/* Number Series: a small playable surface in the existing MindProof system. */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.series-shell{padding:0 48px 70px}.series-shell [hidden]{display:none!important}
.series-breadcrumb{display:flex;gap:12px;align-items:center;color:var(--color-text-secondary);font-size:13px;padding-top:22px}.series-breadcrumb a{text-decoration:none;color:var(--color-text-secondary)}
.series-hero{display:grid;grid-template-columns:1fr 1.17fr;gap:55px;align-items:start;padding:60px 0 72px}
.series-intro{padding-top:24px;min-width:0}.series-intro .eyebrow{font-size:10px;letter-spacing:.12em;line-height:1.7;color:var(--color-text-secondary)}.series-spark{color:var(--color-primary);font-size:19px;vertical-align:middle;margin-inline-end:6px}
.series-intro h1{font-size:clamp(44px,5.3vw,68px);line-height:1.04;letter-spacing:-.055em;margin-bottom:28px}.series-intro h1 em{color:var(--color-primary);font-style:normal}.series-intro .lead{font-size:18px;max-width:355px;line-height:1.7}
.series-benefits{display:flex;flex-wrap:wrap;gap:10px 18px;list-style:none;padding:0;margin:27px 0;color:var(--color-text-secondary);font-size:13px}.series-benefits li{display:flex;gap:7px;align-items:center}.series-benefits span{color:var(--color-success);font-weight:650}.series-collection{font-size:12px;margin:32px 0 12px;color:var(--color-text-tertiary)}.series-guide-link{font-size:13px}
.series-player{min-width:0;background:white;border:1px solid #e5e2f3;border-radius:27px;box-shadow:0 20px 70px #2922630c;overflow:hidden}.series-player-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:19px 27px;border-bottom:1px solid #eeecf6;background:linear-gradient(105deg,#fcfbff,#f2efff)}.series-player-top p{display:flex;align-items:center;gap:8px;margin:0;font-size:13px;font-weight:600;color:#393448}.series-live-dot{width:7px;height:7px;border-radius:50%;background:var(--color-primary)}.series-difficulty{color:#635489;background:#ece7fa;border:1px solid #e5dcf4;padding:3px 10px;font-size:11px;border-radius:8px;white-space:nowrap}
.series-player-main{padding:27px 28px 16px}.series-progress{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;align-items:center;margin-bottom:25px;font-size:11px;font-weight:550;color:var(--color-text-secondary)}.series-muted{color:#757889}.series-progress [data-series-solved]{font-size:10px;color:var(--color-success)}
.series-player fieldset{border:0;padding:0;margin:0;min-width:0}.series-player legend{padding:0;font-size:23px;line-height:1.35;font-weight:600;letter-spacing:-.025em}.series-sequence{display:flex;flex-wrap:wrap;justify-content:center;gap:7px;list-style:none;padding:0;margin:27px 0 30px;font-variant-numeric:tabular-nums;font-size:clamp(21px,2.3vw,28px);font-weight:600;line-height:1.2}.series-sequence li{flex:1 0 52px;max-width:78px;min-height:67px;padding:15px 5px;display:grid;place-items:center;background:#f6f6fb;border:1px solid #ededf5;border-radius:13px}.series-sequence li.series-last{color:var(--color-primary);background:var(--color-primary-soft);border:1px dashed #b7abfa}.series-sequence.is-complete li.series-last{background:#e9f7f0;color:var(--color-success);border-style:solid;border-color:#b3daca}
.series-answers{display:grid;grid-template-columns:1fr 1fr;gap:11px}.series-answer{position:relative;display:flex;align-items:center;gap:12px;min-height:59px;padding:13px 16px;border:1.5px solid #dfe0eb;border-radius:13px;cursor:pointer;transition:background .15s,border-color .15s}.series-answer:hover:not(:has(input:disabled)){background:#faf9ff;border-color:#b8aff2}.series-answer input{position:absolute;width:1px;height:1px;opacity:0}.series-answer:has(input:focus-visible){outline:3px solid