.valentine-theme{--valentine-primary: #FF1744;--valentine-secondary: #FF4081;--valentine-accent: #F50057;--valentine-light: #FFE0E9;--valentine-dark: #C51162;--valentine-gold: #FFD700}.flip-container{perspective:1000px;transform-style:preserve-3d}.flip-item{backface-visibility:hidden;transform-style:preserve-3d}Theme Styles */ .valentine-theme{--valentine-primary: #ff1744;--valentine-secondary: #ff4081;--valentine-accent: #f50057;--valentine-light: #ffe0e9;--valentine-dark: #c51162;--valentine-gold: #ffd700}.valentine-theme body{background:linear-gradient(135deg,#ffe0e9,#fff0f5,#ffe0e9)}.valentine-gradient-primary{background:linear-gradient(135deg,#ff1744,#ff4081,#f50057)}.valentine-gradient-secondary{background:linear-gradient(135deg,#f50057,#ff4081,#ff1744)}.valentine-gradient-soft{background:linear-gradient(135deg,#ffe0e9,#ffb3d9,#ff80ab)}.heart-shape{position:relative;width:100px;height:90px}.heart-shape:before,.heart-shape:after{content:"";position:absolute;top:0;width:52px;height:80px;border-radius:50px 50px 0 0;background:var(--valentine-primary, #ff1744)}.heart-shape:before{left:50px;transform:rotate(-45deg);transform-origin:0 100%}.heart-shape:after{left:0;transform:rotate(45deg);transform-origin:100% 100%}@keyframes heartbeat{0%,to{transform:scale(1)}10%,30%{transform:scale(1.1)}20%,40%{transform:scale(1.15)}}.heartbeat-animation{animation:heartbeat 1.5s infinite}@keyframes float{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-20px) rotate(10deg)}}.float-animation{animation:float 3s ease-in-out infinite}@keyframes shimmer{0%{background-position:-1000px 0}to{background-position:1000px 0}}.shimmer-effect{background:linear-gradient(90deg,#fff0,#ffffff4d,#fff0);background-size:1000px 100%;animation:shimmer 2s infinite}.glow-heart{filter:drop-shadow(0 0 10px rgba(255,23,68,.8)) drop-shadow(0 0 20px rgba(255,64,129,.6)) drop-shadow(0 0 30px rgba(245,0,87,.4))}@keyframes petal-fall{0%{transform:translateY(-100%) rotate(0);opacity:0}10%{opacity:1}90%{opacity:1}to{transform:translateY(100vh) rotate(360deg);opacity:0}}.petal-fall{animation:petal-fall 10s linear infinite}@keyframes sparkle{0%,to{opacity:0;transform:scale(0)}50%{opacity:1;transform:scale(1)}}.sparkle-animation{animation:sparkle 1.5s ease-in-out infinite}.valentine-button{background:linear-gradient(135deg,#ff1744,#f50057);color:#fff;border:none;padding:12px 32px;border-radius:50px;font-weight:600;cursor:pointer;position:relative;overflow:hidden;transition:all .3s ease}.valentine-button:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#ffffff4d;transform:translate(-50%,-50%);transition:width .6s,height .6s}.valentine-button:hover:before{width:300px;height:300px}.valentine-button:hover{transform:translateY(-2px);box-shadow:0 10px 30px #ff174480}@keyframes heart-pulse{0%{transform:scale(1)}25%{transform:scale(1.1)}50%{transform:scale(1)}75%{transform:scale(1.1)}to{transform:scale(1)}}.heart-pulse{animation:heart-pulse 1s infinite}.confetti-heart{position:absolute;font-size:20px;-webkit-user-select:none;-moz-user-select:none;user-select:none;pointer-events:none;animation:confetti-fall 3s linear forwards}@keyframes confetti-fall{to{transform:translateY(100vh) rotate(360deg);opacity:0}}.valentine-card{position:relative;transition:all .3s ease;border:2px solid transparent}.valentine-card:hover{border-color:var(--valentine-primary, #ff1744);box-shadow:0 10px 40px #ff17444d;transform:translateY(-5px)}.valentine-gradient-text{background:linear-gradient(135deg,#ff1744,#ff4081,#f50057);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}@keyframes love-wave{0%,to{clip-path:polygon(0% 