:root{--bg:#f5f7fa;--surface:#fff;--text:#172033;--text-2:#526075;--accent:#0f766e;--accent-contrast:#fff;--border:#dce3eb;--danger:#b42318;--warn:#92400e;--radius:10px;--nav-w:280px;--list-w:300px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}[data-theme=dark]{--bg:#101722;--surface:#182231;--text:#e5edf5;--text-2:#9fb0c3;--border:#2a3648;--accent:#2dd4bf;--accent-contrast:#06302c}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#101722;--surface:#182231;--text:#e5edf5;--text-2:#9fb0c3;--border:#2a3648;--accent:#2dd4bf;--accent-contrast:#06302c}}*{box-sizing:border-box}[hidden]{display:none!important}html,body{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe 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var(--border);align-items:center;gap:12px;padding:8px 16px;display:flex}.brand{cursor:pointer;background:0 0;border:none;border-radius:8px;flex:none;min-height:32px;padding:4px 6px;font-size:16px;font-weight:700}.brand:hover{background:color-mix(in srgb, var(--accent) 14%, transparent);color:var(--accent)}.topbar input[type=search]{flex:1;min-width:0}.main{grid-template-columns:var(--list-w) minmax(0, 1fr);min-height:0;display:grid}.nav,.note-list,.editor-panel{min-height:0;overflow-y:auto}.nav{border-right:1px solid var(--border);background:var(--surface);width:min(var(--nav-w), 86vw);z-index:20;visibility:hidden;padding:12px;transition:transform .15s,visibility 0s linear .15s;position:fixed;top:0;bottom:0;left:0;transform:translate(-105%);box-shadow:4px 0 24px #0003}.nav.open{visibility:visible;transition:transform .15s,visibility;transform:none}.nav-backdrop.open{display:block}.nav button.navitem{text-align:left;background:0 0;border:none;border-radius:8px;align-items:center;gap:8px;width:100%;padding:6px 10px;display:flex}.nav button.navitem[aria-current=true]{background:var(--accent);color:var(--accent-contrast)}.nav .tree{margin:4px 0 0;padding:0;list-style:none}.nav .tree ul{padding-left:16px;list-style:none}.nav .tree button{min-height:32px}.nav-head{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.nav-backdrop{z-index:19;background:#0a0f1973;display:none;position:fixed;inset:0}.tree-search{width:100%;min-height:34px;margin:4px 0 8px;padding:4px 10px}.tree-section{text-transform:uppercase;letter-spacing:.06em;color:var(--text-2);margin:12px 8px 4px;font-size:12px}.tree-hint{color:var(--text-2);margin:0 8px 6px;font-size:11px;line-height:1.4}.tree-row{align-items:center;gap:2px;display:flex}.tree-row .navitem{flex:1;min-width:0}.tree-chevron,.tree-pin{min-width:28px;min-height:32px;color:var(--text-2);background:0 0;border:none;flex:none;padding:0 4px}.tree-pin[aria-pressed=true]{color:var(--accent)}.tree-chevron-spacer{flex:none;width:28px}.context-menu{z-index:60;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;min-width:220px;padding:4px;display:flex;position:fixed;box-shadow:0 12px 32px #00000047}.context-menu-item{text-align:left;background:0 0;border:none;border-radius:8px;min-height:34px;padding:8px 12px;font-size:14px}.context-menu-item:hover:not(:disabled){background:var(--accent);color:var(--accent-contrast)}.context-menu-item:disabled{color:var(--text-2);opacity:.55;cursor:default}.context-menu-item.danger{color:var(--danger)}.context-menu-item.danger:hover:not(:disabled){background:var(--danger);color:#fff}@media (width<=767px){.context-menu-item{min-height:44px}}.nav h2{text-transform:uppercase;letter-spacing:.06em;color:var(--text-2);margin:16px 8px 4px;font-size:12px}.note-list{border-right:1px solid 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var(--surface));color:var(--text)}.banner.error{background:color-mix(in srgb, var(--danger) 12%, var(--surface))}.empty{text-align:center;color:var(--text-2);padding:32px 16px}.conflict-branch{border:1px solid var(--border);border-radius:var(--radius);margin:8px 0;padding:12px}.bottom-nav{display:none}.attachment-placeholder{border:1px dashed var(--border);text-align:center;color:var(--text-2);border-radius:8px;padding:24px}.visually-hidden{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}@media (width<=767px){.main{grid-template-columns:minmax(0,1fr)}.note-list{border-right:none}.main.show-editor .note-list,.main:not(.show-editor) .editor-panel{display:none}button,input,select{min-height:44px}button.icon{min-width:44px}.nav button.navitem,.note-card{padding:10px 12px}.list-control,.tree-search{min-height:44px}.back-to-list{display:inline-flex}.study-card{margin:16px auto;padding:16px}.grade-btn{min-height:52px}.study-hint{display:none}#app{grid-template-rows:auto 1fr auto}.bottom-nav{background:var(--surface);border-top:1px solid var(--border);padding:4px env(safe-area-inset-right) calc(4px + env(safe-area-inset-bottom)) env(safe-area-inset-left);display:flex}.bottom-nav button{background:0 0;border:none;flex:1;font-size:12px}.bottom-nav button[aria-current=true]{color:var(--accent);font-weight:700}.topbar .brand{display:none}.toolbar button{min-width:44px;min-height:44px}.chip{min-height:44px;padding:4px 14px}.nav .tree button,.tree-chevron,.tree-pin{min-height:44px}.tree-chevron,.tree-pin{min-width:40px}.toolbar-more{display:none}.toolbar.expanded .toolbar-more{flex-wrap:wrap;gap:4px;width:100%;display:flex}.toolbar button.toolbar-toggle{display:inline-flex}.toolbar.expanded .toolbar-toggle{background:var(--accent);color:var(--accent-contrast)}.tiptap{min-height:20vh}.sync-status{padding:4px 10px;font-size:12px}.sync-status .full{display:none}.sync-status .short{display:inline}.new-note{white-space:nowrap}.new-note .full{display:none}.topbar input[type=search]{min-width:96px}}