:root{--bg:#f5f7fb;--card:#fff;--text:#162033;--muted:#667085;--line:#d9e0eb;--accent:#5b2c6f;--accent2:#7d3c98;--good:#0f766e;--warn:#a16207;--bad:#b42318;--green:#15803d;--blue:#1d4ed8}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}.wrap{max-width:1050px;margin:24px auto;padding:0 16px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:0 6px 20px rgba(16,24,40,.05);margin-bottom:16px}h1{font-size:28px;margin:0 0 6px}h2{font-size:21px;margin:0 0 14px}h3{margin:0 0 10px}.sub,.muted{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}.pill{display:inline-block;border-radius:999px;padding:5px 10px;background:#eee7f1;color:var(--accent);font-weight:700;font-size:13px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}button,.btn{border:0;border-radius:10px;padding:11px 16px;font-weight:700;cursor:pointer;background:var(--accent);color:white;text-decoration:none;display:inline-block}button.secondary,.btn.secondary{background:#eef2f7;color:#27364b;border:1px solid var(--line)}button.good{background:var(--good)}button.bad{background:var(--bad)}button:disabled{opacity:.55;cursor:not-allowed}select,input,textarea{border:1px solid #cfd8e6;border-radius:9px;padding:10px 11px;font-size:15px;background:white;color:var(--text)}input[type=text]{width:100%}.hidden{display:none!important}.item{border:1px solid var(--line);border-radius:12px;padding:14px;margin:10px 0;background:#fbfcfe}.vn{font-size:20px;font-weight:700;margin-bottom:5px}.en{font-size:18px;color:var(--accent);font-weight:700}.ipa{font-size:14px;color:var(--muted);margin-top:4px}.tag{font-size:12px;color:var(--muted);text-transform:uppercase}.tts{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:10px}.tts button{padding:8px 11px}.test-row{display:grid;grid-template-columns:52px 1fr 1.2fr;gap:10px;align-items:center;border-bottom:1px solid #edf0f4;padding:11px 0}.num{font-weight:800;color:var(--accent)}.msg{padding:11px 13px;border-radius:10px;background:#f2f4f7;margin-top:12px;white-space:pre-wrap}.msg.ok{background:#ecfdf3;color:#067647}.msg.err{background:#fef3f2;color:#b42318}.resultBlue{color:var(--blue);font-weight:800}.resultGreen{color:var(--green);font-weight:800}.resultRed{color:var(--bad);font-weight:800}table{width:100%;border-collapse:collapse}th,td{border-bottom:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}th{background:#f7f4f9}.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px}.kpi{border:1px solid var(--line);border-radius:12px;padding:12px;background:#fbfcfe}.kpi b{display:block;font-size:23px;margin-top:4px}.statusbar{font-weight:700;margin:8px 0}.bigword{text-align:center;font-size:34px;font-weight:800;padding:28px 10px;color:var(--accent)}.timer{text-align:center;font-size:28px;font-weight:800}.info-grid{display:grid;grid-template-columns:170px 1fr;gap:8px 12px}.info-grid b{color:var(--muted)}@media(max-width:720px){h1{font-size:24px}.test-row{grid-template-columns:42px 1fr}.test-row input{grid-column:2}.info-grid{grid-template-columns:1fr}.bigword{font-size:28px}}
.resultYellow{color:#a16207;font-weight:800}.yellow{background:#ca8a04;color:#fff}.yellowKpi{background:#fffbea;border-color:#fde68a}.stateLegend{display:flex;gap:8px;flex-wrap:wrap}.stateLegend span{padding:5px 9px;border-radius:999px;font-size:13px;font-weight:700}.stateRed{background:#fef3f2;color:#b42318}.stateYellow{background:#fff7d6;color:#a16207}.stateBlue{background:#eff6ff;color:#1d4ed8}.stateGreen{background:#ecfdf3;color:#15803d}

