:root {
  --black: #000;
  --white: #fff;
  --scroll: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: "Clear Sans", sans-serif;
  background: var(--black);
  color: var(--white);
  overflow-x: hidden;
}

.bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: -1;
}

.bg-container img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transform: scale(1.08);
  transition:
    opacity 2s cubic-bezier(0.4, 0, 0.2, 1),
    transform 2.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.bg-container img.active {
  opacity: 1;
  transform: scale(1);
}

.bg-container::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 30px 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
}

.logo {
  font-weight: 800;
  letter-spacing: 2px;
  font-size: 0.7rem;
  text-transform: uppercase;
  opacity: 0.7;
}

.close-link {
  text-decoration: none;
  color: var(--white);
  font-size: 24px;
  font-weight: 200;
}

section {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 10%;
  position: relative;
}

.text-content {
  max-width: 500px;
  z-index: 10;
  margin-top: 1vh;
}

.text-content h2,
.text-content h1,
.text-content p {
  opacity: 0;
  transform: translateY(20px);
  transition: all 1s cubic-bezier(0.2, 1, 0.3, 1);
}

section.is-visible .text-content h2 {
  opacity: 0.6;
  transform: translateY(0);
  transition-delay: 0.3s;
}

section.is-visible .text-content h1 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.5s;
}

section.is-visible .text-content p {
  opacity: 0.85;
  transform: translateY(0);
  transition-delay: 0.7s;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 3rem);
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -1.5px;
  line-height: 1.1;
}

p {
  font-size: 1.05rem;
  line-height: 1.7;
  font-weight: 400;
}

footer {
  position: absolute;
  bottom: 40px;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  letter-spacing: 4px;
  opacity: 0.3;
  z-index: 20;
}

.scroll-line {
  position: fixed;
  left: 40px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 100px;
  background: var(--scroll);
  z-index: 100;
}

.scroll-fill {
  width: 100%;
  height: 0%;
  background: var(--white);
  transition: height 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (max-width: 768px) {
  section {
    align-items: flex-end;
    padding-bottom: 20vh;
    text-align: left;
  }
  .text-content {
    margin-top: 0;
  }
  .bg-container img {
    object-position: 80% center;
  }
  footer {
    bottom: 20px;
  }
}