/* 전체 기본 설정 */
body {
  margin: 0;
  padding: 40px 20px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: #f5f7fa;
  color: #111827;
}

/* 공통 컨테이너 */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

/* 로그인 페이지용 좁은 레이아웃 */
body:has(.poster) .container {
  max-width: 520px;
  text-align: center;
}

/* 포스터 이미지 */
.poster {
  width: 100%;
  display: block;
  margin: 0 auto 20px;
  border-radius: 12px;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15);
}

/* 부제 */
.subtitle {
  color: #6b7280;
  margin: 0 0 20px 0;
}

/* 카드 UI */
.card {
  background: #ffffff;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* 제목 */
h1, h2, h3 {
  margin-top: 0;
  margin-bottom: 14px;
  line-height: 1.25;
}

/* 입력창 */
input,
textarea,
select {
  width: 100%;
  padding: 12px;
  margin: 6px 0 12px 0;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  font-size: 14px;
  box-sizing: border-box;
  background: #ffffff;
}

/* textarea */
textarea {
  resize: vertical;
}

/* 버튼 */
button {
  padding: 10px 16px;
  border: none;
  background: #2b6cb0;
  color: white;
  border-radius: 8px;
  cursor: pointer;
  margin-right: 6px;
  font-size: 14px;
}

button:hover {
  background: #1a4f85;
}

/* 로그인 버튼 행 */
.btn-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-row button {
  margin-right: 0;
  min-width: 110px;
}

/* 저자 블록 */
.author-block {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 12px;
}

/* 테이블 */
table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
}

td,
th {
  padding: 10px 8px;
  border-bottom: 1px solid #e5e7eb;
  font-size: 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f9fafb;
}

/* 리스트 */
ul {
  padding-left: 20px;
}

/* 링크 */
a {
  color: #1d4ed8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Registration badge */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
}

.badge-gray {
  background: #e5e7eb;
  color: #374151;
}

.badge-yellow {
  background: #fef3c7;
  color: #92400e;
}

.badge-blue {
  background: #dbeafe;
  color: #1e40af;
}

.badge-green {
  background: #dcfce7;
  color: #166534;
}

.badge-red {
  background: #fee2e2;
  color: #991b1b;
}

.badge-orange {
  background: #ffedd5;
  color: #9a3412;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.stat-card {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 14px 16px;
}

.stat-label {
  font-size: 13px;
  color: #6b7280;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: #111827;
}

@media (max-width: 600px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* 모바일 대응 */
@media (max-width: 600px) {
  body {
    padding: 24px 14px;
  }

  .container {
    padding: 10px;
  }

  input,
  textarea,
  select {
    font-size: 16px;
  }

  .btn-row {
    flex-direction: column;
  }

  .btn-row button,
  button {
    width: 100%;
    margin-right: 0;
    margin-bottom: 8px;
  }
}