/* ------------------------------
   Base Body and Layout
--------------------------------*/
body {
  background-color: #0d1117;
  color: #e6edf3;
  font-family: "Segoe UI", Roboto, sans-serif;
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  padding: 3rem 1rem;
  max-width: 800px;
  margin: 0 auto;
  text-align: left;
}

/* ------------------------------
   Header
--------------------------------*/
#site-header {
  width: 100%;
  background-color: #0d1117; /* fallback dark color */
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  height: 4rem; /* adjust if your header content is taller */
}

/* Add padding to main to avoid overlap */
main {
  padding-top: 6rem; /* matches header height */
}

/* ------------------------------
   Footer
--------------------------------*/
#site-footer {
  text-align: center;
  padding: 1.5rem 0;
  margin-top: auto;
  color: #c9d1d9;
}

/* ------------------------------
   Bubble Articles
--------------------------------*/
.bubble {
  position: relative;
  background-color: #161b22;
  border: 1px solid #30363d;
  border-radius: 1.5rem;
  padding: 2rem;
  margin: 2rem 0;
  color: #c9d1d9;
  max-width: 75%;
  line-height: 1.7;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* Left-aligned bubble */
.bubble-left {
  margin-left: 0;
  margin-right: auto;
  border-top-left-radius: 0.5rem;
}

/* Right-aligned bubble */
.bubble-right {
  margin-left: auto;
  margin-right: 0;
  border-top-right-radius: 0.5rem;
}

/* Tail for left bubbles */
.bubble-left::after {
  content: "";
  position: absolute;
  bottom: -12px;
  left: 40px;
  border-width: 12px 12px 0;
  border-style: solid;
  border-color: #161b22 transparent transparent transparent;
  filter: drop-shadow(0 -1px 0 #30363d);
}

/* Tail for right bubbles */
.bubble-right::after {
  content: "";
  position: absolute;
  bottom: -12px;
  right: 40px;
  border-width: 12px 12px 0;
  border-style: solid;
  border-color: #161b22 transparent transparent transparent;
  filter: drop-shadow(0 -1px 0 #30363d);
}

/* Hover lift for depth */
.bubble:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5);
}

/* Responsive adjustments */
@media (max-width: 700px) {
  .bubble {
    max-width: 90%;
    margin: 1.5rem auto;
  }

  .bubble-left,
  .bubble-right {
    margin-left: auto;
    margin-right: auto;
  }

  .bubble-left::after,
  .bubble-right::after {
    left: 30px;
    right: auto;
  }

  main {
    padding-top: 5rem;
  }
}

/* ------------------------------
   Article Headings
--------------------------------*/
article h1, article h2, article h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  line-height: 1.4;
  color: #58a6ff;
}

article h2 {
  color: #79c0ff;
}

article h3 {
  color: #9ecbff;
}

/* Paragraphs */
article p {
  margin: 1rem 0;
  color: #c9d1d9;
}

/* Lists */
article ul {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

article li {
  margin-bottom: 0.5rem;
}