/* ── Shared drawer overlay ── */
.drawer-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,0.25); opacity: 0; pointer-events: none;
  transition: opacity .3s ease;
}
.drawer-overlay.open { opacity: 1; pointer-events: all; }

/* ── AI assistant drawer ── */
.ai-drawer {
  position: fixed; top: 0; right: 0; bottom: 0;
  width: 420px; max-width: 92vw; background: var(--bg);
  box-shadow: -8px 0 40px rgba(0,0,0,0.18);
  transform: translateX(100%);
  transition: transform .35s cubic-bezier(.4,0,.2,1), width .3s ease;
  z-index: 102; display: flex; flex-direction: column; overflow: hidden;
}
.ai-drawer.open { transform: translateX(0); }
.ai-drawer.expanded { width: 65vw; }
.ai-drawer.fullscreen { width: 100vw; }
.ai-drawer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
  background: var(--bg2); flex-shrink: 0; gap: 8px;
}
.ai-drawer-label { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; }
.ai-drawer-label-text {
  font-family: -apple-system, sans-serif; font-size: 10px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; color: var(--text3); white-space: nowrap;
}
.ai-drawer-question {
  font-family: -apple-system, sans-serif; font-size: 12px; color: var(--text2);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  min-width: 0; font-style: italic;
}
.ai-drawer-controls { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.ai-ctrl-btn {
  width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--border2);
  background: white; display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--text2); transition: background .15s, color .15s;
}
.ai-ctrl-btn:hover { background: var(--teal-l); color: var(--teal); border-color: var(--teal); }
.ai-ctrl-btn.active { background: var(--teal-l); color: var(--teal); border-color: var(--teal); }
.ai-drawer-body {
  flex: 1; overflow-y: auto; padding: 20px 22px 24px;
  display: flex; flex-direction: column; gap: 16px;
}
.ai-question-chip {
  background: var(--teal-l); border-radius: 20px; padding: 8px 14px;
  align-self: flex-start; font-family: -apple-system, sans-serif;
  font-size: 13px; color: var(--teal); font-style: italic; max-width: 90%;
}
.ai-answer-block {
  background: #F8F8F6; border-radius: 12px; padding: 16px 18px;
  border: 0.5px solid var(--border2);
}
.ai-answer-text {
  font-family: -apple-system, sans-serif; font-size: 14px;
  color: var(--text); line-height: 1.75;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}
.ai-answer-text p { margin-bottom: 10px; }
.ai-answer-text p:last-child { margin-bottom: 0; }
.ai-answer-text .ai-disclaimer {
  margin-top: 12px;
  margin-bottom: 0;
  font-size: 10px;
  line-height: 1.35;
  color: var(--text3);
  opacity: 0.82;
  letter-spacing: 0.02em;
}
.ai-answer-text h1,
.ai-answer-text h2,
.ai-answer-text h3,
.ai-answer-text h4,
.ai-answer-text h5,
.ai-answer-text h6 {
  line-height: 1.3;
  margin: 0 0 10px;
}
.ai-answer-text h1 { font-size: 1.35em; }
.ai-answer-text h2 { font-size: 1.22em; }
.ai-answer-text h3 { font-size: 1.12em; }
.ai-answer-text ul,
.ai-answer-text ol {
  margin: 0 0 10px 20px;
  padding: 0;
}
.ai-answer-text li {
  margin-bottom: 4px;
}
.ai-answer-text blockquote {
  margin: 0 0 10px;
  padding: 2px 0 2px 12px;
  border-left: 3px solid var(--border2);
  color: var(--text2);
}
.ai-answer-text code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
  background: #eef1f5;
  padding: 1px 5px;
  border-radius: 4px;
  overflow-wrap: anywhere;
}
.ai-answer-text pre {
  margin: 0 0 10px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #0f172a;
  color: #e2e8f0;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.ai-answer-text pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
}
.ai-answer-text a {
  color: var(--teal);
  text-decoration: underline;
  overflow-wrap: anywhere;
}
.ai-loading {
  display: flex; align-items: center; gap: 10px;
  font-family: -apple-system, sans-serif; font-size: 13px; color: var(--text3);
}
.ai-loading-dots { display: flex; gap: 4px; }
.ai-loading-dots span {
  width: 6px; height: 6px; border-radius: 50%; background: var(--teal); opacity: 0.4;
  animation: dot-pulse 1.2s ease-in-out infinite;
}
.ai-loading-dots span:nth-child(2) { animation-delay: .2s; }
.ai-loading-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes dot-pulse {
  0%,80%,100% { opacity:.15; transform:scale(.8); }
  40%          { opacity:1;   transform:scale(1.1); }
}
.ai-tool-rec {
  border: 1.5px solid var(--border2); border-radius: 12px; overflow: hidden;
  text-decoration: none; color: inherit; display: block;
  transition: box-shadow .2s, border-color .2s, transform .2s;
}
.ai-tool-rec:hover {
  box-shadow: var(--shadow-h); border-color: var(--teal); transform: translateY(-1px);
}
.ai-tool-rec-header {
