/*
 * MatTura — Teal tema
 * Barve temeljijo na Tailwind teal paleti
 */

:root {
    --mt-primary:   #0f766e;  /* teal-600 */
    --mt-secondary: #134e4a;  /* teal-900 */
    --mt-accent:    #14b8a6;  /* teal-500 */
    --mt-light:     #f0fdfa;  /* teal-50  */
    --mt-border:    #99f6e4;  /* teal-200 */
    --mt-text:      #1e3a8a;
    --mt-muted:     #5eead4;
    --mt-radius:    8px;
    --mt-shadow:    0 2px 12px rgba(13,148,136,.12);
}

/* ---- IZPITNA POLA (frontend) ---- */
.mattura-exam-wrap {
    font-family: 'Georgia', serif;
    max-width: 860px;
    margin: 0 auto;
    background: #fff;
    border: 2px solid var(--mt-primary);
    border-radius: var(--mt-radius);
    overflow: hidden;
    box-shadow: var(--mt-shadow);
}

.mattura-exam-header {
    background: linear-gradient(135deg, var(--mt-secondary) 0%, var(--mt-primary) 100%);
    color: #fff;
    padding: 28px 36px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: center;
}

.mattura-exam-header__logo {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.mattura-exam-header__nivo {
    background: rgba(255,255,255,.18);
    border-radius: 20px;
    padding: 4px 14px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
}

.mattura-exam-header__meta {
    grid-column: 1 / -1;
    display: flex;
    gap: 20px;
    font-size: 14px;
    opacity: .9;
    flex-wrap: wrap;
}

.mattura-kalk-badge {
    background: rgba(255,255,255,.15);
    border-radius: 12px;
    padding: 2px 10px;
}

.mattura-kalk-badge--no {
    background: rgba(255,100,100,.2);
}

.mattura-navodila {
    background: var(--mt-light);
    border-left: 4px solid var(--mt-primary);
    padding: 18px 28px;
    font-size: 14px;
    line-height: 1.7;
    color: var(--mt-text);
}

.mattura-del {
    padding: 24px 36px;
    border-top: 1px solid var(--mt-border);
}

.mattura-del__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.mattura-del__header h2 {
    color: var(--mt-primary);
    font-size: 18px;
    margin: 0;
    border: none;
}

.mattura-del__tocke {
    background: var(--mt-primary);
    color: #fff;
    border-radius: 20px;
    padding: 4px 14px;
    font-size: 13px;
    font-weight: 600;
}

.mattura-naloga {
    margin-bottom: 24px;
    padding: 18px 20px;
    background: #fafffe;
    border: 1px solid var(--mt-border);
    border-radius: var(--mt-radius);
}

.mattura-naloga__header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.mattura-naloga__stevilka {
    width: 30px;
    height: 30px;
    background: var(--mt-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
}

.mattura-naloga__tocke {
    background: var(--mt-light);
    color: var(--mt-text);
    border-radius: 12px;
    padding: 2px 10px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid var(--mt-border);
}

.mattura-naloga__besedilo {
    font-size: 15px;
    line-height: 1.8;
    color: #2d3748;
}

.mattura-odgovor {
    margin-top: 16px;
    font-size: 13px;
    color: #666;
}

.mattura-odgovor--kratka .mattura-odgovor__linija {
    border-bottom: 2px solid var(--mt-border);
    margin-top: 8px;
    height: 32px;
}

.mattura-odgovor--strukturirana .mattura-odgovor__prostor {
    border: 1px dashed var(--mt-border);
    border-radius: 4px;
    margin-top: 8px;
    min-height: 100px;
    background: #fefffe;
}

.mattura-exam-footer {
    background: var(--mt-light);
    border-top: 1px solid var(--mt-border);
    padding: 14px 36px;
    font-size: 12px;
    color: #888;
    text-align: center;
}

.mattura-empty {
    color: #aaa;
    font-style: italic;
    padding: 20px;
    text-align: center;
}

/* ---- GENERATOR (frontend) ---- */
.mattura-generator {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    border: 2px solid var(--mt-primary);
    border-radius: var(--mt-radius);
    overflow: hidden;
    box-shadow: var(--mt-shadow);
}

