/* CSS Variables for Theming */
:root {
  --background-color: #ffffff;
  --border-color: #cecece;
  --box-shadow-color: rgba(0, 0, 0, 0.1);
  --font-color: #333333;
  --avatar-bg-color: #b2bec6;
  --no-avatar-body-bg-color: #ffffff;
}

/* Dark Mode Overrides */
.dark {
  --background-color: #1b2335;
  --border-color: #444444;
  --box-shadow-color: rgba(0, 0, 0, 0.5);
  --font-color: #ffffff;
  --avatar-bg-color: #2f3b52;
  --no-avatar-body-bg-color: #3c4a64;
}

.topic_preview_container {
  font-size: 0.875rem; /* Increased for better readability */
  font-style: normal;
  text-decoration: none;
  background: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  box-shadow: 1px 1px 3px var(--box-shadow-color);
  color: var(--font-color);
  position: absolute;
  z-index: 10;
  display: none;
  min-width: 40px;
  margin-left: -40px;
  padding: 10px;
}

/* Tooltip Arrow for Normal Position */
.topic_preview_container:before {
  /* Upper Triangle */
  background: var(--background-color);
  border: 0;
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  position: absolute;
  display: block;
  width: 10px;
  height: 10px;
  margin-top: -16px;
  margin-left: 15px;
  content: "";
  transform: rotate(-45deg);
}

/* Tooltip Arrow for Inverted Vertical Position */
.topic_preview_container.invert:after {
  /* Lower Triangle */
  background: var(--background-color);
  border: 0;
  border-top: 1px solid var(--border-color);
  border-left: 1px solid var(--border-color);
  position: absolute;
  top: 100%;
  display: block;
  width: 10px;
  height: 10px;
  margin-top: -4px;
  margin-left: 15px;
  content: "";
  transform: rotate(-135deg); /* Arrow pointing down */
}

.topic_preview_container.invert:before {
  /* Hide upper triangle */
  display: none;
  content: "";
}

/* Adjust arrow position when flipped horizontally */
.topic_preview_container.edge-flip-horizontal:before {
  margin-left: auto;
  margin-right: 15px;
  left: auto;
  right: 0;
}

.topic_preview_container.edge-flip-horizontal.invert:after {
  margin-left: auto;
  margin-right: 15px;
  left: auto;
  right: 0;
}

.topic_preview_container.edge-flip-horizontal.invert:before {
  /* Hide upper triangle */
  display: none;
  content: "";
}

.topic_preview_container hr {
  margin: 5px 0;
  border: none;
  border-top: 1px solid var(--border-color);
}

/* Avatars and Text */
.topic_preview_avatar {
  position: relative;
  float: left;
  width: 60px;
  height: 60px;
  margin: 0 12px 2px 0;
}

.topic_preview_avatar img {
  border: 1px solid var(--border-color);
  width: auto;
  max-width: 60px;
  height: auto;
  max-height: 60px;
}

.topic_preview_avatar.rtl {
  /* RTL languages */
  float: right;
  margin: 0 0 2px 12px;
}

.topic_preview_first,
.topic_preview_last {
  word-wrap: break-word;
  overflow: hidden;
  max-height: 200px;
}

.topic_preview_break {
  font-size: 0;
  display: block;
  clear: both;
  width: 100%;
  height: 0;
  margin: 0;
  padding: 5px 0;
}

/* Pure CSS No-Avatar */
.topic_preview_no_avatar {
  background: var(--avatar-bg-color);
  box-shadow: 0 0 0 1px var(--avatar-bg-color);
  position: relative;
  overflow: hidden;
  width: 60px;
  height: 60px;
}

/* No-Avatar Body */
.topic_preview_no_avatar:before {
  background: var(--no-avatar-body-bg-color);
  border-radius: 100%;
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 80%;
  height: 80%;
  transform: translateX(-50%) translateY(35%);
  content: "";
}

/* No-Avatar Head */
.topic_preview_no_avatar:after {
  background: var(--no-avatar-body-bg-color);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--avatar-bg-color);
  position: absolute;
  top: 10%;
  left: 50%;
  width: 50%;
  height: 50%;
  transform: translateX(-50%);
  content: "";
}

/* Responsive Design */
@media only screen and (max-width: 550px) {
  .topic_preview_container {
    max-width: 300px;
  }
}

@media only screen and (max-width: 360px) {
  .topic_preview_container {
    max-width: 220px;
  }
}