/* ==========================================================================
   Romantic Birthday Celebration - Bright & Colorful Luxury Theme
   Crafted with radiant pastel gradients, bright glassmorphism & joyful aesthetics
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Dancing+Script:wght@600;700&family=Outfit:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,600;0,700;0,800;1,400&display=swap');

:root {
  --primary-rose: #f43f5e;
  --primary-blush: #fb7185;
  --primary-coral: #fb923c;
  --primary-purple: #c084fc;
  --primary-gold: #f59e0b;
  --text-main: #1f2937;
  --text-muted: #64748b;
  --text-rose: #be123c;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Outfit', sans-serif;
  background: linear-gradient(135deg, #fff1f2 0%, #fef3c7 20%, #fdf2f8 45%, #f3e8ff 70%, #e0f2fe 100%);
  background-attachment: fixed;
  min-height: 100vh;
  color: var(--text-main);
  overflow-x: hidden;
  position: relative;
}

.font-romantic {
  font-family: 'Dancing Script', cursive;
}

.font-serif-title {
  font-family: 'Playfair Display', serif;
}

/* Ambient Colorful Lighting Orbs */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}

.glow-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(251, 113, 133, 0.4) 0%, rgba(253, 164, 175, 0.15) 50%, transparent 70%);
  top: -60px;
  left: -60px;
  animation: floatAmbient 12s ease-in-out infinite alternate;
}

.glow-2 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(192, 132, 252, 0.35) 0%, rgba(216, 180, 254, 0.12) 50%, transparent 70%);
  bottom: 5%;
  right: -80px;
  animation: floatAmbient 16s ease-in-out infinite alternate-reverse;
}

.glow-3 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(252, 211, 77, 0.4) 0%, rgba(254, 240, 138, 0.15) 50%, transparent 70%);
  top: 40%;
  left: 30%;
  animation: pulseGlow 8s ease-in-out infinite alternate;
}

@keyframes floatAmbient {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(50px, 60px) scale(1.15); }
}

@keyframes pulseGlow {
  0% { opacity: 0.4; transform: scale(0.9); }
  100% { opacity: 0.8; transform: scale(1.2); }
}

/* Floating Hearts Background Canvas */
#hearts-canvas, #confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

#confetti-canvas {
  z-index: 100;
}

/* Bright Glassmorphism Cards */
.glass-panel {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 2px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 20px 45px -10px rgba(244, 63, 94, 0.16), 0 10px 25px -5px rgba(168, 85, 247, 0.12), inset 0 2px 4px rgba(255, 255, 255, 0.9);
}

.glass-panel-light {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1.5px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 8px 20px rgba(244, 63, 94, 0.08);
}

/* Keypad PIN Shake Animation on Error */
@keyframes shakeKeypad {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-12px); }
  40%, 80% { transform: translateX(12px); }
}

.shake {
  animation: shakeKeypad 0.5s ease-in-out;
}

/* PIN Indicator dots */
.pin-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid #fda4af;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 2px 6px rgba(244, 63, 94, 0.15);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.pin-dot.filled {
  background: linear-gradient(135deg, #f43f5e, #fb7185);
  border-color: #f43f5e;
  box-shadow: 0 0 14px rgba(244, 63, 94, 0.7);
  transform: scale(1.2);
}

/* Level 1: Catch The Heart Bubbles */
.heart-bubble-container {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: visible;
  border-radius: 1.5rem;
  background: rgba(255, 255, 255, 0.45);
  border: 1.5px solid rgba(255, 255, 255, 0.8);
  box-shadow: inset 0 2px 8px rgba(244, 63, 94, 0.06);
}

.heart-bubble {
  position: absolute;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  background: radial-gradient(circle at 30% 30%, #ffffff 0%, #fed7aa 25%, #f472b6 65%, #e11d48 100%);
  border: 2px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 10px 24px rgba(244, 63, 94, 0.35), inset 0 2px 8px rgba(255, 255, 255, 0.9);
  transition: transform 0.2s ease, opacity 0.3s ease;
  animation: floatBubble 5s ease-in-out infinite alternate;
}

.heart-bubble:hover {
  transform: scale(1.15);
  box-shadow: 0 0 32px rgba(244, 63, 94, 0.65), inset 0 2px 8px #fff;
}

@keyframes floatBubble {
  0% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-18px) rotate(5deg); }
  100% { transform: translateY(8px) rotate(-4deg); }
}

.bubble-quote-pill {
  animation: quoteFloatUp 1.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  pointer-events: none;
  max-width: calc(100% - 24px);
  white-space: normal;
  text-align: center;
  z-index: 50;
  box-shadow: 0 10px 25px rgba(244, 63, 94, 0.35), 0 0 20px rgba(251, 146, 60, 0.3);
}

