/* NAVBAR */
nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(10, 10, 10, 0.8); /* dark frosted glass */
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  padding: 14px 40px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.08); 
  box-shadow: 0 6px 28px rgba(0,0,0,0.55);
  z-index: 1000;
  min-width: 65%;
  max-width: 1100px;
  font-family: "Inter", "Segoe UI", "Roboto", sans-serif;
}

/* GLOBAL BLACK CIRCLE CURSOR (default everywhere) */
html, body, a, button, .scroll-arrow {
  cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24'><circle cx='12' cy='12' r='6' fill='white'/></svg>") 12 12, auto !important;
}

a, button, .btn-sponsor {
  cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='30' height='30'><circle cx='15' cy='15' r='8' fill='white'/></svg>") 15 15, pointer !important;
}

/* LOGO */
.logo {
  display: block;
  width: 50px;
  height: auto;
  z-index: 2;
}

.logo img {
  width: 100%;
  height: auto;
  display: block;
}

/* NAV LINKS */
.nav-links {
  display: flex;
  gap: 2.2rem;
  z-index: 2;
}

.nav-links a {
  text-decoration: none;
  font-weight: 500;
  padding: 6px 2px;
  transition: all 0.35s ease;
  color: #cfcfcf; /* silver-gray */
  position: relative;
  letter-spacing: 0.5px;
  font-size: 0.95rem;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1.5px;
  background: linear-gradient(90deg, #666, #aaa, #666);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s ease;
}

.nav-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-links a:hover {
  color: #f1f1f1;
  text-shadow: 0 0 10px rgba(255,255,255,0.4);
  transform: translateY(-2px);
}

/* SPONSOR BUTTON (PREMIUM SILVER) */
.btn-sponsor {
  background: linear-gradient(135deg, #2a2a2a, #111); /* deep black-to-dark-gray */
  color: #e0e0e0; /* metallic silver text */
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 12px;
  padding: 11px 28px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  position: relative;
  text-decoration: none;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border 0.35s ease;
  overflow: hidden;
  z-index: 1;
  box-shadow: inset 0 1px 3px rgba(255,255,255,0.08),
              0 4px 18px rgba(0,0,0,0.6);
}

/* subtle silver shimmer */
.btn-sponsor::before {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.3), transparent);
  transform: skewX(-20deg);
  transition: left 0.8s ease;
}

.btn-sponsor:hover::before {
  left: 130%;
}

.btn-sponsor:hover {
  transform: translateY(-2px) scale(1.03);
  border-color: rgba(255,255,255,0.35);
  box-shadow: 0 6px 20px rgba(255,255,255,0.15),
              inset 0 1px 4px rgba(255,255,255,0.1);
  background: linear-gradient(135deg, #333, #1a1a1a);
}

/* DARK NAV SPECIAL */
nav.dark {
  background: linear-gradient(145deg, #1c1c1c, #101010);
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 6px 26px rgba(0,0,0,0.7);
}

nav.dark .nav-links a { 
  color: #bdbdbd; 
}

nav.dark .nav-links a:hover { 
  color: #fff; 
}

nav.dark .btn-sponsor { 
  background: linear-gradient(135deg, #2e2e2e, #111);
}

html, body {
  min-height: 100%;
  overflow-y: scroll;     /* allow scrolling */
  scrollbar-width: none;  /* Firefox: hide scrollbar */
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
  display: none;          /* Chrome, Safari, Edge: hide scrollbar */
}