@charset "UTF-8";
body {
  position: relative;
  background-color: var(--color-background-underlying);
}
body::before {
  content: "";
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  z-index: -1;
  pointer-events: none;
  /* Soft purple and blue ambient light */
  background: radial-gradient(ellipse at 50% 10%, rgba(168, 127, 251, 0.08) 0%, transparent 60%), radial-gradient(ellipse at 20% 80%, rgba(80, 100, 255, 0.05) 0%, transparent 50%), radial-gradient(ellipse at 80% 50%, rgba(120, 80, 255, 0.04) 0%, transparent 50%);
}

.card,
.nav,
#skip-to-content {
  background-color: var(--color-background-primary) !important;
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--color-accent-rgb), 0.35);
  box-shadow: var(--shadow-lg), var(--glow-accent);
}

.hero .title {
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  /* Use a slightly transparent text-shadow instead of hardcoded white */
  text-shadow: 0 4px 24px var(--color-border-primary);
}

.hero .subtitle {
  color: var(--color-text-secondary);
  font-weight: 400;
}

.button,
button {
  border-radius: var(--radius-full);
  background: var(--color-background-secondary);
  border: 1px solid var(--color-border-secondary);
  color: var(--color-text-primary);
  backdrop-filter: blur(12px);
  transition: all 0.2s ease;
}
.button:hover,
button:hover {
  background: rgba(var(--color-accent-rgb), 0.15);
  border-color: var(--color-background-accent);
  color: var(--color-text-primary-hover);
  box-shadow: var(--glow-accent-strong);
}

@keyframes pageLoadFade {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.99);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
.container {
  animation: pageLoadFade 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

:root {
  --cursor-x: 50%;
  --cursor-y: 50%;
}

body::after {
  content: "";
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--color-accent-rgb), 0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.5s ease;
  mix-blend-mode: screen;
  left: var(--cursor-x);
  top: var(--cursor-y);
  transform: translate(-50%, -50%);
}
body.cursor-active::after {
  opacity: 1;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-background-underlying);
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

::-moz-selection {
  background: rgba(var(--color-accent-rgb), 0.3);
  color: #ffffff;
}

::selection {
  background: rgba(var(--color-accent-rgb), 0.3);
  color: #ffffff;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav-item.color-scheme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  padding: 2px;
  gap: 2px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-primary);
  background-color: var(--color-background-primary-translucent);
  backdrop-filter: blur(8px);
  margin-top: 0;
  width: -moz-max-content;
  width: max-content;
  transition: all 0.3s ease;
}
.nav-item.color-scheme-toggle:hover {
  box-shadow: var(--glow-accent);
  border-color: rgba(var(--color-accent-rgb), 0.3);
}
.nav-item.color-scheme-toggle label {
  display: flex;
  margin: 0;
}
.nav-item.color-scheme-toggle label input {
  position: absolute;
  width: 0px;
  height: 0px;
  margin: 0;
  opacity: 0;
}
.nav-item.color-scheme-toggle label input:checked + span {
  color: var(--color-background-accent-contrast);
  background-color: var(--color-background-accent);
  box-shadow: var(--glow-accent-strong);
}
.nav-item.color-scheme-toggle label span {
  font-size: 14px;
  padding: 4px;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  cursor: pointer;
}
.nav-item.color-scheme-toggle label span:hover {
  color: var(--color-text-primary);
  background-color: rgba(var(--color-accent-rgb), 0.1);
}

#theme-particle-toggle {
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  width: 36px;
  height: 36px;
  padding: 0; /* 抵消 nav-item 默认的 padding，防止被撑成椭圆 */
  flex-shrink: 0;
  box-sizing: border-box;
  border-radius: 50%;
  border: 1px solid var(--color-border-primary);
  background-color: var(--color-background-primary-translucent);
  backdrop-filter: blur(8px);
  color: var(--color-text-secondary);
  font-size: 16px;
  transition: all 0.3s ease;
}
#theme-particle-toggle:hover {
  color: var(--color-text-primary);
  background-color: rgba(var(--color-accent-rgb), 0.1);
  border-color: rgba(var(--color-accent-rgb), 0.3);
  box-shadow: var(--glow-accent);
}
#theme-particle-toggle.active {
  color: var(--color-background-accent-contrast);
  background-color: var(--color-background-accent);
  border-color: var(--color-background-accent);
  box-shadow: var(--glow-accent-strong);
}