button.danger{background:var(--bad)}

.tts-settings{justify-content:flex-end}.tts-settings label{font-size:13px;font-weight:700;color:var(--muted)}.tts-settings select{min-width:118px}@media(max-width:720px){.tts-settings{justify-content:flex-start;width:100%;margin-top:8px}.tts-settings select{min-width:128px}}
.speech-result{
  margin-top:12px;
  padding:12px;
  border-radius:10px;
  font-weight:800;
  text-align:center;
  font-size:18px;
}
.speech-result.blue{
  background:#eff6ff;
  color:#1d4ed8;
}
.speech-result.yellow{
  background:#fff7d6;
  color:#a16207;
}
.speech-result.listening{
  background:#ecfdf3;
  color:#067647;
}
/* IEC V4.1 unified portal */
.portal-shell{max-width:1180px;margin:0 auto;padding:16px}.portal-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:12px}.portal-header h1{margin:0}.portal-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 14px}.portal-tabs button{background:#eef2f7;color:#27364b;border:1px solid var(--line)}.portal-tabs button.active,.practiceTab.active{background:var(--accent);color:#fff}.portal-tabs.compact{margin:8px 0}.portal-frame{width:100%;height:calc(100vh - 190px);min-height:660px;border:0;background:#fff;border-radius:12px}.portal-info{margin-top:18px}.table-scroll{overflow:auto}.memory-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:center;border-bottom:1px solid var(--line);padding:10px 0}.memory-answer{grid-column:1/-1;padding:8px 10px;background:#f7f9fc;border-radius:8px;font-weight:700;color:var(--accent)}.practicePanel{margin-top:10px}.meaningChoice{margin:4px}.yellow{background:#ca8a04!important;color:#fff!important}.good{background:#15803d!important}.danger{background:#b42318!important}
@media(max-width:720px){.portal-shell{padding:8px}.portal-frame{height:calc(100vh - 150px);min-height:600px}.portal-tabs{position:sticky;top:0;background:#fff;padding:7px 0;z-index:10}.portal-tabs button{flex:1;min-width:42%}.memory-row{grid-template-columns:1fr}}

.exam-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:16px}.exam-grid button{min-height:120px;text-align:left;display:flex;flex-direction:column;gap:8px;justify-content:center}.exam-grid button b{font-size:18px}.exam-grid button span{font-weight:500;line-height:1.35}@media(max-width:720px){.exam-grid{grid-template-columns:1fr}}


/* ============================================================
   IEC V4.1 CLEAN UI / PERFORMANCE PASS – 2026-10-06
   ============================================================ */
.msg:empty{display:none}
.app-footer{
  text-align:center;
  color:#98a2b3;
  font-size:12px;
  padding:12px 0 18px;
}
.section-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
}
.practice-block{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.practice-block h3{
  margin-bottom:8px;
  font-size:17px;
}
#dictationInput{
  margin:10px 0;
}
#dictationCheck{
  margin-bottom:4px;
}
.stateLegend{
  justify-content:flex-end;
}
.stateLegend span{
  white-space:nowrap;
}
.portal-header .sub{
  margin-top:3px;
}
.exam-grid button{
  transition:transform .12s ease,box-shadow .12s ease;
}
.exam-grid button:hover{
  transform:translateY(-1px);
  box-shadow:0 6px 16px rgba(16,24,40,.10);
}
.portal-frame{
  background:var(--bg);
}
#newCard .item,#repairPracticeCard .item{
  background:#fff;
}
.statusbar{
  line-height:1.45;
}
.card>.sub{
  line-height:1.45;
}
@media(max-width:720px){
  .stateLegend{
    justify-content:flex-start;
  }
  .stateLegend span{
    white-space:normal;
  }
  .card{
    padding:16px;
  }
  button,.btn{
    min-height:42px;
  }
  .tts-settings{
    gap:7px;
  }
}