45%,15% 44%,30% 50%,45% 55%,60% 50%,75% 44%,90% 45%,100% 50%,100% 100%,0% 100%)}50%{clip-path:polygon(0% 50%,15% 55%,30% 45%,45% 44%,60% 45%,75% 55%,90% 50%,100% 45%,100% 100%,0% 100%)}}.love-wave{animation:love-wave 3s ease-in-out infinite}.romantic-glow{box-shadow:0 0 20px #ff174480,0 0 40px #ff40814d,0 0 60px #f5005733}.cupid-arrow{position:relative}.cupid-arrow:after{content:"🏹";position:absolute;font-size:24px;animation:arrow-fly 5s linear infinite}@keyframes arrow-fly{0%{left:-50px;top:50%;opacity:0}10%,90%{opacity:1}to{left:calc(100% + 50px);top:50%;opacity:0}}body.holi-theme{--holi-primary: #a78bfa;--holi-secondary: #6ee7b7;--holi-accent: #fcd34d;--holi-light: #fff8ed;--holi-dark: #1f2937;--holi-gold: #fde047;background:linear-gradient(135deg,#fff5f7,#fef3e2 12%,#fce8f3,#e0f2fe 38%,#f0fdf4,#fef9c3 62%,#fce8f3,#e0e7ff 88%,#fff5f7);background-size:350% 350%;animation:holi-gradient-shift 16s ease-in-out infinite;min-height:100vh;position:relative;overflow-x:hidden}body.holi-theme:before{content:"";position:fixed;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 20% 30%,rgba(255,107,157,.08) 0%,transparent 45%),radial-gradient(circle at 80% 70%,rgba(167,139,250,.08) 0%,transparent 45%),radial-gradient(circle at 40% 80%,rgba(110,231,183,.07) 0%,transparent 45%),radial-gradient(circle at 70% 20%,rgba(252,211,77,.07) 0%,transparent 45%),radial-gradient(circle at 15% 60%,rgba(251,207,232,.06) 0%,transparent 45%),radial-gradient(circle at 90% 40%,rgba(103,232,249,.06) 0%,transparent 45%);animation:holi-blob-float 28s ease-in-out infinite;filter:blur(140px);opacity:.5;pointer-events:none;z-index:0}body.holi-theme:after{content:"";position:fixed;top:-50%;right:-50%;width:200%;height:200%;background:radial-gradient(circle at 60% 40%,rgba(251,146,60,.07) 0%,transparent 45%),radial-gradient(circle at 30% 70%,rgba(74,222,128,.07) 0%,transparent 45%),radial-gradient(circle at 85% 85%,rgba(196,132,252,.06) 0%,transparent 45%),radial-gradient(circle at 45% 15%,rgba(248,113,113,.06) 0%,transparent 45%),radial-gradient(circle at 25% 45%,rgba(253,224,71,.05) 0%,transparent 45%);animation:holi-blob-float 34s ease-in-out infinite reverse;filter:blur(140px);opacity:.45;pointer-events:none;z-index:0}body.holi-theme>*{position:relative;z-index:1}.holi-gradient-primary{background:linear-gradient(135deg,#a78bfa,#6ee7b7,#fcd34d)}.holi-gradient-secondary{background:linear-gradient(135deg,#fcd34d,#6ee7b7,#a78bfa)}.holi-glow{filter:drop-shadow(0 0 10px rgba(167,139,250,.35)) drop-shadow(0 0 20px rgba(110,231,183,.25)) drop-shadow(0 0 30px rgba(252,211,77,.2))}.holi-splash{background:radial-gradient(circle at 20% 20%,#fcd34d 0%,transparent 60%),radial-gradient(circle at 80% 10%,#fbcfe8 0%,transparent 65%),radial-gradient(circle at 30% 70%,#6ee7b7 0%,transparent 60%),radial-gradient(circle at 75% 75%,#a78bfa 0%,transparent 60%);animation:holi-splash-shift 18s ease-in-out infinite}@keyframes holi-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes holi-gradient-shift{0%,to{background-position:0% 50%}25%{background-position:50% 25%}50%{background-position:100% 50%}75%{background-position:50% 75%}}@keyframes holi-blob-float{0%,to{transform:translate(0) scale(1) rotate(0)}20%{transform:translate(50px,-40px) scale(1.2) rotate(8deg)}40%{transform:translate(-35px,45px) scale(.85) rotate(-6deg)}60%{transform:translate(25px,-30px) scale(1.15) rotate(5deg)}80%{transform:translate(-40px,35px) scale(.9) rotate(-4deg)}}@keyframes holi-splash-shift{0%,to{filter:hue-rotate(0deg)}50%{filter:hue-rotate(15deg)}}.holi-pulse{animation:holi-pulse 2s ease-in-out infinite}