/* IZI Class — giao diện học sinh (index.html?hoc-sinh) */
.stu-mode .sidebar-bottom, .stu-mode .workspace .chevron, .stu-mode body > .nav-label { display: none; }
.stu-mode.stu-guest #mainNav, .stu-mode.stu-guest .sidebar > .nav-label { display: none; }
.stu-mode #assignFlashcardSet, .stu-mode #pickVocabSet, .stu-mode #vocabClassFilter, .stu-mode [data-vocab-action="assign"] { display: none !important; }
.stu-mode .top-actions { gap: 12px; }
.stu-mode .top-user { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.stu-page { display: grid; gap: 18px; color: var(--ink); min-width: 0; }
.stu-page h2 { margin: 0; font-size: 20px; }
.stu-muted { color: var(--muted); margin: 4px 0 8px; }
.stu-panel { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 18px; box-shadow: var(--shadow); min-width: 0; }
.stu-panel h3 { margin: 0 0 10px; font-size: 16px; }
.stu-panel-head { display: flex; justify-content: space-between; gap: 10px; align-items: flex-start; margin-bottom: 12px; }
.stu-panel-head > div { display: grid; gap: 2px; }
.stu-panel-head small { color: var(--muted); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; flex: none; }
.dot.todo { background: #3a6df0; } .dot.doing { background: #f2a33a; } .dot.fail { background: #d9453b; } .dot.done { background: #5cc98a; } .dot.expired { background: #8a8f99; }
.dot.again { background: #e16b72; } .dot.unsure { background: #f2a33a; } .dot.soon { background: #4e7bf5; } .dot.later { background: #20a879; }

/* đăng nhập */
.stu-login { min-height: calc(100vh - 140px); display: grid; place-items: center; }
.stu-login-card { width: min(420px, 100%); background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 28px; display: grid; gap: 12px; box-shadow: var(--shadow); text-align: center; }
.stu-login-card .brand-mark { margin: 0 auto; }
.stu-login-card h1 { margin: 0; font-size: 24px; }
.stu-login-card p { margin: 0; color: #47506a; }
.stu-or { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 13px; }
.stu-or::before, .stu-or::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.stu-demo { display: grid; gap: 6px; text-align: left; font-weight: 600; font-size: 13px; }
.stu-demo select { height: 42px; border: 1px solid var(--line); border-radius: 10px; padding: 0 10px; background: #fff; }

/* Tổng quan */
.stu-hello { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px; box-shadow: var(--shadow); }
.stu-hello h1 { margin: 0 0 6px; font-size: 26px; color: var(--blue); }
.stu-hello p { margin: 0; color: #47506a; }
.stu-streak { display: grid; gap: 10px; justify-items: end; }
.stu-streak-top { display: flex; align-items: center; gap: 12px; text-align: right; }
.stu-streak-top b { display: block; font-size: 16px; }
.stu-streak-top small { color: var(--muted); font-size: 12px; }
.stu-fire { width: 44px; height: 44px; border-radius: 10px; background: var(--blue); display: grid; place-items: center; font-size: 22px; }
.stu-week { list-style: none; margin: 0; padding: 0; display: flex; gap: 6px; }
.stu-week li { width: 38px; height: 26px; border-radius: 13px; background: var(--pale); color: #5c6b8a; font-size: 12px; display: grid; place-items: center; }
.stu-week li.on { background: var(--blue); color: #fff; }
.stu-week li.today { outline: 2px solid var(--blue); outline-offset: 1px; }
.stu-title-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.stu-title-row h2 { font-size: 22px; }
.stu-range { display: flex; gap: 10px; flex-wrap: wrap; }
