/* BIAB Core component styles. Uses Box Network theme tokens with fallbacks. */
.biab-hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
.biab-small { font-size: .85rem; color: var(--muted, #64748b); }
.biab-panel { background: #fff; border: 1px solid var(--line, #e2e8f0); border-radius: var(--radius, 14px); padding: 1.5rem; box-shadow: var(--shadow, 0 8px 24px rgba(15,23,42,.06)); }
.biab-alert { padding: .7rem 1rem; border-radius: 8px; font-size: .95rem; }
.biab-alert--bad { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.biab-alert--good { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.biab-badge { display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; padding: .2rem .6rem; border-radius: 999px; background: var(--paper-3, #f1f5f9); color: var(--ink-2, #334155); vertical-align: middle; }
.biab-badge--pro { background: var(--box, #2563eb); color: #fff; }
.biab-progress { height: 10px; background: var(--paper-3, #f1f5f9); border-radius: 999px; overflow: hidden; margin: .5rem 0; }
.biab-progress span { display: block; height: 100%; background: linear-gradient(90deg, var(--box, #2563eb), var(--box-600, #1d4ed8)); border-radius: 999px; transition: width .4s; }

/* Opt-in */
.biab-optin { background: linear-gradient(135deg, var(--box-ink, #0b1220), color-mix(in srgb, var(--box, #2563eb) 55%, var(--box-ink, #0b1220))); color: #e2e8f0; border-radius: calc(var(--radius, 14px) + 4px); padding: clamp(1.4rem, 4vw, 2.4rem); margin: 2rem 0; display: grid; grid-template-columns: minmax(0,1.1fr) minmax(0,1fr); gap: 1.5rem; align-items: center; box-shadow: var(--shadow-lg, 0 20px 50px rgba(15,23,42,.14)); }
.biab-optin h3 { color: #fff; margin: 0 0 .3rem; font-size: 1.35rem; }
.biab-optin p { color: #cbd5e1; margin: 0; }
.biab-optin__copy { display: flex; gap: 1rem; align-items: flex-start; }
.biab-optin__copy svg { flex-shrink: 0; }
.biab-optin__form { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: .6rem; }
.biab-optin__form input { background: rgba(255,255,255,.95); border: 0; }
.biab-optin__form button, .biab-optin__form .biab-optin__msg, .biab-optin__form .biab-small { grid-column: 1 / -1; }
.biab-optin__form button { background: #fff; color: var(--box-ink, #0b1220); border-color: #fff; }
.biab-optin__form button:hover { background: var(--box-50, #eff6ff); color: var(--box-ink, #0b1220); border-color: var(--box-50, #eff6ff); }
.biab-optin .biab-small, .biab-optin .biab-small a { color: #94a3b8; }
.biab-optin__msg { min-height: 0; margin: 0; font-weight: 600; }
.biab-optin__msg.is-good { color: #86efac; }
.biab-optin__msg.is-good a { color: #fff; }
.biab-optin__msg.is-bad { color: #fca5a5; }
.biab-optin--compact { grid-template-columns: minmax(0,1fr); padding: 1.2rem; margin: 0 0 1.2rem; gap: 1rem; }
.biab-optin--compact h3 { font-size: 1.05rem; }
.biab-optin--compact p { font-size: .88rem; }
.biab-optin--compact .biab-optin__form { grid-template-columns: minmax(0,1fr); }
.biab-optin--compact .biab-optin__form input[name=name] { display: none; }
.section .biab-optin { margin: 0; }
@media (max-width: 760px) { .biab-optin { grid-template-columns: minmax(0,1fr); } .biab-optin__form { grid-template-columns: minmax(0,1fr); } }
.js-biab-contact .biab-optin__msg.is-good { color: var(--good, #16a34a); }
.js-biab-contact .biab-optin__msg.is-bad { color: var(--bad, #dc2626); }

/* Paywall & teaser */
.biab-teaser { position: relative; max-height: 320px; overflow: hidden; }
.biab-teaser::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 140px; background: linear-gradient(transparent, var(--paper, #fff)); }
