/* Professeur Xporia : composants isolés, couleurs héritées du site. */
.xt-root {
  --xt-accent: #4f46e5;
  --xt-accent-deep: #3730a3;
  --xt-tint: color-mix(in srgb, var(--xt-accent) 7%, var(--panel, #fff));
  --xt-border: color-mix(in srgb, var(--xt-accent) 16%, var(--line, #e0e7ff));
  color: var(--ink, #0f172a);
  min-width: 0;
  max-width: 100%;
  font-size: 15px;
  line-height: 1.5;
}
.xt-root[data-teacher-color="green"] { --xt-accent: #047857; --xt-accent-deep: #065f46; }
.xt-root[data-teacher-color="orange"] { --xt-accent: #b45309; --xt-accent-deep: #92400e; }
.xt-root[data-teacher-color="red"] { --xt-accent: #be185d; --xt-accent-deep: #9d174d; }
.xt-root[data-teacher-color="yellow"] { --xt-accent: #926000; --xt-accent-deep: #754c00; }
.xt-root *, .xt-root *::before, .xt-root *::after { box-sizing: border-box; }
.xt-root [hidden] { display: none !important; }
.xt-root :is(h2, h3, h4, p, figure, fieldset) { margin: 0; }
.xt-root :is(h2, h3, h4) { color: var(--ink, #0f172a); overflow-wrap: anywhere; }
.xt-root h2 { font-size: clamp(25px, 3vw, 35px); line-height: 1.18; letter-spacing: -.035em; font-weight: 850; }
.xt-root h3 { font-size: 20px; line-height: 1.3; letter-spacing: -.02em; }
.xt-root h4 { font-size: 17px; line-height: 1.45; }
.xt-root :is(button, input, select, textarea) { font-family: inherit; }
.xt-root :is(button, input, select, textarea):focus-visible { outline: 3px solid color-mix(in srgb, var(--xt-accent) 60%, white); outline-offset: 3px; }
.xt-root button { -webkit-tap-highlight-color: transparent; }
.xt-root button:disabled { cursor: wait; opacity: .6; }
.xt-root .xt-muted { color: var(--muted, #5c6478); }
.xt-root .xt-eyebrow { font-size: 10px; font-weight: 850; letter-spacing: .13em; color: var(--xt-accent); line-height: 1.5; }
.xt-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 25px; }
.xt-heading > div:first-child { display: grid; gap: 9px; min-width: 0; }
.xt-heading-controls { display: flex; align-items: flex-end; flex-shrink: 0; gap: 10px; }
.xt-root .xt-heading-controls .xt-field { max-width: 170px; }
.xt-tabs { display: flex; gap: 4px; width: fit-content; max-width: 100%; padding: 5px; margin-bottom: 22px; border: 1px solid var(--xt-border); border-radius: 14px; background: var(--panel, #fff); }
.xt-tab { min-height: 42px; padding: 9px 17px; border: 0; border-radius: 10px; background: transparent; color: var(--muted, #5c6478); font-size: 14px; font-weight: 750; cursor: pointer; white-space: nowrap; }
.xt-tab[aria-selected="true"] { color: var(--xt-accent-deep); background: var(--xt-tint); box-shadow: 0 1px 4px color-mix(in srgb, var(--xt-accent) 9%, transparent); }
.xt-panel { min-width: 0; }
.xt-chat-layout { display: grid; grid-template-columns: minmax(0, 1fr); align-items: start; gap: 16px; }
.xt-history { min-width: 0; padding: 14px; border: 1px solid var(--xt-border); border-radius: 18px; background: var(--panel, #fff); }
.xt-history > summary { cursor: pointer; font-size: 14px; font-weight: 750; min-height: 30px; color: var(--ink, #0f172a); }
.xt-history[open] > summary { margin-bottom: 12px; }
.xt-history-list { display: grid; gap: 5px; margin-top: 12px; max-height: 440px; overflow-y: auto; overscroll-behavior: contain; }
.xt-root .xt-history-list > p { padding: 12px 3px; font-size: 13px; }
.xt-history-row { display: flex; gap: 4px; align-items: center; border-radius: 10px; }
.xt-history-open { display: grid; gap: 3px; flex: 1; min-width: 0; padding: 10px; border: 0; border-radius: 10px; text-align: left; background: transparent; color: var(--ink, #0f172a); cursor: pointer; }