.stu-range input { height: 42px; border: 1px solid var(--line); border-radius: 10px; padding: 0 12px; background: #fff; color: var(--ink); }
.stu-due-card { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 190px; gap: 16px; align-items: center; background: linear-gradient(115deg, #eef3ff, #e3ecff); border-radius: 18px; padding: 20px 22px; overflow: hidden; }
.stu-due-lists h3 { margin: 0 0 8px; font-size: 17px; }
.stu-due-lists h3.red { color: #d9453b; margin-top: 16px; }
.stu-due-lists ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.stu-due-item { width: 100%; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; text-align: left; background: rgba(255, 255, 255, .85); border: 1px solid #d8e2fa; border-radius: 12px; padding: 10px 14px; color: var(--ink); }
.stu-due-item:hover { border-color: var(--blue); }
.stu-due-item b { flex: 1 1 200px; }
.stu-due-item > span:not(.stu-due) { color: var(--muted); font-size: 12px; }
.stu-sun { justify-self: center; width: 160px; height: 160px; border: 0; border-radius: 50%; background: radial-gradient(circle at 40% 35%, #ffe57a, #ffc21a 70%); box-shadow: 0 0 0 12px rgba(255, 205, 60, .28), 0 0 0 26px rgba(255, 205, 60, .14); color: #3465e8; font-weight: 800; font-size: 17px; padding: 20px; transition: transform .15s; }
.stu-sun:hover { transform: scale(1.04); }
.stu-sun:focus-visible { outline: 3px solid var(--blue); outline-offset: 30px; }
.stu-vocab { display: grid; gap: 14px; }
.stu-tabs { display: flex; gap: 6px; background: #f0f3f9; border-radius: 12px; padding: 4px; justify-self: start; }
.stu-tabs button { border: 0; background: none; border-radius: 9px; padding: 8px 14px; font-weight: 600; color: #47506a; }
.stu-tabs button.active { background: var(--blue); color: #fff; }
.stu-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.stu-stat { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; display: grid; gap: 6px; }
.stu-stat span { font-weight: 600; font-size: 13px; }
.stu-stat b { font-size: 26px; color: var(--blue); }
.stu-stat.remembered b, .stu-stat.mastered b { color: var(--green); }
.stu-stat.again b { color: #d9453b; } .stu-stat.unsure b { color: #e08a00; }
.stu-vocab-row { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 12px; }
.stu-session { display: flex; gap: 16px; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.stu-session > div:first-child { flex: 1 1 260px; }
.stu-session small { color: var(--muted); font-weight: 700; letter-spacing: .04em; font-size: 11px; }
.stu-session h3 { margin: 6px 0; font-size: 20px; }
.stu-session p { margin: 0; color: #6b7489; font-size: 13px; line-height: 1.5; }
.stu-session-btns { display: grid; gap: 10px; flex: 0 0 170px; }
.stu-session-btns .btn { min-height: 42px; }
.stu-srs ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.stu-srs li { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.stu-srs li b { margin-left: auto; }
.stu-bottom { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.stu-empty { display: grid; justify-items: center; gap: 6px; text-align: center; padding: 26px 10px; color: #6b7489; }
.stu-empty span { font-size: 28px; }
.stu-empty b { color: var(--ink); }
.stu-sched-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.stu-sched-list li { display: flex; gap: 12px; align-items: center; background: #f6f8fc; border-radius: 12px; padding: 10px 12px; }
.stu-sched-list li > b { color: var(--blue); min-width: 52px; }
.stu-sched-list li div { display: grid; gap: 2px; } .stu-sched-list small { color: var(--muted); }
