:root{--bg: #F6F1EB;--paper: #FFFDF8;--paper-lines: #E8DDD0;--envelope-front: #E6D5BC;--envelope-front-dark: #D9C5A8;--envelope-shadow: rgba(120, 90, 50, .15);--seal: #C75B5B;--seal-dark: #A84444;--ink: #3B2F26;--ink-light: #7A6B5D;--ink-faint: #B0A090;--accent: #C9956B;--accent-gold: #C4A24E;--love: #D46A6A;--secret-bg: #FFF0F0}*{margin:0;padding:0;box-sizing:border-box}html,body{min-height:100%}body{background-color:var(--bg);font-family:Lora,serif;color:var(--ink);min-height:100vh;overflow-x:hidden;transition:background-color 4s ease}body[data-phase=morning]{background-color:#f6f1eb}body[data-phase=midday]{background-color:#f1e6d3}body[data-phase=afternoon]{background-color:#ecddc6}body[data-phase=evening]{background-color:#e4d1b5}body[data-phase=night]{background-color:#d9c2a1}body:after{content:"";position:fixed;inset:0;pointer-events:none;opacity:.03;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter 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.5rem}.bday-card{position:relative;background:linear-gradient(170deg,#fffdf6,#fbf3e3);border-radius:10px;padding:2rem 1.8rem 1.6rem;box-shadow:0 10px 30px #785a322e,0 2px 6px #0000000f,inset 0 1px #fff9;transform:rotate(-.4deg);opacity:0;animation:fadeIn 1.2s ease 1.4s forwards;overflow:hidden}.bday-card:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,transparent,transparent 40px,rgba(120,90,50,.015) 40px,rgba(120,90,50,.015) 41px);pointer-events:none}.bday-card:after{content:"";position:absolute;inset:10px;border:1px solid rgba(196,162,78,.35);border-radius:6px;pointer-events:none}.bday-card-inner{position:relative;z-index:1}.bday-card-pretitle{font-family:Caveat,cursive;font-size:1.1rem;color:var(--accent-gold);text-align:center;margin-bottom:.3rem;letter-spacing:.02em}.bday-card-greeting{font-family:"DM Serif Display",serif;font-style:italic;font-size:clamp(1.7rem,5vw,2.2rem);color:var(--ink);text-align:center;margin-bottom:1rem}.bday-card-body{font-family:Caveat,cursive;font-size:1.35rem;line-height:1.5;color:var(--ink);margin:0 0 .9rem}.bday-card-body em{color:var(--love);font-style:italic}.bday-card-close{margin-top:.4rem;color:var(--love)}.bday-card-highlights{list-style:none;padding:.8rem 0 .6rem;margin:.6rem 0 .9rem;border-top:1px dashed rgba(196,162,78,.4);border-bottom:1px dashed rgba(196,162,78,.4);font-family:Caveat,cursive;font-size:1.25rem;color:var(--ink-light)}.bday-card-highlights li{padding:.2rem .2rem .2rem 1.1rem;line-height:1.35;position:relative}.bday-card-highlights li:before{content:"·";position:absolute;left:.2rem;top:-.05rem;color:var(--accent-gold);font-size:1.4rem;line-height:1}.bday-card-sign{font-family:Caveat,cursive;font-size:1.4rem;color:var(--accent);text-align:right;margin-top:.8rem}.bday-card-sign .sign-heart{color:var(--love);display:inline-block;animation:heartbeat 1.6s ease-in-out infinite}@media(max-width:540px){.card-wrap{padding:.5rem .8rem .25rem}.bday-card{padding:1.6rem 1.3rem 1.3rem}.bday-card-body{font-size:1.25rem}.bday-card-highlights{font-size:1.15rem}}.letters{max-width:520px;margin:0 auto;padding:2rem 1.2rem 3rem;display:flex;flex-direction:column;gap:1.8rem}.letter{position:relative;opacity:0;transform:translateY(30px);cursor:pointer;-webkit-tap-highlight-color:transparent;transition:opacity .9s ease,filter .9s ease}.letter.visible{animation:slideIn .6s ease forwards}.letter:nth-child(1).visible{animation-delay:1.2s}.letter:nth-child(2).visible{animation-delay:1.35s}.letter:nth-child(3).visible{animation-delay:1.5s}.letter:nth-child(4).visible{animation-delay:1.65s}.letter:nth-child(5).visible{animation-delay:1.8s}.letter:nth-child(6).visible{animation-delay:1.95s}.letter:nth-child(7).visible{animation-delay:2.1s}.letter:nth-child(8).visible{animation-delay:2.25s}.letter-envelope{background:linear-gradient(170deg,var(--envelope-front) 