/* ========================================
   🌐 Global Vault Books Supreme Stylesheet
   ======================================== */

/* 🚨 Global Reset + Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  font-family: 'Orbitron', sans-serif;
  background: rgba(0, 0, 0, 0.7) url('assets/background.png') no-repeat center center fixed;
  background-size: cover;
  color: #fff;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

/* 🔄 Animated Logo */
.logo-spin-glow {
  width: 120px;
  animation: spinGlow 25s linear infinite;
  filter: drop-shadow(0 0 8px #ffd000) drop-shadow(0 0 16px #ff00f7);
  display: block;
  margin: 20px auto;
}

@keyframes spinGlow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 🧭 Navigation */
.main-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0 10px;
  z-index: 10;
}

.nav-buttons {
  display: flex;
  gap: 20px;
  margin-top: 15px;
}
/* 🍔 Supreme Hamburger Menu Toggle (Mobile Only) */
.hamburger-menu {
  display: none;
  position: fixed;
  top: 20px;
  right: 25px;
  font-size: 2rem;
  z-index: 9999;
  color: #FFD700;
  cursor: pointer;
  animation: pulseGlow 2s infinite alternate;
}

/* 🔽 Dropdown Nav Menu Styling */
.mobile-nav-dropdown {
  display: none;
  flex-direction: column;
  position: fixed;
  top: 75px;
  right: 20px;
  background: rgba(0, 0, 0, 0.95);
  border: 2px solid #FFD700;
  border-radius: 14px;
  z-index: 9998;
  padding: 1rem;
  box-shadow: 0 0 18px #ffd700, 0 0 30px #ff00f7;
  animation: dropdownFade 0.3s ease-in-out;
}

.mobile-nav-dropdown a {
  color: #fff;
  text-decoration: none;
  padding: 10px 20px;
  font-size: 1rem;
  font-weight: bold;
  border-bottom: 1px solid #ffd700;
  transition: background 0.3s ease;
}

.mobile-nav-dropdown a:last-child {
  border-bottom: none;
}

.mobile-nav-dropdown a:hover {
  background: #FFD700;
  color: #000;
  border-radius: 10px;
}

/* 🔒 Hide Dropdown on Desktop (force override) */
@media (min-width: 769px) {
  .mobile-nav-dropdown {
    display: none !important;
  }
}
/* 🌀 Animations */
@keyframes dropdownFade {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 🌟 Only Show on Mobile */
@media (max-width: 768px) {
  .hamburger-menu {
    display: block;
  }

  .nav-buttons {
    display: none;
  }
}

/* 💛 Glowing Gold Button */
.glow-btn {
  padding: 12px 24px;
  border: 2px solid #ffd000;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.3);
  color: #fff;
  text-decoration: none;
  font-size: 1rem;
  box-shadow: 0 0 15px #ffd000, 0 0 25px #ff00f7;
  transition: all 0.3s ease-in-out;
  animation: pulseGlowBtn 3s infinite ease-in-out;
}

.glow-btn:hover {
  background: #ffd000;
  color: #000;
  transform: scale(1.1);
  box-shadow: 0 0 30px #ffd000, 0 0 45px #ff00f7;
}

@keyframes pulseGlowBtn {
  0%   { box-shadow: 0 0 10px #ffd000, 0 0 20px #ff00f7; }
  50%  { box-shadow: 0 0 25px #ff00f7, 0 0 40px #ffd000; }
  100% { box-shadow: 0 0 10px #ffd000, 0 0 20px #ff00f7; }
}

/* 🦸 Hero Section */
.hero-section {
  text-align: center;
  padding: 60px 20px 40px;
  background: rgba(0, 0, 0, 0.5);
  border-top: 2px solid #00f0ff;
  border-bottom: 2px solid #ff00f7;
  box-shadow: 0 0 25px #00f0ff, 0 0 45px #ff00f7;
  margin: 20px auto;
  border-radius: 18px;
  max-width: 1100px;
  animation: pulseGlowHero 5s infinite ease-in-out;
}

.hero-title {
  font-size: 3rem;
  color: #ffd000;
  text-shadow: 0 0 18px #ffd000, 0 0 36px #ff00f7;
}

.hero-subtitle {
  font-size: 1.4rem;
  color: #fff;
  margin-top: 10px;
  text-shadow: 0 0 12px #00f0ff;
}