.stu-rank table, .stu-sum-table { width: 100%; border-collapse: collapse; }
.stu-rank th, .stu-sum-table th { text-align: left; font-size: 11px; color: var(--muted); font-weight: 700; padding: 8px 6px; border-bottom: 1px solid var(--line); }
.stu-rank td, .stu-sum-table td { padding: 10px 6px; border-bottom: 1px solid var(--line); }
.stu-rank .num, .stu-sum-table .num { text-align: right; }
.stu-rank tr.me td { background: #eef3ff; }
.stu-rank small { color: var(--muted); }

/* Lớp học */
.stu-progress-card { background: linear-gradient(115deg, #eef3ff, #e1eaff); border-radius: 18px; padding: 18px 22px 20px; display: grid; gap: 14px; }
.stu-search { display: flex; align-items: center; gap: 8px; background: #fff; border: 1px solid #d8e2fa; border-radius: 10px; padding: 0 12px; height: 42px; }
.stu-search input { border: 0; outline: none; flex: 1; min-width: 0; background: none; }
.stu-search:focus-within { border-color: var(--blue); }
.stu-progress-card h1 { margin: 4px 0 0; font-size: 28px; }
.stu-bar { display: flex; height: 22px; border-radius: 11px; overflow: hidden; background: #dfe6f5; max-width: 560px; }
.stu-bar i { display: grid; place-items: center; color: #fff; font-style: normal; font-size: 11px; font-weight: 700; min-width: 0; }
.stu-bar i.todo { background: #3a6df0; } .stu-bar i.doing { background: #f2a33a; } .stu-bar i.fail { background: #d9453b; } .stu-bar i.done { background: #5cc98a; } .stu-bar i.expired { background: #8a8f99; }
.stu-bar i.empty { color: #6b7489; }
.stu-legend { display: flex; flex-wrap: wrap; gap: 8px; }
.stu-legend button { display: inline-flex; align-items: center; gap: 6px; border: 1px solid transparent; background: none; border-radius: 16px; padding: 4px 10px; font-size: 13px; color: var(--ink); }
.stu-legend button.active, .stu-legend button:hover { background: #fff; border-color: #cfdaf5; }
.stu-warn { margin: 0; background: #fff4e5; color: #b54708; border-radius: 12px; padding: 10px 14px; }
.stu-list-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.stu-filters { display: flex; gap: 10px; flex-wrap: wrap; }
.stu-filters label { display: flex; align-items: center; gap: 6px; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 0 10px; height: 40px; font-size: 13px; }
.stu-filters select { border: 0; background: none; font-weight: 600; color: var(--ink); outline: none; }
.stu-sec { margin-top: 8px !important; }
.stu-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.stu-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 16px; display: grid; gap: 10px; align-content: start; box-shadow: var(--shadow); min-width: 0; }
.stu-card-top { display: flex; align-items: flex-start; gap: 8px; flex-wrap: wrap; }
.stu-card-top > b, .stu-card-top > div { flex: 1 1 150px; min-width: 0; overflow-wrap: anywhere; }
.stu-card-top > div { display: grid; gap: 2px; }
.stu-card-top small { color: var(--muted); }
.stu-chip { border-radius: 8px; padding: 3px 9px; font-size: 12px; font-weight: 700; color: #fff; white-space: nowrap; }
.stu-chip.todo { background: #3a6df0; } .stu-chip.doing { background: #f2a33a; } .stu-chip.fail { background: #d9453b; } .stu-chip.done { background: #3fb072; } .stu-chip.expired { background: #8a8f99; }
.stu-card-meta { display: flex; flex-wrap: wrap; gap: 6px 14px; color: #47506a; font-size: 13px; }
.stu-card-tags { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.stu-tag { background: #e9edf6; color: #34415a; border-radius: 6px; padding: 3px 8px; font-size: 11px; font-weight: 700; text-transform: uppercase; }
