:root{--primary-gold: #D4AF37;--gold-glow: rgba(212, 175, 55, .35);--font-serif: "Cinzel", serif;--font-cormorant: "Cormorant Garamond", serif;--font-sans: "Montserrat", sans-serif;--bg-outer: #1e1713;--container-bg-start: #FFEBE0;--container-bg-end: #FAF3E8;--card-bg: rgba(255, 253, 249, .95);--text-dark: #3E342B;--text-muted: #7E7063;--text-gold: #B8860B;--green-accent: #4A6B53;--rose-accent: #C87A7A;--burgundy-accent: #8A1232;--field-bg: #FFFFFF;--field-border: rgba(184, 134, 11, .25);--edge-glow-start: rgba(212, 175, 55, .32);--edge-glow-mid: rgba(212, 175, 55, .12);--edge-glow-end: rgba(212, 175, 55, 0);--edge-shadow: rgba(212, 175, 55, .4);--beam-glow-start: rgba(255, 235, 180, .22);--beam-glow-mid: rgba(255, 220, 150, .06);--beam-glow-end: rgba(255, 220, 150, 0);--header-bg: rgba(255, 255, 255, .12);--header-border: rgba(255, 255, 255, .25);--header-icon-color: #5E5043;--header-shadow: rgba(0, 0, 0, .05)}body.dark-theme{--bg-outer: #050b14;--container-bg-start: 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0%,transparent 70%);width:65%;max-width:380px;margin:0 auto}.env-bg-border-line{width:80%;max-width:360px;height:1px;background:linear-gradient(to right,transparent,rgba(212,175,55,.65),transparent);margin-bottom:8px}.env-bg-flourish{font-family:var(--font-cormorant);font-size:clamp(.8rem,2vw,1.05rem);color:#ecc37bbf;letter-spacing:3px;text-shadow:0 0 10px rgba(212,175,55,.45);white-space:nowrap}.env-corner-filigree{position:absolute;font-size:clamp(1.2rem,3.2vw,1.8rem);color:#d4af376b;pointer-events:none;z-index:1;text-shadow:0 0 10px rgba(212,175,55,.35);transition:opacity .5s;line-height:1}.env-corner-filigree.top-left{top:14px;left:16px}.env-corner-filigree.top-right{top:14px;right:16px}.env-corner-filigree.bottom-left{bottom:14px;left:16px}.env-corner-filigree.bottom-right{bottom:14px;right:16px}.env-dot{position:absolute;border-radius:50%;pointer-events:none;will-change:transform,opacity}.env-dot.gold{background:radial-gradient(circle,rgba(232,200,90,.9),rgba(212,175,55,.2),transparent);box-shadow:0 0 4px #d4af374d}.env-dot.white{background:radial-gradient(circle,rgba(255,255,255,.7),rgba(255,255,255,.1),transparent)}@keyframes envDotFloat{0%{transform:translateY(0) scale(0);opacity:0}15%{transform:translateY(-8px) scale(1);opacity:1}85%{opacity:.5}to{transform:translateY(var(--dy)) scale(.2);opacity:0}}.envelope-wrapper{position:relative;z-index:2;display:flex;align-items:center;justify-content:center;animation:envEntrance 1s cubic-bezier(.22,1,.36,1) forwards}@keyframes envEntrance{0%{transform:translateY(60px) scale(.85);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}#envelope{position:relative;width:clamp(280px,75vw,380px);height:clamp(180px,48vw,240px);border-bottom-left-radius:8px;border-bottom-right-radius:8px;background:linear-gradient(170deg,#5a1228,#4a0e2a,#3d0820);box-shadow:0 8px 40px #0006,0 2px 12px #4a0e2a4d,inset 0 -2px 8px #00000026;cursor:pointer;border:2px solid rgba(212,175,55,.25);border-top:none}.front{position:absolute;width:0;height:0;z-index:3}.flap{border-left:calc(clamp(280px,75vw,380px)/2) solid transparent;border-right:calc(clamp(280px,75vw,380px)/2) solid transparent;border-bottom:calc(clamp(180px,48vw,240px)*.46) solid transparent;border-top:calc(clamp(180px,48vw,240px)*.54) solid #4A0E2A;transform-origin:top;filter:drop-shadow(0 2px 4px rgba(0,0,0,.15))}.pocket{border-left:calc(clamp(280px,75vw,380px)/2) solid #6A1530;border-right:calc(clamp(280px,75vw,380px)/2) solid #6A1530;border-bottom:calc(clamp(180px,48vw,240px)/2) solid #5A1228;border-top:calc(clamp(180px,48vw,240px)/2) solid transparent;border-bottom-left-radius:8px;border-bottom-right-radius:8px}.letter{position:relative;background:linear-gradient(160deg,#fff9f0,#fdf5e6 40%,#fcf0db);width:90%;margin-left:auto;margin-right:auto;height:90%;top:5%;border-radius:6px;box-shadow:0 2px 20px #0000001a;z-index:1;overflow:hidden}.letter-inner{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:16px 12px;text-align:center}.letter-ornament{font-size:.8rem;color:#d4af37;letter-spacing:4px}.letter-subtitle{font-family:var(--font-sans);font-size:.7rem;text-transform:uppercase;letter-spacing:2px;color:#8e7b6c;margin:6px 0}.letter-names{font-family:var(--font-serif);font-size:clamp(1.2rem,4vw,1.8rem);font-weight:600;color:#5a1228;margin:4px 0}.letter-names span{color:#d4af37;font-family:var(--font-cormorant)}.letter-invite{font-family:var(--font-cormorant);font-size:.8rem;font-style:italic;color:#8e7b6c;margin:4px 0}.letter-date{font-family:var(--font-serif);font-size:.95rem;font-weight:700;color:#5a1228;letter-spacing:1px;margin:6px 0}.letter-venue{font-family:var(--font-sans);font-size:.7rem;text-transform:uppercase;letter-spacing:1.5px;color:#8e7b6c}.open .flap{transform:rotateX(180deg);transition:transform .5s ease,z-index .6s;z-index:1}.close .flap{transform:rotateX(0);transition:transform .5s .6s ease,z-index 1s;z-index:5}.close .letter{transform:translateY(0);transition:transform .5s ease,z-index 1s;z-index:1}.open .letter{transform:translateY(-80px);transition:transform .5s .6s ease,z-index .6s;z-index:2}.sparkle{position:absolute;bottom:0;font-size:1rem;color:#e8c85a;opacity:0}.open .sparkle.s1{left:15%;opacity:1;animation:sparkleRise 3.5s ease-out .8s forwards,sparkleSway 2s ease-in-out .8s 3 alternate}.open .sparkle.s2{left:45%;opacity:1;animation:sparkleRise 4s ease-out .8s forwards,sparkleSway 3s ease-in-out .8s 2 alternate}.open .sparkle.s3{left:75%;opacity:1;animation:sparkleRise 3s ease-out .8s forwards,sparkleSway 2.5s ease-in-out .8s 3 alternate}@keyframes sparkleRise{0%{top:120px;opacity:1}70%{opacity:.8}to{top:-450px;opacity:0}}@keyframes sparkleSway{0%{margin-left:0}to{margin-left:40px}}.burst-dot{position:absolute;border-radius:50%;pointer-events:none;z-index:99999;will-change:transform,opacity}@keyframes burstDotAnim{0%{transform:translate(0) scale(1);opacity:1}to{transform:translate(var(--bx),var(--py)) scale(.2);opacity:0}}.envelope-wrapper.exiting{animation:envExit 1.2s cubic-bezier(.4,0,.2,1) forwards}@keyframes envExit{0%{transform:translateY(0) scale(1);opacity:1}to{transform:translateY(-120vh) scale(.6);opacity:0}}.main-content{opacity:0;transition:opacity 1.2s ease}.main-content.visible{opacity:1}.env-prompt{display:flex;align-items:center;gap:8px;background:#ffffff14;border:1px solid rgba(255,255,255,.15);padding:10px 20px;border-radius:20px;box-shadow:0 4px 15px #0003;color:#faf3e8;font-family:var(--font-sans);font-size:.85rem;letter-spacing:1px;transition:opacity .5s ease;z-index:2;cursor:pointer;animation:envPromptPulse 2s infinite ease-in-out alternate}.env-prompt.hiding{opacity:0;pointer-events:none}@keyframes envPromptPulse{0%{transform:scale(.96);opacity:.7}to{transform:scale(1.04);opacity:1}}.floating-controls-left{position:fixed;bottom:20px;left:20px;display:flex;gap:12px;z-index:11000;pointer-events:auto}.floating-controls-right{position:fixed;bottom:20px;right:20px;display:flex;gap:12px;z-index:11000;pointer-events:auto}.floating-control-btn{width:46px;height:46px;border-radius:50%;background:var(--header-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--header-border);box-shadow:0 