html {
    background-color: #000;
}

/* hero */
header.hero {
  position: relative;
  min-height: 320px;        
  display: grid;
  place-items: center;
  overflow: hidden;
  isolation: isolate;        
}

header.hero::before{
  content:"";
  position:absolute; inset:0;
  background: url("/css/img/headrbg.jpg") center / cover no-repeat;
  z-index: -1;
  /* lekki overlay, żeby tekst/nav był czytelny */
  filter: saturate(.95) contrast(.95) brightness(.9);
}

header.hero::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(0,0,0,.25), rgba(0,0,0,.15) 40%, rgba(0,0,0,0) 70%);
  z-index: -1;
}

@media (min-width: 1200px){
  header.hero::before{
    background-attachment: fixed;
  }
}

@media (prefers-reduced-motion: reduce){
  header.hero::before{
    background-attachment: scroll !important;
  }
}

.marginess {
    margin-right: 10px;
}
.activee {
    color: #ebc55c;
}
.dropdown-menu {
    border: none;
    border-radius: 0% 25% 5% 25%;
    background-color: rgba(255, 255, 255, 0.2);
}

.dropdown-menu .dropdown-item {
    color: #fff !important;
    font-size: 0.9rem;  
    padding: .4rem 1rem; 
}

.dropdown-menu .dropdown-item:hover,
.dropdown-menu .dropdown-item:focus {
    background-color: rgba(255, 255, 255, 0);
    color: #ebc55c !important; 
}

.container-h1{
    display: flex;
    justify-content: space-evenly;
    flex-wrap: wrap;
    align-items: center;
    padding-top: 2rem;
    gap: 10rem;
}
.diamond-napis{
  inline-size: clamp(350px, 46vw, 640px); 
  height: auto;
}

.diamond-logo {
    width: 400px;
    height: auto;
    max-width: 100%;
}

.header-sm-logo{
    width: 100px;
    height: auto;
    max-width: 100%;

}
.margines {
    width: 100%;
    max-width: 110rem;
    margin-inline: auto;
    padding-inline: var(--bs-gutter-x, 1rem);
}
header a {
    font-family: Verdana, Geneva, Tahoma, monospace;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: .15rem;
    margin-right:  40px;
    color: #999999;
    font-weight: bold;
}



:root { --brand:#ebc55c; }

.navbar .nav-link { position: relative; font-weight: 600; }

.nav-underline::after{
    content:"";
    position:absolute; left:.6rem; right:.6rem; bottom:.35rem;
    height:2px; background:transparent;
    transform:scaleX(0); transform-origin:center;
    transition:transform .22s ease, background-color .22s ease;
}
.nav-underline:hover::after{ background:var(--brand); transform:scaleX(1); }
.nav-link.active{ color:var(--brand) !important; }
.nav-link.active.nav-underline::after{ background:var(--brand); transform:scaleX(1); }

.navbar .dropdown-toggle.nav-underline::after{
    position: static; left:auto; right:auto; bottom:auto; height:auto;
    background: none !important; transform: none !important; transition: none !important;
}

.navbar .dropdown-toggle.nav-underline::before{
    content:"";
    position:absolute; left:.6rem; right:.6rem; bottom:.35rem;
    height:2px; background:transparent;
    transform:scaleX(0); transform-origin:center;
    transition:transform .22s ease, background-color .22s ease;
}
.navbar .dropdown-toggle.nav-underline:hover::before,
.navbar .dropdown-toggle.nav-underline[aria-expanded="true"]::before,
.navbar .dropdown-toggle.nav-underline.active::before{
    background:var(--brand);
    transform:scaleX(1);
}

body{
  background: rgb(0,0,0);
  background: linear-gradient(90deg, rgba(0,0,0,1) 31%, rgb(31, 31, 31) 100%, rgb(36, 30, 7) 100%);

  position: relative; 
}

body::before{
  content:"";
  position: fixed;
  inset: 0;

  background: url("/css/img/bg-img-blur.png") left center / auto 100% no-repeat;
  opacity: .16;
  pointer-events: none;
  z-index: 0;

  -webkit-mask-image:
    linear-gradient(
      to right,
      #000 0%,
      #000 22%,
      rgba(0,0,0,.75) 40%,
      rgba(0,0,0,.35) 55%,
      rgba(0,0,0,.12) 66%,
      transparent 75%,
      transparent 100%
    ),
    linear-gradient(to bottom, transparent 0%, #000 20%, #000 80%, transparent 100%);
  -webkit-mask-composite: source-in;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-size: 100% 100%;

  mask-image:
    linear-gradient(
      to right,
      #000 0%,
      #000 22%,
      rgba(0,0,0,.75) 40%,
      rgba(0,0,0,.35) 55%,
      rgba(0,0,0,.12) 66%,
      transparent 75%,
      transparent 100%
    ),
    linear-gradient(to bottom, transparent 0%, #000 20%, #000 80%, transparent 100%);
  mask-composite: intersect;
  mask-repeat: no-repeat;
  mask-size: 100% 100%;

  filter: saturate(.9) contrast(.9);
}

header {position: relative; z-index: 3;}
main, footer{ position: relative; z-index: 1; }

