*{box-sizing:border-box;margin:0;padding:0}:root{--primary-color:#8a0303;--hover-primary-color:#5c0202;--bg-color:#fef0f0;--envelope-bg:#fcc;--font-color-2:#600}body{background-color:var(--bg-color);justify-content:center;align-items:center;min-height:100vh;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;display:flex;overflow-x:hidden}.background-animation{pointer-events:none;z-index:0;width:100%;height:100%;position:fixed;top:0;left:0;overflow:hidden}.floating-text{color:#8a030326;white-space:nowrap;font-size:1.5rem;font-weight:800;animation:linear infinite floatUp;position:absolute;bottom:-50px}.floating-text:first-child{animation-duration:12s;animation-delay:0s;left:10%}.floating-text:nth-child(2){animation-duration:15s;animation-delay:2s;left:30%}.floating-text:nth-child(3){animation-duration:10s;animation-delay:5s;left:60%}.floating-text:nth-child(4){animation-duration:14s;animation-delay:1s;left:80%}.floating-text:nth-child(5){animation-duration:11s;animation-delay:7s;left:25%}.floating-text:nth-child(6){font-size:1.2rem;animation-duration:16s;animation-delay:3s;left:70%}.floating-text:nth-child(7){animation-duration:13s;animation-delay:6s;left:45%}.floating-text:nth-child(8){animation-duration:12s;animation-delay:4s;left:85%}@keyframes floatUp{0%{opacity:0;transform:translateY(0)rotate(-5deg)}10%{opacity:1}90%{opacity:1}to{opacity:0;transform:translateY(-110vh)rotate(5deg)}}.container{text-align:center;z-index:1;flex-direction:column;align-items:center;gap:2rem;width:100%;max-width:400px;padding:2rem;display:flex;position:relative}.title{color:var(--primary-color);text-shadow:2px 2px 4px #8a030333;font-size:2.8rem;font-weight:900;line-height:1.1}.cake-image{object-fit:cover;border:5px solid var(--primary-color);background-color:#fff;border-radius:50%;width:220px;height:220px;animation:3s ease-in-out infinite gentleBounce;box-shadow:0 10px 20px #8a030333}@keyframes gentleBounce{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)}}.letter-container{cursor:pointer;background-color:var(--envelope-bg);border:2px dashed var(--primary-color);border-radius:15px;padding:1.5rem 3rem;transition:transform .3s,background-color .3s;box-shadow:0 6px 12px #8a030326}.letter-container:hover{background-color:#ffb3b3;transform:scale(1.05)translateY(-5px)}.envelope-emoji{font-size:3.5rem}.click-me{color:var(--primary-color);margin-top:.5rem;font-weight:700}.modal-overlay{z-index:999;background-color:#14000099;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.modal-content{text-align:left;background-color:#fff9f9;background-image:repeating-linear-gradient(#0000,#0000 29px,#ffd1d1 29px 30px);background-attachment:local;border-radius:12px;width:100%;max-width:340px;max-height:85vh;padding:2.5rem 2rem;animation:.4s cubic-bezier(.175,.885,.32,1.275) slideUp;position:relative;overflow-y:auto;box-shadow:0 15px 30px #0000004d}.modal-content::-webkit-scrollbar{width:6px}.modal-content::-webkit-scrollbar-track{background:0 0}.modal-content::-webkit-scrollbar-thumb{background-color:var(--primary-color);border-radius:10px}@keyframes slideUp{0%{opacity:0;transform:scale(.8)translateY(50px)}to{opacity:1;transform:scale(1)translateY(0)}}.close-btn{background:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:30px;height:30px;font-size:1rem;font-weight:700;display:flex;position:absolute;top:15px;right:15px;box-shadow:0 2px 5px #0003}.paper h2{color:var(--font-color-2);margin-bottom:1rem;font-family:Georgia,serif}.paper p{color:#333;margin-bottom:1rem;font-weight:500;line-height:30px}.signature{text-align:right;color:var(--primary-color);font-style:italic;font-weight:700}.song-link-btn{text-align:center;background-color:var(--primary-color);color:#fff;border-radius:25px;margin-top:1.5rem;padding:.8rem 1rem;font-weight:700;text-decoration:none;transition:background-color .3s,transform .2s;display:block;box-shadow:0 4px 8px #8a03034d}.song-link-btn:hover{background-color:var(--hover-primary-color);transform:translateY(-2px)}