@keyframes pulseGlowHero {
  0%, 100% { box-shadow: 0 0 25px #00f0ff, 0 0 45px #ff00f7; }
  50%      { box-shadow: 0 0 40px #ff00f7, 0 0 70px #00f0ff; }
}

/* 💎 Glowing Box */
.glow-box {
  background: rgba(0, 0, 0, 0.6);
  border: 2px solid #00f0ff;
  padding: 30px;
  margin: 40px auto;
  max-width: 1000px;
  border-radius: 20px;
  box-shadow: 0 0 20px #00f0ff, 0 0 35px #ff00f7;
  text-align: center;
  animation: pulseGlowBox 4s infinite ease-in-out;
}

@keyframes pulseGlowBox {
  0%, 100% { box-shadow: 0 0 15px #00f0ff, 0 0 25px #ff00f7; }
  50%      { box-shadow: 0 0 30px #00f0ff, 0 0 50px #ff00f7; }
}

.centered-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* 📚 Book Display */
.book-gallery {
  flex-wrap: wrap;
  gap: 40px;
}

.book-card {
  text-align: center;
  padding: 20px;
}

.book-cover {
  width: 200px;
  border-radius: 12px;
  box-shadow: 0 0 12px #ffd000, 0 0 18px #ff00f7;
}

.book-title {
  margin-top: 15px;
  font-size: 1.5rem;
  color: #ffd000;
}

.book-author {
  font-size: 1rem;
  color: #ccc;
}

/* 🌌 Subtle Star Background Layer */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  background: url('assets/background.png') no-repeat center center fixed;
  background-size: cover;
  z-index: -1;
  opacity: 0.2;
}

/* 💌 Email Form */
.email-form input,
.email-form textarea {
  width: 100%;
  max-width: 400px;
  margin: 10px auto;
  padding: 14px;
  border-radius: 10px;
  border: none;
  outline: none;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
  box-shadow: 0 0 10px #ffd000;
  transition: 0.3s ease-in-out;
}

.email-form input:focus,
.email-form textarea:focus {
  box-shadow: 0 0 20px #ffd000, 0 0 30px #ff00f7;
}

/* 📩 Popup Message */
.popup-message {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.9);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.popup-box {
  background: #000;
  padding: 50px;
  border: 3px solid #ffd000;
  border-radius: 20px;
  box-shadow: 0 0 30px #ffd000, 0 0 40px #ff00f7;
  text-align: center;
  color: #fff;
}

/* === 🔐 SUPREME MEMORY GAME === */
.memory-game-section {
  text-align: center;
  padding: 50px 20px;
  margin: 40px auto;
  max-width: 750px;
  background: rgba(0, 0, 0, 0.7);
  box-shadow: 0 0 40px #00f0ff, 0 0 60px #ffd000;
  border-radius: 20px;
  animation: pulseHero 12s infinite ease-in-out;
}

.game-title {
  font-size: 3rem;
  text-shadow: 0 0 12px #ffd000, 0 0 35px #00f0ff;
  margin-bottom: 12px;
}

.game-subtitle {
  font-size: 1.4rem;
  color: #ddd;
  text-shadow: 0 0 8px #ff00f7;
  margin-bottom: 30px;
}

.restart-btn {
  background: linear-gradient(45deg, #ffd000, #ff00f7);
  border: none;
  padding: 14px 30px;
  color: black;
  font-weight: bold;
  font-size: 1.05rem;
  border-radius: 30px;
  margin: 20px 0;
  box-shadow: 0 0 20px #ffd000, 0 0 40px #ff00f7;
  cursor: pointer;
  transition: 0.3s ease-in-out;
}

.restart-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 0 35px #ff00f7, 0 0 50px #ffd000;
}

/* 💠 Memory Cards */
.memory-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  justify-items: center;
  max-width: 480px;
  margin: 0 auto;
}

.memory-card {
  width: 110px;
  height: 140px;
  perspective: 1000px;
  cursor: pointer;
}

.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s;
}

.memory-card.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-front,
.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  backface-visibility: hidden;
  box-shadow: 0 0 15px #ffd000, 0 0 35px #00f0ff;
}

.card-front {
  background: rgba(0, 0, 0, 0.5);
}

.card-front-img {
  width: 65px;
  height: 65px;
  animation: spinPulse 18s infinite linear;
}