var(--color-primary);outline-offset:3px}.series-answer:has(input:checked){border-color:var(--color-primary);background:var(--color-primary-soft)}.series-option{font-size:11px;line-height:1;border:1px solid #dcdde9;color:var(--color-text-secondary);border-radius:6px;padding:5px}.series-value{font-size:22px;font-weight:550;line-height:1.2}.series-mark{margin-inline-start:auto;font-weight:650}.series-answer.is-correct{background:#edf9f2;border-color:#29835f;color:#175f45}.series-answer.is-correct .series-mark{color:var(--color-success)}.series-answer.is-wrong{background:#fff4f4;border-color:#d98490}.series-answer.is-wrong .series-mark{color:var(--color-danger)}.series-answer:has(input:disabled){cursor:default}
.series-feedback{font-size:14px;line-height:1.5;margin:16px 0}.series-feedback:empty{margin:20px 0 0}.series-feedback.is-success{color:var(--color-success)}.series-feedback.is-miss{color:#8d4552}.series-check{width:100%;font-size:15px;min-height:53px}.series-answer-hint{font-size:11px;text-align:center;margin:13px 0 17px;color:var(--color-text-tertiary)}
.series-next-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:14px;border-top:1px solid #f0eef7}.series-filter select{font:inherit;font-size:12px;color:#55526b;background:#f7f6fb;border:1px solid #e5e1f1;border-radius:9px;min-height:40px;padding:7px 25px 7px 10px;max-width:100%}.series-filter select:focus-visible{outline:3px solid var(--color-primary);outline-offset:3px}.series-text-button{background:none;border:0;color:var(--color-primary-strong);font-size:12px;font-weight:600;padding:10px 0;min-height:44px}.series-text-button span{display:inline-block;margin-inline-start:5px}.series-text-button:disabled{color:var(--color-text-tertiary)}
.series-solution{background:#f8f7fe;border:1px solid #eeebfb;border-radius:15px;padding:20px;margin:20px 0}.series-solution h3{font-size:21px;line-height:1.4;margin-bottom:10px}.series-solution h3:focus{outline:none}.series-solution p,.series-static-answer p{font-size:14px;margin-bottom:10px;line-height:1.7}.series-answer-line strong{color:var(--color-primary-strong);font-size:20px;display:inline-block;margin-inline:4px}.series-equations{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:15px 0 0}.series-equations li{background:white;border:1px solid #eae5f7;border-radius:7px;font-size:12px;line-height:1.5;padding:5px 9px;color:#504368;font-variant-numeric:tabular-nums}
.series-share-row{display:flex;align-items:center;justify-content:center;border-top:1px solid #f0edf8;padding:10px 22px;gap:12px}.series-share-row button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;background:none;border:0;color:#635975;font-size:12px;font-weight:550;border-radius:8px}.series-share-row button:hover{background:#f4f1fc}.series-share-row svg{width:18px;height:18px}.series-copy-button{padding:10px 13px;border-inline-start:1px solid #e8e2f2!important;border-radius:0!important}.series-share-status{font-size:12px;text-align:center;margin:0;padding:0 24px 16px}.series-share-status:empty{padding:0}.series-share-fallback{padding:10px 24px;font-size:12px}.series-share-fallback input{display:block;width:100%;padding:10px;border:1px solid #d8d3ea;border-radius:8px;font-size:12px;background:white}
.series-app-card{display:grid;grid-template-columns:60px 1fr auto;align-items:center;gap:22px;padding:28px 30px;border-radius:23px;background:var(--color-night);color:white;margin:-28px 0 65px}.series-app-card img{border-radius:14px}.series-app-card h2{font-size:24px;letter-spacing:-.025em;margin:0 0 9px}.series-app-card p{color:#c1c1d6;font-size:14px;margin:0 0 5px}.series-app-card small{font-size:11px;color:#a7a9c2}.series-app-card .button{font-size:13px;white-space:normal;max-width:240px}
