:root{--bg:#f6f8fb;--card:#fff;--text:#14213d;--blue:#315ea8;--line:#dbe3ee;--soft:#eef4ff;--shadow:0 12px 28px rgba(20,33,61,.08)}
*{box-sizing:border-box}html{scroll-behavior:auto}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}.wrap{max-width:1180px;margin:0 auto;padding:0 22px}
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line);box-shadow:0 6px 18px rgba(20,33,61,.06)}.top,.compact-top{height:72px;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:28px}.logo{max-width:390px;flex:0 1 390px;display:flex;align-items:center;white-space:nowrap;color:var(--text);text-decoration:none;font-size:22px;font-weight:900}.logo-img,.logo img{height:29px;max-height:29px;width:auto;max-width:100%;object-fit:contain;display:block}.main-nav{margin-left:auto;display:flex;align-items:center;justify-content:flex-end;gap:24px;font-size:16px;font-weight:900;white-space:nowrap;flex:0 0 auto}.main-nav .nav-link,.nav-button{color:#071b3d;text-decoration:none;padding:24px 0 22px;border:0;border-bottom:3px solid transparent;background:none;font:inherit;cursor:pointer;line-height:1}.main-nav .nav-link:hover,.nav-button:hover,.nav-dropdown:focus-within .nav-button{color:var(--blue);border-bottom-color:var(--blue)}.nav-dropdown{position:relative}.dropdown-menu{display:none;position:absolute;left:0;top:64px;min-width:230px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 18px 40px rgba(15,23,42,.14);padding:8px;z-index:100}.nav-dropdown:last-child .dropdown-menu{left:auto;right:0}.dropdown-menu a{display:block;padding:12px 14px;color:#071b3d;text-decoration:none;border-radius:12px;font-weight:900;font-size:15px}.dropdown-menu a:hover{background:#eef4ff;color:var(--blue)}.nav-dropdown:hover .dropdown-menu,.nav-dropdown:focus-within .dropdown-menu{display:block}.nav-brand-icon{width:38px;height:38px;display:block;transition:.25s ease}.nav-brand-icon:hover{transform:rotate(12deg) scale(1.08)}.menu-toggle{display:none}.hamb{display:none;font-size:32px;cursor:pointer;color:#071b3d;line-height:1}.mobile-panel{display:none}
.hero{background:linear-gradient(100deg,#fff,#eef4ff);border-bottom:1px solid var(--line)}.hero .wrap{padding:44px 22px 36px}.badge{display:inline-flex;background:var(--soft);border:1px solid #bfdbfe;color:var(--blue);border-radius:999px;padding:8px 12px;font-weight:900;margin-bottom:14px}h1{margin:0 0 12px;font-size:clamp(32px,4.5vw,54px);line-height:1.08}.lead{margin:0;max-width:900px;color:#334663;font-size:19px;line-height:1.48}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:24px;max-width:760px}.stat{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:var(--shadow)}.stat strong{font-size:28px;display:block;color:var(--blue)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:10px;padding:12px 18px;font-weight:900}.btn-primary{background:var(--blue);color:#fff}.btn-secondary{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.toc-bar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:72px;z-index:20;box-shadow:0 6px 18px rgba(15,23,42,.05)}.toc{display:flex;flex-wrap:wrap;gap:8px;padding:14px 22px}.toc a{color:#172554;background:#f8fafc;border:1px solid var(--line);border-radius:999px;padding:7px 12px;text-decoration:none;font-weight:900;font-size:14px}.toc a:hover{background:var(--soft);color:var(--blue)}.toc a.is-active{background:var(--blue);border-color:var(--blue);color:#fff}
main.wrap{padding-top:28px;padding-bottom:58px}.info{background:#fff;border:1px solid var(--line);border-left:6px solid var(--blue);border-radius:18px;box-shadow:var(--shadow);padding:18px 20px;color:#334663;margin-bottom:22px;line-height:1.5}.paper-group{margin:34px 0}.paper-group>h2{font-size:30px;margin:0 0 16px;color:#172554}.task-card{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);margin:18px 0;overflow:hidden;scroll-margin-top:150px}.task-card-head{background:var(--blue);color:#fff;padding:16px 20px;display:flex;justify-content:space-between;gap:18px;align-items:center}.task-card-head h3{margin:4px 0 0;font-size:22px}.paper-label{font-weight:900;opacity:.92;font-size:14px}.open-link{background:#fff;color:var(--blue);text-decoration:none;font-weight:900;padding:10px 14px;border-radius:10px;white-space:nowrap}.task-image-wrap{padding:18px;background:#f8fafc}.task-image-wrap img{display:block;width:100%;max-width:800px;margin:0 auto;height:auto;background:#fff;border:1px solid var(--line);border-radius:14px}.task-details{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:0 18px 18px}details{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden}summary{cursor:pointer;padding:14px 16px;font-weight:900;color:#172554;background:#f8fafc}summary:hover{background:var(--soft);color:var(--blue)}.answer{padding:14px 16px;background:#e8f1ec;border-left:5px solid #2f6b4f;line-height:1.55}.solution{padding:14px 16px;background:#edf3ff;border-left:5px solid var(--blue);line-height:1.55}.solution p,.answer p{margin:8px 0}.calc-box{background:#fff;border:1px solid #cbd5e1;border-radius:12px;padding:12px 14px;margin:10px 0;font-size:18px;line-height:1.65;overflow-x:auto}.solution-answer{background:#fff7ed;border-left:5px solid #f59e0b;padding:12px 14px;border-radius:10px;margin-top:12px;font-weight:900}.helper-image-box,.parabola-image-box{background:#fff;border:1px solid #cbd5e1;border-radius:16px;padding:12px;margin:14px auto;max-width:760px}.helper-image-box img,.parabola-image-box img{display:block;width:100%;height:auto;border-radius:10px}footer{background:#1f2937;color:#d1d5db;text-align:center;padding:28px 20px}footer a{color:#fff;font-weight:900;text-decoration:none}
@media(max-width:1120px){.main-nav{display:none}.hamb{display:block;margin-left:auto}.logo{max-width:calc(100% - 48px);flex:1 1 auto}.logo-img,.logo img{height:27px;max-height:27px}.menu-toggle:checked~.mobile-panel{display:block;position:absolute;left:0;right:0;top:70px;background:white;padding:10px 22px 18px;box-shadow:0 18px 36px rgba(15,23,42,.15);border-top:1px solid var(--line)}.mobile-panel a{display:flex;align-items:center;justify-content:space-between;text-decoration:none;color:#071b3d;font-weight:900;padding:17px 4px;border-bottom:1px solid var(--line)}}@media(max-width:760px){.wrap{padding:0 16px}.hero .wrap{padding:34px 16px 28px}.toc-bar{position:relative;top:0}.toc{padding:12px 16px}.stats{grid-template-columns:1fr}.task-card-head{display:block}.open-link{display:inline-flex;margin-top:12px}.task-image-wrap{padding:10px}.task-details{grid-template-columns:1fr;padding:0 10px 12px}}