.card-back {
  background: linear-gradient(145deg, #ff00f7, #ffd000);
  color: #fff;
  transform: rotateY(180deg);
  font-weight: bold;
  text-shadow: 0 0 5px #000;
}

/* 🏆 Winning Popup */
.win-popup {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.85);
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

.win-box {
  background: #111;
  padding: 45px;
  border: 3px solid #ffd000;
  border-radius: 24px;
  text-align: center;
  box-shadow: 0 0 40px #ffd000, 0 0 60px #ff00f7;
  color: #fff;
}

/* 🌠 Animations */
@keyframes spinPulse {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.1); }
  100% { transform: rotate(360deg) scale(1); }
}

@keyframes pulseHero {
  0%, 100% { box-shadow: 0 0 50px #00f0ff, 0 0 80px #ffd000; }
  50% { box-shadow: 0 0 70px #ff00f7, 0 0 110px #ffd000; }
}

/* 📱 Responsive */
@media (max-width: 768px) {
  .memory-game-section {
    max-width: 95%;
    padding: 30px 15px;
  }

  .game-title {
    font-size: 2.2rem;
  }

  .game-subtitle {
    font-size: 1.1rem;
  }

  .memory-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
  }

  .memory-card {
    width: 90px;
    height: 120px;
  }

  .card-front-img {
    width: 50px;
    height: 50px;
  }

  .restart-btn {
    padding: 10px 24px;
    font-size: 1rem;
  }

  .win-box {
    padding: 30px;
  }
}

/* ================================
   🦶 GLOBAL VAULT FOOTER AREA
   ================================ */
.site-footer {
  background-color: rgba(0, 0, 0, 0.88);
  padding: 30px 20px;
  color: #ffffff;
  text-align: center;
  border-top: 2px solid #00f0ff;
  box-shadow: 0 0 25px #00f0ff, 0 0 40px #ffd000;
  z-index: 5;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-links {
  margin-bottom: 15px;
}

.footer-links a {
  color: #ffd000;
  text-decoration: none;
  margin: 0 12px;
  font-weight: 600;
  text-shadow: 0 0 8px #ffd000;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.footer-links a:hover {
  color: #ff00f7;
  text-shadow: 0 0 14px #ff00f7;
}

/* 🔗 Social Icons Standard */
.social-icons {
  margin-top: 20px;
}

.social-icons a {
  font-size: 24px;
  color: #ffd000;
  margin: 0 10px;
  transition: transform 0.3s ease, color 0.3s ease;
}

.social-icons a:hover {
  color: #00f0ff;
  transform: scale(1.2);
}

/* ✨ Glowing Pulse Social Buttons */
.social-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  margin: 0 10px;
  border: 2px solid #ffd000;
  border-radius: 50%;
  font-size: 22px;
  color: #fff;
  text-decoration: none;
  background: rgba(0, 0, 0, 0.6);
  box-shadow: 0 0 15px #ffd000, 0 0 25px #ff00f7;
  transition: all 0.3s ease-in-out;
  animation: glowPulse 2s infinite ease-in-out;
}

.social-glow:hover {
  background: #ffd000;
  color: #000;
  transform: scale(1.15) rotate(2deg);
  box-shadow: 0 0 28px #ff00f7, 0 0 40px #ffd000;
}

/* 🌟 Glow Pulse Animation */
@keyframes glowPulse {
  0% { box-shadow: 0 0 10px #ffd000, 0 0 18px #ff00f7; }
  50% { box-shadow: 0 0 20px #ff00f7, 0 0 30px #ffd000; }
  100% { box-shadow: 0 0 10px #ffd000, 0 0 18px #ff00f7; }
}

/* 📄 Footer Credit Text */
.footer-credit {
  margin-top: 20px;
  font-size: 14px;
  color: #ccc;
  text-shadow: 0 0 6px #ffd000;
}

/* ============================
   📩 GLOWING CONTACT FORM STYLE
============================ */
.centered-section {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 60px 20px;
  position: relative;
  z-index: 2;
  text-align: center; /* Ensures text aligns center too */
}

#contactForm {
  width: 100%;
  max-width: 600px;
  background: rgba(0, 0, 0, 0.75);
  border: 2px solid #ffd000;
  border-radius: 18px;
  padding: 40px 30px;
  box-shadow: 0 0 20px #ffd000, 0 0 40px #ff00f7;
  animation: pulseBoxGlow 5s infinite ease-in-out;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ✨ Input Fields */
#contactForm input[type="text"],
#contactForm input[type="email"],
#contactForm textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.5);
  border: 2px solid #ffd000;
  color: #fff;
  padding: 15px;
  margin: 14px 0;
  border-radius: 12px;
  font-size: 1rem;
  box-shadow: 0 0 10px #ffd000;
  transition: all 0.3s ease;
}

