/* ============================================
   MOBILE-FIRST LAYOUT
   ============================================ */

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  viewport-fit: cover;
}

body {
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

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

/* ============================================
   APP LAYOUT
   ============================================ */

.app-layout {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 100dvh;
  max-width: 100vw;
  overflow-x: hidden;
}

/* ============================================
   SIDEBAR (hidden on mobile, shown on desktop)
   ============================================ */

.sidebar {
  display: none;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main-content {
  min-height: 100dvh;
  max-width: 100vw;
  overflow-x: hidden;
}

/* ============================================
   COMPACT TOP HEADER (mobile)
   ============================================ */

.compact-top-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  min-height: 48px;
  max-width: 100vw;
  overflow: hidden;
}

.compact-top-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.compact-top-header-logo img {
  height: 24px;
  width: auto;
}

.compact-top-header-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-primary);
  white-space: nowrap;
}

.compact-top-header-right {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.compact-top-header-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-primary);
  flex-shrink: 0;
}

.compact-top-header-icon svg {
  width: 20px;
  height: 20px;
}

.compact-compose-btn {
  background: var(--accent);
  color: white !important;
  border-radius: 50%;
}

/* ============================================
   PAGE HEADER (hidden on mobile)
   ============================================ */

.page-header {
  display: none;
}

/* ============================================
   MOBILE BOTTOM NAV
   ============================================ */

.mobile-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  z-index: 1000;
  padding: 6px 8px;
  padding-bottom: max(6px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--border-color);
  max-width: 100vw;
}

.mobile-nav-items {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: 10px;
  color: var(--text-secondary);
  min-width: 40px;
  min-height: 40px;
}

.mobile-nav-link.active,
.mobile-nav-link:hover {
  color: var(--accent);
  background: var(--bg-hover);
}

.mobile-nav-link svg {
  width: 22px;
  height: 22px;
}

.mobile-nav-link .badge {
  position: absolute;
  top: 0;
  right: 0;
}

/* ============================================
   RIGHT SIDEBAR (hidden on mobile)
   ============================================ */

.right-sidebar {
  display: none;
}

/* ============================================
   PAGE CONTENT - fit to screen
   ============================================ */

#main-content {
  max-width: 100vw;
  overflow-x: hidden;
  padding-bottom: 60px; /* space for bottom nav */
}

/* ============================================
   POST CARDS - mobile optimized
   ============================================ */

.post-card {
  display: flex;
  gap: 10px;
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
  max-width: 100vw;
  overflow: hidden;
}

.post-card-avatar {
  flex-shrink: 0;
}

.post-card-body {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.post-card-header {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  min-width: 0;
}

.post-card-name {
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.post-card-handle {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.post-card-dot {
  color: var(--text-secondary);
  font-size: 13px;
}

.post-card-time {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.post-card-content {
  font-size: 15px;
  line-height: 1.5;
  margin: 6px 0;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.post-card-image {
  margin-top: 8px;
  border-radius: 12px;
  overflow: hidden;
  max-width: 100%;
}

.post-card-image img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
}

.post-card-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  max-width: 100%;
}

.post-action {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  border-radius: 8px;
  transition: color 0.2s;
  flex-shrink: 0;
}

.post-action:hover {
  color: var(--accent);
}

.post-action svg {
  width: 18px;
  height: 18px;
}

.post-action-count {
  font-size: 12px;
}

/* ============================================
   COMPOSER - mobile
   ============================================ */

.composer-textarea {
  width: 100%;
  min-height: 80px;
  max-height: 200px;
  padding: 12px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 16px;
  resize: none;
  outline: none;
}

/* ============================================
   FEED - mobile
   ============================================ */

.feed {
  max-width: 100vw;
}

/* ============================================
   PROFILE - mobile
   ============================================ */

.profile-header {
  max-width: 100vw;
  position: relative;
  z-index: 1;
}

.profile-banner {
  width: 100%;
  height: 150px;
  object-fit: cover;
}

.profile-avatar-section {
  padding: 0 16px;
  margin-top: -40px;
}

/* ============================================
   EXPLORE / SEARCH - mobile
   ============================================ */

.search-results {
  max-width: 100vw;
}

/* ============================================
   MODALS - mobile safe
   ============================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
}

.modal-content {
  width: 100%;
  max-height: 90vh;
  background: var(--bg-primary);
  border-radius: 16px 16px 0 0;
  overflow-y: auto;
  padding: 20px;
  padding-bottom: max(20px, env(safe-area-inset-bottom));
}

/* ============================================
   MESSAGES - mobile
   ============================================ */

.messages-page {
  max-width: 100vw;
}

/* ============================================
   STORIES BAR - mobile
   ============================================ */

.stories-bar {
  display: flex;
  gap: 12px;
  padding: 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  max-width: 100vw;
}
.stories-bar::-webkit-scrollbar { display: none; }

/* ============================================
   DROPDOWN - mobile
   ============================================ */