.biab-paywall { text-align: center; border: 2px dashed color-mix(in srgb, var(--box, #2563eb) 40%, #fff); background: var(--box-50, #eff6ff); border-radius: var(--radius, 14px); padding: 2rem 1.5rem; margin: 1rem 0 2rem; }
.biab-paywall__icon { font-size: 2.2rem; }
.biab-paywall h3 { margin: .3rem 0 .5rem; }

/* Auth */
.biab-auth { max-width: 480px; }
.grid .biab-auth { max-width: none; }
.biab-auth form p, .biab-form p { margin-bottom: 1rem; }
.biab-auth input[type=text], .biab-auth input[type=password], .biab-auth input[type=email] { width: 100%; }
.biab-auth .login-remember label { display: inline; font-weight: 400; }
.biab-auth .login-submit input { width: auto; }
.biab-auth__links { font-size: .9rem; margin-top: .8rem; }

/* Account */
.biab-account__head { display: flex; gap: 1rem; align-items: center; margin-bottom: 1.5rem; }
.biab-account__head img { border-radius: 50%; }
.biab-account__head h2 { margin: 0; }
.biab-account__head p { margin: 0; }
.biab-upsell { display: flex; justify-content: space-between; gap: 1rem; align-items: center; flex-wrap: wrap; background: linear-gradient(120deg, var(--box-600, #1d4ed8), var(--box, #2563eb)); color: #fff; border-radius: var(--radius, 14px); padding: 1.3rem 1.5rem; margin: 1.5rem 0; }
.biab-upsell h3 { color: #fff; margin: 0; }
.biab-upsell p { margin: 0; color: rgba(255,255,255,.85); }

/* Pricing */
.biab-pricing { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1.2rem; margin: 2rem 0 3rem; align-items: stretch; }
@media (max-width: 900px) { .biab-pricing { grid-template-columns: minmax(0,1fr); } }
.biab-plan { background: #fff; border: 1px solid var(--line, #e2e8f0); border-radius: calc(var(--radius, 14px) + 4px); padding: 1.8rem 1.5rem; position: relative; display: flex; flex-direction: column; box-shadow: var(--shadow, none); }
.biab-plan.is-hot { border: 2px solid var(--box, #2563eb); box-shadow: var(--shadow-lg, none); transform: translateY(-6px); }
.biab-plan__flag { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--box, #2563eb); color: #fff; font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; padding: .3rem .8rem; border-radius: 999px; white-space: nowrap; }
.biab-plan h3 { margin: 0 0 .3rem; }
.biab-plan__price { margin: .3rem 0 0; }
.biab-plan__price strong { font-family: var(--font-head, inherit); font-size: 2.6rem; line-height: 1; }
.biab-plan__price span { color: var(--muted, #64748b); }
.biab-plan__alt { font-size: .88rem; color: var(--muted, #64748b); margin: .2rem 0 0; }
.biab-plan ul { flex: 1; margin: 1rem 0; }
.biab-plan li { font-size: .94rem; }
.biab-plan .btn { width: 100%; }

/* Course */
.biab-course-progress { display: flex; gap: 1.5rem; align-items: center; justify-content: space-between; margin-bottom: 2rem; }
.biab-course-progress > div { flex: 1; }
.biab-module { border: 1px solid var(--line, #e2e8f0); border-radius: var(--radius, 14px); margin-bottom: 1.4rem; overflow: hidden; background: #fff; }
.biab-module header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1rem 1.3rem; background: var(--paper-2, #f8fafc); border-bottom: 1px solid var(--line, #e2e8f0); }
.biab-module h2 { margin: 0; font-size: 1.15rem; padding: 0; }
ol.biab-lessons { list-style: none; margin: 0 !important; padding: 0 !important; }
.biab-lessons li { display: flex; gap: 1rem; align-items: flex-start; padding: 1rem 1.3rem; border-bottom: 1px solid var(--line, #e2e8f0); margin: 0 !important; }
.biab-lessons li:last-child { border-bottom: 0; }
.biab-lessons li > div { flex: 1; }
.biab-lessons a { font-family: var(--font-head, inherit); font-weight: 600; color: var(--ink, #0f172a); text-decoration: none; font-size: 1.02rem; }
.biab-lessons a:hover { color: var(--box-600, #1d4ed8); }