.stu-due { border-radius: 8px; padding: 3px 9px; font-size: 12px; font-weight: 700; background: #e8eefc; color: #3465e8; white-space: nowrap; }
.stu-due.soon { background: #fff1db; color: #b56a00; }
.stu-due.over { background: #d9453b; color: #fff; }
.stu-due.none { background: #f0f2f6; color: #6b7489; }
.stu-card-btn { border: 0; border-radius: 10px; min-height: 40px; color: #fff; font-weight: 700; padding: 0 14px; }
.stu-card-btn.green { background: #4cc085; } .stu-card-btn.blue { background: var(--blue); }
.stu-card-btn:hover { filter: brightness(1.05); }
.stu-card-btn:disabled { opacity: .5; cursor: not-allowed; }
.stu-flash { background: linear-gradient(135deg, #f1fbf6, #eef6ff); }
.stu-more { border: 0; background: none; font-size: 18px; line-height: 1; color: #6b7489; padding: 2px 6px; border-radius: 6px; }
.stu-more:hover { background: rgba(0, 0, 0, .05); }
.stu-fprog { display: grid; gap: 4px; font-size: 12px; font-weight: 700; color: #47506a; }
.stu-fprog div { height: 6px; background: #dfe6f0; border-radius: 3px; overflow: hidden; }
.stu-fprog i { display: block; height: 100%; background: #4cc085; }
.stu-flash-foot { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.stu-flash-foot small { color: #6b7489; flex: 1 1 100%; }
.stu-flash-foot .stu-card-btn { margin-left: auto; }

/* Kho từ vựng: 4 mức tự đánh giá */
.stu-rate { display: flex; flex-wrap: wrap; gap: 8px; align-items: stretch; margin-top: 12px; }
.stu-rate > span { flex: 1 1 100%; font-weight: 600; font-size: 13px; }
.stu-rate > span em { font-style: normal; color: var(--blue); margin-left: 6px; }
.stu-rate-btn { flex: 1 1 120px; border: 1.5px solid var(--line); background: #fff; border-radius: 10px; padding: 8px 10px; font-weight: 700; display: grid; gap: 2px; text-align: center; }
.stu-rate-btn small { font-weight: 400; color: var(--muted); font-size: 11px; }
.stu-rate-btn.again { color: #d9453b; } .stu-rate-btn.unsure { color: #c77700; } .stu-rate-btn.remembered { color: #3465e8; } .stu-rate-btn.mastered { color: #16895a; }
.stu-rate-btn:hover, .stu-rate-btn.current { border-color: currentColor; background: #fafbff; }

/* nút quay lại trong trang làm bài */
.stu-back { margin-left: auto; border: 1px solid #d6dce8; background: #fff; color: #17233d; border-radius: 8px; padding: 6px 12px; font-weight: 600; font-size: 13px; }
.tp-top .stu-back { margin-left: 8px; }

@media (max-width: 1000px) {
  .stu-vocab-row, .stu-bottom { grid-template-columns: 1fr; }
  .stu-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .stu-due-card { grid-template-columns: 1fr; }
  .stu-sun { width: 130px; height: 130px; font-size: 15px; }
  .stu-hello h1 { font-size: 21px; }
  .stu-streak { justify-items: start; }
  .stu-week li { width: 34px; }
  .stu-session-btns { flex: 1 1 100%; }
  .stu-range input { width: 100%; }
  .stu-range label { flex: 1 1 140px; }
}

/* Mỗi mục chỉ hiện 3 bài hạn gần nhất + nút xem tất cả */
.stu-sec-title { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.stu-sec-title h2 { margin: 0; }
.stu-more { border: 1px solid #c9d6f5; background: #fff; color: #3a5bd9; border-radius: 999px; padding: 5px 14px; font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; }
.stu-more:hover { background: #eef3ff; }
.stu-more:focus-visible { outline: 2px solid #3a5bd9; outline-offset: 2px; }

/* Flashcard được giao: hạn nộp và kết quả lần 1 */
.stu-deadline-note { margin: 4px 0 8px; }