.profile-dropdown {
  position: fixed;
  bottom: 70px;
  left: 12px;
  right: auto;
  background: var(--bg-primary);
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
  border: 1px solid var(--border-color);
  min-width: 200px;
  display: none;
  z-index: 200;
  overflow: hidden;
}
.profile-dropdown.visible { display: block; }

/* ============================================
   DESKTOP (≥768px)
   ============================================ */

@media (min-width: 768px) {
  .app-layout {
    grid-template-columns: 280px 1fr 350px;
    max-width: 1280px;
    margin: 0 auto;
  }

  .sidebar {
    display: flex;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: 12px;
    flex-direction: column;
  }

  .sidebar-logo {
    padding: 12px;
    margin-bottom: 4px;
  }

  .sidebar-logo img {
    height: 32px;
    border-radius: 6px;
  }

  .sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 12px;
    border-radius: 9999px;
    font-size: 20px;
    color: var(--text-primary);
    transition: background 0.2s;
    text-decoration: none;
  }
  .nav-link:hover {
    background: var(--bg-hover);
    text-decoration: none;
  }
  .nav-link.active {
    font-weight: 700;
  }
  .nav-link svg {
    width: 26px;
    height: 26px;
    flex-shrink: 0;
  }

  .nav-label {
    font-size: 20px;
  }

  .sidebar-compose {
    margin-top: 16px;
  }

  .sidebar-compose .btn {
    width: 100%;
    padding: 16px;
    font-size: 17px;
  }

  .sidebar-profile {
    margin-top: auto;
    padding: 12px;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: background 0.2s;
  }
  .sidebar-profile:hover { background: var(--bg-hover); }

  .sidebar-profile-info {
    flex: 1;
    min-width: 0;
  }

  .sidebar-profile-name {
    font-weight: 700;
    font-size: 15px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .sidebar-profile-handle {
    font-size: 15px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .sidebar-profile-more {
    color: var(--text-primary);
    font-size: 18px;
  }

  .compact-top-header {
    display: none;
  }

  .page-header {
    display: block;
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 16px;
  }

  .page-header-title {
    font-size: 20px;
    font-weight: 700;
  }

  .mobile-nav {
    display: none;
  }

  .right-sidebar {
    display: block;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: 12px 24px;
  }

  .right-sidebar-search {
    position: sticky;
    top: 0;
    padding-bottom: 12px;
    background: var(--bg-primary);
    z-index: 10;
  }

  .search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
  }

  .search-input-wrapper svg {
    position: absolute;
    left: 16px;
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
  }

  .search-input {
    width: 100%;
    padding: 12px 16px 12px 48px;
    background: var(--input-bg);
    border: 1px solid transparent;
    border-radius: 9999px;
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.2s;
  }
  .search-input:focus {
    background: var(--input-bg-focus);
    border-color: var(--accent);
  }
  .search-input::placeholder { color: var(--text-secondary); }

  .widget {
    background: var(--bg-secondary);
    border-radius: 16px;
    margin-bottom: 16px;
    overflow: hidden;
  }

  .widget-header {
    padding: 12px 16px;
    font-size: 20px;
    font-weight: 800;
  }

  .widget-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.2s;
  }
  .widget-item:hover { background: var(--bg-hover); }

  .widget-item-title {
    font-size: 15px;
    font-weight: 700;
  }

  .widget-item-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
  }

  .main-content {
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    max-width: none;
  }

  #main-content {
    padding-bottom: 0;
  }

  .post-card {
    padding: 16px;
  }

  .post-card-image img {
    max-height: 500px;
  }

  .modal-overlay {
    align-items: center;
    padding: 16px;
  }

  .modal-content {
    border-radius: 16px;
    max-height: 80vh;
  }

  .profile-dropdown {
    position: absolute;
    bottom: 80px;
    left: 12px;
  }
}

/* ============================================
   LARGE DESKTOP (≥1024px)
   ============================================ */

@media (min-width: 1024px) {
  .sidebar .nav-label { display: block; }
  .sidebar-compose .btn span { display: inline; }
  .sidebar-compose .btn { padding: 16px; width: 100%; }
  .sidebar-profile-info,
  .sidebar-profile-more { display: flex; }
  .sidebar-profile { justify-content: flex-start; padding: 12px; }
}

/* ============================================
   MEDIUM TABLET (768px-1024px)
   ============================================ */

@media (min-width: 768px) and (max-width: 1023px) {
  .app-layout {
    grid-template-columns: 72px 1fr;
  }

  .right-sidebar { display: none; }

  .sidebar .nav-label { display: none; }
  .sidebar-compose .btn span { display: none; }
  .sidebar-compose .btn { padding: 16px; width: auto; }
  .sidebar-profile-info,
  .sidebar-profile-more { display: none; }
  .sidebar-profile { justify-content: center; padding: 12px; }
}

/* ============================================
   SHORTVS / CAMERA - hide nav
   ============================================ */

body:has(.shortvs-feed-mobile) .mobile-nav,
body:has(.camera-view) .mobile-nav {
  display: none !important;
}

body:has(.shortvs-feed-mobile) .compact-top-header {
  display: none !important;
}