:root{--primary: #4f46e5;--primary-hover: #4338ca;--primary-light: #eef2ff;--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #0f172a;--muted: #64748b;--danger: #ef4444;--bubble-own-bg: #4f46e5;--bubble-own-txt: #ffffff;--bubble-other-bg:#f1f5f9;--bubble-other-txt:#0f172a;--reply-bar-bg: #fffbeb;--reply-bar-border:#f59e0b;--highlight: #fef3c7;--radius: 8px;--radius-lg: 16px;--shadow: 0 1px 4px rgba(0,0,0,.08);--shadow-md: 0 4px 16px rgba(0,0,0,.12)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}button{cursor:pointer;font:inherit;border:none;background:none}input,textarea{font:inherit}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.page{display:flex;flex-direction:column;min-height:100vh}.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 16px;border-radius:var(--radius);font-size:.875rem;font-weight:500;transition:background .15s,color .15s,border-color .15s;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-outline{border:1px solid var(--border);color:var(--text)}.btn-outline:hover:not(:disabled){background:var(--bg)}.btn-ghost{color:var(--muted)}.btn-ghost:hover{color:var(--text)}.form-label{display:flex;flex-direction:column;gap:4px;font-size:.875rem;font-weight:500}.form-input{padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:.9375rem;outline:none;transition:border-color .15s}.form-input:focus{border-color:var(--primary)}.form-error{font-size:.8125rem;color:var(--danger)}.form-card{display:flex;flex-direction:column;gap:14px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow)}.spinner{display:inline-block;width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}.spinner-center{display:flex;justify-content:center;align-items:center;padding:40px}.spinner-center.sm{padding:12px}.spinner-center.sm .spinner{width:18px;height:18px}@keyframes spin{to{transform:rotate(360deg)}}.top-bar{display:flex;align-items:center;gap:12px;padding:10px 20px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10;flex-wrap:wrap}.top-bar-logo{font-size:1.125rem;font-weight:700;flex:1}.top-bar-right{display:flex;align-items:center;gap:12px;margin-left:auto}.top-bar-user{font-size:.875rem;color:var(--muted)}.group-nav{display:flex;gap:4px}.group-nav-link{padding:6px 14px;border-radius:20px;font-size:.875rem;color:var(--muted);transition:background .15s,color .15s}.group-nav-link:hover{background:var(--bg);color:var(--text)}.group-nav-link.active{background:var(--primary-light);color:var(--primary);font-weight:600}.ws-dot{width:8px;height:8px;border-radius:50%;margin-left:auto;flex-shrink:0}.ws-dot.connected{background:#22c55e}.ws-dot.disconnected{background:var(--danger)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px 32px;box-shadow:var(--shadow-md);display:flex;flex-direction:column;gap:24px}.auth-title{font-size:1.5rem;font-weight:700;text-align:center}.auth-tabs{display:flex;border-bottom:1px solid var(--border)}.auth-tab{flex:1;padding:10px;font-size:.9375rem;color:var(--muted);border-bottom:2px solid transparent;transition:color .15s,border-color .15s}.auth-tab.active{color:var(--primary);border-color:var(--primary);font-weight:600}.auth-form{display:flex;flex-direction:column;gap:16px}.groups-main{max-width:800px;margin:0 auto;padding:32px 20px;display:flex;flex-direction:column;gap:24px;width:100%}.groups-header{display:flex;align-items:center;justify-content:space-between}.groups-header h2{font-size:1.5rem;font-weight:700}.group-list{display:flex;flex-direction:column;gap:12px}.group-card{display:flex;align-items:center;justify-content:space-between;gap:16px}.group-card-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.group-card-name{font-size:1.0625rem;font-weight:600}.group-card-desc{font-size:.875rem;color:var(--muted)}.group-card-meta{font-size:.8125rem;color:var(--muted)}.group-card-id{font-size:.75rem;color:var(--muted)}.group-card-id code{background:var(--bg);padding:1px 4px;border-radius:4px;font-size:.75rem}.group-card-links{display:flex;gap:8px;flex-shrink:0}.group-card-title-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.invite-code{background:var(--bg);padding:1px 