.admin-body {
  margin: 0;
  background: #eef2f6;
  color: #0f2d45;
  font-family: "Pretendard", "Noto Sans KR", sans-serif;
}

.admin-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

.admin-sidebar {
  background: #0f2d45;
  color: #d7e2ec;
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.admin-brand {
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.35;
}

.admin-brand span {
  font-weight: 400;
  font-size: 0.8rem;
  opacity: 0.75;
}

.admin-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.admin-nav a {
  display: block;
  padding: 0.55rem 0.65rem;
  border-radius: 6px;
  color: inherit;
  text-decoration: none;
  font-size: 0.9rem;
}

.admin-nav a:hover,
.admin-nav a.active {
  background: rgba(255, 255, 255, 0.1);
}

.admin-sidebar-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.8rem;
}

.admin-sidebar-foot a,
.admin-sidebar-foot button {
  color: inherit;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  padding: 0;
  font: inherit;
}

.admin-main {
  padding: 1.25rem 1.5rem 2rem;
}

.admin-topbar h1 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
}

.admin-content {
  background: #fff;
  border: 1px solid #d5dee8;
  border-radius: 8px;
  padding: 1.25rem;
}

.admin-form label {
  display: block;
  margin-bottom: 0.85rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.admin-form input,
.admin-form textarea {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid #c5d3de;
  border-radius: 6px;
  font: inherit;
  font-weight: 400;
}

.admin-form fieldset {
  border: 1px solid #e1e8ef;
  border-radius: 8px;
  margin: 0 0 1rem;
  padding: 1rem;
}

.admin-form legend {
  padding: 0 0.35rem;
  font-weight: 700;
}

.admin-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.btn {
  display: inline-block;
  border: 0;
  border-radius: 6px;
  padding: 0.6rem 1rem;
  font: inherit;
  cursor: pointer;
}

.btn-primary {
  background: #1a4f7a;
  color: #fff;
}

.btn-block {
  width: 100%;
}

.form-error {
  color: #b42318;
  font-size: 0.875rem;
}

.form-success {
  color: #027a48;
  font-size: 0.875rem;
}

.admin-hint {
  color: #5a6b7a;
  font-size: 0.8rem;
  font-weight: 400;
}

.admin-login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(160deg, #e8f1f8, #f7fafc 50%, #dfeaf3);
  margin: 0;
  font-family: "Pretendard", "Noto Sans KR", sans-serif;
}

.admin-login-card {
  width: min(360px, 92vw);
  background: #fff;
  border: 1px solid #d5dee8;
  border-radius: 10px;
  padding: 1.5rem;
}

.admin-login-card h1 {
  margin: 0 0 0.25rem;
  font-size: 1.35rem;
  color: #1a4f7a;
}

.admin-login-hint {
  margin-top: 1rem;
  font-size: 0.8rem;
}

.admin-cards {
  display: grid;
  gap: 0.75rem;
}

.admin-card {
  border: 1px solid #e1e8ef;
  border-radius: 8px;
  padding: 1rem;
}

.admin-card a {
  color: #1a4f7a;
  font-weight: 600;
}

@media (max-width: 800px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }
  .admin-sidebar {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }
  .admin-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
  }
  .admin-sidebar-foot {
    margin-top: 0;
    flex-direction: row;
    gap: 1rem;
  }
  .admin-form-row {
    grid-template-columns: 1fr;
  }
}