/* ============================================================
   IELTSBeacon Test Engine — test-engine.css
   Clinical IELTS interface. Navy/Teal brand on outer chrome.
   White/charcoal on active test. Mobile-first.
   ============================================================ */

:root {
    --ibt-navy:        #0B2545;
    --ibt-teal:        #1D9E75;
    --ibt-teal-dark:   #0F6E56;
    --ibt-bg:          #F7F8FA;
    --ibt-surface:     #FFFFFF;
    --ibt-border:      #E2E6EA;
    --ibt-text:        #1A1A1A;
    --ibt-muted:       #6B7280;
    --ibt-accent:      #2B6CB0;
    --ibt-accent-bg:   #EBF4FF;
    --ibt-correct:     #1D9E75;
    --ibt-wrong:       #E24B4A;
    --ibt-warn:        #BA7517;
    --ibt-radius:      8px;
    --ibt-radius-lg:   12px;
}

/* ── loading state ── */
.ibt-loading {
    padding: 40px;
    text-align: center;
    color: var(--ibt-muted);
    font-size: 14px;
}

/* ── test root wrapper ── */
#ibt-test-root,
#ibt-auth-root,
#ibt-dashboard-root {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--ibt-text);
    background: var(--ibt-bg);
    min-height: 500px;
}

/* ============================================================
   TEST HEADER
   ============================================================ */
.ibt-header {
    background: var(--ibt-navy);
    color: #fff;
    padding: 0 20px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.ibt-header-left  { display: flex; align-items: center; gap: 12px; }
.ibt-header-logo  { font-size: 14px; font-weight: 500; opacity: .9; }
.ibt-header-badge {
    background: rgba(255,255,255,.15);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
}
.ibt-header-right { display: flex; align-items: center; gap: 16px; }

/* timer */
.ibt-timer        { display: flex; align-items: center; gap: 6px; font-size: 15px; font-weight: 500; }
.ibt-timer.warn   { color: #FCD34D; }
.ibt-timer.danger { color: #FCA5A5; }

/* submit button */
.ibt-btn-submit {
    background: var(--ibt-teal);
    color: #fff;
    border: none;
    padding: 7px 18px;
    border-radius: var(--ibt-radius);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background .15s;
}
.ibt-btn-submit:hover { background: var(--ibt-teal-dark); }

/* ============================================================
   PASSAGE TABS (Reading)
   ============================================================ */
.ibt-tabs {
    background: var(--ibt-surface);
    border-bottom: 1px solid var(--ibt-border);
    padding: 0 20px;
    display: flex;
    gap: 4px;
}
.ibt-tab {
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    color: var(--ibt-muted);
    transition: all .15s;
    white-space: nowrap;
}
.ibt-tab.active { color: var(--ibt-accent); border-bottom-color: var(--ibt-accent); }
.ibt-tab:hover:not(.active) { color: var(--ibt-text); }

/* ============================================================
   SPLIT LAYOUT — desktop
   ============================================================ */
.ibt-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 520px;
}
.ibt-passage {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    border-right: 1px solid var(--ibt-border);
    background: var(--ibt-surface);
}
.ibt-questions {
    width: 380px;
    flex-shrink: 0;
    overflow-y: auto;
    background: var(--ibt-bg);
}

/* passage text */
.ibt-passage-title  { font-size: 17px; font-weight: 500; margin-bottom: 4px; }
.ibt-passage-source { font-size: 12px; color: var(--ibt-muted); margin-bottom: 16px; }
.ibt-passage-body   { font-size: 14px; line-height: 1.85; color: #2D3748; }
.ibt-passage-body p { margin-bottom: 14px; }

/* ============================================================
   QUESTION GROUPS
   ============================================================ */
.ibt-q-group {
    background: var(--ibt-surface);
    margin: 12px;
    border-radius: var(--ibt-radius);
    border: 1px solid var(--ibt-border);
    overflow: hidden;
}
.ibt-q-group-header {
    padding: 10px 14px;
    background: #F1F5F9;
    border-bottom: 1px solid var(--ibt-border);
    font-size: 12px;
    font-weight: 500;
    color: var(--ibt-muted);
    text-transform: uppercase;
    letter-spacing: .4px;
}
.ibt-q-instruction {
    padding: 8px 14px;
    font-size: 12px;
    color: var(--ibt-text);
    background: #FAFBFC;
    border-bottom: 1px solid var(--ibt-border);
    font-style: italic;
}
.ibt-q-item {
    padding: 12px 14px;
    border-bottom: 1px solid var(--ibt-border);
}
.ibt-q-item:last-child { border-bottom: none; }
.ibt-q-num  { font-size: 12px; font-weight: 500; color: var(--ibt-accent); margin-bottom: 6px; }
.ibt-q-text { font-size: 13px; font-weight: 500; margin-bottom: 8px; line-height: 1.5; }

/* MCQ options */
.ibt-options { display: flex; flex-direction: column; gap: 5px; }
.ibt-opt {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 7px 10px;
    border-radius: var(--ibt-radius);
    border: 1px solid var(--ibt-border);
    cursor: pointer;
    font-size: 13px;
    transition: all .12s;
    background: var(--ibt-surface);
}
.ibt-opt:hover                   { border-color: var(--ibt-accent); background: var(--ibt-accent-bg); }
.ibt-opt.selected                { border-color: var(--ibt-accent); background: var(--ibt-accent-bg); color: var(--ibt-accent); font-weight: 500; }
.ibt-opt.correct                 { border-color: var(--ibt-correct); background: #E6F7F2; color: var(--ibt-correct); }
.ibt-opt.wrong                   { border-color: var(--ibt-wrong);   background: #FEF2F2; color: var(--ibt-wrong); }
.ibt-opt-letter                  { font-weight: 600; min-width: 16px; flex-shrink: 0; }

/* TFNG / YNGG buttons */
.ibt-tfng { display: flex; gap: 6px; }
.ibt-tfng-btn {
    flex: 1;
    padding: 7px 4px;
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    background: var(--ibt-surface);
    color: var(--ibt-muted);
    transition: all .12s;
    text-align: center;
}
.ibt-tfng-btn:hover           { border-color: var(--ibt-accent); color: var(--ibt-accent); }
.ibt-tfng-btn.selected        { border-color: var(--ibt-accent); background: var(--ibt-accent-bg); color: var(--ibt-accent); }
.ibt-tfng-btn.correct         { border-color: var(--ibt-correct); background: #E6F7F2; color: var(--ibt-correct); }
.ibt-tfng-btn.wrong           { border-color: var(--ibt-wrong);   background: #FEF2F2; color: var(--ibt-wrong); }

/* fill input */
.ibt-fill-input {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    font-size: 13px;
    outline: none;
    background: var(--ibt-surface);
    color: var(--ibt-text);
    box-sizing: border-box;
}
.ibt-fill-input:focus   { border-color: var(--ibt-accent); }
.ibt-fill-input.correct { border-color: var(--ibt-correct); background: #E6F7F2; }
.ibt-fill-input.wrong   { border-color: var(--ibt-wrong);   background: #FEF2F2; }

/* explanation */
.ibt-explanation {
    margin-top: 8px;
    padding: 8px 10px;
    background: #FFFBEB;
    border-left: 3px solid #F59E0B;
    border-radius: 0 var(--ibt-radius) var(--ibt-radius) 0;
    font-size: 12px;
    color: #78350F;
    display: none;
}
.ibt-explanation.show { display: block; }