4px 15px var(--header-shadow);display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--header-icon-color);font-size:1.15rem;transition:all .3s ease;outline:none}.floating-control-btn:hover,.floating-control-btn:active{transform:translateY(-2px);box-shadow:0 6px 20px var(--header-shadow);background:#ffffff26}.floating-control-btn.active-music{color:var(--text-gold)}.envelope-border{position:absolute;top:12px;right:12px;bottom:12px;left:12px;border:1px dashed rgba(212,175,55,.35);border-radius:6px;z-index:4;pointer-events:none}.envelope-seal{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(1);width:58px;height:58px;background:radial-gradient(circle at 35% 35%,#bf2042,#870d25 70%,#5c0414);border-radius:51% 49% 52% 48%/48% 53% 47% 52%;border:1.5px solid rgba(212,175,55,.85);box-shadow:0 6px 15px #00000080,inset 0 2px 4px #ffffff40,inset 0 -3px 5px #00000080;display:flex;align-items:center;justify-content:center;z-index:6;cursor:pointer;transition:opacity .4s ease,transform .4s ease}.envelope-seal .seal-text{font-family:var(--font-serif);font-size:1.1rem;font-weight:700;color:#ecc37b;text-shadow:1px 1px 2px rgba(0,0,0,.6);letter-spacing:1px}.open .envelope-seal{opacity:0;transform:translate(-50%,-50%) scale(.6);pointer-events:none}.close .envelope-seal{opacity:1;transform:translate(-50%,-50%) scale(1)}.flap-decor{position:absolute;top:0;left:0;width:100%;height:100%;transform-origin:top;z-index:5;pointer-events:none;transform-style:preserve-3d;backface-visibility:hidden;-webkit-backface-visibility:hidden}.open .flap-decor{transform:rotateX(180deg);transition:transform .5s ease,z-index .6s;z-index:1}.close .flap-decor{transform:rotateX(0);transition:transform .5s .6s ease,z-index 1s;z-index:5}.flap-surface-content{position:absolute;top:0;left:0;width:100%;height:calc(clamp(180px,48vw,240px)*.54);display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding-top:clamp(8px,2.2vw,14px);box-sizing:border-box;z-index:5;pointer-events:none}.flap-gold-trim{position:absolute;top:0;left:0;width:100%;height:100%;clip-path:polygon(0 0,100% 0,50% 100%,50% 96%,98% 0,2% 0);background:linear-gradient(135deg,#d4af37bf,#eec85a73,#d4af37d9);pointer-events:none}.flap-crest{font-size:clamp(.65rem,2vw,.82rem);color:#ecc37b;letter-spacing:4px;text-shadow:0 1px 3px rgba(0,0,0,.6);margin-bottom:2px}.flap-title{font-family:var(--font-serif);font-size:clamp(.52rem,1.6vw,.68rem);font-weight:600;color:#e8c85a;letter-spacing:2.5px;text-transform:uppercase;text-shadow:0 1px 2px rgba(0,0,0,.7);margin-bottom:2px}.flap-names{font-family:var(--font-cormorant);font-style:italic;font-weight:600;font-size:clamp(.95rem,3.2vw,1.4rem);color:#fffdf0;text-shadow:0 2px 4px rgba(0,0,0,.7);line-height:1.1}.flap-bottom-flourish{font-size:clamp(.65rem,1.8vw,.85rem);color:#ecc37b;margin-top:2px;text-shadow:0 1px 3px rgba(0,0,0,.6)}.pocket-decor-left,.pocket-decor-right{position:absolute;bottom:16px;font-size:1.2rem;color:#d4af3761;z-index:4;pointer-events:none;text-shadow:0 1px 3px rgba(0,0,0,.2);transition:opacity .4s ease}.pocket-decor-left{left:16px}.pocket-decor-right{right:16px}.open .pocket-decor-left,.open .pocket-decor-right{opacity:.15}.close .pocket-decor-left,.close .pocket-decor-right{opacity:1}