.series-guide{border-top:1px solid #e6e3ef;padding:68px 0 54px;scroll-margin-top:25px}.series-section-heading{max-width:640px}.series-section-heading .eyebrow{margin-bottom:15px}.series-section-heading h2{font-size:38px}.series-section-heading>p:last-child{font-size:16px;line-height:1.8}.series-tips{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;margin-top:35px}.series-tip-number{display:block;color:var(--color-primary);font-size:12px;margin-bottom:17px;font-weight:650}.series-tips h3{font-size:21px;line-height:1.3}.series-tips p{font-size:14px;line-height:1.8;margin:0}
.series-rules{padding:20px 0 60px}.series-rules>h2,.series-faq>h2,.series-related>h2{font-size:29px;line-height:1.4;margin-bottom:25px}.series-rule-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.series-rule-card{background:white;border:1px solid #eae7f3;border-radius:16px;padding:20px;text-decoration:none;transition:border-color .15s,transform .15s;min-width:0}.series-rule-card:hover{border-color:#b5aaf2;transform:translateY(-2px)}.series-rule-example{display:block;color:var(--color-primary-strong);font-size:18px;font-weight:550;line-height:1.5;margin-bottom:14px;font-variant-numeric:tabular-nums}.series-rule-card h3{color:var(--color-text-primary);font-size:15px;line-height:1.4;letter-spacing:0;margin-bottom:16px}.series-rule-card>span:last-child{display:block;font-size:11px;color:var(--color-text-secondary)}
.series-faq{max-width:760px;padding:0 0 55px}.series-faq details{border-bottom:1px solid #e5e1ef;padding:18px 0}.series-faq summary{font-size:16px;line-height:1.5;min-height:30px}.series-faq p{font-size:14px;line-height:1.8;margin:16px 0 5px}
.series-related{border-top:1px solid #e5e1ef;padding-top:45px}.series-related>div{display:grid;grid-template-columns:1fr 1fr;gap:20px}.series-related a{position:relative;text-decoration:none;background:#eeebfb;border-radius:20px;padding:26px;color:var(--color-text-primary)}.series-related-icon{font-size:25px;color:var(--color-primary);display:block;margin-bottom:17px}.series-related h3{font-size:21px;line-height:1.4;max-width:350px}.series-related p{font-size:14px;line-height:1.8;margin:0;max-width:390px}.series-related a>span:last-child{position:absolute;inset-inline-end:22px;top:26px;color:var(--color-primary)}
.series-promo{margin:35px 32px;padding:35px 45px;border:1px solid #e5dff6;border-radius:25px;background:linear-gradient(110deg,#efebff,#f7f5fc);display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}.series-promo .eyebrow{margin-bottom:10px}.series-promo h2{font-size:30px;line-height:1.2;margin-bottom:13px}.series-promo p{font-size:15px;max-width:590px}.series-promo-pattern{display:grid;grid-template-columns:repeat(2,58px);gap:8px;transform:rotate(-7deg)}.series-promo-pattern span{display:grid;place-items:center;width:58px;height:58px;border:1px solid #d9d0f8;border-radius:13px;background:#fff9;color:var(--color-primary-strong);font-size:24px;font-weight:550}.series-promo-pattern span:last-child{background:var(--color-primary);color:white;border-color:var(--color-primary)}
:lang(ar) .series-intro h1{line-height:1.3;letter-spacing:0}:lang(ar) .series-player legend,:lang(ar) .series-rule-card h3{letter-spacing:0;line-height:1.6}:lang(ar) .series-filter select{padding-inline:10px 25px}:lang(ar) .series-sequence,:lang(ar) .series-equations{font-family:Outfit,system-ui,sans-serif}:lang(ar) .series-text-button span{transform:scaleX(-1)}
@media(max-width:1050px){.series-shell{padding-inline:32px}.series-hero{gap:30px;grid-template-columns:.9fr 1.1fr}.series-intro h1{font-size:54px}.series-rule-grid{grid-template-columns:repeat(3,1fr)}.series-app-card{grid-template-columns:50px 1fr}.series-app-card .button{grid-column:2}.series-app-card img{width:50px}.series-promo-pattern{grid-template-columns:repeat(2,50px)}.series-promo-pattern span{width:50px;height:50px}}
