:root[data-theme="light"] {
  --bg-main: #fcfcfd;
  --bg-surface: #ffffff;
  --text-main: #101828;
  --text-muted: #667085;
  --border-color: #f2f4f7;
  --msg-bot: #f8fafc;
  --msg-user: #f0fdf4;
  --primary: #0066cc;
  --primary-hover: #0052a3;
  --success: #12b76a;
  --error: #f04438;
}

:root[data-theme="dark"] {
  --bg-main: #0b0f19;
  --bg-surface: #111827;
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --border-color: #1f2937;
  --msg-bot: #1f2937;
  --msg-user: #064e3b;
  --primary: #38bdf8;
  --primary-hover: #7dd3fc;
  --success: #34d399;
  --error: #f87171;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", sans-serif;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  height: 100dvh;
  overflow: hidden;
}

.app-layout {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  width: 100%;
}

/* Navbar Fixa */
.navbar {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-icon {
  color: var(--primary);
}
.brand-text h1 {
  font-size: 0.95rem;
  font-weight: 600;
}
.brand-text span {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.nav-actions {
  display: flex;
  gap: 8px;
}

.nav-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 6px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Área Interna de Scroll */
.chat-area {
  flex: 1;
  overflow-y: auto;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 16px 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.message-row {
  display: flex;
  flex-direction: column;
  width: 100%;
  animation: fadeInUp 0.2s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message-bubble {
  max-width: 90%;
  padding: 12px 16px;
  border-radius: 12px;
  line-height: 1.5;
  font-size: 0.95rem;
}

.bot-style {
  background-color: var(--msg-bot);
  align-self: flex-start;
  border: 1px solid var(--border-color);
}
.bot-style b,
.bot-style strong {
  color: var(--primary);
}

.user-style {
  background-color: var(--msg-user);
  color: var(--text-main);
  align-self: flex-end;
  font-family: monospace;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  white-space: pre-wrap;
}

/* Previews de Elementos HTML */
.markdown-preview-box {
  margin-top: 10px;
  padding: 10px;
  background: var(--bg-surface);
  border-left: 4px solid var(--success);
  border-radius: 6px;
  font-size: 0.9rem;
}
.markdown-preview-box blockquote {
  border-left: 3px solid var(--text-muted);
  padding-left: 8px;
  color: var(--text-muted);
  font-style: italic;
}
.markdown-preview-box code {
  background: var(--bg-main);
  padding: 2px 4px;
  border-radius: 4px;
  font-family: monospace;
  color: var(--error);
}
.markdown-preview-box hr {
  border: 0;
  height: 1px;
  background: var(--text-muted);
  margin: 8px 0;
}
.markdown-preview-box ul,
.markdown-preview-box ol {
  padding-left: 16px;
}
.markdown-preview-box img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

/* Rodapé Fixo Ajustado para Mobile */
.input-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 12px 16px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom));
  flex-shrink: 0;
}

.container-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feedback-status {
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
}
.feedback-status.correct {
  color: var(--success);
  font-weight: 600;
}
.feedback-status.incorrect {
  color: var(--error);
}

.input-field-group {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

textarea {
  flex: 1;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-main);
  color: var(--text-main);
  outline: none;
  font-size: 0.95rem;
  resize: none;
  max-height: 80px;
  line-height: 1.4;
}
textarea:focus {
  border-color: var(--primary);
}

#btn-send {
  background-color: var(--primary);
  color: #ffffff;
  border: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
#btn-send:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.navigation-controls {
  display: flex;
  justify-content: space-between;
  padding-top: 2px;
}
.control-link {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}
.control-link:hover {
  color: var(--text-main);
}
.action-button-container {
  margin-top: 10px;
}
.prime-btn {
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

/* Resultado da Prova */
.exam-result-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
  line-height: 1.4;
}
.exam-result-item:last-child {
  border-bottom: none;
}
.exam-result-icon {
  flex-shrink: 0;
  font-size: 1rem;
}
.exam-result-detail {
  flex: 1;
}
.exam-result-detail .your-answer {
  color: var(--text-muted);
  font-family: monospace;
  font-size: 0.85rem;
}
.exam-result-correct {
  color: var(--success);
}
.exam-result-wrong {
  color: var(--error);
}