.xt-history-open strong { font-size: 13px; font-weight: 650; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.xt-history-open small { font-size: 11px; color: var(--muted, #5c6478); }
.xt-history-open[aria-current="true"], .xt-history-open:hover { background: var(--xt-tint); color: var(--xt-accent-deep); }
.xt-icon-button { width: 36px; height: 36px; border: 0; border-radius: 9px; color: var(--muted, #5c6478); background: transparent; font-size: 22px; cursor: pointer; }
.xt-icon-button:hover { color: #be123c; background: color-mix(in srgb, #be123c 8%, var(--panel, #fff)); }
.xt-chat-card { overflow: hidden; min-width: 0; border: 1px solid var(--xt-border); border-radius: 23px; background: var(--panel, #fff); box-shadow: 0 10px 35px color-mix(in srgb, var(--xt-accent) 5%, transparent); }
.xt-root .xt-chat-title { padding: 18px 22px; border-bottom: 1px solid var(--line, #e0e7ff); font-size: 14px; font-weight: 650; background: linear-gradient(110deg, var(--xt-tint), var(--panel, #fff)); }
.xt-chat-log { display: flex; flex-direction: column; align-items: stretch; gap: 21px; height: clamp(300px, 50dvh, 540px); overflow-y: auto; overflow-x: hidden; padding: 24px; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-color: var(--xt-border) transparent; scroll-behavior: auto; }
.xt-chat-log > .xt-empty { margin: auto 0; padding: 15px; }
.xt-bubble { flex: 0 0 auto; max-width: 93%; min-width: 0; overflow-wrap: anywhere; }
.xt-bubble-user { align-self: flex-end; padding: 13px 17px; border-radius: 19px 19px 4px 19px; background: var(--xt-tint); }
.xt-bubble-teacher { align-self: stretch; }
.xt-message-author { display: block; margin-bottom: 7px; color: var(--xt-accent); font-size: 11px; font-weight: 850; letter-spacing: .025em; }
.xt-bubble-user .xt-message-author { color: var(--muted, #5c6478); }
.xt-root .xt-prose { white-space: pre-wrap; line-height: 1.75; overflow-wrap: anywhere; }
.xt-root .xt-prose + .xt-prose { margin-top: 12px; }
.xt-prose code { border-radius: 5px; padding: 2px 5px; font-size: .92em; background: var(--panel-soft, #f5f7ff); color: inherit; }
.xt-root .xt-prose strong { color: inherit; }
.xt-attachment-label { display: block; margin-top: 9px; font-size: 12px; color: var(--muted, #5c6478); }
.xt-root .xt-notice { margin-top: 12px; padding-left: 12px; border-left: 3px solid #d97706; color: var(--muted, #5c6478); font-size: 13px; }
.xt-root .xt-thinking { padding: 12px 0; font-size: 13px; color: var(--muted, #5c6478); }
.xt-thinking::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 9px; border-radius: 50%; background: var(--xt-accent); animation: xt-pulse 1.3s ease infinite; }
.xt-composer { padding: 18px; border-top: 1px solid var(--line, #e0e7ff); }
.xt-message-input { width: 100%; min-height: 82px; resize: vertical; max-height: 250px; padding: 13px 15px; border: 1px solid var(--xt-border); border-radius: 13px; color: var(--ink, #0f172a); background: var(--control-bg, #fff); font-size: 16px; line-height: 1.6; }
.xt-message-input::placeholder, .xt-input::placeholder { color: var(--muted, #5c6478); opacity: .85; }
.xt-composer-footer { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 10px; }
.xt-file-input { display: none !important; }
.xt-root .xt-credit-hint { margin-top: 9px; color: var(--muted, #5c6478); font-size: 11px; line-height: 1.6; }
.xt-root .xt-privacy { padding: 0 20px 16px; color: var(--muted, #5c6478); font-size: 11px; line-height: 1.6; }
