:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22d3ee;
  --accent-2: #a78bfa;
  --border: #1f2937;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(34,211,238,0.08), transparent 35%),
              radial-gradient(circle at 80% 0%, rgba(167,139,250,0.1), transparent 30%),
              var(--bg);
  color: var(--text);
}
.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
h1 { margin: 0; font-size: 28px; letter-spacing: 0.02em; }
h2 { margin: 0 0 12px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.25);
}
input, textarea, button {
  font: inherit;
}
input, textarea {
  background: #0b1222;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  width: 100%;
}
textarea { min-height: 80px; resize: vertical; }
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 8px;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 8px;
}
button {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  border: none;
  color: #0b1222;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.08s ease, box-shadow 0.2s;
}
button:hover { transform: translateY(-1px); box-shadow: 0 10px 25px rgba(34,211,238,0.25); }
button:active { transform: translateY(0); }
.small {
  padding: 6px 10px;
  font-size: 13px;
  border-radius: 7px;
}
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.muted { color: var(--muted); font-size: 14px; }
#expenses {
  display: grid;
  gap: 10px;
}
.expense {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  background: #0b1222;
}
.expense h3 { margin: 0 0 6px; }
.expense .meta { color: var(--muted); font-size: 14px; }
#log {
  background: #0b1222;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  margin: 0;
  min-height: 100px;
  white-space: pre-wrap;
}
#api-url { color: var(--muted); font-size: 14px; }
@media (max-width: 640px) {
  header { flex-direction: column; align-items: flex-start; gap: 4px; }
}