/* ===== Tab Bar (Bottom of Sidebar) ===== */
.tab-bar {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: var(--bg-header);
  border-top: 1px solid var(--border);
  padding: 4px 0;
  padding-bottom: 4px;
  flex-shrink: 0;
}

.tab-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 12px;
  border-radius: 8px;
  transition:
    color 0.15s,
    background 0.15s;
  font-family: var(--font);
  font-size: 11px;
  min-width: 52px;
  position: relative;
}

.tab-btn svg {
  transition: color 0.15s;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  color: var(--accent);
}

.tab-btn.active span {
  font-weight: 600;
}

/* Active indicator line */
.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

/* ===== Category Bar (Pill Buttons) ===== */
.category-bar {
  display: flex;
  gap: 8px;
  padding: 6px 16px 8px;
  overflow-x: auto;
  flex-shrink: 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.category-bar::-webkit-scrollbar {
  display: none;
}

.category-btn {
  background: var(--bg-search);
  color: var(--text-secondary);
  border: none;
  padding: 5px 14px;
  border-radius: 16px;
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background 0.15s,
    color 0.15s;
  flex-shrink: 0;
}

.category-btn:hover {
  background: var(--bg-active);
  color: var(--text-primary);
}

.category-btn.active {
  background: var(--accent);
  color: #fff;
}

/* ===== Tab Panels ===== */
.tab-content {
  flex: 1 1 auto;
  min-height: 0;
  overflow: scroll;
}

.tab-panel {
  display: none;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

.tab-panel.active {
  display: flex;
  flex-direction: column;
}

.tab-panel::-webkit-scrollbar {
  width: 6px;
}

.tab-panel::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 3px;
}

/* Tab empty state */
.tab-empty-state {
  padding: 40px 20px;
  text-align: center;
}

.tab-empty-state p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
}

/* ===== Chat Settings Panel ===== */
.chat-settings-panel {
  position: absolute;
  top: 60px;
  right: 0;
  width: 280px;
  max-height: calc(100% - 60px);
  background: var(--bg-modal);
  border-left: 1px solid var(--border);
  z-index: 50;
  overflow-y: auto;
  animation: slideInRight 0.2s ease;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.chat-settings-panel.hidden {
  display: none;
}

.chat-settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.chat-settings-header h4 {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.chat-settings-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chat-settings-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chat-settings-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.chat-settings-toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-primary);
  cursor: pointer;
}

.chat-settings-toggle-label input[type='checkbox'] {
  accent-color: var(--accent);
}

.chat-settings-select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 16px;
  font-family: var(--font);
  outline: none;
}

.chat-settings-select:focus {
  border-color: var(--accent);
}

/* Color swatches */
.color-swatches {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    border-color 0.15s,
    transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-secondary);
}

.color-swatch:hover {
  transform: scale(1.1);
  border-color: var(--text-secondary);
}

.color-swatch.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 168, 132, 0.3);
}

.color-swatch.swatch-default {
  background: var(--bg-input);
  border: 2px dashed var(--border-light);
}

/* Custom chat background override */
#chat-area.custom-bg .messages {
  background-color: var(--chat-bg-custom, var(--bg-chat));
}

/* Custom bubble color override */
#chat-area.custom-bubble .message.sent .message-bubble {
  background: var(--bubble-color-custom, var(--bg-bubble-user));
}

#chat-area.custom-bubble .message.sent .message-bubble::before {
  border-left-color: var(--bubble-color-custom, var(--bg-bubble-user));
}

/* ===== Status Feature ===== */
.status-list {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.status-user-section {
  border-bottom: 1px solid var(--border);
}

.status-add-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  cursor: pointer;
  transition: background 0.15s;
}

.status-add-btn:hover {
  background: var(--bg-hover);
}

.status-add-icon {
  width: 49px;
  height: 49px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.status-add-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.status-add-title {
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 400;
}

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

.status-section-label {
  padding: 10px 16px 6px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-author-entry {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
  cursor: pointer;
  transition: background 0.15s;
}

.status-author-entry:hover {
  background: var(--bg-hover);
}

/* Status ring around avatar */
.status-avatar-wrap {
  position: relative;
  width: 49px;
  height: 49px;
  flex-shrink: 0;
}

.status-avatar-wrap .avatar-img,
.status-avatar-wrap .avatar-placeholder {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 43px !important;
  height: 43px !important;
}

.status-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 49px;
  height: 49px;
  border-radius: 50%;
  border: 2.5px solid var(--accent);
}