.container-7xl {
    width: 100%;
    max-width: 80rem;
    margin-inline: auto;
    padding-inline: var(--bs-gutter-x, 1rem);
}
@media screen and (max-width: 1100px) {
    .diamond-logo{
      display: none;
    }
}

@media screen and (min-width: 200px) {
    main p,
    main td,
    footer p{
      font-size: 1rem;
    }
}
@media screen and (min-width: 600px) {
    main p,
    main td,
    footer p{
      font-size: 1rem;
    }
}
@media screen and (min-width: 900px) {
    main p,
    main td{
      font-size: 1rem;
    }
    footer p{
        font-size: 1rem;
    }
}

@media screen and (min-width: 200px) {
    main h2{
      font-size: 2rem;
    }
}
@media screen and (min-width: 600px) {
    main h2{
      font-size: 2rem;
    }
}
@media screen and (min-width: 1100px) {
    main h2{
      font-size: 2rem;
    }
}



.tab-cen td {
    border-bottom: 2px #ebc55c solid;
    width: 100%;
    max-width: 97%;
    padding: 10px;
    font-family: Verdana, Geneva, Tahoma, monospace;
    color: #999999;
    text-align: left;
}
.p-main {
    vertical-align: baseline;
    text-align: center;
    color: #999999;
    font-family: Verdana, Geneva, Tahoma, monospace;
    margin-top: 2rem;
} 
.h2home-left {
    font-family: Verdana, Geneva, Tahoma, monospace;
    font-weight: bold;
    color: #adadad;
    text-align: center;
    letter-spacing: 2px;
}

.margin-items {
    margin-top: 10%;
    margin-left: 3px;
    margin-right: 3px;
}

.section-desc{
    color:#999999;
    font-size: 1.1rem;
    line-height: 1.6;
    margin: .25rem 0 0.75rem;
    max-width: 65ch;   
    text-align: center;
  margin-left: auto;
  margin-right: auto;    
}

.note {
    background-color: #6b6b6b8f;
}

:root{
  --brand:#ebc55c; 
  --th: 3px;       
  --len: 123px;     
}
.p1, .p2, .p-sr{
  position: relative;
  padding: 10px 12px;
  color: #999999;
    font-family: Verdana, Geneva, Tahoma, monospace;

}

.p1::before, .p1::after{
  content:""; position:absolute; border-radius:2px;
}
.p1::before{
  left:0; top:0; height:var(--th); width:var(--len);
  background: linear-gradient(90deg, var(--brand), rgba(235,197,92,0));
}
.p1::after{
  left:0; top:0; width:var(--th); height:var(--len);
  background: linear-gradient(180deg, var(--brand), rgba(235,197,92,0));
}
.p1{ text-align:left; }

.p2::before, .p2::after{
  content:""; position:absolute; border-radius:2px;
}
.p2::before{ 
  right:0; top:0; height:var(--th); width:var(--len);
  background: linear-gradient(270deg, var(--brand), rgba(235,197,92,0));
}
.p2::after{ 
  right:0; top:0; width:var(--th); height:var(--len);
  background: linear-gradient(180deg, var(--brand), rgba(235,197,92,0));
}
.p2{ text-align:right; }

.p-sr::before, .p-sr::after{
  content:""; position:absolute; top:0; height:var(--th); width:var(--len);
  border-radius:2px;
}
.p-sr::before{ left:0;
  background: linear-gradient(90deg, var(--brand), rgba(235,197,92,0));
}
.p-sr::after{ right:0;
  background: linear-gradient(270deg, var(--brand), rgba(235,197,92,0));
}
.p-sr{ text-align:center; }

.p1:hover::before,
.p2:hover::before,
.p-sr:hover::before,
.p1:hover::after,
.p2:hover::after,
.p-sr:hover::after{
  filter: brightness(1.05);
}


/* footer */

footer {
    border-top: #ebc55c 2px solid;
    max-width: 80vw;
    margin-top: 40px;
}
footer img {
    margin: 10px;    
}
.footer-logo img{
    margin-top: 2rem;
    width: clamp(150px, 15vw, 220px);
    height: auto;
    display: inline-block;
}
footer p {
    color: #999999;
    letter-spacing: 1px;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
}