/* ============================================================
   QUESTION NAV STRIP
   ============================================================ */
.ibt-nav {
    background: var(--ibt-surface);
    border-top: 1px solid var(--ibt-border);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.ibt-nav-label { font-size: 12px; color: var(--ibt-muted); margin-right: 4px; white-space: nowrap; }
.ibt-nav-dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid var(--ibt-border);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ibt-surface);
    color: var(--ibt-muted);
    transition: all .12s;
}
.ibt-nav-dot.answered { background: var(--ibt-accent); border-color: var(--ibt-accent); color: #fff; }
.ibt-nav-dot.active   { border: 2px solid var(--ibt-accent); color: var(--ibt-accent); }
.ibt-nav-dot.correct  { background: var(--ibt-correct); border-color: var(--ibt-correct); color: #fff; }
.ibt-nav-dot.wrong    { background: var(--ibt-wrong);   border-color: var(--ibt-wrong);   color: #fff; }

/* ============================================================
   AUDIO PLAYER (Listening)
   ============================================================ */
.ibt-audio-wrap {
    background: var(--ibt-navy);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}
.ibt-audio-wrap audio { flex: 1; height: 36px; accent-color: var(--ibt-teal); }
.ibt-audio-section-label { color: rgba(255,255,255,.8); font-size: 13px; white-space: nowrap; }

/* ============================================================
   GATE SCREEN
   ============================================================ */
.ibt-gate {
    padding: 60px 24px;
    text-align: center;
    max-width: 460px;
    margin: 0 auto;
}
.ibt-gate-icon    { font-size: 48px; margin-bottom: 16px; }
.ibt-gate h2      { font-size: 22px; font-weight: 500; margin-bottom: 8px; color: var(--ibt-navy); }
.ibt-gate p       { font-size: 14px; color: var(--ibt-muted); margin-bottom: 24px; line-height: 1.6; }
.ibt-gate-buttons { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   RESULTS PAGE
   ============================================================ */
.ibt-results-wrap  { padding: 28px 24px; max-width: 800px; margin: 0 auto; }
.ibt-results-hero  {
    background: var(--ibt-navy);
    color: #fff;
    border-radius: var(--ibt-radius-lg);
    padding: 28px;
    margin-bottom: 24px;
    text-align: center;
}
.ibt-band          { font-size: 64px; font-weight: 700; color: var(--ibt-teal); line-height: 1; }
.ibt-band-label    { font-size: 14px; opacity: .8; margin-top: 4px; }
.ibt-band-score    { font-size: 18px; margin-top: 12px; opacity: .9; }
.ibt-band-desc     { font-size: 13px; opacity: .7; margin-top: 6px; }

.ibt-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}
.ibt-stat-card {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    padding: 16px;
    text-align: center;
}
.ibt-stat-val   { font-size: 28px; font-weight: 500; }
.ibt-stat-label { font-size: 12px; color: var(--ibt-muted); margin-top: 4px; }
.ibt-correct-val { color: var(--ibt-correct); }
.ibt-wrong-val   { color: var(--ibt-wrong); }

/* answer review */
.ibt-review-section {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    margin-bottom: 12px;
    overflow: hidden;
}
.ibt-review-header {
    padding: 12px 16px;
    background: #F8FAFC;
    border-bottom: 1px solid var(--ibt-border);
    font-size: 13px;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}
.ibt-review-body { padding: 12px 16px; }
.ibt-review-row  {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid #F1F5F9;
    font-size: 13px;
}
.ibt-review-row:last-child { border-bottom: none; }
.ibt-review-num {
    min-width: 28px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    flex-shrink: 0;
}
.ibt-review-num.c { background: #E6F7F2; color: var(--ibt-correct); }
.ibt-review-num.w { background: #FEF2F2; color: var(--ibt-wrong); }
.ibt-review-detail { flex: 1; }
.ibt-review-q     { color: var(--ibt-muted); margin-bottom: 2px; font-size: 12px; }
.ibt-review-ans   { font-size: 12px; }
.ibt-review-ans .c { color: var(--ibt-correct); font-weight: 500; }
.ibt-review-ans .w { color: var(--ibt-wrong);   font-weight: 500; }
.ibt-review-explain {
    margin-top: 4px;
    font-size: 12px;
    color: #78350F;
    background: #FFFBEB;
    padding: 6px 8px;
    border-radius: 4px;
    border-left: 2px solid #F59E0B;
}

/* study plan */
.ibt-study-plan    { background: var(--ibt-surface); border: 1px solid var(--ibt-border); border-radius: var(--ibt-radius); padding: 20px; margin-top: 16px; }
.ibt-study-plan h3 { font-size: 16px; font-weight: 500; margin-bottom: 4px; }
.ibt-study-sub     { font-size: 13px; color: var(--ibt-muted); margin-bottom: 16px; }
.ibt-plan-item     { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid #F1F5F9; }
.ibt-plan-item:last-child { border-bottom: none; }
.ibt-plan-icon     { width: 36px; height: 36px; border-radius: var(--ibt-radius); display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 18px; background: var(--ibt-bg); }
.ibt-plan-text strong { font-size: 13px; font-weight: 500; display: block; }
.ibt-plan-text span   { font-size: 12px; color: var(--ibt-muted); }

/* ============================================================
   WRITING MODULE
   ============================================================ */
.ibt-writing-wrap { padding: 20px; max-width: 900px; margin: 0 auto; }
.ibt-task-header  { background: var(--ibt-navy); color: #fff; border-radius: var(--ibt-radius); padding: 16px 20px; margin-bottom: 16px; }
.ibt-task-header h3   { font-size: 16px; font-weight: 500; margin-bottom: 4px; }
.ibt-task-header .ibt-task-meta { font-size: 12px; opacity: .7; }
.ibt-task-prompt  {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    padding: 16px 20px;
    margin-bottom: 16px;
    font-size: 14px;
    line-height: 1.7;
}
.ibt-task-diagram {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    padding: 16px;
    margin-bottom: 16px;
    text-align: center;
}
.ibt-task-diagram img { max-width: 100%; height: auto; border-radius: 4px; }
.ibt-writing-area {
    width: 100%;
    min-height: 280px;
    padding: 14px;
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    font-size: 14px;
    line-height: 1.7;
    resize: vertical;
    font-family: inherit;
    color: var(--ibt-text);
    box-sizing: border-box;
}
.ibt-writing-area:focus { outline: none; border-color: var(--ibt-accent); }
.ibt-word-count { font-size: 12px; color: var(--ibt-muted); margin-top: 6px; text-align: right; }
.ibt-word-count.under { color: var(--ibt-wrong); }
.ibt-word-count.met   { color: var(--ibt-correct); }

/* writing results */
.ibt-writing-results { padding: 20px; max-width: 800px; margin: 0 auto; }
.ibt-criteria-grid   { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 20px; }
.ibt-criterion-card  {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    padding: 16px;
}
.ibt-criterion-card h4 { font-size: 13px; font-weight: 500; margin-bottom: 8px; color: var(--ibt-navy); }
.ibt-criterion-band    { font-size: 32px; font-weight: 700; color: var(--ibt-accent); margin-bottom: 6px; }
.ibt-criterion-comment { font-size: 12px; color: var(--ibt-text); line-height: 1.6; margin-bottom: 8px; }
.ibt-criterion-improve {
    font-size: 12px;
    color: #78350F;
    background: #FFFBEB;
    padding: 6px 8px;
    border-radius: 4px;
    border-left: 2px solid #F59E0B;
}

