*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  color: #fff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { scrollbar-width: none; }

#intro-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

#intro-inner {
  font-size: clamp(1.5rem, 3.5vw, 3rem);
  font-weight: 500;
  color: #fff;
  letter-spacing: -0.01em;
}

#intro-name,
#intro-sep {
  opacity: 0;
  transition: opacity 0.8s ease;
  display: inline;
}

#main-app {
  opacity: 0;
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

#noise-canvas {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100vw;
  height: 100vh;
  border: none;
  z-index: 0;
  pointer-events: none;
}

#layout {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.desktop-nav-wrap {
  position: absolute;
  top: 80px;
  right: 48px;
  text-align: right;
}

.mobile-nav-wrap {
  position: absolute;
  bottom: 40px;
  left: 24px;
  display: none;
}

@media (max-width: 768px) {
  .desktop-nav-wrap { display: none; }
  .mobile-nav-wrap  { display: block; }
}

#content-area {
  position: absolute;
  top: 50%;
  left: 48px;
  transform: translateY(-50%);
  max-width: 62%;
  max-height: 60vh;
  overflow-y: auto;
  transition: opacity 0.3s ease;
}

@media (max-width: 768px) {
  #content-area {
    left: 24px;
    right: 24px;
    width: auto;
    max-width: none;
    top: 32px;
    transform: none;
    max-height: calc(100dvh - 240px);
    overflow-y: auto;
  }
}

#footer {
  position: absolute;
  bottom: 32px;
  right: 48px;
  text-align: right;
  color: #9ca3af;
  font-size: 0.975rem;
  font-weight: 400;
  line-height: 1.6;
}

.mask-top {
  -webkit-mask-image: linear-gradient(to bottom, transparent, black 15%, black);
  mask-image: linear-gradient(to bottom, transparent, black 15%, black);
}
.mask-bottom {
  -webkit-mask-image: linear-gradient(to bottom, black, black 85%, transparent);
  mask-image: linear-gradient(to bottom, black, black 85%, transparent);
}
.mask-both {
  -webkit-mask-image: linear-gradient(to bottom, transparent, black 15%, black 85%, transparent);
  mask-image: linear-gradient(to bottom, transparent, black 15%, black 85%, transparent);
}

.nav-link {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.025em;
  color: #fff;
  display: block;
  cursor: pointer;
  transition: opacity 0.3s ease;
  text-decoration: none;
}
.nav-link:hover { opacity: 0.4; }

@media (max-width: 768px) {
  .nav-link { font-size: 1.3rem; }
  .nav-name  { display: none; }
}

.ext-link {
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.2s ease;
}
.ext-link:hover { opacity: 0.6; }