:root{--primary:#5b5bd6;--dark:#4545b8;--ink:#24242b;--muted:#666977;--border:#e7e7ee;--soft:#f4f1ff}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);line-height:1.55;background:#fff}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}a:hover{color:var(--dark)}button:disabled{cursor:default;opacity:.65}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #8a65db;outline-offset:4px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(2.4rem,4.6vw,4.2rem);line-height:1.08;letter-spacing:-.045em;margin-bottom:24px}h2{font-size:2rem;line-height:1.2;letter-spacing:-.035em;margin-bottom:22px}h3{font-size:1.12rem;line-height:1.35}em{font-style:normal;color:var(--primary)}.container{width:min(1180px,calc(100% - 40px));margin:auto}.muted,small{color:var(--muted)}small{font-size:.875rem}.eyebrow{display:block;font-size:.75rem;font-weight:700;letter-spacing:.13em;margin-bottom:18px;color:var(--primary)}header{border-bottom:1px solid var(--border);background:white}.navbar{min-height:86px;display:flex;align-items:center;justify-content:space-between;gap:22px}.logo{font-size:1.65rem;font-weight:800;color:var(--primary);letter-spacing:-1px;white-space:nowrap}.logo span{color:var(--ink)}.logo b{margin-left:6px;font-size:1.25rem}nav,.nav-actions{display:flex;gap:24px;align-items:center;font-size:.875rem;font-weight:600}.nav-actions{gap:15px}.nav-actions span{background:var(--soft);border-radius:50%;padding:3px 7px;color:var(--primary)}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 22px;border:0;background:var(--primary);color:#fff;border-radius:9px;font-weight:600}.button:hover{background:var(--dark);color:#fff}.button.small{min-height:40px;padding:10px 16px}.button.white{background:white;color:var(--primary)}.button.secondary{background:var(--soft);color:var(--dark)}.full{width:100%}.hero{background:#f7f5ff;border-bottom:1px solid #eeebfa}.hero-inner{display:grid;grid-template-columns:1.45fr 1fr;gap:85px;align-items:center;padding-top:56px;padding-bottom:52px}.hero p{color:var(--muted);font-size:1.05rem}.search{display:flex;gap:8px;padding:7px;background:white;border:1px solid var(--border);border-radius:12px;box-shadow:0 8px 25px #29215208;margin-top:26px}.search input{width:100%;min-width:0;border:0;padding:8px;background:transparent}.popular{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:.875rem;color:var(--muted);margin-top:14px}.popular button{border:0;background:transparent;text-decoration:underline;color:var(--muted);padding:4px}.hero-feature{background:#e5defb;padding:22px 26px 15px;border-radius:16px;transform:rotate(2deg)}.hero-feature>.eyebrow{font-size:.7rem}.sample{background:white;padding:26px;border-radius:4px;box-shadow:0 6px 12px #30245209}.sample>span{font-size:.75rem;letter-spacing:.08em}.sample h2{font-size:2.4rem;margin:16px 0}.sample p{font-size:.8rem;margin-bottom:0;margin-top:14px}.equations{display:flex;flex-wrap:wrap;gap:8px}.equations b{padding:9px;background:var(--soft);border-radius:5px;font-size:1rem;color:var(--primary)}.feature-link{display:block;font-size:.875rem;font-weight:600;margin-top:16px}.section{padding-top:54px;padding-bottom:54px}.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:center}.section-heading h2{margin-bottom:18px}.categories{display:flex;flex-wrap:wrap;gap:9px;margin:8px 0 22px}.categories button{border:1px solid var(--border);padding:10px 17px;background:white;border-radius:8px;color:var(--muted)}.categories button[aria-pressed=true]{background:var(--primary);color:white;border-color:var(--primary)}.filters{display:flex;flex-wrap:wrap;gap:20px;align-items:center;font-size:.875rem;margin-bottom:26px}.filters input{accent-color:var(--primary);width:16px;height:16px;vertical-align:middle}.sort{margin-left:auto}.filters select{border:1px solid var(--border);padding:8px;border-radius:7px;background:white}.text-button{border:0;background:transparent;color:var(--primary);padding:6px;text-decoration:underline}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.card{border:1px solid var(--border);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;position:relative;background:white;transition:transform .18s,box-shadow .18s}.card:hover{transform:translateY(-3px);box-shadow:0 10px 25px #2823470d}.cover{background:var(--cover,#eae5ff);min-height:207px;padding:34px 27px 22px;display:flex;align-items:center;justify-content:center}.cover-sheet{width:100%;background:white;min-height:150px;padding:18px;box-shadow:3px 5px 0 #00000008;display:flex;flex-direction:column;justify-content:space-between;color:#333044}.cover-sheet small{font-size:.65rem;letter-spacing:.08em;text-transform:uppercase}.cover-sheet strong{font-size:1.35rem;line-height:1.16;letter-spacing:-.035em;margin:16px 0}.cover-sheet span{font-size:.7rem;border-top:1px solid var(--border);padding-top:7px}.badge{position:absolute;left:12px;top:12px;background:white;padding:3px 9px;font-size:.75rem;font-weight:700;border-radius:5px;color:var(--dark)}.badge.free{color:#226b50}.favorite{position:absolute;right:10px;top:10px;border:1px solid #ffffff90;background:white;border-radius:50%;width:34px;height:34px;font-size:1.3rem;color:var(--primary)}.favorite[aria-pressed=true]{background:var(--primary);color:white}.card-body{padding:18px;display:flex;flex-direction:column;flex:1}.meta{font-size:.75rem;color:var(--muted);margin-bottom:7px}.card h3{margin:0 0 10px}.author{font-size:.8rem;color:var(--muted);margin-bottom:12px}.rating{font-size:.8rem;margin-bottom:16px}.rating b{color:#99701b}.card-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto}.price{font-size:1.15rem;font-weight:700}.card-bottom button{font-size:.8rem;padding:8px 11px;min-height:38px}.seller-banner{background:var(--primary);color:white;border-radius:16px;padding:42px 48px;display:grid;grid-template-columns:1.3fr 1fr;gap:40px}.seller-banner .eyebrow{color:#e0dfff}.seller-banner h2{font-size:2.5rem}.seller-note{border-left:1px solid #ffffff40;padding-left:45px;display:flex;flex-direction:column;justify-content:center}.seller-note>span{font-size:.75rem;letter-spacing:.12em}.seller-note p{font-size:1.7rem;font-weight:600;line-height:1.3;margin:20px 0}.seller-note a{color:white;font-size:.875rem}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:34px}.steps b{font-size:1.2rem;color:var(--primary)}.steps h3{margin:16px 0 8px}.steps p{color:var(--muted)}footer{border-top:1px solid var(--border);padding-top:30px;padding-bottom:25px;display:flex;flex-wrap:wrap;align-items:center;gap:20px}footer p{font-size:.8rem;margin:0}footer p:last-child{margin-left:auto}.back{display:block;margin-bottom:28px;font-size:.875rem;color:var(--muted)}.detail{display:grid;grid-template-columns:1fr 1fr;gap:54px}.detail .cover{min-height:480px;border-radius:12px;padding:55px}.detail .cover-sheet{min-height:350px;padding:35px}.detail .cover-sheet strong{font-size:2.8rem}.detail h1{font-size:2.6rem}.detail .price{font-size:2rem}.detail .purchase{display:flex;gap:12px;margin:22px 0}.detail .purchase .button:first-child{flex:1}.detail .info{background:#f8f8fb;padding:18px;border-radius:10px;font-size:.875rem}.detail .info p{margin:5px 0}.detail-description{grid-column:1/-1;max-width:800px}.auth-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;padding-top:60px;padding-bottom:70px}.auth-layout aside{background:var(--soft);padding:48px;border-radius:18px;min-height:450px;display:flex;flex-direction:column;justify-content:center}.auth-layout aside h1{font-size:3.5rem}.auth-card{max-width:460px;width:100%}.auth-card a{color:var(--primary);text-decoration:underline}form label:not(.sr-only){display:block;font-weight:600;font-size:.875rem;margin-bottom:14px}.auth-card input,.auth-card select{display:block;width:100%;padding:12px;border:1px solid #cdcdd9;border-radius:8px;margin-top:6px;background:white}.auth-card .muted{font-size:.875rem;display:block;margin-bottom:18px}.notice{padding:14px 16px;background:var(--soft);border-radius:8px;font-size:.875rem;color:#514780}.cart-layout{display:grid;grid-template-columns:1.65fr 1fr;gap:38px}.cart-row{display:flex;gap:20px;align-items:center;padding:22px 0;border-bottom:1px solid var(--border)}.cart-row .cover{min-height:0;width:105px;padding:10px;flex-shrink:0;border-radius:6px}.cart-row .cover-sheet{min-height:90px;padding:8px}.cart-row .cover-sheet strong{font-size:.8rem;margin:8px 0}.cart-row .cover-sheet small,.cart-row .cover-sheet span{display:none}.cart-row h3{margin-bottom:6px}.cart-row .row-price{margin-left:auto;text-align:right;white-space:nowrap}.summary{padding:28px;border:1px solid var(--border);border-radius:12px;align-self:start;background:#faf9ff}.summary-line{display:flex;justify-content:space-between;padding:12px 0;gap:10px}.summary-line.total{font-size:1.25rem;border-top:1px solid var(--border);font-weight:700;margin-bottom:15px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:28px 0 40px}.stats article{padding:24px;border:1px solid var(--border);border-radius:12px}.stats span{font-size:.875rem;color:var(--muted)}.stats