.biab-lessons p { margin: .2rem 0 0; font-size: .9rem; color: var(--muted, #64748b); }
.biab-lessons__n { width: 32px; height: 32px; border-radius: 50%; background: var(--box-50, #eff6ff); color: var(--box-600, #1d4ed8); display: grid; place-items: center; font-weight: 700; font-size: .9rem; flex-shrink: 0; }
.biab-lessons li.is-done .biab-lessons__n { background: var(--good, #16a34a); color: #fff; }
.biab-lessons__meta { font-size: .82rem; color: var(--muted, #64748b); white-space: nowrap; }
.biab-objectives { background: var(--box-50, #eff6ff); border-radius: var(--radius-sm, 8px); padding: 1rem 1.2rem; margin-bottom: 1.5rem; }
.biab-objectives ul { margin: .5rem 0 0; }
.biab-video { margin-bottom: 2rem; border-radius: var(--radius, 14px); overflow: hidden; }
.biab-video iframe { width: 100%; aspect-ratio: 16/9; height: auto; display: block; }
.biab-video--ph { aspect-ratio: 16/9; background: linear-gradient(135deg, var(--box-ink, #0b1220), color-mix(in srgb, var(--box, #2563eb) 60%, var(--box-ink, #0b1220))); display: grid; place-items: center; color: #cbd5e1; text-align: center; padding: 1rem; }
.biab-video--ph span { display: inline-grid; place-items: center; width: 68px; height: 68px; border-radius: 50%; background: rgba(255,255,255,.14); font-size: 1.6rem; color: #fff; margin-bottom: .6rem; }
.biab-video--ph p { margin: 0; }
.biab-script pre { white-space: pre-wrap; font-size: .88rem; }
.biab-complete { margin: 2rem 0 1rem; padding-top: 1.5rem; border-top: 1px solid var(--line, #e2e8f0); }
.js-biab-complete.is-done { background: var(--good, #16a34a); border-color: var(--good, #16a34a); }
.biab-outline h3 { font-size: .85rem; letter-spacing: .04em; text-transform: uppercase; color: var(--muted, #64748b); margin: 1rem 0 .4rem; }
.biab-outline ol { list-style: none; padding: 0; margin: 0; counter-reset: none; }
.biab-outline li { padding: .3rem 0 .3rem 1.4rem !important; position: relative; font-size: .9rem; border: 0 !important; }
.biab-outline li::before { content: "○"; position: absolute; left: 0; color: var(--muted, #64748b); }
.biab-outline li.is-done::before { content: "✓"; color: var(--good, #16a34a); font-weight: 700; }
.biab-outline li.is-locked::before { content: "🔒"; font-size: .7rem; top: .45rem; }
.biab-outline li.is-current a { color: var(--box-600, #1d4ed8); font-weight: 700; }

/* Pairs */
.biab-pairs { margin: 2.5rem 0; padding: 1.3rem; border: 1px solid var(--line, #e2e8f0); border-radius: var(--radius, 14px); background: var(--paper-2, #f8fafc); }
.biab-pairs h3 { margin: 0 0 .8rem; font-size: 1.05rem; }
.biab-pairs__list { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: .8rem; }
.biab-pair { display: flex; gap: .7rem; align-items: flex-start; padding: .8rem; background: #fff; border: 1px solid var(--line, #e2e8f0); border-left: 4px solid var(--nb, var(--box)); border-radius: 10px; text-decoration: none; color: var(--ink-2, #334155); font-size: .88rem; line-height: 1.45; transition: transform .15s; }
.biab-pair:hover { transform: translateY(-2px); color: var(--ink, #0f172a); }
.biab-pair svg { flex-shrink: 0; }
.biab-pair strong { display: block; color: var(--ink, #0f172a); font-family: var(--font-head, inherit); }
.biab-pair em { color: var(--muted, #64748b); font-style: normal; }

/* ==========================================================================
   Tools
   ========================================================================== */
.biab-tool, .biab-fun { background: #fff; border: 1px solid var(--line, #e2e8f0); border-radius: calc(var(--radius, 14px) + 4px); margin: 2rem 0; box-shadow: var(--shadow, none); overflow: hidden; scroll-margin-top: 100px; }
