* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Noto Sans KR", sans-serif;
  background: #f5f7fb;
  color: #222;
}

.page {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.header {
  margin-bottom: 24px;
  padding: 24px;
  border: 1px solid #dde3ef;
  border-radius: 8px;
  background: #ffffff;
}

.header h1 {
  margin: 0 0 8px;
  font-size: 30px;
}

.header p {
  margin: 0;
  color: #5d6678;
  line-height: 1.6;
}

.content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.panel {
  padding: 22px;
  border: 1px solid #dde3ef;
  border-radius: 8px;
  background: #ffffff;
}

.panel h2 {
  margin: 0 0 16px;
  font-size: 20px;
}

.form {
  display: grid;
  gap: 14px;
}

.field {
  display: grid;
  gap: 6px;
}

.field span {
  font-size: 14px;
  font-weight: 700;
}

input,
select,
textarea,
button {
  width: 100%;
  font: inherit;
}

input,
select,
textarea {
  padding: 11px 12px;
  border: 1px solid #cbd4e1;
  border-radius: 6px;
  background: #fff;
}

textarea {
  min-height: 84px;
  resize: vertical;
}

button {
  padding: 12px 14px;
  border: 0;
  border-radius: 6px;
  background: #2563eb;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  background: #94a3b8;
  cursor: wait;
}

.message {
  margin: 0;
  padding: 10px 12px;
  border-radius: 6px;
  background: #ecfdf5;
  color: #047857;
  font-size: 14px;
}

.member-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.member {
  padding: 14px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #fafcff;
}

.member strong {
  display: block;
  margin-bottom: 4px;
}

.member span {
  color: #64748b;
  font-size: 14px;
}

.empty,
.loading {
  color: #64748b;
}

@media (max-width: 720px) {
  .page {
    width: min(100% - 24px, 960px);
    padding: 20px 0;
  }

  .content {
    grid-template-columns: 1fr;
  }

  .header,
  .panel {
    padding: 18px;
  }

  .header h1 {
    font-size: 24px;
  }
}