:root{--primary-color:#4a90e2;--danger-color:#d0021b;--light-gray:#f4f4f4;--medium-gray:#e0e0e0;--dark-gray:#333;--font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--border-radius:8px;--box-shadow:0 4px 6px rgba(0, 0, 0, 0.1);--pv-bg:#f7f8fa;--pv-fg:#222;--pv-border:#ccc;--pv-primary:#4a90e2;--pv-card:#fff;--pv-tag-bg:#e6f0fa;--pv-tag-fg:#222;--pv-sidebar-bg:#f8f8f8;--pv-sidebar-border:#eee;--pv-navbar-bg:#4a90e2;--pv-navbar-fg:#fff;--pv-menu-bg:#fff;--pv-menu-fg:#222;--pv-menu-hover:#f4f4f4;--pv-input-bg:#fff;--pv-input-fg:#222;--pv-input-border:#e0e0e0;--pv-scrollbar-bg:#e0e0e0;--pv-scrollbar-thumb:#bdbdbd}[data-theme=dark]{--primary-color:#4a90e2;--danger-color:#d0021b;--light-gray:#23272e;--medium-gray:#444;--dark-gray:#e6e6e6;--pv-bg:#23272e;--pv-fg:#e6e6e6;--pv-border:#444;--pv-primary:#4a90e2;--pv-card:#2d313a;--pv-tag-bg:#2a3a4a;--pv-tag-fg:#e6e6e6;--pv-sidebar-bg:#23272e;--pv-sidebar-border:#333;--pv-navbar-bg:#232c3b;--pv-navbar-fg:#fff;--pv-menu-bg:#23272e;--pv-menu-fg:#e6e6e6;--pv-menu-hover:#333;--pv-input-bg:#23272e;--pv-input-fg:#e6e6e6;--pv-input-border:#444;--pv-scrollbar-bg:#23272e;--pv-scrollbar-thumb:#444e5a}body,html{height:100%}body{font-family:var(--font-family);margin:0;background:var(--pv-bg);color:var(--pv-fg);display:flex;justify-content:center;align-items:center;transition:background .2s,color .2s}.settings-container{display:flex;min-width:480px;min-height:320px;height:100%;overflow:hidden}.settings-sidebar{width:160px;background:var(--pv-sidebar-bg);border-right:1px solid var(--pv-sidebar-border);display:flex;flex-direction:column;padding:1.5rem 0 1.5rem .5rem;gap:1.2rem;font-weight:700;font-size:1.05rem;height:100%}.settings-menu-item{cursor:pointer;padding:.5rem 1rem .5rem .5rem;border-radius:6px 0 0 6px;transition:background .2s}.settings-menu-item.active{background:var(--pv-tag-bg)}.settings-back-btn{margin:0 0 1.5rem 0;width:90%;align-self:center}.settings-content{flex:1 1 auto;padding:2rem 2.5rem;overflow-y:auto;min-width:260px;background:var(--pv-card);color:var(--pv-fg)}.settings-info{color:var(--pv-fg);opacity:.7;margin-top:2rem}.settings-avatar-preview{width:64px;height:64px;border-radius:50%;object-fit:cover;margin-top:.5rem}.settings-avatar-input{margin-top:.5rem}.container{width:100%;height:100%;max-width:1280px;max-height:90vh;background:var(--pv-card);border-radius:var(--border-radius);box-shadow:var(--box-shadow);overflow:hidden;display:flex;flex-direction:column;transition:all .3s ease}.view{display:none;flex-grow:1;overflow-y:auto}.view.active{display:flex;flex-direction:column}.view-content{padding:2rem}form{display:none;flex-direction:column;gap:1rem;max-width:400px;margin:2rem auto 0}form.active{display:flex}input[type=email],input[type=password],input[type=text]{padding:.75rem;border:1px solid var(--pv-input-border);border-radius:var(--border-radius);font-size:1rem;background:var(--pv-input-bg);color:var(--pv-input-fg);transition:background .2s,color .2s}.btn{padding:.75rem 1.5rem;border:none;border-radius:var(--border-radius);font-size:1rem;cursor:pointer;transition:background-color .2s;font-weight:500}.btn-primary{background:var(--pv-primary)!important;color:#fff!important;border:1px solid var(--pv-primary)!important}.btn-primary:hover{opacity:.9}.btn-danger{background-color:var(--danger-color);color:#fff}.btn-secondary{background:0 0!important;color:var(--pv-fg)!important;border:1px solid var(--pv-border)!important}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}header h1,header h2{margin:0}#message-box{position:fixed;top:76px;left:50%;transform:translateX(-50%);padding:1rem 2rem;background-color:var(--dark-gray);color:#fff;border-radius:var(--border-radius);box-shadow:var(--box-shadow);z-index:1001;display:none;opacity:0;transition:opacity .3s}#diagram-list-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.5rem;scrollbar-color:var(--pv-scrollbar-thumb) var(--pv-scrollbar-bg);scrollbar-width:thin}#diagram-list-container::-webkit-scrollbar{width:8px;background:var(--pv-scrollbar-bg)}#diagram-list-container::-webkit-scrollbar-thumb{background:var(--pv-scrollbar-thumb);border-radius:4px}.diagram-card{border:1px