/* Shared header and persistent game registration for every public page. */
.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 0 clamp(20px, 5vw, 76px);
  color: #fff;
  background: linear-gradient(to bottom, rgba(3, 8, 20, .88), rgba(3, 8, 20, .28)), #050b18;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: background .25s ease, height .25s ease, box-shadow .25s ease;
}
.site-header::after { content: ""; position: absolute; right: clamp(20px, 5vw, 76px); bottom: -1px; width: 72px; height: 1px; background: #8fffd2; box-shadow: -12px 0 14px #8fffd2; }
.site-header.is-scrolled { height: 72px; background: rgba(4, 11, 26, .96); border-color: rgba(143, 255, 210, .14); box-shadow: 0 16px 42px rgba(0, 0, 0, .3); }
.brand { display: flex; align-items: center; width: clamp(190px, 18vw, 278px); min-width: 0; flex-shrink: 0; }
.brand img { width: 100%; display: block; filter: drop-shadow(0 0 16px rgba(85, 231, 255, .24)); }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: clamp(15px, 1.8vw, 30px); color: rgba(255, 255, 255, .76); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.site-nav > a, .site-nav > .nav-menu > summary { position: relative; padding: 11px 0; white-space: nowrap; }
.site-nav > a::after, .site-nav > .nav-menu > summary::after { content: ""; position: absolute; right: 0; bottom: 3px; left: 0; height: 1px; background: #8fffd2; box-shadow: 0 0 12px #8fffd2; transform: scaleX(0); transform-origin: right; transition: transform .22s ease; }
.site-nav > a:hover, .site-nav > a.is-active, .site-nav > .nav-menu > summary:hover, .site-nav > .nav-menu.is-active > summary, .site-nav > .nav-menu[open] > summary { color: #fff; }
.site-nav .nav-login { padding: 8px 10px; color: #8fffd2; border: 1px solid rgba(143,255,210,.55); }
.site-nav > a:hover::after, .site-nav > a.is-active::after, .site-nav > .nav-menu > summary:hover::after, .site-nav > .nav-menu.is-active > summary::after, .site-nav > .nav-menu[open] > summary::after { transform: scaleX(1); transform-origin: left; }
.site-header a:focus-visible, .site-header summary:focus-visible, .nav-toggle:focus-visible { outline: 2px solid #8fffd2; outline-offset: 5px; }
.nav-menu { position: relative; }
.nav-menu > summary { display: flex; align-items: center; gap: 7px; cursor: pointer; list-style: none; }
.nav-menu > summary::-webkit-details-marker { display: none; }
.nav-menu > summary::marker { content: ""; }
.nav-menu > summary i { width: 6px; height: 6px; flex-shrink: 0; margin-top: -3px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(45deg); transition: transform .2s ease; }
.nav-menu[open] > summary i { margin-top: 3px; transform: rotate(225deg); }
.nav-menu-panel { position: absolute; z-index: 5; top: calc(100% + 12px); left: -14px; min-width: 178px; display: grid; gap: 2px; padding: 9px; border: 1px solid rgba(143,255,210,.22); background: rgba(5,11,24,.98); box-shadow: 0 18px 38px rgba(0,0,0,.32); opacity: 0; visibility: hidden; transform: translateY(-6px); pointer-events: none; transition: opacity .18s ease, visibility .18s ease, transform .18s ease; }
.nav-menu-panel::before { content: ""; position: absolute; top: -7px; left: 22px; width: 12px; height: 12px; border-top: 1px solid rgba(143,255,210,.22); border-left: 1px solid rgba(143,255,210,.22); background: #050b18; transform: rotate(45deg); }
.nav-menu:hover > .nav-menu-panel, .nav-menu[open] > .nav-menu-panel, .nav-menu:focus-within > .nav-menu-panel { opacity: 1; visibility: visible; transform: translateY(0); pointer-events: auto; }
.nav-menu-panel a { position: relative; display: block; padding: 10px 12px; color: rgba(255,255,255,.75); font-size: 12px; letter-spacing: .04em; white-space: nowrap; }
.nav-menu-panel a:hover, .nav-menu-panel a.is-active { color: #050b18; background: #8fffd2; }
.site-header .nav-register { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 11px 15px 11px 18px; color: #050b18; background: #8fffd2; border: 1px solid #8fffd2; box-shadow: 4px 4px 0 rgba(85, 231, 255, .3), 0 0 22px rgba(57, 230, 163, .17); clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px)); transition: transform .2s ease, box-shadow .2s ease; }
.site-header .nav-register:hover { color: #050b18; transform: translate(2px, 2px); box-shadow: 2px 2px 0 rgba(85, 231, 255, .3), 0 0 30px rgba(57, 230, 163, .24); }
.nav-register { flex-shrink: 0; font-size: 13px; font-weight: 800; white-space: nowrap; }
.nav-register svg { flex-shrink: 0; }
.site-header .nav-register:focus-visible { outline: 2px solid #050b18; outline-offset: -5px; }
.nav-toggle { display: none; border: 0; background: transparent; }
@media (min-width: 1025px) and (max-width: 1600px) {
  .site-header { padding-inline: 24px; gap: 18px; }
  .brand { width: 150px; }
  .site-nav { gap: 12px; font-size: 11px; letter-spacing: .02em; }
  .site-nav .nav-login { padding-inline: 7px; }
  .site-header .nav-register { padding-inline: 13px; gap: 10px; font-size: 12px; }
}
@media (max-width: 1024px) {
  .site-header, .site-header.is-scrolled { height: 70px; padding-inline: 16px; gap: 12px; background: #050b18; }
  .brand { position: relative; z-index: 3; width: clamp(124px, 36vw, 176px); }
  .nav-toggle { position: relative; z-index: 3; flex-shrink: 0; width: 40px; height: 46px; display: grid; align-content: center; gap: 5px; padding: 8px; cursor: pointer; }
  .nav-toggle span { width: 25px; height: 2px; display: block; margin-left: auto; background: #fff; transition: transform .2s ease, opacity .2s ease; }
  .nav-toggle span:nth-child(2) { width: 18px; }
  .nav-toggle b { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-nav { position: fixed; z-index: 2; inset: 0; flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 6px; padding: 90px 30px 24px; overflow-y: auto; background: #050b18; visibility: hidden; transform: translateX(100%); transition: transform .3s ease, visibility .3s; }
  .site-nav.is-open { visibility: visible; transform: translateX(0); }
  .site-nav > a, .site-nav > .nav-menu { width: min(100%, 330px); }
  .site-nav > a, .site-nav > .nav-menu > summary { padding: 10px 0; font-size: 18px; }
  .site-nav > .nav-menu > summary { justify-content: space-between; }
  .nav-menu-panel { position: static; min-width: 0; display: none; gap: 0; padding: 4px 0 8px 18px; border: 0; background: transparent; box-shadow: none; opacity: 1; visibility: visible; transform: none; pointer-events: auto; }
  .nav-menu-panel::before { display: none; }
  .nav-menu[open] > .nav-menu-panel { display: grid; }
  .nav-menu-panel a { width: 100%; padding: 8px 0; color: rgba(255,255,255,.7); font-size: 16px; }
  .site-nav .nav-login { margin-top: 7px; padding: 12px 14px; text-align: center; }
  .site-header .nav-register { position: relative; z-index: 3; margin-left: auto; min-height: 44px; padding: 10px 12px; }
  .nav-register svg { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .site-header, .site-nav, .site-nav > a::after, .site-nav > .nav-menu > summary::after, .site-header .nav-register, .nav-toggle span { transition: none; }
}