@media(max-width:850px){.series-hero{grid-template-columns:1fr;padding-top:28px;gap:30px}.series-intro{padding-top:10px;max-width:560px}.series-intro h1{font-size:60px;margin-bottom:22px}.series-intro .lead{max-width:510px}.series-benefits{margin:22px 0}.series-collection{margin-top:20px}.series-guide-link{display:none}.series-player{max-width:620px;width:100%;margin-inline:auto}.series-tips{gap:24px}.series-promo{padding:30px}.series-promo h2{font-size:27px}}
@media(max-width:600px){.series-shell{padding:0 20px 45px}.series-breadcrumb{font-size:11px;padding-top:16px}.series-hero{padding:24px 0 45px}.series-intro h1{font-size:49px}.series-intro .eyebrow{font-size:9px;letter-spacing:.07em;margin-bottom:19px}.series-intro .lead{font-size:16px;line-height:1.7;margin-bottom:0}.series-benefits{font-size:12px;gap:8px 13px;margin:19px 0}.series-collection{font-size:11px;margin:0}.series-player{border-radius:21px}.series-player-top{padding:16px 20px}.series-player-top p{font-size:12px}.series-player-main{padding:22px 20px 14px}.series-progress{margin-bottom:20px}.series-player legend{font-size:21px}.series-sequence{font-size:23px;margin:22px 0 25px;gap:6px}.series-sequence li{flex-basis:48px;min-height:61px;padding-inline:4px}.series-answer{padding:12px;gap:10px;min-height:55px}.series-value{font-size:21px}.series-check{font-size:14px}.series-next-row{gap:7px}.series-text-button{font-size:11px}.series-filter select{font-size:11px}.series-share-row{padding-inline:12px}.series-share-row button{font-size:11px}.series-solution{padding:17px}.series-solution h3{font-size:20px}.series-solution p{font-size:13px}.series-app-card{grid-template-columns:44px 1fr;padding:23px 20px;gap:15px;margin:0 0 45px}.series-app-card h2{font-size:22px;line-height:1.4}.series-app-card p{font-size:13px}.series-app-card img{width:44px}.series-app-card .button{grid-column:1/-1;width:100%;max-width:none}.series-guide{padding:43px 0 30px}.series-section-heading h2{font-size:32px}.series-section-heading>p:last-child{font-size:15px}.series-tips{grid-template-columns:1fr;gap:27px;margin-top:28px}.series-tip-number{margin-bottom:9px}.series-tips h3{margin-bottom:10px}.series-rules{padding:25px 0 40px}.series-rules>h2,.series-faq>h2,.series-related>h2{font-size:25px}.series-rule-grid{grid-template-columns:repeat(2,1fr);gap:10px}.series-rule-card{padding:16px 14px}.series-rule-example{font-size:16px;overflow-wrap:anywhere}.series-rule-card h3{font-size:14px}.series-faq{padding-bottom:40px}.series-faq summary{font-size:15px}.series-related>div{grid-template-columns:1fr}.series-related a{padding:24px}.series-promo{margin:24px 12px;padding:26px;grid-template-columns:1fr}.series-promo-pattern{display:none}.series-promo h2{font-size:27px}}
@media(max-width:360px){.series-shell{padding-inline:16px}.series-intro h1{font-size:43px}.series-player-main{padding-inline:16px}.series-progress [data-series-solved]{font-size:9px}.series-sequence{gap:5px;font-size:21px}.series-sequence li{flex-basis:45px}.series-next-row{flex-direction:column;align-items:stretch}.series-filter select{width:100%}.series-text-button{text-align:center;font-size:12px}.series-rule-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.series-rule-card,.series-answer{transition:none}.series-rule-card:hover{transform:none}}
.series-picker {margin:24px 0 40px;padding:20px 24px;border:1px solid var(--line,#dedede);border-radius:16px;}
.series-picker summary {cursor:pointer;font-weight:650;}
.series-picker p {margin:14px 0;}
.series-picker nav {display:grid;grid-template-columns:repeat(auto-fit,minmax(85px,1fr));gap:10px;}
.series-picker nav a {padding:10px;border:1px solid var(--line,#dedede);border-radius:8px;text-align:center;text-decoration:none;}
.series-picker nav a:hover,.series-picker nav a:focus-visible {outline:2px solid currentColor;outline-offset:2px;}