h2{margin:14px 0 8px;font-size:1.7rem}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;text-align:left;font-size:.875rem}th,td{padding:18px;border-bottom:1px solid var(--border)}th{background:#faf9ff;color:var(--muted)}.status{background:var(--soft);padding:5px 9px;border-radius:6px;white-space:nowrap}.empty{grid-column:1/-1;padding:50px 24px;text-align:center;background:#faf9ff;border:1px dashed #d8d2eb;border-radius:12px}.empty p{color:var(--muted)}dialog{border:0;border-radius:15px;max-width:480px;width:calc(100% - 40px);padding:30px;box-shadow:0 20px 80px #0003}dialog::backdrop{background:#24203888}.close{float:right;border:0;background:transparent;font-size:1.5rem}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#292345;color:white;padding:12px 22px;border-radius:10px;box-shadow:0 8px 25px #0002;z-index:100;max-width:calc(100% - 30px);width:max-content;display:none}#toast.visible{display:block}.sr-only,.skip:not(:focus){position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip:focus{display:block;padding:15px}#catalog{scroll-margin-top:20px}
@media(max-width:1000px){.navbar{flex-wrap:wrap;padding:18px 0;gap:14px}nav{order:3;width:100%;justify-content:center}.hero-inner{gap:30px}.grid{grid-template-columns:repeat(3,minmax(0,1fr))}.stats{grid-template-columns:repeat(2,1fr)}.auth-layout{gap:35px}.detail{gap:30px}.auth-layout aside{padding:30px}.auth-layout aside h1{font-size:2.7rem}}
@media(max-width:720px){.hero-inner{grid-template-columns:1fr;padding-top:38px}.hero-feature{display:none}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.cover{padding:38px 15px 18px;min-height:190px}.cover-sheet{padding:13px}.cover-sheet strong{font-size:1.15rem}.card-body{padding:13px}.card-bottom{align-items:flex-start;flex-direction:column}.card-bottom .button{width:100%}.section{padding-top:36px;padding-bottom:36px}.seller-banner{padding:28px;grid-template-columns:1fr}.seller-banner h2{font-size:2rem}.seller-note{display:none}.steps{grid-template-columns:1fr;gap:15px}.section-heading{align-items:flex-start;flex-direction:column;gap:0}.sort{margin-left:0}.detail,.cart-layout,.auth-layout{grid-template-columns:1fr}.detail .cover{min-height:330px;padding:30px}.detail .cover-sheet{min-height:270px}.detail .cover-sheet strong{font-size:2.2rem}.auth-layout{padding-top:35px}.auth-layout aside{display:none}.auth-card{margin:auto}.nav-actions{font-size:.8rem;gap:10px}.nav-actions .button{padding:8px 10px}.logo{font-size:1.4rem}.navbar{justify-content:center}.navbar>.logo{margin-right:auto}h2{font-size:1.7rem}.cart-row{gap:10px;flex-wrap:wrap}.cart-row .cover{width:80px}.cart-row>div:nth-child(2){flex:1;min-width:120px}.stats{gap:12px}.stats article{padding:16px}.stats h2{font-size:1.4rem}footer p:last-child{margin-left:0}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* TeachersMarket.pl — katalog, podgląd i biblioteka */
.logo{font-size:1.4rem}.logo small{font-size:.85rem;color:var(--primary);letter-spacing:0}.advanced-filters{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:20px 0}.advanced-filters label,.library-toolbar label{font-size:.875rem;font-weight:600}.advanced-filters select,.library-toolbar input[type=search]{display:block;width:100%;margin-top:6px;padding:12px;border:1px solid var(--border);border-radius:8px;background:white;color:var(--ink)}#preview-dialog{max-width:740px;max-height:90vh;overflow:auto}.worksheet{background:#fff;border:1px solid var(--border);padding:35px;min-height:390px;box-shadow:0 4px 20px #29234508}.worksheet li{margin:22px 0;padding-bottom:12px;border-bottom:1px dashed #d5d0e2}.worksheet-footer{margin-top:32px;font-size:.75rem;color:var(--muted)}.preview-navigation{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 10px}.preview-navigation button[aria-pressed=true]{background:var(--primary);color:white}.library-toolbar{display:flex;justify-content:space-between;align-items:center;gap:24px;margin:28px 0}.library-toolbar input[type=checkbox]{accent-color:var(--primary)}.library-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.library-item{border:1px solid var(--border);border-radius:12px;overflow:hidden}.library-item .button{margin-top:10px}.library-item .cover{min-height:220px}.navbar{gap:16px}nav{gap:18px}.detail>div{min-width:0}@media(max-width:1100px){.navbar{flex-wrap:wrap;padding:18px 0}nav{order:3;width:100%;justify-content:center}}@media(max-width:720px){.advanced-filters{grid-template-columns:1fr}.library-grid{grid-template-columns:1fr}.library-toolbar{align-items:stretch;flex-direction:column}nav{flex-wrap:wrap;gap:12px;font-size:.8rem}.navbar>.logo{margin:0}.navbar{justify-content:center}.worksheet{padding:20px}.preview-navigation .button{padding:10px 12px}.nav-actions{flex-wrap:wrap;justify-content:center}}

