* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem;
  color: #222;
  background: #fafafa;
}
header h1 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}
section {
  margin-bottom: 1.5rem;
  padding: 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #fff;
}
h2 {
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 0.8rem;
}
fieldset {
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 0.5rem 1rem;
  margin: 0 0 1rem;
}
fieldset legend { padding: 0 0.4rem; font-size: 0.9rem; color: #555; }
fieldset label {
  display: inline-block;
  margin: 0.2rem 0.8rem 0.2rem 0;
  font-size: 0.95rem;
}
form > label {
  display: block;
  margin: 0.6rem 0;
  font-size: 0.95rem;
}
form > label.inline { display: inline-block; }
input[type=number],
input[type=time],
input[type=text] {
  padding: 0.35rem 0.5rem;
  margin-left: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.95rem;
}
button {
  padding: 0.5rem 1rem;
  background: #2c7be5;
  color: #fff;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.95rem;
}
button:hover { background: #1a68d6; }
.toast {
  margin-top: 0.6rem;
  min-height: 1.4rem;
  color: #2c7be5;
  font-size: 0.9rem;
}
.toast.error, .error { color: #c00; }
#history-list { list-style: none; padding: 0; margin: 0; }
#history-list li {
  border-bottom: 1px solid #eee;
  padding: 0.7rem 0;
  font-size: 0.92rem;
}
#history-list li small { color: #555; display: block; margin-top: 0.25rem; }
#history-list li:last-child { border-bottom: 0; }