/* IEC V4.1 grouped practice UI – 2026-10-06 */
button,input,select,textarea{font-family:inherit}
button b,button span{font-family:inherit}
.practice-header-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:10px}
.practice-level{display:grid;gap:10px;margin-top:14px}
.practice-level-parent{grid-template-columns:repeat(2,minmax(0,1fr))}
.practice-level-child{grid-template-columns:repeat(2,minmax(0,1fr));padding:12px;background:#f7f9fc;border:1px solid var(--line);border-radius:12px}
.practice-level button{min-height:52px;font-size:15px}
.practice-level-parent button{font-size:17px}
.practice-level button.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.practice-free-note{margin-top:12px;padding:9px 11px;border-radius:10px;background:#f2f4f7;color:var(--muted);font-size:13px}
.practice-progress{min-width:64px;text-align:center;border-radius:999px;background:#eee7f1;color:var(--accent);font-weight:800;padding:7px 11px}
.practice-player{margin-top:14px;border:1px solid var(--line);border-radius:14px;padding:18px;background:#fbfcfe;min-height:142px}
.practice-player .vn{font-size:22px}
.practice-player .en{font-size:20px}
.practice-player-controls{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px;margin-top:14px}
.practice-player-controls button{padding:10px 8px;white-space:nowrap}
.practice-speak-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:12px}
.practiceResult{font-weight:700;line-height:1.4}
.practice-action-row{margin:12px 0 8px}
.practice-write-prompt{padding:20px 8px;text-align:left;font-size:28px}
#vietwriteInput,#dictationInput{margin:10px 0}
#dictationCheck{margin-bottom:4px}
@media(max-width:720px){
  .practice-level-parent,.practice-level-child{grid-template-columns:1fr 1fr}
  .practice-level button{min-height:48px;padding:10px 8px}
  .practice-player-controls{grid-template-columns:repeat(3,minmax(0,1fr))}
  .practice-player-controls button{font-size:13px}
  .practice-header-actions{align-items:flex-start}
  .practice-header-actions .tts-settings{width:100%}
  .practice-write-prompt{font-size:24px}
}
@media(max-width:430px){
  .practice-level-parent,.practice-level-child{grid-template-columns:1fr}
  .practice-player-controls{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ============================================================
   IEC V4.1 RELEASE CANDIDATE UI – 2026-10-06
   Typography, hierarchy, dashboard and results
   ============================================================ */
html,body,button,input,select,textarea,table,th,td{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
body{font-size:16px;line-height:1.48;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
button,input,select,textarea{line-height:1.3}
h1,h2,h3,b,strong,button{letter-spacing:0}
h1{font-size:30px;font-weight:700;line-height:1.18}
h2{font-size:22px;font-weight:700;line-height:1.25}
h3{font-size:18px;font-weight:700;line-height:1.3}
.sub,.muted{font-size:15px;line-height:1.48}
.bigword{font-size:32px;font-weight:700;line-height:1.25}
.vn{font-weight:700}.en{font-weight:700}
input,select,textarea{font-size:16px}
button,.btn{font-size:15px;font-weight:650}

/* Tiêu đề + mô tả cấp card căn giữa; dữ liệu thao tác/bảng vẫn căn trái. */
.card>h1,.card>h2,.card>.sub,.card>.muted,.page-intro>h2,.page-intro>.sub,
.section-head>div:first-child>h2,.section-head>div:first-child>.muted,
#pageTitle,#pageRule,#meta,.centered-status{text-align:center}
.section-head>div:first-child{flex:1;min-width:240px}
.section-head{align-items:center}

.portal-header{align-items:center}.portal-brand{min-width:210px}.portal-header h1{font-size:31px;font-weight:700}.portal-header .sub{font-size:15px}
.portal-tabs{justify-content:flex-start}.portal-tabs button{font-size:15px;min-width:112px;text-align:center}
.stateLegend{align-items:center}
.stateLegend span{font-size:13px;font-weight:650}

/* Practice hierarchy */
.practice-breadcrumb,.exam-breadcrumb{
  margin:12px auto 2px;text-align:center;color:var(--accent);font-size:13px;font-weight:700;letter-spacing:.01em
}
.practice-level-parent{gap:12px}
.practice-level-parent button{
  min-height:62px;font-size:18px;border-radius:13px;box-shadow:0 2px 7px rgba(16,24,40,.04)
}
.practice-level-child{
  width:min(82%,760px);margin:12px auto 0;grid-template-columns:repeat(2,minmax(0,1fr));padding:10px;border-radius:13px
}
.practice-level-child button{min-height:44px;font-size:14px;padding:9px 12px}
.practice-free-note{text-align:center}
.practice-header-actions{justify-content:center}
.practice-settings-slot{margin:12px 0 4px;min-height:42px}
.practice-inline-settings{justify-content:center;width:100%;padding:8px 10px;border-radius:12px;background:#f7f9fc;border:1px solid var(--line)}
.practice-inline-settings label{font-size:14px}.practice-inline-settings select{font-size:15px;min-width:130px}
.practice-progress{font-size:16px;font-weight:700}
.practice-player .vn{font-size:23px;font-weight:700;line-height:1.25}
.practice-player .en{font-size:20px;font-weight:650;line-height:1.3}
.practice-player .ipa{font-size:15px}
.practice-write-prompt{font-size:30px;font-weight:700;line-height:1.28;padding:24px 8px}
#vietwriteInput{min-height:54px;font-size:20px;padding:12px 14px}
#dictationInput{min-height:64px;font-size:22px;padding:14px 16px;margin:14px 0}
#dictationPrompt{font-size:17px;padding:14px 16px;text-align:center}
.dictation-replay-box{display:flex;flex-direction:column;align-items:center;gap:5px}
.dictation-replay-box small{font-size:13px;color:var(--muted);font-weight:600}
#dictationMeaning{margin-top:12px}.meaningChoice{font-size:16px;padding:11px 14px}

