@import"https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;900&display=swap";*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #667eea;--primary-dark: #5568d3;--secondary: #764ba2;--accent: #f093fb;--success: #48bb78;--warning: #ed8936;--danger: #f56565;--bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--card-shadow: 0 10px 40px rgba(0, 0, 0, .1);--card-shadow-hover: 0 20px 60px rgba(0, 0, 0, .15);--text-primary: #2d3748;--text-secondary: #4a5568;--text-light: #718096;--border: #e2e8f0;--radius: 15px;--radius-large: 20px;--transition: all .3s cubic-bezier(.4, 0, .2, 1)}body{font-family:Noto Sans JP,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-gradient);color:var(--text-primary);min-height:100vh;line-height:1.6}.loading-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--bg-gradient)}.spinner{width:40px;height:40px;border:4px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}.spinner.large{width:60px;height:60px;border-width:6px}.spinner.small{width:20px;height:20px;border-width:3px}@keyframes spin{to{transform:rotate(360deg)}}.passcode-gate{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem;background:var(--bg-gradient)}.passcode-card{background:#fff;padding:3rem 2.5rem;border-radius:var(--radius-large);box-shadow:0 25px 80px #0003;max-width:450px;width:100%;text-align:center;animation:slideUp .5s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.passcode-card.shake{animation:shake .5s ease}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-10px)}75%{transform:translate(10px)}}.lock-icon{width:100px;height:100px;margin:0 auto 1.5rem;display:flex;align-items:center;justify-content:center;background:var(--bg-gradient);border-radius:50%;color:#fff}.passcode-card h1{font-size:2rem;font-weight:900;margin-bottom:.5rem;background:var(--bg-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{color:var(--text-light);margin-bottom:2rem;font-size:1rem}.passcode-input{width:100%;padding:1rem 1.5rem;font-size:1.2rem;border:2px solid var(--border);border-radius:var(--radius);outline:none;transition:var(--transition);text-align:center;letter-spacing:.3em;font-weight:600}.passcode-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #667eea1a}.error-message{color:var(--danger);margin-top:1rem;font-size:.9rem;font-weight:500}.submit-btn{width:100%;padding:1rem;margin-top:1.5rem;background:var(--bg-gradient);color:#fff;border:none;border-radius:var(--radius);font-size:1rem;font-weight:700;cursor:pointer;transition:var(--transition)}.submit-btn:hover{transform:translateY(-2px);box-shadow:0 10px 25px #667eea4d}.submit-btn:active{transform:translateY(0)}.hint{margin-top:1.5rem;font-size:.85rem;color:var(--text-light);padding:.75rem;background:#f7fafc;border-radius:var(--radius)}.app-header{background:#fff;box-shadow:0 2px 20px #0000000d;position:sticky;top:0;z-index:100}.header-container{max-width:1400px;margin:0 auto;padding:1.5rem 2rem;display:flex;align-items:center;justify-content:space-between}.logo-section .logo{font-size:1.5rem;font-weight:900;background:var(--bg-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.25rem}.tagline{font-size:.85rem;color:var(--text-light)}.header-actions{display:flex;gap:1.5rem;align-items:center}.logout-btn{padding:.75rem;background:#f7fafc;border:none;border-radius:var(--radius);cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;color:var(--text-secondary)}.logout-btn:hover{background:#edf2f7;color:var(--primary)}.reading-level-toggle{display:flex;align-items:center;gap:.75rem;background:#f7fafc;padding:.5rem 1rem;border-radius:var(--radius)}.level-label{font-size:.85rem;font-weight:600;color:var(--text-secondary)}.level-buttons{display:flex;gap:.5rem}.level-btn{width:40px;height:40px;border:2px solid var(--border);background:#fff;border-radius:var(--radius);font-weight:700;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;font-size:.9rem}.level-btn:hover{border-color:var(--primary);transform:translateY(-2px)}.level-btn.active{background:var(--bg-gradient);color:#fff;border-color:transparent;box-shadow:0 4px 12px #667eea4d}.level-name{font-size:.85rem;color:var(--text-light);font-weight:500}.main-content{max-width:1400px;margin:0 auto;padding:2rem;min-height:calc(100vh - 100px)}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;flex-wrap:wrap;gap:1rem}.filter-section{display:flex;align-items:center;gap:1rem;background:#fff;padding:1rem 1.5rem;border-radius:var(--radius-large);box-shadow:var(--card-shadow)}.category-filters{display:flex;gap:.5rem}.filter-btn{padding:.5rem 1.25rem;border:2px solid var(--border);background:#fff;border-radius:25px;font-weight:600;cursor:pointer;transition:var(--transition);font-size:.9rem}.filter-btn:hover{border-color:var(--primary);color:var(--primary)}.filter-btn.active{background:var(--bg-gradient);color:#fff;border-color:transparent}.create-post-btn{padding:1rem 2rem;background:var(--bg-gradient);color:#fff;border:none;border-radius:var(--radius-large);font-weight:700;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:.5rem;box-shadow:0 4px 20px #667eea4d}.create-post-btn:hover{transform:translateY(-3px);box-shadow:0 8px 30px #667eea66}.