:root {
  --bg: #f7fafc;
  --card: #ffffff;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial; background: var(--bg); color: #111827; }
.container { max-width: 1100px; margin: 20px auto; padding: 0 16px; }
.page-header { margin-bottom: 12px; }
.page-header h1 { margin: 0 0 4px; font-size: 1.8rem; }
.subtitle { color: var(--muted); margin: 0; }

.inputs { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin: 16px 0; }
.inputs h2 { margin-top: 0; font-size: 1.3rem; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; }
.input { width: 100%; padding: 10px; border: 2px solid var(--border); border-radius: 8px; }
.actions-row { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.btn { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 9px 12px; font-weight: 600; cursor: pointer; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn:active { transform: translateY(1px); }

.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0; }
.tab { display: inline-block; padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--card); text-decoration: none; color: inherit; }
.tab.active { background: #eff6ff; border-color: #bfdbfe; color: #1d4ed8; }

.panel { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.panel-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.panel h2 { margin: 0; font-size: 1.3rem; }
.panel-actions { display: flex; gap: 8px; }
.output { background: #0b1020; color: #e5e7eb; border-radius: 8px; padding: 12px; min-height: 150px; overflow: auto; }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.card { border: 1px solid var(--border); border-radius: 8px; padding: 10px; background: #fff; }
.list { list-style: disc; padding-left: 20px; }
.page-footer { color: var(--muted); text-align: center; margin: 10px 0 20px; }

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr 1fr; }
  .cards { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr; }
}