.mattura-generator__header {
    background: linear-gradient(135deg, var(--mt-secondary) 0%, var(--mt-primary) 100%);
    color: #fff;
    padding: 24px 28px;
}

.mattura-generator__header h2 {
    color: #fff;
    margin: 0 0 6px;
    font-size: 20px;
    border: none;
}

.mattura-generator__header p {
    margin: 0;
    opacity: .85;
    font-size: 14px;
}

.mattura-generator__form {
    padding: 28px;
}

.mattura-field-group {
    margin-bottom: 20px;
}

.mattura-field-group label {
    display: block;
    font-weight: 600;
    color: var(--mt-text);
    margin-bottom: 8px;
}

.mattura-choice-btns {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.mattura-choice {
    padding: 8px 16px;
    border: 2px solid var(--mt-border);
    border-radius: 20px;
    background: #fff;
    color: var(--mt-text);
    cursor: pointer;
    font-size: 14px;
    transition: all .2s;
}

.mattura-choice:hover {
    border-color: var(--mt-primary);
    color: var(--mt-primary);
}

.mattura-choice.active {
    background: var(--mt-primary);
    border-color: var(--mt-primary);
    color: #fff;
}

.mattura-btn-main {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--mt-primary) 0%, var(--mt-secondary) 100%);
    color: #fff;
    border: none;
    border-radius: var(--mt-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 0.5px;
    transition: opacity .2s;
}

.mattura-btn-main:hover { opacity: .9; }
.mattura-btn-main:disabled { opacity: .6; cursor: default; }

.mattura-success, .mattura-error {
    margin: 16px 28px 0;
    padding: 12px 16px;
    border-radius: var(--mt-radius);
    font-size: 14px;
}

.mattura-success { background: #eff6ff; color: #1e3a8a; border: 1px solid #bfdbfe; }
.mattura-error   { background: #fff5f5; color: #9b2c2c; border: 1px solid #fed7d7; }

/* ---- REZULTAT GENERIRANJA (frontend) ---- */
.mattura-msg {
    margin: 16px 0;
    padding: 12px 18px;
    border-radius: var(--mt-radius, 8px);
    font-size: 14px;
    font-weight: 600;
}
.mattura-msg--success {
    background: #eff6ff;
    color: #1e3a8a;
    border: 1px solid #bfdbfe;
}
.mattura-msg--error {
    background: #fff5f5;
    color: #9b2c2c;
    border: 1px solid #fed7d7;
}

.mattura-result-pola {
    margin-top: 20px;
    border: 2px solid var(--mt-primary, #3b5bdb);
    border-radius: var(--mt-radius, 8px);
    overflow: hidden;
    background: #fff;
}

.mattura-result-pola__header {
    background: linear-gradient(135deg, var(--mt-secondary, #1e3a8a) 0%, var(--mt-primary, #3b5bdb) 100%);
    color: #fff;
    padding: 16px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.mattura-result-pola__header h3 {
    color: #fff;
    margin: 0;
    font-size: 18px;
    border: none;
}

.mattura-result-pola__meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.mattura-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: rgba(255,255,255,.2);
    color: #fff;
}

.mattura-badge--kalk   { background: rgba(20,184,166,.3); }
.mattura-badge--nokalk { background: rgba(239,68,68,.3); }

.mattura-result-navodila {
    background: #eff6ff;
    border-bottom: 1px solid #bfdbfe;
    padding: 14px 22px;
    font-size: 13px;
    line-height: 1.7;
    color: #1e3a8a;
}

.mattura-result-del {
    border-top: 1px solid #e2e8f0;
    padding: 18px 22px;
}

.mattura-result-del__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.mattura-result-del__header h4 {
    color: var(--mt-primary, #3b5bdb);
    margin: 0;
    font-size: 15px;
}

.mattura-tocke-badge {
    background: var(--mt-primary, #3b5bdb);
    color: #fff;
    border-radius: 20px;
    padding: 3px 12px;
    font-size: 12px;
    font-weight: 700;
}