.xt-root .xt-status { margin: 12px 0; padding: 11px 14px; border-radius: 11px; background: var(--xt-tint); color: var(--xt-accent-deep); font-size: 13px; overflow-wrap: anywhere; }
.xt-chat-card > .xt-status { margin: 0 18px 12px; }
.xt-root .xt-status.xt-error { color: #9f1239; background: #fff1f2; border: 1px solid #fecdd3; }
.xt-button { display: inline-flex; gap: 7px; align-items: center; justify-content: center; min-height: 43px; padding: 10px 15px; border: 1px solid var(--xt-border); border-radius: 11px; font-size: 13px; font-weight: 750; line-height: 1.35; text-decoration: none; cursor: pointer; transition: background .16s, border-color .16s; }
.xt-primary { color: #fff; border-color: var(--xt-accent); background: var(--xt-accent); box-shadow: 0 3px 8px color-mix(in srgb, var(--xt-accent) 18%, transparent); }
.xt-primary:hover:not(:disabled) { background: var(--xt-accent-deep); border-color: var(--xt-accent-deep); }
.xt-secondary { color: var(--xt-accent-deep); background: var(--panel, #fff); }
.xt-secondary:hover:not(:disabled) { background: var(--xt-tint); }
.xt-text-button { padding: 7px 0; min-height: 38px; border: 0; background: transparent; color: var(--xt-accent); font-size: 13px; font-weight: 750; text-align: left; cursor: pointer; }
.xt-new-chat { width: 100%; }
.xt-file-preview { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; padding: 10px; border-radius: 13px; background: var(--xt-tint); }
.xt-file-preview img { width: 48px; height: 48px; border-radius: 8px; object-fit: cover; flex-shrink: 0; }
.xt-file-preview > span { flex: 1; min-width: 0; overflow-wrap: anywhere; font-size: 13px; }
.xt-file-preview > button { flex-shrink: 0; }
.xt-root .xt-vision { min-width: 0; padding: 0 0 12px; border: 0; }
.xt-vision legend { margin-bottom: 7px; color: var(--muted, #5c6478); font-size: 12px; font-weight: 750; }
.xt-vision-options { display: flex; flex-wrap: wrap; gap: 6px; }
.xt-choice { flex: 1 1 140px; min-height: 39px; padding: 7px 9px; border: 1px solid var(--xt-border); border-radius: 9px; color: var(--muted, #5c6478); background: var(--panel, #fff); font-size: 12px; line-height: 1.4; cursor: pointer; }
.xt-choice[aria-pressed="true"] { color: var(--xt-accent-deep); border-color: var(--xt-accent); background: var(--xt-tint); }
.xt-empty { display: grid; justify-items: center; gap: 10px; padding: 40px 20px; text-align: center; }
.xt-empty-mark { display: grid; place-items: center; width: 46px; height: 46px; margin-bottom: 4px; border-radius: 15px; color: var(--xt-accent); background: var(--xt-tint); font-size: 28px; }
.xt-root .xt-empty h3 { font-size: 20px; }
.xt-root .xt-empty p { max-width: 430px; color: var(--muted, #5c6478); font-size: 14px; }
.xt-empty-compact { border: 1px dashed var(--xt-border); border-radius: 18px; padding: 25px 20px; }
.xt-empty-compact .xt-empty-mark { display: none; }
.xt-root .xt-empty-compact h3 { font-size: 17px; }
.xt-field { display: grid; gap: 7px; min-width: 0; }
.xt-field-label { font-size: 12px; font-weight: 650; color: var(--muted, #5c6478); }
.xt-input { width: 100%; min-width: 0; min-height: 43px; padding: 10px 12px; border: 1px solid var(--xt-border); border-radius: 10px; color: var(--ink, #0f172a); background: var(--control-bg, #fff); font-size: 16px; line-height: 1.4; }
.xt-card { display: flex; flex-direction: column; align-items: flex-start; gap: 13px; min-width: 0; padding: 23px; border: 1px solid var(--xt-border); border-radius: 20px; background: var(--panel, #fff); }