.biab-tool__head, .biab-fun__head { display: flex; gap: 1rem; align-items: center; padding: 1.2rem 1.5rem; background: linear-gradient(120deg, var(--box-50, #eff6ff), #fff); border-bottom: 1px solid var(--line, #e2e8f0); }
.biab-tool__head h3, .biab-fun__head h3 { margin: 0; font-size: 1.2rem; }
.biab-tool__head p, .biab-fun__head p { margin: .1rem 0 0; font-size: .92rem; color: var(--muted, #64748b); }
.biab-tool__icon { font-size: 1.7rem; width: 54px; height: 54px; flex-shrink: 0; display: grid; place-items: center; background: #fff; border-radius: 14px; box-shadow: var(--shadow, none); }
.biab-tool__body, .biab-fun__body { padding: 1.5rem; }
.biab-tool label, .biab-fun label { font-size: .88rem; }
.bt-row { display: flex; gap: .6rem; flex-wrap: wrap; margin-bottom: 1rem; }
.bt-row input { flex: 1; min-width: 200px; }
.bt-field { margin: 0 0 .9rem; }
.bt-field small { display: block; color: var(--muted, #64748b); font-size: .8rem; margin-top: .25rem; }
.bt-cols { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 1.5rem; }
.bt-cols--2 { grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: .8rem; }
.bt-cols--3 { grid-template-columns: repeat(3, minmax(0,1fr)); gap: .8rem; }
@media (max-width: 760px) { .bt-cols { grid-template-columns: minmax(0,1fr); } .bt-cols--3 { grid-template-columns: minmax(0,1fr) minmax(0,1fr); } }
.bt-label { font-family: var(--font-head, inherit); font-weight: 600; font-size: .85rem; letter-spacing: .04em; text-transform: uppercase; color: var(--muted, #64748b); margin: .8rem 0 .5rem; }
.bt-code { background: var(--box-ink, #0b1220); color: #e2e8f0; border-radius: 10px; padding: 1rem; font-size: .8rem; line-height: 1.55; white-space: pre-wrap; word-break: break-all; max-height: 420px; overflow: auto; margin: 0 0 .7rem; }
.bt-msg { padding: .7rem 1rem; border-radius: 10px; background: var(--paper-2, #f8fafc); border: 1px solid var(--line, #e2e8f0); font-size: .95rem; }
.bt-msg.is-good { background: #f0fdf4; border-color: #bbf7d0; }
.bt-msg.is-bad { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.bt-group { margin: 1.5rem 0 .6rem; font-size: 1rem; }
.bt-group small { color: var(--muted, #64748b); font-weight: 400; }
.bt-chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: .8rem; }
.bt-chip { display: inline-block; font: inherit; font-size: .86rem; padding: .35rem .75rem; border-radius: 999px; background: var(--paper-3, #f1f5f9); border: 1px solid var(--line, #e2e8f0); color: var(--ink-2, #334155); cursor: pointer; line-height: 1.3; }
.bt-chip:hover, .bt-chip.is-on { background: var(--box, #2563eb); border-color: var(--box, #2563eb); color: #fff; }
.bt-checks { list-style: none; padding: 0 !important; margin: .6rem 0 1rem; font-size: .92rem; }
.bt-checks li { padding: .15rem 0; }
.bt-checkgrid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: .3rem .8rem; margin-bottom: 1rem; }
.bt-checkgrid label { font-weight: 400; font-size: .9rem; display: flex; gap: .4rem; align-items: flex-start; }
.bt-checkgrid input { margin-top: .35rem; }
@media (max-width: 520px) { .bt-checkgrid { grid-template-columns: minmax(0,1fr); } }
.bt-meter { height: 6px; background: var(--paper-3, #f1f5f9); border-radius: 999px; overflow: hidden; margin: -.5rem 0 1rem; }
.bt-meter span { display: block; height: 100%; width: 0; transition: width .2s, background .2s; }
.bt-serp { border: 1px solid var(--line, #e2e8f0); border-radius: 12px; padding: 1rem 1.1rem; font-family: arial, sans-serif; background: #fff; margin-bottom: .5rem; }
.bt-serp__site { display: flex; align-items: center; gap: .5rem; font-size: 13px; color: #4d5156; margin-bottom: .2rem; }
