#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

html {
  scroll-behavior: smooth;
}

.bold {
  font-weight: 700;
}

header#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
  transition: opacity 0.5s ease;
  position: relative;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 3rem;
  font-weight: 300;
  letter-spacing: 2px;
  opacity: 0.6;
  text-transform: uppercase;
}

.stylish-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  width: 100%;
  max-width: 400px;
}

.stylish-divider .line {
  height: 2px;
  flex: 1;
  background: linear-gradient(90deg, transparent, var(--red2), transparent);
  opacity: 0.7;
}

.stylish-divider .diamond {
  width: 12px;
  height: 12px;
  background-color: var(--red);
  transform: rotate(45deg);
  box-shadow: 0 0 10px var(--red);
}

.fade-in-section {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  will-change: opacity, visibility;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: none;
}

.header-logo {
  width: 150px;
  height: 150px;
  margin-bottom: 1.5rem;
  /* Base Red Shadow */
  filter: drop-shadow(0 0 25px #ff0000);
  transition: width 0.3s ease, height 0.3s ease;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: auto;
}

body.lights-off-mode .header-logo {
  pointer-events: none;
}

body.theme-blue .header-logo {
  filter: drop-shadow(0 0 25px #ff0000) hue-rotate(210deg);
}

body.theme-green .header-logo {
  filter: drop-shadow(0 0 25px #ff0000) hue-rotate(120deg);
}

body.theme-gold .header-logo {
  filter: drop-shadow(0 0 25px #ff0000) hue-rotate(40deg);
}

.header-logo.animate-pop {
  animation: pop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

body.scrolled .header-logo {
  width: 128px;
  height: 128px;
}

.logo {
  font-size: 3.8rem;
  font-weight: 800;
  color: var(--red);
  text-shadow: 0 0 35px var(--red);
  margin-bottom: 1.5rem;
  transition: text-shadow 0.3s ease, color 0.3s ease;
}

.github-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--red2);
  text-decoration: none;
  font-weight: 600;
}

.github-link:hover {
  color: white;
}

main {
  max-width: 1000px;
  margin: auto;
  padding: 2rem;
  transition: opacity 0.5s ease;
}

section {
  margin-bottom: 4rem;
}

h2 {
  font-size: 2.2rem;
  margin-bottom: 1.2rem;
  color: var(--red2);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.6rem;
}

.card.interest-card {
  align-items: center;
  text-align: center;
  justify-content: center;
  padding: 2rem 1.6rem;
}

.interest-icon-wrapper {
  background: rgba(255, 255, 255, 0.05);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  box-shadow: 0 0 15px var(--red);
  transition: transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.card.interest-card:hover .interest-icon-wrapper {
  transform: scale(1.1) rotate(5deg);
  background: rgba(255, 0, 0, 0.15);
}

.interest-icon {
  width: 48px;
  height: 48px;
  filter: brightness(1.5);
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.6rem;

  border: 1px solid var(--red);
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.2);

  transition: transform 0.25s ease, box-shadow 0.25s ease, border 0.3s ease;

  display: flex;
  flex-direction: column;

  text-decoration: none;
  color: white;
  cursor: pointer;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 0 40px var(--red);
}

.card p {
  color: var(--muted);
  line-height: 1.6;
}

.small {
  font-size: 0.9rem;
  opacity: 0.85;
}

.badges {
  margin: 0.8rem 0 1rem;
  display: flex;
  gap: 0.6rem;
}

.icon {
  width: 28px;
  height: 28px;
  filter: brightness(2);
}

.rust-icon {
  filter: invert(1) brightness(1);
}

.bash-icon {
  filter: brightness(4);
}

.links {
  margin-top: auto;
  padding-top: 1.2rem;
  font-size: 1.2rem;
  color: var(--red2);
}

.links a {
  color: var(--red);
  font-weight: 600;
  text-decoration: none;
}

.links a:hover {
  color: white;
}

footer {
  text-align: center;
  margin-top: 4rem;
  padding-bottom: 2rem;
}

footer p {
  color: var(--muted);
  opacity: 0.5;
  font-size: 0.9rem;
}

#lights-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 1000;
  background: transparent;
  border: none;
  color: var(--red2);
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s ease, transform 0.2s ease, color 0.2s ease;
  padding: 8px;
}

#lights-toggle svg {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 0 5px rgba(0,0,0,0.5));
}

#lights-toggle:hover {
  opacity: 1;
  transform: scale(1.1);
  color: var(--text);
}

body.lights-off-mode #lights-toggle {
  color: var(--muted);
  opacity: 0.3;
}

body.lights-off-mode #lights-toggle:hover {
  opacity: 1;
  color: var(--text);
}

body.past-hero #lights-toggle {
  opacity: 0.2;
  transform: scale(0.8);
}

body.past-hero #lights-toggle:hover {
  opacity: 1;
  transform: scale(1.1);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--muted);
  opacity: 0.5;
  animation: bounce 2s infinite;
  transition: opacity 0.3s ease;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

body.scrolled .scroll-hint {
  opacity: 0;
  pointer-events: none;
}

body.lights-off-mode header,
body.lights-off-mode main {
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 768px) {
  html {
    scroll-behavior: auto;
  }
  
  * {
    transition-timing-function: linear !important;
    animation-timing-function: linear !important;
  }
}