html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: 'Space Grotesk', 'Fira Sans', Arial, sans-serif;
  background: transparent;
  color: #fff;
  overflow: hidden;
  letter-spacing: 0.02em;
  line-height: 1.65;
  transition: background-color 0.4s, color 0.4s;
}

/* Background layers */
#bg-black {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: #000;
  z-index: -3;
}
#tsparticles {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  pointer-events: none;
  background: transparent;
  z-index: -2;
}

/* Main content container */
.center-content {
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1;
  max-width: 720px;
  width: 95vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 2rem;
  box-sizing: border-box;
}
.center-content.visible {
  opacity: 1;
}

/* Avatar */
.avatar-logo {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fff 45%, #ccc 100%);
  object-fit: cover;
  margin: 0 auto 18px auto;
  box-shadow: 0 0 8px #178aff, 0 0 18px #235bb6;
  border: 2px solid #178aff;
  display: block;
  animation: neon-pulse 3s ease-in-out infinite;
}
@keyframes neon-pulse {
  0%, 100% { box-shadow: 0 0 8px #178aff, 0 0 18px #235bb6; }
  50%      { box-shadow: 0 0 16px #178aff, 0 0 28px #235bb6; }
}

/* Main title and animated text */
.main-title {
  color: #178aff;
  font-size: 3.5em;
  font-weight: 700;
  margin-bottom: 0.3em;
  text-shadow: 0 0 6px #235bb6, 0 0 2px #178aff;
  font-family: 'Fira Sans', Arial, sans-serif;
}

#animated-title-wrap {
  display: inline-block;
  position: relative;
  min-height: 1.3em;
}

#animated-title, #animated-title-placeholder {
  font-family: 'Fira Sans', Arial, sans-serif;
  font-weight: 700;
  font-size: 1.2em;
  letter-spacing: 0.04em;
  line-height: 1.2;
  display: inline-block;
  white-space: nowrap;
}

#animated-title {
  position: absolute;
  left: 0;
  top: 0;
  border-right: 2px solid #178aff;
  animation: blink 1.2s step-end infinite;
  transition: opacity 0.25s ease;
}

#animated-title.fade-out {
  opacity: 0;
}

#animated-title-placeholder {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

/* Cursor blink animation */
@keyframes blink {
  0%, 100% { border-color: #178aff; }
  50% { border-color: transparent; }
}

/* Subtitle */
.subtitle {
  font-size: 1.15em;
  margin-bottom: 1.9em;
  color: #aaa;
}

/* Social icons and tooltip */
.social {
  margin-top: 1.8em;
  z-index: 1;
}
.social-link {
  display: inline-block;
  margin: 0 14px;
  color: #fff;
  font-size: 32px;
  position: relative;
  cursor: pointer;
  transition: color 0.3s ease, filter 0.3s ease;
}
.social-link:hover,
.social-link:focus {
  color: #178aff;
  filter: drop-shadow(0 0 10px #178aff);
  outline: none;
}
.tooltip-text {
  visibility: hidden;
  background: rgba(23, 138, 255, 0.9);
  color: #000;
  text-align: center;
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 0.65em;
  font-weight: 500;
  position: absolute;
  bottom: 130%;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  box-shadow: 0 0 8px #235bb6;
  z-index: 500;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.social-link:hover .tooltip-text,
.social-link:focus .tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* Contact button */
.contact-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1;
  font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
}
.contact-float button {
  background: rgba(0,0,0,0.85);
  color: #178aff;
  padding: 12px 16px;
  border-radius: 25px;
  border: 1px solid rgba(23,138,255,0.5);
  font-size: 0.9em;
  font-weight: 500;
  box-shadow: 0 0 10px rgba(35, 91, 182, 0.5);
  transition: all 0.3s ease;
  white-space: nowrap;
  cursor: pointer;
  text-shadow: 0 0 3px #235bb6;
}
.contact-float button:hover {
  box-shadow: 0 0 30px #178aff;
  background: rgba(23, 138, 255, 0.15);
  color: #235bb6;
  transform: translateY(-2px);
}

/* Dev note footer */
.dev-note-footer {
  position: fixed;
  bottom: 70px;
  right: 20px;
  font-weight: 600;
  font-family: 'Space Grotesk', Arial, sans-serif;
  font-size: 0.9em;
  color: #178aff;
  opacity: 0.5;
  text-shadow: 0 0 3px #235bb6;
  user-select: none;
  pointer-events: none;
  z-index: 1;
  white-space: nowrap;
  transition: opacity 2s;
}
.dev-note-footer:hover { opacity: 0.8; }

/* Smooth parallax transitions */
#bg-black, #tsparticles {
  transition: transform 0.1s ease-out;
  will-change: transform;
}

/* Responsive */
@media (max-width: 800px) {
  .main-title { font-size: 2em; }
  .avatar-logo { width: 80px; height: 80px; }
  .subtitle { font-size: 1em; }
  .social-link { font-size: 28px; }
  .contact-float button { padding: 10px 12px; font-size: 0.85em; border-radius: 22px;}
}
@media (max-width: 600px) {
  .main-title { font-size: 1.2em; }
  .avatar-logo { width: 56px; height: 56px; }
  .subtitle { font-size: 0.95em; }
  .social-link { font-size: 22px; }
  .dev-note-footer { right: 10px; font-size: 0.8em; bottom: 90px; }
  .contact-float { bottom: 10px; right: 10px; }
  .contact-float button { padding: 8px 10px; font-size: 0.8em; border-radius: 20px;}
}
@media (max-width: 400px) {
  .main-title { font-size: 1em; }
  .avatar-logo { width: 40px; height: 40px; }
  .subtitle { font-size: 0.85em; }
  .social-link { font-size: 16px; }
  .dev-note-footer { font-size: 0.7em; bottom: 100px; right: 5px; }
  .contact-float button { padding: 7px 8px; font-size: 0.7em; border-radius: 16px; max-width: 90vw;}
}