:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: #0f1115;
  color: #e8ecf1;
}

.container {
  max-width: 820px;
  margin: 40px auto;
  padding: 0 20px;
}

.header h1 {
  margin: 0 0 4px 0;
  font-size: 28px;
}

.sub {
  margin: 0 0 24px 0;
  color: #9aa4b2;
}

.card {
  background: #161a22;
  border: 1px solid #222938;
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 18px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

.label {
  color: #9aa4b2;
  font-size: 14px;
}

.input {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #2a3346;
  background: #0f131b;
  color: #e8ecf1;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.btn {
  background: #3b82f6;
  color: #fff;
  border: none;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
}

.btn:hover {
  background: #2563eb;
}

.log {
  min-height: 120px;
  background: #0f131b;
  border-radius: 8px;
  border: 1px solid #2a3346;
  padding: 12px;
  white-space: pre-wrap;
}