:root {
  --bg: #f5f6f8;
  --panel: #fff;
  --ink: #1f2933;
  --muted: #687482;
  --line: #d7dce2;
  --head: #eef1f5;
  --primary: #285f8f;
  --primary-dark: #1f4b72;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 56px;
}

.brand {
  color: #111827;
  font-weight: 800;
  font-size: 18px;
}

nav {
  display: flex;
  gap: 14px;
  align-items: center;
}

.user {
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
}

main {
  padding: 28px 0 60px;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 25px;
}

h2 {
  font-size: 18px;
}

.muted {
  color: var(--muted);
}

.page-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.login-panel {
  max-width: 420px;
  margin: 64px auto;
}

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

label {
  display: grid;
  gap: 6px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 11px;
  font: inherit;
  background: #fff;
}

textarea {
  resize: vertical;
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 13px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.primary:hover {
  background: var(--primary-dark);
  text-decoration: none;
}

.danger {
  border-color: #b42318;
  background: #b42318;
  color: #fff;
}

.danger:hover {
  background: #8f1c13;
}

.link-button {
  border: 0;
  padding: 0;
  min-height: auto;
  background: transparent;
  color: var(--primary);
}

.actions {
  display: flex;
  gap: 8px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 11px;
  background: #fff;
  color: var(--ink);
}

.tab span {
  color: var(--muted);
  font-size: 12px;
}

.tab.active {
  border-color: var(--primary);
  background: #e9f1f8;
  color: #173d5d;
  font-weight: 800;
}

.bbs-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-top: 2px solid #2d3748;
}

.bbs-table th,
.bbs-table td {
  border-bottom: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}

.bbs-table th {
  background: var(--head);
  font-weight: 800;
}

.col-id {
  width: 72px;
}

.col-category {
  width: 98px;
}

.col-author {
  width: 220px;
}

.col-date {
  width: 150px;
}

.badge {
  display: inline-block;
  margin-left: 8px;
  border: 1px solid #a8bdce;
  border-radius: 999px;
  padding: 1px 8px;
  color: #315a78;
  font-size: 12px;
}

.category-badge {
  display: inline-block;
  border: 1px solid #c8d1dc;
  border-radius: 6px;
  padding: 2px 7px;
  background: #f8fafc;
  color: #40566b;
  font-size: 12px;
  white-space: nowrap;
}

.empty {
  padding: 30px;
  text-align: center;
  color: var(--muted);
}

.post .meta,
.memo .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  margin-bottom: 16px;
}

.post-body {
  min-height: 180px;
  white-space: normal;
}

.attachments {
  margin-top: 24px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 18px;
}

.memo {
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}

.memo:first-child {
  padding-top: 0;
}

.category-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.category-row {
  display: grid;
  grid-template-columns: 1fr 140px 80px;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--ink);
}

.category-row span,
.category-row small {
  color: var(--muted);
}

@media (max-width: 760px) {
  .topbar-inner,
  .page-title {
    align-items: flex-start;
    flex-direction: column;
  }

  .user {
    margin-left: 0;
  }

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

  .col-author,
  .col-date,
  .col-category {
    display: none;
  }

  .category-row {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}