:root {
  --text: #f7f8fa;
  --overlay: rgba(0, 0, 0, 0.45);
  --btn-bg: rgba(255, 255, 255, 0.15);
  --btn-border: rgba(255, 255, 255, 0.75);
  --btn-hover: rgba(255, 255, 255, 0.3);
}

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

html,
body {
  width: 100%;
  height: 100%;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.intro-page {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.bg-video {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: translate(-50%, -50%);
}

.overlay {
  position: absolute;
  inset: 0;
  background: var(--overlay);
}

.intro-content {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: grid;
  place-content: center;
  gap: 1.2rem;
  text-align: center;
  color: var(--text);
  padding: 1rem;
}

.intro-content h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  letter-spacing: 0.08em;
}

.intro-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.intro-content > :not(.intro-image) {
  position: relative;
  z-index: 1;
}

.enter-btn {
  justify-self: center;
  min-width: 150px;
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.enter-btn:hover {
  background: var(--btn-hover);
  transform: translateY(-2px);
}

.enter-btn:active {
  transform: translateY(0);
}