/* ---------- GLOBAL STYLES ---------- */
body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(to bottom right, #bfdbfe, #a5b4fc);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

/* ---------- CARD CONTAINER ---------- */
.container {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 35px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(147, 197, 253, 0.3);
  padding: 2rem;
}

/* ---------- INPUT AREA ---------- */
textarea {
  border-radius: 30px;
  border: 1px solid #c7d2fe;
  background-color: #eef2ff;
  padding: 1rem 1.25rem;
  font-size: 1.05rem;
  color: #1e293b;
  width: 100%;
  box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.05);
  resize: vertical;
  transition: all 0.25s ease;
}

textarea:focus {
  outline: none;
  border-color: #6366f1;
  background-color: #e0e7ff;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

/* ---------- BUTTON ---------- */
button {
  font-weight: 700;
  border: none;
  border-radius: 30px;
  background: linear-gradient(90deg, #2563eb, #7c3aed, #9333ea);
  color: white;
  padding: 1rem;
  width: 100%;
  font-size: 1.15rem;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
  transition: all 0.3s ease;
}

button:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 18px rgba(99, 102, 241, 0.4);
  background: linear-gradient(90deg, #3b82f6, #8b5cf6, #a855f7);
}

/* ---------- ANSWER BOX ---------- */
#answer-box {
  background: linear-gradient(to bottom right, #eef2ff, #e0f2fe);
  border: 1px solid #c7d2fe;
  border-radius: 30px;
  padding: 1.25rem;
  font-size: 1.05rem;
  color: #1e293b;
  max-height: 350px;
  overflow-y: auto;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.05);
}

/* ---------- HISTORY BOX ---------- */
#history-list {
  max-height: 200px;
  overflow-y: auto;
}

#history-list li {
  background: linear-gradient(to right, #e0e7ff, #f3e8ff);
  padding: 0.9rem 1.2rem;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.25s ease;
  font-weight: 500;
}

#history-list li:hover {
  transform: scale(1.03);
  background: linear-gradient(to right, #c7d2fe, #ddd6fe);
}

/* ---------- SCROLLBAR ---------- */
#answer-box::-webkit-scrollbar,
#history-list::-webkit-scrollbar {
  width: 8px;
}

#answer-box::-webkit-scrollbar-thumb,
#history-list::-webkit-scrollbar-thumb {
  background-color: rgba(99, 102, 241, 0.6);
  border-radius: 6px;
}

/* ---------- TYPING EFFECT ---------- */
.typing {
  border-right: 3px solid #6366f1;
  white-space: nowrap;
  overflow: hidden;
  animation: typing 3s steps(40, end), blink 0.8s infinite;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink {
  50% { border-color: transparent; }
}

/* ---------- SHIMMER LOADING ---------- */
.shimmer {
  background: linear-gradient(
    100deg,
    rgba(255,255,255,0) 20%,
    rgba(255,255,255,0.6) 50%,
    rgba(255,255,255,0) 80%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  height: 80px;
  border-radius: 25px;
  margin-bottom: 10px;
}

@keyframes shimmer {
  100% { background-position: -200% 0; }
}

/* ---------- TITLES ---------- */
h1, h2 {
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 640px) {
  textarea, button {
    font-size: 1rem;
  }
  h1 {
    font-size: 1.9rem;
  }
  h2 {
    font-size: 1.4rem;
  }
}