@keyframes quoteFloatUp {
  0% { opacity: 0; transform: translate(-50%, 15px) scale(0.85); }
  25% { opacity: 1; transform: translate(-50%, -8px) scale(1.04); }
  80% { opacity: 1; transform: translate(-50%, -24px) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -42px) scale(0.92); }
}

/* Level 3: 3D Memory Card Game */
.memory-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  perspective: 1000px;
}

@media (max-width: 480px) {
  .memory-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }
}

.card-flipper {
  aspect-ratio: 1;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

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

.card-flipper.matched {
  transform: rotateY(180deg) scale(0.96);
  pointer-events: none;
}

.card-front, .card-back {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-front {
  background: linear-gradient(135deg, #ffffff 0%, #fdf2f8 50%, #fce7f3 100%);
  border: 2px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 8px 18px rgba(244, 63, 94, 0.12), inset 0 2px 4px rgba(255, 255, 255, 0.9);
}

.card-back {
  background: linear-gradient(135deg, #fb7185 0%, #f43f5e 50%, #e11d48 100%);
  border: 2px solid rgba(255, 255, 255, 0.6);
  transform: rotateY(180deg);
  box-shadow: 0 10px 25px rgba(244, 63, 94, 0.35);
}

.card-flipper.matched .card-back {
  background: linear-gradient(135deg, #34d399, #10b981);
  border-color: rgba(255, 255, 255, 0.8);
  box-shadow: 0 0 22px rgba(16, 185, 129, 0.5);
}

/* Polaroid Gallery Styling */
.polaroid-card {
  background: #ffffff;
  color: #1f2937;
  padding: 14px 14px 22px 14px;
  border-radius: 8px;
  box-shadow: 0 16px 36px rgba(244, 63, 94, 0.15), 0 6px 14px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  position: relative;
  border: 1px solid rgba(255, 241, 242, 0.8);
}

.polaroid-card:hover {
  transform: scale(1.05) rotate(0deg) !important;
  box-shadow: 0 24px 50px rgba(244, 63, 94, 0.35);
  z-index: 20;
}

.washi-tape {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 86px;
  height: 24px;
  background: linear-gradient(135deg, rgba(252, 211, 77, 0.75), rgba(251, 146, 60, 0.7));
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  border-left: 2px dashed rgba(0,0,0,0.15);
  border-right: 2px dashed rgba(0,0,0,0.15);
  backdrop-filter: blur(2px);
  pointer-events: none;
}

/* Love Letter & Envelope */
.envelope-wrapper {
  perspective: 1000px;
}

.envelope {
  position: relative;
  width: 100%;
  max-width: 480px;
  height: 260px;
  margin: 0 auto;
  background: linear-gradient(145deg, #f43f5e 0%, #e11d48 50%, #be123c 100%);
  border-radius: 16px;
  box-shadow: 0 20px 45px rgba(244, 63, 94, 0.35);
  cursor: pointer;
  overflow: visible;
  transition: all 0.5s ease;
}

.envelope-flap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  border-left: 240px solid transparent;
  border-right: 240px solid transparent;
  border-top: 140px solid #fb7185;
  transform-origin: top;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 10;
}

@media (max-width: 520px) {
  .envelope-flap {
    border-left-width: 170px;
    border-right-width: 170px;
    border-top-width: 100px;
  }
}

.envelope.open .envelope-flap {
  transform: rotateX(180deg);
  z-index: 1;
}

.wax-seal {
  position: absolute;
  top: 100px;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  background: radial-gradient(circle, #fde047 0%, #f59e0b 50%, #d97706 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(217, 119, 6, 0.45), inset 0 2px 4px rgba(255,255,255,0.7);
  z-index: 12;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.envelope.open .wax-seal {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.5);
  pointer-events: none;
}

.letter-sheet {
  background: #ffffff;
  color: #374151;
  border-radius: 20px;
  box-shadow: 0 16px 45px rgba(244, 63, 94, 0.18);
  border: 2px solid #fce7f3;
  position: relative;
  background-image: radial-gradient(#fbcfe8 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Typewriter Cursor */
.typewriter-cursor {
  display: inline-block;
  width: 3px;
  height: 1.1em;
  background-color: #f43f5e;
  vertical-align: middle;
  margin-left: 2px;
  animation: blinkCursor 0.75s step-end infinite;
}

@keyframes blinkCursor {
  from, to { opacity: 1; }
  50% { opacity: 0; }
}

/* Surprise Gift Box Animation */
.gift-box-btn {
  position: relative;
  cursor: pointer;
  transition: transform 0.3s ease, filter 0.3s ease;
  animation: bounceGift 2s infinite ease-in-out;
}

.gift-box-btn:hover {
  transform: scale(1.15);
  filter: drop-shadow(0 0 25px rgba(251, 146, 60, 0.8));
}

@keyframes bounceGift {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-12px) scale(1.06); }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: #fff1f2;
}
::-webkit-scrollbar-thumb {
  background: #f472b6;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #f43f5e;
}