.mattura-result-naloga {
    background: #fafffe;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    padding: 14px 16px;
    margin-bottom: 12px;
}

.mattura-result-naloga__header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.mattura-result-naloga__st {
    width: 28px;
    height: 28px;
    background: var(--mt-primary, #3b5bdb);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 12px;
    flex-shrink: 0;
}

.mattura-result-naloga__tocke {
    font-size: 12px;
    color: #666;
    font-weight: 600;
}

.mattura-result-naloga__besedilo {
    font-size: 14px;
    line-height: 1.7;
    color: #2d3748;
    margin-bottom: 10px;
}

.mattura-podnaloge {
    margin: 8px 0 10px 18px;
    padding: 0;
    font-size: 13px;
    line-height: 1.7;
}

.mattura-podnaloge li {
    margin-bottom: 6px;
}

.mattura-prostor {
    border-bottom: 2px solid #e2e8f0;
    margin-top: 10px;
}

.mattura-prostor--kratka {
    height: 36px;
}

.mattura-prostor--strukturirana {
    height: 90px;
    border: 1px dashed #cbd5e0;
    border-radius: 4px;
    background: #fafffe;
}

/* ============================================================
   MatTura — MathJax + AI razlagalnik + Izvoz
   ============================================================ */

/* --- Loading spinner --- */
.mt-loading {
    text-align: center; padding: 48px 20px; color: var(--mt-primary, #3b5bdb);
}
.mt-spin {
    width: 42px; height: 42px; margin: 0 auto 14px;
    border: 4px solid var(--mt-border, #bfdbfe);
    border-top-color: var(--mt-primary, #3b5bdb);
    border-radius: 50%;
    animation: mt-spin .8s linear infinite;
}
@keyframes mt-spin { to { transform: rotate(360deg); } }

/* --- Toolbar nad izpitom --- */
.mt-toolbar {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 10px;
    background: var(--mt-light, #eff6ff);
    border: 1px solid var(--mt-border, #bfdbfe);
    border-radius: 8px; padding: 10px 16px; margin-bottom: 16px;
}
.mt-toolbar__title { font-weight: 600; color: var(--mt-primary, #3b5bdb); font-size: 14px; }
.mt-toolbar__btns  { display: flex; gap: 8px; flex-wrap: wrap; }
.mt-export-btn {
    background: var(--mt-primary, #3b5bdb); color: #fff; border: none;
    border-radius: 6px; padding: 7px 14px; font-size: 13px; font-weight: 600;
    cursor: pointer; transition: opacity .2s;
}
.mt-export-btn:hover   { opacity: .85; }
.mt-export-btn:disabled{ opacity: .5; cursor: default; }

/* --- Pola --- */
.mt-pola {
    border: 2px solid var(--mt-primary, #3b5bdb);
    border-radius: 10px; overflow: hidden;
    background: #fff; margin-bottom: 24px;
    box-shadow: 0 2px 12px rgba(13,148,136,.10);
}
.mt-pola__header {
    background: linear-gradient(135deg, var(--mt-secondary, #1e3a8a) 0%, var(--mt-primary, #3b5bdb) 100%);
    color: #fff; padding: 16px 22px;
    display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}
.mt-pola__title { display: flex; align-items: center; gap: 10px; }
.mt-pola__title h3 { color: #fff; margin: 0; font-size: 18px; border: none; }
.mt-nivo-pill {
    background: rgba(255,255,255,.2); border-radius: 20px;
    padding: 2px 10px; font-size: 11px; font-weight: 600; letter-spacing: .5px;
}
.mt-pola__meta { display: flex; gap: 8px; flex-wrap: wrap; }
.mt-badge {
    display: inline-flex; align-items: center;
    padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 600;
    background: rgba(255,255,255,.18); color: #fff;
}
.mt-badge--kalk   { background: rgba(20,184,166,.35); }
.mt-badge--nokalk { background: rgba(239,68,68,.30); }
.mt-navodila {
    background: #eff6ff; border-bottom: 1px solid #bfdbfe;
    padding: 12px 22px; font-size: 13px; line-height: 1.7; color: #1e3a8a;
}

