body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  font-family: "Courier New", Courier, monospace;
  background: #000;
  color: #00ffcc;
  /* Multiple radial gradients create starfield dots */
  background-image:
    radial-gradient(circle at 10% 20%, #fff 1px, transparent 0),
    radial-gradient(circle at 30% 40%, #fff 1px, transparent 0),
    radial-gradient(circle at 50% 80%, #fff 1px, transparent 0),
    radial-gradient(circle at 70% 30%, #fff 2px, transparent 0),
    radial-gradient(circle at 90% 60%, #fff 1px, transparent 0);
  background-size: 100px 100px;
  animation: starfield 60s linear infinite;
}

@keyframes starfield {
  from { background-position: 0 0; }
  to   { background-position: -200px 200px; }
}

/* Header styling */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem 0;
  background: rgba(0, 0, 0, 0.7);
  box-shadow: 0 0 10px #00ffcc;
  text-align: center;
  z-index: 100;
}
.header h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 0.3rem;
  color: #00ffcc;
}

/* Interface layout */
.interface {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: calc(100vh - 4rem);
  padding: 6rem 2rem 2rem;
  box-sizing: border-box;
}

/* Avatar styling */
#avatar {
  width: 150px;
  height: 150px;
  border: 2px solid #00ffcc;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 1rem;
}
#avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
#avatar.speaking,
#avatar.speaking img {
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 5px #00ffcc; transform: scale(1); }
  50% { box-shadow: 0 0 25px #00ffccaa; transform: scale(1.05); }
  100% { box-shadow: 0 0 5px #00ffcc; transform: scale(1); }
}

/* Chatbox styling */
#chatbox {
  flex: 1;
  overflow-y: auto;
  border: 1px solid #00ffcc;
  padding: 1rem;
  background-color: #020202;
  box-shadow: 0 0 10px #00ffcc33;
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.6;
}

/* Message bubbles */
.bubble {
  padding: 0.75rem;
  margin: 0.5rem 0;
  border-radius: 0.5rem;
  max-width: 80%;
  animation: typeIn 0.5s ease-out;
  white-space: pre-wrap;
}
.bubble.user {
  align-self: flex-end;
  background-color: #003333;
  color: #00ffff;
}
.bubble.ai {
  align-self: flex-start;
  background-color: #111;
  border: 1px solid #00ffcc;
  color: #00ffcc;
}
@keyframes typeIn {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Input form styling */
form {
  display: flex;
  gap: 1rem;
}
input[type="text"] {
  flex: 1;
  padding: 0.75rem;
  font-size: 1rem;
  background: #001111;
  color: #00ffcc;
  border: 1px solid #00ffcc;
  outline: none;
}
button {
  padding: 0.75rem 1.25rem;
  background-color: #00ffcc;
  border: none;
  color: black;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}
button:hover {
  background-color: #00ffaa;
}

/* Overlay glitch */
#overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,0,0,0.7);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s;
  z-index: 9999;
}
/* === Mobile Responsive Overrides === */
@media (max-width: 600px) {
  /* allow vertical scrolling on small screens */
  body {
    overflow: auto;
  }

  /* tighten up padding */
  .interface {
    padding: 5rem 1rem 1rem !important;
    height: auto !important;
  }

  /* smaller, centered avatar */
  #avatar {
    width: 100px !important;
    height: 100px !important;
    margin-bottom: 0.75rem !important;
  }

  /* adjust chatbox sizing & font */
  #chatbox {
    font-size: 0.9rem;
    max-height: 50vh;
  }

  /* stack form vertically */
  form {
    flex-direction: column;
    gap: 0.5rem;
  }
  input[type="text"],
  button {
    width: 100%;
    box-sizing: border-box;
  }
  button {
    margin: 0; /* remove side margin */
  }
}