/* === MENU Z INDEX.HTML - UJEDNOLICONE === */
header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--line);
  box-shadow:0 8px 22px rgba(15,23,42,.06);
}
.top,
.compact-top{
  height:72px;
  min-height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding-top:0;
  padding-bottom:0;
  position:relative;
}
.logo{
  max-width:390px;
  min-width:0;
  flex:0 1 390px;
  display:flex;
  align-items:center;
  white-space:nowrap;
  color:var(--text);
  text-decoration:none;
}
.logo-img,
.logo img{
  height:29px;
  max-height:29px;
  max-width:100%;
  width:auto;
  object-fit:contain;
  display:block;
}
.main-nav{
  margin-left:auto;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:24px;
  font-size:16px;
  font-weight:900;
  white-space:nowrap;
  flex:0 0 auto;
}
.main-nav .nav-link,
.nav-button{
  color:#071b3d;
  text-decoration:none;
  padding:24px 0 22px;
  border:0;
  border-bottom:3px solid transparent;
  background:none;
  font:inherit;
  cursor:pointer;
  line-height:1;
}
.main-nav .nav-link:hover,
.nav-button:hover,
.nav-dropdown:focus-within .nav-button{
  color:var(--blue);
  border-bottom-color:var(--blue);
}
.nav-dropdown{position:relative;}
.dropdown-menu{
  display:none;
  position:absolute;
  left:0;
  top:64px;
  min-width:230px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:0 18px 40px rgba(15,23,42,.14);
  padding:8px;
  z-index:100;
}
.nav-dropdown:last-child .dropdown-menu{left:auto;right:0;}
.dropdown-menu a{
  display:block;
  padding:12px 14px;
  color:#071b3d;
  text-decoration:none;
  border-radius:12px;
  font-weight:900;
  font-size:15px;
}
.dropdown-menu a:hover{background:#eef4ff;color:var(--blue);}
.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu{display:block;}
.dropdown-disabled{opacity:.55;}
.dropdown-disabled:hover{background:#fff !important;color:#071b3d !important;}
.nav-brand-link{display:flex;align-items:center;margin-left:8px;}
.nav-brand-icon{width:38px;height:38px;display:block;transition:.25s ease;}
.nav-brand-icon:hover{transform:rotate(12deg) scale(1.08);}
.menu-toggle{display:none;}
.hamb{display:none;font-size:32px;cursor:pointer;color:#071b3d;line-height:1;}
.mobile-panel{display:none;}
.mobile-disabled{opacity:.6;}
@media(max-width:1120px){
  .compact-top{height:70px;min-height:70px;}
  .logo{max-width:calc(100% - 48px);flex:1 1 auto;}
  .logo-img,.logo img{height:27px;max-height:27px;}
  .main-nav{display:none;}
  .hamb{display:block;margin-left:auto;}
  .menu-toggle:checked~.mobile-panel{
    display:block;
    position:absolute;
    left:0;
    right:0;
    top:70px;
    background:white;
    padding:10px 22px 18px;
    box-shadow:0 18px 36px rgba(15,23,42,.15);
    border-top:1px solid var(--line);
  }
  .mobile-panel a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    text-decoration:none;
    color:#071b3d;
    font-weight:900;
    padding:17px 4px;
    border-bottom:1px solid var(--line);
  }
  .mobile-panel a:hover{color:var(--blue);}
  .mobile-panel details{border-bottom:1px solid var(--line);}
  .mobile-panel summary{
    display:flex;
    align-items:center;
    justify-content:space-between;
    cursor:pointer;
    color:#071b3d;
    font-weight:900;
    padding:17px 4px;
    list-style:none;
  }
  .mobile-panel summary::-webkit-details-marker{display:none;}
  .mobile-panel summary::after{content:"▾";font-size:15px;color:#315ea8;margin-left:10px;}
  .mobile-panel details[open] summary::after{content:"▴";}
  .mobile-panel details a{padding-left:22px !important;}
}
@media(max-width:560px){
  .wrap{padding-left:16px;padding-right:16px;}
  .logo-img,.logo img{height:23px;max-height:23px;}
  .hamb{font-size:30px;}
}


