/* kollaboration.css — Collaborative learning rooms */

.kollaboration-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
}

.kollaboration-container .panel {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

/* Session list */
.session-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid #eee;
  transition: background 0.2s;
}

.session-card:last-child {
  border-bottom: none;
}

.session-card:hover {
  background: #f9f9f9;
}

.session-card .session-info {
  flex: 1;
}

.session-card .session-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 4px 0;
}

.session-card .session-meta {
  font-size: 0.85rem;
  color: #7f8c8d;
}

.session-card .session-meta span {
  margin-right: 12px;
}

.session-card .session-actions {
  flex-shrink: 0;
}

/* Participants panel */
.participants-panel {
  margin-bottom: 0;
}

.participants-panel .panel-body {
  padding: 8px;
  max-height: 360px;
  overflow-y: auto;
}

.participant-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 0.9rem;
}

.participant-item .fa-user {
  color: #3498db;
  width: 16px;
  text-align: center;
}

.participant-item .participant-name {
  flex: 1;
}

/* Chat area */
.chat-messages {
  height: 320px;
  overflow-y: auto;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 12px;
  margin: 12px 0;
  background: #fafafa;
}

.chat-input-area {
  margin-bottom: 12px;
}

.message-bubble {
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  max-width: 85%;
  word-wrap: break-word;
}

.message-bubble.message-own {
  background: #d4edda;
  margin-left: auto;
  border-bottom-right-radius: 2px;
}

.message-bubble.message-other {
  background: #fff;
  border: 1px solid #e0e0e0;
  margin-right: auto;
  border-bottom-left-radius: 2px;
}

.message-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
  font-size: 0.8rem;
}

.message-author {
  font-weight: 600;
  color: #2c3e50;
}

.message-time {
  color: #95a5a6;
  font-size: 0.75rem;
}

.message-text {
  font-size: 0.95rem;
  line-height: 1.4;
  white-space: pre-wrap;
}

/* Exercises tab */
.exercises-toolbar {
  margin: 12px 0;
  display: flex;
  gap: 8px;
}

.exercise-card {
  padding: 12px 16px;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color 0.2s;
}

.exercise-card:hover {
  border-color: #bbb;
}

.exercise-card.exercise-completed {
  background: #f0fff0;
  border-color: #b2dfb2;
  opacity: 0.8;
}

.exercise-card .exercise-info {
  flex: 1;
}

.exercise-card .exercise-name {
  font-weight: 600;
  margin: 0 0 2px 0;
}

.exercise-card .exercise-meta {
  font-size: 0.8rem;
  color: #7f8c8d;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  .session-card {
    border-color: #444;
  }
  .session-card:hover {
    background: #333;
  }
  .session-card .session-meta {
    color: #bbb;
  }
  .chat-messages {
    background: #2c2c2c;
    border-color: #444;
  }
  .message-bubble.message-own {
    background: #1a4d2e;
    color: #e0e0e0;
  }
  .message-bubble.message-other {
    background: #333;
    border-color: #555;
    color: #e0e0e0;
  }
  .message-author {
    color: #ddd;
  }
  .message-time {
    color: #888;
  }
  .exercise-card {
    border-color: #444;
    background: #2c2c2c;
  }
  .exercise-card:hover {
    border-color: #666;
  }
  .exercise-card.exercise-completed {
    background: #1a3d1a;
    border-color: #2d6a2d;
  }
  .participant-item {
    color: #e0e0e0;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .session-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .session-card .session-actions {
    width: 100%;
  }
  .session-card .session-actions .btn {
    width: 100%;
  }
  .message-bubble {
    max-width: 100%;
  }
  .session-list-actions,
  .session-detail-actions {
    display: flex;
    gap: 4px;
  }
}