/* CA THI hierarchy */
.exam-parent-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.exam-parent-card{min-height:156px!important;text-align:center!important;align-items:center;justify-content:center!important;padding:18px!important}
.exam-parent-card b{font-size:21px!important}.exam-parent-card span{font-size:15px;line-height:1.4}.exam-parent-card em{font-style:normal;font-size:13px;line-height:1.35;color:#fff;font-weight:600;opacity:.95}
.exam-parent-card .mini-progress{width:78%;background:rgba(255,255,255,.22)}.exam-parent-card .mini-progress u{background:#fff}
.exam-child-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;width:min(86%,820px);margin:16px auto 0;padding:10px;border:1px solid var(--line);border-radius:14px;background:#f7f9fc}
.exam-child-nav button{min-height:54px;font-size:14px;padding:9px 12px;text-align:center}
.exam-child-nav button small{display:block;margin-top:4px;font-size:12px;font-weight:600;opacity:.85}
.exam-child-nav button.active{background:var(--accent);color:#fff;border-color:var(--accent)}
#redExamCard>button,#yellowExamCard>button{display:block;margin:14px auto 0}
#writeCard>#writeSubmit{display:block;margin:14px auto 0}

/* Generic progress */
.mini-progress,.big-progress{display:block;overflow:hidden;border-radius:999px;background:#e8edf5;height:9px}
.mini-progress u,.big-progress u{display:block;height:100%;border-radius:inherit;background:var(--accent);text-decoration:none;transition:width .25s ease}
.big-progress{height:13px}

/* THÔNG TIN dashboard */
.dashboard-stack{display:grid;gap:16px}.dashboard-stack>.card{margin:0}
.info-course-card{display:grid;grid-template-columns:180px 1fr;gap:24px;align-items:center}
.course-ring,.mini-donut{--p:0;display:grid;place-items:center;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--p)*1%),#e9edf4 0);position:relative}
.course-ring{width:164px;height:164px;margin:auto}.course-ring:after,.mini-donut:after{content:"";position:absolute;border-radius:50%;background:#fff}.course-ring:after{inset:15px}.course-ring>div,.mini-donut>*{position:relative;z-index:1;text-align:center}.course-ring b{display:block;font-size:28px;color:var(--accent)}.course-ring span{display:block;font-size:13px;color:var(--muted);font-weight:650}
.course-main h2{text-align:left!important;margin-bottom:4px}.course-main>.sub{text-align:left!important}.course-identity{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:16px}.course-identity span{padding:10px 12px;border-radius:11px;background:#f7f9fc;border:1px solid var(--line)}.course-identity b{display:block;font-size:12px;text-transform:uppercase;color:var(--muted);margin-bottom:3px}
.next-action-card{border-left:5px solid var(--accent)}.next-action-text{text-align:center;font-size:18px;font-weight:650;line-height:1.5;color:#27364b}
.state-stack{height:14px;border-radius:999px;overflow:hidden;background:#edf1f6;display:flex;margin:16px 0}.state-stack .seg{display:block;height:100%}.state-stack .red{background:#dc2626}.state-stack .yellow{background:#d4a017}.state-stack .green{background:#16a34a}.state-stack .blue{background:#2563eb}
.status-kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.status-kpi{border-radius:13px;padding:13px;text-align:center;border:1px solid transparent}.status-kpi span{display:block;font-size:13px;font-weight:650;line-height:1.35}.status-kpi b{display:block;font-size:28px;margin-top:5px}.status-kpi.red{background:#fef2f2;color:#b42318;border-color:#fecaca}.status-kpi.yellow{background:#fff9db;color:#9a6700;border-color:#fde68a}.status-kpi.green{background:#ecfdf3;color:#067647;border-color:#bbf7d0}.status-kpi.blue{background:#eff6ff;color:#1d4ed8;border-color:#bfdbfe}
.today-completion{display:flex;justify-content:center;align-items:center;gap:18px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.mini-donut{width:92px;height:92px;flex:0 0 92px}.mini-donut:after{inset:10px}.mini-donut b{font-size:18px;color:var(--accent)}.mini-donut span{display:block;font-size:12px;color:var(--muted)}.today-completion p{margin:4px 0 0;color:var(--muted)}
.session-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.session-card{border:1px solid var(--line);border-radius:14px;padding:15px;text-align:center;background:#fbfcfe}.session-card h3{margin-bottom:5px}.session-sub{font-size:13px;color:var(--muted);min-height:38px}.session-attempt{font-weight:700;margin:9px 0}.session-card .mini-progress{margin:8px 0}.session-status{font-size:13px;font-weight:700;color:var(--accent)}

