/* ========================================
   VPKT Landing — Video Splash
   ======================================== */

:root {
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --color-white: #FFFFFF;
  --color-white-dim: rgba(255, 255, 255, 0.5);
  --color-white-faint: rgba(255, 255, 255, 0.15);
}

/* --- RESET --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html, body {
  height: 100%;
  overflow: hidden;
}
body {
  font-family: var(--font-ui);
  color: var(--color-white);
  background: #000;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- VIDEO BACKGROUND --- */
.video-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: #000;
}
.video-bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.5s ease;
}
.video-bg video.loaded {
  opacity: 1;
}
.video-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(0,0,0,0.05) 0%, rgba(0,0,0,0.4) 100%),
    linear-gradient(180deg, rgba(0,0,0,0.25) 0%, rgba(0,0,0,0.05) 35%, rgba(0,0,0,0.1) 65%, rgba(0,0,0,0.55) 100%);
}

/* --- SOUND TOGGLE --- */
.sound-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 50;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  color: var(--color-white);
  cursor: pointer;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.6s ease, transform 0.6s ease, background 0.3s ease, border-color 0.3s ease;
}
.sound-toggle.visible {
  opacity: 1;
  transform: translateY(0);
}
.sound-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}
.sound-toggle svg {
  width: 18px;
  height: 18px;
}
.sound-toggle .icon-unmuted {
  display: none;
}
.sound-toggle.unmuted .icon-muted {
  display: none;
}
.sound-toggle.unmuted .icon-unmuted {
  display: block;
}

/* --- LANDING CONTENT --- */
.landing-content {
  position: relative;
  z-index: 10;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

/* Corner mark */
.corner-mark {
  position: fixed;
  top: 1.5rem;
  left: 2rem;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--color-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 0.3rem;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.6s ease 0.3s, transform 0.6s ease 0.3s;
}
.corner-mark.visible {
  opacity: 0.7;
  transform: translateY(0);
}

/* Center stage */
.center-stage {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

/* Title */
.title-group {
  overflow: hidden;
}
.landing-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  line-height: 1;
}
.title-line {
  display: block;
  font-family: 'Bebas Neue', sans-serif;
  font-weight: 400;
  font-size: clamp(4.5rem, 15vw, 12rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity 1.4s cubic-bezier(0.16, 1, 0.3, 1),
              transform 1.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.title-line.visible {
  opacity: 1;
  transform: translateY(0);
  text-shadow: 0 2px 40px rgba(0, 0, 0, 0.4);
}
#titleLine2 {
  transition-delay: 0.3s;
}
.landing-tagline {
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--color-white-dim);
  margin-top: 1rem;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  font-style: italic;
}
.landing-tagline.visible {
  opacity: 1;
  transform: translateY(0);
}
.tagline-credit {
  display: block;
  font-size: 0.65rem;
  font-style: normal;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.5;
  margin-top: 0.5rem;
}

/* Center divider */
.center-divider {
  width: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.25);
  transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.center-divider.visible {
  width: 40px;
}

/* CTA Button */
.cta-wrapper {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.cta-wrapper.visible {
  opacity: 1;
  transform: translateY(0);
}
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2.5rem;
  border: 1px solid var(--color-white-faint);
  border-radius: 100px;
  color: var(--color-white);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15), inset 0 0 0 0.5px rgba(255, 255, 255, 0.1);
  cursor: pointer;
  transition: background 0.4s ease, border-color 0.4s ease, transform 0.4s ease, gap 0.4s ease, box-shadow 0.4s ease;
}
.cta-button:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25), inset 0 0 0 0.5px rgba(255, 255, 255, 0.15);
  transform: scale(1.03);
  gap: 1.2rem;
}
.cta-arrow {
  display: flex;
  align-items: center;
}
.cta-arrow svg {
  width: 18px;
  height: 18px;
  transition: transform 0.4s ease;
}
.cta-button:hover .cta-arrow svg {
  transform: translateX(3px);
}

/* Bottom bar */
.bottom-bar {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-white-dim);
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.bottom-bar.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* --- PAGE TRANSITION --- */
.page-transition {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: #000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.page-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* --- RESPONSIVE --- */
@media (max-width: 600px) {
  .corner-mark {
    top: 1rem;
    left: 1.25rem;
  }
  .sound-toggle {
    top: 1rem;
    right: 1rem;
  }
  .cta-button {
    padding: 0.85rem 2rem;
    font-size: 0.8rem;
  }
  .bottom-bar {
    bottom: 1.5rem;
    font-size: 0.65rem;
  }
}