:root,[data-theme=dark]{--bg: #0e0e10;--surface: #18181b;--surface-hover: #222225;--border: rgba(255, 255, 255, .08);--text: #fafafa;--text-muted: rgba(255, 255, 255, .5);--accent: #818cf8;--accent-hover: #6366f1;--danger: #f87171;--check-bg: rgba(255, 255, 255, .06);--check-border: rgba(255, 255, 255, .18);--radius: .625rem;color-scheme:dark}[data-theme=light]{--bg: #f4f4f5;--surface: #ffffff;--surface-hover: #f0f0f2;--border: rgba(0, 0, 0, .08);--text: #18181b;--text-muted: rgba(0, 0, 0, .45);--accent: #6366f1;--accent-hover: #4f46e5;--danger: #dc2626;--check-bg: rgba(0, 0, 0, .04);--check-border: rgba(0, 0, 0, .18);color-scheme:light}*,*:before,*:after{box-sizing:border-box;margin:0}html,body,#root{min-height:100vh}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.app-shell{max-width:28rem;margin:0 auto;padding:3rem 1.25rem 2rem}.app-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}.app-header h1{font-size:1.75rem;font-weight:700;letter-spacing:-.04em}.theme-toggle{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);width:2.25rem;height:2.25rem;font-size:1.15rem;cursor:pointer;display:grid;place-items:center;color:var(--text);transition:background .15s}.theme-toggle:hover{background:var(--surface-hover)}.add-bar{display:flex;gap:.5rem;margin-bottom:.5rem}.add-input{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.6rem .85rem;font-size:.925rem;color:var(--text);outline:none;transition:border-color .15s}.add-input::placeholder{color:var(--text-muted)}.add-input:focus{border-color:var(--accent)}.icon-btn{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);width:2.5rem;font-size:1.1rem;cursor:pointer;color:var(--text-muted);transition:all .15s}.icon-btn:hover,.icon-btn.active{background:var(--surface-hover);color:var(--accent);border-color:var(--accent)}.add-btn{background:var(--accent);border:none;border-radius:var(--radius);width:2.5rem;font-size:1.35rem;font-weight:600;color:#fff;cursor:pointer;transition:background .15s}.add-btn:disabled{opacity:.35;cursor:default}.add-btn:not(:disabled):hover{background:var(--accent-hover)}.reminder-bar{display:flex;align-items:center;gap:.75rem;margin-bottom:.75rem;padding:.55rem .85rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);font-size:.825rem}.reminder-label{display:flex;align-items:center;gap:.5rem;color:var(--text-muted)}.reminder-datetime{background:var(--bg);border:1px solid var(--border);border-radius:.375rem;padding:.25rem .5rem;font-size:.8rem;color:var(--text);outline:none}.reminder-datetime:focus{border-color:var(--accent)}.filters{display:flex;gap:.35rem;margin-bottom:1rem}.filter-btn{background:none;border:1px solid transparent;border-radius:.375rem;padding:.25rem .65rem;font-size:.78rem;text-transform:capitalize;color:var(--text-muted);cursor:pointer;transition:all .15s}.filter-btn:hover{color:var(--text)}.filter-btn.active{color:var(--accent);border-color:var(--accent);background:#6366f114}.todo-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:.4rem;min-height:4rem}.empty{text-align:center;color:var(--text-muted);padding:2rem 0;font-size:.9rem}.todo-item{display:flex;align-items:center;gap:.6rem;padding:.6rem .75rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:background .15s,opacity .2s}.todo-item:hover{background:var(--surface-hover)}.todo-item.done{opacity:.5}.check-btn{flex-shrink:0;width:1.35rem;height:1.35rem;border:1.5px solid var(--check-border);border-radius:50%;background:var(--check-bg);cursor:pointer;display:grid;place-items:center;font-size:.7rem;color:var(--accent);transition:all .15s}.check-btn:hover{border-color:var(--accent)}.todo-text{flex:1;font-size:.925rem;word-break:break-word}.todo-item.done .todo-text{text-decoration:line-through;color:var(--text-muted)}.reminder-badge{flex-shrink:0;font-size:.7rem;color:var(--accent);white-space:nowrap}.reminder-badge.fired{color:var(--text-muted)}.remove-btn{flex-shrink:0;background:none;border:none;font-size:1.15rem;color:var(--text-muted);cursor:pointer;padding:0 .15rem;line-height:1;transition:color .15s;opacity:0}.todo-item:hover .remove-btn{opacity:1}.remove-btn:hover{color:var(--danger)}.app-footer{display:flex;align-items:center;justify-content:space-between;margin-top:1.25rem;padding-top:.85rem;border-top:1px solid var(--border);font-size:.78rem;color:var(--text-muted)}.text-btn{background:none;border:none;color:var(--accent);cursor:pointer;font-size:.78rem;padding:0;transition:color .15s}.text-btn:hover{color:var(--accent-hover)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:3px}[data-theme=light] ::-webkit-scrollbar-thumb{background:#0000001f}