/* Zigma silver / sapphire game navigation. */
html{scrollbar-color:#477da6 #091b2d;scrollbar-width:thin}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:#091b2d}::-webkit-scrollbar-thumb{background:linear-gradient(#85c9ef,#315f8c);border:2px solid #091b2d;border-radius:8px}::-webkit-scrollbar-thumb:hover{background:#9bdcff}
.site-header{background:#10263b;border-bottom:1px solid #89bada70;box-shadow:0 2px 0 #020c18,0 4px 16px #03122166;backdrop-filter:none}
.site-header::after{content:"";position:absolute;bottom:3px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,#8ac9f04d,transparent);pointer-events:none}
.site-header .brand.nav-icon{width:108px;height:108px;overflow:visible;border-radius:50%;background:#10263b;border:1px solid #86b1d050;box-shadow:0 5px 0 #10263b,0 8px 18px #020d2344;display:grid;place-items:center;align-self:flex-start;margin-top:5px;z-index:2}
.site-header .brand.nav-icon img{position:static;inset:auto;width:82px;height:82px;max-width:100%;border-radius:50%;object-fit:contain;filter:drop-shadow(0 0 7px #67c3ff35)}
.site-header nav{gap:4px;height:100%}.site-header nav a{position:relative;display:flex;align-items:center;justify-content:center;min-height:52px;padding:14px 11px;color:#d1dfeb;font-weight:500;transition:color .2s,text-shadow .2s,filter .2s;background:transparent}
.site-header nav a:not(.nav-login):not(.nav-register)::before{content:"";position:absolute;inset:4px 0 0;background:radial-gradient(ellipse at 50% 100%,#53bfff30,transparent 68%);opacity:0;transition:opacity .25s}
.site-header nav a:not(.nav-login):not(.nav-register)::after{content:"";position:absolute;left:12%;right:12%;bottom:2px;height:2px;background:linear-gradient(90deg,transparent,#78d3ff,#f2fcff,#78d3ff,transparent);box-shadow:0 2px 10px #48bbff;transform:scaleX(0);transition:transform .25s}
.site-header nav a:hover,.site-header nav a:focus-visible,.site-header nav a.current{color:#fff;text-shadow:0 0 10px #86d6ff;background-color:transparent}
.site-header nav a:hover::before,.site-header nav a:focus-visible::before,.site-header nav a.current::before{opacity:1}.site-header nav a:hover::after,.site-header nav a:focus-visible::after,.site-header nav a.current::after{transform:scaleX(1)}
.site-header nav a.current:not(.nav-login):not(.nav-register){background-image:linear-gradient(45deg,transparent 35%,#bef0ff 36%,#fff 64%,transparent 65%);background-size:9px 9px;background-position:center bottom;background-repeat:no-repeat}
.site-header nav .nav-login,.site-header nav .nav-register,.hero-actions .button{background:transparent url('../img/ui/button-sapphire-v1.webp') center/100% 100% no-repeat;border:0;border-radius:0;box-shadow:none;color:#f1f8ff;text-shadow:0 1px 3px #001528;min-height:54px;padding:15px 24px;margin-left:4px;filter:drop-shadow(0 3px 5px #020d2444)}
.site-header nav .nav-register{filter:brightness(1.18) drop-shadow(0 0 5px #59baff30)}
.site-header nav .nav-login:hover,.site-header nav .nav-register:hover,.hero-actions .button:hover{filter:brightness(1.3) drop-shadow(0 0 8px #52bbff66)}
.site-header nav .nav-login.current,.site-header nav .nav-register.current{filter:brightness(1.3) drop-shadow(0 0 8px #52bbff66)}
.hero-actions .button{min-width:205px;min-height:64px;margin-left:0;padding:18px 30px}.hero-actions .button-silver{filter:saturate(.55) brightness(1.25)}
.home-loading .site-header .brand.nav-icon{opacity:0;transform:translateY(-24px) scale(.85)}
.home-entered .site-header .brand.nav-icon{animation:nav-logo-enter .9s cubic-bezier(.2,.8,.25,1) both}
