:root {
  --primary: #ff4d6d;
  --primary-light: #ff758f;
  --primary-dark: #c9184a;
  --glass: rgba(255, 255, 255, 0.15);
  --glass-heavy: rgba(255, 255, 255, 0.85);
  --font-title: 'Playfair Display', serif;
  --font-body: 'Outfit', sans-serif;
  --font-script: 'Great Vibes', cursive;
}

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

body {
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
  background: linear-gradient(135deg, #fff0f3 0%, #ffcad4 100%);
}

.celebration-container {
  padding: 20px;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 1;
}

/* Balloons */
.balloons-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.balloon {
  position: absolute;
  bottom: -150px;
  border-radius: 50% 50% 50% 50% / 40% 40% 60% 60%;
  box-shadow: inset -5px -5px 10px rgba(0, 0, 0, 0.1);
  opacity: 0.7;
}

.balloon::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  width: 2px;
  height: 100px;
  background: rgba(255, 255, 255, 0.5);
  transform: translateX(-50%);
}

/* Glass Card */
.glass-card {
  background: var(--glass-heavy);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 30px;
  width: 100%;
  max-width: 1000px;
  display: flex;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(255, 77, 109, 0.25);
}

.photo-section {
  flex: 1;
  background: #000;
  position: relative;
  min-height: 500px;
}

.image-reveal {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.main-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.image-shimmer {
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(to right,
      rgba(255, 255, 255, 0) 0%,
      rgba(255, 255, 255, 0.3) 50%,
      rgba(255, 255, 255, 0) 100%);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  to {
    left: 150%;
  }
}

.message-section {
  flex: 1;
  padding: 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.celebrate-title {
  font-family: var(--font-title);
  font-size: 3rem;
  color: var(--primary-dark);
  line-height: 1;
  margin-bottom: 30px;
}

.celebrate-title span {
  font-family: var(--font-script);
  font-size: 4.5rem;
  color: var(--primary);
  display: block;
  margin-top: 10px;
}

.message-content {
  font-size: 1.2rem;
  line-height: 1.6;
  color: #4a4a4a;
  margin-bottom: 40px;
}

.message-content p {
  margin-bottom: 20px;
}

.action-section {
  margin-bottom: 40px;
}

.add-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 15px 30px;
  border-radius: 50px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 20px rgba(255, 77, 109, 0.3);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.add-btn:hover {
  transform: translateY(-5px) scale(1.05);
  background: var(--primary-dark);
  box-shadow: 0 15px 30px rgba(255, 77, 109, 0.4);
}

.add-btn .icon {
  font-size: 1.4rem;
  transition: transform 0.4s ease;
}

.add-btn:hover .icon {
  transform: rotate(20deg) scale(1.2);
}

.footer-info {
  margin-top: auto;
}

.credit {
  font-size: 0.9rem;
  color: #888;
  margin-bottom: 20px;
}

.author {
  color: var(--primary-dark);
  font-weight: 600;
}

.heart-pulse {
  color: var(--primary);
  display: inline-block;
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  to {
    transform: scale(1.3);
  }
}

.back-home {
  display: inline-block;
  color: var(--primary-dark);
  text-decoration: none;
  font-weight: 600;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--primary-light);
  transition: all 0.3s ease;
}

.back-home:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Floating Music Button */
.music-controls {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 100;
}

.fab-music {
  width: 60px;
  height: 60px;
  background: var(--primary);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 24px;
  cursor: pointer;
  box-shadow: 0 10px 20px rgba(255, 77, 109, 0.4);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.fab-music:hover {
  transform: scale(1.1) rotate(15deg);
}

.fab-music.playing {
  animation: musicPulse 1.5s infinite;
}

@keyframes musicPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 77, 109, 0.7);
  }

  70% {
    box-shadow: 0 0 0 20px rgba(255, 77, 109, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(255, 77, 109, 0);
  }
}

/* Responsive */
@media (max-width: 900px) {
  .glass-card {
    flex-direction: column;
    max-width: 500px;
    margin: 20px 0;
  }

  .photo-section {
    min-height: 350px;
  }

  .message-section {
    padding: 40px 30px;
  }

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

  .celebrate-title span {
    font-size: 3.2rem;
  }
}

@media (max-width: 480px) {
  .celebration-container {
    padding: 10px;
  }

  .glass-card {
    border-radius: 20px;
  }

  .photo-section {
    min-height: 300px;
  }

  .message-section {
    padding: 30px 20px;
  }

  .celebrate-title {
    font-size: 1.8rem;
  }

  .celebrate-title span {
    font-size: 2.8rem;
  }

  .message-content {
    font-size: 1rem;
  }

  .fab-music {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }
}

/* High Resolution Screens (4K, 8K) */
@media (min-width: 2500px) {
  html {
    font-size: 24px;
  }

  .glass-card {
    max-width: 1600px;
  }

  .photo-section {
    min-height: 700px;
  }
}

@media (min-width: 3800px) {
  html {
    font-size: 32px;
  }

  .glass-card {
    max-width: 2200px;
  }

  .photo-section {
    min-height: 900px;
  }
}