/* Wersja 5: zaakceptowane logo brush i układ oryginalnej strony. */
:root{--primary:#5b5bd6;--dark:#4545b8;--soft:#f4f1ff}
.logo{display:block;width:250px;flex:0 0 auto;line-height:1;max-width:100%}.logo img{display:block;width:100%;height:auto}header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97)}.navbar{min-height:92px;gap:16px;flex-wrap:wrap;padding:10px 0}.navbar nav{order:3;width:100%;justify-content:center;gap:28px;padding-bottom:7px}.nav-actions{margin-left:auto;gap:12px}.button{border-radius:12px}.hero{background:radial-gradient(circle at top left,#eee9ff,transparent 35%),radial-gradient(circle at top right,#eaf8ff,transparent 32%),white;border:0}.hero-inner{display:block;max-width:850px;text-align:center;padding-top:72px;padding-bottom:65px}.hero .eyebrow{display:inline-flex;background:var(--soft);padding:8px 14px;border-radius:999px;font-size:.95rem;letter-spacing:0;text-transform:none;margin-bottom:22px}.hero h1{font-size:clamp(2.5rem,6vw,4.125rem);line-height:1.05;letter-spacing:-2px;max-width:850px;margin:0 auto 22px}.hero p{max-width:680px;margin:0 auto 30px;font-size:1.1875rem}.hero .search{max-width:720px;margin:0 auto;border-radius:18px;padding:8px;box-shadow:0 14px 40px #32325a1a}.hero .search input{padding:13px 16px}.popular{justify-content:center;margin-top:18px}.popular button{font-weight:700;text-decoration:none;color:var(--primary)}.section{padding-top:65px;padding-bottom:65px}#categories-section{scroll-margin-top:150px}.categories{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:0}.categories button{display:block;text-align:left;white-space:normal;background:#f8f8fb;border:1px solid var(--border);padding:22px;border-radius:18px;color:var(--ink);transition:transform .2s,border-color .2s}.category-icon{display:block;font-size:29px;margin-bottom:12px}.categories strong{display:block;font-size:1rem;margin-bottom:5px}.categories small{font-size:.875rem;font-weight:400}.categories button:hover,.categories button[aria-pressed=true]{border-color:var(--primary);background:var(--soft);color:var(--ink);transform:translateY(-3px)}.catalog-section{background:#f8f8fb}.catalog-section .card{border-radius:20px}.card .cover{background:linear-gradient(145deg,var(--cover),#faf9ff)}.card .badge{border-radius:999px;padding:6px 10px;background:var(--primary);color:white}.card .badge.free{background:#1f815a;color:white}.card .favorite{width:38px;height:38px}.seller-banner{margin-top:65px;padding:54px;border-radius:30px}.steps article{border:1px solid var(--border);border-radius:20px;padding:28px}.steps b{display:inline-flex;width:44px;height:44px;align-items:center;justify-content:center;border-radius:50%;background:var(--soft)}.steps{gap:20px}.steps h3{margin-top:18px}footer{display:block;background:#1e1e27;color:white;border:0;padding:35px 0;margin-top:25px}footer .footer-inner{display:flex;align-items:center;flex-wrap:wrap;gap:24px}footer p,footer .muted{color:#c4c4d2}footer .logo{width:245px}footer p:last-child{margin-left:auto;max-width:340px}.auth-layout aside{background:radial-gradient(circle at top right,#eaf8ff,transparent 50%),#f4f1ff;border-radius:26px}.auth-card{padding:28px;border:1px solid var(--border);border-radius:20px;max-width:490px}.summary,.stats article,.library-item{border-radius:20px}.detail .cover{border-radius:20px}.library-item .cover{background:linear-gradient(145deg,var(--cover),#faf9ff)}#catalog{scroll-margin-top:145px}.advanced-filters select{background:white}dialog{border-radius:20px}body{overflow-wrap:break-word}
@media(min-width:1380px){.navbar{flex-wrap:nowrap}.navbar nav{order:0;width:auto;gap:18px;padding:0;font-size:.8rem}.nav-actions{font-size:.8rem}.nav-actions .button{padding:10px 12px}.navbar .logo{width:225px}}
@media(max-width:960px){.categories{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-inner{padding-top:55px}.navbar nav{gap:18px}.nav-actions{gap:8px}.nav-actions .button{padding:10px}.seller-banner{padding:35px}.steps{grid-template-columns:1fr}.steps article{padding:24px}}