/* 🔍 Focus Effects */
#contactForm input:focus,
#contactForm textarea:focus {
  border-color: #00f0ff;
  box-shadow: 0 0 18px #00f0ff, 0 0 25px #ffd000;
  outline: none;
  background: rgba(0, 0, 0, 0.9);
}

/* ✍️ Textarea */
#contactForm textarea {
  resize: vertical;
  min-height: 140px;
  max-width: 100%;
  width: 100%;
}

/* 🔘 Center Button */
#contactForm button {
  margin-top: 20px;
  align-self: center;
}

/* ✨ Supreme Glow Submit Button */
.glow-btn {
  display: inline-block;
  width: 100%;
  padding: 16px 20px;
  font-size: 1.1rem;
  font-weight: bold;
  color: #000;
  background: #ffd000;
  border: none;
  border-radius: 14px;
  box-shadow: 0 0 15px #ffd000, 0 0 25px #00f0ff;
  cursor: pointer;
  margin-top: 25px;
  transition: all 0.4s ease-in-out;
  animation: glowPulse 3s infinite ease-in-out;
}

.glow-btn:hover {
  background: #00f0ff;
  color: #000;
  box-shadow: 0 0 25px #00f0ff, 0 0 40px #ffd000;
}

/* 🔁 Glow Box Pulse Animation */
@keyframes pulseBoxGlow {
  0% { box-shadow: 0 0 12px #ffd000, 0 0 22px #ff00f7; }
  50% { box-shadow: 0 0 24px #ff00f7, 0 0 35px #ffd000; }
  100% { box-shadow: 0 0 12px #ffd000, 0 0 22px #ff00f7; }
}

/* ============================
   📖 ABOUT – Supreme Bio Section
============================ */

.centered-section {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 80px 20px;
  position: relative;
  z-index: 2;
}

.glow-box {
  max-width: 1000px;
  background: rgba(0, 0, 0, 0.75);
  border: 2px solid #ffd000;
  border-radius: 20px;
  padding: 50px 35px;
  text-align: left;
  color: #ffffff;
  font-size: 1.1rem;
  line-height: 1.75;
  box-shadow: 0 0 25px #ffd000, 0 0 40px #00f0ff;
  animation: pulseBoxGlow 5s infinite ease-in-out;
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.2);
}

/* 🔠 Strong Elements */
.glow-box strong {
  color: #ffd000;
  font-weight: 700;
  text-shadow: 0 0 8px #ffd000;
}

/* 🔠 Emphasis Elements */
.glow-box em {
  color: #00f0ff;
  font-style: italic;
  text-shadow: 0 0 10px #00f0ff;
}

/* ✨ Paragraph Glow Fade-in */
.glow-box p {
  margin-bottom: 24px;
  animation: fadeInParagraph 1.2s ease-in-out;
}

/* 🔄 Paragraph Animation */
@keyframes fadeInParagraph {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 💫 Neon Box Glow Animation */
@keyframes pulseBoxGlow {
  0% {
    box-shadow: 0 0 12px #ffd000, 0 0 22px #00f0ff;
  }
  50% {
    box-shadow: 0 0 28px #00f0ff, 0 0 45px #ffd000;
  }
  100% {
    box-shadow: 0 0 12px #ffd000, 0 0 22px #00f0ff;
  }
}
/* 💌 Popup Message Styling */
.popup-message {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) scale(0.8);
  background: #00f0ff;
  color: #000;
  padding: 16px 28px;
  font-size: 1.1rem;
  font-weight: bold;
  border-radius: 16px;
  box-shadow: 0 0 20px #ff00f7, 0 0 35px #ffd000;
  opacity: 0;
  transition: all 0.4s ease;
  z-index: 9999;
  pointer-events: none;
}
/* 📩 Popup Styling */
.popup-message {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.4s ease-in-out;
}

.popup-box {
  background: #111;
  padding: 40px 30px;
  border-radius: 18px;
  box-shadow: 0 0 20px #00f0ff, 0 0 35px #ff00f7;
  text-align: center;
  color: #fff;
  max-width: 500px;
  animation: pulseBoxGlow 6s infinite ease-in-out;
}

