:root {
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
}

body {
  margin: 0;
  line-height: 1.6;
  background: #fff;
  color: #222;
}

.page-header {
  border-bottom: 1px solid rgba(42, 42, 42, 0.08);
}

.header-inner {
  max-width: 960px;
  margin-left: 0;
  margin-right: auto;
  padding: 24px 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand a {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.site-logo {
  height: 75px;
  width: auto;
  flex-shrink: 0;
  display: block;
}

.brand-text {
  font-weight: 700;
  font-size: 2.0rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.content {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
}

.caption {
  margin-bottom: 1em;
}

form {
  margin-top: 24px;
}

fieldset {
  margin-bottom: 16px;
  padding: 12px;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 6px;
}

legend {
  padding: 0 6px;
  font-weight: 600;
}

label {
  margin-right: 12px;
}

input[type="text"] {
  padding: 4px 6px;
  font-size: 1rem;
}

button {
  margin-top: 12px;
  padding: 8px 16px;
  font-size: 1rem;
  cursor: pointer;
}

.hidden {
  display: none;
}

@media (max-width: 600px) {
  .header-inner {
    padding: 12px 16px;
  }

  .site-logo {
    height: 32px;
  }

  .brand-text {
    font-size: 1.1rem;
  }

  .content {
    padding: 16px;
  }

  .page-title {
    font-size: 1.3rem;
  }
}