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var(--color-card-border);color:#fff;width:36px;height:36px;border-radius:50%;font-size:1.1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition-fast);z-index:1002}.close-modal-btn:hover{background:#fff;color:var(--color-text-primary);transform:rotate(90deg)}.envelope-wrapper{position:relative;width:100%;max-width:550px;display:flex;flex-direction:column;align-items:center}.envelope-container{width:450px;height:320px;position:relative;cursor:pointer;perspective:1000px;margin:2rem 0}.envelope-back{position:absolute;width:100%;height:100%;background-color:#8a8abd;border-radius:10px;box-shadow:var(--shadow-md);z-index:1}.envelope-flap{position:absolute;width:100%;height:100%;background-color:#7a7ab0;border-radius:10px;clip-path:polygon(0 0,50% 55%,100% 0);z-index:5;transform-origin:top;transition:transform .6s ease}.envelope-container.open 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Neue,sans-serif;font-size:1.8rem;color:var(--color-text-secondary);margin-top:.4rem}.letter-body{font-family:Playfair Display,serif;font-size:1.2rem;line-height:1.5;font-style:italic;color:var(--color-text-primary);margin:.8rem 0;text-align:center}.letter-footer{font-size:.8rem;color:var(--color-text-secondary);text-align:right;border-top:1px solid #d0d4ec;padding-top:.4rem}.letter-fav-btn{align-self:center;background:none;border:1px solid #d0d4ec;border-radius:20px;padding:.3rem .8rem;font-family:Quicksand,sans-serif;font-size:.8rem;font-weight:600;color:var(--color-text-secondary);cursor:pointer;display:flex;align-items:center;gap:.3rem;margin-top:.2rem;transition:var(--transition-fast)}.letter-fav-btn:hover{background:#d0d4ec;color:var(--color-text-primary)}.letter-fav-btn.is-fav{background:#e8ecf8;border-color:#b0b8da;color:var(--color-heart)}.envelope-hint{color:#fff;font-size:.95rem;text-align:center;font-weight:500;text-shadow:0 2px 4px rgba(0,0,0,.2);animation:hint-glow 1.5s infinite alternate}@keyframes hint-glow{0%{opacity:.7;transform:translateY(0)}to{opacity:1;transform:translateY(-4px)}}.playlist-modal-wrapper{background:#fffffff2;backdrop-filter:blur(20px);border-radius:20px;border:1px solid rgba(183,162,208,.4);box-shadow:var(--shadow-lg);padding:2rem 1.5rem;width:90%;max-width:480px;max-height:80vh;overflow-y:auto;position:relative;animation:card-fade-in .4s ease forwards}.playlist-modal-header{text-align:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid rgba(183,162,208,.25)}.playlist-modal-icon{font-size:2.5rem;display:block;margin-bottom:.5rem}.playlist-modal-title{font-family:Bebas Neue,sans-serif;font-size:2rem;color:var(--color-text-primary);margin:0;letter-spacing:.05em}.playlist-modal-subtitle{font-size:.85rem;color:var(--color-text-secondary);margin:.2rem 0 0}.playlist-modal-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.4rem}.playlist-modal-item{display:flex;align-items:center;gap:.8rem;padding:.7rem 1rem;border-radius:12px;cursor:pointer;transition:var(--transition-fast);border:1px solid transparent}.playlist-modal-item:hover{background:#7472af14;border-color:#7472af26}.playlist-modal-item.active-track{background:#7472af1f;border-color:#7472af4d}.playlist-config-section{margin-top:1rem;padding-top:.8rem;border-top:1px solid rgba(183,162,208,.25)}.playlist-config-toggle{background:none;border:none;cursor:pointer;font-family:Quicksand,sans-serif;font-size:.8rem;font-weight:600;color:var(--color-text-secondary);padding:.4rem .6rem;border-radius:8px;transition:var(--transition-fast);width:100%;text-align:center}.playlist-config-toggle:hover{background:#7472af14;color:var(--color-text-primary)}.playlist-config-body{display:none;padding:.8rem .2rem}.playlist-config-form{display:flex;flex-direction:column;gap:.6rem;margin-bottom:.8rem}.playlist-config-label{font-family:Quicksand,sans-serif;font-size:.78rem;font-weight:700;color:var(--color-text-secondary)}.playlist-config-row{display:flex;gap:.5rem}.playlist-config-input{flex:1;padding:.5rem .8rem;border:1px solid