.midday-session{display:flex;flex-direction:column;gap:7px}.midday-session .session-sub{min-height:0}.midday-attempt-row{padding:8px 10px;border-radius:10px;background:#fff;border:1px solid var(--line)}.midday-attempt-row span{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);margin-bottom:6px}.midday-attempt-row span b{color:#344054;font-size:12px}.midday-attempt-row .mini-progress{margin:0}
.ta-wait-number{text-align:center;font-size:40px;font-weight:750;color:#15803d}.ta-wait-number span{font-size:16px}.ta-wait-card>.sub{text-align:center}
.day-timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;position:relative}.day-timeline:before{content:"";position:absolute;left:10%;right:10%;top:20px;height:2px;background:#d9e0eb}.day-timeline>div{position:relative;text-align:center;padding-top:38px}.day-timeline>div:before{content:"";position:absolute;width:13px;height:13px;border:4px solid #fff;border-radius:50%;background:var(--accent);box-shadow:0 0 0 2px #c7b7d1;top:14px;left:calc(50% - 6px)}.day-timeline b{display:block}.day-timeline span{font-size:13px;color:var(--muted);line-height:1.35}
.class-details summary{cursor:pointer;text-align:center;font-size:18px;font-weight:700;color:var(--accent)}.class-info-grid{display:grid;grid-template-columns:180px 1fr;gap:9px 14px;margin-top:16px}.class-info-grid b{color:var(--muted)}