/* ============================================================
   SPEAKING MODULE
   ============================================================ */
.ibt-speaking-wrap  { padding: 20px; max-width: 720px; margin: 0 auto; }
.ibt-speaking-part  { margin-bottom: 24px; }
.ibt-part-header    {
    background: var(--ibt-navy);
    color: #fff;
    border-radius: var(--ibt-radius);
    padding: 14px 18px;
    margin-bottom: 16px;
}
.ibt-part-header h3 { font-size: 15px; font-weight: 500; margin-bottom: 2px; }
.ibt-part-header p  { font-size: 12px; opacity: .7; margin: 0; }

.ibt-speaking-q     {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    padding: 16px 20px;
    margin-bottom: 12px;
}
.ibt-speaking-q-num  { font-size: 12px; font-weight: 500; color: var(--ibt-accent); margin-bottom: 6px; }
.ibt-speaking-q-text { font-size: 15px; font-weight: 500; margin-bottom: 12px; }
.ibt-speaking-timer  {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--ibt-bg);
    border-radius: var(--ibt-radius);
    font-size: 13px;
    color: var(--ibt-muted);
    margin-bottom: 12px;
}
.ibt-speaking-timer-count { font-size: 18px; font-weight: 600; color: var(--ibt-accent); min-width: 48px; }
.ibt-speaking-timer-count.expired { color: var(--ibt-wrong); }

.ibt-cue-card {
    background: #FFFBEB;
    border: 1px solid #F59E0B;
    border-radius: var(--ibt-radius);
    padding: 20px;
    margin-bottom: 12px;
}
.ibt-cue-card h4    { font-size: 15px; font-weight: 500; margin-bottom: 12px; color: var(--ibt-navy); }
.ibt-cue-card ul    { padding-left: 20px; margin: 0 0 12px; }
.ibt-cue-card ul li { font-size: 14px; margin-bottom: 6px; }
.ibt-cue-card .ibt-cue-note { font-size: 12px; font-style: italic; color: var(--ibt-muted); }

/* ideal answer reveal */
.ibt-ideal-answer {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-teal);
    border-radius: var(--ibt-radius);
    padding: 16px 20px;
    margin-top: 12px;
    display: none;
}
.ibt-ideal-answer.show { display: block; }
.ibt-ideal-header { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.ibt-ideal-band   {
    background: var(--ibt-teal);
    color: #fff;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}
.ibt-ideal-label  { font-size: 13px; font-weight: 500; color: var(--ibt-teal-dark); }
.ibt-ideal-text   { font-size: 14px; line-height: 1.8; margin-bottom: 16px; white-space: pre-wrap; }
.ibt-vocab-highlights { margin-bottom: 12px; }
.ibt-vocab-highlights h5 { font-size: 12px; font-weight: 500; color: var(--ibt-muted); text-transform: uppercase; letter-spacing: .4px; margin-bottom: 8px; }
.ibt-vocab-item   { display: flex; gap: 8px; padding: 6px 0; border-bottom: 1px solid #F1F5F9; font-size: 12px; }
.ibt-vocab-item:last-child { border-bottom: none; }
.ibt-vocab-phrase { font-weight: 500; color: var(--ibt-navy); min-width: 140px; flex-shrink: 0; }
.ibt-vocab-note   { color: var(--ibt-muted); }
.ibt-structure-note {
    background: var(--ibt-bg);
    border-radius: var(--ibt-radius);
    padding: 10px 12px;
    font-size: 12px;
    color: var(--ibt-text);
    line-height: 1.6;
    margin-bottom: 8px;
}
.ibt-band-commentary {
    font-size: 12px;
    color: #1e40af;
    background: #EBF4FF;
    padding: 8px 10px;
    border-radius: var(--ibt-radius);
    border-left: 3px solid var(--ibt-accent);
}

/* ============================================================
   AUTH FORMS (register / login)
   ============================================================ */
.ibt-auth-wrap {
    max-width: 420px;
    margin: 48px auto;
    padding: 0 20px;
}
.ibt-auth-card {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius-lg);
    padding: 32px;
}
.ibt-auth-logo {
    text-align: center;
    margin-bottom: 24px;
}
.ibt-auth-logo span {
    font-size: 20px;
    font-weight: 600;
    color: var(--ibt-navy);
}
.ibt-auth-card h2 { font-size: 20px; font-weight: 500; margin-bottom: 6px; }
.ibt-auth-card p  { font-size: 13px; color: var(--ibt-muted); margin-bottom: 24px; }

.ibt-field        { margin-bottom: 16px; }
.ibt-field label  { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; }
.ibt-field input  {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    font-size: 14px;
    color: var(--ibt-text);
    box-sizing: border-box;
    outline: none;
    transition: border-color .15s;
}
.ibt-field input:focus { border-color: var(--ibt-accent); }
.ibt-field input.error { border-color: var(--ibt-wrong); }

.ibt-error-msg {
    background: #FEF2F2;
    border: 1px solid var(--ibt-wrong);
    border-radius: var(--ibt-radius);
    padding: 10px 12px;
    font-size: 13px;
    color: var(--ibt-wrong);
    margin-bottom: 16px;
}
.ibt-success-msg {
    background: #E6F7F2;
    border: 1px solid var(--ibt-correct);
    border-radius: var(--ibt-radius);
    padding: 10px 12px;
    font-size: 13px;
    color: var(--ibt-teal-dark);
    margin-bottom: 16px;
}

.ibt-auth-footer { text-align: center; margin-top: 20px; font-size: 13px; color: var(--ibt-muted); }
.ibt-auth-footer a { color: var(--ibt-accent); text-decoration: none; }
.ibt-auth-footer a:hover { text-decoration: underline; }

/* ============================================================
   BUTTONS
   ============================================================ */
.ibt-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: var(--ibt-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all .15s;
    border: none;
    text-decoration: none;
}
.ibt-btn-primary   { background: var(--ibt-navy);    color: #fff; }
.ibt-btn-primary:hover { background: #163a6b; }
.ibt-btn-teal      { background: var(--ibt-teal);    color: #fff; }
.ibt-btn-teal:hover    { background: var(--ibt-teal-dark); }
.ibt-btn-outline   { background: transparent; color: var(--ibt-navy); border: 1px solid var(--ibt-border); }
.ibt-btn-outline:hover { background: var(--ibt-bg); }
.ibt-btn-full      { width: 100%; }
.ibt-btn:disabled  { opacity: .6; cursor: not-allowed; }
.ibt-btn-sm        { padding: 6px 14px; font-size: 13px; }

/* ============================================================
   MODAL
   ============================================================ */
.ibt-modal-bg {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}
.ibt-modal {
    background: var(--ibt-surface);
    border-radius: var(--ibt-radius-lg);
    padding: 28px;
    max-width: 420px;
    width: 90%;
    text-align: center;
}
.ibt-modal h3 { font-size: 18px; font-weight: 500; margin-bottom: 8px; }
.ibt-modal p  { font-size: 14px; color: var(--ibt-muted); margin-bottom: 20px; line-height: 1.6; }
.ibt-modal-btns { display: flex; gap: 10px; justify-content: center; }

