* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, sans-serif;
  background: #050505;
  color: white;
  min-height: 100vh;
}

header {
  height: 75px;
  padding: 0 6%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #202020;
}

.logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
}

.logo span {
  color: #8b5cf6;
}

.research-btn {
  background: #111;
  border: 1px solid #333;
  color: white;
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
}

main {
  min-height: calc(100vh - 130px);
  display: flex;
  justify-content: center;
  padding: 90px 20px;
}

.hero {
  width: 100%;
  max-width: 850px;
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid #292929;
  background: #101010;
  border-radius: 30px;
  color: #aaa;
  font-size: 13px;
  margin-bottom: 28px;
}

h1 {
  font-size: clamp(45px, 8vw, 82px);
  line-height: 1;
  letter-spacing: -4px;
}

h1 span {
  color: #8b5cf6;
}

.hero > p {
  color: #888;
  font-size: 17px;
  margin: 25px 0 40px;
}

.chat-box {
  background: #101010;
  border: 1px solid #292929;
  border-radius: 18px;
  padding: 18px;
  text-align: left;
  box-shadow: 0 20px 70px rgba(0,0,0,.4);
}

textarea {
  width: 100%;
  height: 90px;
  resize: none;
  background: transparent;
  border: none;
  outline: none;
  color: white;
  font-size: 17px;
  font-family: inherit;
}

textarea::placeholder {
  color: #666;
}

.bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #666;
  font-size: 13px;
}

.bottom button {
  width: 43px;
  height: 43px;
  border: none;
  border-radius: 12px;
  background: #8b5cf6;
  color: white;
  font-size: 20px;
  cursor: pointer;
}

.bottom button:hover {
  transform: scale(1.05);
}

#answer {
  display: none;
  margin-top: 25px;
  padding: 25px;
  background: #0d0d0d;
  border: 1px solid #292929;
  border-radius: 15px;
  text-align: left;
  line-height: 1.6;
  color: #ddd;
}

footer {
  text-align: center;
  color: #555;
  padding: 20px;
  border-top: 1px solid #202020;
}