  padding: 10px 14px 8px; display: flex; align-items: center; gap: 10px;
  border-bottom: 0.5px solid var(--border);
}
.ai-tool-rec-badge {
  font-family: -apple-system, sans-serif; font-size: 9px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  padding: 2px 8px; border-radius: 20px;
  background: var(--teal-l); color: var(--teal);
}
.ai-tool-rec-layer {
  font-family: -apple-system, sans-serif; font-size: 10px; color: var(--text3); margin-left: auto;
}
.ai-tool-rec-body { padding: 10px 14px 12px; }
.ai-tool-rec-name {
  font-family: -apple-system, sans-serif; font-size: 13px;
  font-weight: 700; color: var(--text); margin-bottom: 3px;
}
.ai-tool-rec-desc {
  font-family: -apple-system, sans-serif; font-size: 11px;
  color: var(--text2); line-height: 1.5;
}
.ai-tool-rec-footer {
  padding: 8px 14px; background: var(--bg2); border-top: 0.5px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.ai-tool-rec-cta {
  font-family: -apple-system, sans-serif; font-size: 11px; font-weight: 600;
  color: var(--teal); display: flex; align-items: center; gap: 4px;
}
.ai-tool-rec-arrow { transition: transform .2s; }
.ai-tool-rec:hover .ai-tool-rec-arrow { transform: translateX(3px); }
.ai-followup-wrap {
  border-top: 1px solid var(--border); padding: 12px 16px;
  background: var(--bg2); flex-shrink: 0; display: flex; gap: 8px; align-items: center;
}
.ai-followup-input {
  flex: 1; border: 1px solid var(--border2); border-radius: 20px; padding: 8px 14px;
  font-family: -apple-system, sans-serif; font-size: 13px; color: var(--text);
  outline: none; background: white; transition: border-color .2s;
}
.ai-followup-input:focus { border-color: var(--teal); }
.ai-followup-btn {
  width: 32px; height: 32px; border-radius: 50%; background: var(--teal);
  border: none; cursor: pointer; display: flex; align-items: center;
  justify-content: center; color: white; transition: background .15s; flex-shrink: 0;
}
.ai-followup-btn:hover { filter: brightness(0.9); }
.ai-followup-btn:disabled { background: #ccc; cursor: not-allowed; }

/* ── Instructor drawer ── */
.inst-drawer {
  position: fixed; top: 0; right: 0; bottom: 0;
  width: 380px; max-width: 92vw; background: white;
  box-shadow: -8px 0 40px rgba(0,0,0,0.18);
  transform: translateX(100%); transition: transform .35s cubic-bezier(.4,0,.2,1);
  z-index: 101; display: flex; flex-direction: column; overflow: hidden;
}
.inst-drawer.open { transform: translateX(0); }
.inst-drawer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px 16px; border-bottom: 1px solid var(--border);
  background: var(--bg2); flex-shrink: 0;
}
.inst-drawer-label {
  font-family: -apple-system, sans-serif; font-size: 10px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; color: var(--text3);
}
.inst-drawer-close {
  width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--border2);
  background: white; display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--text2); transition: background .15s, color .15s;
}
.inst-drawer-close:hover { background: var(--teal-l); color: var(--teal); }
.inst-drawer-body { flex: 1; overflow-y: auto; padding: 24px 24px 32px; }
.inst-photo-row { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.inst-photo {
  width: 72px; height: 72px; border-radius: 50%;
  object-fit: cover; object-position: center 12%;
  border: 2px solid var(--border2); box-shadow: var(--shadow); flex-shrink: 0;
}
.inst-name {
  font-family: -apple-system, sans-serif; font-size: 16px;
  font-weight: 700; color: var(--text); margin-bottom: 3px;
}
.inst-role {
  font-family: -apple-system, sans-serif; font-size: 12px;
  color: var(--text2); line-height: 1.4;
}
.inst-school {
  font-family: -apple-system, sans-serif; font-size: 11px; color: var(--text3); margin-top: 2px;
}
.inst-divider { height: 1px; background: var(--border); margin: 18px 0; }
.inst-quote {
  font-family: Georgia, serif; font-size: 13px; font-style: italic;
  color: var(--teal); line-height: 1.7;
  border-left: 3px solid var(--teal); padding-left: 14px; margin-bottom: 16px;
}
.inst-bio {
  font-family: -apple-system, sans-serif; font-size: 13px;
  color: var(--text2); line-height: 1.7;
}
.inst-contact { display: flex; flex-direction: column; gap: 10px; margin-top: 20px; }
.inst-contact-item {
  display: flex; align-items: center; gap: 10px;
  font-family: -apple-system, sans-serif; font-size: 12px;
  color: var(--text2); text-decoration: none; transition: color .15s;
}
.inst-contact-item:hover { color: var(--teal); }
.inst-contact-icon {
  width: 28px; height: 28px; border-radius: 7px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.inst-contact-icon.teal { background: var(--teal-l); color: var(--teal); }
.inst-contact-icon.li   { background: #0A66C2; color: white; }