/* ============================================================
   MOBILE — stacked layout
   ============================================================ */
@media (max-width: 700px) {
    .ibt-body           { flex-direction: column; min-height: auto; overflow: visible; }
    .ibt-passage        { border-right: none; border-bottom: 1px solid var(--ibt-border); max-height: 300px; overflow-y: auto; }
    .ibt-questions      { width: 100%; }
    .ibt-stats-grid     { grid-template-columns: repeat(3, 1fr); }
    .ibt-criteria-grid  { grid-template-columns: 1fr; }
    .ibt-vocab-phrase   { min-width: 100px; }
    .ibt-auth-card      { padding: 24px 20px; }
    .ibt-results-wrap,
    .ibt-writing-wrap,
    .ibt-speaking-wrap  { padding: 16px; }
}





/* ibt-final-patch — 60/40 split, header, font toggle, mobile scroll */

/* ── Desktop: 60/40 sticky split ── */
@media (min-width: 701px) {
    .ibt-body {
        height: calc(100vh - 64px - 46px - 56px);
        overflow: hidden;
    }
    .ibt-passage {
        width: 60%;
        flex: none;
        height: 100%;
        overflow-y: auto;
        padding: 28px;
        border-right: 1px solid var(--ibt-border);
        background: var(--ibt-surface);
        -webkit-overflow-scrolling: touch;
    }
    .ibt-questions {
        width: 40%;
        flex: none;
        height: 100%;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    .ibt-passage-body  { font-size: var(--ibt-passage-font, 14px); line-height: 1.85; }
    .ibt-passage-title { font-size: 16px; }
    .ibt-q-text        { font-size: var(--ibt-q-font, 13px); }
    .ibt-opt           { font-size: var(--ibt-q-font, 13px); }
    .ibt-tfng-btn      { font-size: var(--ibt-tfng-font, 12px); }
    .ibt-fill-input    { font-size: var(--ibt-q-font, 13px); }
}

/* ── Header: larger ── */
.ibt-header       { height: 64px; padding: 0 24px; }
.ibt-header-logo  { font-size: 16px; font-weight: 600; letter-spacing: -0.2px; }
.ibt-header-badge { font-size: 13px; padding: 4px 14px; border-radius: 20px; }
.ibt-timer        { font-size: 17px; font-weight: 600; gap: 6px; }
.ibt-btn-submit   { padding: 9px 22px; font-size: 14px; font-weight: 500; }
.ibt-tabs         { height: 46px; align-items: stretch; }
.ibt-tab          { display: flex; align-items: center; font-size: 13.5px; padding: 0 18px; }
.ibt-nav          { padding: 14px 18px; min-height: 56px; }
.ibt-nav-dot      { width: 30px; height: 30px; font-size: 11px; font-weight: 500; }

/* ── Font size toggle ── */
.ibt-font-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-right: 8px;
}
.ibt-font-btn {
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.2);
    color: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    line-height: 1;
    transition: background .15s;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
}
.ibt-font-btn:hover  { background: rgba(255,255,255,.22); }
.ibt-font-btn.active { background: var(--ibt-teal); border-color: var(--ibt-teal); }

/* ── Mobile: both panels scroll ── */
@media (max-width: 700px) {
    .ibt-header       { height: auto; min-height: 52px; padding: 10px 14px; flex-wrap: wrap; gap: 8px; }
    .ibt-header-logo  { font-size: 14px; }
    .ibt-header-badge { font-size: 11px; padding: 3px 10px; max-width: 130px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .ibt-timer        { font-size: 14px; }
    .ibt-btn-submit   { padding: 7px 14px; font-size: 13px; }
    .ibt-font-toggle  { display: none; }
    .ibt-tab          { padding: 0 14px; font-size: 12px; }
    .ibt-nav          { padding: 10px 14px; gap: 4px; }
    .ibt-nav-dot      { width: 26px; height: 26px; font-size: 10px; }
    .ibt-body         { display: flex; flex-direction: column; overflow: visible; }
    .ibt-passage      { max-height: 45vh; overflow-y: auto; border-right: none; border-bottom: 2px solid var(--ibt-border); padding: 16px; -webkit-overflow-scrolling: touch; }
    .ibt-questions    { max-height: 45vh; overflow-y: auto; width: 100%; -webkit-overflow-scrolling: touch; }
}


/* ibt-mobile-6040 — correct 60/40 mobile split */
@media (max-width: 700px) {

    /* The chrome that eats vertical space on mobile:
       site header ~56px + test header ~52px + tabs ~40px + nav strip ~48px = ~196px
       Available for panels: calc(100vh - 196px)
       Passage  60% of that = calc((100vh - 196px) * 0.6)
       Questions 40% of that = calc((100vh - 196px) * 0.4)
    */

    .ibt-body {
        display: flex !important;
        flex-direction: column !important;
        overflow: visible !important;
        height: auto !important;
    }

    .ibt-passage {
        max-height: none !important;
        height: calc((100vh - 196px) * 0.60) !important;
        min-height: 200px !important;
        overflow-y: auto !important;
        border-right: none !important;
        border-bottom: 2px solid var(--ibt-border) !important;
        padding: 16px !important;
        -webkit-overflow-scrolling: touch !important;
        box-sizing: border-box !important;
    }

    .ibt-questions {
        max-height: none !important;
        height: calc((100vh - 196px) * 0.40) !important;
        min-height: 160px !important;
        overflow-y: auto !important;
        width: 100% !important;
        -webkit-overflow-scrolling: touch !important;
        box-sizing: border-box !important;
    }
}


/* ibt-mobile-borders — visible question panel on mobile */
@media (max-width: 700px) {

    /* Passage — label it clearly */
    .ibt-passage {
        position: relative !important;
    }

    .ibt-passage::before {
        content: "PASSAGE — scroll to read ↕";
        display: block;
        font-size: 10px;
        font-weight: 600;
        letter-spacing: 0.6px;
        color: var(--ibt-teal);
        text-transform: uppercase;
        margin-bottom: 10px;
        padding-bottom: 8px;
        border-bottom: 1px dashed var(--ibt-border);
    }

    /* Questions panel — strong visible border, distinct background */
    .ibt-questions {
        border: 2px solid var(--ibt-accent) !important;
        border-radius: 0 !important;
        background: #F0F6FF !important;
        position: relative !important;
    }

    /* Questions label at top of panel */
    .ibt-questions::before {
        content: "QUESTIONS — scroll to answer ↕";
        display: block;
        font-size: 10px;
        font-weight: 600;
        letter-spacing: 0.6px;
        color: var(--ibt-accent);
        text-transform: uppercase;
        padding: 8px 14px 6px;
        background: #E0EDFF;
        border-bottom: 1px solid #C8DCFA;
        position: sticky;
        top: 0;
        z-index: 10;
    }

    /* Scroll hint fade at bottom of questions panel */
    .ibt-questions::after {
        content: "";
        display: block;
        height: 32px;
        background: linear-gradient(to bottom, transparent, #F0F6FF);
        position: sticky;
        bottom: 0;
        pointer-events: none;
    }

    /* Keep question groups readable on the tinted background */
    .ibt-q-group {
        background: #ffffff !important;
        margin: 10px 10px !important;
    }
}