/* --- Del --- */
.mt-del { padding: 18px 22px; border-top: 1px solid #e2e8f0; }
.mt-del__header {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px;
}
.mt-del__header h4 { color: var(--mt-primary, #3b5bdb); margin: 0; font-size: 15px; }
.mt-tocke-pill {
    background: var(--mt-primary, #3b5bdb); color: #fff;
    border-radius: 20px; padding: 3px 12px; font-size: 12px; font-weight: 700;
}

/* --- Naloga --- */
.mt-naloga {
    background: #fafffe; border: 1px solid #e2e8f0;
    border-radius: 8px; padding: 14px 16px; margin-bottom: 14px;
}
.mt-naloga__top {
    display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
}
.mt-naloga__num {
    width: 28px; height: 28px; flex-shrink: 0;
    background: var(--mt-primary, #3b5bdb); color: #fff;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 13px;
}
.mt-naloga__pts { font-size: 12px; color: #888; font-weight: 600; }

/* AI gumb pri nalogi */
.mt-ai-btn {
    margin-left: auto;
    background: transparent;
    border: 1.5px solid var(--mt-accent, #14b8a6);
    color: var(--mt-primary, #3b5bdb);
    border-radius: 20px; padding: 3px 12px; font-size: 12px; font-weight: 600;
    cursor: pointer; transition: all .2s; white-space: nowrap;
}
.mt-ai-btn:hover {
    background: var(--mt-accent, #14b8a6); color: #fff;
}

.mt-naloga__besedilo {
    font-size: 14.5px; line-height: 1.8; color: #1a202c; margin-bottom: 10px;
}

/* Podnaloge */
.mt-podnaloge { margin: 6px 0 8px 4px; padding: 0; list-style: none; counter-reset: pd; }
.mt-podnaloga {
    display: flex; align-items: baseline; gap: 6px;
    margin-bottom: 8px; font-size: 14px; line-height: 1.7;
}
.mt-pd-pts { font-size: 11px; color: #999; white-space: nowrap; }

/* Prostori za pisanje */
.mt-prostor {
    border-bottom: 1.5px solid #cbd5e0; margin-top: 8px; height: 30px;
}
.mt-prostor--str {
    border: 1px dashed #cbd5e0; border-radius: 4px;
    margin-top: 8px; min-height: 80px; background: #fefffe;
}

/* ============================================================
   AI RAZLAGALNIK PANEL
   ============================================================ */
.mt-ai-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.35); z-index: 9998;
    backdrop-filter: blur(2px);
}
.mt-ai-box {
    position: fixed; right: 0; top: 0; bottom: 0;
    width: min(420px, 100vw);
    background: #fff; z-index: 9999;
    display: flex; flex-direction: column;
    box-shadow: -4px 0 32px rgba(0,0,0,.18);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
.mt-ai-box__header {
    background: linear-gradient(135deg, var(--mt-secondary, #1e3a8a) 0%, var(--mt-primary, #3b5bdb) 100%);
    color: #fff; padding: 14px 16px;
    display: flex; align-items: center; gap: 10px;
    font-weight: 700; font-size: 15px;
}
.mt-ai-box__header small {
    flex: 1; font-size: 11px; opacity: .75; font-weight: 400;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.mt-ai-close {
    background: rgba(255,255,255,.15); border: none; color: #fff;
    width: 28px; height: 28px; border-radius: 50%;
    cursor: pointer; font-size: 14px; line-height: 1;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.mt-ai-close:hover { background: rgba(255,255,255,.3); }

