:root{--primary-color: #ff6b6b;--secondary-color: #ff8e8e;--accent-color: #ff4757;--text-color: #2f3542;--background: linear-gradient(135deg, #fff5f5 0%, #ffe3e3 100%)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:var(--background);color:var(--text-color);min-height:100vh;overflow-x:hidden}.container{max-width:1200px;margin:0 auto;padding:2rem;position:relative;z-index:2}.hearts-background{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:1}.heart{position:absolute;font-size:24px;animation:float 6s ease-in infinite;opacity:.6}.title{font-size:3rem;color:var(--accent-color);text-shadow:2px 2px 4px rgba(255,71,87,.2);margin-bottom:1rem;animation:popIn .8s cubic-bezier(.68,-.55,.265,1.55)}.subtitle{font-size:1.5rem;color:var(--primary-color);margin-bottom:2rem;padding:1rem;background:#ffffffe6;border-radius:50px;box-shadow:0 4px 15px #ff6b6b33}.card-surprise{perspective:1000px;margin:3rem 0;width:100%;display:flex;justify-content:center}.card{width:100%;max-width:500px;min-height:350px;height:auto;position:relative;transform-style:preserve-3d;transition:transform .8s;cursor:pointer;margin:0 auto}.card.flipped{transform:rotateY(180deg)}.card-front,.card-back{width:100%;min-height:350px;height:auto;padding:2rem;background:#fff;border-radius:20px;box-shadow:0 10px 30px #ff47574d;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;position:relative;top:0;left:0;transition:opacity .3s;box-sizing:border-box}.card-back{transform:rotateY(180deg);background:linear-gradient(145deg,#ff6b6b,#ff4757);color:#fff;position:absolute;top:0;left:0}.card-front{position:relative}.card-front.hidden,.card-back.hidden{opacity:0;pointer-events:none}.card:not(.flipped) .card-front{opacity:1;pointer-events:all;position:relative;z-index:2}.card:not(.flipped) .card-back{opacity:0;pointer-events:none;position:absolute;z-index:1}.card.flipped .card-front{opacity:0;pointer-events:none;position:absolute;z-index:1}.card.flipped .card-back{opacity:1;pointer-events:all;position:relative;z-index:2;min-height:350px;height:auto}#surprise-content{display:flex;flex-direction:column;align-items:center;width:100%;padding:1rem;box-sizing:border-box}#surprise-message{font-size:1.2rem;line-height:1.6;text-align:center;margin:0 0 1rem;word-wrap:break-word;width:100%}#surprise-message small{font-size:.9rem;opacity:.9;display:block;margin:.5rem 0}#surprise-message strong{font-size:1.1rem;display:block;margin:.5rem 0}.heart-animation{font-size:2rem;animation:heartbeat 1.5s ease-in-out infinite;margin:1rem 0 0}.open-button{padding:1rem 2rem;font-size:1.2rem;background:var(--accent-color);color:#fff;border:none;border-radius:50px;cursor:pointer;transition:transform .3s,box-shadow .3s;margin-top:1rem}.open-button:hover{transform:scale(1.05);box-shadow:0 0 20px #ff475780}.love-meter{margin:4rem 0 3rem;padding:2rem;background:#ffffffe6;border-radius:20px;box-shadow:0 4px 15px #0000001a;clear:both}.messages-section{margin:3rem 0;clear:both}@media (max-width: 768px){.card{max-width:90%}.card-front,.card-back{min-height:300px;padding:1.5rem}#surprise-message{font-size:1rem}.gif-container{max-width:250px}}.gif-container img{max-height:300px;object-fit:contain}.card-back{overflow-y:auto;max-height:600px}.loading-gif{width:50px;height:50px;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite;margin:2rem auto}.meter-container{width:100%;height:30px;background:#ffe3e3;border-radius:15px;overflow:hidden;margin:1rem 0}.meter-fill{height:100%;width:0%;background:linear-gradient(90deg,#ff6b6b,#ff4757);border-radius:15px;transition:width 1s;position:relative;animation:pulse 2s infinite}.message-form{display:flex;flex-direction:column;gap:1rem;margin:2rem 0}.message-form input,.message-form textarea{padding:1rem;border:2px solid #ffe3e3;border-radius:10px;font-size:1rem;transition:border-color .3s}.message-form input:focus,.message-form textarea:focus{outline:none;border-color:var(--accent-color)}.submit-btn{padding:1rem;background:var(--primary-color);color:#fff;border:none;border-radius:10px;font-size:1.1rem;cursor:pointer;transition:background .3s}.submit-btn:hover{background:var(--accent-color)}.submit-btn:disabled{opacity:.6;cursor:not-allowed}.messages-container{margin-top:2rem}.message-item{background:#fff;padding:1rem;margin:1rem 0;border-radius:10px;border-left:5px solid var(--accent-color);box-shadow:0 2px 5px #0000001a}.message-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.message-author{font-weight:700;color:var(--accent-color)}.message-time{font-size:.8rem;color:#999}.message-text{margin:.5rem 0 0;line-height:1.4}.no-messages{text-align:center;color:#999;font-style:italic;padding:2rem}.error{color:#ff4757;text-align:center;padding:1rem}@keyframes float{0%{transform:translateY(0) rotate(0);opacity:.6}to{transform:translateY(-100vh) rotate(720deg);opacity:0}}@keyframes popIn{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.8}}@keyframes slideUp{0%{transform:translateY(50px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes heartbeat{0%,to{transform:scale(1)}25%{transform:scale(1.1)}50%{transform:scale(1)}75%{transform:scale(1.1)}}.animate-pop-in{animation:popIn .8s ease-out}.animate-slide-up{animation:slideUp .8s ease-out}@media (max-width: 768px){.title{font-size:2rem}.subtitle{font-size:1.2rem}.container{padding:1rem}.card-front,.card-back{min-height:300px;padding:1.5rem}}.gif-container{width:100%;max-width:300px;margin:1rem auto;border-radius:15px;overflow:hidden;box-shadow:0 5px 15px #0003}#surprise-gif{width:100%;height:auto;display:block;border-radius:15px;transition:transform .3s}#surprise-gif:hover{transform:scale(1.05)}#surprise-content{display:flex;flex-direction:column;align-items:center;width:100%;padding:1rem}#surprise-message{font-size:1.2rem;line-height:1.6;text-align:center;margin-bottom:1rem}.loading-gif{width:50px;height:50px;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite;margin:1rem auto}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 768px){.gif-container{max-width:250px}}