@media(max-width:640px){header{position:static}.navbar{justify-content:center;gap:12px}.navbar>.logo{margin:0;width:265px}.nav-actions{margin:0;justify-content:center;flex-wrap:wrap;font-size:.8rem}.nav-actions .button{padding:9px 12px}.navbar nav{flex-wrap:wrap;gap:10px 18px;font-size:.85rem}.hero-inner{padding:45px 0}.hero h1{font-size:2.6rem;letter-spacing:-1.5px}.hero p{font-size:1.05rem}.hero .search{flex-direction:column}.hero .search .button{width:100%}.categories{grid-template-columns:1fr}.grid{grid-template-columns:1fr}.card .cover{min-height:220px}.card-bottom{flex-direction:row;align-items:center}.card-bottom .button{width:auto}.section{padding:40px 0}.seller-banner{margin-top:40px;padding:32px 24px}.auth-card{padding:22px}.seller-banner h2{font-size:2rem}.footer-inner{flex-direction:column;align-items:flex-start!important}footer p:last-child{margin-left:0}#catalog,#categories-section{scroll-margin-top:20px}.steps{gap:16px}}

/* Osiem kafelków kategorii według zaakceptowanego wzoru. */
#categories{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}#categories button{min-height:154px;padding:22px;background:#f8f8fb;border:1px solid #e7e7ee;border-radius:18px}#categories .category-icon{font-size:29px;line-height:1.3;margin-bottom:18px}#categories strong{font-size:1rem;margin-bottom:8px}#categories small{line-height:1.5;color:#6f7280}#categories button:hover,#categories button[aria-pressed=true]{background:#f4f1ff;border-color:#5b5bd6}#categories-section h2{font-size:2.125rem;letter-spacing:-.025em}#categories-section .section-heading{margin-bottom:28px}
@media(max-width:960px){#categories{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:640px){#categories{grid-template-columns:1fr}}

/* Duże logo na początku strony głównej, pod górną belką. */
.brand-intro{display:flex;justify-content:center;align-items:center;padding-top:32px;padding-bottom:4px}
.brand-intro img{display:block;width:min(740px,100%);height:auto}
.brand-intro + .hero .hero-inner{padding-top:24px}
@media(max-width:640px){.brand-intro{padding-top:22px;padding-bottom:0}.brand-intro + .hero .hero-inner{padding-top:22px}}

/* Wyraźniejszy, wspólny gradient pod dużym logo i nagłówkiem. */
.welcome-background{
 background:radial-gradient(ellipse at 8% 12%,rgba(148,108,245,.42) 0%,transparent 56%),radial-gradient(ellipse at 95% 30%,rgba(87,180,245,.38) 0%,transparent 58%),linear-gradient(135deg,#eee4ff 0%,#e4e4ff 48%,#dff3ff 100%);
 border-bottom:1px solid #d6d5f0;
}
.welcome-background .hero{background:transparent}
.welcome-background .brand-intro{padding-top:38px}
.welcome-background .hero .eyebrow{background:rgba(255,255,255,.78);color:#4545b8}
.welcome-background .hero p{color:#50536a}
.welcome-background .popular{color:#50536a}
.welcome-background .popular button{color:#4545b8}
@media(max-width:640px){.welcome-background .brand-intro{padding-top:24px}}

/* Wersja 10: menu wyśrodkowane w osobnym rzędzie na całej szerokości belki. */
header .navbar{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 24px;padding:10px 0 14px}
header .navbar>.logo{grid-column:1;grid-row:1;justify-self:start;margin:0}
header .navbar>.nav-actions{grid-column:2;grid-row:1;justify-self:end;margin:0}
header .navbar>nav{grid-column:1/-1;grid-row:2;width:100%;display:flex;justify-content:center;flex-wrap:wrap;gap:12px 28px;padding:4px 0 0;margin:0}
.welcome-background .hero .hero-inner{padding-top:52px}
.welcome-background .hero .brand-intro{width:100%;margin:0 auto;padding:28px 0 8px}
.welcome-background .hero .brand-intro img{width:min(740px,100%);height:auto}
@media(max-width:720px){header .navbar{grid-template-columns:minmax(0,1fr);justify-items:center;gap:12px}header .navbar>.logo{grid-column:1;grid-row:1;justify-self:center}header .navbar>.nav-actions{grid-column:1;grid-row:2;justify-self:center;flex-wrap:wrap;justify-content:center}header .navbar>nav{grid-column:1;grid-row:3;gap:10px 18px}.welcome-background .hero .hero-inner{padding-top:36px}.welcome-background .hero .brand-intro{padding-top:22px}}

/* Wersja 11: menu bliżej górnej krawędzi belki. */
header .navbar{row-gap:0;padding-top:2px;padding-bottom:8px}
header .navbar>nav{padding-top:0;margin-top:-12px}
@media(max-width:720px){header .navbar{row-gap:8px;padding-top:6px;padding-bottom:10px}header .navbar>nav{margin-top:0}}

/* Wersja 12: menu w górnym rzędzie, popularne frazy nad dużym logo. */
@media(min-width:1100px){
 header .navbar{width:calc(100% - 40px);max-width:1680px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:16px;min-height:80px;padding:6px 0}
 header .navbar>.logo{grid-column:1;grid-row:1;width:210px;justify-self:start}
 header .navbar>nav{grid-column:2;grid-row:1;width:auto;justify-self:center;justify-content:center;flex-wrap:nowrap;gap:clamp(12px,1.4vw,24px);margin:0;padding:0;font-size:.875rem;white-space:nowrap}