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:2rem}.post-card{background:#fff;border-radius:var(--radius-large);overflow:hidden;box-shadow:var(--card-shadow);transition:var(--transition);position:relative}.post-card:hover{transform:translateY(-5px);box-shadow:var(--card-shadow-hover)}.post-image{width:100%;height:250px;overflow:hidden;background:linear-gradient(135deg,#f5f7fa,#c3cfe2)}.post-image img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}.post-card:hover .post-image img{transform:scale(1.05)}.post-content{padding:1.5rem}.post-meta{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}.category-badge{display:inline-flex;align-items:center;gap:.4rem;padding:.4rem .9rem;border-radius:20px;font-size:.8rem;font-weight:600;color:#fff}.post-date{display:inline-flex;align-items:center;gap:.4rem;font-size:.8rem;color:var(--text-light)}.post-title{font-size:1.4rem;font-weight:700;margin-bottom:.75rem;color:var(--text-primary);line-height:1.4}.post-body{color:var(--text-secondary);line-height:1.8;margin-bottom:1rem;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.post-body ruby rt{font-size:.65em;color:var(--primary)}.post-actions{display:flex;gap:1rem;padding-top:1rem;border-top:1px solid var(--border)}.export-btn{flex:1;padding:.75rem 1.25rem;background:var(--bg-gradient);color:#fff;border:none;border-radius:var(--radius);font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:.5rem;font-size:.9rem}.export-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 15px #667eea4d}.export-btn:disabled{opacity:.6;cursor:not-allowed}.delete-btn{padding:.75rem 1.25rem;background:#f56565;color:#fff;border:none;border-radius:var(--radius);font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:.5rem;font-size:.9rem}.delete-btn:hover:not(:disabled){background:#e53e3e;transform:translateY(-2px)}.delete-btn:disabled{opacity:.6;cursor:not-allowed}.converting-overlay{position:absolute;inset:0;background:#ffffffe6;display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.create-post-page{min-height:calc(100vh - 100px)}.page-container{max-width:800px;margin:0 auto;background:#fff;padding:3rem;border-radius:var(--radius-large);box-shadow:var(--card-shadow)}.page-container h1{font-size:2rem;font-weight:900;margin-bottom:2rem;background:var(--bg-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.post-form{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:600;color:var(--text-primary);font-size:.95rem}.category-select,.title-input,.content-textarea{padding:1rem;border:2px solid var(--border);border-radius:var(--radius);font-size:1rem;font-family:inherit;transition:var(--transition);outline:none}.category-select:focus,.title-input:focus,.content-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #667eea1a}.title-input{font-size:1.2rem;font-weight:600}.content-textarea{resize:vertical;line-height:1.8}.category-input-group{display:flex;gap:.75rem;flex-wrap:wrap}.category-input-group .category-select{flex:1;min-width:150px}.custom-category-input{flex:2;padding:1rem;border:2px solid var(--border);border-radius:var(--radius);font-size:1rem;font-family:inherit;transition:var(--transition);outline:none;min-width:200px}.custom-category-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #667eea1a}.image-upload-label{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.75rem;padding:3rem;border:2px dashed var(--border);border-radius:var(--radius);cursor:pointer;transition:var(--transition);color:var(--text-light)}.image-upload-label:hover{border-color:var(--primary);background:#667eea0d;color:var(--primary)}.image-preview{position:relative;border-radius:var(--radius);overflow:hidden;border:2px solid var(--border)}.image-preview img{width:100%;height:auto;max-height:400px;object-fit:cover;display:block}.remove-image-btn{position:absolute;top:1rem;right:1rem;width:36px;height:36px;background:#000000b3;color:#fff;border:none;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition)}.remove-image-btn:hover{background:var(--danger)}.form-actions{display:flex;gap:1rem;margin-top:1rem}.cancel-btn,.submit-btn{flex:1;padding:1rem 2rem;border:none;border-radius:var(--radius);font-weight:700;font-size:1rem;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:.5rem}.cancel-btn{background:#f7fafc;color:var(--text-secondary)}.cancel-btn:hover:not(:disabled){background:#edf2f7}.submit-btn{background:var(--bg-gradient);color:#fff;box-shadow:0 4px 20px #667eea4d}.submit-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 30px #667eea66}.submit-btn:disabled,.cancel-btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important}.loading-state,.empty-state{text-align:center;padding:4rem 2rem;background:#fff;border-radius:var(--radius-large);box-shadow:var(--card-shadow)}.loading-state p,.empty-state p{margin-top:1.5rem;color:var(--text-light);font-size:1.1rem}.create-first-btn{margin-top:1.5rem;padding:1rem 2rem;background:var(--bg-gradient);color:#fff;border:none;border-radius:var(--radius);font-weight:700;cursor:pointer;transition:var(--transition);box-shadow:0 4px 20px #667eea4d}.create-first-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px #667eea66}@media(max-width:768px){.header-container{flex-direction:column;gap:1rem}.page-header{flex-direction:column;align-items:stretch}.filter-section{flex-wrap:wrap;justify-content:center}.posts-grid{grid-template-columns:1fr}.page-container{padding:2rem 1.5rem}.reading-level-toggle{flex-wrap:wrap;justify-content:center}}