:root {
  --max-width: 1680px;
  --padding: 20px;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

body {
  margin: 0;
  font-family: var(--font);
  min-height: 100vh;
  overflow-x: hidden;
}

body[data-theme="dark"] {
  --bg: #0b1020;
  --panel: #121a33;
  --panel2: #0f1730;
  --text: #e8ecff;
  --muted: #aab3d6;
  --border: rgba(255,255,255,.08);
  --accent: #6ea8fe;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

body[data-theme="light"] {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --panel2: #f3f5fb;
  --text: #121526;
  --muted: #4a5477;
  --border: rgba(0,0,0,.10);
  --accent: #2f6fec;
  --shadow: 0 10px 30px rgba(0,0,0,.12);
}

body {
  background: radial-gradient(1000px 700px at 20% 0%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 60%),
              radial-gradient(900px 600px at 90% 20%, rgba(150,110,254,.12), transparent 55%),
              var(--bg);
  color: var(--text);
}

* { box-sizing: border-box; }

.menuBar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: color-mix(in srgb, var(--panel) 60%, transparent);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menuBarInner {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 var(--padding);
  display: flex;
  align-items: center;
  gap: 30px;
}

.logo {
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.5px;
  color: var(--accent);
}

.menuNav {
  display: flex;
  gap: 8px;
  flex: 1;
}

.menuItem {
  padding: 10px 18px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.4s ease;
  background: transparent;
  border: none;
  color: var(--text);
  text-decoration: none;
  position: relative;
}

.menuItem:hover {
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--text);
}

body[data-theme="light"] .menuItem:hover {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
}

.menuItem.active {
  background: color-mix(in srgb, var(--accent) 25%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}

.menuActions {
  display: flex;
  gap: 10px;
  margin-left: auto;
}

.btnIcon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 0.15s ease;
  color: var(--text);
  font-size: 18px;
}

.btnIcon:hover {
  background: rgba(255,255,255,.08);
  border-color: var(--accent);
}

body[data-theme="light"] .btnIcon {
  background: rgba(0,0,0,.04);
}

.container {
  margin-top: 60px;
  display: flex;
  justify-content: center;
  min-height: calc(100vh - 60px);
}

.layoutInner {
  width: 100%;
  max-width: var(--max-width);
  padding: var(--padding);
  padding-bottom: var(--padding);
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--padding);
  align-items: start;
}

.content {
  background: color-mix(in srgb, var(--panel) 60%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  min-height: 600px;
}

.contentTitle {
  font-size: 32px;
  font-weight: 900;
  margin-bottom: 8px;
}

.contentSubtitle {
  color: var(--muted);
  margin-bottom: 32px;
  font-size: 16px;
}

.contentBody {
  line-height: 1.7;
}

.contentBody p {
  margin-bottom: 16px;
}

.sidebar {
  background: linear-gradient(180deg, var(--panel), var(--panel2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: sticky;
  top: 80px;
}

.sidebarSection {
  margin-bottom: 12px;
}

.sectionHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
  transition: all 0.15s ease;
}

body[data-theme="light"] .sectionHeader {
  background: rgba(0,0,0,.04);
}

.sectionHeader:hover {
  background: rgba(255,255,255,.08);
}

body[data-theme="light"] .sectionHeader:hover {
  background: rgba(0,0,0,.06);
}

.sectionToggle {
  transition: transform 0.2s ease;
}

.sectionHeader.collapsed .sectionToggle {
  transform: rotate(-90deg);
}

.sectionContent {
  padding: 8px 4px;
  max-height: 500px;
  overflow: hidden;
  transition: all 0.2s ease;
}

.sectionContent.collapsed {
  max-height: 0;
  padding: 0;
  opacity: 0;
}

.sidebarItem {
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease;
  margin-bottom: 4px;
  font-size: 14px;
}

.sidebarItem:hover {
  background: rgba(255,255,255,.04);
}

body[data-theme="light"] .sidebarItem:hover {
  background: rgba(0,0,0,.04);
}

/* Buttons and Forms */
.btn {
  padding: 12px 20px;
  border-radius: 10px;
  border: 1px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 14px;
  font-family: inherit;
}

.btn:hover {
  background: color-mix(in srgb, var(--accent) 25%, transparent);
}

.formInput, .formTextarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
}

.formTextarea {
  min-height: 150px;
  resize: vertical;
}

.formInput:focus, .formTextarea:focus {
  outline: none;
  border-color: var(--accent);
}

/* User Avatar */
.userAvatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  vertical-align: middle;
  margin-right: 8px;
}

.userAvatarPlaceholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  border-color: var(--accent);
  font-size: 14px;
  width: 28px;
  height: 28px;
  margin-right: 8px;
}

.userLabel {
  display: inline-flex;
  align-items: center;
  margin-right: 10px;
  font-weight: 600;
  font-size: 14px;
}

/* Footer */
footer {
  background: color-mix(in srgb, var(--panel) 60%, transparent);
  border-top: 1px solid var(--border);
}

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

footer a:hover {
  text-decoration: underline;
}

/* ──────────────── POST PAGE ──────────────── */
.postPage {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px 60px;
}
.postBackLink {
  display: inline-block;
  font-weight: 600;
  margin-bottom: 28px;
  color: var(--accent);
  text-decoration: none;
}
.postBackLink:hover { text-decoration: underline; }
.postHeroWrap {
  max-height: 420px;
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 32px;
}
.postHeroWrap img { width: 100%; height: 100%; object-fit: cover; }
.postTitle { font-size: 32px; font-weight: 700; margin-bottom: 14px; }
.postMeta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.metaAvatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}
.avatarPlaceholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}
.postMetaText .metaAuthor { font-weight: 600; color: var(--text); }
.postMetaText .metaDateTime { font-size: 13px; }
.postCategoryBadge {
  margin-left: auto;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}
.postBody { font-size: 16px; line-height: 1.75; }
.postBody p { margin-bottom: 18px; }
.postBody img { max-width: 100%; border-radius: 10px; margin: 14px 0; }
.postLoading, .postError {
  text-align: center;
  padding: 80px 20px;
  color: var(--muted);
}
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }