@import "https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Outfit:wght@300;400;500;600;700&display=swap";:root{--bg-primary:#f5f2eb;--bg-secondary:#ebdccb;--card-bg:#fff;--text-main:#3d3a35;--text-muted:#7d776c;--accent-color:#8b7355;--accent-hover:#6e593f;--danger-color:#a85858;--danger-hover:#8a4141;--shadow-sm:0 2px 8px #3d3a350d;--shadow-md:0 8px 24px #3d3a3514;--shadow-lg:0 16px 40px #3d3a351f;--font-family:"Outfit", "Noto Sans JP", sans-serif;--transition-smooth:all .4s cubic-bezier(.25, .8, .25, 1);--transition-quick:all .2s ease}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-main);font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}.app-container{flex-direction:column;min-height:100vh;display:flex}.app-header{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:100;transition:var(--transition-quick);background-color:#f5f2ebcc;border-bottom:1px solid #3d3a350f;justify-content:space-between;align-items:center;padding:1.25rem 2rem;display:flex;position:sticky;top:0}.brand{color:var(--text-main);letter-spacing:-.02em;align-items:center;gap:.75rem;font-size:1.4rem;font-weight:600;text-decoration:none;display:flex}.brand-icon{color:var(--accent-color);width:28px;height:28px}.nav-actions{align-items:center;gap:1rem;display:flex}.btn{font-family:var(--font-family);cursor:pointer;transition:var(--transition-quick);border:none;border-radius:8px;align-items:center;gap:.5rem;padding:.6rem 1.2rem;font-size:.9rem;font-weight:500;display:inline-flex}.btn-primary{background-color:var(--accent-color);color:#fff}.btn-primary:hover{background-color:var(--accent-hover);transform:translateY(-1px)}.btn-secondary{color:var(--text-main);background-color:#0000;border:1px solid #3d3a3526}.btn-secondary:hover{background-color:#3d3a350d}.btn-danger{color:var(--danger-color);background-color:#0000;border:1px solid #a8585833}.btn-danger:hover{background-color:#a858580d}.btn-icon-only{border-radius:50%;padding:.6rem}.main-content{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:2rem}.page-title-section{border-bottom:1px dashed #3d3a351f;justify-content:space-between;align-items:flex-end;margin-bottom:2.5rem;padding-bottom:1.25rem;display:flex}.page-title{letter-spacing:-.02em;color:var(--text-main);align-items:center;gap:.75rem;font-size:2rem;font-weight:700;display:flex}.page-subtitle{color:var(--text-muted);margin-top:.25rem;font-size:.95rem}.cheki-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));justify-items:center;gap:2.5rem;width:100%;padding:1rem 0 4rem;display:grid}.cheki-card-container{perspective:1200px;aspect-ratio:54/86;width:100%;max-width:280px}.cheki-card{width:100%;height:100%;transform-style:preserve-3d;cursor:pointer;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.cheki-card-container.is-flipped .cheki-card{transform:rotateY(180deg)}.cheki-card-face{backface-visibility:hidden;background-color:var(--card-bg);width:100%;height:100%;box-shadow:var(--shadow-md);transition:var(--transition-smooth);border:1px solid #3d3a3514;border-radius:8px;flex-direction:column;padding:0;display:flex;position:absolute;overflow:hidden}.cheki-card-container:not(.is-flipped):hover .cheki-card-face-front{box-shadow:var(--shadow-lg);transform:translateY(-6px)rotate(.5deg)}.cheki-card-container.is-flipped:hover .cheki-card-face-back{box-shadow:var(--shadow-lg);transform:rotateY(180deg)translateY(-6px)rotate(-.5deg)}.cheki-card-face-front{z-index:2;transform:rotateY(0)}.cheki-card-face-back{justify-content:space-between;transform:rotateY(180deg)}.cheki-image-wrapper{background-color:#fcfcfc;width:100%;height:100%;position:relative;overflow:hidden}.cheki-image{object-fit:cover;width:100%;height:100%;transition:var(--transition-smooth)}.cheki-footer{text-align:center;flex-direction:column;justify-content:center;align-items:center;margin-top:14px;display:flex}.cheki-date{color:#5d584e;letter-spacing:.05em;border-bottom:1px solid #3d3a351a;width:80%;padding-bottom:2px;font-family:Outfit,sans-serif;font-size:.95rem;font-weight:500}.cheki-actions{opacity:0;transition:var(--transition-quick);z-index:10;position:absolute;top:10px;right:10px}.cheki-card-container:hover .cheki-actions{opacity:1}.btn-delete-cheki{color:var(--danger-color);width:32px;height:32px;box-shadow:var(--shadow-sm);cursor:pointer;transition:var(--transition-quick);background-color:#ffffffe6;border:none;border-radius:50%;justify-content:center;align-items:center;display:flex}.btn-delete-cheki:hover{background-color:var(--danger-color);color:#fff}.cheki-back-date{color:var(--text-muted);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:5;letter-spacing:.05em;pointer-events:none;background-color:#ffffffd9;border:1px solid #3d3a350f;border-radius:20px;padding:3px 10px;font-family:Outfit,sans-serif;font-size:.8rem;font-weight:500;position:absolute;bottom:12px;left:50%;transform:translate(-50%);box-shadow:0 