/* ibt-ui-patch2 */

/* Results wider + larger fonts */
.ibt-results-wrap { max-width: 1100px !important; padding: 32px !important; }
.ibt-review-row   { font-size: 14px !important; padding: 12px 0 !important; }
.ibt-review-q     { font-size: 13px !important; }
.ibt-review-ans   { font-size: 13px !important; }
.ibt-review-explain { font-size: 13px !important; }
.ibt-review-num   { min-width: 32px !important; height: 28px !important; font-size: 12px !important; }
.ibt-review-header { font-size: 14px !important; padding: 14px 18px !important; }
.ibt-review-body  { padding: 14px 18px !important; }
.ibt-stat-val     { font-size: 36px !important; }
.ibt-stat-label   { font-size: 13px !important; }
.ibt-stats-grid   { gap: 16px !important; margin-bottom: 28px !important; }
.ibt-study-plan   { padding: 24px !important; }
.ibt-plan-text strong { font-size: 14px !important; }
.ibt-plan-text span   { font-size: 13px !important; }

/* Writing box — taller, larger font */
.ibt-writing-area { min-height: 360px !important; font-size: 16px !important; line-height: 1.8 !important; padding: 16px !important; }
.ibt-writing-wrap { max-width: 100% !important; padding: 20px 28px !important; }
.ibt-task-prompt  { font-size: 15px !important; line-height: 1.75 !important; padding: 18px 22px !important; }
.ibt-task-diagram { padding: 20px !important; margin-bottom: 20px !important; }
.ibt-task-diagram img { max-width: 680px !important; }

/* Word/char counter bar */
.ibt-counter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
    font-size: 13px;
    color: var(--ibt-muted);
}
.ibt-counter-bar .ibt-word-count { margin: 0 !important; }
.ibt-char-count { font-size: 12px; color: var(--ibt-muted); }

/* Speaking instructions */
.ibt-speaking-instructions {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius-lg);
    padding: 24px 28px;
    margin-bottom: 24px;
}
.ibt-speaking-instructions h3 {
    font-size: 16px; font-weight: 500; color: var(--ibt-navy);
    margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--ibt-border);
}
.ibt-instr-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px;
}
.ibt-instr-card {
    background: var(--ibt-bg); border-radius: var(--ibt-radius);
    padding: 14px 16px; display: flex; gap: 12px; align-items: flex-start;
}
.ibt-instr-icon { font-size: 22px; flex-shrink: 0; }
.ibt-instr-text strong { font-size: 13px; font-weight: 500; display: block; margin-bottom: 3px; }
.ibt-instr-text span   { font-size: 12px; color: var(--ibt-muted); line-height: 1.5; }
.ibt-instr-tip {
    background: #FFFBEB; border-left: 3px solid #F59E0B;
    border-radius: 0 var(--ibt-radius) var(--ibt-radius) 0;
    padding: 10px 14px; font-size: 13px; color: #78350F; margin-bottom: 16px;
}
.ibt-instr-parts { display: flex; gap: 10px; flex-wrap: wrap; }
.ibt-instr-part-badge {
    background: var(--ibt-navy); color: #fff; border-radius: var(--ibt-radius);
    padding: 8px 14px; font-size: 12px; flex: 1; min-width: 140px;
}
.ibt-instr-part-badge strong { display: block; font-size: 13px; margin-bottom: 2px; }

/* Diagram fallback */
.ibt-diagram-fallback {
    display: none; background: #F8FAFC; border: 1px dashed var(--ibt-border);
    border-radius: 8px; padding: 20px; text-align: center; font-size: 13px; color: var(--ibt-muted);
}

@media (max-width: 700px) {
    .ibt-results-wrap  { padding: 16px !important; }
    .ibt-instr-grid    { grid-template-columns: 1fr !important; }
    .ibt-writing-wrap  { padding: 12px 16px !important; }
    .ibt-writing-area  { min-height: 260px !important; font-size: 15px !important; }
}
/* ibt-ui-improvements */

/* Results wider + larger fonts */
.ibt-results-wrap { max-width: 1100px !important; padding: 32px !important; }
.ibt-review-row   { font-size: 14px !important; padding: 12px 0 !important; }
.ibt-review-q     { font-size: 13px !important; }
.ibt-review-ans   { font-size: 13px !important; }
.ibt-review-explain { font-size: 13px !important; }
.ibt-review-num   { min-width: 32px !important; height: 28px !important; font-size: 12px !important; }
.ibt-review-header { font-size: 14px !important; padding: 14px 18px !important; }
.ibt-review-body  { padding: 14px 18px !important; }
.ibt-stat-val     { font-size: 36px !important; }
.ibt-stat-label   { font-size: 13px !important; }
.ibt-stats-grid   { gap: 16px !important; margin-bottom: 28px !important; }
.ibt-study-plan   { padding: 24px !important; }
.ibt-plan-text strong { font-size: 14px !important; }
.ibt-plan-text span   { font-size: 13px !important; }

/* Writing box taller + larger font */
.ibt-writing-area { min-height: 360px !important; font-size: 16px !important; line-height: 1.8 !important; padding: 16px !important; }
.ibt-writing-wrap { max-width: 100% !important; padding: 20px 28px !important; }
.ibt-task-prompt  { font-size: 15px !important; line-height: 1.75 !important; padding: 18px 22px !important; }
.ibt-task-diagram { padding: 20px !important; margin-bottom: 20px !important; }
.ibt-task-diagram img { max-width: 680px !important; }

/* Word + character counter */
.ibt-counter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
}
.ibt-counter-bar .ibt-word-count { margin: 0 !important; }
.ibt-char-count { font-size: 12px; color: var(--ibt-muted); }

/* Diagram fallback */
.ibt-diagram-fallback {
    display: none;
    background: #F8FAFC;
    border: 1px dashed var(--ibt-border);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    font-size: 13px;
    color: var(--ibt-muted);
}

/* Speaking instructions */
.ibt-speaking-instructions {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius-lg);
    padding: 24px 28px;
    margin-bottom: 24px;
}
.ibt-speaking-instructions h3 {
    font-size: 16px; font-weight: 500; color: var(--ibt-navy);
    margin-bottom: 16px; padding-bottom: 12px;
    border-bottom: 1px solid var(--ibt-border);
}
.ibt-instr-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 16px; margin-bottom: 20px;
}
.ibt-instr-card {
    background: var(--ibt-bg); border-radius: var(--ibt-radius);
    padding: 14px 16px; display: flex; gap: 12px; align-items: flex-start;
}
.ibt-instr-icon { font-size: 22px; flex-shrink: 0; }
.ibt-instr-text strong { font-size: 13px; font-weight: 500; display: block; margin-bottom: 3px; }
.ibt-instr-text span   { font-size: 12px; color: var(--ibt-muted); line-height: 1.5; }
.ibt-instr-tip {
    background: #FFFBEB; border-left: 3px solid #F59E0B;
    border-radius: 0 var(--ibt-radius) var(--ibt-radius) 0;
    padding: 10px 14px; font-size: 13px; color: #78350F; margin-bottom: 16px;
}
.ibt-instr-parts { display: flex; gap: 10px; flex-wrap: wrap; }
.ibt-instr-part-badge {
    background: var(--ibt-navy); color: #fff; border-radius: var(--ibt-radius);
    padding: 10px 14px; font-size: 12px; flex: 1; min-width: 140px;
}
.ibt-instr-part-badge strong { display: block; font-size: 13px; margin-bottom: 4px; }

