:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --ok: #34d399;
  --warn: #fbbf24;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg); color: var(--text); min-height: 100dvh;
}
header {
  position: sticky; top: 0; z-index: 5;
  background: #0b1220cc; backdrop-filter: blur(8px);
  padding: 0.75rem 1rem; border-bottom: 1px solid #334155;
  display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap;
}
header h1 { font-size: 1.1rem; margin: 0; flex: 1; }
nav button, .btn {
  background: var(--card); color: var(--text); border: 1px solid #475569;
  border-radius: 10px; padding: 0.55rem 0.85rem; font-size: 0.95rem;
}
nav button.active, .btn.primary { background: #0369a1; border-color: #0284c7; }
main { padding: 1rem; max-width: 720px; margin: 0 auto; }
.card {
  background: var(--card); border: 1px solid #334155; border-radius: 14px;
  padding: 1rem; margin-bottom: 0.75rem;
}
.card h3 { margin: 0 0 0.35rem; font-size: 1rem; }
.meta { color: var(--muted); font-size: 0.85rem; }
label { display: block; margin: 0.5rem 0 0.2rem; color: var(--muted); font-size: 0.85rem; }
input, select, textarea {
  width: 100%; padding: 0.65rem; border-radius: 10px; border: 1px solid #475569;
  background: #0f172a; color: var(--text); font-size: 1rem;
}
.row { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 120px; }
.line { display: grid; gap: 0.4rem; padding: 0.5rem 0; border-top: 1px solid #334155; }
.badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 999px; font-size: 0.75rem; background: #334155; }
.badge.SENT, .badge.OPEN { background: #075985; }
.badge.LINKED { background: #065f46; }
.badge.CONVERTED { background: #4c1d95; }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.75rem; }
.hidden { display: none !important; }
.empty { color: var(--muted); text-align: center; padding: 2rem 1rem; }