/* ===== HEADER ===== */
.chat-header {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-darker));
  color: #fff;
  padding: 18px 20px 14px;
  text-align: center;
  box-shadow: var(--shadow-md);
  position: relative;
}
.chat-header h1 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 2px;
  letter-spacing: -0.3px;
}
.chat-header p {
  font-size: 13px;
  opacity: 0.92;
  font-weight: 400;
}
.chat-header .badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 11px;
  margin-top: 6px;
  font-weight: 500;
}

/* ===== LAYOUT ===== */
body {
  display: flex;
  flex-direction: column;
}

/* ===== CHAT AREA ===== */
.chat-container {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  max-width: 88%;
  padding: 14px 18px;
  border-radius: 18px;
  font-size: 15px;
  line-height: 1.55;
  word-wrap: break-word;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message.bot {
  align-self: flex-start;
  background: var(--color-surface);
  border-bottom-left-radius: 6px;
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
  border-left: 3px solid var(--color-primary);
}
.message.user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border-bottom-right-radius: 6px;
  box-shadow: var(--shadow-primary);
}
.message .timestamp {
  font-size: 10px;
  opacity: 0.65;
  margin-top: 6px;
  display: block;
  letter-spacing: 0.2px;
}
.message.user .timestamp {
  text-align: right;
  color: rgba(255, 255, 255, 0.8);
}
.message.bot .timestamp {
  color: var(--color-accent-strong);
}

.typing-indicator {
  align-self: flex-start;
  background: var(--color-surface);
  padding: 14px 22px;
  border-radius: 18px;
  border-bottom-left-radius: 6px;
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--color-primary);
  display: flex;
  gap: 5px;
  align-items: center;
}
.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--color-primary-disabled);
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out;
}
.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}
.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}
@keyframes typing {
  0%,
  80%,
  100% {
    transform: scale(0.6);
  }
  40% {
    transform: scale(1);
  }
}

/* ===== INPUT AREA ===== */
.input-area {
  background: var(--color-surface);
  padding: 12px 16px;
  padding-bottom: max(12px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.input-area textarea {
  flex: 1;
  border: 1.5px solid var(--color-border);
  border-radius: 24px;
  padding: 11px 18px;
  font-size: 15px;
  font-family: inherit;
  color: var(--color-text);
  resize: none;
  outline: none;
  min-height: 46px;
  max-height: 120px;
  line-height: 1.4;
  background: var(--color-surface-soft);
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}
.input-area textarea:focus,
.input-area textarea:focus-visible {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
}
.input-area textarea::placeholder {
  color: var(--color-text-faint);
}
.input-area button {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
  box-shadow: var(--shadow-primary);
}
.input-area button:hover:not(:disabled) {
  transform: scale(1.05);
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-darker));
}
.input-area button:active:not(:disabled) {
  transform: scale(0.95);
}
.input-area button:focus-visible {
  outline: 2px solid var(--color-primary-darker);
  outline-offset: 2px;
}
.input-area button:disabled {
  background: var(--color-primary-disabled);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}
.input-area button svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* ===== LANGUAGE SELECTOR OVERLAY ===== */
.lang-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.35s ease;
  backdrop-filter: blur(4px);
}
.lang-overlay[hidden] {
  display: none;
}
.lang-modal {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: 36px 28px 28px;
  max-width: 340px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-modal);
  border: 1px solid var(--color-border);
}
.lang-modal .icon {
  font-size: 48px;
  margin-bottom: 12px;
  display: block;
}
.lang-modal h2 {
  font-size: 22px;
  margin-bottom: 4px;
  color: var(--color-text);
  font-weight: 700;
}
.lang-modal p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  line-height: 1.5;
}
.lang-btn {
  display: block;
  width: 100%;
  padding: 16px;
  margin-bottom: 12px;
  border: 2px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-surface-soft);
  font-size: 17px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s;
  color: var(--color-text);
}
.lang-btn:last-child {
  margin-bottom: 0;
}
.lang-btn:hover,
.lang-btn:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-surface-alt);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.15);
}
.lang-btn:active {
  transform: translateY(0);
}
.lang-btn .sub {
  display: block;
  font-weight: 400;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 3px;
}

/* ===== DISCLAIMER ===== */
.disclaimer {
  background: linear-gradient(135deg, #fef3cd, var(--color-border));
  padding: 10px 16px;
  text-align: center;
  font-size: 12px;
  color: var(--color-heading-strong);
  line-height: 1.5;
  border-bottom: 1px solid var(--color-border-strong);
  font-weight: 500;
}

/* ===== SCROLLBAR ===== */
.chat-container::-webkit-scrollbar {
  width: 6px;
}
.chat-container::-webkit-scrollbar-track {
  background: transparent;
}
.chat-container::-webkit-scrollbar-thumb {
  background: var(--color-primary-disabled);
  border-radius: 3px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
  .message {
    max-width: 92%;
    font-size: 14px;
    padding: 12px 14px;
  }
  .chat-header h1 {
    font-size: 17px;
  }
  .lang-modal {
    padding: 28px 20px 24px;
  }
  .lang-btn {
    padding: 14px;
    font-size: 16px;
  }
}