/* ── RESET & BASE ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: #eef0f5;
  color: #1c1e21;
}

a { text-decoration: none; color: inherit; }

/* ── TOP NAVBAR ───────────────────────────────────────── */
.top-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  background: #fff;
  border-bottom: 1px solid #e4e6eb;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.nav-logo {
  font-size: 20px;
  font-weight: 800;
  color: #e85d04;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: #65676b;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
  position: relative;
  cursor: pointer;
}

.nav-link:hover { background: #f0f2f5; color: #1c1e21; }

.nav-link.active {
  color: #e85d04;
  font-weight: 700;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 16px; right: 16px;
  height: 2px;
  background: #e85d04;
  border-radius: 2px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-bell {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: #f0f2f5;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  color: #65676b;
  transition: background 0.15s;
  position: relative;
}

.nav-bell:hover { background: #e4e6eb; }

.bell-badge {
  position: absolute;
  top: 4px; right: 4px;
  width: 8px; height: 8px;
  background: #e85d04;
  border-radius: 50%;
  border: 2px solid #fff;
  display: none; /* hidden until JS shows it */
}

.nav-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e85d04, #f4a261);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  overflow: hidden;
}

.nav-avatar img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* ── PAGE LAYOUT ──────────────────────────────────────── */
.page-layout {
  display: flex;
  margin-top: 60px;
  min-height: calc(100vh - 60px);
}

/* ── LEFT SIDEBAR ─────────────────────────────────────── */
.left-sidebar {
  width: 220px;
  min-width: 220px;
  position: fixed;
  top: 60px;
  bottom: 0;
  left: 0;
  background: #fff;
  border-right: 1px solid #e4e6eb;
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  overflow-y: auto;
}

.sidebar-label {
  font-size: 11px;
  font-weight: 700;
  color: #8a8d91;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 0 10px;
  margin-bottom: 8px;
  margin-top: 4px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: #444;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.sidebar-item i {
  width: 20px;
  font-size: 16px;
  color: #65676b;
  text-align: center;
}

.sidebar-item:hover {
  background: #f0f2f5;
  color: #1c1e21;
}

.sidebar-item:hover i { color: #e85d04; }

.sidebar-item.active {
  background: #e85d04;
  color: #fff;
  font-weight: 600;
}

.sidebar-item.active i { color: #fff; }

.sidebar-divider {
  height: 1px;
  background: #e4e6eb;
  margin: 12px 0;
}

.sidebar-logout {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: #65676b;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.sidebar-logout:hover {
  background: #fff0ec;
  color: #e85d04;
}

.sidebar-logout i { font-size: 16px; }

/* ── MAIN FEED ────────────────────────────────────────── */
.main-feed {
  flex: 1;
  margin-left: 220px;
  margin-right: 300px;
  padding: 24px 20px;
  max-width: 100%;
}

.feed-inner {
  max-width: 640px;
  margin: 0 auto;
}

/* ── POST CREATOR ─────────────────────────────────────── */
.post-creator {
  background: #fff;
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  margin-bottom: 18px;
}

.creator-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.creator-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e85d04, #f4a261);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; color: #fff;
  flex-shrink: 0;
  overflow: hidden;
}

.creator-avatar img { width: 100%; height: 100%; object-fit: cover; }

.creator-input {
  flex: 1;
  background: #f0f2f5;
  border: none;
  border-radius: 999px;
  padding: 12px 18px;
  font-size: 14px;
  color: #1c1e21;
  cursor: pointer;
  outline: none;
  font-family: inherit;
  resize: none;
  height: 44px;
  transition: background 0.15s;
}

.creator-input:focus {
  background: #e8eaed;
  height: 80px;
}

.creator-input::placeholder { color: #8a8d91; }

.creator-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid #f0f2f5;
}

.creator-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  background: transparent;
  font-size: 14px;
  font-weight: 500;
  color: #65676b;
  cursor: pointer;
  transition: background 0.15s;
}

.creator-btn:hover { background: #f0f2f5; }
.creator-btn i { font-size: 16px; }
.creator-btn .photo-icon { color: #45bd62; }
.creator-btn .feeling-icon { color: #f7b928; }

.creator-post-btn {
  margin-left: auto;
  padding: 9px 22px;
  background: #e85d04;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.creator-post-btn:hover { background: #cf5203; }

/* ── POST CARD ────────────────────────────────────────── */
.post-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  margin-bottom: 18px;
  overflow: hidden;
}

.post-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px 10px;
}

.post-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.post-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea, #764ba2);
  overflow: hidden;
  flex-shrink: 0;
}

.post-avatar img { width: 100%; height: 100%; object-fit: cover; }

.post-avatar.alt { background: linear-gradient(135deg, #f093fb, #f5576c); }

/* Clickable avatar link wrapper */
.post-avatar-link {
  display: inline-flex;
  flex-shrink: 0;
  border-radius: 50%;
  transition: opacity 0.15s;
}