.stu-badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 8px; background: #eef2ff; color: #3a5bd9; line-height: 1.4; }
.stu-badge.ok { background: #e8f8ef; color: #127a4c; }
.stu-badge.late { background: #fff1ef; color: #a3341b; }
.stu-flash-btns { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.stu-flash-btns .stu-card-btn { flex: 1 1 140px; }
.stu-card-btn.blue { background: #3a5bd9; color: #fff; border-color: transparent; }
.stu-card-btn.gray { background: #6b7489; }

/* Thông báo folder từ vựng được giao */
.stu-share-modal { width: min(560px, calc(100vw - 32px)); max-height: calc(100vh - 40px); overflow: auto; }
.stu-share-list { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 10px; }
.stu-share-list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 12px 14px; border: 1px solid #e3e8f4; border-radius: 12px; }
.stu-share-list li.new { background: #f2f7ff; border-color: #c9d6f5; }
.stu-share-list b { font-size: 15px; }
.stu-share-list small { display: block; color: #6b7489; font-size: 12px; margin-top: 2px; }
.stu-new { margin-left: 8px; font-style: normal; font-size: 11px; font-weight: 700; background: #3a5bd9; color: #fff; padding: 2px 8px; border-radius: 99px; }
/* Học sinh chỉ học, không quản lý Kho từ vựng */
.stu-mode #addVocabWord, .stu-mode #createVocabFolder, .stu-mode #createVocabSet, .stu-mode #createVocabSetInline, .stu-mode #deckDetailMenu, .stu-mode #selectVocabDecks, .stu-mode #deleteSelectedDecks, .stu-mode #moveSelectedDecks, .stu-mode #cancelVocabSelection, .stu-mode [data-add-child], .stu-mode [data-deck-menu], .stu-mode [data-folder-menu], .stu-mode #exportVocab, .stu-mode #vocabGuide { display: none !important; }

/* Learn bắt buộc + Luyện tập */
.stu-rate-btn.known { border-color: #8fd3b0; } .stu-rate-btn.easy { border-color: #9db8f5; } .stu-rate-btn.hard { border-color: #f1b27d; }
.stu-rate-btn.current { outline: 2px solid #3a5bd9; outline-offset: 1px; }
.stu-verified { padding: 8px 14px; border-radius: 10px; background: #e8f8ef; color: #127a4c; font-weight: 600; }
.stu-learn-foot { flex-basis: 100%; display: flex; justify-content: center; margin-top: 8px; }
.stu-practice { max-width: 760px; margin: 0 auto; }
.stu-pr-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.stu-pr-head h1 { margin: 0; font-size: 22px; } .stu-pr-head small { color: #6b7489; }
.stu-pr-bar { display: grid; gap: 6px; margin: 8px 0 10px; font-size: 13px; color: #47506a; }
.stu-pr-meter { height: 8px; border-radius: 99px; background: #e5eaf5; overflow: hidden; } .stu-pr-meter i { display: block; height: 100%; background: #22b573; border-radius: 99px; transition: width .3s; }
.stu-pr-card { background: #fff; border: 1px solid #e3e8f4; border-radius: 18px; padding: 24px 26px; display: grid; gap: 12px; box-shadow: 0 4px 18px rgba(23, 35, 61, .06); }
.stu-pr-card.center { text-align: center; justify-items: center; }
.stu-pr-type { justify-self: start; font-size: 12px; font-weight: 700; color: #3a5bd9; background: #eef2ff; padding: 4px 12px; border-radius: 99px; }
.stu-pr-term { font-size: 38px; font-weight: 800; text-align: center; color: #17233d; } .stu-pr-sub { text-align: center; color: #6b7489; margin-top: -6px; }
.stu-pr-ask { text-align: center; margin: 4px 0; color: #47506a; }
.stu-pr-def { font-size: 20px; line-height: 1.5; margin: 0; color: #17233d; } .stu-pr-vi { font-size: 17px; margin: 0; color: #34435a; font-weight: 600; }
.stu-pr-ex { font-size: 20px; line-height: 1.6; margin: 0; } .stu-pr-blank { display: inline-block; min-width: 90px; border-bottom: 2px solid #3a5bd9; text-align: center; color: #3a5bd9; font-weight: 700; }