.status-author-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.status-author-name {
  font-size: 16px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-author-time {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ===== Status Viewer Overlay ===== */
.status-viewer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.92);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.status-viewer {
  width: 100%;
  max-width: 420px;
  height: 100%;
  max-height: 720px;
  display: flex;
  flex-direction: column;
  background: var(--bg-chat);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

/* Progress bar */
.status-progress-bar {
  display: flex;
  gap: 3px;
  padding: 8px 8px 0;
}

.status-progress-seg {
  flex: 1;
  height: 3px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  transition: background 0.3s;
}

.status-progress-seg.active {
  background: var(--accent);
}

/* Viewer header */
.status-viewer-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
}

.status-viewer-header .avatar-img {
  border-radius: 50%;
}

.status-viewer-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.status-viewer-name {
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
}

.status-viewer-time {
  font-size: 12px;
  color: var(--text-secondary);
}

.status-viewer-close {
  color: var(--text-secondary);
}

/* Viewer content */
.status-viewer-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  cursor: pointer;
  user-select: none;
  position: relative;
}

.status-viewer-text {
  font-size: 20px;
  color: var(--text-primary);
  text-align: center;
  line-height: 1.5;
  max-width: 320px;
}

/* Viewer actions */
.status-viewer-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  padding: 12px;
  border-top: 1px solid var(--border);
}

.status-action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 20px;
  transition:
    background 0.15s,
    color 0.15s;
  font-size: 14px;
  font-family: var(--font);
}

.status-action-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.status-action-btn.liked {
  color: #e53935;
}

.status-action-btn.liked svg path {
  fill: #e53935;
}

/* Status compose */
.status-compose-input {
  resize: vertical;
  min-height: 60px;
  max-height: 150px;
}

/* ===== Learning Feature ===== */
.learn-create-btn {
  border-bottom: 1px solid var(--border) !important;
}

.learn-flashcard-section {
  padding: 16px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

.learn-flashcard-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
}

.learn-flashcard-header h4 {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}

.learn-flashcard-hint {
  font-size: 11px;
  color: var(--text-secondary);
}

.learn-lang-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.learn-lang-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 8px;
  background: var(--bg-search);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition:
    background 0.15s,
    border-color 0.15s;
  font-family: var(--font);
  font-size: 12px;
  color: var(--text-primary);
}

.learn-lang-card:hover {
  background: var(--bg-active);
  border-color: var(--accent);
}

.learn-lang-flag {
  font-size: 24px;
}

/* Tags */
.learn-tag-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.learn-tag-btn {
  background: var(--bg-search);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 14px;
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s,
    border-color 0.15s;
}

.learn-tag-btn:hover {
  background: var(--bg-active);
  color: var(--text-primary);
}

.learn-tag-btn.active {
  background: rgba(0, 168, 132, 0.15);
  color: var(--accent);
  border-color: var(--accent);
}

/* ===== Flashcard Modal ===== */
.flashcard-modal {
  max-width: 380px;
}

.flashcard-body {
  align-items: center;
}

.flashcard-counter {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 4px;
}

.flashcard {
  width: 100%;
  min-height: 160px;
  perspective: 600px;
  cursor: pointer;
  margin-bottom: 8px;
}

.flashcard-front,
.flashcard-back {
  width: 100%;
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  border-radius: 12px;
  font-size: 20px;
  text-align: center;
  line-height: 1.4;
  backface-visibility: hidden;
  transition: transform 0.4s ease;
}

.flashcard-front {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.flashcard-back {
  background: rgba(0, 168, 132, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 168, 132, 0.3);
  position: absolute;
  top: 0;
  left: 0;
  transform: rotateY(180deg);
}

.flashcard.flipped .flashcard-front {
  transform: rotateY(180deg);
}

.flashcard.flipped .flashcard-back {
  transform: rotateY(0deg);
}

.flashcard-actions {
  display: flex;
  gap: 8px;
  width: 100%;
  justify-content: center;
}

.flashcard-actions .btn-secondary,
.flashcard-actions .btn-primary {
  flex: 1;
  text-align: center;
}

/* ===== Mobile Adjustments ===== */
@media (max-width: 768px) {
  .tab-btn {
    padding: 6px 8px;
    min-width: 44px;
    font-size: 10px;
  }

  .tab-btn svg {
    width: 20px;
    height: 20px;
  }

  .category-btn {
    padding: 4px 12px;
    font-size: 12px;
  }

  .chat-settings-panel {
    width: 100%;
    left: 0;
    right: 0;
    border-left: none;
    border-radius: 0;
  }

  .status-viewer {
    max-width: 100%;
    max-height: 100%;
    border-radius: 0;
  }

  .learn-lang-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .tab-btn span {
    font-size: 9px;
  }
}