1px 6px #0000000d}.cheki-back-placeholder{color:var(--text-muted);text-align:center;border:1px dashed #3d3a3526;border-radius:2px;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:1.5rem;display:flex}.cheki-back-icon{opacity:.4;width:48px;height:48px;margin-bottom:1rem}.album-grid{grid-template-cols:repeat(auto-fill, minmax(280px, 1fr));gap:1.5rem;margin-top:1rem;display:grid}.album-card{background-color:var(--card-bg);cursor:pointer;box-shadow:var(--shadow-sm);transition:var(--transition-smooth);border:1px solid #3d3a3514;border-radius:12px;flex-direction:column;justify-content:space-between;min-height:160px;padding:1.5rem;display:flex;position:relative;overflow:hidden}.album-card:before{content:"";background-color:var(--accent-color);width:100%;height:4px;transition:var(--transition-smooth);transform-origin:0;position:absolute;top:0;left:0;transform:scaleX(0)}.album-card:hover{box-shadow:var(--shadow-md);border-color:#3d3a3526;transform:translateY(-4px)}.album-card:hover:before{transform:scaleX(1)}.album-card-title{color:var(--text-main);margin-bottom:.5rem;font-size:1.25rem;font-weight:600;line-height:1.4}.album-card-footer{border-top:1px solid #3d3a350d;justify-content:space-between;align-items:center;margin-top:auto;padding-top:.75rem;display:flex}.album-card-date{color:var(--text-muted);font-size:.8rem}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background-color:#3d3a3580;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.modal-content{background-color:var(--bg-primary);width:100%;max-width:500px;box-shadow:var(--shadow-lg);border-radius:16px;animation:.3s cubic-bezier(.16,1,.3,1) modalFadeIn;overflow:hidden}@keyframes modalFadeIn{0%{opacity:0;transform:scale(.95)translateY(10px)}to{opacity:1;transform:scale(1)translateY(0)}}.modal-header{background-color:var(--card-bg);border-bottom:1px solid #3d3a3514;justify-content:space-between;align-items:center;padding:1.25rem 1.5rem;display:flex}.modal-title{font-size:1.2rem;font-weight:600}.btn-close{cursor:pointer;color:var(--text-muted);transition:var(--transition-quick);background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:.25rem;display:flex}.btn-close:hover{color:var(--text-main);background-color:#3d3a350d}.modal-body{max-height:75vh;padding:1.5rem;overflow-y:auto}.modal-footer{background-color:var(--card-bg);border-top:1px solid #3d3a3514;justify-content:flex-end;gap:.75rem;padding:1rem 1.5rem;display:flex}.form-group{margin-bottom:1.25rem}.form-label{color:var(--text-main);margin-bottom:.5rem;font-size:.85rem;font-weight:500;display:block}.form-control{background-color:var(--card-bg);width:100%;color:var(--text-main);font-family:var(--font-family);transition:var(--transition-quick);border:1px solid #3d3a3526;border-radius:8px;padding:.75rem 1rem;font-size:.95rem}.form-control:focus{border-color:var(--accent-color);outline:none;box-shadow:0 0 0 3px #8b735526}.upload-dropzone{text-align:center;cursor:pointer;transition:var(--transition-quick);background-color:#fff6;border:2px dashed #3d3a3533;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;padding:1.5rem;display:flex}.upload-dropzone:hover{border-color:var(--accent-color);background-color:#fffc}.upload-icon{width:36px;height:36px;color:var(--text-muted);margin-bottom:.5rem}.upload-preview{object-fit:contain;width:100%;max-height:160px;box-shadow:var(--shadow-sm);border-radius:6px;margin-top:.5rem}.empty-state{text-align:center;color:var(--text-muted);background-color:#ffffff4d;border:1px dashed #3d3a351a;border-radius:16px;max-width:600px;margin:2rem auto;padding:4rem 2rem}.empty-icon{width:64px;height:64px;color:var(--text-muted);opacity:.5;margin-bottom:1.5rem}.loading-spinner{border:3px solid #8b73551a;border-left-color:var(--accent-color);border-radius:50%;width:36px;height:36px;margin:2rem auto;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.toast{color:#fff;box-shadow:var(--shadow-lg);z-index:2000;background-color:#3d3a35;border-radius:8px;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:.9rem;animation:.3s cubic-bezier(.16,1,.3,1) toastIn;display:flex;position:fixed;bottom:2rem;right:2rem}@keyframes toastIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.cheki-edit-action{opacity:0;transition:var(--transition-quick);z-index:10;position:absolute;bottom:8px;right:8px}.cheki-card-container:hover .cheki-edit-action{opacity:1}.btn-edit-cheki{color:var(--text-main);width:28px;height:28px;box-shadow:var(--shadow-sm);cursor:pointer;transition:var(--transition-quick);background-color:#fffffff2;border:1px solid #3d3a3514;border-radius:50%;justify-content:center;align-items:center;display:flex}.btn-edit-cheki:hover{background-color:var(--accent-color);color:#fff;border-color:var(--accent-color);transform:scale(1.05)}