 header .navbar>.nav-actions{grid-column:3;grid-row:1;justify-self:end;gap:10px;font-size:.8rem;white-space:nowrap}
 header .navbar .nav-actions .button{padding:10px 12px}
}
@media(min-width:1100px) and (max-width:1250px){header .navbar>.logo{width:180px}header .navbar>nav{font-size:.8rem;gap:12px}header .navbar>.nav-actions{gap:7px}header .navbar .nav-actions .button{padding:10px}}
@media(min-width:721px) and (max-width:1099px){header .navbar>nav{margin-top:0}}
.welcome-background .popular{margin-top:16px;margin-bottom:0}
.welcome-background .hero .brand-intro{padding-top:8px;padding-bottom:0}

/* Wersja 13: stopka u dołu okna przy krótkiej treści, pod treścią przy długiej. */
html{min-height:100%}
body{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}
body>header,body>footer{flex-shrink:0}
body>main{flex:1 0 auto;min-width:0}
body>footer{position:static}

/* Karta materiału — czytelny zakup, specyfikacja i licencja. */
.product-summary{min-width:0}.product-author{font-size:.875rem;color:var(--muted);border-left:3px solid var(--primary);padding-left:14px;margin:20px 0}.product-author strong{color:var(--ink);font-size:1rem}.product-tags{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0}.product-tags span{background:var(--soft);color:var(--dark);padding:6px 12px;border-radius:999px;font-size:.875rem}.purchase-box{padding:24px;background:#f7f5ff;border:1px solid #ded8f2;border-radius:20px}.purchase-box .purchase{margin:16px 0 12px}.purchase-license{font-size:.875rem;font-weight:600;margin-bottom:8px}.purchase-box .meta:last-child{margin:0}.file-spec{margin-top:28px}.file-spec h2{font-size:1.2rem;margin-bottom:12px}.file-spec dl{margin:0}.file-spec dl>div{display:grid;grid-template-columns:1fr 1.3fr;gap:16px;padding:10px 0;border-bottom:1px solid var(--border);font-size:.875rem}.file-spec dt{color:var(--muted)}.file-spec dd{margin:0;font-weight:600}.detail-description{max-width:none;padding-top:12px}.detail-description>ul{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;list-style:none;padding:0;margin-bottom:30px}.detail-description>ul>li{padding:20px;background:#f8f8fb;border-radius:14px;border:1px solid var(--border)}.product-faq{border-bottom:1px solid var(--border);padding:18px 0}.product-faq summary{cursor:pointer;font-weight:600}.product-faq p{margin:14px 0 0;max-width:800px;color:var(--muted)}.product-preview-column{align-self:start}.product-summary h1{overflow-wrap:break-word}@media(max-width:720px){.detail-description>ul{grid-template-columns:1fr}.purchase-box{padding:20px}.file-spec dl>div{gap:12px}.detail .purchase{flex-wrap:wrap}.detail .purchase .button:first-child{min-width:160px}}
/* Konto użytkownika */
.category-group{display:block;min-width:0;width:100%;margin:0 0 24px}.category-group h3,.category-group summary{font-size:1.2rem;font-weight:700;margin:0 0 18px}.category-group summary{cursor:pointer;padding:14px 18px;background:#f4f1ff;border-radius:12px}.category-group[open] summary{margin-bottom:18px}#categories.category-groups{display:block}#categories .category-group .categories{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}#categories .category-group button{min-height:132px}#categories .category-group button strong{overflow-wrap:anywhere}@media(max-width:960px){#categories .category-group .categories{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:640px){#categories .category-group .categories{grid-template-columns:1fr}#categories .category-group button{min-height:0}}
.category-flag{display:block;width:46px;height:30px;object-fit:cover;border-radius:3px;box-shadow:0 0 0 1px #24242b22}#categories .category-group button{min-height:112px}#categories .category-group button.has-description{min-height:132px}
.category-page h1{font-size:clamp(2.2rem,4vw,3.5rem)}.category-page-filters{display:flex;flex-wrap:wrap;gap:16px;margin:28px 0}.category-page-filters label{display:block;min-width:min(100%,250px);font-weight:600}.category-page-filters select{display:block;width:100%;padding:12px;margin-top:7px;border:1px solid #cdcdd9;border-radius:10px;background:#fff}#category-count{font-weight:600;margin-bottom:18px}#category-products .card .cover{min-height:170px}#category-products .author a{text-decoration:underline;text-underline-offset:3px}
