.shuffle-toggle {
  display: flex;
  justify-content: flex-end;
  margin-top: -44px;
  margin-bottom: 28px;
}
.shuffle-switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.shuffle-switch input {
  display: none;
}
.shuffle-slider {
  position: relative;
  width: 40px;
  height: 22px;
  background: #d2d2d7;
  border-radius: 11px;
  transition: background 0.2s;
  flex-shrink: 0;
}
.shuffle-slider::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}
.shuffle-switch input:checked + .shuffle-slider {
  background: #34c759;
}
.shuffle-switch input:checked + .shuffle-slider::after {
  transform: translateX(18px);
}
.shuffle-label {
  font-size: 13px;
  color: #86868b;
  font-weight: 500;
}
html.dark .shuffle-label {
  color: #a1a1a6;
}
html.dark .shuffle-switch input:checked + .shuffle-slider {
  background: #f5f5f7;
}
html.dark .shuffle-switch input:checked + .shuffle-slider::after {
  background: #1d1d1f;
}
@media (max-width: 768px) {
  .shuffle-toggle {
    display: none;
  }
  .shuffle-toggle.on-mobile {
    display: flex;
    margin-top: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .hero-scroll {
    animation: none;
  }
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition:
    background 0.3s ease,
    backdrop-filter 0.3s ease;
  padding: 0 24px;
}
nav.scrolled {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}
.nav-container {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 52px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: #1d1d1f;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: #1d1d1f;
  transition: width 0.3s;
}
.nav-links a:hover {
  color: #000000;
}
.nav-links a:hover::after {
  width: 100%;
}
.dark-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 20px;
  color: #86868b;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 8px;
}
.dark-toggle:hover {
  color: #1d1d1f;
  background: rgba(0, 0, 0, 0.05);
}
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #86868b;
  margin-right: 10px;
}
.lang-switch a {
  color: #86868b;
  text-decoration: none;
  padding: 3px 7px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.lang-switch a:hover {
  color: #1d1d1f;
}
.lang-switch a.on {
  color: #1d1d1f;
  background: rgba(0, 0, 0, 0.06);
}
.lang-switch a.switching {
  opacity: 0.45;
  pointer-events: none;
}
body.lang-anim {
  animation: langFade 0.3s ease;
}
@keyframes langFade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}
html.dark .lang-switch a.on {
  color: #f5f5f7;
  background: rgba(255, 255, 255, 0.1);
}
html.dark .lang-switch a {
  color: #a1a1a6;
}
html.dark .lang-switch a:hover {
  color: #f5f5f7;
}
.lang-switch .sep {
  color: #d2d2d7;
}
.lang-switch a::after {
  display: none;
}
html.dark .dark-toggle {
  color: #86868b;
}
html.dark .dark-toggle:hover {
  color: #f5f5f7;
  background: rgba(255, 255, 255, 0.08);
}
.dark-toggle .ph-sun {
  display: none;
}
html.dark .dark-toggle .ph-moon {
  display: none;
}
html.dark .dark-toggle .ph-sun {
  display: inline;
}
.dark-toggle .ph-moon {
  display: inline;
}
html.dark .dark-toggle .ph-sun {
  display: inline;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 24px;
  color: #1d1d1f;
  padding: 0;
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  transition: background 0.2s;
}
.nav-toggle:hover {
  background: rgba(0, 0, 0, 0.05);
}
html.dark .nav-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100dvh;
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.5));
    backdrop-filter: blur(12px) saturate(160%);
    -webkit-backdrop-filter: blur(12px) saturate(160%);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    clip-path: inset(0 0 0 100%);
    will-change: backdrop-filter, clip-path;
    transition:
      clip-path 0.4s cubic-bezier(0.32, 0.72, 0, 1);
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.1);
    border-left: 1px solid rgba(255, 255, 255, 0.5);
    padding: 40px;
    z-index: 1001;
  }
  .nav-links.open {
    clip-path: inset(0);
  }
  .nav-links a {
    font-size: 18px;
  }
  .nav-toggle {
    display: flex;
    z-index: 1002;
  }
  html.dark .nav-links {
    background: linear-gradient(160deg, rgba(28, 28, 30, 0.7), rgba(28, 28, 30, 0.5));
    border-left: 1px solid rgba(255, 255, 255, 0.12);
  }
  html.dark .nav-links a {
    color: #f5f5f7;
  }
  html.dark .nav-links a:hover {
    color: #ffffff;
  }
  .lang-switch {
    font-size: 13px;
    margin-right: 0;
  }
  .lang-switch a {
    font-size: 13px;
  }
}