid;
  place-items: center;
  padding: 16px;
  z-index: 50;
  overflow-y: auto;
}
.modal {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  width: min(720px, 100%);
  max-height: calc(100dvh - 32px);
  display: flex;
  flex-direction: column;
  margin: auto;
}
.modal header { position: static; background: none; backdrop-filter: none; justify-content: space-between; }
.modal .content { padding: 16px; overflow-y: auto; }
.modal footer {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  flex-wrap: wrap;
}
.modal footer .grow { flex: 1; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid .full { grid-column: 1 / -1; }

.spec-row { display: flex; gap: 8px; margin-bottom: 7px; align-items: center; }
.spec-row input:first-child { flex: 0 0 38%; }

.history { font-size: 13px; color: var(--dim); }
.history div { padding: 4px 0; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; gap: 10px; }
.pos { color: var(--good); }
.neg { color: var(--bad); }

.node-row { display: flex; gap: 8px; align-items: center; padding: 6px 0; border-bottom: 1px solid var(--line); }
.node-row .path { flex: 1; min-width: 0; word-break: break-word; }
.node-row .count { color: var(--dim); font-size: 12px; }

.toast {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 16px;
  z-index: 100;
  box-shadow: 0 8px 30px rgba(0,0,0,.5);
}
.toast.bad { border-color: var(--bad); color: var(--bad); }

@media (max-width: 820px) {
  .layout { flex-direction: column; padding: 12px; gap: 12px; }
  /* On a phone the filter list is longer than the screen, so it starts closed:
     search and results are what you came for, filters are a tap away. */
  aside { width: 100%; flex: none; position: static; max-height: none; display: none; }
  aside.open { display: block; }
  .mobile-only { display: inline-flex; align-items: center; }
  #filters-btn.active { background: var(--accent); border-color: var(--accent); color: #08101f; }
  .grid { grid-template-columns: 1fr; }
  header { padding: 8px 12px; }
  header .stat { display: none; }
}