@media (max-width: 700px) {
    .ibt-results-wrap  { padding: 16px !important; }
    .ibt-instr-grid    { grid-template-columns: 1fr !important; }
    .ibt-writing-wrap  { padding: 12px 16px !important; }
    .ibt-writing-area  { min-height: 260px !important; font-size: 15px !important; }
}
/* ── Dashboard redesign — Group D ── */

/* Wider shell */
#ibt-dashboard-root {
    padding: 24px;
    box-sizing: border-box;
}

/* Skill card hover lift */
.ibt-sc-hover:hover {
    box-shadow: 0 4px 16px rgba(11,37,69,.10);
    transform: translateY(-1px);
    transition: all .15s;
}

/* Countdown number */
.ibt-days-num {
    font-size: 52px;
    font-weight: 700;
    color: var(--ibt-text);
    line-height: 1;
}

/* Progress bar track */
.ibt-prog-track {
    height: 6px;
    background: var(--ibt-bg);
    border-radius: 3px;
    overflow: hidden;
    margin: 6px 0 12px;
}
.ibt-prog-fill {
    height: 100%;
    border-radius: 3px;
    transition: width .4s ease;
}

/* Vocab word card */
.ibt-vocab-card {
    background: var(--ibt-surface);
    border: 1px solid var(--ibt-border);
    border-radius: 10px;
    padding: 14px 16px;
    position: relative;
}
.ibt-vocab-word {
    font-size: 15px;
    font-weight: 600;
    color: var(--ibt-text);
    margin-bottom: 4px;
}
.ibt-vocab-def {
    font-size: 13px;
    color: var(--ibt-muted);
    line-height: 1.5;
}
.ibt-vocab-src {
    font-size: 11px;
    color: var(--ibt-teal);
    margin-top: 6px;
    font-weight: 500;
}

/* Prep guide badge colours */
.pb-red { background: #FEF2F2; color: #991B1B; }
.pb-amb { background: #FFFBEB; color: #78350F; }
.pb-grn { background: #ECFDF5; color: #065F46; }

/* Responsive — narrow screens */
@media (max-width: 780px) {
    #ibt-dashboard-root { padding: 8px; }
}

/* ================================================================
   DASHBOARD — Single page scrolling design
   ================================================================ */

.db {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px 48px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    box-sizing: border-box;
}

/* Top header bar */
.db-hdr {
    background: #0B2545;
    border-radius: 12px;
    padding: 20px 28px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.db-hdr h2 { color: #fff; font-size: 22px; font-weight: 600; margin-bottom: 3px; }
.db-hdr p  { color: rgba(255,255,255,.55); font-size: 13px; }
.db-hdr-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.badge-t { background: rgba(29,158,117,.3); color: #9FE1CB; padding: 6px 14px; border-radius: 20px; font-size: 13px; font-weight: 500; }
.badge-e { background: rgba(255,255,255,.1); color: rgba(255,255,255,.75); padding: 6px 14px; border-radius: 20px; font-size: 13px; }
.btn-lo  { background: rgba(255,255,255,.08); color: rgba(255,255,255,.6); padding: 6px 12px; border-radius: 6px; font-size: 12px; border: 0.5px solid rgba(255,255,255,.15); cursor: pointer; }
.btn-lo:hover { background: rgba(255,255,255,.15); color: #fff; }

/* Section divider bars */
.sec-bar { display: flex; align-items: center; justify-content: space-between; padding: 10px 18px; border-radius: 8px; margin-bottom: 16px; }
.sec-bar-navy   { background: #0B2545; }
.sec-bar-teal   { background: #0A3D2E; }
.sec-bar-amber  { background: #3D2600; }
.sec-bar-violet { background: #1E0F3D; }
.sec-bar-left   { display: flex; align-items: center; gap: 10px; }
.sec-bar-left i { font-size: 18px; }
.sec-bar-navy i  { color: rgba(255,255,255,.6); }
.sec-bar-teal i  { color: #5DCAA5; }
.sec-bar-amber i { color: #FAC775; }
.sec-bar-violet i{ color: #AFA9EC; }
.sec-bar h3  { font-size: 15px; font-weight: 500; color: #fff; }
.sec-bar-right { font-size: 13px; color: rgba(255,255,255,.5); }
.sec-bar a   { color: rgba(255,255,255,.6); font-size: 13px; text-decoration: none; }
.sec-bar a:hover { color: #fff; }

/* 4-column skill snapshot */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}
.skill-card {
    background: #fff;
    border: 0.5px solid var(--ibt-border);
    border-radius: 12px;
    padding: 16px 18px;
}
.s-icon { width: 36px; height: 36px; border-radius: 7px; display: flex; align-items: center; justify-content: center; margin-bottom: 10px; }
.s-icon i { font-size: 18px; }
.s-name  { font-size: 12px; color: var(--ibt-muted); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 6px; font-weight: 500; }
.s-band  { font-size: 30px; font-weight: 700; color: var(--ibt-text); line-height: 1; }
.s-meta  { font-size: 12px; color: var(--ibt-muted); margin-top: 4px; }
.s-trend { font-size: 12px; font-weight: 500; margin-top: 5px; display: flex; align-items: center; gap: 4px; }
.s-trend.up   { color: #1D9E75; }
.s-trend.down { color: #E24B4A; }
.s-trend.muted{ color: var(--ibt-muted); }

/* Recommended card */
.rec {
    background: #112F52;
    border: 0.5px solid #1D4E7A;
    border-radius: 12px;
    padding: 14px 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 14px;
}
.rec-info { flex: 1; }
.rec-lbl  { font-size: 11px; color: rgba(255,255,255,.4); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 3px; }
.rec-ttl  { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 2px; }
.rec-sub  { font-size: 12px; color: rgba(255,255,255,.5); line-height: 1.5; }
.rec-btn  { background: #1D9E75; color: #fff; padding: 9px 18px; border-radius: 7px; font-size: 13px; font-weight: 500; border: none; cursor: pointer; white-space: nowrap; flex-shrink: 0; text-decoration: none; display: inline-block; }
.rec-btn:hover { background: #0F6E56; color: #fff; }

/* 2-column layout */
.two-col {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 14px;
    margin-bottom: 20px;
}
.card { background: #fff; border: 0.5px solid var(--ibt-border); border-radius: 12px; padding: 16px 20px; }
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 14px; color: var(--ibt-text); display: flex; align-items: center; gap: 7px; }
.card-title i { font-size: 16px; color: var(--ibt-muted); }

/* History rows */
.hist-row { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 0.5px solid var(--ibt-border); }
.hist-row:last-of-type { border-bottom: none; }
.h-icon  { width: 30px; height: 30px; border-radius: 6px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.h-icon i{ font-size: 15px; }
.h-info  { flex: 1; min-width: 0; }
.h-name  { font-size: 14px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ibt-text); }
.h-date  { font-size: 13px; color: var(--ibt-muted); }
.h-band  { font-size: 16px; font-weight: 500; color: var(--ibt-text); flex-shrink: 0; }
.h-redo  { font-size: 12px; color: #1D9E75; background: #E1F5EE; padding: 3px 9px; border-radius: 5px; text-decoration: none; flex-shrink: 0; }

