/* Sticky header + scroll progress — all pages (requires :root colors on page) */

html {
  --site-nav-h: 78px;
}

html.site-nav-compact {
  --site-nav-h: 58px;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); }
}

.xp-bar {
  position: fixed;
  top: var(--site-nav-h);
  left: 0;
  right: 0;
  height: 6px;
  background: var(--bg-dark);
  z-index: 999;
  transition: top 0.35s cubic-bezier(0.33, 1, 0.68, 1);
}

.xp-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--pixel-green), var(--pixel-blue), var(--pixel-pink));
  transition: width 0.15s ease-out;
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 14, 23, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 3px solid var(--border-color);
  padding: 0 24px;
  transition: box-shadow 0.3s ease;
}

html.site-nav-compact nav {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}

.nav-inner {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--site-nav-h);
  transition: height 0.35s cubic-bezier(0.33, 1, 0.68, 1);
}

.nav-logo {
  font-family: 'Press Start 2P', cursive;
  font-size: 20px;
  color: var(--pixel-green);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: color 0.2s, font-size 0.35s cubic-bezier(0.33, 1, 0.68, 1);
}

html.site-nav-compact .nav-logo {
  font-size: 16px;
}

.nav-logo:hover {
  color: var(--pixel-yellow);
}

.nav-logo .heart {
  display: inline-block;
  animation: heartbeat 1s ease-in-out infinite;
}

.nav-links {
  display: flex;
  gap: 10px;
  list-style: none;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* ~+25% from previous 13px / 11px */
.nav-links a {
  font-family: 'Press Start 2P', cursive;
  font-size: 16px;
  color: var(--text-dim, #8b8598);
  text-decoration: none;
  padding: 10px 18px;
  border: 3px solid transparent;
  border-radius: 2px;
  transition: color 0.2s, font-size 0.35s cubic-bezier(0.33, 1, 0.68, 1),
    padding 0.35s cubic-bezier(0.33, 1, 0.68, 1), border-color 0.15s, background 0.15s;
  position: relative;
}

html.site-nav-compact .nav-links a {
  font-size: 14px;
  padding: 8px 13px;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--pixel-green, #2de2a6);
  border-color: var(--pixel-green, #2de2a6);
  background: rgba(45, 226, 166, 0.1);
}

.nav-links a.is-active {
  background: rgba(45, 226, 166, 0.16);
}

.nav-links a::before {
  content: '>';
  position: absolute;
  left: 5px;
  opacity: 0;
  transition: opacity 0.15s;
  color: var(--pixel-green);
}

.nav-links a:hover::before,
.nav-links a.is-active::before {
  opacity: 1;
}

.nav-links a:hover,
.nav-links a.is-active {
  padding-left: 25px;
}

html.site-nav-compact .nav-links a:hover,
html.site-nav-compact .nav-links a.is-active {
  padding-left: 22px;
}

.menu-toggle {
  display: none;
  background: none;
  border: 3px solid var(--border-color);
  color: var(--pixel-green);
  font-family: 'Press Start 2P', cursive;
  font-size: 22px;
  padding: 8px 12px;
  cursor: pointer;
  transition: font-size 0.35s ease, padding 0.35s ease, border-width 0.35s ease;
}

html.site-nav-compact .menu-toggle {
  font-size: 18px;
  padding: 6px 10px;
}

body.has-site-chrome main {
  padding-top: max(24px, calc(var(--site-nav-h) + 18px));
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--site-nav-h);
    left: 0;
    right: 0;
    background: rgba(15, 14, 23, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 18px;
    border-bottom: 3px solid var(--pixel-green, #2de2a6);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    align-items: stretch;
    justify-content: flex-start;
    gap: 6px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-family: 'Press Start 2P', cursive;
    font-size: 15px;
    color: var(--text-dim, #8b8598);
    text-decoration: none;
    padding: 12px 18px;
    border: 3px solid transparent;
  }

  html.site-nav-compact .nav-links a {
    font-size: 14px;
    padding: 10px 16px;
  }

  .nav-links a:hover,
  .nav-links a.is-active {
    padding-left: 28px;
  }

  html.site-nav-compact .nav-links a:hover,
  html.site-nav-compact .nav-links a.is-active {
    padding-left: 24px;
  }
}