solid var(--pv-border);border-radius:var(--border-radius);padding:1rem;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 2px 4px rgba(0,0,0,.05);position:relative;background:var(--pv-card);color:var(--pv-fg);transition:background .2s,color .2s}.diagram-card h3{margin:0 0 1rem 0;word-break:break-all}.diagram-card p{font-size:.8rem;color:var(--pv-fg);opacity:.7;margin:0}.card-actions-btn{position:absolute;bottom:.5rem;right:.5rem;width:32px;height:32px;background:0 0;border:none;cursor:pointer;font-size:1.5rem;color:#888;border-radius:50%;line-height:32px;text-align:center}.card-actions-btn:hover{background-color:var(--light-gray)}.card-actions-menu{display:none;position:absolute;top:2.5rem;right:.5rem;background:var(--pv-menu-bg);color:var(--pv-menu-fg);border-radius:var(--border-radius);box-shadow:var(--box-shadow);z-index:100;list-style:none;padding:.5rem 0;margin:0;min-width:120px;border:1px solid var(--pv-border);transition:background .2s,color .2s}.card-actions-menu.active{display:block}.card-actions-menu li{padding:.75rem 1rem;cursor:pointer}.card-actions-menu li:hover{background:var(--pv-menu-hover)}.card-actions-menu li.delete{color:var(--danger-color)}#editor-view{padding:0}#drawio-iframe-container{flex-grow:1;position:relative}#drawio-iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none}.tab-container{max-width:400px;margin:0 auto}.tab-buttons{display:flex;border-bottom:1px solid var(--medium-gray)}.tab-btn{flex:1;padding:1rem;background:0 0;border:none;font-size:1.1rem;cursor:pointer;border-bottom:3px solid transparent;color:var(--pv-fg);transition:color .2s,background .2s}[data-theme=dark] .tab-btn{color:#e6e6e6;background:#23272e}[data-theme=dark] .tab-btn.active{color:#4a90e2;background:#232c3b;border-bottom-color:#4a90e2}.tab-btn.active{border-bottom-color:var(--primary-color);font-weight:700}.modal-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:1000;justify-content:center;align-items:center}.modal-overlay.active{display:flex}.modal-content{background:var(--pv-card);color:var(--pv-fg);padding:2rem;border-radius:var(--border-radius);width:100%;max-width:400px;box-shadow:var(--box-shadow);border:1px solid var(--pv-border);transition:background .2s,color .2s}.modal-content h2{margin-top:0}.modal-content input{width:100%;box-sizing:border-box;margin-top:1rem}.modal-actions{display:flex;justify-content:flex-end;gap:1rem;margin-top:2rem}.switch{position:relative;display:inline-flex;align-items:center;cursor:pointer;user-select:none;height:28px}.switch-input{display:none}.switch-slider{position:relative;width:48px;height:24px;background:#e0e0e0;border-radius:12px;transition:background .2s;margin-right:.7rem}.switch-slider:before{content:'';position:absolute;left:2px;top:2px;width:20px;height:20px;background:#fff;border-radius:50%;box-shadow:0 1px 4px rgba(0,0,0,.08);transition:left .2s}.switch-input:checked+.switch-slider{background:var(--primary-color)}.switch-input:checked+.switch-slider:before{left:26px}.switch-label-text{font-size:1rem;color:#333;font-weight:500}.navbar{width:100%;height:calc(56px + env(safe-area-inset-top,0px));background:var(--pv-navbar-bg);color:var(--pv-navbar-fg);display:flex;align-items:center;justify-content:space-between;padding:env(safe-area-inset-top,0) 2rem 0 2rem;box-sizing:border-box;position:fixed;top:0;left:0;z-index:1002;transition:background .2s,color .2s}.navbar-title{font-size:1.4rem;font-weight:700;letter-spacing:1px;height:56px;line-height:56px}.navbar-right{height:56px;line-height:56px;margin-left:auto;white-space:nowrap;position:relative;color:var(--pv-navbar-fg)}.navbar-avatar-container{display:flex;align-items:center;height:56px;cursor:pointer}.navbar-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover;background:#e0e0e0}.navbar-avatar-fallback{width:36px;height:36px;border-radius:50%;background:#e0e0e0;color:#4a90e2;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;user-select:none}.navbar-menu{position:absolute;top:56px;right:0;background:var(--pv-menu-bg);color:var(--pv-menu-fg);border-radius:8px;box-shadow:0 