/* GLOBAL */
body {
  margin: 0;
  padding: 0;
  font-family: "Inter", system-ui, sans-serif;
  background: #000;
  color: #fff;
  overflow-x: hidden;
}

/* COSMIC BACKGROUND CANVAS */
#bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
}

/* HERO SECTION */
.hero {
  text-align: center;
  padding-top: 18vh;
  padding-bottom: 10vh;
  position: relative;
  z-index: 10;
}

.hero h1 {
  font-size: 3.5rem;
  letter-spacing: 2px;
  margin-bottom: 0.25rem;
}

.sub {
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  opacity: 0.8;
  margin-bottom: 1.5rem;
}

.tagline {
  font-size: 1.1rem;
  opacity: 0.85;
  margin-bottom: 2.2rem;
}

.cta {
  padding: 14px 32px;
  font-size: 1.05rem;
  border: none;
  border-radius: 999px;
  background: linear-gradient(90deg, #4cc9f0, #4361ee);
  color: white;
  cursor: pointer;
  transition: 0.25s ease;
  box-shadow: 0 0 18px rgba(76, 201, 240, 0.35);
}

.cta:hover {
  transform: translateY(-2px) scale(1.03);
  background: linear-gradient(90deg, #4895ef, #7209b7);
  box-shadow: 0 0 26px rgba(114, 9, 183, 0.5);
}

/* NAVIGATION TABS */
.tabs {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 20px;
  position: relative;
  z-index: 10;
}

.tab {
  padding: 10px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(76,201,240,0.3);
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  transition: 0.25s ease;
}

.tab:hover {
  background: rgba(76,201,240,0.15);
}

.tab.active {
  background: rgba(76,201,240,0.25);
  border-color: #4cc9f0;
}

/* VIEWER PANEL */
.viewer-panel {
  width: 100%;
  max-width: 1000px;
  margin: 40px auto;
  padding: 20px;
  border-radius: 14px;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(8px);
  box-shadow: 0 0 22px rgba(76,201,240,0.25);
  position: relative;
  z-index: 10;
}

.viewer-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
  opacity: 0.9;
  letter-spacing: 1px;
}

.viewer-box {
  width: 100%;
  height: 500px;
  border-radius: 12px;
  border: 1px solid rgba(76,201,240,0.3);
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-placeholder {
  opacity: 0.6;
  font-size: 1.1rem;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 40px 0;
  opacity: 0.5;
  font-size: 0.9rem;
  z-index: 10;
  position: relative;
}