.mt-ai-messages {
    flex: 1; overflow-y: auto; padding: 16px;
    display: flex; flex-direction: column; gap: 10px;
    background: #f8fffe;
}
.mt-ai-msg {
    max-width: 88%; padding: 10px 14px;
    border-radius: 12px; font-size: 13.5px; line-height: 1.65;
    word-break: break-word;
}
.mt-ai-msg--bot {
    align-self: flex-start;
    background: #fff; border: 1px solid #e2e8f0;
    border-bottom-left-radius: 3px;
}
.mt-ai-msg--user {
    align-self: flex-end;
    background: var(--mt-primary, #3b5bdb); color: #fff;
    border-bottom-right-radius: 3px;
}
.mt-ai-msg--error {
    align-self: flex-start;
    background: #fff5f5; border: 1px solid #fed7d7; color: #c53030;
}
.mt-ai-msg code {
    background: rgba(0,0,0,.07); border-radius: 3px; padding: 1px 5px; font-size: 12px;
}
.mt-ai-msg--user code { background: rgba(255,255,255,.2); }

.mt-ai-input-row {
    display: flex; gap: 8px; padding: 12px;
    border-top: 1px solid #e2e8f0; background: #fff;
}
#mt-ai-input {
    flex: 1; border: 1.5px solid #e2e8f0; border-radius: 8px;
    padding: 8px 12px; font-size: 13px; resize: none;
    font-family: inherit; line-height: 1.5;
    transition: border-color .2s;
}
#mt-ai-input:focus { outline: none; border-color: var(--mt-primary, #3b5bdb); }
#mt-ai-send {
    background: var(--mt-primary, #3b5bdb); color: #fff; border: none;
    border-radius: 8px; padding: 8px 16px; font-size: 13px; font-weight: 600;
    cursor: pointer; white-space: nowrap; transition: opacity .2s;
}
#mt-ai-send:hover   { opacity: .85; }
#mt-ai-send:disabled{ opacity: .5; cursor: default; }

/* ============================================================
   Sporočila
   ============================================================ */
.mt-msg { padding: 12px 18px; border-radius: 8px; font-size: 14px; margin-bottom: 12px; }
.mt-msg--err {
    background: #fff5f5; color: #9b2c2c; border: 1px solid #fed7d7;
}
.mt-empty { color: #aaa; font-style: italic; padding: 16px; text-align: center; font-size: 13px; }

/* ============================================================
   MathJax — stilni popravki
   ============================================================ */
mjx-container { overflow-x: auto; max-width: 100%; }
mjx-container[display="true"] { display: block; margin: 8px 0; text-align: center; }

/* ============================================================
   Popravki vidljivosti in LaTeX
   ============================================================ */

/* Alinee — temnejše (bolj vidne) */
.mt-podnaloge li,
.mt-podnaloga {
    color: #1a202c !important;
}
.mt-pd-oznaka {
    color: #1e3a8a !important;
    font-weight: 700;
    min-width: 20px;
}
.mt-pd-pts {
    color: #3b5bdb !important;
    font-weight: 600;
}
.mt-pd-txt {
    color: #1a202c !important;
}

/* LaTeX v nalogi — zagotovi da se prikaže pravilno */
.mt-naloga__besedilo mjx-container,
.mt-podnaloga mjx-container,
.mt-ai-msg mjx-container {
    display: inline !important;
}
.mt-naloga__besedilo mjx-container[display="true"],
.mt-podnaloga mjx-container[display="true"] {
    display: block !important;
    margin: 6px 0;
    text-align: center;
}

/* ============================================================
   Matematična tipkovnica v AI chatu
   ============================================================ */
.mt-math-bar {
    padding: 6px 10px;
    border-bottom: 1px solid #e2e8f0;
    background: #f8fffe;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.mt-math-bar__toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.mt-math-toggle-btn {
    background: transparent;
    border: 1.5px solid var(--mt-border, #bfdbfe);
    border-radius: 6px;
    color: var(--mt-primary, #3b5bdb);
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 400;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all .18s;
}
.mt-math-toggle-btn:hover,
.mt-math-toggle-btn.active {
    background: var(--mt-primary, #3b5bdb);
    color: #fff;
}
.mt-math-panel {
    display: none;
    flex-direction: column;
    gap: 3px;
}
.mt-math-panel.open { display: flex; }