.xt-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); gap: 14px; }
.xt-card-grid .xt-card > button { margin-top: auto; }
.xt-section-head { display: grid; gap: 8px; margin-bottom: 22px; }
.xt-root .xt-section-intro { margin-bottom: 18px; color: var(--muted, #5c6478); }
.xt-root .xt-path-form { margin-bottom: 23px; }
.xt-form-grid { width: 100%; display: grid; grid-template-columns: 1.5fr 1fr; gap: 14px; }
.xt-recommendation { display: flex; flex-direction: column; gap: 8px; padding: 20px; border: 1px solid var(--xt-border); border-radius: 18px; background: var(--panel, #fff); }
.xt-recommendation > button { margin-top: auto; }
.xt-skills { margin-top: 25px; }
.xt-root .xt-skills h3 { margin-bottom: 11px; font-size: 18px; }
.xt-skill-row { display: flex; justify-content: space-between; align-items: center; gap: 15px; padding: 14px 0; border-bottom: 1px solid var(--line, #e0e7ff); }
.xt-skill-row > div { display: grid; gap: 3px; min-width: 0; }
.xt-skill-row strong { font-size: 14px; overflow-wrap: anywhere; }
.xt-skill-row small { display: block; font-size: 12px; }
.xt-badge { flex-shrink: 0; padding: 5px 9px; border-radius: 8px; color: var(--muted, #5c6478); background: var(--panel-soft, #f5f7ff); font-size: 11px; font-weight: 650; }
.xt-badge-mastered { color: #047857; background: #ecfdf5; }
.xt-badge-review { color: #9a3412; background: #fff7ed; }
.xt-badge-learning { color: var(--xt-accent); background: var(--xt-tint); }
.xt-home-card { display: flex; align-items: center; gap: 17px; padding: 23px; margin-bottom: 16px; border: 1px solid var(--xt-border); border-radius: 22px; background: linear-gradient(115deg, var(--panel, #fff), var(--xt-tint)); }
.xt-home-card > div { display: grid; flex: 1; min-width: 0; gap: 5px; }
.xt-root .xt-home-card h3 { font-size: 20px; }
.xt-home-card p.xt-muted { font-size: 13px; }
.xt-home-mark { display: grid; flex-shrink: 0; place-items: center; width: 49px; height: 49px; border-radius: 15px; color: var(--xt-accent); background: var(--xt-tint); font-size: 29px; }
.xt-home-card > button { flex-shrink: 0; }
.xt-progress-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 16px 0; }
.xt-progress-summary article { display: grid; gap: 4px; padding: 15px; border-radius: 14px; background: var(--xt-tint); }
.xt-progress-summary strong { color: var(--xt-accent); font-size: 26px; font-weight: 850; }
.xt-progress-summary span { font-size: 12px; }
.xt-subject-progress { display: grid; gap: 13px; margin: 24px 0; }
.xt-subject-row { display: grid; grid-template-columns: minmax(90px, 1fr) 2fr; gap: 6px 16px; align-items: center; }
.xt-subject-row strong { font-size: 13px; overflow-wrap: anywhere; }
.xt-subject-row small { grid-column: 2; font-size: 11px; }
.xt-root progress { width: 100%; height: 7px; border: 0; border-radius: 10px; overflow: hidden; color: var(--xt-accent); background: var(--track-bg, #ece9f4); }
.xt-root progress::-webkit-progress-bar { background: var(--track-bg, #ece9f4); border-radius: 10px; }
.xt-root progress::-webkit-progress-value { background: var(--xt-accent); border-radius: 10px; }
.xt-root progress::-moz-progress-bar { background: var(--xt-accent); border-radius: 10px; }
.xt-practice-start .xt-field { width: 100%; }
.xt-root .xt-practice-start p { font-size: 13px; }
.xt-practice-history { margin-top: 25px; }
.xt-session-row { display: flex; gap: 14px; align-items: center; justify-content: space-between; padding: 15px 0; border-bottom: 1px solid var(--line, #e0e7ff); }
.xt-session-row > div { min-width: 0; display: grid; gap: 4px; }