.post-avatar-link:hover { opacity: 0.85; }

/* Initials fallback inside post avatar */
.post-avatar-initials {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  border-radius: 50%;
  user-select: none;
}


.post-name {
  font-size: 15px;
  font-weight: 700;
  color: #1c1e21;
}

/* Clickable author name link */
.post-name-link {
  font-size: 15px;
  font-weight: 700;
  color: #1c1e21;
  text-decoration: none;
  display: block;
}
.post-name-link:hover { text-decoration: underline; color: #e85d04; }

.post-meta {
  font-size: 12.5px;
  color: #8a8d91;
  margin-top: 2px;
}

.post-feeling {
  color: #e85d04;
  font-weight: 500;
}

.post-more {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: #65676b;
  font-size: 16px;
  transition: background 0.15s;
}

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

.post-content {
  padding: 0 18px 12px;
  font-size: 15px;
  line-height: 1.6;
  color: #1c1e21;
}

.post-image {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  display: block;
  cursor: zoom-in;
  transition: filter 0.15s;
}

.post-image:hover { filter: brightness(0.94); }

.post-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  font-size: 13px;
  color: #65676b;
  border-top: 1px solid #f0f2f5;
}

.post-likes-info {
  display: flex;
  align-items: center;
  gap: 6px;
}

.like-avatars {
  display: flex;
}

.like-avatar-sm {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 2px solid #fff;
  margin-left: -6px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  font-size: 9px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-weight: 700;
  overflow: hidden;
}

.like-avatar-sm:first-child { margin-left: 0; }
.like-avatar-sm img { width: 100%; height: 100%; object-fit: cover; }

.post-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
}

.action-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: #65676b;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-family: inherit;
}

.action-btn:hover { background: #f0f2f5; color: #1c1e21; }

.action-btn.liked { color: #e85d04; }
.action-btn.liked i { color: #e85d04; }

.action-btn i { font-size: 16px; }

/* ── RIGHT SIDEBAR ────────────────────────────────────── */
.right-sidebar {
  width: 300px;
  min-width: 300px;
  position: fixed;
  top: 60px; right: 0; bottom: 0;
  padding: 24px 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-card {
  background: #fff;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.sidebar-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.sidebar-card-title {
  font-size: 16px;
  font-weight: 700;
  color: #1c1e21;
}

.view-all {
  font-size: 13px;
  font-weight: 600;
  color: #e85d04;
  cursor: pointer;
}

.view-all:hover { text-decoration: underline; }

/* Announcements */
.announcement-item {
  padding: 12px 14px;
  border-radius: 10px;
  background: #f8f9fa;
  margin-bottom: 10px;
  border-left: 3px solid #e85d04;
}

.announcement-item:last-child { margin-bottom: 0; }

.announcement-item.academic { border-left-color: #667eea; background: #f0f2ff; }

.ann-tag {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #e85d04;
  margin-bottom: 4px;
}

.ann-tag.academic { color: #667eea; }

.ann-title {
  font-size: 13.5px;
  font-weight: 700;
  color: #1c1e21;
  margin-bottom: 4px;
}

.ann-desc {
  font-size: 12.5px;
  color: #65676b;
  line-height: 1.5;
}

/* Friend Suggestions */
.friend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.friend-item:last-of-type { margin-bottom: 0; }

.friend-avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f093fb, #f5576c);
  overflow: hidden;
  flex-shrink: 0;
}

.friend-avatar.blue { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.friend-avatar.green { background: linear-gradient(135deg, #43e97b, #38f9d7); }

.friend-avatar img { width: 100%; height: 100%; object-fit: cover; }

.friend-info { flex: 1; }

.friend-name {
  font-size: 13.5px;
  font-weight: 700;
  color: #1c1e21;
}

.friend-mutual {
  font-size: 12px;
  color: #8a8d91;
}

.friend-add {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: #fff0ec;
  border: none;
  display: flex; align-items: center; justify-content: center;
  color: #e85d04;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.15s;
}

.friend-add:hover { background: #ffddd0; }

.see-more {
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: #e85d04;
  padding-top: 10px;
  border-top: 1px solid #f0f2f5;
  cursor: pointer;
}

.see-more:hover { text-decoration: underline; }

/* Trending */
.trending-card {
  background: #1a2332;
  border-radius: 14px;
  padding: 18px;
}

.trending-card .sidebar-card-title { color: #fff; }

.tags-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: rgba(255,255,255,0.1);
  color: #e0e0e0;
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.tag:hover { background: rgba(232,93,4,0.4); color: #fff; }

/* ── NAV SEARCH BAR (injected by nav.js, used on all pages) ── */
.nav-search-wrap {
  position: relative;
  flex: 1;
  max-width: 340px;
  margin: 0 16px;
}

