@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@200;300;400;600&family=Outfit:wght@300;500;700&family=Inter:wght@300;400&display=swap');

:root {
  --bg-past: #e3e3e3;
  --bg-future: #ffffff;
  --color-past-text: #000000;
  --color-future-text: #000000;
  --color-accent: #000000;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Montserrat', sans-serif;
  --font-brand: 'Outfit', sans-serif;
  --transition-speed: 0.7s;
  --transition-ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-future);
  color: var(--color-future-text);
  min-height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.split-container {
  display: flex;
  width: 100vw;
  height: 100dvh;
  position: relative;
  overflow: hidden;
}

.split-half {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 3rem;
  overflow: hidden;
  opacity: 0;
  text-decoration: none;
}

.split-half.left {
  background-color: var(--bg-past);
  border-right: 1px solid rgba(219, 219, 219, 0.05);
  cursor: default;
  z-index: 15;
  overflow: visible;
  animation: entryLeft 1.4s var(--transition-ease) forwards;
  transition: flex var(--transition-speed) var(--transition-ease);
}

.split-half.left > *:not(.split-divider) {
  transition: 
    filter var(--transition-speed) var(--transition-ease),
    opacity var(--transition-speed) var(--transition-ease);
}

.split-half.right {
  background-color: var(--bg-future);
  cursor: pointer;
  z-index: 10;
  animation: entryRight 1.4s var(--transition-ease) forwards;
  transition: 
    flex var(--transition-speed) var(--transition-ease),
    background-color var(--transition-speed) var(--transition-ease);
}

.split-container:has(.right:hover) .right {
  flex: 1.35;
  background-color: var(--bg-future);
}

.split-container:has(.right:hover) .left {
  flex: 0.65;
}

.split-container:has(.right:hover) .left > *:not(.split-divider) {
  filter: grayscale(100%) blur(3px);
  opacity: 0.25;
}

.split-half.right:active {
  background-color: #f9f9f9;
}

.logo-wrapper {
  width: 100%;
  max-width: 220px;
  margin-bottom: 2rem;
  transition: transform var(--transition-speed) var(--transition-ease);
  display: flex;
  justify-content: center;
  align-items: center;
}

.meta-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-past-text);
  margin-bottom: 1rem;
  opacity: 0.7;
}

.split-divider {
  position: absolute;
  top: 50%;
  right: 0;
  opacity: 0;
  pointer-events: none;
  z-index: 20;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: entryDivider 1.2s var(--transition-ease) 0.3s forwards;
  transition: transform var(--transition-speed) var(--transition-ease);
}

.divider-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: #ffffff;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 0, 0, 0.15);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  justify-content: center;
  align-items: center;
  transition: 
    background-color var(--transition-speed) var(--transition-ease),
    border-color var(--transition-speed) var(--transition-ease),
    box-shadow var(--transition-speed) var(--transition-ease);
}

.divider-arrow {
  width: 18px;
  height: 18px;
  stroke: var(--color-accent);
  stroke-width: 1.5;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke var(--transition-speed) var(--transition-ease), transform var(--transition-speed) var(--transition-ease);
}

.split-container:has(.right:hover) .split-divider {
  transform: translate(50%, -50%) scale(1.1);
}

.split-container:has(.right:hover) .divider-circle {
  background-color: #000000;
  border-color: #000000;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

.split-container:has(.right:hover) .divider-arrow {
  stroke: #ffffff;
  transform: translateX(2px);
}

.cta-text {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--color-future-text);
  margin-top: 1.5rem;
  opacity: 0;
  transform: translateY(15px);
  transition: 
    opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.split-half.right:hover .cta-text {
  opacity: 0.85;
  transform: translateY(0);
}

.vignette-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 80px rgba(0,0,0,0.05);
  opacity: 0.2;
  z-index: 5;
}

@media (max-width: 768px) {
  .split-container {
    flex-direction: column;
  }

  .split-half.left {
    border-right: none;
    border-bottom: 1px solid rgb(226, 226, 226);
    animation: entryLeftMobile 1.4s var(--transition-ease) forwards;
  }

  .split-half.right {
    animation: entryRightMobile 1.4s var(--transition-ease) forwards;
  }

  .split-container:has(.right:hover) .right {
    flex: 1.4;
  }

  .split-container:has(.right:hover) .left {
    flex: 0.6;
  }

  .split-divider {
    right: auto;
    bottom: 0;
    left: 50%;
    animation: entryDividerMobile 1.2s var(--transition-ease) 0.3s forwards;
  }

  .split-container:has(.right:hover) .split-divider {
    transform: translate(-50%, 50%) scale(1.1) rotate(90deg);
  }

  .logo-wrapper {
    max-width: 260px;
    margin-bottom: 1rem;
  }

  .cta-text {
    opacity: 0.6;
    transform: translateY(0);
    margin-top: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .split-half, .split-divider, .divider-circle, .divider-arrow, .cta-text, .logo-wrapper {
    transition: none !important;
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .split-container:has(.right:hover) .right {
    flex: 1;
  }
  .split-container:has(.right:hover) .left {
    flex: 1;
    filter: none;
    opacity: 0.6;
  }
}

@keyframes entryLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes entryRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes entryDivider {
  from {
    opacity: 0;
    transform: translate(50%, -50%) scale(0.5);
  }
  to {
    opacity: 1;
    transform: translate(50%, -50%) scale(1);
  }
}

@keyframes entryLeftMobile {
  from {
    opacity: 0;
    transform: translateY(-40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes entryRightMobile {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes entryDividerMobile {
  from {
    opacity: 0;
    transform: translate(-50%, 50%) scale(0.5) rotate(90deg);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 50%) scale(1) rotate(90deg);
  }
}