.xt-session-row > .xt-session-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.xt-session-row strong { font-size: 14px; overflow-wrap: anywhere; }
.xt-session-row small { font-size: 12px; }
.xt-root .xt-delete-button { color: #be123c; border-color: color-mix(in srgb, #be123c 28%, var(--xt-border)); }
.xt-root .xt-delete-button:hover { background: color-mix(in srgb, #be123c 9%, var(--panel)); }
.xt-exercise-card { max-width: 860px; margin-inline: auto; }
.xt-exercise-header { display: flex; align-items: center; justify-content: space-between; gap: 15px; width: 100%; }
.xt-root .xt-question { margin-top: 15px; font-size: clamp(19px, 2.7vw, 25px); font-weight: 750; white-space: pre-wrap; line-height: 1.55; }
.xt-skill-label { color: var(--muted, #5c6478); font-size: 12px; }
.xt-answer-form { width: 100%; display: grid; gap: 19px; }
.xt-root .xt-answers { display: grid; gap: 10px; min-width: 0; padding: 0; border: 0; }
.xt-answer-choice { display: flex; align-items: center; gap: 13px; min-height: 54px; padding: 13px 16px; border: 1px solid var(--xt-border); border-radius: 13px; cursor: pointer; background: var(--panel, #fff); color: var(--ink, #0f172a); overflow-wrap: anywhere; }
.xt-answer-choice:has(input:checked) { border-color: var(--xt-accent); background: var(--xt-tint); box-shadow: 0 0 0 1px var(--xt-accent); }
.xt-answer-choice input { width: 18px; height: 18px; flex-shrink: 0; accent-color: var(--xt-accent); }
.xt-written-answer { min-height: 130px; resize: vertical; }
.xt-feedback { width: 100%; padding: 20px; border-left: 3px solid var(--xt-accent); border-radius: 0 14px 14px 0; background: var(--xt-tint); }
.xt-root .xt-feedback h4 { margin-bottom: 12px; }
.xt-feedback-success { border-color: #059669; }
.xt-root .xt-result-count { font-size: 24px; font-weight: 850; color: var(--xt-accent); }
.xt-diagram { width: 100%; padding: 15px; border: 1px solid var(--xt-border); border-radius: 15px; background: #fff; color: #0f172a; }
.xt-diagram svg { display: block; width: 100%; height: auto; max-height: 430px; }
.xt-diagram figcaption { margin-top: 8px; color: #475569; font-size: 13px; text-align: center; }
.xt-root .xt-diagram-key { margin-top: 9px; color: #475569; font-size: 12px; }
.xt-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
body[data-theme="dark"] .xt-root { --xt-accent: #a5b4fc; --xt-accent-deep: #c7d2fe; --xt-tint: color-mix(in srgb, var(--xt-accent) 9%, var(--panel, #111827)); }
body[data-theme="dark"] .xt-root[data-teacher-color="green"] { --xt-accent: #6ee7b7; --xt-accent-deep: #a7f3d0; }
body[data-theme="dark"] .xt-root[data-teacher-color="orange"] { --xt-accent: #fdba74; --xt-accent-deep: #fed7aa; }
body[data-theme="dark"] .xt-root[data-teacher-color="red"] { --xt-accent: #f9a8d4; --xt-accent-deep: #fbcfe8; }
body[data-theme="dark"] .xt-root[data-teacher-color="yellow"] { --xt-accent: #fcd34d; --xt-accent-deep: #fde68a; }
body[data-theme="dark"] .xt-primary { color: #111827; }
body[data-theme="dark"] .xt-badge-mastered { color: #a7f3d0; background: #064e3b; }
body[data-theme="dark"] .xt-badge-review { color: #fed7aa; background: #7c2d12; }
body[data-theme="dark"] .xt-root .xt-status.xt-error { color: #fecdd3; background: #4c0519; border-color: #9f1239; }
@media (max-width: 760px) {
  .xt-heading { align-items: stretch; flex-direction: column; gap: 17px; margin-bottom: 18px; }
  .xt-heading-controls { width: 100%; }
  .xt-root .xt-heading-controls .xt-field { flex: 1; max-width: none; }