2px 8px var(--pv-border);list-style:none;padding:.5rem 0;margin:0;min-width:140px;z-index:2000;border:1px solid var(--pv-border);transition:background .2s,color .2s}.navbar-menu-user{padding:.5rem 1.2rem;color:var(--pv-menu-fg)}.navbar-menu-item{padding:.1rem 1.2rem;cursor:pointer;color:var(--pv-menu-fg);transition:background .2s,color .2s}.navbar-menu-item:hover{background:var(--pv-menu-hover)}.navbar-menu-logout{color:var(--danger-color)}.main-container{margin-top:calc(env(safe-area-inset-top,0px));display:flex;flex-direction:row}.sidebar-folder{width:260px;min-width:200px;border-radius:8px;padding:1rem .5rem;box-shadow:0 2px 8px var(--pv-border);background-color:var(--pv-sidebar-bg);display:flex;flex-direction:column;position:relative;z-index:2}.sidebar-folder-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.sidebar-folder-title{font-weight:700;font-size:1.1rem}.sidebar-folder-new{padding:.3rem .8rem;font-size:.95rem}.folder-tree{list-style:none;padding:0;margin:0;overflow-y:auto}.main-content{flex:1 1 auto;min-width:0;display:flex;flex-direction:column}.dashboard-content{min-height:500px}.dashboard-header{display:flex;justify-content:space-between;align-items:center}.loading-overlay{display:none;position:fixed;top:0;left:0;width:100vw;height:100vh;z-index:2000;background:var(--pv-loading-overlay-bg,rgba(255,255,255,.6));backdrop-filter:blur(2px);justify-content:center;align-items:center}.loading-box{padding:2rem 3rem;background:var(--pv-card);border-radius:12px;box-shadow:0 2px 12px var(--pv-border)}.loading-text{font-size:1.2rem;color:#4a90e2}.navbar-hamburger-btn{display:none;font-size:1.8rem;background:0 0;border:none;color:#fff;cursor:pointer;margin-right:1rem}.sidebar-backdrop{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.4);z-index:998}.sidebar-backdrop.visible{display:block}@media (max-width:768px){.navbar-hamburger-btn{display:block}.navbar{padding:0 1rem}.sidebar-folder{position:fixed;left:-100%;top:56px;width:280px;height:calc(100% - 56px);z-index:999;transition:left .3s ease;box-shadow:4px 0 10px rgba(0,0,0,.1);border-radius:0}.sidebar-folder.visible{left:0}.settings-container{flex-direction:column;min-width:100%;height:auto}.settings-sidebar{width:100%;flex-direction:row;overflow-x:auto;padding:.5rem;border-right:none;border-bottom:1px solid #eee;height:auto;gap:.5rem;box-sizing:border-box}.settings-menu-item{border-radius:6px;text-align:center;flex-shrink:0}.settings-menu-item.active{border-radius:6px}.settings-back-btn{display:none}.settings-content{padding:1.5rem}}.search-bar{display:flex;align-items:center;padding:1rem;border-top:1px solid var(--border-color);background-color:var(--card-bg-color);position:sticky;bottom:0;z-index:5}.search-bar input{flex-grow:1;padding:.5rem .75rem;border:1px solid #ccc;border-radius:var(--border-radius);font-size:.9rem;background-color:var(--input-bg-color);color:var(--text-color)}.search-bar input::placeholder{color:var(--text-color-light)}.search-bar .icon-button{width:30px;height:30px;min-width:30px;border:none;background:0 0;color:var(--text-color-light);cursor:pointer;margin-left:.5rem;padding:0;display:flex;align-items:center;justify-content:center}.search-bar .icon-button:hover{color:var(--primary-color)}.search-bar .icon-button svg{width:20px;height:20px}.diagram-tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:.5rem;min-height:20px}.tag-badge{background-color:var(--primary-color-light);color:var(--primary-color);padding:.2em .2em;border-radius:var(--border-radius);font-size:.75rem;white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis}.tag-filter-section{padding:1rem;border-top:1px solid var(--border-color);background-color:var(--card-bg-color);z-index:5;flex:1 1 auto}.tag-filter-section .section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.tag-filter-section h3{margin:0;font-size:1rem;color:var(--text-color)}.tag-list-container{display:flex;flex-wrap:wrap;gap:.5rem;max-height:150px;overflow-y:auto;-webkit-overflow-scrolling:touch}.tag-list-container .tag-badge.selected{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color)}.tag-filter-section .icon-button{width:24px;height:24px;min-width:24px;color:var(--text-color-light);margin:0}.tag-filter-section .icon-button:hover{color:var(--primary-color)}.tag-filter-section .icon-button svg{width:16px;height:16px}.tag-edit-bar{display:flex;flex-direction:row;align-items:center;gap:10px;margin-top:2px}.tag-edit-input-wrap{position:relative;flex:1 1 0;display:flex;align-items:center;height:36px}.tag-edit-input{flex:1 1 0;min-width:80px;max-width:150px;height:36px;font-size:15px;padding:0 10px;border:1px solid #ccc;margin-top:0;border-radius:0;box-sizing:border-box}.tag-edit-btn{height:36px;font-size:15px;padding:0 16px;border-radius:0;margin-left:0;cursor:pointer}.tag-edit-suggestion-box{position:absolute;top:100%;left:0;width:100%;background:var(--pv-card);color:var(--pv-fg);border:1px solid var(--pv-border);border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,.08);z-index:10;max-height:180px;overflow-y:auto;font-size:1rem;margin-top:2px;display:none}.tag-edit-suggestion-box div{padding:6px 16px;cursor:pointer;transition:background .2s}.tag-edit-suggestion-box div:hover{background:var(--pv-menu-hover)}.tag-edit-suggestion-box .tag-suggestion-item{padding:4px 12px;cursor:pointer}@media (max-width:480px){.view-content{padding:1rem}#diagram-list-container{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}.modal-content,.tab-container{max-width:90vw;padding:1.5rem}form{margin-top:1.5rem}}.force-landscape{overflow:hidden}.landscape-prompt{display:none;position:absolute;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.75);color:#fff;flex-direction:column;justify-content:center;align-items:center;z-index:10;gap:1.5rem;font-size:1.2rem;text-align:center}@media (orientation:portrait){.force-landscape{width:100vh;height:100vw;transform-origin:top left;transform:rotate(90deg) translateY(-100vw)}.force-landscape .landscape-prompt{display:flex}}.tag-badge.selected{background:var(--pv-primary)!important;color:#fff!important;border-color:var(--pv-primary)!important;box-shadow:0 2px 8px rgba(74,144,226,.1);font-weight:700;transition:background .2s,color .2s}#clear-tag-filters-btn{color:var(--pv-fg)!important;background-color:var(--pv-card)!important}.lang-switcher button{background:0 0;border:none;cursor:pointer;font-weight:600;color:var(--text-muted);padding:4px 10px;font-size:1.05rem;border-radius:6px;margin-left:2px;transition:color .2s,background .2s}.lang-switcher button.active{color:var(--primary-color);background-color:#e6f0fa;border-radius:6px;font-weight:700}.share-link-area{display:inline-flex;align-items:center;gap:.5rem;background:var(--pv-input-bg);padding:.25em .75em;border-radius:6px;box-shadow:0 1px 4px rgba(0,0,0,.04)}.share-link-url{color:var(--primary-color);text-decoration:underline;word-break:break-all}.share-link-btn{background:0 0;border:none;cursor:pointer;padding:0 .2em;margin-left:4px;display:flex;align-items:center;border-radius:4px;transition:background .2s}.share-link-btn:hover{background:var(--pv-menu-hover)}@media (prefers-color-scheme:dark){.share-link-area{box-shadow:0 1px 6px rgba(0,0,0,.18)}}.dropdown{width:100%;margin-top:1rem;padding:.5rem;font-size:1rem;background-color:var(--pv-card);color:var(--pv-fg)}.sso-btn-group{margin:24px 0 0 0;padding:0 0 8px 0;text-align:center}.sso-btn-group-title{color:#888;font-size:.98em;margin-bottom:10px;letter-spacing:.02em}.sso-btn-row{display:flex;gap:14px;justify-content:center;margin-bottom:0}.sso-btn{display:flex;align-items:center;gap:7px;background:#fff;border:1px solid #e0e0e0;color:#222;font-weight:500;font-size:1em;border-radius:6px;padding:7px 18px 7px 13px;box-shadow:0 1px 4px rgba(0,0,0,.04);cursor:pointer;transition:box-shadow .18s,border .18s;min-width:110px;justify-content:center}.sso-btn:hover{border:1.5px solid #4a90e2;box-shadow:0 2px 8px rgba(74,144,226,.1)}.sso-icon{width:20px;height:20px;vertical-align:middle;display:inline-block}@media (max-width:480px){.sso-btn-row{flex-direction:column;gap:10px}.sso-btn{width:100%;min-width:0;justify-content:center}}