:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1f232c;
  --border: #2a2f3a;
  --text: #e8eaed;
  --muted: #9aa3b0;
  --accent: #4f8cff;
  --ok: #2fbf71;
  --ok-bg: #12331f;
  --warn: #f2b134;
  --warn-bg: #3a2e0e;
  --err: #ff5d5d;
  --err-bg: #3a1414;
  --info: #6b7280;
  --shadow: 0 6px 24px rgba(0,0,0,.35);
  --radius: 12px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6f9;
    --panel: #ffffff;
    --panel-2: #f0f3f8;
    --border: #dfe4ec;
    --text: #1a1f2b;
    --muted: #5b6678;
    --ok-bg: #e6f7ee;
    --warn-bg: #fdf3da;
    --err-bg: #fde7e7;
    --shadow: 0 6px 24px rgba(20,30,60,.08);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* ---- Topbar ---- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 12px 18px;
  background: var(--panel); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 26px; }
.topbar h1 { font-size: 18px; margin: 0; }
.sub { margin: 0; color: var(--muted); font-size: 12px; }
.conn { display: flex; align-items: center; gap: 8px; }
.conn-text { font-size: 12px; color: var(--muted); min-width: 84px; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-off { background: var(--info); }
.dot-ok { background: var(--ok); box-shadow: 0 0 0 3px rgba(47,191,113,.2); }
.dot-err { background: var(--err); box-shadow: 0 0 0 3px rgba(255,93,93,.2); }
.icon-btn {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 6px 9px; cursor: pointer; font-size: 15px;
}
.icon-btn:hover { border-color: var(--accent); }

/* ---- Settings ---- */
.settings {
  background: var(--panel); border-bottom: 1px solid var(--border); padding: 14px 18px;
}
.settings-grid {
  display: grid; gap: 14px;
  grid-template-columns: minmax(220px, 1.4fr) repeat(2, minmax(120px, .6fr)) minmax(180px, 1fr);
}
.settings label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.settings input[type="url"], .settings input[type="number"] {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 8px 10px; font-size: 14px;
}
.settings small { color: var(--muted); font-size: 11px; }
.settings .check { flex-direction: row; align-items: center; gap: 8px; font-size: 13px; color: var(--text); }

/* ---- Layout ---- */
.layout {
  display: grid; grid-template-columns: minmax(300px, 420px) 1fr;
  gap: 16px; padding: 16px; align-items: start;
  height: calc(100vh - 64px);
}
.panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.scan-panel {
  padding: 16px; display: flex; flex-direction: column; gap: 14px;
  height: 100%;
}
.preview-panel {
  padding: 16px; display: flex; flex-direction: column; gap: 12px;
  height: 100%; overflow: hidden;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field.grow { flex: 1; min-height: 0; }
.field label { font-size: 13px; font-weight: 600; }
.muted { color: var(--muted); font-weight: 400; }
.hint { font-size: 12px; color: var(--muted); min-height: 14px; }

#destino {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 10px 12px; font-size: 16px;
}
#destino:focus, #scan:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

#scan {
  flex: 1; min-height: 160px; resize: none;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 12px; font: 15px/1.5 ui-monospace, "Cascadia Code", Consolas, monospace;
  letter-spacing: .3px;
}

/* ---- Actions ---- */
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.btn {
  border-radius: 9px; padding: 11px 14px; font-size: 14px; font-weight: 600;
  cursor: pointer; border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; flex: 1; min-width: 130px; }
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); }
.btn-ghost { background: transparent; }

/* ---- Preview head + leyenda ---- */
.preview-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.icon-btn.small { font-size: 12px; padding: 5px 9px; white-space: nowrap; }

.leyenda {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px;
}
.leyenda-col h4 { margin: 0 0 8px; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
.leyenda-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 7px; }
.leyenda-col li { font-size: 12px; line-height: 1.4; color: var(--text); }
.leyenda-col li .tag { margin-right: 5px; vertical-align: middle; }

/* ---- Summary ---- */
.summary { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  border: 1px solid var(--border); background: var(--panel-2);
}
.chip b { font-size: 13px; }
.chip.ok { color: var(--ok); }
.chip.warn { color: var(--warn); }
.chip.err { color: var(--err); }

/* ---- List ---- */
.list { overflow-y: auto; display: flex; flex-direction: column; gap: 8px; padding-right: 4px; }
.empty { color: var(--muted); text-align: center; padding: 40px 10px; font-size: 14px; }

.row {
  display: grid; grid-template-columns: 8px 1fr auto; gap: 12px;
  align-items: center; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--panel-2);
}
.row .bar { width: 5px; height: 100%; min-height: 38px; border-radius: 4px; }
.row.ok    { border-color: rgba(47,191,113,.4); }
.row.ok    .bar { background: var(--ok); }
.row.alerta{ border-color: rgba(242,177,52,.45); background: color-mix(in srgb, var(--warn-bg) 55%, var(--panel-2)); }
.row.alerta .bar { background: var(--warn); }
.row.error { border-color: rgba(255,93,93,.5); background: color-mix(in srgb, var(--err-bg) 55%, var(--panel-2)); }
.row.error .bar { background: var(--err); }
.row.nuevo { animation: flash .6s ease; }
@keyframes flash { from { transform: translateX(-4px); opacity: .4; } to { transform: none; opacity: 1; } }

.row-main { min-width: 0; }
.row-lpn { font: 14px ui-monospace, Consolas, monospace; font-weight: 700; letter-spacing: .3px; }
.row-desc { font-size: 13px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row-meta { font-size: 12px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 12px; margin-top: 3px; }
.row-meta .strong { color: var(--text); font-weight: 600; }
.row-right { text-align: right; display: flex; flex-direction: column; align-items: flex-end; gap: 4px; }
.price { font-size: 16px; font-weight: 700; }
.price.low { color: var(--warn); }
.tags { display: flex; flex-wrap: wrap; gap: 4px; justify-content: flex-end; }
.tag {
  font-size: 11px; font-weight: 600; padding: 2px 7px; border-radius: 6px;
  background: var(--panel); border: 1px solid var(--border);
}
.tag.t-err { color: var(--err); border-color: rgba(255,93,93,.5); }
.tag.t-warn{ color: var(--warn); border-color: rgba(242,177,52,.5); }
.tag.t-info{ color: var(--muted); }

/* ---- Toast ---- */
.toast {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow);
  padding: 12px 18px; border-radius: 10px; font-size: 14px; max-width: 90vw; z-index: 50;
}
.toast.ok { border-color: var(--ok); }
.toast.err { border-color: var(--err); }

.hidden { display: none !important; }

/* ---- Responsive ---- */
@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .scan-panel, .preview-panel { height: auto; }
  .list { max-height: 50vh; }
  .settings-grid { grid-template-columns: 1fr 1fr; }
  .leyenda { grid-template-columns: 1fr; }
}