  .xt-tabs { width: 100%; }
  .xt-tab { flex: 1; padding: 9px 10px; font-size: 12px; }
  .xt-chat-log { height: clamp(280px, 44dvh, 440px); padding: 18px; }
  .xt-bubble { max-width: 100%; }
  .xt-chat-card { border-radius: 18px; }
  .xt-root .xt-chat-title { padding: 15px 18px; }
  .xt-composer { padding: 13px; }
  .xt-home-card { flex-wrap: wrap; padding: 19px; gap: 13px; }
  .xt-home-card > button { width: 100%; }
  .xt-root .xt-home-card h3 { font-size: 18px; }
  .xt-form-grid { grid-template-columns: 1fr; }
  .xt-card { padding: 18px; }
  .xt-exercise-header { flex-wrap: wrap; gap: 5px; }
  .xt-skill-row { flex-wrap: wrap; gap: 8px; }
  .xt-skill-row > div { flex: 1 1 160px; }
  .xt-progress-summary { gap: 7px; }
  .xt-progress-summary article { padding: 12px 9px; }
  .xt-progress-summary strong { font-size: 23px; }
  .xt-progress-summary span { font-size: 11px; }
}
@media (max-width: 390px) {
  .xt-composer-footer { flex-wrap: wrap; }
  .xt-composer-footer .xt-button { width: 100%; }
  .xt-tabs { gap: 0; padding: 3px; }
  .xt-tab { padding-inline: 7px; font-size: 11px; }
  .xt-chat-log { padding: 14px; }
  .xt-subject-row { grid-template-columns: 1fr; }
  .xt-subject-row small { grid-column: 1; }
  .xt-session-row { align-items: flex-start; flex-direction: column; gap: 9px; }
  .xt-diagram { padding: 7px; }
}
@keyframes xt-pulse { 50% { opacity: .35; transform: scale(.85); } }
@media (prefers-reduced-motion: reduce) { .xt-thinking::before { animation: none; } .xt-root * { scroll-behavior: auto !important; transition: none !important; } }
.xt-root .xt-understanding-check { display: grid; gap: 7px; padding: 14px 16px; margin-top: 16px; border-radius: 12px; background: var(--xt-tint); }
.xt-understanding-check > strong { font-size: 12px; color: var(--xt-accent); }
.xt-root .xt-saved-course { margin-top: 12px; color: var(--muted, #5c6478); font-size: 12px; }
.xt-course-points { margin: 0; padding-left: 20px; line-height: 1.8; }
.xt-course-points li + li { margin-top: 6px; }
.xt-root .xt-weekly-goal { margin: 0 0 19px; color: var(--muted, #5c6478); font-size: 13px; }
.xt-review-answers { width: 100%; }
.xt-review-answers > summary { cursor: pointer; min-height: 40px; padding-block: 9px; color: var(--xt-accent); font-weight: 750; font-size: 13px; }
.xt-review-answer { display: grid; gap: 10px; padding-block: 18px; border-top: 1px solid var(--line, #e0e7ff); }
.teacher-profile-tools { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0 22px; }
.teacher-profile-tools > :is(button, a) { min-height: 44px; }
.xt-goals-field { grid-column: 1 / -1; }
.xt-root .xt-credit-summary { display: grid; gap: 5px; margin: 15px 0 20px; padding: 17px; border: 1px solid var(--xt-border); border-radius: 15px; background: var(--xt-tint); }
.xt-credit-summary strong { color: var(--xt-accent); }
.xt-root .xt-credit-summary p { font-size: 12px; }
#teacherProgressRoot > .xt-empty + .xt-button { margin-top: 15px; }
.xt-chat-log.xt-chat-log-empty { display: none; }
@media (max-width: 760px) {
  .xt-chat-log-empty .xt-empty { padding: 8px; gap: 8px; }
  .xt-chat-log-empty .xt-empty-mark { display: none; }
  .xt-root .xt-chat-log-empty .xt-empty h3 { font-size: 18px; }
  .xt-root .xt-chat-log-empty .xt-empty p { font-size: 13px; }
}

/* One clear action first; history and preferences stay within reach. */
.xt-root .xt-heading { align-items: flex-start; }
.xt-root .xt-heading-controls { align-items: flex-start; }
.xt-appearance { min-width: 88px; padding-top: 24px; }