0%,var(--envelope-front-dark) 100%);border-radius:8px;padding:1.3rem 1.5rem;box-shadow:0 2px 8px var(--envelope-shadow),0 1px 2px #0000000f,inset 0 1px #ffffff4d;position:relative;z-index:2;transition:transform .3s ease,box-shadow .3s ease;overflow:hidden}.letter-envelope:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,transparent,transparent 40px,rgba(0,0,0,.01) 40px,rgba(0,0,0,.01) 41px);pointer-events:none}.letter:not(.opened):not(.locked):hover .letter-envelope{transform:translateY(-2px) rotate(-.3deg);box-shadow:0 6px 20px var(--envelope-shadow),0 2px 4px #00000014}.letter-top-row{display:flex;align-items:center;justify-content:space-between;gap:1rem}.letter-when{font-family:Caveat,cursive;font-size:1.4rem;font-weight:600;color:var(--ink)}.letter-time-badge{font-family:Caveat,cursive;font-size:1rem;color:var(--ink-light);background:#fff6;padding:.15rem .7rem;border-radius:20px;white-space:nowrap}.letter-seal{position:absolute;right:1.2rem;top:50%;transform:translateY(-50%);width:36px;height:36px;border-radius:50%;background:radial-gradient(circle at 38% 38%,var(--seal),var(--seal-dark));box-shadow:0 2px 6px #c75b5b59;display:flex;align-items:center;justify-content:center;transition:opacity .5s ease,transform .6s ease;pointer-events:none}.letter-seal:after{content:"♥";color:#ffffffd9;font-size:.9rem;margin-top:1px}.letter.opened .letter-seal{opacity:0;transform:translateY(-50%) scale(.3) rotate(20deg)}.letter-note{max-height:0;overflow:hidden;transition:max-height .6s cubic-bezier(.4,0,.2,1),padding .4s ease,opacity .4s ease;opacity:0;background:var(--paper);margin-top:0;border-radius:0 0 8px 8px;position:relative;z-index:1;box-shadow:0 4px 12px #0000000f}.letter.opened .letter-note{max-height:400px;opacity:1;padding:1.5rem 1.5rem 1.3rem;margin-top:-4px}.letter-note:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(to bottom,transparent,transparent 31px,var(--paper-lines) 31px,var(--paper-lines) 32px);opacity:.5;pointer-events:none}.letter-note:after{content:"";position:absolute;top:0;left:42px;bottom:0;width:1px;background:#e8b4b4;opacity:.4;pointer-events:none}.note-activity{font-family:"DM Serif Display",serif;font-size:1.35rem;color:var(--ink);margin-bottom:.6rem;position:relative}.note-location{font-family:Lora,serif;font-size:.95rem;color:var(--ink-light);display:flex;align-items:center;gap:.4rem;margin-bottom:.4rem}.note-location .pin{color:var(--love);font-size:1rem}.note-time{font-family:Lora,serif;font-size:.95rem;color:var(--ink-light);display:flex;align-items:center;gap:.4rem;margin-bottom:.4rem;position:relative}.note-time .clock{font-size:.95rem}.note-personal{font-family:Caveat,cursive;font-size:1.15rem;color:var(--accent);margin-top:.8rem;padding-top:.6rem;border-top:1px dashed var(--paper-lines);line-height:1.4}.note-emoji{font-size:1.6rem;position:absolute;top:-.1rem;right:0}.letter.secret .letter-envelope{background:linear-gradient(170deg,#f2ddd5,#eacfc4);border:1.5px dashed var(--love)}.letter.secret .letter-when{color:var(--love)}.letter.secret .letter-note{background:var(--secret-bg)}.letter.locked{opacity:.58;filter:saturate(.85)}.letter.locked .letter-envelope{cursor:not-allowed}.letter.opened .letter-envelope{box-shadow:0 1px 4px var(--envelope-shadow),0 1px 2px #0000000a}.footer{text-align:center;padding:1rem 2rem 4rem;opacity:0;animation:fadeIn 1s ease 3s forwards}.footer-heart{font-size:1.5rem;color:var(--love);display:inline-block;animation:heartbeat 