:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Malgun Gothic", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

main.container {
  padding-top: 28px;
  padding-bottom: 48px;
}

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

h1 {
  font-size: 22px;
  margin: 0;
}

/* buttons */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  background: #f0f2f5;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

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

.btn-danger:hover {
  filter: brightness(0.94);
}

/* list */
.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.post-item + .post-item {
  border-top: 1px solid var(--border);
}

.post-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  text-decoration: none;
  color: var(--text);
}

.post-link:hover {
  background: #f0f2f5;
}

.post-title {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.post-date {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--muted);
}

.empty {
  padding: 40px;
  text-align: center;
  color: var(--muted);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 12px;
}

/* detail */
.post {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.post-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.post-meta {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

.video-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-bottom: 20px;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.post-content {
  word-break: break-word;
  min-height: 640px;
}

.post-content img {
  max-width: 100%;
  height: auto;
}

.post-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.post-actions form {
  margin: 0;
  margin-left: auto;
}

/* form */
.post-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.field {
  margin-bottom: 20px;
}

.field label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 14px;
}

.field .optional {
  color: var(--muted);
  font-weight: 400;
}

.field input[type="text"],
.field input[type="url"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
}

.field input:focus {
  outline: none;
  border-color: var(--primary);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* pagination */
.pager {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 24px;
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
}

.page-btn:hover {
  background: #f0f2f5;
}

.page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}

.site-footer {
  padding: 24px 0;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}