.nav-search-input {
  width: 100%;
  padding: 8px 14px 8px 36px;
  border: none;
  border-radius: 20px;
  background: #f0f2f5;
  font-size: 14px;
  color: #1c1e21;
  outline: none;
  transition: background 0.15s, box-shadow 0.15s;
}

.nav-search-input:focus {
  background: #fff;
  box-shadow: 0 0 0 2px #e85d04;
}

.nav-search-input::placeholder { color: #bcc0c4; }

.nav-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #65676b;
  font-size: 13px;
  pointer-events: none;
}

.nav-search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 28px rgba(0,0,0,0.14);
  z-index: 9999;
  overflow: hidden;
  animation: navDropIn 0.12s ease;
  max-height: 380px;
  overflow-y: auto;
}

@keyframes navDropIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.nav-dd-section-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #65676b;
  padding: 10px 14px 4px;
}

.nav-dd-user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  text-decoration: none;
  color: #1c1e21;
  transition: background 0.12s;
  cursor: pointer;
}

.nav-dd-user-row:hover { background: #f0f2f5; }

.nav-dd-mini-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.nav-dd-mini-init {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: #e85d04;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.nav-dd-user-name { font-size: 13px; font-weight: 600; }
.nav-dd-user-dept { font-size: 12px; color: #65676b; }

.nav-dd-post-row {
  padding: 9px 14px;
  cursor: pointer;
  transition: background 0.12s;
  border-top: 1px solid #f0f2f5;
}

.nav-dd-post-row:hover { background: #f0f2f5; }

.nav-dd-post-author {
  font-size: 11px;
  color: #65676b;
  margin-bottom: 2px;
}

.nav-dd-post-text {
  font-size: 13px;
  color: #3c4043;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-dd-view-all {
  display: block;
  text-align: center;
  padding: 10px;
  font-size: 13px;
  font-weight: 600;
  color: #e85d04;
  border-top: 1px solid #f0f2f5;
  text-decoration: none;
  transition: background 0.12s;
}

.nav-dd-view-all:hover { background: #fff5f0; }

.nav-dd-empty {
  padding: 16px;
  text-align: center;
  font-size: 13px;
  color: #65676b;
}

/* ── RESPONSIVE ───────────────────────────────────────── */
@media (max-width: 1100px) {
  .right-sidebar { display: none; }
  .main-feed { margin-right: 0; }
}

@media (max-width: 768px) {
  /* Hide desktop sidebars */
  .left-sidebar  { display: none; }
  .right-sidebar { display: none; }

  /* Feed takes full width, add bottom padding for the mobile nav bar */
  .main-feed {
    margin-left: 0;
    margin-right: 0;
    padding: 12px 8px 80px; /* bottom padding = mobile nav height */
  }

  /* Slim top navbar */
  .top-nav { padding: 0 12px; }
  .nav-logo { font-size: 16px; }
  .nav-links { display: none; }           /* hidden — replaced by bottom nav */
  .nav-search-wrap { max-width: 160px; margin: 0 8px; }

  /* Smaller nav icons */
  .nav-bell  { width: 32px; height: 32px; font-size: 14px; }
  .nav-avatar { width: 32px; height: 32px; font-size: 13px; }

  /* Post creator */
  .post-creator { padding: 14px 14px; border-radius: 10px; }
  .creator-input { font-size: 13px; }
  .creator-btn   { padding: 7px 10px; font-size: 13px; }

  /* Post cards */
  .post-card { border-radius: 10px; margin-bottom: 12px; }
  .post-content { font-size: 14px; }
  .post-image { max-height: 280px; }
  .action-btn { font-size: 13px; gap: 5px; }

  /* Full-width images on very small screens */
  .feed-inner { max-width: 100%; }
}

/* ── MOBILE BOTTOM NAVIGATION BAR ────────────────────── */
.mobile-bottom-nav {
  display: none; /* shown only on mobile via media query */
}

@media (max-width: 768px) {
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: 60px;
    background: #fff;
    border-top: 1px solid #e4e6eb;
    z-index: 200;
    align-items: stretch;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.06);
  }

  .mob-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    text-decoration: none;
    color: #65676b;
    font-size: 10px;
    font-weight: 500;
    transition: color 0.15s;
    position: relative;
    cursor: pointer;
  }

  .mob-nav-item i {
    font-size: 20px;
    line-height: 1;
  }

  .mob-nav-item.active {
    color: #e85d04;
  }

  .mob-nav-item.active::before {
    content: '';
    position: absolute;
    top: 0; left: 20%; right: 20%;
    height: 2px;
    background: #e85d04;
    border-radius: 0 0 3px 3px;
  }

  .mob-nav-badge {
    position: absolute;
    top: 8px; right: calc(50% - 18px);
    background: #e85d04;
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 3px;
    border: 2px solid #fff;
    display: none; /* JS shows it */
  }
}