4px;border-radius:4px;font-size:.75rem;letter-spacing:.05em}.btn-copy{margin-left:6px;font-size:.75rem;color:var(--primary);cursor:pointer;background:none;border:none;padding:0;text-decoration:underline}.btn-request-badge{background:#fef3c7;color:#92400e;border:1px solid #f59e0b;border-radius:12px;padding:2px 10px;font-size:.75rem;font-weight:600;cursor:pointer;white-space:nowrap}.btn-request-badge:hover{background:#fde68a}.form-success{font-size:.8125rem;color:#059669;margin-top:4px}.empty-state{text-align:center;color:var(--muted);padding:40px 0}.join-card{max-width:100%}.join-form{display:flex;gap:8px}.join-form 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6px}.lightbox-panel{background:var(--surface);border-radius:var(--radius-lg);padding:16px;width:100%;max-width:720px;display:flex;flex-direction:column;gap:12px;position:relative;max-height:90vh;overflow-y:auto}.lightbox-img{width:100%;max-height:65vh;object-fit:contain;border-radius:var(--radius);background:var(--bg)}.lightbox-caption{font-size:.95rem;color:var(--text);margin:0}.lightbox-meta{font-size:.8rem;color:var(--text-muted);margin:0}.lightbox-close{position:absolute;top:12px;right:12px;background:none;border:none;font-size:1.25rem;cursor:pointer;color:var(--text-muted);line-height:1;padding:4px 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var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0}.radio-circle--on{border-color:var(--primary)}.radio-dot{width:12px;height:12px;border-radius:50%;background:var(--primary)}.btn-danger-outline{background:transparent;color:var(--danger);border:1px solid var(--danger);border-radius:var(--radius);padding:10px 16px;cursor:pointer;font-weight:600}.btn-danger-outline:hover{background:#fee2e2}.confirm-row{display:flex;flex-direction:column;gap:10px}.confirm-text{font-size:.875rem;color:var(--muted);text-align:center;margin:0}.confirm-btns{display:flex;gap:8px}.confirm-btns .btn{flex:1;justify-content:center}.spinner--sm{width:14px;height:14px;border-width:2px}.upload-preview-wrap{position:relative;display:flex;flex-direction:column;gap:8px}.retake-btn{align-self:flex-start}.fab-wrap{position:fixed;bottom:28px;right:28px;display:flex;flex-direction:column;align-items:flex-end;gap:10px;z-index:200}.fab{width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:2rem;line-height:56px;cursor:pointer;box-shadow:0 4px 16px #0003;display:flex;align-items:center;justify-content:center;padding:0 0 2px;transition:background .15s,transform .15s}.fab:hover{background:var(--primary-dark, #2563eb);transform:scale(1.06)}.fab-menu{display:flex;flex-direction:column;gap:8px;align-items:flex-end}.fab-menu-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:10px 20px;font-size:.9375rem;font-weight:600;cursor:pointer;box-shadow:var(--shadow-md);white-space:nowrap;color:var(--text);transition:background .1s}.fab-menu-item:hover{background:var(--bg)}.dropdown-menu{position:absolute;top:calc(100% + 6px);right:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-md);min-width:140px;z-index:300;overflow:hidden}.dropdown-item{display:block;width:100%;padding:10px 16px;text-align:left;background:none;border:none;font-size:.9rem;cursor:pointer;color:var(--text);transition:background .1s}.dropdown-item:hover{background:var(--bg)}.dropdown-item--danger{color:var(--danger, #dc2626)}.dropdown-item--danger:hover{background:#fef2f2}.upload-groups{display:flex;flex-direction:column;gap:8px}.upload-groups-header{display:flex;align-items:center;justify-content:space-between}.upload-groups-title{font-size:.875rem;font-weight:600;color:var(--muted)}.upload-group-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px;max-height:200px;overflow-y:auto}.upload-group-item{display:flex;align-items:center;gap:10px;padding:8px 4px;cursor:pointer;border-radius:var(--radius);transition:background .1s}.upload-group-item:hover{background:var(--bg)}.upload-group-name{font-size:.9375rem;color:var(--text)}.checkbox-circle{width:20px;height:20px;border-radius:50%;border:2px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:border-color .15s,background .15s}.checkbox-circle--on{border-color:var(--primary);background:var(--primary)}.checkbox-dot{width:8px;height:8px;border-radius:50%;background:#fff}