html,body{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background:#0a0a1a;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{width:100%;height:100%;overflow:hidden}::selection{background:#c0392b4d;color:inherit}*{margin:0;padding:0;box-sizing:border-box}.app{width:100vw;height:100vh;overflow:hidden;position:relative;background:linear-gradient(180deg,#0a0a1a,#1a1a3e 40%,#2d1b4e,#1a0a2e);display:flex;align-items:center;justify-content:center;font-family:Inter,sans-serif}.moon{position:fixed;top:6%;right:12%;width:80px;height:80px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#fff8e7,#f0d890,#c9a84c);box-shadow:0 0 40px 10px #fff8dc4d,0 0 80px 30px #fff8dc26,0 0 120px 60px #fff8dc0d;z-index:1;animation:moonGlow 6s ease-in-out infinite}@keyframes moonGlow{0%,to{box-shadow:0 0 40px 10px #fff8dc4d,0 0 80px 30px #fff8dc26}50%{box-shadow:0 0 50px 15px #fff8dc66,0 0 100px 40px 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20px 60px #00000026,inset 0 1px #fffc;position:relative;opacity:0;transition:opacity .6s ease;max-height:calc(100vh - 80px);display:flex;flex-direction:column;overflow:hidden}.letter-paper:before{content:"";position:absolute;inset:90px 36px 36px;background-image:repeating-linear-gradient(transparent,transparent 31px,rgba(176,160,140,.15) 31px,rgba(176,160,140,.15) 32px);pointer-events:none}.letter-paper:after{content:"";position:absolute;left:32px;top:0;bottom:0;width:1px;background:#c8505026;pointer-events:none}.letter-visible{opacity:1}.letter-header{text-align:center;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid rgba(176,160,140,.2)}.letter-date{font-family:Caveat,cursive;font-size:1rem;color:#9b8b7a}.letter-decoration{font-size:.9rem;color:#b08c7866;margin-top:6px;letter-spacing:8px}.letter-body{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;padding-right:8px;scrollbar-width:thin;scrollbar-color:rgba(176,160,140,.3) 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heartFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}.read-letter-btn{display:inline-flex;align-items:center;justify-content:center;position:relative;padding:14px 36px;border:none;border-radius:50px;background:linear-gradient(135deg,#c0392b,#e74c3c,#c0392b);background-size:200% 200%;color:#fff;font-family:Caveat,cursive;font-size:1.3rem;cursor:pointer;overflow:hidden;transition:transform .3s ease,box-shadow .3s ease;box-shadow:0 4px 15px #c0392b4d;animation:btnGradient 3s ease infinite;margin-top:20px}@keyframes btnGradient{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.read-letter-btn:hover{transform:translateY(-2px) scale(1.05);box-shadow:0 6px 25px #c0392b73}.btn-text{position:relative;z-index:1}.btn-glow{position:absolute;inset:-2px;border-radius:50px;background:linear-gradient(135deg,rgba(255,255,255,.2),transparent);opacity:0;transition:opacity .3s ease}.read-letter-btn:hover .btn-glow{opacity:1}.fade-in-up{animation:fadeInUp 1s ease-out}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){.letter-entrance{padding:20px 16px 36px}.letter-paper{padding:28px 30px;max-height:calc(100vh - 72px)}.letter-paper:before{inset:85px 30px 28px}.letter-paper:after{left:26px}.letter-content{font-size:1.25rem}.letter-greeting{font-size:1.45rem}.moon{width:60px;height:60px;top:5%;right:8%}}@media(max-width:480px){.letter-entrance{padding:16px 12px 32px}.letter-paper{padding:20px 18px;border-radius:6px;max-height:calc(100vh - 64px)}.letter-paper:before{inset:72px 18px 20px}.letter-paper:after{left:14px}.letter-header{margin-bottom:16px;padding-bottom:12px}.letter-date{font-size:.9rem}.letter-decoration{font-size:.75rem;letter-spacing:6px}.letter-greeting{font-size:1.3rem;margin-bottom:14px}.letter-content{font-size:1.1rem;line-height:1.85}.letter-signature{margin-top:24px;padding-top:14px}.signature-line{font-size:1.05rem}.signature-name{font-size:1.5rem}.envelope{width:180px;height:120px}.envelope-flap{height:60px}.envelope-prompt{font-size:.95rem}.tap-hint{font-size:.7rem}.read-letter-btn{padding:12px 28px;font-size:1.15rem}.moon{width:45px;height:45px;top:3%;right:6%}}@media(max-width:360px){.letter-paper{padding:16px 14px;max-height:calc(100vh - 48px)}.letter-content{font-size:1rem;line-height:1.75}.letter-greeting{font-size:1.2rem}.envelope{width:160px;height:105px}.envelope-flap{height:52px}}@media(max-height:500px){.letter-entrance{padding:10px 16px 20px}.letter-paper{padding:16px 24px;max-height:calc(100vh - 40px)}.letter-header{margin-bottom:10px;padding-bottom:8px}.moon{width:35px;height:35px}}