body {
  font-family: Inter, sans-serif;
  background: #0f172a;
  color: white;
  padding: 40px;
}

.container {
  max-width: 900px;
  margin: auto;
}

h1 {
  margin-bottom: 30px;
}

.input-group {
  margin-bottom: 25px;
}

input {
  width: 100%;
  padding: 14px;
  border-radius: 8px;
  border: none;
  font-size: 15px;
  margin-bottom: 12px;
  text-align: left;
  direction: ltr;
}

button {
  padding: 12px 22px;
  background: #6366f1;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
}

button:hover {
  background: #4f46e5;
}

button.btn-reset {
  background: transparent;
  border: 1px solid #64748b;
  color: #94a3b8;
  margin-left: 8px;
}

button.btn-reset:hover {
  background: #334155;
  border-color: #94a3b8;
  color: white;
}

.chat {
  margin-top: 35px;
}

.message {
  position: relative;
  padding: 18px;
  margin-bottom: 18px;
  border-radius: 10px;
  line-height: 1.7;
  font-size: 15px;
}

.user {
  background: #1e293b;
  text-align: right;
}

.ai {
  background: #334155;
}

.loading {
  margin-top: 10px;
  font-size: 14px;
  opacity: 0.8;
}

.hidden {
  display: none;
}

.message h1,
.message h2,
.message h3 {
  margin-top: 12px;
}

.message strong {
  font-weight: 600;
}

.message ul {
  padding-left: 20px;
}

.message li {
  margin-bottom: 6px;
}

.voiceIcon {
  position: absolute;
  top: 8px;
  right: 10px;
  cursor: pointer;
  font-size: 14px;
  opacity: 0.7;
}

.voiceIcon:hover {
  opacity: 1;
}

.spinner {
  border: 4px solid #334155;
  border-top: 4px solid #6366f1;
  border-radius: 50%;
  width: 18px;
  height: 18px;
  animation: spin 1s linear infinite;
  display: inline-block;
  margin-right: 8px;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.back-nav {
  margin-bottom: 1rem;
}

.back-nav a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
}

.back-nav a:hover {
  color: #e2e8f0;
}

.hero {
  margin-bottom: 16px;
}

.appTitle {
  margin: 0 0 10px 0;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.appSubtitle {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: #94a3b8;
  max-width: 780px;
}