:root{--bg:#081a2d;--panel:#102a43;--panel-alt:#173f63;--sidebar:#04111f;--sidebar-soft:#0b2945;--accent:#38a3e8;--accent-soft:#123e63;--text:#e5f2ff;--muted:#9db8d0;--border:#285274;--shadow:0 18px 35px #0000003d}*{box-sizing:border-box}html,body{background:var(--bg);min-height:100%;color:var(--text);margin:0;font-family:Inter,Segoe UI,sans-serif}body{min-height:100vh}button,input,select{font:inherit}#app{grid-template-columns:280px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{color:#eef2ff;background:linear-gradient(180deg, var(--sidebar), var(--sidebar-soft));align-self:start;height:100vh;padding:2rem 1.5rem;position:sticky;top:0;overflow-y:auto}.sidebar-header{margin-bottom:2rem}.brand{align-items:center;gap:.85rem;display:flex}.brand-logo{flex:none;width:48px;height:48px}.sidebar-header h2{letter-spacing:-.025em;margin:0;font-size:1.08rem;font-weight:750;line-height:1.25}.sidebar-header p{color:#ffffffbf;margin:.65rem 0 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.55rem;font-size:.75rem;font-weight:600;display:inline-flex}.expense-date{color:var(--muted);font-size:.9rem}.expense-category{background:var(--panel-alt);color:var(--accent);border-radius:999px;padding:.3rem;font-size:.75rem;font-weight:700;display:inline-block}.expense-value{color:var(--text);font-size:1.05rem;font-weight:800}.expense-actions{gap:.5rem;display:flex}.expense-action-button{border:1px solid var(--border);background:var(--panel-alt);color:var(--text);cursor:pointer;border-radius:8px;padding:.45rem .7rem}.expense-action-button:hover{filter:brightness(1.15)}.expense-action-button:disabled{cursor:wait;opacity:.6;filter:none;background:#526b80}.empty-state{border:1px dashed var(--border);color:var(--muted);text-align:center;background:#0b2239;border-radius:12px;margin:0;padding:1rem}.form-feedback:empty,.expense-feedback:empty{display:none}.form-feedback,.expense-feedback{border-radius:8px;margin:0;padding:.75rem 1rem;font-weight:600}.expense-feedback{flex:1 0 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