.anchor-point{height:1px;}

.syllabus-warning{display:inline-flex;align-items:center;margin-left:10px;padding:5px 9px;border-radius:999px;background:#fff3cd;color:#7a4b00;border:1px solid #f1cf70;font-size:13px;font-weight:900;vertical-align:middle}.task-card[data-curriculum="old"]{border-color:#e7c45e}@media(max-width:760px){.syllabus-warning{display:flex;width:max-content;margin:8px 0 0}}

/* === PANEL FILTRÓW RODZAJU ZADAŃ === */
.task-filter-panel{margin:14px 0 18px;padding:14px 18px;max-width:900px;border:1.5px solid #3f73c8;border-radius:18px;background:linear-gradient(135deg,#edf4ff 0%,#f7f3ff 100%);box-shadow:0 10px 24px rgba(40,83,150,.12)}
.filter-topline{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}
.filter-title{font-size:20px;font-weight:900;color:#132a58}
.filter-status{font-weight:800;color:#43577a;white-space:nowrap}
.filter-options{display:flex;gap:12px;flex-wrap:wrap}
.filter-card{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1.5px solid #9eb9e7;border-radius:14px;background:#fff;min-width:250px;cursor:pointer}
.filter-card:hover{background:#f8fbff;border-color:#6f96d8}
.filter-card input{width:20px;height:20px;accent-color:#315ea8;cursor:pointer}
.filter-text{display:flex;flex-direction:column}
.filter-text strong{font-size:16px}
.filter-text small{font-size:12px;color:#556}
@media(max-width:560px){.filter-topline{align-items:flex-start}.filter-options{display:grid;grid-template-columns:1fr;width:100%}.filter-card{min-width:0;width:100%}}

/* === JEDNOLITY PANEL FILTRÓW RODZAJU ZADAŃ === */
.task-filter-panel{margin:14px 0 18px;padding:14px 18px;max-width:900px;border:1.5px solid #3f73c8;border-radius:18px;background:linear-gradient(135deg,#edf4ff 0%,#f7f3ff 100%);box-shadow:0 10px 24px rgba(40,83,150,.12)}
.filter-topline{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}
.filter-title{font-size:20px;font-weight:900;color:#132a58}
.filter-status{font-weight:800;color:#43577a;white-space:nowrap}
.filter-options{display:flex;gap:12px;flex-wrap:wrap}
.filter-card{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1.5px solid #9eb9e7;border-radius:14px;background:#fff;min-width:250px;cursor:pointer;transition:.18s ease}
.filter-card:hover{background:#f8fbff;border-color:#6f96d8}
.filter-card input{width:20px;height:20px;accent-color:#315ea8;cursor:pointer}
.filter-text{display:flex;flex-direction:column}
.filter-text strong{font-size:16px}
.filter-text small{font-size:12px;color:#556}
.filter-card.is-disabled{background:#eef0f3;border-color:#c8cdd5;color:#8a9099;cursor:not-allowed;box-shadow:none}
.filter-card.is-disabled:hover{background:#eef0f3;border-color:#c8cdd5}
.filter-card.is-disabled .filter-text small{color:#969ca5}
.filter-card.is-disabled input{cursor:not-allowed;accent-color:#a8adb5}
@media(max-width:560px){.filter-topline{align-items:flex-start}.filter-options{display:grid;grid-template-columns:1fr;width:100%}.filter-card{min-width:0;width:100%}}

.category-breadcrumb{display:flex;flex-wrap:wrap;gap:7px;align-items:center;padding-top:24px;color:#536176;font-size:14px}.category-breadcrumb a{color:#315ea8;text-decoration:none;font-weight:800}.category-breadcrumb strong{color:#14213d}.category-breadcrumb span{color:#8a98aa}