.bt-serp__fav { width: 18px; height: 18px; border-radius: 50%; background: var(--box, #2563eb); display: inline-block; }
.bt-serp__title { display: block; color: #1a0dab; font-size: 19px; line-height: 1.3; margin-bottom: .2rem; }
.bt-serp__desc { color: #4d5156; font-size: 14px; line-height: 1.55; }
.bt-summary { display: flex; gap: 1.5rem; align-items: center; background: var(--paper-2, #f8fafc); border: 1px solid var(--line, #e2e8f0); border-radius: 14px; padding: 1.2rem; margin-bottom: 1rem; }
.bt-summary h4 { margin: 0 0 .2rem; }
.bt-summary p { margin: .3rem 0; }
@media (max-width: 600px) { .bt-summary { flex-direction: column; align-items: flex-start; } }
.bt-ring { --p: 0; --c: var(--box, #2563eb); width: 108px; height: 108px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center; background: radial-gradient(closest-side, #fff 78%, transparent 80% 100%), conic-gradient(var(--c) calc(var(--p) * 1%), var(--paper-3, #f1f5f9) 0); position: relative; }
.bt-ring span { font-family: var(--font-head, inherit); font-weight: 700; font-size: 1.9rem; line-height: 1; }
.bt-ring small { position: absolute; bottom: 24px; font-size: .7rem; color: var(--muted, #64748b); }
.biab-tool tr.is-bad td { background: #fef2f2; }
.biab-tool tr.is-warn td { background: #fffbeb; }
.biab-tool td { font-size: .9rem; }
.bt-kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px,1fr)); gap: .6rem; margin-bottom: 1rem; }
.bt-kpis > div { background: var(--paper-2, #f8fafc); border: 1px solid var(--line, #e2e8f0); border-radius: 12px; padding: .8rem; }
.bt-kpis small { display: block; font-size: .78rem; color: var(--muted, #64748b); }
.bt-kpis strong { font-family: var(--font-head, inherit); font-size: 1.35rem; }
.bt-kpis .is-main { background: var(--box-50, #eff6ff); border-color: var(--box, #2563eb); }
.bt-kpis .is-main strong { color: var(--box-600, #1d4ed8); }
.bt-kpis--2 { grid-template-columns: minmax(0,1fr) minmax(0,1fr); }
.bt-doc { border: 1px solid var(--line, #e2e8f0); border-radius: 12px; padding: 1.2rem; max-height: 560px; overflow: auto; background: #fff; font-size: .92rem; }
.bt-doc h3 { margin-top: 0; }
.bt-doc h4 { margin: 1.2rem 0 .4rem; }
.bt-checklist { list-style: none; padding: 0 !important; margin: 0; flex: 1; }
.bt-checklist li { padding: .35rem 0; border-bottom: 1px dashed var(--line, #e2e8f0); }
.bt-checklist label { font-weight: 400; display: flex; gap: .6rem; align-items: flex-start; margin: 0; cursor: pointer; font-size: .95rem; }
.bt-checklist input { margin-top: .35rem; }
.bt-geo-ring { display: flex; flex-direction: column; align-items: center; align-self: flex-start; }
.bt-plist .biab-prompt { margin: .8rem 0; }
.bt-ai { margin-top: 1.2rem; padding-top: 1rem; border-top: 1px dashed var(--line, #e2e8f0); }
.bt-warn { color: var(--warn, #d97706); }

/* ==========================================================================
   Quizzes & games
   ========================================================================== */
.biab-fun h4 { margin: .4rem 0 1rem; font-size: 1.2rem; }
.bf-progress { height: 6px; background: var(--paper-3, #f1f5f9); border-radius: 999px; overflow: hidden; margin-bottom: .8rem; }
.bf-progress span { display: block; height: 100%; background: var(--box, #2563eb); transition: width .3s; }
.bf-count { font-size: .82rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; color: var(--muted, #64748b); margin: 0 0 .3rem; }
.bf-opts { display: grid; gap: .6rem; }
.bf-opt, .ss-opt { text-align: left; font: inherit; font-size: 1rem; padding: .85rem 1.1rem; border: 1.5px solid var(--line, #e2e8f0); border-radius: 12px; background: #fff; cursor: pointer; transition: border-color .15s, background .15s, transform .1s; color: var(--ink, #0f172a); line-height: 1.4; }