.stu-pr-hint { margin: 0; color: #6b7489; font-size: 14px; line-height: 1.5; }
.stu-pr-form { display: flex; gap: 10px; flex-wrap: wrap; }
.stu-pr-form input { flex: 1 1 240px; height: 48px; border: 1.5px solid #d6dfef; border-radius: 12px; padding: 0 14px; font: inherit; font-size: 18px; }
.stu-pr-form input:focus { outline: 2px solid #3a5bd9; outline-offset: 1px; border-color: transparent; }
.stu-pr-form .btn { height: 48px; padding: 0 22px; }
.stu-pr-opts { display: grid; gap: 10px; }
.stu-pr-opt { text-align: left; padding: 12px 16px; border: 1.5px solid #d6dfef; border-radius: 12px; background: #fff; font: inherit; cursor: pointer; display: grid; gap: 2px; }
.stu-pr-opt small { color: #6b7489; } .stu-pr-opt:hover:not(:disabled) { border-color: #3a5bd9; background: #f6f9ff; }
.stu-pr-opt.right { border-color: #22b573; background: #e8f8ef; } .stu-pr-opt.wrong { border-color: #d64545; background: #fff1ef; }
.stu-pr-fb { padding: 12px 14px; border-radius: 12px; line-height: 1.5; } .stu-pr-fb.ok { background: #e8f8ef; color: #127a4c; } .stu-pr-fb.bad { background: #fff1ef; color: #8a2b17; }
.stu-pr-warn { margin-top: 6px; font-weight: 700; color: #a3341b; }
@media (max-width: 640px) { .stu-pr-card { padding: 18px; } .stu-pr-term { font-size: 30px; } }
.stu-learn-foot .btn:disabled { opacity: .5; cursor: not-allowed; }
.cls-modal{max-width:860px;width:calc(100vw - 32px)}.cls-loading{padding:24px;text-align:center}.cls-result{margin:12px 0}
.vl-card{background:#fff;border:1px solid #e3e6ee;border-radius:18px;padding:20px 22px;margin:12px 0}.vl-card h3{margin:0 0 14px;font-size:20px}.vl-sub{margin:0;color:#6b7280}.vl-total{margin:2px 0 14px;display:flex;align-items:baseline;gap:6px}.vl-total b{font-size:40px;line-height:1}.vl-total span{font-size:22px;color:#6b7280}
.vl-chart{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;align-items:end}.vl-col{display:flex;flex-direction:column;align-items:center;gap:4px}.vl-n{font-size:13px;font-weight:600;color:#4b5563}.vl-barwrap{height:150px;width:100%;display:flex;align-items:flex-end;border-bottom:1px solid #eceef3}.vl-barwrap i{display:block;width:100%;border-radius:8px 8px 3px 3px}.vl-col small{font-size:13px;color:#4b5563}
.stu-vocab-row{grid-template-columns:1fr}
@media(max-width:600px){.vl-barwrap{height:110px}.vl-total b{font-size:32px}}
.vl-note{margin:0 0 14px;color:#6b7280;font-size:13px}
.vl-assigned{padding:14px 18px}.vl-assigned h3{font-size:17px;margin-bottom:8px}.vl-item{border-top:1px solid #eceef3;padding:8px 0}.vl-item summary,.vl-item.flat{display:flex;justify-content:space-between;gap:12px;align-items:center;cursor:pointer;list-style:none}.vl-item small{display:block;color:#6b7280;font-size:12px}
.vl-item ul{list-style:none;margin:6px 0 0;padding:0 0 0 14px}.vl-item li{display:flex;justify-content:space-between;gap:12px;padding:3px 0;font-size:13px}.vl-prog{display:flex;align-items:center;gap:8px;white-space:nowrap}.vl-pbar{display:inline-block;width:80px;height:6px;border-radius:4px;background:#e5e8f0;overflow:hidden}.vl-pbar i{display:block;height:100%;background:#4650e0}
.vs-prog{margin-top:4px}.vs-prog summary{cursor:pointer;color:#3a5bd9;font-size:12px}.vs-prog-table{width:100%;border-collapse:collapse;margin-top:6px;font-size:13px}.vs-prog-table th,.vs-prog-table td{text-align:left;padding:4px 6px;border-bottom:1px solid #eceef3}
.stu-flash-note{margin:4px 0 10px;font-size:13px}