.mt-math-row {
    display: flex;
    align-items: center;
    gap: 3px;
    flex-wrap: wrap;
}
.mt-math-lbl {
    font-size: 10px;
    color: #888;
    font-weight: 600;
    min-width: 58px;
    text-transform: uppercase;
    letter-spacing: .3px;
}
.mt-mpb {
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 5px;
    padding: 3px 7px;
    font-size: 12px;
    cursor: pointer;
    color: #2d3748;
    font-family: 'Times New Roman', Georgia, serif;
    transition: all .15s;
    white-space: nowrap;
}
.mt-mpb:hover {
    background: var(--mt-light, #eff6ff);
    border-color: var(--mt-primary, #3b5bdb);
    color: var(--mt-primary, #3b5bdb);
}
.mt-mpb:active {
    background: var(--mt-primary, #3b5bdb);
    color: #fff;
}

/* VR puščica za višjo raven */
.mt-vr-arrow {
    color: var(--mt-primary, #3b5bdb);
    font-weight: 700;
    font-size: 13px;
    margin-right: 4px;
    flex-shrink: 0;
}
.mt-podnaloga--vr {
    background: rgba(13,148,136,.04);
    border-radius: 4px;
    padding: 2px 6px;
    margin-left: -6px;
}


/* ============================================================
   Desmos grafi
   ============================================================ */
.mt-desmos-wrap { margin: 8px 0; }
.mt-desmos-btn {
    background: var(--mt-primary, #3b5bdb);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 5px 14px;
    font-size: 12px;
    font-weight: 400;
    cursor: pointer;
    transition: opacity .18s;
}
.mt-desmos-btn:hover { opacity: .85; }
.mt-desmos-btn:disabled { opacity: .6; cursor: wait; }
.mt-desmos-container {
    border: 1.5px solid var(--mt-border, #bfdbfe);
    border-radius: 8px;
    overflow: hidden;
}

/* ============================================================
   Matematični editor v2 — tabs + preview
   ============================================================ */
.mt-math-tabs {
    display: flex;
    gap: 2px;
    padding: 4px 0 2px;
    border-bottom: 1px solid var(--mt-border,#bfdbfe);
    margin-bottom: 6px;
    flex-wrap: wrap;
}
.mt-math-tab {
    background: transparent;
    border: 1px solid var(--mt-border,#bfdbfe);
    border-radius: 5px 5px 0 0;
    border-bottom: none;
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 400;
    cursor: pointer;
    color: #64748b;
    transition: all .15s;
}
.mt-math-tab.active,
.mt-math-tab:hover {
    background: var(--mt-primary,#3b5bdb);
    color: #fff;
    border-color: var(--mt-primary,#3b5bdb);
}
.mt-math-tab-content {
    display: none;
    flex-wrap: wrap;
    gap: 4px;
    padding: 2px 0 4px;
}
.mt-math-tab-content.active { display: flex; }

.mt-mpb {
    background: #fff;
    border: 1.5px solid var(--mt-border,#bfdbfe);
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 15px;
    cursor: pointer;
    color: #1e3a8a;
    font-family: 'Times New Roman', Georgia, serif;
    transition: all .15s;
    white-space: nowrap;
    min-width: 38px;
    text-align: center;
}
.mt-mpb:hover {
    background: var(--mt-light,#eff6ff);
    border-color: var(--mt-primary,#3b5bdb);
    color: var(--mt-primary,#3b5bdb);
    transform: scale(1.08);
}
.mt-mpb:active {
    background: var(--mt-primary,#3b5bdb);
    color: #fff;
    transform: scale(0.96);
}

/* MathJax live preview */
.mt-math-preview {
    margin-top: 6px;
    padding: 6px 10px;
    background: var(--mt-light,#eff6ff);
    border-radius: 6px;
    border: 1px solid var(--mt-border,#bfdbfe);
    font-size: 13px;
    min-height: 32px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.mt-math-preview__label {
    font-size: 10px;
    font-weight: 700;
    color: var(--mt-primary,#3b5bdb);
    text-transform: uppercase;
    letter-spacing: .5px;
    flex-shrink: 0;
}

/* ── QBank gumb ── */
.mt-gen-btn--qbank {
    background: linear-gradient(135deg, #0e7490 0%, #155e75 100%);
    margin-left: 8px;
}
.mt-gen-btn--qbank:hover { opacity: .88; }