/* Side stack */
.side-stack { display: flex; flex-direction: column; gap: 12px; }

/* Countdown */
.cdown   { text-align: center; padding: 4px 0; }
.cdown-n { font-size: 44px; font-weight: 600; color: var(--ibt-text); line-height: 1; }
.cdown-s { font-size: 13px; color: var(--ibt-muted); margin-top: 4px; }
.cdown-d { font-size: 14px; font-weight: 500; color: #1D9E75; margin-top: 8px; }

/* Profile rows */
.p-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.p-row:last-of-type { margin: 0; }
.p-lbl { font-size: 13px; color: var(--ibt-muted); }
.p-val { font-size: 13px; font-weight: 500; background: var(--ibt-bg); padding: 4px 11px; border-radius: 5px; color: var(--ibt-text); }

/* Gap to target */
.gap-row { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--ibt-muted); margin-bottom: 4px; }
.g-icon  { width: 24px; height: 24px; border-radius: 5px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.g-icon i{ font-size: 13px; }
.g-band  { font-weight: 500; color: var(--ibt-text); margin-left: auto; font-size: 15px; }
.g-diff  { font-size: 12px; min-width: 42px; text-align: right; }
.prog-wrap { margin-bottom: 10px; }
.prog-bar  { height: 4px; background: var(--ibt-bg); border-radius: 2px; overflow: hidden; }
.prog-fill { height: 100%; background: #1D9E75; border-radius: 2px; transition: width .4s ease; }
.g-sum   { margin-top: 12px; padding: 10px 12px; background: var(--ibt-bg); border-radius: 7px; font-size: 13px; color: var(--ibt-muted); }

/* Prep guide */
.prep-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}
.prep-card { background: #fff; border: 0.5px solid var(--ibt-border); border-radius: 12px; padding: 16px 18px; }
.prep-top  { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; padding-bottom: 10px; border-bottom: 0.5px solid var(--ibt-border); }
.pbadge    { display: inline-flex; align-items: center; gap: 4px; padding: 3px 9px; border-radius: 6px; font-size: 11px; font-weight: 500; }
.pb-red    { background: #FEF2F2; color: #991B1B; }
.pb-amb    { background: #FFFBEB; color: #78350F; }
.pb-grn    { background: #ECFDF5; color: #065F46; }
.prep-txt  { font-size: 14px; color: var(--ibt-muted); line-height: 1.65; }
.prep-cta  { font-size: 13px; color: #1D9E75; font-weight: 500; margin-top: 10px; display: inline-flex; align-items: center; gap: 5px; text-decoration: none; }
.prep-cta:hover { color: #0F6E56; }

/* Vocabulary */
.vocab-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 32px;
}
.vw   { background: var(--ibt-bg); border-radius: 7px; padding: 10px 12px; border-left: 3px solid #1D9E75; position: relative; }
.vw-w { font-size: 14px; font-weight: 600; color: var(--ibt-text); margin-bottom: 3px; }
.vw-d { font-size: 12px; color: var(--ibt-muted); line-height: 1.5; }
.vw-s { font-size: 11px; color: rgba(29,158,117,.8); margin-top: 4px; }
.v-add { background: #fff; border: 0.5px dashed var(--ibt-border); border-radius: 7px; display: flex; align-items: center; justify-content: center; cursor: pointer; min-height: 80px; transition: border-color .15s; }
.v-add:hover { border-color: #1D9E75; }
.v-add-in { text-align: center; color: var(--ibt-muted); }
.v-add-in i { font-size: 20px; display: block; margin-bottom: 4px; }

/* Responsive */
@media (max-width: 900px) {
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
    .prep-grid   { grid-template-columns: repeat(2, 1fr); }
    .two-col     { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .db           { padding: 10px 10px 40px; }
    .db-hdr       { padding: 14px 16px; flex-direction: column; align-items: flex-start; gap: 10px; }
    .db-hdr h2    { font-size: 18px; }
    .db-hdr-right { gap: 8px; flex-wrap: wrap; }
    .badge-t, .badge-e { font-size: 12px; padding: 5px 10px; }
    .skills-grid  { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .skill-card   { padding: 12px 14px; }
    .s-band       { font-size: 24px; }
    .vocab-grid   { grid-template-columns: repeat(2, 1fr); }
    .prep-grid    { grid-template-columns: 1fr; }
    .two-col      { grid-template-columns: 1fr; }
    .rec          { flex-direction: column; align-items: flex-start; gap: 10px; }
    .rec-btn      { width: 100%; text-align: center; }
    .sec-bar      { padding: 9px 14px; }
    .sec-bar h3   { font-size: 13px; }
    .card         { padding: 14px 16px; }
    .card-title   { font-size: 13px; }
    .h-name       { font-size: 12px; }
    .cdown-n      { font-size: 36px; }
}

/* ================================================================
   MOBILE FIXES — Issues 2, 4, 5, 6
   ================================================================ */

/* Issue 4 — Listening: stack label above native audio control on mobile */
@media (max-width: 700px) {
    .ibt-audio-wrap {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 8px !important;
        padding: 12px 14px !important;
    }
    .ibt-audio-wrap audio {
        width: 100% !important;
        flex: none !important;
    }
    .ibt-audio-section-label {
        font-size: 12px !important;
    }
}

/* Issue 5 — Reading: questions panel must show at least 2 questions on mobile */
@media (max-width: 700px) {
    .ibt-questions {
        height: calc((100vh - 196px) * 0.45) !important;
        min-height: 200px !important;
    }
    .ibt-passage {
        height: calc((100vh - 196px) * 0.55) !important;
        min-height: 180px !important;
    }
}

/* Issue 2 — Dashboard mobile: ensure CSS classes load correctly */
@media (max-width: 640px) {
    .db { padding: 8px 10px 40px !important; }
    .db-hdr { flex-direction: column; align-items: flex-start; padding: 14px 16px; }
    .db-hdr h2 { font-size: 18px; }
    .db-hdr-right { gap: 6px; flex-wrap: wrap; }
    .skills-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; }
    .prep-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .two-col { grid-template-columns: 1fr !important; }
    .vocab-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .rec { flex-direction: column !important; align-items: flex-start !important; }
    .rec-btn { width: 100% !important; text-align: center !important; display: block !important; }
    .sec-bar { padding: 8px 12px; }
    .sec-bar h3 { font-size: 13px; }
    .card { padding: 12px 14px; }
    .s-band { font-size: 24px !important; }
    .skill-card { padding: 12px 12px !important; }
    .hist-row { gap: 7px; }
    .h-name { font-size: 13px !important; }
}

/* ── Back button in test header ── */
.ibt-back-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    flex-shrink: 0;
    transition: background .15s, color .15s;
    margin-right: 4px;
}
.ibt-back-btn:hover {
    background: rgba(255,255,255,0.18);
    color: #fff;
}
@media (max-width: 700px) {
    .ibt-back-btn { width: 28px; height: 28px; }
}


/* ================================================================
   IELTS WRITING AI EVALUATION — RESULTS UI
   ================================================================ */

