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ease}.back-link:hover{color:var(--primary-dark)}.post-article{background:var(--card-bg);border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 4px 16px var(--shadow);margin-bottom:var(--spacing-xl)}.post-images{position:relative;aspect-ratio:16 / 10;background:var(--secondary)}.post-main-image{width:100%;height:100%;object-fit:cover}.image-nav{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;background:#ffffffe6;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--text-primary);transition:all .2s ease;box-shadow:0 2px 8px #0000001a}.image-nav:hover{background:#fff;transform:translateY(-50%) scale(1.1)}.image-nav.prev{left:var(--spacing-md)}.image-nav.next{right:var(--spacing-md)}.image-dots{position:absolute;bottom:var(--spacing-md);left:50%;transform:translate(-50%);display:flex;gap:var(--spacing-sm)}.dot{width:8px;height:8px;border-radius:50%;background:#ffffff80;cursor:pointer;transition:all .2s ease}.dot.active{background:#fff;transform:scale(1.2)}.dot:hover{background:#fffc}.post-content{padding:var(--spacing-xl)}.post-header{margin-bottom:var(--spacing-lg)}.post-title{font-size:26px;font-weight:700;margin-bottom:var(--spacing-sm);line-height:1.4}.post-meta{display:flex;align-items:center;gap:var(--spacing-md);color:var(--text-muted);font-size:14px}.post-author{font-weight:500;color:var(--text-secondary)}.post-body{margin-bottom:var(--spacing-xl)}.post-body p{font-size:16px;line-height:1.8;color:var(--text-secondary);white-space:pre-wrap}.post-actions{display:flex;align-items:center;padding-top:var(--spacing-lg);border-top:1px solid var(--border)}.like-button{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-sm);color:var(--text-muted);font-size:15px;font-weight:500;transition:all .2s 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ease}.comment-submit:hover{background:var(--primary-dark)}.comments-list{display:flex;flex-direction:column}.post-not-found{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-md)}@media(max-width:600px){.post-detail-container{padding:var(--spacing-md)}.post-content{padding:var(--spacing-lg)}.post-title{font-size:22px}}.write-page{flex:1;background:var(--background);padding:var(--spacing-xl) var(--spacing-lg)}.write-container{max-width:700px;margin:0 auto;background:var(--card-bg);border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:0 4px 16px 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img{width:100%;height:100%;object-fit:cover}.preview-remove{position:absolute;top:4px;right:4px;width:24px;height:24px;background:#0009;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:background .2s ease}.preview-remove:hover{background:#000c}.form-actions{display:flex;justify-content:flex-end;gap:var(--spacing-md);padding-top:var(--spacing-lg);border-top:1px solid var(--border)}.btn-cancel{padding:var(--spacing-md) var(--spacing-xl);background:transparent;color:var(--text-secondary);font-weight:500;border:1px solid var(--border);border-radius:var(--radius-sm);transition:all .2s ease}.btn-cancel:hover{border-color:var(--text-secondary)}.btn-submit{padding:var(--spacing-md) var(--spacing-xl);background:var(--primary);color:#fff;font-weight:600;border-radius:var(--radius-sm);transition:all .2s ease}.btn-submit:hover{background:var(--primary-dark)}@media(max-width:600px){.write-container{padding:var(--spacing-lg)}.preview-grid{grid-template-columns:repeat(3,1fr)}.form-actions{flex-direction:column-reverse}.btn-cancel,.btn-submit{width:100%}}.auth-page{flex:1;display:flex;align-items:center;justify-content:center;padding:var(--spacing-xl) var(--spacing-lg);background:linear-gradient(135deg,var(--secondary) 0%,var(--background) 100%);min-height:calc(100vh - 124px)}.auth-container{width:100%;max-width:420px;background:var(--card-bg);border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:0 8px 32px var(--shadow)}.auth-header{text-align:center;margin-bottom:var(--spacing-xl)}.auth-title{font-size:28px;font-weight:700;margin-bottom:var(--spacing-xs)}.auth-subtitle{font-size:15px;color:var(--text-secondary)}.auth-form{display:flex;flex-direction:column;gap:var(--spacing-md)}.auth-error{padding:var(--spacing-md);background:#fee2e2;color:#dc2626;border-radius:var(--radius-sm);font-size:14px;text-align:center}.validation-error,.field-error{display:block;color:#dc2626;font-size:13px;margin-top:var(--spacing-xs)}.form-input.input-error{border-color:#dc2626;background:#fef2f2}.form-group{display:flex;flex-direction:column;gap:var(--spacing-xs)}.form-label{font-weight:500;font-size:14px;color:var(--text-primary)}.form-input{padding:var(--spacing-md);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:15px;transition:border-color .2s ease,box-shadow .2s ease}.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px 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button:hover{background:#4338ca}.chat-room-item{display:flex;align-items:center;gap:12px;padding:14px 16px;cursor:pointer;transition:background .2s;position:relative}.chat-room-item:hover{background:#f3f4f6}.chat-room-item.active{background:#eef2ff;border-left:3px solid #4f46e5}.chat-room-avatar{width:44px;height:44px;border-radius:50%;background:#e5e7eb;display:flex;align-items:center;justify-content:center;color:#6b7280;flex-shrink:0}.chat-room-info{flex:1;min-width:0}.chat-room-name{font-weight:600;color:#1f2937;font-size:14px;margin-bottom:2px}.chat-room-preview{font-size:13px;color:#6b7280;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-room-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px}.chat-room-time{font-size:11px;color:#9ca3af}.chat-room-badge{min-width:20px;height:20px;padding:0 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#e5e7eb;border-radius:24px;font-size:14px;outline:none;transition:border-color .2s}.chat-message-input:focus{border-color:#4f46e5}.send-btn{width:44px;height:44px;border-radius:50%;background:#4f46e5;color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s,transform .2s}.send-btn:hover{background:#4338ca;transform:scale(1.05)}.send-btn:disabled{background:#9ca3af;cursor:not-allowed}.chat-no-room{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#9ca3af;text-align:center;padding:40px}.chat-no-room svg{margin-bottom:16px}.chat-no-room h3{margin:0 0 8px;color:#4b5563;font-size:18px}.chat-no-room p{margin:0 0 20px;font-size:14px}.chat-no-room button{padding:12px 24px;background:#4f46e5;color:#fff;border:none;border-radius:8px;cursor:pointer;font-weight:500;transition:background .2s}.chat-no-room button:hover{background:#4338ca}.chat-page-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - 140px);color:#9ca3af}.chat-page-empty svg{margin-bottom:16px}.chat-page-empty p{font-size:16px}.receiver-valid-icon{position:absolute;right:10px;color:#10b981}.receiver-invalid-icon{position:absolute;right:10px;color:#ef4444}.user-suggestions{position:absolute;top:100%;left:0;right:0;margin-top:4px;background:#fff;border:1px solid #e5e7eb;border-radius:8px;box-shadow:0 10px 15px #00000014;max-height:220px;overflow-y:auto;z-index:20}.user-suggestion-item{width:100%;padding:8px 10px;background:transparent;border:none;display:flex;flex-direction:column;align-items:flex-start;cursor:pointer;text-align:left}.user-suggestion-item:hover{background:#f3f4f6}.user-suggestion-name{font-size:14px;font-weight:500;color:#111827}.user-suggestion-username{font-size:12px;color:#6b7280}@media(max-width:768px){.chat-page-container{flex-direction:column;margin-top:0;border-radius:0;min-height:100vh}.chat-sidebar{width:100%;max-height:40vh}.message{max-width:85%}}