.exact-grades{grid-column:1/-1;border:1px solid var(--border);border-radius:12px;padding:14px 16px;margin:0 0 18px}.exact-grades legend{font-weight:700;padding:0 5px}.exact-grades p{font-size:.875rem;margin:0 0 12px}.exact-grades #grade-choices{display:flex;flex-wrap:wrap;gap:10px 22px}.exact-grades #grade-choices label{display:inline-flex;align-items:center;gap:5px;margin:0;font-weight:400;white-space:nowrap}.exact-grades #grade-choices input{width:auto;margin:0;accent-color:var(--primary)}
.subject-suggestions{width:min(720px,100%);margin:12px auto 0;padding:16px;text-align:left;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:0 12px 30px #24242b18;scroll-margin-top:130px}.subject-suggestions[hidden]{display:none}.subject-suggestions>strong{display:block;margin-bottom:10px}.subject-suggestion-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.subject-suggestion-list a{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:10px;color:var(--ink);font-weight:600}.subject-suggestion-list a:hover,.subject-suggestion-list a:focus-visible{background:var(--soft)}.subject-suggestion-list a img{width:30px;height:20px;object-fit:cover;border-radius:2px}.subject-suggestion-list a small{display:block;font-weight:400}@media(max-width:640px){.subject-suggestion-list{grid-template-columns:1fr}}
.hero .search{border:0;box-shadow:0 10px 30px #32325a16}.hero .search input{border:0;box-shadow:none}.hero .search input:focus-visible{outline:none}.hero .search:focus-within{box-shadow:0 0 0 2px #5b5bd655,0 10px 30px #32325a16}.subject-suggestions{border:0;box-shadow:0 12px 30px #24242b12}
/* Ciemny pasek menu; w jasnym hero tylko wyszukiwarka i logo. */
header{background:#171720;border-bottom:1px solid #2e2e3a;color:#fff}
header .navbar>nav a,header .navbar>.nav-actions>a:not(.button),header .navbar>.nav-actions>.text-button{color:#fff}
header .navbar>nav a:hover,header .navbar>.nav-actions>a:not(.button):hover,header .navbar>.nav-actions>.text-button:hover{color:#c7c7ff}
.welcome-background .hero h1,.welcome-background .hero .hero-inner>div>p,.welcome-background .popular{display:none}
.welcome-background .hero .hero-inner{padding-top:34px;padding-bottom:24px}
.welcome-background .hero .search{margin-top:0}
.welcome-background .hero .brand-intro{padding-top:28px}
@media(max-width:640px){.welcome-background .hero .hero-inner{padding-top:28px;padding-bottom:20px}.welcome-background .hero .brand-intro{padding-top:22px}}
/* Na górze duże logo, poniżej wyszukiwarka; menu wykorzystuje szerokość ekranu. */
header .navbar{width:calc(100% - 40px);max-width:none}
.welcome-background .hero .hero-inner>div{display:flex;flex-direction:column;align-items:center}
.welcome-background .hero .brand-intro{order:1;width:100%;margin:0 auto;padding:0 0 22px;text-align:center}
.welcome-background .hero .brand-intro img{display:block;margin:0 auto;width:min(740px,100%);height:auto}
.welcome-background .hero .search{order:2;width:min(720px,100%);margin:0 auto}
.welcome-background .hero .subject-suggestions{order:3}
@media(max-width:640px){header .navbar{width:calc(100% - 24px)}.welcome-background .hero .brand-intro{padding-bottom:16px}}
/* Jeden ciągły gradient pod treścią całego portalu. */
body{background:radial-gradient(ellipse at 8% 12%,rgba(148,108,245,.38) 0%,transparent 56%),radial-gradient(ellipse at 95% 30%,rgba(87,180,245,.34) 0%,transparent 58%),linear-gradient(135deg,#eee4ff 0%,#e7e9ff 48%,#dff3ff 100%);background-attachment:fixed}
main,.welcome-background,.catalog-section{background:transparent}
.welcome-background{border-bottom:0}
.account-section{max-width:900px}.account-panel{padding:32px;border:1px solid var(--border);border-radius:20px;background:#faf9ff}.account-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.account-panel p{overflow-wrap:anywhere}#form-message:not(:empty){padding:12px;background:var(--soft);border-radius:8px;margin-top:16px;font-size:.9rem}
.creator-profile-edit{margin-top:24px;padding:32px;border:1px solid var(--border);border-radius:20px;background:#fff}.creator-profile-edit label{display:block;margin:16px 0;font-weight:600}.creator-profile-edit input:not([type=file]),.creator-profile-edit textarea{display:block;width:100%;font:inherit;padding:12px;margin-top:8px;border:1px solid #cdcdd9;border-radius:10px}.creator-profile-edit textarea{resize:vertical}.creator-profile-edit [type=file]{display:block;margin-top:8px}.creator-profile-edit .button,.creator-profile-edit .text-button{margin:8px 8px 8px 0}.creator-avatar{width:120px;height:120px;object-fit:cover;border-radius:50%;border:3px solid var(--border)}.creator-public-header{display:flex;gap:24px;align-items:center;flex-wrap:wrap;margin:24px 0}.creator-public-header .creator-avatar{width:150px;height:150px}.creator-avatar-placeholder{display:grid;place-items:center;background:var(--soft);font-size:3rem}.creator-public-bio p{white-space:pre-wrap;overflow-wrap:anywhere;max-width:720px}.creator-cover-placeholder{background:var(--soft)}.product-author a{font-weight:700;font-size:1rem}@media(max-width:720px){.creator-profile-edit{padding:20px}}
