:root {
  --bg-1: #020916;
  --bg-2: #0a1c3a;
  --card: rgba(8, 17, 38, 0.88);
  --border: rgba(44, 176, 255, 0.5);
  --primary: #75d2ff;
  --secondary: #e6f7ff;
  --accent: #ff6b6b;
}

.ai-main-container {
  max-width: 980px;
  margin: 100px auto 50px;
  padding: 1.25rem;
  background: radial-gradient(circle at 10% 20%, rgba(6, 35, 70, 0.95), rgba(0, 0, 0, 0.88));
  border-radius: 14px;
  border: 1px solid rgba(53, 176, 255, 0.35);
  box-shadow: 0 0 40px rgba(34, 141, 225, 0.24);
}

.ai-intro h2 {
  color: var(--primary);
  margin: 0;
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  text-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
}

.ai-intro p {
  color: var(--secondary);
  margin-top: 0.5rem;
  line-height: 1.5;
}

.chat-window {
  margin-top: 1.6rem;
  padding: 0.85rem;
  background: var(--card);
  border-radius: 12px;
  border: 1px solid var(--border);
  min-height: 420px;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding-right: 6px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.message {
  max-width: 80%;
  padding: 0.64rem 0.72rem;
  border-radius: 12px;
  line-height: 1.45;
  transition: transform 0.14s ease;
}

.message.user {
  align-self: flex-end;
  background: rgba(94, 221, 255, 0.18);
  color: #b3f3ff;
  border: 1px solid rgba(69, 195, 255, 0.55);
}

.message.ai {
  align-self: flex-start;
  background: rgba(74, 82, 134, 0.65);
  color: #f0f7ff;
  border: 1px solid rgba(64, 129, 241, 0.45);
}

.message:hover { transform: scale(1.01); }

.chat-form {
  display: flex;
  gap: 0.45rem;
  border-top: 1px solid rgba(90, 185, 255, 0.25);
  padding-top: 0.45rem;
}

.chat-form input {
  flex: 1;
  padding: 0.7rem 0.85rem;
  border-radius: 8px;
  border: 1px solid rgba(112, 190, 255, 0.55);
  background: rgba(6, 11, 20, 0.8);
  color: #def7ff;
}

.chat-form input:focus {
  outline: 2px solid rgba(98, 213, 255, 0.85);
}

.chat-form button {
  padding: 0.7rem 1rem;
  border: none;
  border-radius: 8px;
  background: linear-gradient(120deg, #38d9ff, #0c78c2);
  color: #010b20;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.chat-form button:hover { transform: translateY(-1px); }

.api-status {
  font-size: 0.9rem;
  color: #cfe9ff;
  border-radius: 8px;
  padding: 0.42rem 0.6rem;
  border: 1px solid rgba(95, 196, 255, 0.2);
  background: rgba(1, 8, 20, 0.7);
}

.api-setup {
  margin-top: 1.7rem;
  background: rgba(2, 11, 33, 0.8);
  border: 1px dotted rgba(72, 177, 255, 0.33);
  border-radius: 10px;
  padding: 0.85rem;
}

.api-setup h3 {
  margin: 0;
  margin-bottom: 0.6rem;
  font-size: 1rem;
  color: #b7ddff;
}

.api-setup input {
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.62rem;
  border-radius: 8px;
  border: 1px solid rgba(97, 193, 255, 0.5);
  background: rgba(6, 16, 34, 0.9);
  color: #d3f0ff;
}

.api-setup p {
  font-size: 0.8rem;
  color: #a3c7ef;
  margin-top: 0.4rem;
}

@media (max-width: 830px) {
  .ai-main-container { margin: 90px 0 25px; }
  .chat-form { flex-direction: column; }
  .chat-form button { width: 100%; }
}

/* Mobile Optimizations & Responsive Design */
@media (max-width: 1024px) {
  header, main, footer {
    padding: 1rem 0.75rem;
  }

  main {
    max-width: 100%;
    overflow-x: hidden;
  }

  .ai-main-container {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin: 80px auto 30px;
    padding: 1rem;
  }

  .chat-window {
    min-height: 380px;
  }
}

@media (max-width: 768px) {
  body {
    padding-top: 80px;
  }

  header, main, footer {
    padding: 0.75rem 0.5rem;
  }

  main {
    max-width: 100%;
    overflow-x: hidden;
  }

  .ai-main-container {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin: 70px auto 20px;
    padding: 0.75rem;
    border-radius: 12px;
  }

  .ai-intro h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
  }

  .ai-intro p {
    font-size: 0.9rem;
    line-height: 1.4;
  }

  .chat-window {
    min-height: 320px;
    padding: 0.7rem;
    gap: 0.6rem;
  }

  .messages {
    gap: 0.5rem;
    padding-right: 4px;
  }

  .message {
    max-width: 85%;
    padding: 0.5rem 0.6rem;
    font-size: 0.9rem;
  }

  .chat-form {
    gap: 0.4rem;
    padding-top: 0.4rem;
  }

  .chat-form input {
    padding: 0.6rem 0.7rem;
    font-size: 0.9rem;
  }

  .chat-form button {
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
  }

  .api-status {
    font-size: 0.8rem;
    padding: 0.35rem 0.5rem;
  }

  .api-setup {
    margin-top: 1.2rem;
    padding: 0.7rem;
    border-radius: 8px;
  }

  .api-setup h3 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
  }

  .api-setup input,
  .api-setup textarea {
    padding: 0.5rem;
    font-size: 0.85rem;
  }

  .api-setup p {
    font-size: 0.75rem;
    margin-top: 0.3rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 13px;
    padding-top: 60px;
  }

  header, main, footer {
    padding: 0.5rem;
  }

  main {
    max-width: 100%;
    overflow-x: hidden;
  }

  .ai-main-container {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin: 50px auto 15px;
    padding: 0.5rem;
    border-radius: 10px;
  }

  .ai-intro h2 {
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
  }

  .ai-intro p {
    font-size: 0.8rem;
    line-height: 1.3;
    margin-top: 0.3rem;
  }

  .chat-window {
    min-height: 250px;
    padding: 0.5rem;
    gap: 0.4rem;
    border-radius: 8px;
  }

  .messages {
    gap: 0.4rem;
    padding-right: 2px;
  }

  .message {
    max-width: 90%;
    padding: 0.4rem 0.5rem;
    font-size: 13px;
    border-radius: 8px;
  }

  .chat-form {
    gap: 0.3rem;
    padding-top: 0.3rem;
  }

  .chat-form input {
    padding: 0.5rem 0.6rem;
    font-size: 13px;
    border-radius: 6px;
  }

  .chat-form button {
    padding: 0.5rem 0.7rem;
    font-size: 13px;
    border-radius: 6px;
  }

  .api-status {
    font-size: 0.75rem;
    padding: 0.3rem 0.4rem;
    border-radius: 6px;
  }

  .api-setup {
    margin-top: 1rem;
    padding: 0.5rem;
    border-radius: 6px;
  }

  .api-setup h3 {
    font-size: 0.8rem;
    margin-bottom: 0.4rem;
  }

  .api-setup input,
  .api-setup textarea {
    padding: 0.4rem;
    font-size: 13px;
    border-radius: 6px;
  }

  .api-setup p {
    font-size: 0.7rem;
    margin-top: 0.25rem;
  }

  /* Ensure no overflow on any element */
  * {
    max-width: 100vw;
  }

  body {
    overflow-x: hidden;
  }
}

/* Accessibility: Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }

  .message,
  .chat-form input,
  .chat-form button {
    animation: none !important;
  }
}