.popup-box h3 {
  font-size: 1.8rem;
  color: #ffd000;
  margin-bottom: 10px;
}

.popup-box p {
  font-size: 1.1rem;
  margin-bottom: 20px;
}
#goldenTrailContainer {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 99999;
}

.golden-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  background: radial-gradient(circle, #ffd000 0%, #ffb700 60%, transparent 100%);
  border-radius: 50%;
  opacity: 0.9;
  animation: fadeOut 1s linear forwards;
  pointer-events: none;
  box-shadow: 0 0 8px #ffd000, 0 0 12px #ffb700;
}

@keyframes fadeOut {
  to {
    opacity: 0;
    transform: scale(0.3);
  }
}
.yacht-loop {
  position: fixed;
  top: 5px;
  left: 0;
  width: 100vw;
  height: 259px;
  z-index: 9999;
  pointer-events: none;
  overflow: hidden;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 85%, rgba(0,0,0,0));
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 85%, rgba(0,0,0,0));
}


/* 🛥️ Animated Yacht with Glowing, Bobbing, and Pulsing Effects */
.yacht-img {
  position: absolute;
  height: 250px;
  animation: yachtCruise 40s linear infinite, yachtBob 3s ease-in-out infinite, yachtPulse 2.5s ease-in-out infinite;
  filter: 
    drop-shadow(0 0 12px #ffd000)
    drop-shadow(0 0 20px #ffd000)
    drop-shadow(0 0 30px #ff00f7)
    drop-shadow(0 0 45px #00f0ff)
    brightness(1.15)
    contrast(1.2);
  opacity: 0.97;
  transform: translateX(-150%);
}

/* ✨ Yacht Movement Keyframes (Left to Right Only) */
@keyframes yachtCruise {
  0% {
    left: -300px;
    opacity: 0;
    transform: translateX(0) scale(1);
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
    transform: translateX(100vw) scale(1);
  }
  100% {
    left: 100vw;
    opacity: 0;
  }
}

/* 🌊 Yacht Bobbing Up and Down for Realism */
@keyframes yachtBob {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(8px);
  }
}

/* 💥 Glowing Pulse Animation */
@keyframes yachtPulse {
  0%, 100% {
    filter: drop-shadow(0 0 10px #ffd000) drop-shadow(0 0 20px #ff00f7) drop-shadow(0 0 30px #00f0ff);
  }
  50% {
    filter: drop-shadow(0 0 20px #ff00f7) drop-shadow(0 0 35px #ffd000) drop-shadow(0 0 40px #00f0ff);
  }
}
/* 📽️ GNB Video Section */
.gnb-video-section {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 60px 20px;
  background: transparent;
  z-index: 5;
}

/* ✨ Glowing Video Box */
.gnb-video {
  width: 100%;
  max-width: 660px;
  border-radius: 18px;
  box-shadow:
    0 0 15px #ffd000,
    0 0 25px #ff00f7,
    0 0 40px #00f0ff;
  transition: transform 0.4s ease-in-out, box-shadow 0.4s ease-in-out;
  background-color: #000; /* fallback if poster doesn't load */
}

/* 🎬 Hover Effect */
.gnb-video:hover {
  transform: scale(1.01);
  box-shadow:
    0 0 25px #ffd000,
    0 0 35px #ff00f7,
    0 0 50px #00f0ff;
}
/* ✨ Light Golden Sparkles Overlay */
.golden-sparkles {
  pointer-events: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0; /* stays behind content */
  background-image: 
    radial-gradient(#ffd000 0.5px, transparent 0.5px),
    radial-gradient(#ffd000 0.5px, transparent 0.5px);
  background-size: 80px 80px; /* 🟡 Increased spacing = fewer sparkles */
  background-position: 0 0, 40px 40px;
  animation: sparkleScroll 20s linear infinite, sparklePulse 5s ease-in-out infinite;
  opacity: 0.15; /* ✨ Very subtle shimmer */
}


/* ✨ Sparkling Scroll Animation */
@keyframes sparkleScroll {
  0% {
    background-position: 0 0, 20px 20px;
  }
  100% {
    background-position: 100px 100px, 120px 120px;
  }
}

/* ✨ Subtle Glow/Pulse Effect */
@keyframes sparklePulse {
  0%, 100% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.6;
  }
}