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

body {
  min-height: 100vh;
  background-color: #0d0d0f;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
  font-family: sans-serif;
}

/* Geometric background */
.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
}

.bg svg {
  width: 100%;
  height: 100%;
}

/* Neon title */
.title {
  position: relative;
  z-index: 1;
  margin-top: 6vh;
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: transparent;
  -webkit-text-stroke: 2px #a855f7;
  text-shadow:
    0 0 10px #a855f7,
    0 0 30px #a855f7,
    0 0 60px #7c3aed,
    0 0 100px #7c3aed;
  user-select: none;
}

/* Tabs */
.tabs {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
}

.tab {
  padding: 0.6rem 2rem;
  border: 1px solid #a855f7;
  background: transparent;
  color: #a855f7;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.tab:hover {
  background: #a855f720;
  box-shadow: 0 0 12px #a855f7, 0 0 24px #7c3aed;
  color: #d8b4fe;
}

/* Back button */
.back-btn {
  position: fixed;
  top: 1.2rem;
  right: 1.5rem;
  z-index: 10;
  padding: 0.4rem 1.2rem;
  border: 1px solid #a855f7;
  background: transparent;
  color: #a855f7;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 0.2s, box-shadow 0.2s, color 0.2s;
}

.back-btn:hover {
  background: #a855f720;
  box-shadow: 0 0 10px #a855f7;
  color: #d8b4fe;
}