* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #0f172a;
  background: #f8fafc;
}

main.popup {
  width: 320px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

main.popup header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

main.popup h1 {
  font-size: 1.1rem;
  margin: 0;
}

main.popup button,
main.popup input {
  font: inherit;
}

#open-options {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
}

form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

input {
  padding: 6px 8px;
  border: 1px solid #cbd5f5;
  border-radius: 6px;
  background: white;
}

button[type="submit"],
button.secondary {
  padding: 8px 10px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  background: #2563eb;
  color: white;
  font-weight: 600;
}

button[disabled] {
  opacity: 0.6;
  cursor: progress;
}

button.secondary {
  background: #e2e8f0;
  color: #0f172a;
  border: 1px solid #cbd5f5;
}

.status {
  min-height: 1.2em;
  font-size: 0.85rem;
}

.status.error {
  color: #dc2626;
}

.status.success {
  color: #0f766e;
}

.counter {
  font-weight: normal;
  color: #64748b;
}

.over-limit {
  color: #b91c1c;
}

footer {
  font-size: 0.85rem;
}

main.options {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 16px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

main.options h1 {
  margin-bottom: 8px;
}

main.options section {
  background: white;
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

main.options form {
  max-width: 400px;
}

main.options .tips {
  margin: 0;
  padding-left: 20px;
  color: #475569;
  font-size: 0.95rem;
}

.help {
  margin: 0;
  color: #475569;
  font-size: 0.9rem;
}

a {
  color: #2563eb;
}