@keyframes nav-logo-enter{from{opacity:0;transform:translateY(-24px) scale(.85)}to{opacity:1;transform:translateY(0) scale(1)}}
@media(min-width:1081px) and (max-width:1250px){.site-header nav a{font-size:10px;padding:12px 7px}.site-header nav .nav-login,.site-header nav .nav-register{padding:13px 18px;min-height:48px}.site-header .brand.nav-icon{width:100px;height:100px}.site-header .brand.nav-icon img{width:76px;height:76px}}
@media(max-width:1080px){.site-header .brand.nav-icon{width:88px;height:88px;margin-top:2px}.site-header .brand.nav-icon img{width:68px;height:68px}.site-header nav{height:auto;padding-top:26px;background:#10263b}.site-header nav a{min-height:50px}.site-header nav .nav-login,.site-header nav .nav-register{margin:0;padding:14px 22px;border:0}.hero-actions .button{min-width:0}}
@media(max-width:760px){.hero-centered .hero-actions .button{min-height:57px;padding:15px 16px}.site-header .brand.nav-icon{width:86px;height:86px}.site-header .brand.nav-icon img{width:66px;height:66px}}
@media(prefers-reduced-motion:reduce){.home-entered .site-header .brand.nav-icon{animation:none}.site-header nav a,.site-header nav a::before,.site-header nav a::after{transition:none}}

/* Selected menu: continuous blue light and a centered crystal, below the label. */
.site-header nav a.current:not(.nav-login):not(.nav-register){background-image:none}
.site-header nav a:not(.nav-login):not(.nav-register)::before{inset:auto;left:calc(50% - 4px);bottom:-1px;width:8px;height:8px;transform:rotate(45deg);border:1px solid #dcf8ff;background:linear-gradient(135deg,#fff,#4ebcff 48%,#efffff);box-shadow:0 0 4px #fff,0 0 12px #59c8ff;z-index:2;pointer-events:none}
.site-header nav a:not(.nav-login):not(.nav-register)::after{left:4%;right:4%;bottom:2px;pointer-events:none}
/* Override the older generic hover background shorthand, which erased the artwork. */
.site-header nav a.nav-login,.site-header nav a.nav-register,
.site-header nav a.nav-login:hover,.site-header nav a.nav-register:hover,
.site-header nav a.nav-login:focus-visible,.site-header nav a.nav-register:focus-visible,
.site-header nav a.nav-login.current,.site-header nav a.nav-register.current{background:transparent url('../img/ui/button-sapphire-v1.webp') center/100% 100% no-repeat}
.hero-centered .hero-actions .button{box-shadow:none;position:relative;isolation:isolate}
.hero-centered .hero-actions .button-silver::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:2;background:linear-gradient(110deg,transparent 40%,#ffffff15 44%,#ffffffb0 49%,#ffffff35 53%,transparent 58%) 180% 0/260% 100% no-repeat;mask:url('../img/ui/button-sapphire-v1.webp') center/100% 100% no-repeat;-webkit-mask:url('../img/ui/button-sapphire-v1.webp') center/100% 100% no-repeat;animation:register-sheen 9s linear infinite}
@keyframes register-sheen{0%,8%{background-position:180% 0;opacity:0}15%{opacity:.85}75%{background-position:-80% 0;opacity:.85}82%,100%{background-position:-80% 0;opacity:0}}
.home-loading .hero-actions .button-silver::after{animation-play-state:paused}
@media(prefers-reduced-motion:reduce){.hero-centered .hero-actions .button-silver::after{animation:none;display:none}}

/* Match the base pseudo-element specificity so selected/hover states are visible. */
.site-header nav a:not(.nav-login):not(.nav-register):is(.current,:hover,:focus-visible)::before{opacity:1}
.site-header nav a:not(.nav-login):not(.nav-register):is(.current,:hover,:focus-visible)::after{transform:scaleX(1)}
@media(min-width:1081px){.site-header nav a:not(.nav-login):not(.nav-register){align-self:stretch}}