rgba(116,114,175,.25);border-radius:10px;font-family:Quicksand,sans-serif;font-size:.82rem;color:var(--color-text-primary);background:#ffffffb3;outline:none;transition:var(--transition-fast)}.playlist-config-input:focus{border-color:var(--color-accent);background:#fff;box-shadow:0 0 0 3px #7472af26}.playlist-config-btn{padding:.5rem 1.2rem;background:var(--color-accent);border:none;border-radius:10px;font-family:Quicksand,sans-serif;font-size:.82rem;font-weight:700;color:#fff;cursor:pointer;transition:var(--transition-fast);white-space:nowrap}.playlist-config-btn:hover{background:var(--color-accent-hover);transform:translateY(-1px)}.playlist-config-apikey{display:flex;flex-direction:column;gap:.4rem}.playlist-config-hint{font-size:.72rem;color:var(--color-text-secondary);line-height:1.4}.playlist-config-hint a{color:var(--color-accent)}.playlist-status{font-size:.82rem;font-weight:600;padding:.4rem 0;min-height:1.5rem}.playlist-preview{display:flex;flex-direction:column;gap:.3rem;max-height:120px;overflow-y:auto;background:#ffffff80;border-radius:8px;padding:.5rem}.playlist-preview-item{font-size:.78rem;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.playlist-reset-btn{background:none;border:1px solid rgba(183,162,208,.3);border-radius:8px;padding:.4rem .8rem;font-family:Quicksand,sans-serif;font-size:.75rem;font-weight:600;color:var(--color-text-secondary);cursor:pointer;transition:var(--transition-fast);width:100%;text-align:center}.playlist-reset-btn:hover{background:#b7a2d01a;color:var(--color-text-primary)}.modal-backdrop.paper-mode{overflow-y:auto;align-items:flex-start;padding:2.5rem 1rem}.modal-backdrop.paper-mode .envelope-wrapper{max-width:800px;width:92%;margin:auto}.modal-backdrop.paper-mode .envelope-container{width:100%;height:auto;cursor:default;perspective:none;margin:0;background:none;box-shadow:none;border-radius:0}.modal-backdrop.paper-mode .envelope-back,.modal-backdrop.paper-mode .envelope-flap,.modal-backdrop.paper-mode .envelope-front,.modal-backdrop.paper-mode .envelope-hint{display:none}.modal-backdrop.paper-mode .letter-card{position:static;width:100%;height:auto;min-height:480px;max-height:82vh;overflow-y:auto;transform:none!important;box-shadow:0 1px 4px #0000000a,0 4px 16px #0000000f,0 12px 48px #0000001a;border-radius:2px;padding:3.5rem 4rem;border:none;z-index:6}.modal-backdrop.paper-mode .letter-stamp{display:none}.modal-backdrop.paper-mode .letter-header{font-size:.9rem;color:var(--color-text-secondary);border-bottom:2px solid #d0d4ec;padding-bottom:1rem;margin-bottom:1.5rem;letter-spacing:.1em}.modal-backdrop.paper-mode .letter-number{font-size:2.8rem;text-align:center;margin-bottom:1rem}.modal-backdrop.paper-mode .letter-body{font-size:1.5rem;line-height:1.7;font-style:italic;text-align:left;margin:1.5rem 0;flex:1}.modal-backdrop.paper-mode .letter-footer{text-align:center;color:var(--color-text-secondary);border-top:1px solid #d0d4ec;padding-top:1rem;font-size:.85rem}.modal-backdrop.paper-mode .letter-fav-btn{align-self:center;margin-top:1.5rem}@media(max-width:600px){.envelope-container{width:320px;height:240px}.letter-card{width:280px;height:200px;left:20px}.envelope-container.open .letter-card{transform:translateY(-80px) scale(1.05);height:240px}.letter-body{font-size:.95rem}.modal-backdrop.paper-mode .envelope-wrapper{width:94%}.modal-backdrop.paper-mode .letter-card{padding:2rem 1.5rem;min-height:420px;max-height:78vh}.modal-backdrop.paper-mode .letter-header{font-size:.8rem;padding-bottom:.8rem;margin-bottom:1rem}.modal-backdrop.paper-mode .letter-number{font-size:2.2rem;margin-bottom:.8rem}.modal-backdrop.paper-mode .letter-body{font-size:1.15rem;line-height:1.65;margin:1rem 0}.modal-backdrop.paper-mode .letter-fav-btn{margin-top:1rem}.close-modal-btn{top:-40px;right:10px;width:32px;height:32px;font-size:1rem}}@media(max-width:380px){.modal-backdrop.paper-mode .letter-card{padding:1.5rem 1rem;min-height:380px;max-height:76vh}.modal-backdrop.paper-mode .letter-number{font-size:1.8rem}.modal-backdrop.paper-mode .letter-body{font-size:1rem;margin:.8rem 0}.modal-backdrop.paper-mode .letter-footer{font-size:.78rem}}