1.5s ease-in-out infinite;cursor:pointer;user-select:none;-webkit-tap-highlight-color:transparent}.footer-text{font-family:Caveat,cursive;font-size:1.2rem;color:var(--ink-faint);margin-top:.5rem}.float-heart{position:fixed;pointer-events:none;z-index:100;opacity:0;font-size:1.2rem}.confetti-piece{position:fixed;width:8px;height:14px;top:-20px;z-index:101;pointer-events:none;border-radius:1px;opacity:.9}.toast{position:fixed;left:50%;bottom:2rem;transform:translate(-50%,20px);background:var(--ink);color:var(--paper);font-family:Caveat,cursive;font-size:1.25rem;padding:.7rem 1.4rem;border-radius:999px;box-shadow:0 6px 24px #0000002e;opacity:0;pointer-events:none;transition:opacity .4s ease,transform .4s ease;z-index:200;max-width:85vw;text-align:center}.toast.show{opacity:1;transform:translate(-50%)}.finale-message{max-width:520px;margin:0 auto;padding:0 1.2rem 5rem;text-align:center;opacity:0;transform:translateY(20px);pointer-events:none;transition:opacity 1.8s ease,transform 1.8s ease}.finale-message.revealed{opacity:1;transform:translateY(0);pointer-events:auto}.finale-title{font-family:"DM Serif Display",serif;font-style:italic;font-size:clamp(1.6rem,4vw,2.2rem);color:var(--love);margin-bottom:.6rem}.finale-text{font-family:Caveat,cursive;font-size:1.3rem;color:var(--ink-light);line-height:1.5}.modal-backdrop{position:fixed;inset:0;background:#281c128c;display:flex;align-items:center;justify-content:center;padding:1.5rem;z-index:300;opacity:0;pointer-events:none;transition:opacity .3s ease}.modal-backdrop.show{opacity:1;pointer-events:auto}.modal{background:var(--paper);border-radius:14px;padding:2rem 1.8rem 1.6rem;max-width:340px;width:100%;box-shadow:0 20px 60px #00000040;position:relative;transform:translateY(12px) scale(.97);transition:transform .35s ease}.modal-backdrop.show .modal{transform:translateY(0) scale(1)}.modal-title{font-family:"DM Serif Display",serif;font-size:1.4rem;color:var(--ink);margin-bottom:.3rem;text-align:center}.modal-subtitle{font-family:Caveat,cursive;font-size:1.1rem;color:var(--ink-light);text-align:center;margin-bottom:1.2rem}.modal-input{width:100%;background:transparent;border:none;border-bottom:1.5px solid var(--paper-lines);font-family:Lora,serif;font-size:1.1rem;color:var(--ink);padding:.6rem .2rem;text-align:center;outline:none;transition:border-color .2s ease}.modal-input:focus{border-color:var(--accent-gold)}.modal-input.shake{animation:shake .4s ease;border-color:var(--love)}.modal-hint{font-family:Caveat,cursive;color:var(--ink-faint);font-size:.95rem;text-align:center;margin-top:.6rem;min-height:1.2em}.modal-close{position:absolute;top:.6rem;right:.8rem;background:none;border:none;font-size:1.4rem;color:var(--ink-faint);cursor:pointer;line-height:1;padding:.2rem .4rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes heartbeat{0%,to{transform:scale(1)}15%{transform:scale(1.15)}30%{transform:scale(1)}45%{transform:scale(1.1)}60%{transform:scale(1)}}@keyframes popHeart{0%{opacity:1;transform:translate(-50%) scale(.5)}50%{opacity:1;transform:translate(-50%,-40px) scale(1.1)}to{opacity:0;transform:translate(-50%,-90px) scale(.6) rotate(15deg)}}@keyframes confettiFall{0%{transform:translateY(0) rotate(0);opacity:1}to{transform:translateY(110vh) rotate(720deg);opacity:0}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@media(max-width:540px){.letters{padding:1.5rem .8rem 3rem;gap:1.4rem}.letter-envelope{padding:1.1rem 1.2rem}.letter-when{font-size:1.25rem}.letter.opened .letter-note{padding:1.2rem}.letter-seal{width:30px;height:30px;right:1rem}.letter-seal:after{font-size:.75rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}