/* KẾT QUẢ & TIẾN ĐỘ */
.course-result-kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.course-result-kpis>div{padding:13px;border:1px solid var(--line);border-radius:13px;text-align:center;background:#fbfcfe}.course-result-kpis span{display:block;color:var(--muted);font-size:13px}.course-result-kpis b{display:block;font-size:27px;margin-top:3px}
.course-progress-line{margin-top:18px}.course-progress-line>div:first-child{display:flex;justify-content:space-between;gap:12px;margin-bottom:7px}.course-progress-line span{font-weight:650}.course-progress-line b{color:var(--accent)}
.trend-chart{width:100%;overflow:hidden;margin-top:12px}.trend-chart svg{display:block;width:100%;height:auto;min-height:220px}.chart-grid{stroke:#e6eaf0;stroke-width:1}.chart-axis{font-size:12px;fill:#667085}.chart-line{fill:none;stroke-width:4;stroke-linecap:round;stroke-linejoin:round}.line-red{stroke:#dc2626}.line-yellow{stroke:#d4a017}.line-green{stroke:#16a34a}.line-blue{stroke:#2563eb}.chart-legend{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:4px}.chart-legend span{font-size:13px;font-weight:700}.chart-legend .red{color:#dc2626}.chart-legend .yellow{color:#a16207}.chart-legend .green{color:#15803d}.chart-legend .blue{color:#1d4ed8}
.progress-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.progress-notes span{padding:13px;text-align:center;border-radius:12px;background:#f7f9fc;border:1px solid var(--line)}
.result-days{display:grid;gap:9px;margin-top:14px}.result-day{border:1px solid var(--line);border-radius:12px;background:#fbfcfe;overflow:hidden}.result-day summary{cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:13px 15px}.result-day summary div{display:flex;flex-direction:column}.result-day summary span{font-size:13px;color:var(--muted)}.result-day summary strong{color:var(--accent);font-size:18px}.result-day-body{padding:0 15px 15px}.state-mini{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:9px}.state-mini span{padding:4px 8px;border-radius:999px;font-size:12px;font-weight:700}.state-mini .red{background:#fef2f2;color:#b42318}.state-mini .yellow{background:#fff7d6;color:#a16207}.state-mini .green{background:#ecfdf3;color:#15803d}.state-mini .blue{background:#eff6ff;color:#1d4ed8}.history-sessions{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px;color:var(--muted);font-size:13px}
.difficult-list,.review-list{display:grid;gap:9px;margin-top:14px}.difficult-item{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:12px;align-items:center;padding:13px;border:1px solid var(--line);border-radius:12px}.difficult-item.red{border-left:5px solid #dc2626}.difficult-item.yellow{border-left:5px solid #d4a017}.difficult-item b{display:block}.difficult-item span{display:block;color:var(--muted);font-size:13px}.difficult-meta{font-size:13px;color:var(--muted);text-align:right}.button.small,button.small{padding:8px 10px;font-size:13px}
.difficult-toolbar{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:14px}.difficult-toolbar button.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.difficult-word{min-width:0}.difficult-word .difficult-vn{display:block;font-size:19px;line-height:1.32;color:var(--text);font-weight:750}.difficult-word .difficult-en{display:block;margin-top:3px;font-size:14px;line-height:1.35;color:var(--muted);font-weight:600}.difficult-footer{text-align:center;margin-top:14px}.difficult-toggle{min-width:240px}

.review-item{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 12px;padding:13px;border:1px solid var(--line);border-radius:12px}.review-item div span{display:block;color:var(--muted);font-size:12px}.review-item p{grid-column:1/-1;margin:0;color:#475467}

@media(max-width:820px){
  .info-course-card{grid-template-columns:1fr}.course-main h2,.course-main>.sub{text-align:center!important}.course-identity{grid-template-columns:1fr 1fr}
  .status-kpis{grid-template-columns:1fr 1fr}.session-cards{grid-template-columns:1fr}.day-timeline{grid-template-columns:1fr 1fr}.day-timeline:before{display:none}.day-timeline>div{padding:10px 8px 10px 28px;text-align:left;border-left:2px solid #e1e6ee}.day-timeline>div:before{left:-8px;top:15px}.course-result-kpis{grid-template-columns:1fr 1fr}.progress-notes{grid-template-columns:1fr}.difficult-item{grid-template-columns:1fr auto}.difficult-meta{grid-column:1/-1;text-align:left}.exam-parent-grid{grid-template-columns:1fr}
}
@media(max-width:720px){
  h1{font-size:25px}h2{font-size:20px}.bigword{font-size:28px}.portal-brand{width:100%;text-align:center}.stateLegend{justify-content:center}.portal-tabs{justify-content:center}.portal-tabs button{min-width:42%}
  .practice-level-child,.exam-child-nav{width:100%}.practice-inline-settings{gap:8px}.practice-inline-settings label{width:auto}.practice-player .vn{font-size:21px}.practice-write-prompt{font-size:26px}.course-ring{width:146px;height:146px}.course-identity{grid-template-columns:1fr}.class-info-grid{grid-template-columns:1fr}.class-info-grid b{margin-top:5px}.today-completion{align-items:flex-start}.day-timeline{grid-template-columns:1fr}.course-progress-line>div:first-child{flex-direction:column;gap:2px}.difficult-item{grid-template-columns:1fr}.difficult-item button{width:100%}.review-item{grid-template-columns:1fr}
}
@media(max-width:460px){
  .status-kpis,.course-result-kpis{grid-template-columns:1fr}.practice-level-parent,.practice-level-child,.exam-child-nav{grid-template-columns:1fr}.practice-level-parent button{min-height:54px}.today-completion{flex-direction:column;align-items:center;text-align:center}.portal-tabs button{min-width:46%}
}

/* IEC V4.1 TA semantic action color */
button.blueAction{background:#2563eb!important;color:#fff!important}