.bf-opt:hover:not(:disabled), .ss-opt:hover:not(:disabled) { border-color: var(--box, #2563eb); background: var(--box-50, #eff6ff); }
.bf-opt:active:not(:disabled) { transform: scale(.99); }
.bf-opt:disabled, .ss-opt:disabled { cursor: default; }
.bf-opt.is-right, .ss-opt.is-right { border-color: var(--good, #16a34a); background: #f0fdf4; }
.bf-opt.is-wrong, .ss-opt.is-wrong { border-color: var(--bad, #dc2626); background: #fef2f2; }
.bf-opt.is-picked { border-color: var(--box, #2563eb); background: var(--box-50, #eff6ff); }
.bf-explain { margin-top: 1rem; }
.bf-result { background: var(--paper-2, #f8fafc); border: 1px solid var(--line, #e2e8f0); border-left: 5px solid var(--nb, var(--box, #2563eb)); border-radius: 12px; padding: 1.2rem 1.4rem; }
.bf-result h4 { margin-top: 0; }
.bf-bar { display: grid; grid-template-columns: 60px minmax(0,1fr); gap: .6rem; align-items: center; font-size: .85rem; margin: .3rem 0; }
.bf-bar div { height: 10px; background: #fff; border: 1px solid var(--line, #e2e8f0); border-radius: 999px; overflow: hidden; }
.bf-bar i { display: block; height: 100%; background: var(--nb, var(--box)); }
.ar-row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .6rem 0; border-bottom: 1px dashed var(--line, #e2e8f0); flex-wrap: wrap; }
.ar-btns { display: flex; gap: .3rem; }
.ar-btns button { font: inherit; font-size: .85rem; padding: .35rem .8rem; border: 1.5px solid var(--line, #e2e8f0); border-radius: 999px; background: #fff; cursor: pointer; }
.ar-btns button.is-on { background: var(--box, #2563eb); border-color: var(--box, #2563eb); color: #fff; }
.ar-out { margin-top: 1rem; }
.gm-hud { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .9rem; background: var(--box-ink, #0b1220); color: #cbd5e1; padding: .6rem 1rem; border-radius: 10px; margin-bottom: 1rem; }
.gm-hud b { color: #fff; font-size: 1.05rem; }
.gm-hud--stats { justify-content: flex-start; gap: .4rem 1.2rem; }
.gm-center { text-align: center; padding: 1rem 0; }
.gm-big { font-size: 3rem; margin: 0; line-height: 1.2; }
.mm-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: .6rem; }
@media (max-width: 520px) { .mm-grid { grid-template-columns: repeat(4, minmax(0,1fr)); gap: .4rem; } }
.mm-card { position: relative; aspect-ratio: 1 / .8; border: 0; border-radius: 12px; cursor: pointer; font: inherit; padding: 0; background: none; perspective: 600px; }
.mm-card span { position: absolute; inset: 0; display: grid; place-items: center; border-radius: 12px; padding: .4rem; backface-visibility: hidden; transition: transform .35s; text-align: center; line-height: 1.2; }
.mm-back { background: linear-gradient(135deg, var(--box, #2563eb), var(--box-600, #1d4ed8)); color: #fff; font-size: 1.6rem; }
.mm-face { background: #fff; border: 2px solid var(--line, #e2e8f0); transform: rotateY(180deg); font-size: .8rem; color: var(--ink, #0f172a); }
.mm-face.is-term { font-family: var(--font-head, inherit); font-weight: 700; font-size: .95rem; color: var(--box-600, #1d4ed8); }
.mm-card.is-open .mm-back, .mm-card.is-done .mm-back { transform: rotateY(180deg); }
.mm-card.is-open .mm-face, .mm-card.is-done .mm-face { transform: rotateY(0); }
.mm-card.is-done .mm-face { border-color: var(--good, #16a34a); background: #f0fdf4; }
.ss-opts { display: grid; gap: .7rem; }
.ss-opt { display: flex; flex-direction: column; gap: .2rem; font-family: arial, sans-serif; }
.ss-opt .bt-serp__title { margin: 0; }
@media (prefers-reduced-motion: reduce) { .mm-card span { transition: none; } }