.ibt-eval-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;text-align:center;min-height:240px}
.ibt-eval-spinner{width:56px;height:56px;margin-bottom:20px}
.ibt-spinner-svg{width:100%;height:100%}
.ibt-eval-step{font-size:16px;font-weight:600;color:var(--ibt-text,#1e293b);margin:0 0 8px;min-height:24px}
.ibt-eval-loading-sub{font-size:13px;color:var(--ibt-text-muted,#64748b);margin:0}

.ibt-eval-results{font-family:inherit;max-width:720px;margin:0 auto;padding:0 0 32px}

.ibt-band-hero{display:flex;align-items:center;gap:24px;background:var(--ibt-surface,#f8fafc);border:2px solid var(--ibt-border,#e2e8f0);border-radius:16px;padding:28px 32px;margin-bottom:24px}
.ibt-band-circle{flex-shrink:0;width:96px;height:96px;border-radius:50%;border:4px solid;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#fff}
.ibt-band-number{font-size:32px;font-weight:800;line-height:1}
.ibt-band-label-small{font-size:10px;font-weight:600;color:var(--ibt-text-muted,#64748b);text-transform:uppercase;letter-spacing:.5px;margin-top:2px}
.ibt-band-meta{flex:1}
.ibt-band-title{font-size:20px;font-weight:700;color:var(--ibt-text,#1e293b);margin:0 0 6px}
.ibt-band-descriptor{font-size:17px;font-weight:600;margin:0 0 4px}
.ibt-word-count{font-size:13px;color:var(--ibt-text-muted,#64748b);margin:0}

.ibt-criteria-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px}
.ibt-criterion-card{background:#fff;border:1px solid var(--ibt-border,#e2e8f0);border-radius:12px;padding:16px}
.ibt-criterion-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;gap:8px}
.ibt-criterion-name{font-size:13px;font-weight:600;color:var(--ibt-text,#1e293b);flex:1}
.ibt-criterion-band{flex-shrink:0;width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;color:#fff}
.ibt-criterion-comment{font-size:13px;color:var(--ibt-text-muted,#475569);margin:0;line-height:1.5}

.ibt-feedback-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:24px}
.ibt-feedback-col{border-radius:12px;padding:20px}
.ibt-strengths-col{background:#f0fdf4;border:1px solid #bbf7d0}
.ibt-improvements-col{background:#fffbeb;border:1px solid #fde68a}
.ibt-feedback-heading{font-size:14px;font-weight:700;margin:0 0 12px;display:flex;align-items:center;gap:6px}
.ibt-strengths-heading{color:#15803d}
.ibt-improvements-heading{color:#b45309}
.ibt-feedback-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.ibt-strength-item,.ibt-improvement-item{font-size:13px;line-height:1.5;display:flex;gap:8px}
.ibt-strength-item{color:#166534}
.ibt-improvement-item{color:#92400e}
.ibt-check-icon,.ibt-arrow-icon{flex-shrink:0;font-weight:700}

.ibt-improved-sentence{background:#f8fafc;border:1px solid var(--ibt-border,#e2e8f0);border-radius:12px;padding:20px;margin-bottom:16px}
.ibt-improved-heading{font-size:14px;font-weight:700;color:var(--ibt-text,#1e293b);margin:0 0 14px;display:flex;align-items:center;gap:6px}
.ibt-sentence-original,.ibt-sentence-improved{padding:10px 14px;border-radius:8px;margin-bottom:4px}
.ibt-sentence-original{background:#fee2e2;border-left:3px solid #ef4444}
.ibt-sentence-improved{background:#dcfce7;border-left:3px solid #22c55e}
.ibt-sentence-label{display:block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px;color:var(--ibt-text-muted,#64748b)}
.ibt-sentence-text{font-size:14px;font-style:italic;margin:0;color:var(--ibt-text,#1e293b);line-height:1.6}
.ibt-sentence-arrow{text-align:center;font-size:18px;color:var(--ibt-text-muted,#94a3b8);margin:4px 0}
.ibt-sentence-explanation{font-size:13px;color:var(--ibt-text-muted,#475569);margin:10px 0 0;font-style:italic;line-height:1.5}

.ibt-examiner-note{display:flex;align-items:flex-start;gap:12px;background:#eff6ff;border:1px solid #bfdbfe;border-radius:12px;padding:16px 20px;margin-bottom:24px}
.ibt-examiner-icon{font-size:20px;flex-shrink:0;margin-top:2px}
.ibt-examiner-text{font-size:14px;color:#1e40af;line-height:1.6}

.ibt-eval-cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:8px}

.ibt-eval-error{text-align:center;padding:40px 24px}
.ibt-error-icon{font-size:32px;display:block;margin-bottom:12px}
.ibt-eval-error p{font-size:15px;color:var(--ibt-text,#1e293b);margin-bottom:16px}

.ibt-guest-limit-cta{text-align:center;padding:48px 24px;background:var(--ibt-surface,#f8fafc);border-radius:16px;border:2px solid var(--ibt-border,#e2e8f0)}
.ibt-guest-limit-icon{font-size:40px;margin-bottom:12px}
.ibt-guest-limit-cta h3{font-size:20px;font-weight:700;margin-bottom:8px;color:var(--ibt-text,#1e293b)}
.ibt-guest-limit-cta p{font-size:15px;color:var(--ibt-text-muted,#475569);margin-bottom:20px}
.ibt-guest-post-eval-banner{background:#eff6ff;border:1px solid #bfdbfe;border-radius:12px;padding:16px 20px;margin-top:24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.ibt-guest-post-eval-banner p{margin:0;font-size:14px;color:#1e40af}

@media(max-width:560px){
  .ibt-criteria-grid{grid-template-columns:1fr}
  .ibt-feedback-row{grid-template-columns:1fr}
  .ibt-band-hero{flex-direction:column;text-align:center}
}

/* ============================================================
   multi_select  ("Choose TWO letters, A-E")  — added for Tests 11-20
   Mirrors .ibt-opt conventions; uses existing CSS variables.
   ============================================================ */
.ibt-ms-options { display: flex; flex-direction: column; gap: 5px; margin-top: 4px; }
.ibt-ms-option {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px;
    border: 1px solid var(--ibt-border);
    border-radius: var(--ibt-radius);
    cursor: pointer; font-size: 13px;
    transition: border-color .12s, background .12s;
}
.ibt-ms-option:hover:not(.is-disabled):not(.correct):not(.wrong) { border-color: var(--ibt-accent); background: var(--ibt-accent-bg); }
.ibt-ms-option.is-selected { border-color: var(--ibt-accent); background: var(--ibt-accent-bg); color: var(--ibt-accent); font-weight: 500; }
.ibt-ms-option.is-disabled { opacity: .5; cursor: not-allowed; }
.ibt-ms-option.correct { border-color: var(--ibt-correct); background: #E6F7F2; color: var(--ibt-correct); }
.ibt-ms-option.wrong   { border-color: var(--ibt-wrong);   background: #FEF2F2; color: var(--ibt-wrong); }
.ibt-ms-option input[type="checkbox"] { width: 16px; height: 16px; flex-shrink: 0; accent-color: var(--ibt-teal); cursor: inherit; }
.ibt-ms-letter { font-weight: 600; min-width: 16px; flex-shrink: 0; }
.ibt-ms-text { flex: 1; }
.ibt-ms-counter { font-size: 12px; color: var(--ibt-muted); margin-top: 6px; }
@media (max-width: 768px) {
    .ibt-ms-option { font-size: var(--ibt-q-font, 13px); }
}