:root {
  color-scheme: light;
  --bs-primary: #176b87;
  --bs-primary-rgb: 23, 107, 135;
  --app-bg: #f3f6fa;
  --app-surface: #ffffff;
  --app-soft: #f7f9fc;
  --app-line: #dce3ec;
  --app-text: #17202a;
  --app-muted: #667085;
  --app-accent: #8a5a20;
  --app-shadow: 0 14px 32px rgba(21, 34, 50, 0.08);
}

html {
  min-width: 320px;
}

.app-body {
  min-height: 100vh;
  color: var(--app-text);
  background:
    radial-gradient(circle at top left, rgba(var(--bs-primary-rgb), 0.12), transparent 28rem),
    linear-gradient(180deg, #fbfcfe 0%, var(--app-bg) 18rem);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Segoe UI", sans-serif;
}

.app-navbar {
  box-shadow: 0 8px 20px rgba(21, 34, 50, 0.05);
  backdrop-filter: blur(12px);
}

.navbar-brand {
  letter-spacing: 0.01em;
}

.app-nav-link {
  color: #344054;
  font-weight: 700;
  border-radius: 999px;
}

.app-nav-link:hover,
.app-nav-link:focus {
  color: var(--bs-primary);
  background: rgba(var(--bs-primary-rgb), 0.08);
  text-decoration: none;
}

.container-xl {
  max-width: 1120px;
}

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

a:hover {
  text-decoration: underline;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.5rem;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.15;
}

h2 {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  font-weight: 800;
}

.eyebrow {
  margin-bottom: 0.35rem;
  color: var(--app-accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.board-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  color: #fff;
  background: linear-gradient(135deg, #176b87 0%, #23546a 55%, #1f2937 100%);
  border-radius: 0.85rem;
  box-shadow: var(--app-shadow);
}

.board-head .eyebrow,
.board-head p {
  color: rgba(255, 255, 255, 0.82);
}

.board-head h1 {
  color: #fff;
}

.panel,
.app-card {
  background: var(--app-surface);
  border: 1px solid var(--app-line);
  border-radius: 0.85rem;
  box-shadow: var(--app-shadow);
}

.panel {
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.panel.narrow,
.app-card-narrow {
  width: min(520px, 100%);
  margin-inline: auto;
}

.app-card .card-body {
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.stack {
  display: grid;
  gap: 1rem;
}

label,
fieldset {
  display: grid;
  gap: 0.45rem;
  color: var(--app-text);
  font-weight: 750;
}

fieldset {
  padding: 1rem;
  border: 1px solid var(--app-line);
  border-radius: 0.75rem;
}

legend {
  width: auto;
  padding: 0 0.35rem;
  color: var(--app-muted);
  font-size: 0.95rem;
}

input:not([type="hidden"]):not([type="checkbox"]),
select,
textarea {
  display: block;
  width: 100%;
  min-height: 2.75rem;
  padding: 0.6rem 0.8rem;
  color: var(--app-text);
  background: #fff;
  border: 1px solid #b8c4d2;
  border-radius: 0.55rem;
  font: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(var(--bs-primary-rgb), 0.65);
  box-shadow: 0 0 0 0.22rem rgba(var(--bs-primary-rgb), 0.16);
  outline: 0;
}

textarea {
  resize: vertical;
}

button:not(.btn),
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.65rem;
  padding: 0.58rem 0.95rem;
  color: #fff;
  background: var(--bs-primary);
  border: 1px solid var(--bs-primary);
  border-radius: 0.55rem;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}

button:not(.btn):hover,
.button:hover {
  color: #fff;
  background: #10576d;
  border-color: #10576d;
  text-decoration: none;
}

.button.secondary,
button.secondary {
  color: #344054;
  background: #fff;
  border-color: #b8c4d2;
}

.button.secondary:hover,
button.secondary:hover {
  color: var(--bs-primary);
  background: #f8fbfd;
  border-color: rgba(var(--bs-primary-rgb), 0.4);
}

.button.ghost {
  color: var(--bs-primary);
  background: transparent;
  border-color: transparent;
}

.button.ghost:hover {
  color: #10576d;
  background: rgba(var(--bs-primary-rgb), 0.08);
}

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

.link-button {
  min-height: auto;
  padding: 0;
  color: var(--bs-primary);
  background: transparent;
  border: 0;
  font-weight: 800;
}

.danger-text {
  color: #b42318;
}

.actions,
.inline-form,
.compact-upload {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(150px, 210px) auto auto;
  gap: 0.75rem;
  align-items: center;
  margin: 1.25rem 0;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--app-line);
  border-radius: 0.85rem;
  box-shadow: 0 10px 24px rgba(21, 34, 50, 0.05);
}

.post-list {
  display: grid;
  gap: 0.85rem;
}

.post-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  padding: 1.15rem;
  background: var(--app-surface);
  border: 1px solid var(--app-line);
  border-radius: 0.85rem;
  box-shadow: 0 10px 26px rgba(21, 34, 50, 0.06);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.post-card:hover {
  transform: translateY(-1px);
  box-shadow: var(--app-shadow);
}

.post-card h2 {
  margin-bottom: 0.35rem;
}

.post-card h2 a {
  color: #164e63;
}

.post-card p {
  margin: 0;
  color: var(--app-muted);
}

.meta,
.post-meta,
.meta-line,
.helper,
.comment span,
.file-list span {
  color: var(--app-muted);
  font-size: 0.9rem;
}

.meta {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  min-width: 260px;
}

.meta span,
.file-list span {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.5rem;
  background: var(--app-soft);
  border: 1px solid var(--app-line);
  border-radius: 999px;
}

.detail-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--app-line);
}

.content-body {
  margin: 1.5rem 0;
  white-space: normal;
}

.attachments,
.comments {
  margin-top: 1.25rem;
}

.file-list,
.comment-list {
  display: grid;
  gap: 0.75rem;
  padding: 0;
  list-style: none;
}

.file-list li,
.comment {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.85rem;
  padding: 0.85rem;
  background: var(--app-soft);
  border: 1px solid var(--app-line);
  border-radius: 0.75rem;
}

.comment {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
}

.comment-main p {
  margin: 0.35rem 0 0;
}

.comment-edit {
  min-width: min(300px, 100%);
}

.comment-edit summary {
  color: var(--bs-primary);
  font-weight: 800;
  cursor: pointer;
}

.compact-upload {
  margin-top: 0.85rem;
}

.compact-upload input {
  width: min(420px, 100%);
}

.empty {
  padding: 2rem;
  color: var(--app-muted);
  background: rgba(255, 255, 255, 0.7);
  border: 1px dashed #aab4c2;
  border-radius: 0.85rem;
  text-align: center;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 650;
}

.check-row input {
  width: auto;
  min-height: auto;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  padding: 0.8rem;
  border-bottom: 1px solid var(--app-line);
  text-align: left;
}

th {
  color: var(--app-muted);
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .board-head,
  .detail-head,
  .post-card,
  .comment {
    grid-template-columns: 1fr;
  }

  .board-head,
  .detail-head {
    display: grid;
  }

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

  .meta {
    justify-content: flex-start;
    min-width: 0;
  }
}