/* Edytor materiału */
.seller-form{display:grid;grid-template-columns:1.35fr 1fr;gap:32px}.seller-form label{display:block;font-size:.9rem;font-weight:600;margin:0 0 18px}.seller-form input:not([type=checkbox]),.seller-form select,.seller-form textarea{display:block;width:100%;max-width:100%;font:inherit;padding:12px;margin-top:7px;border:1px solid #cdcdd9;border-radius:10px;background:white;color:var(--ink)}.seller-form textarea{resize:vertical}.field-pair{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}.file-box{border:1px solid var(--border);background:#faf9ff;padding:24px;border-radius:18px;margin-bottom:20px}.file-box h2{font-size:1.25rem}.file-box p{font-size:.875rem;color:var(--muted)}.file-box input[type=file]{font-size:.8rem;padding:8px}.saved-cover{display:block;max-width:100%;max-height:240px;margin-top:15px;border-radius:8px;object-fit:contain}.editor-bottom{grid-column:1/-1;border-top:1px solid var(--border);padding-top:20px}.rights-confirm{display:flex!important;align-items:flex-start;gap:10px;font-weight:400!important}.rights-confirm input{margin-top:5px;accent-color:var(--primary)}#seller-message{min-height:1.5em}.seller-form :disabled{opacity:.65}@media(max-width:720px){.seller-form{grid-template-columns:1fr}.field-pair{grid-template-columns:1fr}.file-box{padding:18px}.editor-bottom .account-actions{flex-direction:column}.editor-bottom .button{width:100%}}
.admin-filter{display:block;max-width:360px;margin:24px 0}.admin-filter select,.review-form select,.review-form textarea,.creator-review input{display:block;width:100%;margin:8px 0 18px;border:1px solid #cdcdd9;padding:12px;border-radius:10px;font:inherit;background:white}.creator-review{padding:24px;border:1px solid var(--border);border-radius:18px;margin:18px 0}.review-layout{display:grid;grid-template-columns:1fr 1fr;gap:36px}.review-layout h2{margin-top:18px}.review-form{background:#faf9ff;border:1px solid var(--border);padding:26px;border-radius:18px}.review-form label{display:block;margin-bottom:16px;font-weight:600}.review-form .check-row{font-weight:400;display:flex;gap:10px;align-items:flex-start}.check-row input{margin-top:6px;accent-color:var(--primary)}.review-event{padding:18px;border-bottom:1px solid var(--border)}.review-description{white-space:pre-wrap;overflow-wrap:anywhere}.review-layout dd{margin:4px 0 18px}.review-layout dt{font-weight:600}.public-cover{width:100%;height:100%;max-height:440px;object-fit:contain}.card .public-cover{height:170px}#admin-message{color:var(--dark);font-weight:600}@media(max-width:720px){.review-layout{grid-template-columns:1fr}.review-form{padding:20px}}
.preview-editor{grid-column:1/-1;padding:26px;border:1px solid var(--border);border-radius:18px;background:#faf9ff}.editor-files .preview-editor{grid-column:auto;margin-bottom:20px}.preview-options{display:grid;grid-template-columns:1fr 1fr;gap:28px}.preview-options h3{margin-top:10px}.preview-options p{font-size:.875rem;color:var(--muted)}.preview-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:20px 0}.editor-files .preview-gallery{grid-template-columns:1fr}.preview-gallery figure{margin:0}.preview-gallery img{display:block;width:100%;height:auto;max-height:520px;object-fit:contain;background:white;border:1px solid var(--border)}.preview-gallery figcaption{font-size:.8rem;color:var(--muted);margin-top:8px}.customer-preview{display:block;width:100%;height:auto;background:white}.preview-editor [hidden]{display:none!important}@media(max-width:720px){.preview-options,.preview-gallery{grid-template-columns:1fr}.preview-editor{padding:18px}}

/* v21: poprzedni wygląd, spokojniejsza wielkość nagłówka nad wyszukiwarką. */
.welcome-background .hero h1{font-size:clamp(1.875rem,3.4vw,2.5rem);line-height:1.18;letter-spacing:-.035em;max-width:740px;margin-bottom:18px}
.welcome-background .hero .hero-inner{padding-top:40px}
.welcome-background .hero p{font-size:1.0625rem;max-width:640px;margin-bottom:24px}
@media(max-width:640px){.welcome-background .hero .hero-inner{padding-top:30px}.welcome-background .hero p{font-size:1rem}}