.xt-appearance > summary { min-height: 43px; padding: 10px 12px; border: 1px solid var(--xt-border); border-radius: 10px; color: var(--muted); cursor: pointer; font-size: 13px; }
.xt-appearance[open] > .xt-field { margin-top: 10px; }
.xt-picker { position: relative; min-width: 0; width: 100%; }
.xt-picker-trigger { display: flex; align-items: center; justify-content: space-between; gap: 10px; width: 100%; min-height: 43px; padding: 9px 12px; border: 1px solid var(--xt-border); border-radius: 10px; color: var(--ink); background: var(--control-bg, var(--panel)); font-size: 16px; font-weight: 600; text-align: left; cursor: pointer; }
.xt-picker-trigger:hover:not(:disabled), .xt-picker-trigger[aria-expanded="true"] { border-color: var(--xt-accent); background: var(--xt-tint); }
.xt-picker-value { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.xt-picker-chevron { flex-shrink: 0; color: var(--xt-accent); font-size: 20px; line-height: 1; transition: transform .15s ease; }
.xt-picker-trigger[aria-expanded="true"] .xt-picker-chevron { transform: rotate(180deg); }
.xt-picker-menu { position: absolute; z-index: 80; top: calc(100% + 7px); left: 0; width: max(100%, 220px); max-width: calc(100vw - 36px); max-height: min(350px, 52dvh); overflow-y: auto; overscroll-behavior: contain; padding: 6px; border: 1px solid var(--xt-border); border-radius: 14px; background: var(--panel); box-shadow: 0 16px 36px rgba(15, 23, 42, .2); }
.xt-color-picker .xt-picker-menu { left: auto; right: 0; }
.xt-picker-option { display: flex; align-items: center; gap: 10px; width: 100%; min-height: 42px; padding: 9px 11px; border: 0; border-radius: 9px; color: var(--ink); background: transparent; font-size: 14px; text-align: left; cursor: pointer; }
.xt-picker-option:hover, .xt-picker-option:focus-visible, .xt-picker-option[aria-selected="true"] { color: var(--xt-accent-deep); background: var(--xt-tint); }
.xt-picker-option-label { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.xt-picker-check { visibility: hidden; color: var(--xt-accent); font-weight: 800; }
.xt-picker-option[aria-selected="true"] .xt-picker-check { visibility: visible; }
.xt-picker-swatch { flex: 0 0 18px; width: 18px; height: 18px; border-radius: 50%; border: 1px solid rgba(15, 23, 42, .12); }
.xt-picker-swatch[data-color="blue"] { background: #4f46e5; }
.xt-picker-swatch[data-color="green"] { background: #047857; }
.xt-picker-swatch[data-color="orange"] { background: #ea580c; }
.xt-picker-swatch[data-color="red"] { background: #db2777; }
.xt-picker-swatch[data-color="yellow"] { background: #d6a300; }
.xt-help { padding: 12px 18px; border-top: 1px solid var(--line); }
.xt-help > summary { min-height: 32px; padding-block: 7px; cursor: pointer; font-size: 12px; color: var(--muted); }
.xt-root .xt-help .xt-privacy { padding: 8px 0 0; }
.xt-next-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.xt-next-actions .xt-button { min-height: 40px; padding: 8px 12px; font-size: 12px; }
.xt-path-settings, .xt-progress-details { margin-top: 22px; border-top: 1px solid var(--line); }
.xt-path-settings > summary, .xt-progress-details > summary { padding: 15px 0; cursor: pointer; font-size: 14px; font-weight: 650; }
.xt-root .xt-path-settings .xt-path-form { margin-bottom: 0; }
.xt-root .xt-empty + .xt-button { margin-top: 14px; }
.teacher-profile-tools:not(:has(> :not(.hidden))) { display: none; }
#teacherProgressRoot:not(:empty) { margin-bottom: 28px; }
@media (min-width: 1100px) {
  #teacherRoot { max-width: 980px; margin-inline: auto; }
}