:root {
  --ltm-bg: #f6fbf8;
  --ltm-card: #ffffff;
  --ltm-text: #17312a;
  --ltm-muted: #55706a;
  --ltm-border: #dbeae5;
  --ltm-accent: #2f8f75;
  --ltm-accent-dark: #1f6d59;
  --ltm-soft: #eaf7f1;
  --ltm-warn: #fff6d8;
}

.ltm-ai-wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 34px 18px 54px;
  color: var(--ltm-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.ltm-ai-hero {
  background: linear-gradient(135deg, #eaf7f1, #fffdf5);
  border: 1px solid var(--ltm-border);
  border-radius: 28px;
  padding: 34px;
  box-shadow: 0 18px 45px rgba(33, 89, 75, 0.08);
}

.ltm-ai-hero h1,
.ltm-ai-wrap h1,
.ltm-ai-wrap h2,
.ltm-ai-wrap h3 {
  color: var(--ltm-text);
  line-height: 1.15;
}

.ltm-ai-hero p,
.ltm-ai-wrap p,
.ltm-ai-wrap li {
  color: var(--ltm-muted);
  font-size: 17px;
  line-height: 1.65;
}

.ltm-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.ltm-card {
  background: var(--ltm-card);
  border: 1px solid var(--ltm-border);
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 12px 28px rgba(20, 68, 55, 0.06);
}

.ltm-card strong {
  color: var(--ltm-text);
}

.ltm-button,
a.ltm-button,
button.ltm-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--ltm-accent);
  color: #fff !important;
  border: 0;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 10px 18px rgba(47, 143, 117, 0.18);
}

.ltm-button:hover { background: var(--ltm-accent-dark); }

.ltm-button.secondary,
a.ltm-button.secondary {
  background: #fff;
  color: var(--ltm-accent-dark) !important;
  border: 1px solid var(--ltm-border);
  box-shadow: none;
}

.ltm-form label {
  display: block;
  font-weight: 700;
  margin: 16px 0 6px;
  color: var(--ltm-text);
}

.ltm-form input,
.ltm-form textarea,
.ltm-form select {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--ltm-border);
  border-radius: 14px;
  padding: 13px 14px;
  font-size: 16px;
  background: #fff;
  color: var(--ltm-text);
}

.ltm-consent {
  background: var(--ltm-warn);
  border: 1px solid #f1df9e;
  border-radius: 18px;
  padding: 16px;
  margin: 18px 0;
}

.ltm-small {
  font-size: 14px !important;
  line-height: 1.45 !important;
  color: var(--ltm-muted) !important;
}

.ltm-chat-box {
  height: 460px;
  overflow-y: auto;
  background: #fbfffd;
  border: 1px solid var(--ltm-border);
  border-radius: 22px;
  padding: 18px;
  margin: 18px 0;
}

.ltm-msg {
  max-width: 82%;
  margin: 10px 0;
  padding: 13px 15px;
  border-radius: 18px;
  white-space: pre-wrap;
  line-height: 1.55;
}

.ltm-msg.user {
  margin-left: auto;
  background: var(--ltm-accent);
  color: #fff;
}

.ltm-msg.ai {
  margin-right: auto;
  background: var(--ltm-soft);
  color: var(--ltm-text);
}

.ltm-chat-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.ltm-teacher-badge {
  display: inline-block;
  padding: 6px 10px;
  background: var(--ltm-soft);
  color: var(--ltm-accent-dark);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 10px;
}

.ltm-notice {
  background: #fffdf5;
  border: 1px solid #eee1ab;
  border-radius: 18px;
  padding: 14px 16px;
  margin: 18px 0;
}

.ltm-cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

@media (max-width: 640px) {
  .ltm-ai-hero { padding: 24px 18px; }
  .ltm-chat-row { grid-template-columns: 1fr; }
  .ltm-msg { max-width: 100%; }
}

/* V2 teacher-choice and chat formatting improvements */
.ltm-teacher-select-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
  margin: 14px 0 22px;
}

.ltm-teacher-option {
  display: flex !important;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid var(--ltm-border);
  border-radius: 18px;
  padding: 14px;
  background: #fff;
  cursor: pointer;
  margin: 0 !important;
}

.ltm-teacher-option.recommended {
  background: var(--ltm-soft);
  border-color: rgba(47, 143, 117, 0.45);
}

.ltm-teacher-option input {
  width: auto !important;
  margin-top: 6px;
}

.ltm-teacher-face,
.ltm-teacher-avatar {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ltm-soft);
  font-size: 24px;
  flex: 0 0 auto;
}

.ltm-teacher-option-body {
  display: grid;
  gap: 3px;
}

.ltm-teacher-option-body em {
  font-style: normal;
  color: var(--ltm-accent-dark);
  font-weight: 700;
}

.ltm-teacher-option-body small {
  color: var(--ltm-muted);
  line-height: 1.35;
}

.teacher-card.selected {
  border-color: rgba(47, 143, 117, 0.65);
  background: linear-gradient(135deg, #ffffff, var(--ltm-soft));
  box-shadow: 0 16px 34px rgba(47, 143, 117, 0.12);
}

.ltm-msg p {
  margin: 0 0 12px;
}

.ltm-msg p:last-child {
  margin-bottom: 0;
}

.ltm-msg strong {
  color: inherit;
}

.ltm-topic-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.ltm-topic-card a {
  color: var(--ltm-accent-dark);
  text-decoration: none;
}

.ltm-topic-card a:hover {
  text-decoration: underline;
}

.ltm-article-body {
  max-width: 840px;
}

.ltm-article-body h2,
.ltm-article-body h3 {
  margin-top: 28px;
}